FILE NO. A06-002
SERVICE MANUAL
<Compact 4-Way Air Discharge CassetteType>
MMU-AP0071MH
MMU-AP0091MH
MMU-AP0121MH
MMU-AP0151MH
MMU-AP0181MH
• This Service Manual describes contents of the Compact 4-Way Air Discharge Cassette indoor unit.
For the outdoor unit, refer to the Manual with FILE No. A03-009, A05-004, A05-015.
PRINTED IN JAPAN, Apr., 2006 ToMo
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SAFETY CAUTION
The important contents concerned to the safety are described on the product itself and on this Service Manual.
Please read this Service Manual after understanding the described items thoroughly in the following contents,
and keep them.
WARNING
Before troubleshooting or repair work, check the earth wire is connected to the earth
terminals of the main unit, otherwise an electric shock is caused when a leak occurs.
If the earth wire is not correctly connected, contact an electric engineer for rework.
Check earth wires.
Do not modify the products.
Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury.
Prohibition of modification.
For spare parts, use those specified (∗).
If unspecified parts are used, a fire or electric shock may be caused.
∗: For details, refer to the parts list.
Use specified parts.
Before troubleshooting or repair work, do not bring a third party (a child, etc.) except
the repair engineers close to the equipment.
It causes an injury with tools or disassembled parts.
Do not bring a child
Please inform the users so that the third party (a child, etc.) does not approach the equipment.
close to the equipment.
Insulating measures
Connect the cut-off lead cables with crimp contact, etc, put the closed end side
upward and then apply a water-cut method, otherwise a leak or production of fire is
caused at the users’ side.
When repairing the refrigerating cycle, take the following measures.
1) Be attentive to fire around the cycle. When using a gas stove, etc, be sure to put out fire
before work; otherwise the oil mixed with refrigerant gas may catch fire.
2) Do not use a welder in the closed room. When using it without ventilation, carbon
monoxide poisoning may be caused.
No fire
3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder may
catch the inflammables.
Check the used refrigerant name and use tools and materials of the parts which
match with it.
For the products which use R410A refrigerant, the refrigerant name is indicated at a
position on the outdoor unit where is easy to see. To prevent miss-charging, the route of the
service port is changed from one of the former R22.
For an air conditioner which uses R410A, never use other refrigerant than R410A.
For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.
If different types of refrigerant are mixed, abnormal high pressure generates in the refriger-
ating cycle and an injury due to breakage may be caused.
Do not charge refrigerant additionally.
If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in
the refrigerating cycle changes resulted in change of air conditioner characteristics or
refrigerant over the specified standard amount is charged and an abnormal high pressure is
applied to the inside of the refrigerating cycle resulted in cause of breakage or injury.
Therefore if the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute
vacuuming, and then newly recharge the specified amount of liquid refrigerant. In this time,
never charge the refrigerant over the specified amount.
Refrigerant
When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant
or air other than R410A into the specified refrigerant.
If air or others is mixed with the refrigerant, abnormal high pressure generates in the
refrigerating cycle resulted in cause of injury due to breakage.
After installation work, check the refrigerant gas does not leak.
If the refrigerant gas leaks in the room, poisonous gas generates when gas touches to fire
such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.
Never recover the refrigerant into the outdoor unit.
When the equipment is moved or repaired, be sure to recover the refrigerant with recover-
ing device. The refrigerant cannot be recovered in the outdoor unit; otherwise a serious
accident such as breakage or injury is caused.
3
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WARNING
After repair work, surely assemble the disassembled parts, and connect and lead the
removed cables as before. Perform the work so that the cabinet or panel does not
catch the inner cables.
If incorrect assembly or incorrect cable connection was done, a disaster such as a leak or
fire is caused at user’s side.
Assembly/Cabling
After the work has finished, be sure to use an insulation tester set (500V mugger) to
check the resistance is 2MW or more between the charge section and the non-charge
metal section (Earth position).
If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s
side.
Insulator check
Ventilation
When the refrigerant gas leaks during work, execute ventilation.
If the refrigerant gas touches to a fire, poisonous gas generates. A case of leakage of the
refrigerant and the closed room full with gas is dangerous because a shortage of oxygen
occurs. Be sure to execute ventilation.
When checking the circuit inevitably under condition of the power-ON, use rubber
gloves and others not to touch to the charging section.
If touching to the charging section, an electric shock may be caused.
Be attentive to
electric shock
When the refrigerant gas leaks, find up the leaked position and repair it surely.
If the leaked position cannot be found up and the repair work is interrupted, pump-down
and tighten the service valve, otherwise the refrigerant gas may leak into the room.
The poisonous gas generates when gas touches to fire such as fan heater, stove or cocking
stove though the refrigerant gas itself is innocuous.
When installing equipment which includes a large amount of charged refrigerant such
as a multi air conditioner in a sub-room, it is necessary that the density does not the
limit even if the refrigerant leaks.
Compulsion
If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is
caused.
For the installation/moving/reinstallation work, follow to the Installation Manual.
If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric
shock or fire is caused.
After repair work has finished, check there is no trouble.
If check is not executed, a fire, electric shock or injury may be caused. For a check, turn off
the power breaker.
After repair work (installation of front panel and cabinet) has finished, execute a test
run to check there is no generation of smoke or abnormal sound.
Check after rerair
If check is not executed, a fire or an electric shock is caused. Before test run, install the
front panel and cabinet.
Check the following items after reinstallation.
1) The earth wire is correctly connected.
2) The power cord is not caught in the product.
Check after reinstallation
3) There is no inclination or unsteadiness and the installation is stable.
If check is not executed, a fire, an electric shock or an injury is caused.
CAUTION
Be sure to put on gloves (∗) during repair work.
If not putting on gloves, an injury may be caused with the parts, etc.
(∗) Heavy gloves such as work gloves
Put on gloves
Cooling check
When the power was turned on, start to work after the equipment has been
sufficiently cooled.
As temperature of the compressor pipes and others became high due to cooling/heating
operation, a burn may be caused.
4
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• New Refrigerant (R410A)
This air conditioner adopts a new HFC type refrigerant (R410A) which does not deplete the ozone layer.
1. Safety Caution Concerned to New Refrigerant
The pressure of R410A is high 1.6 times of that of the former refrigerant (R22). Accompanied with change of
refrigerant, the refrigerating oil has been also changed.Therefore, be sure that water, dust, the former refriger-
ant or the former refrigerating oil is not mixed into the refrigerating cycle of the air conditioner with new refriger-
ant during installation work or service work. If an incorrect work or incorrect service is performed, there is a
possibility to cause a serious accident. Use the tools and materials exclusive to R410A to purpose a safe work.
2. Cautions on Installation/Service
(1) Do not mix the other refrigerant or refrigerating oil.
For the tools exclusive to R410A, shapes of all the joints including the service port differ from those of the
former refrigerant in order to prevent mixture of them.
(2) As the use pressure of the new refrigerant is high, use material thickness of the pipe and tools which are
specified for R410A.
(3) In the installation time, use clean pipe materials and work with great attention so that water and others do
not mix in because pipes are affected by impurities such as water, oxide scales, oil, etc. Use the clean
pipes.
Be sure to brazing with flowing nitrogen gas. (Never use gas other than nitrogen gas.)
(4) For the earth protection, use a vacuum pump for air purge.
(5) R410A refrigerant is azeotropic mixture type refrigerant.Therefore use liquid type to charge the refrigerant.
(If using gas for charging, composition of the refrigerant changes and then characteristics of the air condi-
tioner change.)
3. Pipe Materials
For the refrigerant pipes, copper pipe and joints are mainly used. It is necessary to select the most appropriate
pipes to conform to the standard. Use clean material in which impurities adhere inside of pipe or joint to a
minimum.
(1) Copper pipe
<Piping>
The pipe thickness, flare finishing size, flare nut and others differ according to a refrigerant type.
When using a long copper pipe for R410A, it is recommended to select “Copper or copper-base pipe without
seam” and one with bonded oil amount 40mg/10m or less. Also do not use crushed, deformed, discolored
(especially inside) pipes. (Impurities cause clogging of expansion valves and capillary tubes.)
<Flare nut>
Use the flare nuts which are attached to the air conditioner unit.
(2) Joint
The flare joint and socket joint are used for joints of the copper pipe.
The joints are rarely used for installation of the air conditioner. However clear impurities when using them.
5
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4. Tools
(1) Required Tools for R410A
Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc.
Accordingly, the tools to be used are classified into the following three types.
1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
3) Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
R410A
Conventional air
air conditioner installation
conditioner installation
No.
Used tool
Usage
Existence of
Whether conven-
Whether new equipment
new equipment tional equipment can can be used with
for R410A
be used
conventional refrigerant
Flare tool
Pipe flaring
Ye s
*(Note 1)
Ye s
‚
Copper pipe gauge for
adjusting projection
margin
Flaring by conventional
flare tool
Ye s
Ye s
*(Note 1)
No
*(Note 1)
No
Torque wrench
Gauge manifold
Charge hose
Connection of flare nut
ƒ
„
Evacuating, refrigerant
charge, run check, etc.
Ye s
No
No
ꢀ
†
Vacuum pump adapter Vacuum evacuating
Ye s
Ye s
No
Ye s
Ye s
Electronic balance for
Refrigerant charge
refrigerant charging
Ye s
‡
Refrigerant cylinder
Leakage detector
Charging cylinder
Refrigerant charge
Gas leakage check
Refrigerant charge
Ye s
Ye s
No
No
No
No
Ye s
No
ˆ
‰
‰
(Note 2)
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2) Charging cylinder for R410A is being currently developed.
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary
as the general tools.
(1) Vacuum pump
(7) Screwdriver (+, –)
Use vacuum pump by
attaching vacuum pump adapter.
(8) Spanner or Monkey wrench
(9) Hole core drill
(2) Torque wrench
(3) Pipe cutter
(4) Reamer
(10) Hexagon wrench (Opposite side 4mm)
(11) Tape measure
(12) Metal saw
(5) Pipe bender
(6) Level vial
Also prepare the following equipments for other installation method and run check.
(1) Clamp meter
(2) Thermometer
(3) Insulation resistance tester
(4) Electroscope
6
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5. Recharge of Refrigerant
When recharge of the refrigerant is required, charge the new refrigerant with the specified amount in the
procedure as described below.
Recover the refrigerant and check there is no refrigerant in the
equipment.
When the pressure has lowered until indication of the
compound gauge pointed -0.1MPa (–76cmHg), open fully the
handle Low and turn off the power of vacuum pump.
Connect the charge hose to the packed valve service ports at gas
side, liquid side, and balance side of the outdoor unit.
Leave it as it is for 1 to 2 minutes and check the indicator of
the compound gauge does not return.
Connect the charge hose to vacuum pump adaptor.
Set the refrigerant cylinder on the electron balance, connect
the charge hose to connecting ports of the cylinder and the
electron gauge, and then charge the liquid refrigerant from the
service port at liquid side. (Shield with the gauge manifold so
that refrigerant does not flow to gas side.)
Open the packed valves of the balance pipe fully at liquid and gas
sides, and then return the valve at gas side a little to the closed side.
Open fully PMV of the outdoor unit.
(Charge the refrigerant as below.)
• Turn on power of the outdoor unit.
• Short CN30 on I/F P.C. board of the outdoor unit.
Low-
High-
•
Turn off power of the outdoor unit within 2 minutes after short-circuiting.
pressure gauge pressure gauge
Connected to
indoor unit
Valve fully closed
(gas side)
Open fully the handle Low of the gauge manifold, and then turn on
the power of vacuum pump for vacuuming.
Gauge
manifold
V
L
VH
Main
pipe
Center unit
Brazed
Service
port
Copper pipe
Reducing
valve
Ø6.4
Fully
tightened
Never charge the refrigerant over the specified amount.
Do not charge the additional refrigerant.
‚
Service port
If charging refrigerant additionally when refrigerant gas
leaks, the refrigerant composition in the refrigerating
cycle changes resulted in change of air conditioner
characteristics or refrigerant over the specified stan-
dard amount is charged and an abnormal high
pressure is applied to the inside of the refrigerating
Ø6.4
Copper pipe
Valve fully closed
(liquid side)
Nitrogen
gas
Connected to other
terminal units
cycle resulted in cause of breakage or injury.
4mm-hexagonal wrench is required.
Set the equipment so that liquid refrigerant can be charged.
‚
When using a cylinder with siphon pipe, liquid can be charged without inversing the cylinder.
[ Cylinder with siphon ]
[ Cylinder without siphon ]
Gauge manifold
Gauge manifold
Siphon
OUTDOOR unit
OUTDOOR unit
c y l i n d e r
a n t i g e r R e f r
Refrigerant
cylinder
Electronic
balance
Electronic
balance
R410A refrigerant is consisted with HFC mixed refrigerant.
Therefore if the refrigerant gas is charged, the composition
of the charged refrigerant changes and characteristics of
the equipment changes.
6. Environment
Use “Vacuum pump method” for an air purge (Discharge of air in the connecting pipe) in installation time.
• Do not discharge flon gas into the air to protect the earth environment.
• Using the vacuum pump method, clear the remained air (Nitrogen, etc.) in the unit. If the air remains, the
pressure in the refrigerating cycle becomes abnormally high and an injury and others are caused due to burst.
7
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1. CONSTRUCTION VIEWS (EXTERNAL VIEWS)
200
595 to 660 Ceiling open dimension
1000 or more
Check port
(
450)
Check port
(
450)
Check port
(
450)
Obustacle
Drain-up standing-up size
Indoor unit
1000 or more
Bottom face
of ceiling
Note)
As ABS is used for the drain discharge port of the main unit,
the vinyl chloride paste cannot be used.
Use the flexible hose (Band fix) included in the package.
4
Space required for
installation and servicing
• Wired remote
controller
(RBC-AMT31E)
16
120
142
64
368.5
268
220.5
145.5
27
Knockout for fresh
air intake Ø100
145.5
93
700 Panel external dimension
595 to 660 Ceiling open dimension
525 Hanging bolt pitch
Drain discharge port
Bottom face
of ceiling
Bottom face
of ceiling
134
63
Hanging bolt
M10 or W3/8
local arrange
105 70
Ceiling panel
Ø162
(Pitch)
4-Ø3.2 hole
(For 4mm
tapping screw)
Ø162 (Pitch)
Wiring connection
port
Refrigerant pipe
(Liquid) Ø6.4
Electric parts box
320.5
For branch duct
knockout square hole Ø150
55
70 105 93
139.5
For branch ductt
knockout square
hole Ø150
575 Unit external dimension
4-Ø3.2 hole
(For 4mm tapping screw)
190.5
Refrigerant pipe (Gas)
0151, 0181MH : Ø12.7
0071 to 0121MH : Ø9.5
Bottom face of ceiling
8
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2. WIRING DIAGRAM
PMV
TC1
3
TA
TCJ
TC2
6 4 3 1 2 5
6 4 3 1 2 5
FS
CN309
(YEL)
1 2 3 4 5 6
1 2 3 4 5 6
1
1
3
1 2
1 2
1 2
1 2
1 2
1 2
1 2 3
1 2 3
3
1
CN41
(BLU)
CN333
(WHI)
CN82 (BLU)
CN100
(BRW)
CN34 CN104 CN102 CN101
(RED) (YEL) (RED) (BLK)
BLK
BLK
5 5
3 3
1 1
3 3
2
1 1
Motor
drive circuit
CN40
(BLU)
BLU
BLU
2 2
1 1
CN334
(WHI)
5 5
4 4
3
U1 U2
A
B
2
1 1
1
2
CN71
CN72
(CHK)
(DISP)
WHI
BLK
CN68
(BLU)
1
2
1 2
1 2
U1 U2
1 1
3 3
1
CN001
(WHI)
RY302
RY303
DP
Outdoor
unit
Adapter for
wireless
remote controller
Wireed
remote controller
3
2
1
CN304
(GRY)
CN80
(GRN)
PNL
3
Fuse
Fuse
T3.15A
250V ~
CN67
(BLK)
1 1
T6.3A
2
1
CN73
(RED)
250V
~
EXCT
Filter
RED
DC20V
Power
supply
circuit
DC15V
DC12V
DC 7 V
WHI
2
1
CN70
(WHI)
3 3
P301
BLK
5
4
3
2
1
CN20
(BLU)
Indoor unit
earth screw
Flow selector
unit earth screw
GRL
1
2
CN66
(WHI)
Control P.C. board
for Indoor unit
MCC-1402
1 1
2 2
3 3
4 4
5 5
1 1
2 2
3 3
4 4
5 5
1 1
2 2
3 3
4 4
5 5
1
2
CN44
(BRW)
R(L) S(N)
CN33
(WHI)
LM1
Power supply
single phase
220-240V, 50Hz
220V, 60Hz
1
2
3
4
5
CN50
(WHI)
1 1
2 2
3 3
4 4
5 5
CN32
(WHI)
CN61
(YEL)
CN60
(WHI)
CN81
(BLK)
LM2
1 2
1 2 3 4 5 6
1 2 3 4 5 6
Option
1 2 3 4 5
T10
(Fan drive)
Color
indication
Symbol
FM
Parts name
Fan motor
TA
TC1
TCJ
TC2
LM1, LM2
DP
FS
RY302
PMV
Indoor temp. sensor
Temp. sensor
Temp. sensor
Temp. sensor
Louver motor
Drain pump motor
Float switch
Drain control relay
Pulse motor valve
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY
PNK : PINK
ORN: ORANGE
BRW: BROWN
GRN: GREEN
1.
indicates the terminal bolock letter.
Letter at inside indicates the terminal number.
2. A dotted line and broken line indicate the wiring at site
3. indicates a control P.C. board.
9
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3. PARTS RATING
3-1. Parts Rating
Model
MMU-
AP0071MH
AP0091MH
AP0121MH
SWF-230-60-1R
MP24Z3N
AP0151MH
AP0181MH
Fan motor
Motor for horizontal grille
Pulse motor
EDM-MD12TF-3
Pulse motor valve
TA sensor
EDM-B25YGTF-3
Lead wire length : 155mm Vinyl tube
Ø4 size lead wire length : 1400mm Vinyl tube
EDM-B40YGTF-3
TC1 sensor
TC2 sensor
Ø6 size lead wire length : 1500mm Vinyl tube (Black)
Ø6 size lead wire length : 1400mm Vinyl tube (Red)
FS-0218-103
TCJ sensor
Float switch
Drain pump motor
ADP-1409
3-2. Name of Each Part
Earth screw
Air outlet/Air outlet flap
It is included in the electric parts box.
Select air blow direction in cooling or
heating operation each.
Clip
The clip is to open/close the air inlet grille.
Air filter
Removes dust and trash.
(Air filter is provided in the air grille.)
Air inlet grille
Air in the room is sucked from here.
10
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3-3. Parts Name of Remote Controller
Display section
In the display example, all indicators are displayed for the explanation.
In reality only, the selected contents are indicated.
CODE No.
SET DATA SETTING TEST
UNIT No.
Display
section
R.C.
No.
H
TEMP.
ON / OFF
• When turning on the leak breaker at the first time, [SET DATA] flashes on the
display part of the remote controller. While this display is flashing, the model is
being automatically confirmed. Accordingly, wait for a while after [SET DATA]
display has disappeared, and then use the remote controller.
TIMER SET
FAN
SWING/FIX
UNIT
MODE
VENT
Operation
section
TIME
FILTER
RESET TEST
SET CL
7 8 9
2
17
16
13
14
CODE No.
1
SET DATA
SETTING TEST
3
5
UNIT No.
10
4
6
R.C.
No.
H
11
12
15
1
2
3
SET DATA display
12
13
PRE-HEAT display
Displayed when the heating operation starts.
Displayed during setup of the timer.
While this indication is displayed, the indoor fan
stops.
Operation mode select display
The selected operation mode is displayed.
Operation ready display
CHECK display
Displayed when cooling or heating operation is
impossible because the outdoor temperature goes
out of the operable range.
Displayed while the protective device works or a
trouble occurs.
4
5
Timer time display
14
15
No function display
Time of the timer is displayed. (When a trouble
occurs, the check code is displayed.)
Displayed if there is no function even if the button is
pushed.
Timer SETIN setup display
Air volume select display
When pushing the Timer SET button, the display
of the timer is selected in order of
The selected air volume mode is displayed.
(AUTO)
(MED.)
(HIGH)
(LOW)
[OFF]
→ [ON]
→
[OFF] repeat OFF timer
→ No display.
16
17
Mode select control display
6
7
8
9
Filter display
Displayed when pushing “Operation mode select
button while the operation mode is fixed to heating
or cooling by the system manager of the air condi-
tioner.
”
If “FILTER
” is displayed, clean the air filter.
TEST run display
Displayed during a test run.
Central control display
Flap position display
Displayed when using the remote controller together
with the central control remote controller, etc.
If Remote controller is prohibited at the
Displays flap position.
SWING display
centralcontrol side,
flashes when operating
ON / OFF
MODE
Displayed during up/down movement of the flap.
,
,
/
buttons and
the change is not accepted.
10
11
Set up temperature display
(The contents available to be set up on the remote
controller differ according to the central control
mode. For details, refer to Owner’s Manual of the
central control remote controller.)
The selected set up temp. is displayed.
Remote controller sensor display
Displayed while the sensor of the remote
controller is used.
11
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Operation section
Push each button to select a desired operation.
This remote controller can operate the maximum 8 indoor units.
• The details of the operation needs to be set up once, afterward, the air conditioner can be used by pushing
ON / OFF
button only.
7
1
TEMP.
ON / OFF
8
10
2
TIMER SET
FAN
MODE
VENT
9
4
6
TIME
SWING/FIX
UNIT
FILTER
RESET TEST
SET CL
5
3
ON / OFF
1
2
Air volume select button
8
button
Selects the desired air volume mode.
When the button is pushed, the operation starts,
and it stops by pushing the button again.
Timer set button
When the operation has stopped, the operation
lamp and all the displays disappear.
TIMER SET button is used when the timer is set
up.
9
Operation select button
3
4
Check button
Selects desired operation mode.
The CHECK button is used for the check opera-
tion. During normal operation, do not use this
button.
10
Set up temperature button
Adjusts the room temperature.
Set the desired set temperature by pushing
Fan button
or
.
FAN button is used when a fan which is sold on
the market or etc. is connected.
OPTION :
5
6
Filter reset button
Resets (Erases) “FILTER
” display.
Remote controller sensor
Usually the TEMP. sensor of the indoor unit senses
the temperature.The temperature on the surround-
ing of the remote controller can also be sensed.
For details, contact the dealer from which you have
purchased the air conditioner.
Wind direction and Swing
UNIT
:
If the multiple indoor units are operated by only
one remote controller, select the units when the
air direction is adjusted.
• In case that one remote controller controls the
multiple indoor units, the setup operation is
unavailable in group control.
SWING/FIX
:
Set up the auto swing and angle of the flap.
7
Operation lamp
Lamp is lit during the operation. Lamp is off when
stopped.
Although it flashes when operating the protection
device or abnormal time.
12
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3-4. Correct Usage
When you use the air conditioner for the first time or when you change the SET DATA value, follow the proce-
dure below. From the next time, the operation displayed on the remote controller will start by pushing the
ON / OFF
button only.
Preparation
Turn on the main power switch and/or the leakage breaker.
• When the power supply is turned on, a partition line is displayed on the display part of the remote controller.
* After the power supply is turned on, the remote controller does not accept an operation for approx. 1 minute,
but it is not a failure.
REQUIREMENT
ON / OFF
• While using the air conditioner, operate it only with
switch and the leak breaker.
button without turning off the main power
TEMP.
ON / OFF
1
4
3
TIMER SET
FAN
SWING/FIX
UNIT
MODE
2
TIME
VENT
FILTER
RESET TEST
SET CL
ON / OFF
Cooling only model
1
2
Push
button.
The operation lamp goes on, and the operation starts.
DRY
COOL
FAN
MODE
Select an operation mode with the “MODE
” button.
One push of the button, and the display
changes in the order shown on the right.
Heat-pump model
• In HEAT
mode, if the room temperature reaches to
AUTO
HEAT
DRY
COOL
FAN
LOW
the set temperature, the outdoor unit stops and the air
flow becomes ULTRA LOW and the air volume decreases.
(Dehumidity)
• In the heating mode, the fan stops so that cool air is not discharged and Heat
is displayed.
FAN
3
4
Select air volume with “FAN
” button.
AUTO
HIGH
MED.
One push of the button, and the display
changes in the order shown on the right.
• When air volume is “AUTO
temp. and room temp.
”, air volume differs according to the temperature difference between set
• In DRY
mode, “AUTO
” is displayed and the air volume is LOW.
• In heating operation, if the room temperature is not heated sufficiently with VOLUME “LOW ” operation,
select “MED. ” or “HIGH ” operation.
Determine the set up temperature by pushing the “TEMP.
” or “TEMP.
” button.
Stop
Push
ON / OFF
button.
The operation lamp goes off, and the operation stops.
13
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3-5. Automatic Operation (Super Heat RecoveryType Only)
When you set the air conditioner in
mode or switch over from AUTO operation because of some settings
change, it will automatically select either cooling, heating, or fan only operation depending on the indoor tem-
perature.
TEMP.
ON / OFF
1
2
3
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
FILTER
RESET TEST
SET CL
Start
ON / OFF
1
button
Push this button to start the air conditioner.
2
3
Mode select button (MODE)
Select Auto.
Temperature button
Set the desired temperature.
• In case of cooling, start the operation after approx. 1 minute.
• In case of heating, the operation mode is selected in accordance with the room temperature and operation
starts after approximately 3 to 5 minutes.
• When you select the Auto mode, it is unnecessary to set the fan speed.
The FAN speed display will show AUTO and the fan speed will be automatically controlled.
• After the heating operation has stopped, FAN operation may continue for approx. 30 seconds.
• When the room temperature reaches the set temperature and the outdoor unit stops, the super low wind is
discharged and the air volume decreases excessively.
During defrost operation, the fan stops so that cool air is not discharged and “HEAT READY” is displayed.
• If the Auto mode is uncomfortable, you can select the desired conditions manually.
NOTE
When restarting the operation after stop
• When restarting the operation immediately after stop, the air conditioner does not operate for approx. 3
minutes to protect the machine.
Stop
ON / OFF
Push
button.
Push this button again to stop the air conditioner.
14
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3-6. TIMER Operation
A type of timer operation can be selected from the following three types.
OFF timer
Repeat OFF timer : Every time, the operation stops after the set time has passed.
ON timer :The operation starts when the time of timer has reached the set time.
:The operation stops when the time of timer has reached the set time.
Timer operation
TEMP.
ON / OFF
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
1
FILTER
RESET TEST
SET CL
2
3
4
1
2
Push TIMER SET button.
OFF
OFF
ON
• The timer display (type) changes for every
push of the button.
(OFF timer)
(Repeat OFF timer)
No display
(ON timer)
• SET DATA and timer time displays flash.
TIME
Push
to select “SET TIME”.
For every push of
button, the set time increases in the unit of 0.5 hr (30 minutes).
The maximum set time is 72.0 hr.
For every push of
button, the set time decreases in the unit of 0.5 hr (30 minutes).
The minimum set time is 0.5 hr.
3
Push SET button.
SETTING
•
display disappears and timer time display goes on.
(When ON timer is activated, timer time, ON timer
are displayed and other displays disappear.)
Cancel of timer operation
4
Push CL button.
• TIMER display disappears.
NOTICE
• When the operation stops after the timer reached the preset time, the Repeat OFF timer resumes the
ON / OFF
operation by pushing
set time.
button and stops the operation after the time of the timer has reached the
15
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3-7. Adjustment of Wind Direction
• While the air conditioner stops, the horizontal flap (Up/Down air direction adjustment plate) automati-
cally directs upward.
• While the air conditioner is in ready status for heating, the horizontal flap (Up/Down air direction
adjustment plate) directs upward. The swinging operation starts after heating ready status has been
cleared, but “SWING
” is displayed on the remote controller even if the status is ready to heating.
How to set up the air direction
Push SWING/FIX button during operation.
1
Every pushing the button, the air direction changes.
In Cooling / Dry operation
In Heating operation
Set the horizontal flap (Up/Down
air direction adjustment plate)
downward. If directing it upward,
the hot air may not come to the
foot come to the foot.
Set the horizontal flap (Up/Down
air direction adjustment plate)
upward. If directing it downward,
the dew may fall on near the air
air outlet port or it drips.
Initial setup
Initial setup
How to start swinging
2
Push SWING/FIX button.
Set direction of the horizontal flap (Up/Down air
direction adjustment plate) to the lowest position
and then push SWING/FIX button again.
TEMP.
ON / OFF
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
• [SWING
] is displayed and the air direction
automatically changes upward/downward.
In case when one remote controller controls the
multiple indoor units, each indoor unit can be se-
lected and its air direction can be set up.
FILTER
RESET TEST
SET CL
How to stop swinging
1, 2, 3
4
3
Push SWING/FIX button again during swinging of the
horizontal flap.
In FAN operation
In all modes
• The horizontal flap can be stopped at the desired
position. After then the air direction can be again set
up from the uppermost position by pushing SWING/FIX
button.
Series of
operation
* While the horizontal flap is set downward in cool-
ing/drying operation, it does not stop.
Initial setup
If stopping the horizontal flap which directs down-
ward during swinging, it stops after moving to the
Display when stopping the swing
3rd position from the top position.
UNIT
4
UNIT
• To set up the air direction individually, push
Fan/Heat
operation
Cool/Dry
operation
button to display each indoor unit No. in a group
control.Then set up the air direction to a displayed
indoor unit.
• If there is no display, all the indoor units can be
operated collectively.
UNIT
• Every pushing
button, the display exchanges
as shown in the figure.
No display
Unit No. 1-1
Unit No. 1-2
Unit No. 1-4
Unit No. 1-3
16
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3-8. Information
Confirmation before operation
Protective device (High pressure switch)
• Turn on the power switch 12 hours before starting
the operation.
This device stops automatically an operation when
excessive force is applied on the air conditioner.
• Make sure whether earth wire is connected.
If the protective device works, the operation stops
and the operation lamp flashes.
When the protective device works, the indication TEST
• Make sure the air filter is connected to the indoor
unit.
and the check code are displayed on the display
section of the remote controller. In the following
cases, the protective device may work.
Heating capacity
• A heat pump system which absorbs heat from
outside of the room and then discharges heat into
the room is adopted for heating. If the outside
temperature falls, the heating capacity decreases.
In cooling operation
• The suction port or discharge port of the outdoor
unit is closed.
• When the outside temperature is too low, it is
recommended to use this air conditioner together
with other heating equipment.
• A strong wind continuously blows to the discharge
port of the outdoor unit.
In heating operation
Defrost during heating operation
• Dust or waste adheres excessively to air filter of
the indoor unit.
• In heating operation, if there is frost on the outdoor
unit, the operation changes automatically to the
defrost operation (Approx. 2 to 10 minutes) to
increase the heating efficiency.
• The discharge port of the indoor unit is closed.
If the protective device works, turn off the main
power switch, solve the cause, and then start the
operation again.
• During defrost operation, the fan of the indoor unit
stops.
3-minutes protection
• When restarting the operation just after the
operation has been stopped or the main power
switch has turned on, the outdoor unit does not
work for approx. 3 minutes in order to protect the
air conditioner.
Cooling/Heating operation of Super
Modular Multi system air conditioner
• Although each indoor unit can be individually
controlled in the Super Modular Multi system air
conditioner, the cooling operation and the heating
operation cannot be simultaneously performed in
the multiple indoor units which are connected to
an outdoor unit.
Power failure
• If a power failure occurred during operation, all
operations stop.
• If the cooling operation and the heating operation
are simultaneously performed, the indoor unit
• When the power is returned after a power failure,
the operation lamp notifies the power-ON by
flashing operation lamp on the remote controller.
which executes cooling operation stops, and
the operation section lights up. On the other hand,
the indoor unit which executes heating operation
continues running. In a case that the manager of
the air conditioner has fixed the operation to
cooling or heating, an operation other than that set
up is unavailable. If an operation other than that
on
ON / OFF
• When restarting the operation, push
button again.
Fan rotation in stopped unit
• In heating operation even in the stopped indoor
unit, the fan rotates once for several minutes per
approx. an hour when the other indoor unit is
operating to protect the air conditioner.
set up is executed,
on the operation section
lights up and the operation stops.
Characteristics of heating operation
• The wind is not out just after starting an operation.
The hot wind starts to blow 3 to 5 minutes after
(Time differs according to indoor/outdoor tempera-
ture.) the indoor heat exchanger has warmed up.
• During operation, the outdoor unit may stop if the
outside temperature rises.
17
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3-9. Air Conditioner Operations and Performance
3 minutes protection function
3-minutes protection function prevents the air conditioner from starting for initial 3 minutes after the main power
switch/circuit breaker is turned on for re-starting the air conditioner.
Power failure
Power failure during operation will stop the unit completely.
• To restart the operation, push the START/STOP button on the remote controller.
• Lightning or a wireless car telephone operating nearby may cause the unit to malfunction. Turn off the main
power switch or circuit breaker and then turn them on again. Push the START/STOP button on the remote
controller to restart.
Heating characteristics
Preheating operation
The air conditioner will not deliver warm air immediately after it is turned on. Warm air will start to flow out after
approximately 5 minutes when the indoor heat exchanger warmed up.
Warm air control (In heating operation)
When the room temperature reaches the set temperature, the fan speed is automatically reduced to prevent to
blow cold draft. At this time, the outdoor unit will stop.
Defrosting operation
If the outdoor unit is frosted during the heating operation, defrosting starts automatically (for approximately
2 to 10 minutes) to maintain the heating capacity.
• The fans in both indoor and outdoor units will stop during the defrosting operation.
• During the defrosting operation, the defrosted water will be drained from the bottom plate of the outdoor unit.
Heating capacity
In the heating operation, the heat is absorbed from the outside and brought into the room. This way of heating
is called heat pump system. When the outside temperature is too low, it is recommended to use another heating
apparatus in combination with the air conditioner.
Attention to snowfall and freeze on the outdoor unit
• In snowy areas, the air inlet and air outlet of the outdoor unit are often covered with snow or frozen up.
If snow or freeze on the outdoor unit is left as it is, it may cause machine failure or poor warming.
• In cold areas, pay attention to the drain hose so that it perfectly drains water without water remaining inside for
freeze prevention. If water freezes in the drain hose or inside the outdoor unit, it may cause machine failure or
poor warming.
Air conditioner operating conditions
For proper performance, operate the air conditioner under the following temperature conditions:
Cooling operation Outdoor temperature : –5°C to 43°C
Room temperature : 21°C to 32°C (Dry valve temp.), 15°C to 24°C (Wet valve temp.)
Room relative humidity – less than 80 %. If the air conditioner operates
in excess of this figure, the surface of the air conditioner may cause dewing.
CAUTION
Dry operation
Outdoor temperature : 15°C to 43°C (Maximum suction air temp. 46°C)
Room temperature : 17°C to 32°C
Heating operation Outdoor temperature : –15°C to 15°C (Wet valve temp.)
Room temperature : 15°C to 28°C (Dry valve temp.)
If air conditioner is used outside of the above conditions, safety protection may work.
18
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3-10. When the Following Symptoms are Found
Check the points described below before asking repair servicing.
Symptom
Cause
Outdoor unit • White misty cold air
or water is out.
• Fan of the outdoor unit stops automatically and performs defrost
operation.
• Sometimes, noise
“Pushu !” is heard.
• Solenoid valve works when defrost operation starts or finishes.
Indoor unit
• “Swish” sound is
heard sometimes.
• When the operation has started, during the operation, or immediately
after the operation has stopped, a sound such as water flows may be
heard, and the operation sound may become larger for 2 or 3 minutes
immediately after the operation has started. They are flowing sound of
refrigerant or draining sound of dehumidifier.
• Slight “Pishi!” sound
is heard.
• This is sound generated when heat exchanger, etc. expand and
contract slightly due to change of temperature.
• Discharge air smells.
• Various smell such as one of wall, carpet, clothes, cigarette, or
cosmetics adhere to the air conditioner.
• The operation lamp
flashes
• Flashes when power is turned on again after power failure, or when
power switch is turned on.
• “STANDBY
indication is lit.
”
• When cooling operation cannot be performed because another indoor
unit performs heating operation.
• When the manager of the air conditioner has fixed the operation to
COOL or HEAT, and an operation contrary to the setup operation is
performed.
• When fan operation stopped to prevent discharge of hot air.
• Sound or cool air is
output from the
stand by indoor unit.
• Since refrigerant is flowed temporarily to prevent stay of oil or
refrigerant in the stand by indoor unit, sound of flowing refrigerant,
“Kyururu” or “Shaa” may be heard or white steam when other indoor
unit operates in HEAT mode, and cold air in COOL mode may be
blow-out.
• When power of the
air conditioner is
turned on, “Ticktock”
sound is heard.
• Sound is generated when the expansion valve operates when power
has been turned on.
Operates or stops automatically.
Does not operate.
• Is the timer “ON” or “OFF”?
• Is it a power failure?
• Is the power switch turned off?
• Is the power fuse or breaker blown?
• Has the protective device operated? (The operation lamp goes on.)
• Is the timer “ON”? (The operation lamp goes on.)
Silent
• Are COOL and HEAT selected simultaneously? (“STANDBY
indication is lit on the display column of the remote controller.)
”
Air is not cooled or warmed sufficiently.
It’s strange.
• Is the suction port or discharge port of the outdoor unit obstructed?
• Are any door or window open?
• Is the air filter clogged with dust?
• Is discharge flap of the indoor unit set at appropriate position?
• Is air selection set to “LOW” “MED.”, and is the operation mode set to
“FAN”?
• Is the setup temp. the appropriate temperature?
• Are COOL and HEAT selected simultaneously? (“STANDBY
indication is lit on the display column of the remote controller.)
”
When the following symptoms are found, stop the operation immediately, turn off the power switch, and contact
the dealer which you have purchased the air conditioner.
• Activation of switch is unstable.
• Fuse or breaker is blown periodically.
• Foreign matters or water entered by mistake.
• When if activation cause of the protective device has been removed, the operation is not performed.
• Other unusual status occurred.
19
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Accessory parts and Parts to be procured locally
r Accessory parts
1
PRECAUTIONS FOR SAFETY
• Ensure that all Local, National and International regulations are satisfied.
• Important safety information are described in this installation manual.
Please ensure this manual is read thoroughly and kept for future reference.
• After the installation work, perform a trial operation to check for any problem.
Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.
Part name
Q’ty
Shape
Usage
(Ensure hand over to customer)
Installation Manual
1
This manual
• Turn off the main power supply switch (or breaker) before any unit maintenance.
• Ask the customer to keep the Installation Manual together with the Owner’s Manual.
Heat insulating pipe
2
1
2
4
1
For heat insulation of the pipe connecting section
Installation pattern
Installation gauge
Pattern fixing screw
Heat insulator
——
For checking of ceiling opening and the main unit position
CAUTION
New Refrigerant Air Conditioner Installation
For positioning of the ceiling position
(To be used with the installation pattern)
• THIS AIR CONDITIONER FEATURES A NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DEPLETE OZONE LAYER.
The pressure of R410A is 1.6 times higher than that of former refrigerant R22. The refrigerating oil has also been
changed. Therefore be sure that any former refrigerant, refrigerant oil or any other contaminants do not enter the
refrigerating cycle of the air conditioner, during either installation or service work. If incorrect tools or operating
procedures are used, there is a possibility of a serious accident. Use only tools and materials that have been
designed to operate with R410A.
M5 × 16L
For attach the installation pattern
For heat insulation of drain connecting section
To prevent the risk of charging with an incorrect refrigerant, the dimensions of the charging port connections are different
to those used for conventional refrigerant. Therefore only tools designed to operate with R410A can be used.
For connecting pipes, use piping specifically designed for R410A.
During installation, ensure pipes are clean and ensure contaminants do not enter in the pipes as the system is
affected by impurities such as water, oxide scales, dirt, oil, etc. Do not use existing pipe work from previous
installation as this will cause problems due to pressure resistances and impurities within the pipe.
Washer
8
1
1
1
1
For hanging unit
Hose band
For connecting drain pipe
Flexible hose
Heat insulator A
Heat insulator B
For adjusting core-out of drain pipe
For sealing of wire connecting port
For sealing of wire connecting port
CAUTION
To Disconnect the Appliance from Main Power Supply.
This appliance must be connected to the main power supply by means of a switch with a contact separation of at
least 3 mm.
WARNING
• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.
Inappropriate installation may result in water leakage, electric shock or fire.
• Turn off the main power supply switch or breaker before attempting any electrical work.
Refrigerant piping
Make sure all power switches are off. Failure to do so may cause an electric shock.
• Connect all of the installation wiring correctly.
If the installation wiring is incorrect electrical parts may be damaged.
• Piping material used for the conventional refrigerant cannot be used.
• Use copper pipe only with a wall thickness of 0.8 mm or more for Ø6.4, Ø9.5, Ø12.7.
• Flare nut and flare operations are also different from those of the conventional refrigerant.
Use the flare nut fitted to the indoor unit of the air conditioner.
• During the transportation and installation of the air conditioning unit, ensure that gaseous matter
other than the specified refrigerant does not enter into the refrigeration cycle.
If a refrigerant becomes contaminated with foreign gases, the gas pressure within the refrigerant cycle will become
abnormally high and may result in the fracture of pipe work and possible human injury.
• Do not modify this unit by removing any of the safety guards or by overriding any of the safety
interlock switches.
• Exposure of the unit to water or other forms of moisture before installation may cause a short-circuit
of the electrical parts.
Do not store it in a wet basement or expose to rain or water.
• After unpacking the unit, examine for possible damage.
• Do not install in a place that might increase the vibration of the unit.
• To avoid personal injury (with sharp edges), be careful when handling parts.
• Perform installation work properly according to the Installation Manual.
Inappropriate installation may result in water leakage, electric shock or fire.
• When the air conditioner is installed in a small room, provide appropriate measures to ensure that in
the event of a refrigerant leak the rooms does not exceed the critical level.
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1
PRECAUTIONS FOR SAFETY
Installation space
• Install the air conditioner securely in a location where the base can sustain the weight of the unit
adequately.
Ensure there is sufficient space to install the unit and to perform maintenance work as and when required.
Keep 15mm or more for clearance between top plate of the indoor unit and the ceiling surface.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the unit falling.
Installation space
• If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gases may be generated.
• After the installation work, confirm that refrigerant gas does not leak.
1000 or more
1000 or more
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gases may be
generated.
• Electrical work must be performed by a qualified electrician in accordance with the Installation
Manual. Ensure the power supply to the air conditioner is exclusive to that unit only.
An insufficient power supply capacity or inappropriate installation may cause fire.
• Use only the specified wiring during the unit installation. Ensure that all terminals are securely fixed,
so preventing any external forces having a negative effect on the terminals.
Obstacle
• Conform to the regulations of the local electric authority when wiring the power supply.
Inappropriate grounding may cause an electric shock.
• Do not install the air conditioner in a location that may be subjected to a risk of exposure to a
combustible gas.
Ceiling height
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.
Model MMU-AP
0071 to 0121 type
0151 to 0181 type
Installable ceiling height
Up to 2.7 m
Up to 3.5 m
2
SELECTION OF INSTALLATION PLACE
When the ceiling height exceeds the standard distance of a 4-way air discharge cassette as detailed in the following
table. The air-flow may not be sufficient to heat the room. It is therefore necessary to set the unit to high ceiling
mode or adjust the direction of the ceiling discharge.
WARNING
For setup of the high ceiling mode, refer to the details of Applicable controls “To incorporate a filter sold separately”
and “In case of installation to high ceiling” within this Manual.
• The air conditioner must be installed in a location that can support the weight of the unit effectively.
If the unit is not installed on a foundation that can support its weight effectively, the unit may fall down, resulting in
possible human injury.
Installable ceiling height list
• Where required ensure that the units installation is sufficient enough to withstand against an earthquake.
An insufficient installation could result in the unit falling, causing possible human injury.
Indoor unit capacity type
Discharge direction
Standard (At shipment)
High ceiling (2)
0071 to 0121 type
0151 type
0181 type
Setup of high ceiling
• Install the air conditioner at a minimum height of 2.5 m from the floor.
Do not insert your hands or others into the unit while the air conditioner is operating.
4-way 3-way 2-way 4-way 3-way 2-way 4-way 3-way 2-way
Setup data
0000
2.7
—
—
—
—
—
—
—
2.9
3.2
3.5
—
—
—
—
—
—
3.2
3.4
3.5
—
—
—
—
—
—
CAUTION
0002
Upon approval from the customer, install the air conditioner in a place that satisfies the following
conditions.
High ceiling (3)
—
0003
• A place where the unit can be installed horizontally.
• A place where a sufficient servicing space can be maintained for safety maintenance and unit check.
• A place where the drain water can be exited from the unit, without causing a problem.
(Unit: m)
REQUIREMENT
Avoid installing in the following places.
• When high ceiling (1) or (3) is used with 4-way blowing, a draft is easily recognized due to drop of discharge
temperature.
• Places exposed to air with a high salt content (seaside area), or places exposed to large quantities of sulfide gas
(hot spring). (Should the unit be used in these places, special protective measures are needed.)
• Places exposed to oil, vapor, oil smoke or corrosive gas.
• Places where organic solvent is used nearby.
• Places close to a machine generating high frequency.
• Places where the discharged air blows directly into the window of the neighbouring house. (For outdoor unit)
• Places where the noise from the outdoor unit can be easily transmitted to the neighboring property.
(When installing the air conditioner on the boundary with a neighbor, pay due attention to the level of noise.)
The air filter cleaning signal duration (Notification of filter cleaning) on the remote controller can be changed
according to the condition of installation.
If the room is not heated due to the installation place or construction of the room, the detection temperature of
heating can be raised.
For setup method, refer to “Change of lighting term of filter sign” and “Increased heating effect” in the Applicable
controls of this Manual.
• Places with poor ventilation.
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2
SELECTION OF INSTALLATION PLACE
Dimensional view
In case of wireless type
The wireless remote controller can be operated up to a
maximum of 8 m from the infra-red receiver.
200
Therefore ensure that the remote controller will be
mounted and used within this stated parameter.
595 to 660 Ceiling open dimension
1000 or more
Check port
• To prevent malfunction do not mount or operate in a
location that is subjected to either a fluorescent lamp
or direct sunlight.
(
450)
Check port
450)
(
Check port
(
450)
• A maximum of 6 indoor units with wireless remote
controller can be installed within the same room.
Obstacle
Drain-up standing-up size
300 or less
1000 or more
Indoor unit
Ceiling
Note)
As ABS is used for the drain discharge port of the main unit,
the vinyl chloride paste cannot be used.
Space required for
installation and servicing
Use the flexible hose (Band fix) included in the package.
4
3
INSTALLATION OF INDOOR UNIT
•
Wired remote
controller
(RBC-AMT31E)
WARNING
The installation of the air conditioning unit must be positioned in a location that can sufficiently support its weight
and give protection against adverse environmental conditions.
16
120
142
64
368.5
Failure to do so may result in unit damage and possible human injury.
Any incomplete installation may also cause possible risk of human injury.
268
27
Knockout for 100 diameter
fresh air intake
220.5
145.5
93
700 Panel external dimension
595 to 660 Ceiling open dimension
525 Hanging bolt pitch
Drain discharge port
• Unpack the package, take out the product and then place it on the floor so that the same surface directs
underneath as it is placed in the package.
145.5
Bottom face
of ceiling
Bottom face
134
63
Hanging bolt
M10 or W3/8
local arrange
of ceiling
• Never put the products taken out from the packing box in a
pile, or put other load on them; otherwise there is a
105 70
Ceiling panel
OK
NO GOOD
possibility to damage electric parts, fan parts, draining
mechanism, and etc.
If the both sides are turned over, a deformation of mounting
metal of the ceiling panel which is sold separately, etc may
be caused. Accordingly the product may be damaged and
the installation becomes impossible in some cases.
Ø162
REQUIREMENT
Strictly comply to the following rules to prevent damage of the indoor units and human injury.
• Do not place heavy objects on the indoor unit. (Even when units are still packaged)
• Always carry the unit as packaged from the factory wherever possible.
Ø162
Wiring connection
port
Refrigerant pipe
(Liquid) Ø6.4
320.5
Electric parts box
4 screw holes
(For 4 mm tapping screw)
55
If carrying in the indoor unit unpacked by necessity, be sure to use buffering cloth, etc. to prevent damaging
the unit.
70 105 93
139.5
For 150 diameter
branch duct
knockout square hole
575 Unit external dimension
For 150 diameter
branch duct knockout
square hole
• To move the indoor unit, hold the hanging brackets (4 positions) only.
190.5
Refrigerant pipe (Gas)
0151, 0181MH : Ø12.7
0071 to 0121MH : Ø9.5
Do not apply force to other parts (refrigerant pipe, drain pan, foamed parts, or resin parts etc.).
• To be carried by two or more persons. Do not strap the unit in positions other than that stated.
Bottom face of ceiling
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3
INSTALLATION OF INDOOR UNIT
(1)
Ceiling opening and installation of hanging bolts
Installation of indoor unit
Hanging bolt
(W3/8 or M10)
M10 flat washer
(Accessory)
• Evaluate and determine the piping and wiring requirements inside the ceiling prior to the hanging of the unit.
• Attach the nut (M10 or W3/8: Procured locally) and washer (Ø34 mm)
to the hanging bolt.
Nut
(2)
• After installation place of the indoor unit has been determined, create opening in ceiling and install the hanging
bolts.
(W3/8 or M10)
M10 flat washer
(Accessory)
• Put washers at either side of the T-groove on the hanging bracket of
the indoor unit in order to hang the unit.
Nut
(W3/8 or M10)
• For the ceiling opening size and pitch for hanging bolts refer to the dimensional drawing and the supplied
installation pattern.
• Using a spirit level, check that all four sides are horizontal.
(Horizontal positioned within 5 mm)
(1) M10 washer supplied, all other material
must be procured locally.
(2) To ensure that the unit is mounted safely, the
hanging bolt must be positioned just below
the hanging bracket as shown in the diagram.
• Once the ceiling void has been created, ensure that the drain pipe, refrigerant pipes, inter-connecting wires and all
control wires are in place prior to installing the actual indoor unit.
• Cut off the installation gauge from the installation pattern.
Please procure the hanging bolts and nuts for installation of the indoor unit at local site.
• Using the installation gauge check and adjust clearance between the
indoor unit and the ceiling opening (1) (10 to 42 mm on each side).
Ensure that the unit is level to the ceiling and within a distance of (2)
23 mm to 28 mm below.
Hanging bolt
Nut
M10 or W3/8
M10 or W3/8
4 pieces
12 pieces
The installation gauge has details of how to use printed on it.
Note) Install the indoor unit so that the end part of opening does not
come into contact with the drain socket piping.
How to use the supplied installation pattern
The installation pattern is enclosed within the packaging of the air conditioner.
Indoor unit
Level vial (Horizontal: within 5 mm)
Indoor unit
Hanging bolt
Existing ceiling void
Indoor unit
Use the pattern to determine the position and size of the opening and
location of the hanging bolts.
Hanging
metal
23 to 28 mm (1)
1) 23 to 28 mm
Ceiling panel
New ceiling void
10 to 42 mm (2)
Installation gauge 2) 10 to 42 mm
Use the pattern to determine the position of the new ceiling opening.
Installation gauge
Ceiling board
Cut off slit section of the main unit of the installation pattern.
Cut off the outside of the pattern according to size of the ceiling
opening. (There is a slit on the standard opening size section.)
Installation pattern Cut off the installation
REQUIREMENT
(Attached)
pattern along slit of
the main unit.
Installation of ceiling panel
(Sold separately)
• Install the indoor unit after installation of the hanging bolts.
Before installation of the indoor unit be sure to
remove the transportation cushion found between
the fan and the bell mouth.
Running the unit without removing the cushion
may damage the fan motor.
M5 × 16L screws (Attached)
• Using the supplied pattern attach it to the indoor unit using the
supplied fixing screws (M5 × 16L 4off). (Screw pattern to the ceiling
panel hanging brackets of the indoor unit)
Install the ceiling panel after completion of the
installation of the indoor unit, including all piping and
wiring.
These screws are exclusive to the
installation pattern. When installing
the ceiling panel, the other exclusive
screws attached to the ceiling panel
(sold separately) are used.)
• When creating the opening ensure it is as per the outer dimensions
of the supplied pattern.
Install the ceiling panel as per the supplied Installation
Manual.
Check the installation dimensions of the indoor unit
and the ceiling opening are correct and then install.
Treatment of ceiling
The ceiling differs according to the structure of the building. For details, consult your architect.
REQUIREMENT
In the process after the ceiling panels have been removed, it is important to reinforce the ceiling construction and
ensure the ceiling remains in a horizontal position. This is to prevent possible vibration of the ceiling panels.
Ensure the ceiling panel is mated to the ceiling
surface or the indoor unit.
1. Cut and remove the ceiling material.
2. Reinforce the cut surface of the ceiling construction and add support for fixing the end of ceiling panel.
If the panel and unit are not mated together this
may result in the formation of dew condensation
causing a possible water leak.
Installation of hanging bolt
Use M10 hanging bolts (4 off, locally procured).
First remove the 4 corner caps from the ceiling
panel and fit to the indoor unit.
Be sure to remove the cushion for transportation
between the fan and the bell mouth.
When mounting the unit, set the pitch of the hanging bolts according to the size of the unit as detailed on the
dimensional drawing.
New concrete slab
Steel flame structure
Existing concrete slab
Installation of remote controller (Sold separately)
Install the bolts with insert brackets or anchor
bolts.
Use existing angles or install new
support angles.
Use a hole-in anchors, hole-in
plugs, or a hole-in bolts.
For installation of the wired remote controller, follow the Installation Manual supplied with the remote controller.
• Do not expose remote controller to direct sunlight or excessive heat.
Hanging bolt
Reinforcing
steel
• When using a wireless type remote controller check receiver on the indoor unit receives a signal.
Anchor bolt
(Pipe hanging
anchor bolt)
(Blade type
bracket)
(Slide type
bracket)
• For a wireless type controller ensure that it is used and mounted a minimum distance of 1m apart from any other
electrical devices (TV, Stereo, etc). As this may cause interference with the devices.
Hanging bolt
Support angle
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4
DRAIN PIPING WORK
Pipe material/Insulator and size
Connection of drain pipe
Check the draining
CAUTION
The following materials for piping work and insulation
are to be procured locally.
• Connect the hard socket (Procured locally) to the
hard socket side of the supplied flexible hose which
has been installed.
After completion of drain piping,
• Install the drain piping so that the water
drains effectively.
Check water drains away and that no water leaks from
any of the connecting parts. At the same time check
for any abnormal sounds from the drain pump.
Hard vinyl chloride pipe socket for VP25
• Apply heat insulation to prevent dew
condensation from forming.
• Connect the drain pipes (Procured locally) in turn to
the connected hard sockets.
Pipe material
Hard vinyl chloride pipe VP25
(Outer diameter Ø32 mm)
Ensure drainage is checked during cooling mode.
• Incorrectly installed pipe work may result
in a water leak.
Foamed polyethylene foam, thickness:
10 mm or more
When the electric work has finished:
REQUIREMENT
Insulator
• Before installing the ceiling panel, pour water as
shown in the following figure, check water drains
from the drain pipe connecting port (Transparent) in
COOL mode and then check there are no water
leaks from the drain pipes.
• Using an adhesive agent for vinyl chloride,
connect the hard vinyl chloride pipes so that
water does not leak.
REQUIREMENT
1.5m to 2m
Support
bracket
• Allow sufficient time for the adhesive to set and
harden. (Refer to the instructions of the
adhesive.)
• Ensure insulating of the drain pipes and connecting parts on the indoor units.
• The drain pipe should have a downward slope of at least 1/100 and ensure
there are no swells or blockages as this will cause abnormal sounds.
When the electric work has not finished:
1/100 or more
downward
Heat
insulator
• Pull out the float switch connector (3P: Red) from
P.C. board connector (CN34: Red) of the electric
parts box. (Ensure the power is turned off.)
• The maximum traverse length of drain pipe is 20 m. Provide support
brackets at intervals of 1.5 to 2 m where necessary to prevent movement.
Arched
shape
NO
GOOD
• Install the combined piping as shown in the illustration.
• Do not create an air purge in the pipework,
as the water would leak from this point.
Drain up
• Connect the single-phase 220-240V, 1N, 50Hz (or
220V, 1N, 60Hz) power to the terminal blocks R (L)
and S (N). (Never apply 220-240V to (A), (B), (U1)
and (U2).)
Trap
VP25
When it is not possible to achieve a natural downward
slope on the drain pipe, you can create a vertical lift
(Drain up) on the pipe.
As long as possible (10cm)
VP25
VP25
• Set the height of the drain pipe within 850 mm from
the bottom surface of the ceiling.
(Collective pipes)
• Pour water referring to the next page figure.
(Amount: 1500 cc to 2000 cc)
• The drain pipe should be piped from the drain pipe
connecting port horizontally for a maximum of
300 mm and then piped vertically.
• When the power is turned on, the drain pump motor
drives automatically. Check water is drained from
the drain pipe connecting port (Transparent), and
then check there is no water leak from the drain
pipes.
VP30 or more
Downward slope
1/100 or more
• The hard vinyl-chloride pipe cannot be connected
directly to the drain pipe connecting port of the indoor unit.
For connection with the drain pipe connecting port,
ensure that the supplied flexible hose is fitted.
Drain pipe connecting port
(Hard socket)
VP25 vinyl chloride pipe
(Procured locally)
Attached flexible hose
• After piping the vertical lift, ensure the pipe work is
set to a downward gradient.
Attached hose band
• After checking for water leaks on the drain, turn off
the power supply, and re-attach the float switch
connector to the original position (CN34) on the P.C.
board and refit the electric parts box.
• Adhesive agent cannot be used for the pipe
connecting port (hard socket) on the indoor unit.
Be sure to use the supplied hose band for fixing,
otherwise there is a risk of damage or water
leakage from the drain pipe connecting port.
Soft socket
Hard socket
Socket for VP25
(Procured locally)
Adhesive agent prohibited
220–240V, 1N ~, 50Hz
NO GOOD
220V 1N ~, 60Hz
max
45˚
Connection of flexible hose
R(L) S(N)
White
• Insert the soft socket of the supplied flexible hose
into the connecting port of the drain pipe.
Riser (Trap)
300mm
or less
OK
CN34
(RED)
Red
Black
• Align the supplied hose band to the pipe connecting
port end, and tighten.
Pull out connector CN34 (Red) from P.C. board.
Black
max
45˚
90˚ Bend
Indoor unit
Underneath of ceiling
REQUIREMENT
Align the attached hose band to the
end of hose, set the tightening
Drain pipe
connecting port
(Transparent)
position upward, and then tighten it.
• Fix the soft socket with the supplied hose
band, tighten at the upper position of the
unit.
Flexible hose VP25 vinyl chloride pipe
(Accessory)
(To be local procure)
• The supplied flexible hose can bend up to
a maximum of 45°
Socket for VP25 vinyl chloride pipe
(To be local procure)
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4
DRAIN PIPING WORK
5
REFRIGERANT PIPING
Thermal insulating process
WARNING
• After checking of the draining, using the supplied thermal insulation fit to the flexible hose leaving no clearance at
the connecting port of the indoor unit.
• If refrigerant gas leaks during the installation work, ventilate the room immediately.
• If the leaked refrigerant comes in contact with fire, noxious gas may generate.
• Fit locally procured thermal insulation to the drain pipe leaving no clearance between the supplied insulation.
• After the installation work, confirm that refrigerant does not leak.
• If refrigerant gas leaks into the room and flows near to a source of fire, noxious gas may be generated.
Hose band
Flexible hose
CAUTION
REQUIREMENT
When using long length of refrigerant piping. Provide support brackets at intervals of 2.5 m to 3 m.
If the pipes are not fixed abnormal sounds may be generated.
Ensure water is poured slowly.
To reduce risk of water spreading throughout the
unit, resulting in a possible fault.
Ensure the supplied R410A flare nuts are used.
Heat insulator to be
Attached heat insulator
procured locally
Hard vinyl chloride pipe
Permissible pipe length and permissible height difference
This differs depending on the outdoor units. For details, refer to the Installation Manual supplied with the outdoor
unit.
Air
discharge area
Piping material and dimensions
Drain pan
Piping material
Phosphor deoxidization seamless pipe for air conditioner
Indoor unit capacity type MMU-
AP0071 to AP0121 type
AP0151 to AP0181 type
Gas side
Pipe size (mm)
Ø9.5
Ø6.4
Ø12.7
Ø6.4
Liquid side
• Use new and clean pipe, ensuring that the pipes are not contaminated with dust, oil, moisture, etc.
Check panel
Pipe flaring
• Flaring diam. meter size :
Flaring
A
Insert the leading part of the
hose between the heat
exchanger and the drain pan,
and then bend it downward.
A (Unit : mm)
1. Cut the pipe with a pipe cutter.
OK
NO GOOD
Obliquity Roughness
+0
A
-
0.4
Outer diam. of copper pipe
Warp
90˚
R410A
9.1
6.4
9.5
13.2
16.6
19.7
Polyethylene hand pump for
pouring water in drain pan
12.7
15.9
2. Place flare nut onto the pipe, and flare the pipe.
(Use the flare nut fitted to the unit or one that is
R410A compatible)
Vessel
Water (1500cc to 2000cc)
In case of flaring for R410A with the conventional
flare tool, make a margin of 0.5 mm longer than that
of R22 pipe so that the flare size matches with the
specified size.
*
As the flaring sizes of R410A differ from that used
on R22. It is recommended to use a dedicated
R410A flaring tool. However a conventional flare
tool can be used, by adjustment of the projection of
the copper pipe.
The copper pipe gauge is useful for adjusting the
projection margin size.
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5
REFRIGERANT PIPING
6
ELECTRIC WORK
B
• Projection margin in flaring :
B (Unit : mm)
Airtight test/Air purge, etc.
WARNING
For carrying out airtight test, air purge, gas leak check
and addition of refrigerant refer to the Installation
Manual supplied with the outdoor unit.
1. Using the specified wires, ensure the wires are connected and securely fixed so that no
external force can transmit to the connecting part of the terminals.
Rigid (Clutch type)
Poor connection may cause risk of fire, etc.
2. Ensure connection of earth wire. (Grounding work)
R410A tool used
Outer diam. of
Conventional tool used
R410A R22
Open fully valves of the outdoor unit
Do not connect the earth wire to a gas pipe, mains water pipe, lightning rod, or the earth wire of a telephone.
Incorrect earthing will cause risk of an electric shock.
copper pipe
R410A
R22
6.4
9.5
0 to 0.5 (Same as left) 1.0 to 1.5 0.5 to 1.0
0 to 0.5 (Same as left) 1.0 to 1.5 0.5 to 1.0
0 to 0.5 (Same as left) 1.0 to 1.5 0.5 to 1.0
0 to 0.5 (Same as left) 1.0 to 1.5 0.5 to 1.0
3. For electrical installation work, strictly follow the Local and national Regulations of each
country and the Installation Manual. A designated power supply must be used.
Gas leak check
Using a leak detector or soapy water, check for gas
leaks at the connecting pipe work and the caps on the
service valves.
Capacity shortage of the power supply or incomplete installation may cause an electric shock or a fire.
12.7
15.9
CAUTION
REQUIREMENT
Imperial (Wing nut type)
Use a leak detector designed specifically for HFC
refrigerant (R410A, R134a, etc.).
Ensure an earth leakage breaker is installed.
Outer diam. of copper pipe
R410A
R22
Failure to install, may result in an electric shock.
6.4
9.5
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
2.0 to 2.5
1.0 to 1.5
1.0 to 1.5
1.5 to 2.0
1.5 to 2.0
12.7
15.9
Heat insulating process
REQUIREMENT
• For power supply wiring, strictly conform to the Local authorities in each country.
Fit heat insulation to the gas and liquid pipes
separately.
• For wiring of the power supply of the outdoor units, follow to the outdoor unit Installation Manual.
• Never connect 220–240V control wiring to the terminal blocks (U1, U2, A, B) fault will be. (Caused.)
During cooling mode, the temperature of the liquid and
the gas pipes are reduced. Therefore ensure sufficient
insulation is fitted to prevent dew condensation.
Connection of refrigerant pipe
• Arrange the electrical wiring so that they do not come into contact with high-temperature parts of the pipe
work; this is to prevent the risk of insulation melting and causing a possible accident.
Connect all the refrigerant pipes with the flare
connection method
• On the gas side ensure that the heat insulation used
is heat resistant to a minimum temperature of 120°C
• After connecting wires to the terminal block. Secure wiring with cable clamp.
• Store wiring install control wiring and refrigerant piping within the same line.
• Do not turn on power of the indoor unit until vacuuming of the refrigerant pipe has finished.
• As the unit is sealed to atmospheric pressure.
It is not abnormal that no “Push....” sound will be
heard upon the removal of the flare nut.
• Using the supplied heat insulation. Insulate the
interconnecting parts of the indoor unit, ensuring that
there is no exposure of any refrigerant pipe work.
As detailed in the illustration below.
• Ensure use of two spanners for the connecting of the
pipe work to the indoor unit.
REQUIREMENT
Apply the thermal insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe. (The pipe exposed to
the outside causes water leak.)
Work using double spanner
Set notching upward.
• Refer to the following table for tightening torque.
Connecting pipe Tightening torque
Re-tightening
torque (N•m)
outer dia. (mm)
(N•m)
Pipe side
(Required at the site)
14 to 18
(1.4 to 1.8 kgf•m)
18
Main unit
Ø6.4
(1.8 kgf•m)
Attached heat insulating pipe
33 to 42
(3.3 to 4.2 kgf•m)
42
Ø9.5
Ø12.7
Ø15.9
(4.2 kgf•m)
50 to 62
(5.0 to 6.2 kgf•m)
50
(5.0 kgf•m)
68 to 82
(6.8 to 8.2 kgf•m)
68
(6.8 kgf•m)
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6
ELECTRIC WORK
Power supply specifications
Cable connection
Power supply wiring and communication wiring are to be procured locally.
REQUIREMENT
For the power supply specification, follow the table below. Ensure power supply is adequate. An insufficient power
supply could result in unit failure.
• Be sure to locate the cable through the cable connection port of the indoor unit.
For specification of the power capacity of the outdoor unit and the power supply wires, refer to the Installation
Manual supplied with the outdoor unit.
• Ensure additional wire length of approximately 100 mm at the indoor unit electric parts box.
This is to enable ease of any service work in the future.
• The low-voltage circuit is provided for the remote controller.
220–240V, 1N ~ 50Hz
Power supply
220V, 1N ~ 60Hz
Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for indoor
Indoor unit power supply (*1) units should be selected by the accommodated total current values of the indoor units.
• Remove the cover of the electric parts box by removing the mounting screws (3 pcs.) and push the hooking
section. (The cover of the electric parts box remains hanged to the hinge.)
20 m or less
50 m or less
Q’ty
Twist wire : 2.5 mm²
Twist wire : 3.5 mm²
2
• Tighten the screws on the terminal block and secure the cables with cord clamp fitted to the electric parts box.
(Do not apply tension to the connecting section of the terminal block.)
Power supply wiring
• Using the supplied thermal insulation for the sealing of the cable connecting port, seal the cable connecting port.
(Otherwise dew condensation may be caused.)
Indoor/Outdoor inter-unit wiring (*2)
(Up to 1000 m) Twist wire : 1.25 mm²
(Up to 2000 m) Twist wire : 2.00 mm²
Wire size
Q’ty
• Mount the cover of the electric parts box ensuring the cables are not pinched.
(Mount the cover after the ceiling panel has been wired to the electric box.)
2
Communication line
Central control line wiring (*3)
Remote controller wiring (*4)
(Up to 1000 m) Twist wire : 1.25 mm²
(Up to 2000 m) Twist wire : 2.00 mm²
Wire size
Q’ty
2
Wire size
Twist wire : 0.5 to 2.0 mm²
Indoor unit power supply (*1)
Screws
• Indoor unit power supply, must have a dedicated supply and be separate to that of the outdoor unit.
Electric parts box
• Arrange the power supplies to the indoor and outdoor units, so that a common earth leakage breaker and main
switch can be used.
P.C. board
• Power supply cable specification : Cable 3-core 2.5 mm², in conformity with Design 60245 IEC 57.
Screw
Cover of electric parts box
Indoor/Outdoor inter-unit wiring, Central controller wiring
(*2) (*3)
• Use a 2 core non polarity cable.
Hooking section
• To prevent any possible noise issues, use a shielded 2 core wire.
• The total stated length of communication wiring is determined by the interconnecting length of indoor to outdoor
cable plus the length of the central control communication cable.
Indoor/Outdoor
crossover cable/
Remote controller
terminal block
Remote controller wiring
(*4)
Thermal insulation to cabling connecting port
• For wiring remote controllers, a 2 core polarity cable must be used.
U1
U2
A
B
R
S
CAUTION
(L) (N)
Remote controller wiring, remote
Twist wire: 0.5mm2 to 2.0 mm2 × 2
controller inter-unit wiring
The remote controller wire
(Communication line) and AC220–
240V (Power supply) wires cannot
be parallel to contact each other
and cannot be stored in the same
conduits. If doing so, a trouble
may be caused on the control
system due to noise, etc.
Adhered surface
Power supply
terminal block
Total wire length of remote controller
wiring and remote controller inter-unit
wiring = L + L1 + L2 + … Ln
In case of wired type only
In case of wireless type included Up to 400 m
Up to 200 m
Up to 500 m
R(L) S(N)
Heat insulator A
Earth line
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln
Connecting
cord
Notched section
Cord clamp
Heat insulator B
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Remote
controller
wiring
L1
L2
Ln
(Max. 8 units)
Remote
controller
Remote controller inter-unit wiring
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6
ELECTRIC WORK
7
APPLICABLE CONTROLS
Remote controller wiring
NOTIFICATION
• Strip approximately 14 mm of insulation off of the connecting wires.
When using the equipment for the first time, the remote controller will not accept any commands for a short
period of time.
• As the remote controller wire has no polarity, there is no problem if connections to indoor unit terminal blocks A
and B are reversed.
• Automatic address
• While automatic addressing no operations can be performed on the remote controller.
• Automatic addressing will take a maximum duration of 10 minutes (generally 5 minutes).
Wiring diagram
Terminal block for remote controller
Terminal block
wiring of indoor unit
• Upon turning on the unit after completion of automatic addressing, a maximum period of
10 minutes (generally 3 minutes) are required prior to the start up operation of the outdoor unit.
A
B
A
B
Remote
controller unit
Remote controller wire (Field supply)
All indoor units are shipped from factory as standard. Change if necessary.
To change the setup use the main remote controller (wired remote controller).
* The setup change for wireless remote controller, sub remote controller or a unit without a controller (Centrally
controlled.) is not possible. In such cases, temporarily install a separate main remote controller.
Wiring between indoor and outdoor units
Outdoor power supply
Outdoor power supply
NOTE
An outdoor unit that is
inter-connected to the
indoor units automatically
becomes the header unit.
Header outdoor unit
U1U2U3U4U5U6
Follower outdoor unit
CODE No.
Applicable control setup
UNIT No.
U1U2U3U4U5U6
R.C.
No.
Earth
Earth
Basic operation procedure for setup change
TEMP.
ON / OFF
3
2
5
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
Change the setup while operation of the equipment is stopped.
(Be sure to stop the operation of a set.)
6
1
6
Control wiring between outdoor units
FILTER
RESET TEST
SET CL
Control wiring between indoor and outdoor units
Connection of shield wire closed terminal
Control wiring between indoor units
Procedure
Description
SET
CL
Indoor unit
Earth
Indoor unit
Indoor unit
Earth
Indoor unit
Push the
,
and TEST buttons simultaneously for 4 seconds or more, after a while, the display part flashes
as shown in the figure.
Check that the displayed item code is [10].
Earth
Earth
L
N
U1U2
A
A
B
B
L
N
U1U2
A
A
B
B
L
N
U1U2
A
A
B
B
L
N
U1U2
A
B
CODE No.
• If the item code indicates any characters other than [10], push the TEST
button to erase the display and retry the operation from the first step.
(For some time after the TEST button has been pushed, the operation
of the remote controller cannot be accepted.)
SETTING
∗
UNIT No.
1
R.C.
No.
(In a group control, the firstly displayed
indoor unit No. becomes the center unit.)
Indoor power supply
220-240V, 1N ~50Hz
220V, 1N ~60Hz
(* The display changes according
to the indoor unit model.)
Remote
controller
Remote
controller
Remote controller
[Group control]
UNIT
Each time the
button is pushed, the indoor unit No. in the group control is displayed consecutively.
Select the indoor unit that requires a change to the setup.
During this time the indoor unit that is selected can be
confirmed as the louver and fan will be operated.
Earth leakage
Pull box
Pull box
Pull box
2
breaker
Power switch
CODE No.
TEMP.
the buttons, select the item code [**].
Using
UNIT No.
3
4
∗∗
∗∗ ∗∗
∗∗∗∗
R.C.
No.
TIME
buttons, select set data [****].
Using the
Address setup
SET
Push the
button. During this time, if the display changes from flashing to permanently on, the setup is
Set up the addresses as per the Installation Manual
supplied with the outdoor unit.
complete.
• To change the setup of an indoor unit that is not selected, restart operation from Procedure 2.
5
6
• To change to a different setup within the selected indoor unit, restart operation from Procedure 3.
CL
Pushing the
button clears the set up contents which has been set. In this case, restart from Procedure 2.
Wiring on the ceiling panel
When the setup is finished, push the TEST button. (The setup is configured.)
Pushing the TEST button deletes the display and returns the status to the
normal stopped status.
As per the Installation Manual of the ceiling panel,
connect the connector (2P: Red) of the ceiling panel to
the connector (5P: White) onto the P.C. board within
the electric parts box.
(For a period of time after the TEST button has been pushed, the remote
controller will not accept any commands.)
5P connector (White)
Cord Clamp
Wire from ceiling panel
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7
APPLICABLE CONTROLS
In case of installation to high ceiling
Change of lighting time of filter sign
Group control
When the unit is to be installed at a height that exceeds the standard value, adjustment to the air volume is
necessary.
Depending on the conditions of the installation, the
time period of the filter clean sign can be changed.
In a group control, a remote controller can control up
to a maximum of 8 units.
• For the “Setup data” in Procedure 2 , select from the “Installable ceiling height list”.
Follow to the basic operation procedure
(1 → 2 → 3 → 4 → 5 → 6 ).
• For the item code in Procedure 3 , specify [01].
• For the [Set data] in Procedure 4 , select the setup
data of filter sign lighting time from the following
table.
• For cabling procedure and cables of the individual
line (Identical refrigerant line) system, refer to
“Electric work” in this Manual.
Installable ceiling height list
• Wiring between indoor units in a group is performed
in the following method.
Indoor unit capacity type
Discharge direction
Standard (At shipment)
High ceiling (2)
0071 to 0121 type
0151 type
0181 type
Setup of high ceiling
4-way 3-way 2-way 4-way 3-way 2-way 4-way 3-way 2-way
Setup data
0000
Connect the indoor units by connecting the remote
controller inter-unit cables from the remote controller
terminal blocks (A, B) of the indoor unit connected
with a remote controller to the remote controller
terminal blocks (A, B) of the other indoor unit.
(No polarity)
2.7
—
—
—
—
—
—
—
2.9
3.2
3.5
—
—
—
—
—
—
3.2
3.4
3.5
—
—
—
—
—
—
Setup data
0000
Filter sign lighting time
0002
None
High ceiling (3)
—
0003
0001
150H
• For address setup, refer to the Installation Manual
supplied with the outdoor unit.
0002
2500H (At shipment from factory)
(Unit: m)
0003
5000H
0004
10000H
In case of remote controller-less (Group control)
To set the unit to high ceiling operation, there is a method that requires the changing of the short plugs on the indoor
P.C. board. The details are shown in the below table.
This method is only to be used where a standard wired remote controller (Group control) is not used.
Increased heating effect
∗ Upon changing the high ceiling setting
If it is not possible to achieve satisfactory heating due
to the installation environment or the structure of the
room. The detected temperature can be increased.
Also use a circulator, etc to circulate hot air near the
ceiling.
• Select setting by the changing of the short plugs
on the indoor P.C. board.
• Short plug position
(CN112, CN111, CN110 from the left)
Short plug position
Set
Follow to the basic operation procedure
(1 → 2 → 3 → 4 → 5 → 6 ).
Filter sold separately
data
Short
Open
• For the item code in Procedure 3 , specify [06].
• For the set data in Procedure 4 , select the setup
data of the required temperature shift value from the
table below.
CN112 CN111 CN110
0000 Standard filter (At shipment)
Setup data
0000
Detection temp shift value
CN112 CN111 CN110
0003 High ceiling (3)
No shift
0001
+1°C
0002
+2°C (At shipment from factory)
0003
+3°C
+4°C
+5°C
+6°C
0004
0005
0006
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8
TEST RUN
In case of wireless remote controller
Before test operation
WARNING
• Before turning on the power supply, carry out the following
procedures.
To protect the compressor at
startup. Ensure the power supply
is left on for 12 or more hours
before operation.
Procedure
Description
1) Using 500V-megger, check there is 1MΩ or more between the
terminal block of the power supply and the earth.
If 1MΩ or less is detected, do not run the unit.
Remove a small screw which fixes the nameplate of the receiver unit.
Remove the nameplate of the sensor section by inserting a minus screwdriver, etc into the notch at the bottom
of the plate, and set the Dip switch to [TEST RUN ON].
1
2
2) Check that all the valves of the outdoor unit are fully opened.
Execute a test operation with
button on the wireless remote controller.
• Never push the electromagnetic contactor to carry out a forced test operation.
(It is very dangerous because a protective device does not work.)
•
,
, and LED flash during test operation.
• Under status of [TEST RUN ON], the temperature adjustment from the wireless remote controller is invalid.
Do not use this method in the operation other than test operation because the equipment is damaged.
How to execute test operation
Use either COOL or HEAT operation mode for a test operation.
3
4
• To carry out a fan operation in a single indoor unit, firstly turn off the power supply to the unit. Then short CN72
found on the P.C. board. Once completed turn the power to the unit back on and start the unit in FAN only mode.
Upon completion of the test do not forget to remove the short circuit on CN72.
* The outdoor unit does not operate approx. 3 minutes after power-ON and operation stop.
After the test operation finished, stop the air conditioner from the wireless remote controller, and return Dip
switch of the receiver section as before.
(A 60-minutes timer clearing function is attached to the receiver section in order to prevent a continuous test
operation.)
• Using the remote controller, check the unit is in normal operation. For the operation procedure, refer to the
supplied Owner’s Manual. A forced test operation can be executed in the following procedure under the condition
of thermo.-OFF of room temperature.
In order to prevent the test operation from running continuously, the operation will cease after a period of
60 minutes. The unit will then return back to its original operation.
NOTE
TEMP.
ON / OFF
Do not use a forced operation in cases other
than test operation because it applies an
excessive load onto the air conditioner.
2, 4
3
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
Receiver unit
Spacer
FILTER
RESET TEST
SET CL
In case of wired remote controller
M4 × 25 screw
(2 pieces)
1, 5
Procedure
Description
Keep the TEST button pushed down for 4 seconds or more.
Small screw
TEST
[TEST] is displayed on the display part and the selection of the test mode is
permitted.
1
2
Nameplate
Notch
ON / OFF
Push
button.
MODE
Using
button, select the operation mode, [COOL] or [HEAT].
•
•
•
Do not run the air conditioner in a mode other than [COOL] or [HEAT].
3
4
The temperature controlling function will not work during the test operation.
Fault detection will perform as usual.
ON / OFF
After the test operation, push the
button to stop the operation.
(Display part is the same as procedure 1 )
Push the TEST button to cancel (release from) the test operation mode.
([TEST] disappears on the display part and the status returns to normal.)
5
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9
TROUBLESHOOTING
Confirmation and check
Check method
On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of
the outdoor unit, a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C.
board) operation is provided. Therefore the operation status can be known. Using this self-diagnosis function, a fault
and the location of this fault within the air conditioning system can be located, as shown in the table below.
CODE No.
When a fault occurs in the air conditioner, the check
code and the indoor unit No. will appear on the display
part of the remote controller.
UNIT No.
R.C.
No.
The check code will only be displayed while the unit is
in operation.
Check code list
If the display disappears, operate the air conditioner
according to the following “Confirmation of error
history” for confirmation.
Check code
Indoor unit No. in which
an error occurred
The following list shows each check code. Find the check contents from the list according to part to be checked.
• In case of a fault from the indoor remote controller: See “Main remote controller display” in the list.
• In case of a fault from the outdoor unit: See “Outdoor 7-segment display” in the list.
• In case of a fault from the indoor unit with a wireless remote controller:
See “Sensor block display of receiving unit” in the list.
IPDU : Intelligent Power Drive Unit
TEMP.
ON / OFF
Confirmation of error history
Terminology
¡ : Lighting,
: Flashing, l : Goes off
¤
ALT. : Flashing is alternately when there are two flashing LED.
2
When a fault occurs in the air conditioner, the error
history can be confirmed with the following procedure.
(The error history is stored in memory and can contain
up to 4 errors).
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
SIM : Simultaneous flashing when there are two flashing LED.
Check code
Wireless remote controller
FILTER
RESET TEST
SET CL
Sensor block display
of receiving unit
Main
remote
Outdoor 7-segment display
Check code name
Judging device
This history can be confirmed from either the operating
status or the stop status.
controller
display
Operation Timer Ready Flash
Auxiliary code
1
3
Communication error between indoor and remote
controller (Detected at remote controller side)
E01
E02
E03
—
—
—
—
—
—
Remote controller
Remote controller
Indoor
l
l
l
l
l
l
¤
¤
¤
l
Remote controller transmission error
Communication error between indoor and remote
controller (Detected at indoor side)
Communication circuit error between indoor/outdoor
(Detected at indoor side)
E04
E06
—
—
—
Indoor
I/F
l
l
l
Procedure
Description
¤
¤
¤
l
l
l
No. of indoor units in which sensor has
been normally received
E06
E07
Decrease of No. of indoor units
SET
l
l
When pushing the
and TEST buttons simultaneously for 4 seconds
or more, the display similar to the one shown in the figure to the right
will appear.
Communication circuit error between indoor/outdoor
(Detected at outdoor side)
—
I/F
CODE No.
E08
E09
E10
E08 Duplicated indoor addresses
Duplicated indoor addresses
Indoor / I/F
Remote controller
Indoor
l
l
l
If [Service Check] is displayed, the fault code will be stored in the
error history mode.
¤
¤
¤
UNIT No.
—
—
—
—
Duplicated main remote controllers
Communication error between indoor MCU
1
R.C.
No.
• 01 (Order of error history) is displayed in CODE No. window.
• Check Code is displayed in the CHECK window.
01: Indoor/Outdoor communication
E12
E15
E16
E18
E19
E12
E15
E16
—
Automatic address start error
I/F
I/F
l
l
l
l
l
l
¤
02: Communication between outdoor units
• The indoor unit address, where the fault has occurred will be
displayed in the UNIT No. window.
—
Indoor is nothing during automatic addressing
Capacity over / No. of connected indoor units
Communication error between indoor units
Outdoor header units quantity error
l
¤
¤
l
00: Capacity over
I/F
TEMP.
l
When pushing the
chronological order.
buttons, the error history stored within the memory will be displayed in
01 ~: No. of connected units
—
Indoor
I/F
¤
l
The numbers displayed within the CODE No. window can vary between 1 and 4. 1 being the most recent fault
and 4 being the oldest.
00: Header is nothing
2
3
E19
¤
¤
02: Two or more header units
01: Outdoor of other line connected
02: Indoor of other line connected
CAUTION
E20
E20
Other line connected during automatic address
I/F
l
l
CL
Do not push the
button as this will erase all of the error history for that indoor unit.
E23
E25
E23
E25
—
—
Sending error in communication between outdoor units
Duplicated follower outdoor addresses
I/F
I/F
l
l
l
l
¤
After confirmation, push the TEST button. This will return the display back to its original mode.
¤
No. of outdoor units which received signal
normally
E26
E28
E26
Decrease of No. of connected outdoor units
Follower outdoor unit error
I/F
I/F
l
l
l
l
¤
¤
E28 Detected outdoor unit number
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 error
E31
E31 04: Fan IPDU error
05: IPDU + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
IPDU communication error
I/F
l
l
¤
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9
TROUBLESHOOTING
Check code
Wireless remote controller
Check code
Wireless remote controller
Main
Sensor block display
of receiving unit
Sensor block display
of receiving unit
Main
remote
controller
display
Outdoor 7-segment display
Check code name
Judging device
Outdoor 7-segment display
Check code name
Judging device
remote
controller
display
Operation Timer Ready Flash
Auxiliary code
Operation Timer Ready Flash
Auxiliary code
F01
F02
F03
F04
F05
F06
F07
F08
F10
F12
—
—
—
—
—
—
—
—
—
—
—
—
ALT Indoor TCJ sensor error
ALT Indoor TC2 sensor error
Indoor
Indoor
Indoor
I/F
l
l
l
¡
¡
¡
¡
¡
l
¡
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
P01
P03
—
—
—
ALT Indoor fan motor error
ALT Discharge temp. TD1 error
Indoor
I/F
l
¤ ¤
P03
l
¤
¤
—
ALT Indoor TC1 sensor error
ALT TD1 sensor error
ALT TD2 sensor error
ALT TE1 sensor error
ALT TL sensor error
01: Comp. 1 side
P04
P05
P07
P04
P05
P07
ALT High-pressure SW system operation
ALT Phase-missing detection /Phase error
ALT Heat sink overheat error
IPDU
I/F
F04
F05
F06
F07
F08
—
l
¤
¤
¤
¤
02: Comp. 2 side
I/F
01: Phase-missing detection
02: Phase error
l
I/F
¤
I/F
01: Comp. 1 side
02: Comp. 2 side
IPDU, I/F
l
ALT TO sensor error
I/F
¤
ALT Indoor TA sensor error
ALT TS1 sensor error
Indoor
I/F
P10
P12
P13
P10 Detected indoor address
ALT Indoor overflow error
Indoor
Indoor
I/F
l
l
l
¤ ¤
¤ ¤
¤ ¤
F12
—
—
ALT Indoor fan motor error
01: Comp. 1 side
02: Comp. 2 side
F13
F13
ALT TH sensor error
IPDU
¡
P13
—
ALT Outdoor liquid back detection error
¤ ¤
01: TS condition
02: TD condition
F15
F16
F23
F24
F29
F31
F15
F16
F23
F24
—
—
—
—
—
—
—
ALT Outdoor temp. sensor miscabling (TE, TL)
ALT Outdoor pressure sensor miscabling (Pd, Ps)
ALT Ps sensor error
I/F
I/F
¡
¡
¡
¡
l
¡
P15
P15
P17
ALT Gas leak detection
I/F
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
l
¤
¤
¤
¤
¤
P17
P19
P20
—
ALT Discharge temp. TD2 error
ALT 4-way valve inverse error
I/F
I/F
I/F
l
I/F
¤
P19 Detected outdoor unit number
l
ALT Pd sensor error
I/F
¤
P20
—
ALT High-pressure protective operation
SIM Indoor other error
Indoor
I/F
l
¤
F31
SIM Indoor EEPROM error
0
1
3
:
:
:
:
IGBT short
Fan motor position detective circuit error
Fan motor trouble
01: Comp. 1 side
02: Comp. 2 side
H01
H02
H03
H01
H02
H03
Compressor break down
IPDU
l
l
l
l
¤
P22
P22
ALT Outdoor fan IPDU error
IPDU
IPDU
TH sensor temp. error
(Heat sink overheat)
l
¤
¤
Magnet switch error
Overcurrent relay operation
Compressor trouble (lock)
MG-SW
Overcurrent relay
IPDU
C
01: Comp. 1 side
02: Comp. 2 side
l
¤
D
E
:
:
TH sensor error
Vdc output error
01: Comp. 1 side
02: Comp. 2 side
Current detect circuit system error
IPDU
l
¤
01: Comp. 1 side
02: Comp. 2 side
P26
P26
ALT G-TR short protection error
l
H04
H06
H07
H04
H06
H07
—
—
—
Comp 1 case thermo operation
Low pressure protective operation
Oil level down detective protection
I/F
I/F
I/F
¤
¤
¤
¤
l
l
l
l
¤
l
01: Comp. 1 side
02: Comp. 2 side
¤
P29
P31
P29
P31
ALT Comp position detective circuit system error
ALT Other indoor unit error (Group terminal unit error)
IPDU
l
¤
¤
l
¤
01: TK1 sensor error
02: TK2 sensor error
03: TK3 sensor error
04: TK4 sensor error
—
Indoor
l
H08
H14
H16
H08
H14
H16
Oil level detective temp sensor error
Comp 2 case thermo operation
I/F
I/F
l
l
l
l
¤
—
l
¤
01: TK1 oil circuit system error
02: TK2 oil circuit system error
03: TK3 oil circuit system error
04: TK4 oil circuit system error
Oil level detective circuit error
Magnet switch error
Overcurrent relay operation
I/F
Error detected by TCC-LINK central control device
MG-SW
l
¤
Overcurrent relay
Check code
Wireless remote controller
L03
L04
—
—
—
SIM Indoor center unit duplicated
Indoor
I/F
l
Sensor block display
of receiving unit
Central
control
¤
¤
¤
Outdoor 7-segment display
Check code name
Judging device
L04
SIM Outdoor line address duplicated
¡
¤
device
indication
Operation Timer Ready Flash
Auxiliary code
Duplicated indoor units with priority
SIM
L05
L06
—
—
I/F
I/F
l
¤
¤
¤
(Displayed in indoor unit with priority)
C05
C06
—
—
—
—
—
—
Sending error in TCC-LINK central control device
Receiving error in TCC-LINK central control device
TCC-LINK
TCC-LINK
Duplicated indoor units with priority
SIM
L06 No. of indoor units with priority
l
¤
(Displayed in unit other than indoor unit with priority)
L07
L08
L09
L10
L20
L28
—
—
—
—
—
—
—
SIM Group line in individual indoor unit
SIM Indoor group/Address unset
SIM Indoor capacity unset
Indoor
Indoor, I/F
Indoor
I/F
Batch alarm of general-purpose equipment control General-purpose equipment
l
¤
¤
¤
¤
¤
¤
¤
C12
P30
—
—
—
interface
I/F
L08
—
l
¤
Differs according to error contents of unit with occurrence of alarm
(L20 is displayed.)
Group control branching unit error
Duplicated central control addresses
l
¤
TCC-LINK
—
—
L10
L20
L28
SIM Outdoor capacity unset
¡
¤
SIM Duplicated central control addresses
SIM Over No. of connected outdoor units
Indoor
I/F
¡
¤
¡
¤
01: IPDU1 error
02: IPDU2 error
03: IPDU3 error
L29
L29 04: Fan IPDU error
05: IPDU1 + Fan IPDU error
SIM No. of IPDU error
I/F
¡
Terminology
¤
¤
¤
06: IPDU2 + Fan IPDU error
07: All IPDU error
TCC-LINK : TOSHIBA Carrier Communication Link.
L30
—
L30 Detected indoor address
SIM Indoor outside interlock
Extended I/C error
Indoor
I/F
¡
¤
L31
—
—
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9
TROUBLESHOOTING
10
MAINTENANCE
Prior to maintenance, ensure the power supply is turned off.
New check code
1. Difference between the new check code and the current system
CAUTION
The displaying method of the check code will change from this model onwards.
Do not handle the buttons with wet hands as this will cause the risk of electric shock.
New check code
Daily maintenance
Cleaning of air filter
Used characters
Alphabet + Decimal notation, 2 digits
CODE No.
Characteristics of code classification
Many classification of communication/incorrect setup system
1
If
is displayed on the remote controller, maintenance
1,
2
to the air filter is required.
Communication/Incorrect setup (4-ways), Indoor protection, Outdoor protection,
Sensor, Compressor protection, etc.
Block display
TEMP.
ON / OFF
2
3
Clogging of the air filter decreases cooling/heating efficiency.
FILTER
RESET
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
After cleaning, push the
.
Display
Classification
display disappears.
Display on wired remote controller
• [ ] goes on.
FILTER
RESET TEST
SET CL
A
C
E
F
H
J
Unused
3
[4-way Air Discharge Cassette Type]
• [UNIT No.] + Check code + Operation lamp (Green) flash
Central control system error
Communication system error
Each sensor error (Failure)
Compressor protective system error
Unused
Display on sensor part of wireless remote controller
1
Open the air inlet grille.
4
5
Mount the air filter.
• Block display will show a combination of
• Slide the air inlet grille buttons to detach the air
inlet grille from the main ceiling panel. Lower the
grille slowly while holding.
Close the air inlet grille.
→
[
] [ ] [ ] symbols.
• Close the air inlet grille, slide the button to locate
into the ceiling panel fixing securely.
Display on 7-segment in outdoor unit
FILTER
RESET
2
3
Take out the air filter.
6
Push the
.
• Unit No. and check code are displayed.
L
P
Setup error, Other errors
Protective device operation
• Push the extrusion of the air filter away from the
grille and remove.
• In case of error the auxiliary code, check code and sub-code
are displayed alternately.
•
display disappears.
Cleaning with water or vacuum cleaner
5
• If dirt is heavy, clean the air filter using tepid water
with a neutral detergent or just water.
2. Special mention
3
• When the air conditioner stops and the error is cleared, the check code display on the remote controller will also
disappear.
• After cleaning with water, dry the air filter
sufficiently in a shaded place.
2
However, if the error continues after the unit has been stopped, the check code will immediately be displayed
when the unit is restarted.
Air inlet grille
1
Strap to
prevent falling
Button
Air inlet grille
Push
Air filter
Button
1
2
Cleaning of air outlet flap
The air outlet flap can be removed to clean if necessary.
1
2
3
Remove the air outlet flap.
• Holding both ends of the air outlet flap, remove it by sagging the center downwards.
Clean the air outlet flap with water.
• If dirt is heavy, clean the air outlet flap using tepid water with neutral detergent or just water.
Mount the air outlet flap.
2
Insert in the flap sagging
down the center downward.
• First push in the one side, and insert the opposite side by sagging
the center downwards.
1
Insert
3
Be careful to insert the flap in the correct direction.
Insert the flap with the printed mark facing upwards, and
the arrow on the flap pointing in the outward direction.
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4. REFRIGERATING CYCLE DIAGRAM
Liquid side Gas side
Strainer
Capillary tube
Air heat exchanger
at indoor side
Pulse Motor
Valve (PMV)
Strainer
Sensor
(TCJ)
Fan
M
Sensor
(TC2)
Sensor
(TC1)
Sensor
(TA)
Fan motor
Functional part name
Functional outline
(Connector CN082 (6P): Blue)
Pulse Motor Valve
PMV
1) Controls super heat in cooling operation
2) Controls under cool in heating operation
3) Recovers refrigerant oil in cooling operation
4) Recovers refrigerant oil in heating operation
Temp. sensor
1. TA
(Connector CN104 (2P):Yellow)
1) Detects indoor suction temperature
2. TC1 (Connector CN100 (3P): Brown)
1) Controls PMV super heat in cooling operation
3. TC2 (Connector CN101 (2P): Black)
1) Controls PMV under cool in heating operation
4. TCJ
(Connector CN102 (2P): Red)
1) Controls PMV super heat in cooling operation
34
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5. CONTROL OUTLINE
5-1. Control Specifications
No.
Item
Outline of specifications
Remarks
1
Power supply
is reset.
1. Distinction of outdoor unit
When the power supply is reset, the outdoor units are
distinguished, and control is exchanged according to the
distinctive results.
2. Check code clear
When the power supply is reset, the check code is also reset
once. If an abnormal status which the check code appears
after Start/Stop button of the remote controller has been
pushed continues, the check code is displayed again on the
remote controller.
2
Operation
select
1. Based upon the operation select command from the remote
controller or central controller, the operation mode is se-
lected.
Remote controller
Control outline
command
STOP
FAN
Stops air conditioner.
Fan operation
COOL
Cooling operation
DRY
Dry operation
HEAT
Heating operation
COOL/HEAT AUTO operation
COOL/HEAT AUTO
Heating operation is automatically selected with difference
between setup temperature and room temperature.
3
Room temp.
control
1. Adjustment range, set temperature on remote controller (°C)
All cooling
18 to 29°C
18 to 30°C
All heating
18 to 29°C
16 to 30°C
Wired type
Wireless type
2. From the item code 06, the setup temperature in heating
operation can be corrected.
Setup data
0
2
4
6
Heating suction temperature
shift
Setup temp. correction
+0°C
+2°C
+4°C
+6°C
Setup at shipment
Setup data
2
4
5
Automatic
capacity
control
1. Based upon difference between Ta and Ts, the operation
frequency is indicated to the outdoor unit.
TS: Set temperature
Ta: Room temperature
Air volume
control
1. By the command from the remote controller, “HIGH
”,
“MED
”, or “LOW
” and “AUTO
” operation is
executed.
2. While air speed is in AUTO mode, the air speed is changed
according to the difference between Ta and Ts.
35
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No.
Item
Outline of specifications
Remarks
6
Prevention of
cold air
1. In all heating operation, the upper limit of the fan tap is set by
one with higher temperature of TC2 sensor and TCJ sensor.
discharge
• When B zone has continued for 6 minutes, the operation
shifts to C zone.
• In defrost time, the control point is set to +6°C.
• In D and E zones, priority
is given to remote control-
ler air speed setup.
• In A “ ” is displayed.
(˚C)
32
A zone: OFF
B zone:
Over 26˚C, below 28˚C, ULTRA LOW
C zone:
Over 28˚C, below 30˚C, LOW
D zone:
Over 30˚C, below 32˚C, MED
D
C
30
28
26
E
E zone: HIGH
20
16
B
A
7
Freeze
1. In all cooling operation, the air conditioner operates as de-
scribed below based upon temp. detected by TC1, TC2 and
TCJ sensors.
prevention
control (Low
temp. release)
To prevent the heat exchanger from freezing, the operation
stops.
• When “J” zone is detected for 5 minutes, the command
frequency becomes “S0” to the outdoor unit.
• In “K” zone, the timer count is interrupted, and held.
• When “I ” zone is detected, the timer is cleared and the
operation returns to the normal operation.
• When the command frequency became S0 with continua-
tion of “J” zone, operation of the the indoor fan in LOW
mode until it reaches the “I ” zone.
It is reset when the following conditions are satisfied.
Reset conditions
>
>
>
1) TC1 12°C and TC2 12°C and TCJ 12°C
2) 30 minutes passed after stop.
( ) value:
When the power supply is
turned on, the Forced
thermo becomes OFF if the
temperature is less than this
indicated temperature.
(˚C)
TC1
TC2, TCJ
–10°C
a
P1
Q1
K
P1 10°C (5°C)
J
Q1
0°C
–14°C
2. In all cooling operation, the air conditioner operates as
described below based upon temp. detected by TC2 and TCJ
sensors.
• When “M” zone is detected for 45 minutes, the command
frequency becomes “S0” to the outdoor unit.
• In “N” zone, the timer count is interrupted and held.
• When shifting to “M” zone again, the timer count restarts
and continues.
• If “L” zone is detected, the timer is cleared and the opera-
tion returns to normal operation.
Reset conditions
>
>
>
1) TC1 12°C and TC2 12°C and TCJ 12°C
2) 30 minutes passed after stop.
(˚C)
L
TC2, TCJ
5°C
P2
N
P2
Q2
∗ In a Model without TC2,
TC2 is not judged.
M
Q2
–2.0°C
36
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No.
Item
Outline of specifications
Remarks
8
Recovery control
for cooling
refrigerant and oil
1. The indoor unit which stops operation, thermostat is OFF,
or operates in FAN mode opens PMV of the indoor unit by
the specified opening degree when cooling refrigerant or oil
recovery signal is received from the outdoor unit.
• Recovery operation is
usually executed every 2
hours.
2. Drain pump of Compact 4-way Air Discharge Cassette type
operates during recovery control mode.
9
Recovery control
for heating
The indoor unit which stops operation, thermostat is OFF, or
operates in FAN mode performs the following controls when
• In the indoor unit which
thermostat is OFF, or
operates in FAN mode,
refrigerant and oil the heating refrigerant/Oil recovery signal is received from the
outdoor unit.
“
” lamp goes on.
1. Opens PMV of the indoor unit by the specified opening
degree.
2. Stops the fan.
• Recovery operation is
usually executed every
1 hour.
(In this time the flap
directs upward)
3. Compact 4-way Air Discharge Cassette type air conditioner
rotates the indoor fan with Ultra Low Fan operation for
approx. 1 minute after recovery control.
4. After recovery control, drain pump of Compact 4-way Air
Discharge Cassette type will operate.
10 Short intermittent 1. For 5 minutes after the operation has started, the operation
operation
compensation
control
is continued even if entering thermostat-OFF condition.
2. However, if the thermostat has been turned off by changing
the set up temp., the thermostat is OFF with even the
above condition. The protective control has priority.
11 Drain pump
control
1. During “COOL” operation (including DRY operation), the
Check code [P10]
drain pump operates.
2. While the drain pump operates, if the float switch works,
the drain pump continues operation and a check code is
displayed.
3. While the drain pump stops, if the float switch works, turn
off the capacity demand command, stop the operation, and
operate the drain pump. If the float switch continues
operating for approx. 5 minutes, the operation stops and
the check code is displayed.
12 Elimination of
remaining heat
1. When the air conditioner stops in the “HEAT” mode, drive
the indoor fan with “LOW” mode for approx. 30 seconds.
13 Auto flap control
1. When the flap signal has been received from the remote
controller, the louver operates if the indoor fan is operating.
2. In Compact 4-way Air Discharge Cassette type, the
discharge flap automatically directs upward if the operation
stops.
3. In Compact 4-way Air Discharge Cassette type, the
discharge flap directs upward if the heating operation is
being prepared.
14 Filter sign display 1. The operation time of the indoor fan is integrated and
(None in wireless
type)
∗ Provided in the
separately laid
type
stored in memory, and the filter exchange signal is sent to
the remote controller to display on the remote controller
LCD after the specified time.
2. When the filter reset signal is received form the remote
controller, time of the integrated timer is cleared. In this
time, if the specified time has passed, the measured time is
reset and LCD display disappears.
TCB-AX21E.
37
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No.
Item
” and “
display
(Operation and
Outline of specifications
Remarks
15
“
”
<Operation standby> .......... Display on remote controller
1. • “P05” is one of displays of power wire missing.
• “P05” of power cable is detected.
• “ ” goes on.
heating stand-by)
• “COOL/DRY” operation cannot be performed because the
other indoor unit is under “HEAT” operation.
• “HEAT” operation cannot be performed because COOL
priority is set (Outdoor I/F P.C. board SW11 1-bit is ON)
and the other indoor unit is under “COOL/DRY” operation.
• “FAN” operation cannot be performed because the system
performs “Heat oil/Refrigerant recovery” operation.
• There is a unit in which indoor overflow “P10” is detected.
• There is a unit in which interlock alarm “P23” is detected.
2. The above indoor units unavailable to operate waits under
condition of thermostat OFF.
• “ ” goes on.
<HEAT standby> .................. Display on remote controller
1. • During HEAT operation, the fan rotates with lower air speed
than one specified in order to prevent discharge of cold
draft or stops. (including case that defrost operation is
being performed)
• “HEAT” operation cannot be performed because COOL
priority is set (Outdoor I/F P.C. board SW11 bit 1 is ON) and
the other indoor unit is under “COOL/DRY” operation.
2. “HEAT standby” is displayed until the above conditions are
released.
16 Selection of
central control
mode
1. The contents which can be changed on the remote controller
at indoor unit side can be selected by setup at the central
controller side.
2. In case of operation from TCC-LINK central controller
(TCB-SC642 TLE2, etc.)
[Central control mode 1] : Cannot operate
[Central control mode 2] :
Cannot operate, stop, select mode, set up temp.
[Central control mode 3] :
Cannot select mode, set up temp.
[Central control mode 4] : Cannot select mode
3. RBC-AMT31E (Wired remote controller)
If operation is performed
from the remote control
“CENTRAL CONTROL”
mode, the status is
notified with receiving
sound.
While mode is the central control mode, “
CENTRAL”
lights on the display part of the remote controller.
38
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6. APPLIED CONTROL
6-1. Setup of Selecting Function in Indoor Unit
(Be sure to Execute Setup by a Wired Remote Controller)
<Procedure> Execute the setup operation while the unit stops.
TEMP.
ON / OFF
3
5
6
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
4
2
FILTER
RESET TEST
SET CL
1
SET
CL
TEST
1
2
Push
,
, and
buttons simultaneously for 4 seconds or more.
The firstly displayed unit No. indicates the header indoor unit address in the group control.
In this time, the fan of the selected indoor unit is turned on.
UNIT
Every pushing
button, the indoor unit numbers in the group control are successively
displayed. In this time, the fan of the selected indoor unit only is turned on.
Specify the item code (DN) using the setup temperature and buttons.
Select the setup data using the timer time and buttons.
3
4
(When selecting the DN code to “33”, change the temperature indication of the unit from “°C”
to “°F” on the remote controller.)
SET
5
6
Push
button. (OK if display goes on.)
2
.
• To change the item to be set up, return to procedure
• To change the selected indoor unit, return to procedu3re
.
TEST
Pushing
button returns the status to normal stop status.
39
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Table: Function selecting item numbers (DN)
(Items necessary to perform the applied control at the local site are described.)
DN
Item
Description
At shipment
0002 : 2500H
01 Filter display delay timer
0000 : None
0002 : 2500H
0004 : 10000H
0001 : 150H
0003 : 5000H
02 Dirty state of filter
0000 : Standard
0001 : High degree of dirt (Half of standard time)
0000 : Standard
0099 : Unfixed
0000 : No priority
03 Central control address
0001 : No.1 unit
0099 : Unfixed
to
0064 : No.64 unit
0001 : Priority
04 Specific indoor unit priority 0000 : No priority
06 Heating temp shift
0000 : No shift
0001 : +1°C
0002 : +2°C
0002 : +2°C
to
0010 : +10°C
(Floor type 0000: 0°C)
(Up to +6 recommended)
0d Existence of [AUTO] mode 0000 : Provided
0001 : Not provided (Automatic selection from connected outdoor unit)
0001 : Not provided
0000 : Not provided
0000 : Heat pump
0E Follows operation mode of 0000 : Does not follow
the header unit
0001 : Follows
0F Cooling only
0000 : Heat pump
0001 : Cooling only (No display of [AUTO] [HEAT])
10 Type
0014: Compact 4-way Air Discharge Cassette
0014:
Compact 4-way A/D only
11 Indoor unit capacity
12 Line address
0000 : Unfixed
0001 : No.1 unit
0001 : No.1 unit
0000 : Individual
0001 to 0034
According to capacity type
0099 : Unfixed
to
to
0030 :No.30 unit
13 Indoor unit address
0064 :No.64 unit
0099 : Unfixed
14 Group address
0001 :Header unit of group
0099 : Unfixed
0002 : Follower unit of group
1E Temp difference of [AUTO] 0000 : 0 deg to
0010 :10 deg
0003 : 3 deg
(Ts±1.5)
mode selection COOL →
(For setup temperature, reversal of COOL/HEAT by ± (Data value)/2)
HEAT, HEAT → COOL
28 Automatic restart of power 0000 : None
failure
0001 :Restart
0000 : None
0002 : None
2A Selection of option/error
input (CN70)
0000 : Filter input
0002 : None
0001 :Alarm input (Air washer, etc.)
0001 :Leaving-ON prevention control
2E HA terminal (CN61) select 0000 : Usual
0002 : Fire alarm input
0000 : Usual
(HA terminal)
31 Ventilating fan control
32 TA sensor selection
33 Temperature unit select
0000 : Unavailable
0001 :Available
0000 : Unavailable
0000 : Body TA sensor
0000 : °C
0000 : Body TA sensor
0001 :Remote controller sensor
0000 : °C (at factory shipment)
0001 : °F
5d High ceiling selection
(Air volume selection)
[Compact 4-way Air Discharge Cassette type]
0000 : AP007 to AP012; Below 2.7m
AP015; Below 2.9m
0000 : Standard
AP018; Below 3.2m
0002 : AP015; Below 3.2m
AP018; Below 3.4m
0003 : AP015, AP018; Below 3.5m
60 Timer set
0000 : Available (Operable)
0000 : Available
(Wired remote controller)
0001 : Unavailable (Operation prohibited)
40
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TYPE
Indoor unit capacity
Item code [11]
Item code [10]
Setup
data
Abbreviated
Model name
Setup data
0001
Model
007
Type
0014
Compact 4-way Air Discharge Cassette MMU-AP XXX MH
0003
009
0005
012
0007
015
0009
018
6-2. Applied Control in Indoor Unit
n Remote location ON/OFF control box (TCB-IFCB-4E)
[Wiring and setup]
• Use the exclusive connector for connection with the indoor control P.C. board.
• In a group control, the system can operate when connecting with any indoor unit (Control P.C. board) in the
group. However when taking out the operation/error signal from the other unit, it is necessary to take out from
each unit individually.
(1) Control items
1) Start/Stop input signal : Operation start/stop in unit
2) Operation signal
3) Error signal
: Output during normal operation
: Output during alarm
(Serial communication error or indoor/outdoor protective device) operation
(2) Wiring diagram using remote control interface (TCB-IFCB-4E)
Input
IFCB-4E : No voltage ON/OFF serial signal
No voltage contact for operation, error display
Contact capacity: Below Max. AC240V 0.5A
Output
Remote location ON/OFF control box
(TCB-IFCB-4E)
Indoor control P.C. board
Start/Stop input
COM (GND)
1
2
3
4
5
6
1
2
3
4
ON/OFF serial
signal input
Remote controller prohibition/clear input
Operation signal output
COM (+12V)
COM
CN06
Error signal output
1
2
CN61
T10
(YEL)
3
4
5
6
CN13
Operation signal output
Error signal output
Power supply 220–240V, ~50Hz
41
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n Ventilating fan control from remote controller
[Function]
• The start/stop operation can be operated from the wired remote controller when air to air heat exchanger or
ventilating fan is installed in the system.
• The fan can be operated even if the indoor unit is not operating.
• Use a fan which can receive the no-voltage A contact as an outside input signal.
• In a group control, the units are collectively operated and they can not be individually operated.
(1) Operation
Handle a wired remote controller in the following procedure.
∗ Use the wired remote controller during stop of the system.
∗ Be sure to set up the wired remote controller to the header unit. (Same in group control)
∗ In a group control, if the wired remote controller is set up to the header unit, both header and follower units
are simultaneously operable.
SET
CL
TEST
1
2
Push concurrently
+
+
buttons for 4 seconds or more.
The unit No. displayed firstly indicates the header indoor unit address in the group control.
In this time, the fan of the selected indoor unit turns on.
UNIT
Every pushing
sively.
button, the indoor unit numbers in group control are displayed succes-
In this time, the fan of the selected indoor unit only turns on.
3
4
Using the setup temp
Using the timer time
or
button, specify the item code 31.
or
button, select the setup data. (At shipment: 0000 )
The setup data are as follows:
Setup data
0000
Handling of operation of air to air heat exchanger or ventilating fan
Unavailable (At shipment)
Available
0001
SET
5
6
Push
button. (OK if display goes on.)
2
).
• To change the item to be set up, go to the procedure
• To change the selected indoor unit, go to the procedu3re
).
TEST
Pushing
returns the status to the usual stop status.
(2) Wiring
Compact 4-way Air Discharge Cassette type
4-way Air Discharge Cassette type
1-way Air Discharge Cassette type (2 series)
Concealed Duct Standard type
Slim Duct type
Relay (DC12V, procured locally)
Outside control
CN32
FAN DRIVE
(2P WHI)
model :
1
2
1
2
input of fan
To terminal
Under Ceiling type
High Wall type
Corresponds up to a relay in which rated current of the
operation coil is approx. 75mA
Indoor control
P.C. board
Note) Determine the cable length between the
Other type models:
indoor control P.C. board and the relay within 2m.
Correspond up to a relay in which rated current of the
operation coil is approx. 16mA (Does not correspond
to a terminal block type relay on the market.)
42
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n Leaving-ON prevention control
[Function]
• This function controls the indoor units individually. It is connected with cable to the control P.C. board of the
indoor unit.
• In a group control, it is connected with cable to the indoor unit (Control P.C. board), and the item code 2E is
set to the connected indoor unit.
• It is used when the start operation from outside if unnecessary but the stop operation is necessary.
• Using a card switch box, card lock, etc, the forgotten-OFF of the indoor unit can be protected.
• When inserting a card, start/stop operation from the remote controller is allowed.
• When taking out a card, the system stops if the indoor unit is operating and start/stop operation from the
remote controller is forbidden.
(1) Control items
1) Outside contact ON : The start/stop operation from the remote controller is allowed.
(Status that card is inserted in the card switch box)
2) Outside contact OFF : If the indoor unit is operating, it is stopped forcedly.
(Start/Stop prohibited to remote controller)
(Status that card is taken out from the card switch box)
∗ When the card switch box does not perform the above contact operation, convert it using a relay with b
contact.
(2) Operation
Handle the wired remote controller switch in the following procedure.
∗ Use the wired remote controller switch during stop of the system.
SET
CL
TEST
1
2
3
4
5
Push concurrently
+
+
buttons for 4 seconds or more.
button, specify the item code 2E .
button, set 0001 to the setup data.
Using the setup temp
or
Using the timer time
or
SET
Push
Push
button.
TEST
button. (The status returns to the usual stop status.)
(3) Wiring
Relay (procured locally)
CN61
1 1
T10
2 2
(YEL)
3 3
4 4
5 5
6 6
* In the figure, the contact indicates
a status that the card is taken out.
Indoor control P.C. board
Power supply
Outside contact (Card switch box, etc: Procured locally)
Note) Determine the cable length between the indoor control P.C. board and the relay within 2m.
n Power peak-cut from indoor unit
When the relay is turned on, a forced thermostat-OFF operation starts.
• Wiring example
Relay (procured locally)
CN73
Note) Determine the cable length between the indoor or
outdoor control P.C. board and the relay within 2m.
1
2
1
2
EXCT
(2P plug: RED)
Relay coil signal
Indoor control P.C. board
43
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7. TROUBLESHOOTING
7-1. Troubleshooting Summary
1. Before troubleshooting
1) Applied models
S-MMS Multi type models
‚
ƒ
Indoor unit: MMX-APXXX,
Outdoor unit: MMY-MAPXXXHT8, MMY-MAPXXXT7
Super Heat Recovery Multi type models
Indoor unit: MMX-APXXX,
Outdoor unit: MMY-MAPXXXFT8
Mini-S-MMS Multi type models
Indoor unit: MMX-APXXX,
Outdoor unit: MCY-MAPXXXHT, MCY-MAPXXXHT2D
2) Required tools / measuring devices
• Screwdrivers (Philips, Minus), spanner, radio pinchers, nipper, push pin for reset switch, etc.
• Tester, thermometer, pressure gauge, etc.
3) Confirmation before check (The following items are not troubles.)
No.
Operation
Check items
1
Compressor does not operate.
• Is not delayed for 3 minutes? (3 minutes after compressor-OFF)
• Is not thermostat OFF?
• Is not the fan operating or timer?
• Is not the system initially communicating?
Heating operation cannot be performed under condition of outside tempera-
ture 21°C or higher.
Cooling operation cannot be performed under condition of outside tempera-
ture –5°C or lower.
2
3
Indoor fan does not work.
• Is not the cold draft prevention being controlled in heating operation?
Outdoor fan does not rotate, or • Is not low cooling operation being controlled?
fan speed changes.
• Is not a defrost operation being performed?
4
5
6
Indoor fan does not stop.
• Is not after-heat elimination operation being controlled after heating opera-
tion?
Start/stop operation on remote
controller is unavailable.
• Is not auxiliary unit or remote control being operated?
——
• Is connecting wire of indoor unit or remote controller correct?
2. Troubleshooting procedure
When a trouble occurred, advance the check operation in the following procedure.
Check the check display
on the interface P.C. board
of the outdoor unit.
Check position or part
in which trouble occurred.
Trouble
NOTE) While a check operation is performed, a malfunction of the microprocessor may be caused due to
condition of the power supply or the external noise. If there is any noise source, change wires of the
remote controller and signal wires to shield wires.
44
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7-2. Check Method
On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board
of the outdoor unit, a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C.
board) to display the operation is provided.Therefore the operation status can be known. Using this self-diagno-
sis function, a trouble or position with trouble of the air conditioner can be found as shown in the table below.
Check code list
The following list shows each check code. Find the check contents from the list according to part to be checked.
• In case of check from indoor remote controller: See “Main remote controller display” in the list.
• In case of check from outdoor unit: See “Outdoor 7-segment display” in the list.
• In case of check from indoor unit with wireless remote controller: See “Sensor block display of receiving unit”
in the list.
IPDU: Intelligent Power Drive Unit
¡ : Lighting, : Flashing, : Goes off
l
¤
ALT.: Flashing is alternately when there are two flashing LED.
SIM: Simultaneous flashing when there are two flashing LED
Check code
Wireless remote controller
Sensor block display
of receiving unit
Main
remote
controller
display
Outdoor 7-segment display
Check code name
Judging device
Timer Ready Flash
Auxiliary code
Operation
Communication error between indoor and remote
controller (Detected at remote controller side)
E01
E02
E03
—
—
—
—
—
—
Remote controller
Remote controller
Indoor
l
l
l
l
l
l
¤
¤
¤
l
Remote controller transmission error
Communication error between indoor and remote
controller (Detected at indoor side)
Communication circuit error between
indoor/outdoor (Detected at indoor side)
E04
E06
—
—
—
Indoor
I/F
l
l
l
¤
¤
¤
l
l
l
No. of indoor units in which sensor has
been normally received
E06
E07
Decrease of No. of indoor units
l
l
Communication circuit error between
indoor/outdoor (Detected at outdoor side)
—
I/F
E08
E09
E10
E08 Duplicated indoor addresses
Duplicated indoor addresses
Indoor / I/F
Remote controller
Indoor
l
l
l
¤
¤
¤
—
—
—
—
Duplicated main remote controllers
Communication error between indoor MCU
01: Indoor/Outdoor communication
E12
E15
E16
E18
E19
E12
E15
E16
—
Automatic address start error
I/F
I/F
l
l
l
l
l
l
¤
02: Communication between outdoor units
—
Indoor is nothing during automatic addressing
Capacity over / No. of connected indoor units
Communication error between indoor units
Outdoor header units quantity error
l
¤
¤
l
00: Capacity over
I/F
l
01 ~: No. of connected units
—
Indoor
I/F
¤
l
00: Header is nothing
E19
¤
¤
¤
¤
¤
¤
02: Two or more header units
01: Outdoor of other line connected
02: Indoor of other line connected
E20
E20
Other line connected during automatic address
I/F
l
l
Sending error in communication between outdoor
units
E23
E25
E26
E28
E23
E25
E26
—
—
I/F
I/F
I/F
I/F
l
l
l
l
l
l
l
l
Duplicated follower outdoor addresses
Decrease of No. of connected outdoor units
Follower outdoor unit error
No. of outdoor units which received signal
normally
E28 Detected outdoor unit number
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 error
E31
E31 04: Fan IPDU error
05: IPDU + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
IPDU communication error
I/F
l
l
¤
45
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Check code
Wireless remote controller
Sensor block display
of receiving unit
Main
remote
controller
display
Outdoor 7-segment display
Check code name
Judging device
Timer Ready Flash
Auxiliary code
Operation
F01
F02
F03
F04
F05
F06
F07
F08
F10
F12
—
—
—
—
—
—
—
—
—
—
—
—
ALT Indoor TCJ sensor error
ALT Indoor TC2 sensor error
Indoor
Indoor
Indoor
I/F
l
l
l
¡
¡
¡
¡
¡
l
¡
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
—
ALT Indoor TC1 sensor error
ALT TD1 sensor error
ALT TD2 sensor error
ALT TE1 sensor error
ALT TL sensor error
F04
F05
F06
F07
F08
—
I/F
I/F
I/F
ALT TO sensor error
ALT Indoor TA sensor error
ALT TS1 sensor error
I/F
Indoor
I/F
F12
01: Comp. 1 side
02: Comp. 2 side
F13
F13
ALT TH sensor error
IPDU
¡
¤ ¤
F15
F16
F23
F24
F29
F31
F15
F16
F23
F24
—
—
—
—
—
—
—
ALT Outdoor temp. sensor miscabling (TE, TL)
ALT Outdoor pressure sensor miscabling (Pd, Ps)
ALT Ps sensor error
I/F
I/F
¡
¡
¡
¡
l
¡
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
¤ ¤
I/F
ALT Pd sensor error
I/F
SIM Indoor other error
Indoor
I/F
F31
SIM Indoor EEPROM error
01: Comp. 1 side
02: Comp. 2 side
H01
H02
H03
H01
H02
H03
Compressor break down
IPDU
l
l
l
l
¤
Magnet switch error
Overcurrent relay operation
Compressor trouble (lock)
MG-SW
Overcurrent relay
IPDU
01: Comp. 1 side
02: Comp. 2 side
l
¤
01: Comp. 1 side
02: Comp. 2 side
Current detect circuit system error
IPDU
l
¤
H04
H06
H07
H04
H06
H07
—
—
—
Comp 1 case thermo operation
Low pressure protective operation
Oil level down detective protection
I/F
I/F
I/F
l
l
l
l
¤
l
¤
l
¤
01: TK1 sensor error
02: TK2 sensor error
03: TK3 sensor error
04: TK4 sensor error
H08
H14
H16
H08
H14
H16
Oil level detective temp sensor error
Comp 2 case thermo operation
I/F
I/F
l
l
l
l
¤
—
l
¤
01: TK1 oil circuit system error
02: TK2 oil circuit system error
03: TK3 oil circuit system error
04: TK4 oil circuit system error
Oil level detective circuit error
Magnet switch error
Overcurrent relay operation
I/F
MG-SW
Overcurrent relay
l
¤
L03
L04
—
—
—
SIM Indoor center unit duplicated
SIM Outdoor line address duplicated
Indoor
I/F
l
¤
¤
¤
L04
¡
¤
Duplicated indoor units with priority
SIM
L05
L06
—
—
I/F
I/F
l
¤
¤
¤
(Displayed in indoor unit with priority)
Duplicated indoor units with priority
SIM
L06 No. of indoor units with priority
l
¤
(Displayed in unit other than indoor unit with priority)
L07
L08
L09
L10
L20
L28
—
—
—
—
—
—
—
SIM Group line in individual indoor unit
SIM Indoor group/Address unset
SIM Indoor capacity unset
Indoor
Indoor, I/F
Indoor
I/F
l
¤
¤
¤
¤
¤
¤
¤
L08
—
l
¤
l
¤
L10
L20
L28
SIM Outdoor capacity unset
¡
¤
SIM Duplicated central control addresses
SIM Over No. of connected outdoor units
Indoor
I/F
¡
¤
¡
¤
01: IPDU1 error
02: IPDU2 error
03: IPDU3 error
L29
L29 04: Fan IPDU error
05: IPDU1 + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
SIM No. of IPDU error
I/F
¡
¤
¤
¤
L30
—
L30 Detected indoor address
SIM Indoor outside interlock
Extended I/C error
Indoor
I/F
¡
¤
L31
—
—
46
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Check code
Wireless remote controller
Sensor block display
of receiving unit
Judging
device
Main
remote
Outdoor 7-segment display
Check code name
controller
display
Timer Ready Flash
Auxiliary code
Operation
l
P01
P03
—
—
—
ALT Indoor fan motor error
ALT Discharge temp. TD1 error
Indoor
I/F
¤ ¤
P03
l
¤
¤
01: Comp. 1 side
P04
P05
P07
P04
P05
P07
ALT High-pressure SW system operation
ALT Phase-missing detection /Phase error
ALT Heat sink overheat error
IPDU
I/F
l
¤
¤
¤
¤
02: Comp. 2 side
01: Phase-missing detection
02: Phase error
l
¤
01: Comp. 1 side
02: Comp. 2 side
IPDU, I/F
l
¤
P10
P12
P13
P10 Detected indoor address
ALT Indoor overflow error
Indoor
Indoor
I/F
l
l
l
¤ ¤
¤ ¤
¤ ¤
—
—
—
ALT Indoor fan motor error
P13
ALT Outdoor liquid back detection error
01: TS condition
P15
P15
ALT Gas leak detection
I/F
l
¤
¤
¤
¤
¤
¤
02: TD condition
P17
P19
P20
P17
—
ALT Discharge temp. TD2 error
ALT 4-way valve inverse error
I/F
I/F
I/F
l
P19 Detected outdoor unit number
l
¤
P20
—
ALT High-pressure protective operation
l
¤
0
: IGBT short
1
: Fan motor position detective circuit error
: Fan motor trouble
3
P22
P22
ALT Outdoor fan IPDU error
IPDU
l
¤
¤
C
D
E
: TH sensor temp. error (Heat sink overheat)
: TH sensor error
: Vdc output error
01: Comp. 1 side
02: Comp. 2 side
P26
P26
ALT G-TR short protection error
IPDU
l
¤
¤
¤
¤
¤
¤
01: Comp. 1 side
02: Comp. 2 side
P29
P31
P29
P31
ALT Comp position detective circuit system error
IPDU
l
Other indoor unit error
ALT
—
Indoor
l
(Group terminal unit error)
Error detected by TCC-LINK central control device
Check code
Wireless remote controller
Sensor block display
of receiving unit
Central
control
Outdoor 7-segment display
Check code name
Judging device
device
indication
Timer Ready Flash
Auxiliary code
Operation
C05
C06
—
—
—
—
—
—
Sending error in TCC-LINK central control device
Receiving error in TCC-LINK central control device
TCC-LINK
TCC-LINK
Batch alarm of general-purpose equipment control General-purpose equipment
C12
P30
—
—
—
interface
I/F
Differs according to error contents of unit with occurrence of alarm
(L20 is displayed.)
Group control branching unit error
Duplicated central control addresses
TCC-LINK
—
—
47
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The check code
1. TheTCC LINK check code
The displaying method of the check code.
TCC Link
Alphabet + Decimal notation, 2 digits
Used characters
|
Display
Classification
→
Characteristics of
code classification
Many classification of communication/
incorrect setup system
A
C
E
F
H
J
Unused
Central control system error
Communication system error
Each sensor error (Failure)
Compressor protective system error
Unused
Communication/Incorrect setup (4 ways),
Indoor protection, Outdoor protection,
Sensor, Compressor protection, etc.
Block display
L
Setup error, Other errors
Protective device operation
P
< Display in wired remote controller >
• [ ] goes on.
• [UNIT No.] + Check code + Operation lamp (Green) flash
<Display on sensor part in wireless remote controller>
• Block display of combination of [ ] [ ] [
]
<Display on 7-segment in outdoor unit>
• Unit No. and check code are displayed.
• In a case of error with auxiliary code, the check code and the auxiliary code are displayed alternately.
2. Special mention
• The check code of the remote controller is displayed only while the air conditioner is operating
(Remote controller start button ON).
When the air conditioner stopped and the error has been cleared, the check code display on the remote
controller also disappears.
However, if the error continues after stop of the operation, the check code is immediately displayed with
restarting of the operation.
48
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7-3. Troubleshooting by Check Display on Remote Controller
In case of wired remote controller (RBC-AMT31E)
1. Confirmation and check
CODE No.
When a trouble occurred on the air conditioner,
the check code and the indoor unit No. are
UNIT No.
displayed on the display section of the remote
R.C.
No.
controller.
The check code is displayed while the air condi-
tioner operates.
Check code
Indoor unit No. in which
an error occurred
If the display disappeared, operate the air
conditioner and check the error based upon the
following “Confirmation of error history”.
2. Confirmation of error history
TEMP.
ON / OFF
When a trouble occurred on the air conditioner,
the error history can be confirmed with the
following procedure.
2
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
(Up to 4 error histories are stored in memory.)
FILTER
RESET TEST
This history can be confirmed from either operat-
ing status or stop status.
SET CL
1
3
Procedure
Description
SET
TEST
When pushing
and
buttons simultaneously for 4 seconds or more, the below display appears.
If [Service Check] is displayed, the mode enters in the error history mode.
• [01: Error history order] is displayed in code number window.
• [Check Code] is displayed in check code window.
CODE No.
1
UNIT No.
• [Indoor unit address with error] is displayed in UNIT No.
R.C.
No.
Every pushing temp. set
order.
/
buttons, the error histories stored in the memory are displayed in
The numbers in item code indicates item code [01] (Latest) to [04] (Oldest).
2
3
CAUTION
Do not push [CL] button because all the error histories of the indoor unit will be deleted.
TEST
After confirmation, push
button to return to the usual display.
49
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In case of central remote controller (TCB-SC642TLE)
ZONE
ALL
ZONE
GROUP
CODE
No.
1234
TEST
UNIT No.
SET DATA
SETTING
R.C.
No.
GROUP
SELECT
ZONE
CL SET
1. Confirmation and check
When a trouble occurred on the air conditioner, the check code and the indoor unit No. are displayed on the
display section of the remote controller.
The check code is displayed while the air conditioner operates.
If the display disappeared, operate the air conditioner and check the error based upon the following “Confir-
mation of error history”.
Unit No display
UNIT No.
Alarm display
Alternate flashing display
R.C
No.
2. Confirmation of error history
When a trouble occurred on the air conditioner, the error history can be confirmed with the following proce-
dure. (Up to 4 error histories are stored in memory.)
This history can be confirmed from either operating or stop.
1) Push
and
buttons in succession for 4 seconds or more.
goes on and Item code 01 goes on.
SET
2) SERVICE CHECK
3) When selecting (flash) the group number if there is the alarm history, the UNIT number and the latest
alarm history are displayed alternately.
* In this time, the temperature cannot be set up.
4) To confirm the alarm history other than the latest one, push temp. set
(01 to 04).
/
to select Item code
GROUP
ZONE
5) To confirm the alarm in the other group, push
and
to select the group number
Do not push button because all the alarm histories of the currently selected group are deleted.
CL
6) To finish the service check, push
button.
Unit No display
UNIT No.
Alarm display
Alternate flashing display
R.C
No.
50
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7-4. Check Code and Check Position Displayed on the Remote Controller and Outdoor Unit
(7-Segment Display of Interface)
Check code
Detected
position
Outdoor 7-segment display
Main
remote
Check code name
Status
Error detection condition
Check item (position)
controller
Check code
Auxiliary code
E01
Remote Communication error between
controller indoor and remote controller
(Detected at remote controller side)
Corresponding Communication interrupted between • Check remote controller inter-unit cable (A/B).
—
—
unit only stops. indoor P.C. board and remote
• Check disconnection, connector contact error.
controller.
• Check indoor power supply.
• Check indoor P.C. board error.
• Check remote controller address setup.
(When two remote controllers operate)
• Check remote controller P.C. board.
E02
E03
Remote Remote controller sending error
controller
Corresponding Signal could not be sent from remote • Check the communication wire of remote controller:
—
—
—
—
unit only stops. controller to indoor unit.
Exchange remote controller.
Indoor unit Communication error between
indoor and remote controller
Corresponding No communication from remote
unit only stops. controller (including wireless) and
communication adapter.
• Check remote controller and communication adapter wiring.
(Detected at indoor side)
E04
E06
Indoor unit Indoor/outdoor communication
circuit error
Corresponding Indoor unit does not receive
unit only stops. communication from outdoor unit.
• Check power-ON order of indoor/outdoor.
• Check indoor address setup.
—
—
(Detected at indoor side)
• Check inter-unit cabling between indoor and outdoor.
• Check outdoor end terminal resistance setup (SW30-2).
I/F
I/F
Decreased number of indoor units
All stop
When signal is not sent for a certain • Check the power supply of indoor unit. (Power-ON)
period from the indoor unit which has
E06
No. of indoor units which
received signal normally
• Check connection of communication line between indoor and outdoor.
been used to send signals, [E06] is
normally displayed.
• Check connector connection for communication in indoor P.C. board.
• Check connector connection for communication in outdoor P.C. board.
• Check indoor P.C. board failure.
• Check outdoor P.C. board (I/F) failure.
Indoor/outdoor communication
circuit error
All stop
All stop
Transmission from outdoor to indoor
cannot continue for 30 seconds.
—
—
• Check outdoor terminator resistor setup (SW30-2).
E07
E08
• Check the communication connection between indoor and outdoor.
(Detected at outdoor side)
Duplicated indoor addresses
Multiple indoor unit address setup
are duplicated.
E08
Duplicated indoor
addresses
Indoor
I/F
• Check indoor address.
• Check the change of remote controller connection (Group / individual)
after setup of indoor address.
Duplicated master remote
controllers
Corresponding In 2-remote controller control
unit only stops. (including wireless), both are setup
as master
E09
E10
—
Remote
controller
• Check remote controller setup.
—
—
• Check remote controller P.C. board.
(Header indoor unit stops and other
indoor unit is operating.)
Communication error between
indoor P.C. board assembly
Corresponding There is any trouble in power line.
unit only stops.
Indoor unit
• Indoor P.C. board failure
—
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Check code name
Status
Error detection condition
Check item (position)
Check code
Auxiliary code
E12
E12
01: Indoor/outdoor communication
02: Between outdoors communication
I/F
Automatic address
start error
All stop
• When indoor automatic address started,
other refrigerant circuit system was setting
automatic address.
• Setup the address again after disconnecting communication
connection with other refrigerant circuit system.
• When outdoor automatic address started,
indoor automatic address was executed.
E15
E15
—
I/F
No corresponding
indoor unit during
automatic address
All stop
All stop
Indoor unit is not found when indoor automatic
address start was set up.
•
Check the communication line connection between indoor and outdoor.
• Check the electric power line error in indoor.
• Check the noise of surrounding devices.
• Power failure
• Check indoor P.C. board error.
E16
E16
00: Capacity over
I/F
No. of connected
indoor units /
Capacity over
• Total capacity of indoor units exceeded
135% of total outdoor capacity.
• No. of connected indoor units are more than
48 units.
• Check the connection capacity of indoor unit.
• Check the HP capacity of indoor unit.
• Check the indoor/outdoor capacity setup
• Check the No. of connected indoor units.
• Check the outdoor I/F P.C. board error
01 to: No. of connected units
[Note]
If this code appears after backup setup of
outdoor unit trouble, set up “No. capacity-over
detection”.
<Setup method of“No. capacity-over
detection”>
Turn on SW09/Bit 2 on I/F P.C. board of
outdoor header unit.
E18
E19
—
—
Indoor
unit
Communication error
between indoor header unit only stops. header and follower units
and follower units
Corresponding Regular communication between indoor
• Check cable of the remote controller.
• Check power cabling of indoor.
• Check P.C. board of indoor.
E19
00: No header unit
02: Two or more header units
I/F
Outdoor unit quantity
error
All stop
• There are multiple outdoor units in 1 line.
• There is none of outdoor unit in 1 line.
The outdoor unit connected with communication cable between
indoor and outdoor (U1.U2) is the outdoor unit.
•
Check connection of communication line between indoor and outdoor.
• Check outdoor P.C. board(I/F) error.
E20
E23
E20
E23
01: Connection of outdoor of other line
02: Connection of indoor of other line
I/F
I/F
Other line unit
connected during
automatic address
All stop
All stop
Unit of other line was connected when indoor
automatic address started.
Separate the cable between lines according to automatic address
setup method in “Address setup”.
—
Communication
sending error between
outdoor units
Transmission of other outdoor unit was
unavailable for 30 seconds or more.
In this model, only one outdoor unit is provided to one refrigerant line.
Be sure to check there is no communication connection with outdoor
unit in the other refrigerant line.
E25
E26
E25
E26
Outdoor addresses manually set up are
duplicated.
Note)
—
I/F
I/F
Duplicated outdoor
follower address setup
All stop
All stop
Do not set up the outdoor address manually.
No. of normally received outdoor units
Decreased number of
connected outdoor
units
The signal was not returned for constant from
the outdoor unit which was receiving signal.
In this model, only one outdoor unit is provided to one refrigerant line.
Be sure to check there is no communication connection with outdoor
unit in the other refrigerant line.
E28
E28
Outdoor header unit received error code from
outdoor follower unit.
• Check the check code of outdoor follower unit.
No. of detected outdoor units
I/F
Outdoor follower unit
error
All stop
<Convenient functions>
When pushing SW04 for 1 second or more under condition that [E28] is displayed on 7-segment display of
outdoor header unit, the fan of outdoor unit which stopped abnormally starts rotating.
If pushing SW04 and SW05 simultaneously, the fan of normal outdoor unit operates.
When pushing SW05 singly, the operation of fan is cleared.
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Check code
Detected
position
Main
remote
controller
Check code name
Status
Error detection condition
Check item (position)
Outdoor 7-segment display
Auxiliary code
Check code
E31
E31
01: IPDU1 error
I/F
IPDU communication
error
All stop
Communication of each IPDU (P.C. board) in
inverter box interrupted.
• Check connection of communication connector and
disconnection between IPDU and I/F P.C. board.
02: IPDU2 error
• Check outdoor P.C. board (I/F, IPDU, Fan IPDU) error.
• Check external noise.
03: IPDU1, 2 errors
04: Fan IPDU error
• Check power supply P.C. board for fan error.
05: IPDU1 + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error or communication error
between IPDU and I/F P.C. board or
outdoor I/F P.C. board error
F01
F02
F03
F04
F05
F06
F07
F08
F10
F12
—
—
—
—
—
—
—
—
—
—
—
Indoor unit IndoorTCJ sensor
error
Corresponding • Resistance value of sensor is infinite or zero. • Check connection/cabling of TCJ sensor connector.
unit only stops.
(Open/Short)
• Check characteristics of TCJ sensor resistance value.
• Check indoor P.C. board error.
Indoor unit Indoor TC2 sensor
error
Corresponding • Resistance value of sensor is infinite or zero • Check connection/cabling of TC2 sensor connector.
unit only stops.
(Open/Short).
• Check characteristics of TC2 sensor resistance value.
• Check indoor P.C. board error.
—
Indoor unit Indoor TC1 sensor
error
Corresponding • Resistance value of sensor is infinite or zero • Check connection/cabling of TC1 sensor connector.
unit only stops.
(Open/Short).
• Check characteristics of TC1 sensor resistance value.
• Check indoor P.C. board error.
F04
F05
F06
F07
F08
—
I/F
I/F
TD1 sensor error
TD2 sensor error
TE1 sensor error
TL sensor error
TO sensor error
All stop
• Resistance value of sensor is infinite or zero • Check connection of TD1 sensor connector.
(Open/Short)
• Check characteristics of TD1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
All stop
All stop
All stop
All stop
• Resistance value of sensor is infinite or zero
(Open/Short)
• Check connection of TD2 sensor connector.
• Check characteristics of TD2 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
I/F
• Check connection of TE1 sensor connector.
• Check characteristics of TE1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Resistance value of sensor is infinite or zero
(Open/Short).
I/F
• Check connection of TL sensor connector.
• Check characteristics of TL sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Resistance value of sensor is infinite or zero
(Open/Short).
I/F
• Check connection of TO sensor connector.
• Check characteristics of TO sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Resistance value of sensor is infinite or zero
(Open/Short).
Indoor
I/F
• Check connection/cabling of TA sensor connector.
• Check characteristics of TA sensor resistance value.
• Check indoor P.C. board error.
IndoorTA sensor
error
Corresponding
unit only stops.
• Resistance value of sensor is infinite or zero
(Open/Short).
F12
01: TS1
02: TS2
TS1, TS2 sensor
error
All stop
• Check connection of TS1 or TS2 sensor connector.
• Check characteristics of TS1, TS2 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Resistance value of sensor is infinite or zero
(Open/Short).
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Check code name
Status
Error detection condition
Check item (position)
Check code
Auxiliary code
F13
F15
F13
01: Compressor 1 side
02: Compressor 2 side
IPDU
I/F
TH sensor error
All stop
All stop
• Resistance value of sensor is infinite or zero
(Open/Short).
• IGBT built-in temp sensor error
→ Exchange IPDU P.C. board.
F15
—
Outdoor temp sensor
miscabling (TE1, TL)
During operation of compressor in HEAT mode, the
TE1 detection temp was higher than that of TL by the
specified value continued for 3 minutes or more.
• Check installation of TE1 sensor and TL sensor.
• Check characteristics of TE1 and TL sensor resistance value.
• Check outdoor P.C. board (I/F) error.
F16
F23
—
I/F
I/F
Outdoor pressure sensor
miscabling (Pd, Ps)
All stop
All stop
High-pressure Pd sensor and low-pressure Ps sensor • Check connection of high-pressure Pd sensor connector.
F16
F23
were exchanged, or output voltages of both sensors
are zero.
• Check connection of low-pressure Ps sensor connector.
• Check pressure sensors Pd and Ps error.
• Check outdoor P.C. board (I/F) error.
• Check compression error of compressor.
—
Ps sensor error
Output voltage of Ps sensor was zero.
• Misconnection of Ps sensor and Pd sensor connectors
• Check connection of Ps sensor connector.
• Check Ps sensor error.
• Check compression error of compressor.
• Check 4-way valve error.
• Check outdoor P.C. board (I/F) error.
• Check SV4 circuit error.
F24
—
I/F
Pd sensor error
All stop
Output voltage of Pd sensor was zero. (Sensor Open) • Check connection of Pd sensor connector.
F24
Pd > 4.15MPa during stop of compressor
• Check Pd sensor error.
• Check outdoor P.C. board (I/F) error.
—
—
—
Indoor
I/F
Indoor other error
Corresponding Indoor P.C. board did not operate normally.
unit only stops.
• Check indoor P.C. board error (EEPROM error).
F29
F31
F31
Outdoor EEPROM error
All stop (*1)
Outdoor P.C. board (I/F) did not operate normally.
• Check power voltage.
• Check power noise.
• Check outdoor P.C. board (I/F) error.
H01
H02
01: Compressor 1 side
02: Compressor 2 side
IPDU
IPDU
Compressor breakdown
All stop
Inverter current detection circuit detected over-current • Check power voltage. (AC220–240V ± 10%).
H01
H02
and stopped.
• Check compressor error.
• Check cause of abnormal overload operation.
• Check outdoor P.C. board (IPDU) error.
01: Compressor 1 side
02: Compressor 2 side
Compressor error (lock)
MG-SW error
All stop
Over-current was detected several seconds after
header compressor had started.
• Check compressor error.
• Check power voltage. (AC380–10%, 415V +10%).
• Check cable of compressor and phase-missing.
• Check connector/terminal connection on IPDU P.C. board.
OCR operation
• Check conduction of case heater.
(Check activation error due to liquid stagnation in compressor.)
• Check outdoor P.C. board (IPDU) error.
• Check outdoor MG-SW or OCR.
(*1) All stop only in case of the header unit The follower unit continues operation.
MG-SW : Magnet Switch, OCR : Over-current Relay
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Check code
Detected
position
Outdoor 7-segment display
Main
remote
Check code name
Status
Error detection condition
Check item (position)
controller
Check code
Auxiliary code
H03
H04
H03
01: Compressor 1 side
02: Compressor 2 side
IPDU
I/F
Current detection
circuit system error
All stop
All stop
While header compressor stopped, current flowed • Check cabling of current detection circuit system.
more than the specified current and was detected.
• Check outdoor P.C. board (IPDU) error.
H04
—
Compressor 1 case
thermo operation
Compressor 1 case thermostat performed
protective operation.
• Check compressor 1 case thermo circuit. (Connector, cable, P.C. board)
• Check full opening of service valve. (Gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2, 3)
• Check SV41 circuit leakage.
• Check miscabling/misinstallation of SV41 and SV42.
• Check valve open status of indoor PMV.
• Check 4-way valve error.
• Check refrigerant shortage.
• Check SV5 leak.
• Check SV11 circuit. (Wiring, OFF at one side only)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve.
(Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),
wiring between FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
H06
H06
—
I/F
Low-pressure
protective operation
All stop
Low-pressure Ps detected operation lower than
0.02MPa.
• Check full opening of service valve.
(Discharge gas, suction gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV2 circuit and SV4 circuit error.
• Check low-pressure Ps sensor error.
• Check indoor air filter clogging.
• Check valve open of indoor PMV.
• Check refrigerant pipe clogging.
• Check outdoor fan operation.
(All heating, mainly heating, part cooling operation)
• Check refrigerant shortage.
• Check clogging of circuit at auxiliary heat exchanger side.
(PMV3, SV12, check valve)
• Check 4-way valve error. (Reversal error)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check miswiring of discharge gas/suction gas pipe to FS unit.
Check wiring between FS unit and indoor unit.
Check miswiring of SVD/SVS valves, misinstallation of coil.
Check opened status of SVS valve.
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Check code name
Status
Error detection condition
Check item (position)
Check code
Auxiliary code
H07
H07
—
I/F
Protection for oil
level drop detection
All stop
The operating compressor detected oil shortage <Check all the outdoor units in the corresponding line.>
continuously for 2 hours.
• Check full opening of service valve of balance pipe.
• Check connection and installation of TK1, TK2, TK3, and TK4 sensors.
• Check characteristics of TK1, TK2, TK3, and TK4 resistance values.
• Check gas leak and oil leak in the same line.
• Check refrigerant stagnation in compressor.
• Check error of SV3A, SV3B, SV3C, SV3D, and SV3E valves.
• Check clogging of oil separator oil return circuit.
• Check clogging of oil-equation circuit.
<Check clogging of oil equation pipe between compressors.>
• Check TS1, TS2 sensors (Miswiring and misinstallation of TS1 and TS2)
• Check leakage of SV6 circuit.
• Check FS unit.
Leakage of check valve of bypass between liquid pipe and discharge gas pipe
Mispiping of discharge/suction gas connection
Miswiring of SVD/SVS valve/Misinstallation of coil
• Check whether there is no setup missing of indoor unit in all cooling operation mode
H08
H08
01: TK1 sensor error
02: TK2 sensor error
03: TK3 sensor error
04: TK4 sensor error
I/F
Oil level detective
temp sensor error
All stop
All stop
All stop
All stop
All stop
• Resistance value of sensor is infinite or zero.
(Open/Short)
• Check connection of TK1 sensor connector.
• Check characteristics of TK1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Resistance value of sensor is infinite or zero.
(Open/Short)
• Check connection of TK2 sensor connector.
• Check characteristics of TK2 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Resistance value of sensor is infinite or zero.
(Open/Short)
• Check connection of TK3 sensor connector.
• Check characteristics of TK3 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Resistance value of sensor is infinite or zero.
(Open/Short)
• Check connection of TK4 sensor connector.
• Check characteristics of TK4 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
Compressor 2 case
thermo operation
Compressor 2 case thermostat operated.
• Check compressor 2 case thermo circuit. (Connector, cable, P.C. board)
• Check full opening of service valve. (Gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2)
H14
H14
—
I/F
• Check SV42 valve leak.
• Check miscabling/misinstallation of SV41 and SV42.
• Check valve opening of indoor PMV.
• Check 4-way valve error.
• Check refrigerant shortage.
• Check SV11 circuit. (Wiring, OFF at one side only)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring between
FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Check code name
Status
Error detection condition
Check item (position)
Check code
Auxiliary code
H16
H16
01:TK1 oil circuit system error
02:TK2 oil circuit system error
03:TK3 oil circuit system error
04:TK4 oil circuit system error
I/F
Oil level detective circuit system error
MG-SW error
All stop
Temperature change of TK1 could not be • Check TK1 sensor coming-off.
detected though compressor 1 started
• Check characteristics of TK1 sensor resistance value.
the operation.
OCR operation
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check operation error of SV3E valve.
• Check capillary clogging of oil-equation circuit and operation error
of stop valve.
• Check refrigerant stagnation in compressor.
• Check MG-SW or OCR.
Temperature change of TK2 could not be • Check TK2 sensor coming-off.
detected though compressor 2 started
• Check characteristics of TK2 sensor resistance value.
the operation.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillary clogging of oil equalization circuit and check stop
valve operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
Temperature change of TK3 could not be • Check TK3 sensor coming-off.
detected though compressor started the
• Check characteristics of TK3 sensor resistance value.
operation.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillary clogging of oil-equalization circuit and check valve
operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
Temperature change of TK4 could not be • Check TK4 sensor coming-off.
detected though compressor started the
• Check characteristics of TK4 sensor resistance value.
operation, or the difference from other TK
sensor changed for a constant time only
within the specified range.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillary clogging of oil-equalization circuit and check valve
operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
L03
—
—
Indoor
Duplicated indoor center units
Duplicated outdoor line address
Corresponding There are multiple center units in a group. • Check indoor address.
unit only stops.
• Check the change of remote controller connection
(Group/individual) after indoor address setup.
L04
L05
L04
—
—
—
I/F
I/F
All stop
All stop
Line address setup is duplicated against
the outdoor unit in different refrigerant
pipe system.
• Check line address.
Duplicated indoor units with priority
(Displayed on indoor unit with priority)
Indoor units with priority were duplicated. • Check display of indoor unit with priority.
MG-SW : Magnet Switch, OCR : Over-current Relay
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Auxiliary code
Check code name
Status
Error detection condition
Check item (position)
Check code
L06
L07
L08
L06
No. of indoor units with priority
I/F
Duplicated indoor units with priority
(Displayed on the unit other than
indoor unit with priority)
All stop
Indoor units with priority were
duplicated.
• Check display of indoor unit with priority and outdoor unit.
—
—
—
Indoor
Indoor
Group line in individual indoor unit. Corresponding At least one indoor unit connected
unit only stops. to a group existed in the individual
indoor units.
• Check indoor address.
L08
Indoor group / address unset
Corresponding Address was not yet set up.
unit only stops.
• Check indoor address.
Note)
After installation, this code is displayed when the power is firstly
turned on.
L09
L10
—
—
—
Indoor
I/F
Indoor capacity unset
Outdoor capacity unset
Corresponding Indoor unit capacity was unset.
unit only stops.
Set up indoor capacity. (DN=11)
L10
All stop
On the I/F P.C. board for service,
jumper line was not cut according to
the model.
Check model setup on outdoor I/F P.C. board A’ssy for service.
L17
L18
L17
L18
—
I/F
I/F
Inconsistent models of outdoor
units
Outdoor units of 1 series and those • Check outdoor units.
of 2 series were mixed.
Corresponding indoor address
FS unit system error
Corresponding An indoor unit which is not
unit only stops. connected with FS unit is driving
without setup for cooling only mode.
• Check setup of remote controller (DN=[OFF]).
• Check FS unit.
Check pipe connection to FS unit.
(Mispiping between discharge gas and suction gas)
Check miswiring/misinstallation of SVS/SVD valves.
L20
L28
—
—
—
Indoor
I/F
Duplicated central control
addresses
All stop
All stop
Duplicated central control
addresses
• Check central control address.
• Check network adaptor P.C. board. (In case of AI-NET)
L28
Quantity over of connected outdoor
units
There were more than four outdoor • Check No. of connected outdoor units.
units.
(Max. 4 units per 1 system)
• Check communication line between outdoor units.
• Check outdoor P.C. board (I/F) error.
L29
L29
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 errors
04: Fan IPDU error
05: IPDU1 + Fan IPDU error
06: IPDU2 + Fan IPDU error
I/F
IPDU quantity error
All stop
No. of IPDU units detected when
power was turned on were less.
• Check model setup for outdoor I/F service P.C. board.
• Check connection of UART communication connector.
• Check IPDU, fan IPDU, and I/F P.C. board error.
Note)
UART: Universal Asynchronous Receiver Transmitter
07: All IPDU error or communication
error between IPDU and I/F P.C.
board, or outdoor I/F P.C. board error
L30
L30
L31
Detected indoor address
Indoor
Interlock in indoor unit from outside Corresponding • Outside error input terminal
n Outside device is connected to connector (CN80):
1) Check outside device error.
2) Check indoor P.C. board error.
unit only stops.
Detected signal to (CN80) for
more 1 minute
n Outside device is not connected to connector (CN80):
1) Check indoor P.C. board error.
Check indoor (I/F) P.C. board.
—
—
I/F
Extended IC (Integrated Circuit)
error
Operation
continues.
P.C. board (I/F) parts error
Check indoor (I/F) P.C. board.
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Check code name
Status
Error detection condition
Check item (position)
Check code
Auxiliary code
P01
P03
—
—
Indoor
I/F
Indoor fan motor error
Corresponding
unit only stops.
• Check the lock of fan motor (AC fan).
• Check cabling.
P03
—
Discharge temp TD1 error
All stop
Discharge temp (TD1) exceeded 115°C. • Check full opening of outdoor service valves (Gas side, Liquid side).
• Check clogging of outdoor PMV. (PMV1,2)
• Check characteristics of TD1 sensor resistance value.
• Check refrigerant shortage.
• Check 4-way valve error.
• Check leakage of SV41 circuit.
• Check SV4 circuit. (Miswiring and misinstallation of SV41 and SV42)
• Check leakage of SV5 circuit.
• Check leakage of SV6 circuit. (Capillary clogging, valve operation error)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve.
(Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),
wiring between FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
P04
P04
01: Compressor 1 side
02: Compressor 2 side
I/F
Actuation of high-pressure
SW
All stop
High-pressure SW actuated.
• Check Pd pressure sensor error.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check short-circuiting of outdoor suction/discharge air.
• Check clogging of SV2 circuit.
• Check outdoor P.C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of check valve of discharge pipe.
• Check SV4 valve circuit.
• Check SV5 valve circuit.
• Check refrigerant overcharge.
• Check mispiping of discharge gas/suction gas main pipe.
• Check circuit clogging at auxiliary heat exchanger side.
(PMV3, SV12, check valve)
• Check FS unit.
Check clogging of SVD valve and operation error.
Check wiring inside of FS unit. (SVD/SVS coil miswiring, etc.)
Check wiring between FS unit and indoor unit.
(Miswiring, Disconnection, Wiring missing)
P05
P05
01: Power supply open phase
I/F
Open phase negative
phase
All stop
• Open phase was detected when the
power turned on.
• Check outdoor power line.
02: Power supply negative phase
• Check outdoor P.C. board (I/F) error.
• Negative phase was detected when
the power turned on.
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Check code
name
Status
Error detection condition
Check item (position)
Check code
Auxiliary code
P07
P10
P12
P13
P07
P10
—
01: Compressor 1 side
02: Compressor 2 side
IPDU
I/F
Heat sink overheat
error
All stop
IGBT built-in temp sensor (TH) was
overheated.
• Check power voltage.
• Check outdoor fan system error.
• Check clogging of heat sink cooling duct.
• Check fixation between IGBT and heat sink. (Check screwing and contact.)
• Check IPDU error.(IGBT built-in temp sensor (TH) error).
Indoor address with
trouble
Indoor
Indoor
I/F
Indoor overflow
error
All stop
• Float switch operated.
• Float switch circuit disconnected or the
connector came off.
• Check the float switch connector.
• Check operation of drain pump unit.
• Check the drain pump circuit.
• Check clogging of drain pipe.
• Check indoor P.C. board error.
—
—
Indoor fan motor
error
Corresponding • The value of motor speed deviated from
unit only stops.
• Check connection of fan connector and wiring.
• Check fan motor error.
• Check indoor P.C. board error.
• Check influence of outside air control.
• Check indoor type code (DN=10) and the capacity code (DN=11).
target value was detected for certain time.
• Over-current protection operated.
P13
Outdoor liquid
back detection
error
All stop
<In heating>
• Check full close operation of outdoor PMV (1, 2).
While the system is operating in HEAT mode, • Check Pd and Ps sensor error.
outdoor PMV of which opening degree was
100 pulse or less for a certain time.
• Check clogging of SV2 circuit.
• Check clogging of 4-way valve error circuit.
• Check outdoor P.C. board (I/F) error.
• Check capillary clogging of oil return circuit from oil separator.
• Check TS1, TS2 sensor error.
P15
P15
01: TS condition
I/F
Gas leak detection
(TS1 condition)
All stop
Suction temp exceeded the judgment
standard temp for 10 minutes or more.
• Check refrigerant shortage.
• Check full open of outdoor service valves (gas side, liquid side).
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TS1 sensor resistance value.
• Check 4-way valve error.
<TS error judgment standard temperature>
In cooling operation: 60°C or higher
In heating operation: 40°C or higher
• Check leakage of SV4 circuit.
• Check leakage of SV5 circuit.
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),
wiring between FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
Discharge temperature TD1 or TD2 was
continuously 108°C or higher for 10 minutes.
02: TD condition
I/F
Gas leak detection
(TD condition)
All stop
• Check refrigerant shortage.
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TD1, TD2 sensor resistance value.
• Check indoor air filter clogging.
• Check pipe clogging.
• Check SV4 circuit (Valve leakage, misinstallation)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),
wiring between FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
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Check code
Detected
position
Main
remote
controller
Outdoor 7-segment display
Check code name
Status
Error detection condition
Check item (position)
Check code
Auxiliary code
P17
P17
—
I/F
Discharge temp
TD2 error
All stop Discharge temperature (TD2)
exceeded 115°C.
• Check full opening of outdoor service valves (gas side, liquid side).
• Check clogging of outdoor PMV (PMV1, 2).
• Check characteristics of TD2 sensor resistance value.
• Check 4-way valve error.
• Check leakage of SV42 circuit.
• Check SV4 circuit. (Miscabling and misinstallation of SV41 and SV42)
• Check leakage of SV5 valve circuit.
• Check SV6 circuit. (Clogging, Valve operation error)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring between FS unit
and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
P19
P19
Detected outdoor unit No.
I/F
4-way valve
operation error
All stop When abnormal refrigerating cycle • Error of 4-way valve error.
data was detected in heating
• Check coil error and connector connection of 4-way valve.
• Check characteristics of TS1/TE1 sensor resistance value.
• Check characteristics of Pd, Ps pressure sensor output voltage.
• Check misconnection of TE1 and TL sensors.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas).
P20
P20
—
I/F
High-pressure
protective operation
All stop Pd sensor detected 3.6MPa or
more.
• Check Pd pressure sensor error.
• Check full opening of service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check air short-circuiting in outdoor unit.
• Check clogging of SV2 circuit.
• Check outdoor P.C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check valve opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of check valve of discharge pipe.
• Check circuit of gas balance SV4 valve.
• Check mispiping of discharge gas/suction gas main pipe.
• Check operation error of check valve of discharge gas pipe.
• Check circuit of SV11 valve. (Clogging, OFF at one side only)
• Check clogging of circuit at auxiliary heat exchanger side. (Miswiring, Disconnection, Wiring missing)
• Check Flow selector unit.
Check leakage of SVD valve and operation error.
Check wiring inside of FS unit. (SVD/SVS coil miswiring, etc.)
Check wiring between FS unit and indoor unit. (Miswiring, Disconnection, Wiring missing)
• Check circuit of SV5 valve.
• Check refrigerant overcharge.
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Check code
Detected
position
Outdoor 7-segment display
Main
remote
Check code name
Status
Error detection condition
Check item (position)
controller
Check code
Auxiliary code
0: IGBT shortage
P22
P22
FAN-IPDU Outdoor fan IPDU error
All stop
(Auxiliary code: 0)
• Check fan motor. (Interphase short-circuit)
1: Position detection circuit error
3: Motor lock error
• Short-circuit current was detected at start time. • Check fan IPDU error.
• Short-circuit current was detected when
checking IGBT short-circuit before start time.
4: Motor current error detection
C: TH sensor temp. error
D: TH sensor error
All stop
All stop
(Auxiliary code: 1)
• Check fan IPDU error.
• The standard value of detection circuit of fan
IPDU current fluctuated at start time.
E: Vdc error
(Auxiliary code: 3)
• Check fan motor. (Lock, phase missing)
• Abnormal current was detected within 30
seconds after start time.
• Check cause of abnormal overload at start time.
• Check connection of connector to fan motor.
All stop
All stop
(Auxiliary code: 4)
• Check power supply voltage.
• Check fan IPDU error.
• Short-circuit current was detected when
2 seconds or more passed after start time.
• Over-current was detected when 30 seconds
or more passed after start time.
(Auxiliary code: C)
• Check outdoor fan system.
• Heat sink sensor (TH) of fan IPDU detected
95°C error.
• Check fan IPDU error.
• Check fixation between fan IPDU and heat sink.
All stop
All stop
(Auxiliary code: D)
• Check fan IPDU error.
• Heat sink sensor (TH) of fan IPDU detected
short-circuiting or open.
(Auxiliary code: E)
• Check input power supply voltage of the fan IPDU.
• Check power supply P.C. board error of the fan IPDU.
• Check error of external electrolytic condenser.
• Input power supply voltage of the fan IPDU
over the setup value was detected.
• Input power supply terminal of the fan IPDU
was unconnected.
• Power supply P.C. board error of the fan IPDU
P26
P29
P31
P26
P29
—
01: Compressor 1 side
02: Compressor 2 side
IPDU
IPDU
Indoor
G-Tr short-circuit
protection error
All stop
All stop
Instantaneous over-current was detected when
compressor started.
•
Check connector connection and wiring on IPDU P.C. board.
• Check compressor error and defect of compressor coil.
• Check outdoor P.C. board (IPDU) error.
01: Compressor 1 side
02: Compressor 2 side
Compressor position
detection circuit error
Position was not normally detected.
• Check connector connection and wiring.
• Check compressor error and defect of compressor coil.
• Check P.C. board (IPDU) error.
—
Other indoor error
Corresponding E07/L07/L03/L08 was detected when other
• Check indoor P.C. board.
(Group follower unit error) unit only stops. indoor unit in the group was defective.
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Error detected byTCC-LINK central control device
Check code
Outdoor 7-segment display
Check code Auxiliary code
Display on
central control
device
Detected position
Check code name
Status
Error detection condition
Check item (position)
C05
—
TCC-LINK
TCC-LINK central control Operation Signal is not transmit from
device transmission error continued. central control device.
• Check central control device error.
• Check communication line error of central control device.
• Check setup of terminator resistor.
C06
—
TCC-LINK central control Operation Signal is not received from
• Check central control device error.
device receiving error
continued. central control device.
• Check communication line error of central control device.
• Check setup of terminator resistor.
• Check the power of connecting destination connected device.
• Check P.C. board error of the connected device.
C12
P30
—
HA control interface Interface batch alarm of
HA control interface
Operation Error was input in HA control
continued. interface
• Check error input.
TCC-LINK
Follower unit error of
group control
Operation An error occurred in follower
continued. unit of the group control.
([P30] is displayed only on the
• Check the check code of the unit with alarm.
Differs according to error contents of the with alarm
(L20 is displayed.)
central remote controller.)
Duplicated central control Operation Central control addresses
address continued. were duplicated.
• Check the address setup.
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Cautions when servicing for compressor
1. Removing wires of both compressors check output of the inverter as described below.
How to check inverter output
1. Turn off the power supply.
2. Remove the compressor lead cables from the compressors.
(Be sure to remove lead cables of both compressors.)
3. Turn on the power supply and start cooling or heating operation.
In this time, pay attention to touch the fasten receptacle terminal lug of the compressor leads so that they do
not contact with other fasten receptacle terminal lug or other position (unit cabinet, etc.).
4. Check output voltage of compressor lead cable at inverter side.
When the output voltage does not satisfy the criteria in the following table, replace IPDU P.C. board.
No.
1
Measured position
Between Red and White
Between White and Black
Between Black and Red
Criteria
400 V to 650 V
400 V to 650 V
400 V to 650 V
2
3
* After checking the output, when connecting the compressor lead again to the compressor terminal, check
surely there is no distortion on the fasten terminal lug. If it is loosened, caulk it with pinchers, etc and then
connect lead to the terminal.
How to check resistance of compressor winding
1. Turn off the power supply.
2. Remove the compressor lead cables from the compressors.
In each compressor, check the winding resistance between phases and resistance of the outdoor cabinet
using a tester.
• Is not it earthed?
→ Normal if 10MΩ or more are measured
• Is not shorted between windings?
→ Normal if 0.7Ω to 0.9Ω are measured (Use a precise digital tester.)
How to check the outdoor fan motor
1. Turn off the power supply.
2. Take off three connectors (U.V.W) from the fan IPDU P.C. board.
3. Turn the fan with hands. If the fan does not turn, it is a fan motor error (Lock). Replace the fan motor.
If the fan turns, measure the winding resistance between the phases of the connector (Motor winding) with a
tester. If 13 to 33Ω are measured, it is normal. (Use a digital tester.)
64
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7-5. Diagnosis Procedure for Each Check Code
Check code
[E03]
Check code name
Cause of operation
Communication error between
indoor and remote controller
(Detected at indoor side)
No communication from remote controller and
communication adaptor
Check code
[E01]
Check code name
Cause of operation
Communication error between
indoor and remote controller
(Detected at remote controller side)
1. Remote controller inter-unit cable error
2. Indoor power error
3. Indoor P.C. board error
This error is detected when the indoor unit cannot receive a signal from the remote controller.
Check communication wires of the remote controllers A and B.
As communication is impossible, this check code [E03] is not displayed on the main remote controller.
It is displayed on TCC-LINK central controller.
4. Remote controller address setup error
5. Remote controller P.C. board error
NO
Is the inter-unit cable of
remote controllers (A/B) normal?
Correct inter-unit cable of
remote controller.
YES
Check code
[E04]
Check code name
Cause of operation
Is there no disconnection or
connector contact error on harness out
of terminal block of indoor unit?
YES
Correct connector connection
and check circuit cabling.
Indoor/Outdoor
communication circuit error
(Detected at indoor side)
1. Power of outdoor unit was firstly turned on.
2. Connection error of communication line
between indoor and outdoor
NO
3. End terminal resistance setup error on
communication between indoor and outdoor
NO
Is a group control operation?
YES
4. Address setup error
NO
Was power turned on in order
Turn on power again in order of
NO
Check power connection status of
indoor unit. (Turn on power again.)
Is power of each indoor unit turned on?
YES
of indoor unit
outdoor unit?
indoor unit
outdoor unit.
YES
NO
NO
Is connection (U1/U2 terminals) of
indoor/outdoor inter-unit wire normal?
NO
Is power applied to remote controller?
AB terminals: Approx. DC18V
Check indoor P.C. board.
Correct inter-unit wire.
Defect
Replace
YES
YES
YES
Is setup of two remote controllers
without main remote controller?
Change one to main/other to sub.
(Remote controller address connector)
Is connector connection from
U1/U2 terminals of indoor/outdoor
inter-unit wire normal?
Correct connector connection.
NO
YES
Check remote controller P.C. board.
Defect
Replace
NO
NO
Is the end terminal resistance
setup of outdoor unit normal?
Correct the end terminal resistance setup.
Set up address again.
YES
Is address setup correct?
YES
Check code
[E02]
Check code name
Cause of operation
Remote controller sending error Signal could not be sent to indoor unit.
Check the communication wire of the remote
controller.
Check connection of inter-unit wire between
indoor and outdoor is correct, and then
connect communication line connector on
indoor P.C. board (CN40) to CN44 (EMG).
NO
Is power applied to fuse (F03)
on indoor P.C. board?
* It is not displayed on 7-segment display of the central control controller.
YES
NO
Is communication cabling between
Correct the communication cabling.
YES
remote controller and indoor unit correct?
Is there no noise, etc?
NO
Check noise, etc, and eliminate it if any.
YES
Sending circuit error
inside of the remote controller
Replace remote controller.
Check indoor P.C. board.
Defect
Replace
For details, refer to “Troubleshooting in test operation”.
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Check code
[E06]
Check code name
Cause of operation
Check code
[E07]
Check code name
Cause of operation
Decreased number of indoor units 1. Communication lines (U1, U2) connection
Indoor/Outdoor
communication circuit error
(Detected at outdoor side)
1. Indoor/outdoor communication end terminal
resistance setup error
error between indoor and outdoor
2. Connector connection error of communica-
tion for indoor P.C. board
2. Indoor/outdoor communication connection
error
3. Connector connection error of communica-
tion for outdoor I/F board
NO
4. Power supply of indoor unit
(Is power turned on?)
Is setup of end terminal resistance
of outdoor unit normal?
YES
Auxiliary code : No. of indoor units which received signals normally
Correct setup of end
terminal resistance.
YES
Is inter-unit cable (U1, U2) between
indoor and outdoor short-circuited?
Is there no miscabling/
disconnection on communication line
betweenindoor and outdoor?
YES
Correct communication line.
NO
NO
NO
Is connection of inter-unit wire
between indoor and outdoor correct?
Correct short-circuit.
NO
YES
Is connection of CN40 connector
on indoor P.C. board normal?
YES
Correct
communication line.
NO
NO
Is connection of CN01 connector
on outdoor I/F P.C. board normal?
Correct cabling of cable connector.
YES
NO
YES
Is there no error on
Is F400 (fuse) on
power wire to outdoor unit?
I/F P.C. board opened?
NO
YES
Is power of indoor turned on?
YES
Turn on power of indoor unit.
Clear the check code.
* Check conduction
with tester.
Correct power wire.
NO
Did a power failure occur?
YES
Turn on power to
start operation.
YES
Is there noise source?
NO
YES
Is there no noise, etc?
NO
Check noise, etc, and eliminate it if any.
Eliminate noise.
Check indoor P.C. board.
(NOTE)
Defect
Replace
I/F P.C. board failure
1. When signal is not sent for a certain period from the indoor unit
which has used to send signals normally, [E06] is displayed.
However an emergent operation is
available by inserting connector to
be connected to CN01 to CN33.
Outdoor I/F P.C. board failure
Replace
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Check code
[E08]
Check code name
Cause of operation
Check code
[E12]
Check code name
Cause of operation
Duplicated indoor addresses
Indoor addresses are duplicated.
Automatic address start error
1. When indoor automatic address started,
other refrigerant circuit system was setting
automatic address. (Sub code : 01)
2. When outdoor automatic address started,
the indoor automatic address was being
set. (Sub-code: 02)
Auxiliary code : Duplicated indoor address
Using a main remote controller (RBC-AMT21E), check the setup item codes (DN code) 12, 13, and 14.
When there is no address duplication, check to the following flowchart.
Auxiliary code : 01: Communication between indoor and outdoor 02: Communication between outdoor units
NO
Are U1, U2, U3, and U4
connectors connected?
NO
Is cable connection to
communication line normal?
Correct wire connection.
YES
YES
Turn on power of
Disconnect connector connection
of U1, U2, U3, and U4.
Set up address again.
YES
NO
Is not communication line connected
to the different outdoor unit?
outdoor unit again.
(Refer to “Address setup procedure”.)
NO
Is indoor unit quantity connected
to outdoor unit correct?
Correct communication line.
Check code
[E15]
Check code name
Cause of operation
No corresponding indoor unit
during automatic address
1. Communication line connection error
between indoor and outdoor.
YES
2. Indoor power system error
3. Noise from surrounding devices
4. Power failure
Set up indoor address again.
5. Indoor P.C. board error
NO
NO
Is communication line between
indoor and outdoor normal?
Check code
[E09]
Check code name
Cause of operation
Correct communication line.
Duplicated master
remote controller
Setup of master remote controller is dupli-
cated.
YES
Is connection of CN40 connector
on indoor P.C. board correct?
Correct connection of connector.
YES
Are two remote controllers set up
as two master remote controllers?
Correct setup of remote controllers as a master:
a other. (Remote controller address connector)
YES
NO
Is connection of CN01
connector on I/F P.C. board of
header outdoor unit correct?
NO
Check remote controller P.C. board.
Correct connection of connector.
Correct power wire.
Failure
Replace
YES
YES
Is there any connection
error of power wire?
NO
Check code
[E10]
Check code name
Cause of operation
YES
YES
Set up address again after
resetting power supply.
Communication error
in indoor P.C. board A’ssy
Indoor P.C. board error A’ssy failure
Did a power failure occur?
NO
YES
Check power voltage on line.
Eliminate noise, etc.
Eliminate noise.
Is there no noise source?
NO
Is there any trouble on power line?
NO
Set up address again
after resetting power supply.
Check indoor control P.C. board.
Failure
Replace
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Check code
[E16]
Check code name
Cause of operation
Check code
[E18]
Check code name
Cause of operation
Connected indoor units
capacity over
1. There are 48 or more connected indoor units.
2. Capacity over of total connected indoor units.
3. Incorrect setup of indoor/outdoor capacity
Communication error between
indoor header and follower
Regular communication between indoor header
and follower is unavailable.
NO
Are remote controller
inter-unit wires (A/B) normal?
Correct remote controller
inter-unit wire.
Auxiliary code : 00 : Capacity over 01 : ~ : Number of connected indoor units
YES
YES
Perform setup of no detection
for capacity over.
Is backup operation of outdoor unit being set up?
Is there any disconnection of
connector or wiring from terminal block
of indoor unit?
YES
Correct connection of connector.
Check circuit wire.
NO
NO
NO
Excessive indoor units are connected.
Correct miswiring.
NO
Is No. of connected indoor units correct?
YES
Is a group control operation?
YES
NO
NO
NO
Check power connection status
of indoor unit.
Are powers of
Is setup of indoor unit HP correct?
YES
Correct HP setup.
all indoor units turned on?
YES
Check indoor P.C. board.
Check indoor address.
Is total capacity of connected
indoor units within 135%? ( 1)
Set capacity of connected
indoor units within 135% of outdoor units.
Failure
Replace
YES
Correct indoor address.
OK
For a service P.C. board, check outdoor HP setup.
(Set up jumper 9, 10, 11, and 12.)
Set up outdoor HP.
(Refer “How to exchange interface P.C. board”.)
NG
Check code
[E19]
Check code name
Cause of operation
Check outdoor interface P.C. board A’ssy.
(∗1) When capacity of the outdoor unit is 12HP,
up to the maximum capacity 120% of
indoor units can be connected.
Header outdoor units quantity error 1. Misconnection of inter-unit cable between
indoor and outdoor
2. Outdoor I/F P.C. board error
Auxiliary code : 00: No header unit 02: Two or more header units
Are not communication lines (U1, U2)
between indoor and outdoor connected
to multiple outdoor units?
YES
NO
Connect communication line between indoor
and outdoor to one unit per 1 system.
NO
Connect communication line between indoor
and outdoor.
Is communication line between indoor and
outdoor connected to one unit per 1 system?
YES
Check I/F board.
Reference)
When the power supply of the outdoor unit is firstly
turned on, the check code [E19 00] is displayed until the
power supplies of the indoor units are turned on. However
it is not an error. If the power supplies of the indoor units
are turned on, the check code is automatically reset.
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Check code
[E20]
Check code name
Cause of operation
Check code
[E25]
Check code name
Cause of operation
Unit connected to other line
during automatic address
When starting automatic indoor address, a
device in other line is connected.
Duplicated address setup of
terminal outdoor units
Addresses are duplicated by manual setting of
outdoor address
Auxiliary code : 01: Connection of outdoor in other line 02: Connection of indoor unit in other line
Never set up the outdoor address manually.
Separate the wire between lines according to address setup method.
Check code
[E26]
Check code name
Cause of operation
Decrease of connected
outdoor units
1. Outdoor unit backup setup
2. Outdoor power error
Check code
[E23]
Check code name
Cause of operation
3. Communication line connection error between
outdoor units
Communication sending error
between outdoor units
1. Inter-unit cable connection error between
outdoor units
4. Connector connection error for communication
5. Outdoor I/F P.C. board error
2. Communication connector connection error
between outdoor units, I/F P.C. board error
3. End terminal resistance setup error between
outdoor units
Auxiliary code : No. of outdoor units which received signals normally
YES
Is outdoor unit setting backup?
Clear the error, and then start operation. ( 1)
Turn on the main power supply.
Is there no miscabling or
YES
disconnection on communication line
between outdoor units? ( 1)
Correct communication line.
NO
NO
Is main power of follower unit turned on?
NO
YES
NO
Is connection of CN03 connector
on outdoor I/F P.C. board normal?
NO
Is communication line between
Correct cabling of cable connector.
Turn on main power of outdoor unit.
Correct connection of communication line.
outdoor units connected normally?
YES
YES
NO
Is communication connector (CN03)
between follower outdoor units connected?
Correct connector connection.
(Communication connector: CN03)
YES
Is not main power of
outdoor unit turned off?
YES
NO
Check I/F P.C. board.
(∗1) How to clear the error
Set SW01/SW02/SW03 on I/F P.C. board of header unit to 2/16/1, and
push SW04 for 5 seconds or more. (7-segment display: [Er.] [CL])
Is the end terminal resistance
between outdoor units turned on?
(SW30 Bit 1)
NO
Turn the end terminal resistance to ON.
• In this model, only one outdoor unit is provided to one refrigerant line. Be sure to check there is no communication
connection with outdoor unit in the other refrigerant line.
YES
YES
YES
Did power failure occur?
NO
Clear check code.
Check code
[E28]
Check code name
Cause of operation
Terminal unit error
Terminal outdoor unit error
Is there no noise source, etc?
NO
Check and eliminate noise, etc
Auxiliary code : Detected outdoor unit number
Check outdoor I/F P.C. board.
SAn error occurred on the terminal unit. Confirm the check code of the terminal unit using 7-segment display on the
I/F P.C. board of the terminal unit and check it according to the diagnostic procedure for each check code.
<How to specify the terminal outdoor unit on which error occurred>
Under condition that [E28] is displayed on the 7-segment display of the header unit, when pushing SW04 for 1
second or more, the fan of the outdoor unit which stopped due to the error rotates. If pushing SW05 alone, fan
running is released.
(∗1) In this model, only one outdoor unit is provided to
one refrigerant line. Be sure to check there is no
communication connection with outdoor unit in the
other refrigerant line.
Defect
Replace
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Check code
[E31]
Check code name
Cause of operation
Check code
[F01]
Check code name
Cause of operation
TCJ sensor Open/Short
IPDU communication error
1. Connection error of communication line
between IPDU and I/F P.C. board
IndoorTCJ sensor error
2. I/F P.C. board error
3. IPDU P.C. board error
4. External noise
NO
Is TCJ sensor connector (CN102: Red)
on indoor P.C. board normally connected?
Correct connection of connector.
YES
Auxiliary code :
01: IPDU1 error
02: IPDU2 error
NO
Are characteristics of TCJ sensor
resistance value normal?
03: IPDU1, 2 error
05: IPDU1, fan IPDU error
04: Fan IPDU error
06: IPDU2, fan IPDU error
Replace TCJ sensor.
07: All IPDU error or communication line error between IPDU-I/F P.C. boards, or outdoor I/F P.C. board error
YES
Indoor unit temperature sensor characteristics
See Characteristics-2.
∗ If the fan IPDU is abnormal, be sure to check the voltage output on the fan power supply P.C. board.
Check indoor main P.C. board.
Defect
Replace
NO
Is jumper lead setup of the outdoor I/F P.C. board correct?
Connect the jumper lead.
(Jumper 7, 8, 9 ON)
YES
Check code
[F02]
Check code name
Cause of operation
TC2 sensor Open/Short
Are communication connectors
between I/F, fan power supply board,
and IPDU connected?
YES
YES
NO
IndoorTC2 sensor error
Correct connection of connectors.
Replace communication line.
I/F P.C. board error
NO
NO
Is TC2 sensor connector (CN101: Black)
on indoor P.C. board normally connected?
Correct connection of connector.
Is there no disconnection of communication line
between I/F, fan power supply board, and IPDU?
YES
NO
NO
Are characteristics of TC2 sensor
resistance value normal?
Is there voltage deflection between
4 and 5 pins of CN600 on I/F P.C. board?
(Measurement with tester: DC 0 to 5V, 5 pin GND)
Replace TC2 sensor.
YES
Indoor unit temperature sensor characteristics
See Characteristics-2.
YES
Check indoor main P.C. board.
Is there voltage deflection between
3 and 5 pins of CN600 on I/F P.C. board?
(Measurement with tester: DC 0 to 5V, 5 pin GND)
NO
Defect
Replace
IPDU P.C. board error
YES
When IPDU (No.1, No.2) and
three fan IPDU do not return communication
Check code
[F03]
Check code name
Cause of operation
TC1 sensor Open/Short
IndoorTC1 sensor error
On the fan power supply P.C. board,
NO
1) CN503: Between 1 and 5 pins
2) CN503: Between 2 and 5 pins
12V
7V
Replace fan power supply P.C. board.
3) Between +5V and GND at the side of CN505: 5V
NO
Is TC1 sensor connector (CN100: Brown)
on indoor P.C. board normally connected?
YES
Correct connection of connector.
P.C. board to be replaced
IPDU1
Auxiliary code
Replace P.C. board according to auxiliary code.
YES
01
02
03
04
05
06
07
IPDU2
NO
Are characteristics of TC1 sensor
resistance value normal?
Replace TC1 sensor.
IPDU1, 2
Fan IPDU
YES
Indoor unit temperature sensor characteristics
See Characteristics-2.
IPDU1, fan IPDU
IPDU2, fan IPDU
IPDU1, 2, fan IPDU, I/F
Check indoor main P.C. board.
Defect
Replace
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Check code
[F04]
Check code name
TD1 sensor error
Cause of operation
TD1 sensor Open/Short
Check code name
[F10]
Check code name
Cause of operation
TA sensor Open/Short
IndoorTA sensor error
This error code means detection of Open/Short of TA sensor. Check disconnection of circuit for connection of connec-
tor (TA sensor: CN104, Yellow) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature
sensor characteristics.)
This error code means detection of Open/Short of TD1 sensor. Check disconnection of circuit for connection of
connector (TD1 sensor: CN502, White) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace indoor P.C. board.
If sensor is normal, replace outdoor I/F P.C. board.
Check code
[F05]
Check code name
TD2 sensor error
Cause of operation
TD2 sensor Open/Short
Check code name
[F12]
Check code name
TS sensor error
Cause of operation
TS1, TS2 sensor Open/Short
Auxiliary code : 01: TS1 sensor 02 : TS2 sensor
This error code means detection of Open/Short of TD2 sensor. Check disconnection of circuit for connection of
connector (TD2 sensor: CN503, Pink) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
This error code means detection of Open/Short of TS sensor. Check disconnection of circuit for connection of
connector (TS1 sensor: CN504, White TS2 sensor: CN522, Black) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
If sensor is normal, replace outdoor I/F P.C. board.
Check code
[F06]
Check code name
TE1 sensor error
Cause of operation
TE1 sensor Open/Short
Check code name
[F13]
Check code name
TH sensor error
Cause of operation
IGBT built-in sensor error in A3-IPDU
This error code means detection of Open/Short of TE1 sensor. Check disconnection of circuit for connection of
connector (TE1 sensor: CN505, Green) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side
If sensor is normal, replace outdoor I/F P.C. board.
This error code means IGBT built-in temperature sensor error.
Check connection of connectors CN06 on IPDU P.C. board and CN600 on I/F P.C. board.
If sensor is normal, replace IPDU P.C. board.
Check code name
[F07]
Check code name
TL sensor error
Cause of operation
TL sensor Open/Short
This error code means detection of Open/Short of TL sensor. Check disconnection of circuit for connection of connec-
tor (TL sensor: CN521, White) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
Check code name
[F08]
Check code name
TO sensor error
Cause of operation
TO sensor Open/Short
This error code means detection of Open/Short of TO sensor. Check disconnection of circuit for connection of
connector (TO sensor: CN507, Yellow) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
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Check code name
[F15]
Check code name
Cause of operation
Check code name
[F23]
Check code name
Ps sensor error
Cause of operation
Outdoor temp sensor miscabling 1. Misinstallation and misconnection of TE1
Output voltage error of Ps sensor
sensor and TL sensor
(TE1,TL)
2. Resistance characteristics error of TE1
sensor and TL sensor
NO
3. Outdoor P.C. board (I/F) error
Is connection of Ps sensor
connector correct?
Correct connection of connector.
Connector: CN500, White
NO
NO
YES
Are installed positions of
Correct installed positions of
TE1 sensor and TL sensor.
TE1 sensor and TL sensor correct?
Outdoor I/F P.C. board
TE1 sensor : CN505, Green
TL sensor : CN521, White
Are output voltage characteristics
of Ps sensor normal?
Sensor error
YES
YES
NO
1 Pressure (Check joint) by pressure gauge
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
Are connection of TE1 sensor connector
and TL sensor connector normal?
Correct connection of connectors.
If 1 and 2, 3 are different, an error of pressure sensor itself is considered.
If 2 and 3 are different, check interface P.C. board.
YES
NO
Are resistance characteristics of
Is not refrigerant by
passed from discharge to
suction of 4-way valve?
NO
NO
Correct connection of connectors.
Is there no leakage
from SV4 valve?
TL sensor and TE1 sensor normal?
Check compressor.
YES
Outdoor unit temperature sensor characteristics
YES
YES
See TE1 sensor : Characteristics-5.
See TL sensor : Characteristics-3.
Replace SV4 valve.
Check 4-way valve.
Check outdoor I/F P.C. board.
Defect
Replace
TE1 sensor : Outdoor heat exchanger temp sensor
TL sensor : Temp sensor between liquid tanks of outdoor PMV1/2
Check code name
[F24]
Check code name
Pd sensor error
Cause of operation
Output voltage error of Pd sensor
Check code name
[F16]
Check code name
Cause of operation
Outdoor pressure sensor miscabling 1. High-pressure Pd sensor and low-
It is output voltage error of Pd sensor. Check disconnection of connection of connector (Pd sensor: CN501) circuit
and output voltage of sensor.
pressure sensor Ps are exchanged.
(Pd, Ps)
2. Output voltage of each sensor is zero.
If the sensor is normal, replace outdoor I/F P.C. board.
NO
NO
Correct connection of connectors.
Pd sensor: CN501, Red
Are connection of Pd sensor and
Ps sensor connectors correct?
Ps sensor: CN500, White
Check code name
[F29]
Check code name
Indoor other error
Cause of operation
YES
Indoor P.C. board error
EEROM error
Are output voltage characteristics of
Pd sensor and Ps sensor normal?
Sensor error
Replace
YES
1 Pressure (Check joint) by pressure gauge
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
This error is detected during operation of air conditioner of IC10 non-volatile memory (EEPROM) on indoor unit P.C.
board. Replace service P.C. board.
If 1 and 2, 3 are different, an error of pressure sensor itself is considered.
If 2 and 3 are different, check interface P.C. board.
∗ If EEPROM was not inserted when power was turned on or it is absolutely impossible to read/write EEPROM data,
the automatic address mode is repeated. In this case, [97 error] is displayed on AI-NET central controller.
NO
Are Pd/Ps output values Pd > Ps
during compressor operation?
Check compressor.
(Approx. 3 minutes)
(Approx. 1 minute)
(Power ON) [SET DATA] is displayed
[SET DATA]
disappears.
LED (D02) 1Hz flashes
for approx. 10 seconds
on indoor unit P.C. board.
Reboot
(Reset)
YES
* Value can be confirmed by 7-segment display function on outdoor I/F P.C. board.
on main remote controller.
Pd SW01/02/03=1/1/2
Ps SW01/02/03=1/2/2
(Repetition)
Check outdoor I/F P.C. board.
Defect
Replace
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Check code name
[F31]
Check code name
Cause of operation
Check code name
[H02]
Check code name
Cause of operation
Outdoor EEPROM error
1. Outdoor unit power error (Voltage, noise, etc.)
2. Outdoor I/F P.C. board error
Compressor error (Lock)
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
4. Refrigerant stagnation in compressor shell
5. IPDU P.C. board error
Check power voltage and line.
Correct power line.
Check external noise, etc.
YES
Is there any trouble of
outdoor unit power supply?
NO
Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side
Check I/F P.C. board.
NO
Is power voltage of
outdoor unit normal?
1
1 380 – 415V ± 10%
YES
Check code name
[H01]
Check code name
Cause of operation
YES
Does voltage drop occur
Correct power line.
when other compressor starts?
Compressor breakdown
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
NO
Does OCR of MG-SW operate?
NO
YES
NO
Reset OCR manually.
3
4. Cause of abnormal overload operation
5. IPDU P.C. board error
Is wiring or connector connection
on IPDU P.C. board normal?
Correct connector connection
or wiring.
Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side
YES
Is not it an abnormal overload?
NO
YES
YES
NO
Correct cause of overload.
Is power voltage of outdoor unit normal?
380 – 415V ± 10%
YES
YES
Is there no refrigerant stagnation
in compressor shell?
Correct refrigerant stagnation
in compressor shell.
YES
Is case heater output normal?
NO
Does voltage drop occur
when other compressor starts?
Correct power line.
NO
NO
Operation starts.
Check case heater.
NO
Is connection of wiring or connection of
Correct connector connection or wiring.
connector on IPDU P.C. board normal?
NO
Is compressor normal?
YES
2
Compressor error
YES
2 Check the following items mainly.
1. Existence of abnormal sound and abnormal vibration during operation or starting
2. Abnormal overheat of case during operation or stop time (Never touch with hands.)
3. Current of compressor lead during operation or starting time
(No varied change of current) change
Is winding resistance
between phases of corresponding
compressor normal? (Note 1)
NO
Compressor error
(Motor burning, etc.)
Check IPDU P.C. board.
3 If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (T02) of Comp-IPDU is correct or not.
YES
YES
Is not it an abnormal overload?
NO
Correct cause of overload.
Check code name
[H03]
Check code name
Cause of operation
Take off lead cable of compressor.
1. Check resistance between windings:
It is normal if there are 0.7 to 0.9
2. Check insulation between outdoor
cabinet and terminal:
It is normal if there are 10M or more.
Current detective
circuit system error
1. Cabling or connector connection error on IPDU P.C. board
2. IPDU P.C. board error
.
C
S
Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side
Check IPDU P.C. board.
NO
Note 1
Wiring or connector connection
R
Correct connector connection or cabling.
Check IPDU P.C. board.
on IPDU P.C. board normal?
* After checking the output, when connecting the compressor
lead again to the compressor terminal, check surely there is
no distortion on the Fasten receptacle terminal.
If it is loosened, caulk it with pinchers, etc and then connect
lead to the terminal firmly.
YES
Details of compressor
power connecting section
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Check code name
[H04]
Check code name
Cause of operation
Check code name
[H06]
Check code name
Cause of operation
1. Service valve close
Compressor 1 case thermo operation 1. Case thermo circuit error
Low-pressure protective operation
2. I/F P.C. board error
2. Ps sensor error
[H14]
Compressor 2 case thermo operation
3. Service valve closed
3. SV2, SV4 circuit error
4. Outdoor PMV clogging
4. Miscabling of communication between
indoor and outdoor
5. SV4 valve leak, Coil misinstallation
5. Indoor/outdoor fan and condenser error
6. Indoor/outdoor PMV clogging
7. Indoor/outdoor heat exchanger clogging
8. Refrigerant shortage
6. 4-way valve error
7. Compressor error
8. Refrigerant shortage
Is case thermo circuit normal?
1. Connector connection
2. Wiring
NO
NO
NO
Are service valves of gas and
Open service valves fully.
Repair case thermo circuit.
Open service valves fully.
Repair outdoor PMV.
liquid pipe of outdoor unit fully opened?
(Note 1)
3. I/F P.C. board (Note 1)
YES
1. Case thermo is usually closed.
2. Operation temperature of case thermo is 120˚C.
Exchange low-pressure sensor.
YES
Are characteristics of low-pressure sensor normal?
YES
1 Pressure by pressure gauge (Check joint)
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor error is considered.
If 2 and 3 are different, check I/F P.C. board.
NO
Are service valves of
gas pipe and liquid pipe of
outdoor unit fully opened?
NO
Correct SV2 and SV4 circuits.
Are SV2 and SV4 circuits normal?
YES
Check miscabling, misinstallation and
connector connection.
YES
YES
Are outdoor PMV1/2/3 normal?
1. Connector connection
Is there no mispiping of discharge gas
and suction gas main pipes?
Correct piping.
NO
2. Wiring
3. Coil
Connector CN300, 301, White
NO
4. Valve body 5. I/F P.C. board
YES
Is not indoor unit with different circuit connected?
Correct cabling.
(Check with miscabling check
YES
function of outdoor unit.)
NO
Is flow selector normal?
YES
NO
Operation starts.
Check flow selector.
In cooling season, go to (A), In heating season, go to (B)
Are SV41 and SV42
Valve circuits normal?
(A) Cooling
NO
1. Misinstallation installation and
connector connection of SV41
and SV42
Correct SV4, SV5, SV11
valve circuits.
Are following items concerned
to indoor fan motor normal?
NO
SV4 valve: Connector CN311, Blue
NO
NO
Does indoor fan normally
operate in cooling season?
1. Connector connection
Repair faulty parts.
2. Condenser
3. Motor
4. Fan
2. Leakage from SV41, 42 circuit
YES
YES
YES
Is there clogging of indoor
air filter or heat exchanger?
YES
Cleaning
Check indoor P.C. board.
Does not refrigerant
bypass from discharge of
suction through 4-way valve?
Failure
Replace
YES
YES
Check 4-way valve.
NO
Is indoor PMV normal?
YES
NO
Is connector connection
or coil normal?
Repair faulty parts.
Replace PMV body.
NO
YES
Is there clogging on whole valve?
NO
YES
Refrigerant shortage or
clogging or pipe deformed
Is not refrigerant bypassed
from discharge to suction?
Check piping.
NO
(B) Heating
NO
Is compressor normal? (Note 2)
Compressor error
NO
Check outdoor
I/F P.C. board.
Is indoor fan system normal?
• Fan crack
NO
NO
Is outdoor fan normally
(Note 2) Check the following items mainly.
YES
operated in heating season?
Failure
Replace
• Fan coming-off
1. Existence of abnormal sound and abnormal vibration during operation at start time
2. Abnormal overheat of case during operation or stop (Never touch with hands.)
3. Current of compressor lead during operation or starting (No rapid current change)
YES
YES
YES
Is there clogging of
outdoor heat exchanger?
Cleaning
YES
Repair faulty parts.
Is flow selector unit normal?
NO
Check flow selector unit.
NO
Is outdoor PMV normal?
YES
Refrigerant shortage,
clogging, pipe breakage
(After checking there is no slogging or pipe breakage, charge refrigerant again.)
Refrigerant shortage,
clogging, pipe deformed
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Check code name
[H07]
Check code name
Cause of operation
In some cases, it may be difficult to check the leakage of clogging in the following condition of refrigerant stagnation
in low ambient temperature condition.
In this case, take a longer operating time prior to check.
Oil level down
detection protection
1. Valves of balance pipes closed.
2. Miscabling or misinstallation of TK1 to TK4 sensors
3. TK1 to TK4 sensor error
(Criterion: Discharge temperature of TD1 and TD2 are 60°C or higher)
4. Gas leak or oil leak of all outdoor units
5. Refrigerant stagnation of compressor case
6. SV3A, 3B, 3D, 3C, 3E valve error
(*1)
a) Leakage check for SV3A valve (For multiple outdoor unit system)
7. Clogging of oil return circuit from oil separator
8. Clogging of oil-equation circuit system
• Turn off the power supply, take off connector of SV3A valve, and then start a test operation after power-ON.
• Check the temperature change at secondary side of SV3A valve during operation . (
in the figure.)
→ If temperature is raised, it is a leakage of SV3A valve. Replace SV3A valve.
Are TK1, TK2, TK3, and
NO
b) Leakage check for SV3C valve
Correct miswiring and misinstallation.
TK1: CN514, TK2: CN515
TK4 sensors connected correctly?
(
)
• Turn off the power supply, take off connector of SV3C valve, and then start a test operation after power-ON.
Is there no sensor coming-off or misinstallation?
TK3: CN516, TK4: CN523
• After operation for several minutes, check temperature at secondary side of SV3C valve. ( in the figure.)
‚
→ If temperature is high (equivalent to discharge temperature TD), it is a leakage of SV3C valve. Replace
SV3C valve.
YES
Are TK1 and TK2 sensors connected correctly?
Is there no sensor coming-off or misinstallation?
Are sensor characteristics normal?
NO
Characteristics-2
Correct miswiring and misinstallation.
(TS1: CN504, TS2: CN522)
(Even if there is leakage from SV3C valve does not occur, temperature of SV3C valve at secondary side
rises during operation. When the checked temperature is equivalent to TD temperature, it is a leakage of
SV3C valve. Replace SV3C valve.)
Sensor error
Replace
YES
Abnormal
Abnormal
c) Clogging check for SV3B valve (For multiple outdoor unit system)
Check leakage of SV6 circuit.
Normal
Replace defective parts.
• While outdoor unit is operated, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
Set up to cooling only operation mode.
Item code (DN) OF
Cooling only operation mode: 0001
• Set up SW02 = [9], and turn on SV3A, SV3B, SV3C valves. (7-segment display [Hr] [ 3–])
Check whether there is setup missing
of cooling only indoor unit.
• While outdoor unit is operating, check temperature change at secondary side of SV3B valve. ( in the figure.)
ƒ
→ If temperature does not rise (equivalent to suction temperature), it is a clogging of SV3B valve.
Normal
Replace SV3B valve.
NO
Are characteristics of TK1 to TK4 normal?
YES
Sensor error
Replace
Characteristics-4
d) Clogging for SV3E valve
Reset the power supply.
Abnormal
NO
Check gas leak of outdoor unit.
Check oil stain in the
Specify a position where
gas leaked and repair it.
(Recharge, refill oil.)
ò
Referring to “Valve forced open/close function” of the outdoor unit, check ON/OFF operation (Sound, coil surface
temp up) of SV3E valve is performed.
(
)
machine room of outdoor unit.
Normal
ò
Start test operation in COOL or HEAT mode.
Repair the flow selector unit.
Replace defective parts
Is the flow selector unit normal?
YES
ò
After operation for several minutes, check the pipe temperature at the secondary side of SV3E valve whether
temperature changes or not. If it is equivalent to outside temperature, clogging of SV3E is considered.
( 1) Check leakage of
NO
YES
Check accumulation of
refrigerant in compressor case.
solenoid valve. (SV3C)
Check clogging.
(SV3E)
(
in the figure.)
„
(Reference)
Refrigerant accumulation
No leakage or clogging
If SV3E valve is clogged, temperature of all TK1, TK2, TK3, and TK4 do not change.
Correct accumulation of
refrigerant in compressor case,
reset power supply and
then start operation.
(*2) Clogging check for SV3D valve of oil return circuit from oil separator
a) Oil return circuit
( 2) Check clogging in oil
YES
recovery circuit of the oil separator.
(Capillary, Strainer)
Replace defective parts
Check clogging of SV3D valve.
• While outdoor unit is operating, check temperature (secondary side of capillary) on oil return circuit.
(ꢀ in the figure.)
Check oil level judgment
of each compressor.
No clogging
→ If temperature is low equivalent to suction temperature), a clogging of strainer of oil return circuit or capillary
is considered. Repair the clogged part.
SW01/02/03=1/16/1 are
displayed on 7-segment display.
b) Clogging check for SV3D valve
• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
Are all the oil levels appropriate?
YES
NO
• Set up SW02 = [6], and turn on SV3D valve. (7-segment display [Hr] [ 3d])
Clogging
Check clogging of oil-equation circuit.
( 3)
• If temperature is low at secondary side of the valve or it does not change, clogging of valve, capillary, or strainer
Replace defective parts
Eliminate cause of accumulation.
is considered. (
in the figure.)
†
Indoor/outdoor PMV error
(Cause of refrigerant accumulation)
Discharge check valve error, etc.
(Reference) If refrigerant is accumulated in the compressor case, oil level short may be judged.
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Check code name
[H08]
Check code name
Cause of operation
(*3) Check for solenoid valve of outdoor unit (For multiple outdoor unit system)
a) Clogging check for SV3A valve
Oil level detective
temperature sensor error
TK1 to TK4 sensor Open/Short
• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
• Set up SW02 = [4], and turn on SV3A valve. (7-segment display [Hr] [ 3A])
Auxiliary code : 01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error 04: TK4 sensor error
• If temperature is low at secondary side of the valve or it does not change, clogging of valve or check valve is
considered. (
in the figure.)
The detected error is an oil level detective temperature sensor error.
Check disconnection of the wiring and resistance value of the sensor.
If the sensors are normal, replace the outdoor I/F P.C. board.
Circuit
TK1
Connector
b) Leakage check for SV3C valve
CN514 (Black)
CN515 (Green)
CN516 (Red)
• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
TK2
• Set up SW02 = [6], and turn on SV3C valve. (7-segment display [Hr] [ 3C])
TK3
• If temperature does not change (up), clogging of valve or strainer is considered. ( in the figure.)
‚
TK4
CN523 (Yellow)
(*4)
a) Clogging check for oil-equalization circuit
• Drive the outdoor unit. (Drive both compressors in the unit.)
Check code name
[H16]
Check code name
Cause of operation
• After driving for 10 minutes, check temperature of TK1 and TK2 sensors and temperature of oil-equalization
circuit capillary (
in the figure) were raised.
‡
TK1 temperature detective circuit error 1. Coming-off of TK1 sensor, miscabling,
characteristics error of resistance value
(Auxiliary code : 01)
(Criterion)
2. Oil-equalization circuit error
(Check valve, capillary clogging,
strainer clogging)
TK1, TK2=Td1, Td2 temperature – Approx. 10 to 30°C
Oil-equalization capillary tubes should be higher sufficiently than outside air temperature and suction temperature.
• If temperature is low, a malfunction of capillary, strainer, or check valve is considered.
Repair the defective parts.
3. Refrigerant stagnation in case of
compressor shell
High-pressure
sensor
YES
Is not TK1 sensor detached?
NO
Correct installation of sensor.
5
Check joint
(SV2)
Oil
separator
Correct miscabling/misinstallation.
TK1: CN514
YES
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
TK2: CN515
(
TK3: CN516
TK4: CN523
)
* Characteristics-4
(SV3D)
NO
Solenoid valve
Solenoid valve
(SV41)
(SV42)
NO
Are characteristics of TK1 sensor
resistance value normal?
Sensor error
6
* Outdoor unit temp sensor characteristics-4
High-pressure
SW
High-pressure
SW
YES
Error
Sensor
(TD2)
(TD1)
Start a test operation in COOL or HEAT mode.
Replace clogged part.
2
TK1 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [11] [2].
Sensor
(TK3)
Check TK1 sensor temp approx. 10 minutes after compressor 1 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of strainer of oil-equalization circuit,
clogging of capillary tube, or malfunction of check valve is considered.
Strainer
Strainer
Compressor 1
Strainer
No error
(TK1)
(TK2)
Oil tank
Capillary tube
TK1
(TK4)
(SV3E)
7
4
Oil tank
Error
Check the clogging of SV3E valve.
7
(Note 1)
(SV3A)
(Note 1) Refer to item [H07] error.
1
No error
Solenoid
valve
Strainer
(SV3B)
Check I/F P.C. board
Replace SV3E valve.
Balance pipe
Packed valve
Check
valve
3
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Check code name
[H16]
Check code name
Cause of operation
Check code name
[H16]
Check code name
Cause of operation
Oil level detective circuit system error 1. Detachment of TK2 sensor, miscabling,
TK3 temperature detective circuit error 1. Detachment of TK3 sensor, miscabling,
characteristics error of resistance value
characteristics error of resistance value
(Auxiliary code : 02)
(Auxiliary code : 03)
2. Oil-equalization circuit error
(Check valve, capillary clogging,
strainer clogging)
2. Error of SV3C valve circuit periphery
(Check capillary clogging, strainer
clogging)
3. Refrigerant stagnation in compressor
shell
3. Refrigerant stagnation in compressor
shell
YES
YES
Is not TK2 sensor detached?
NO
Correct installation of sensor.
Is not TK3 sensor come off?
NO
Correct installation of sensor.
Correct miscabling/misinstallation.
TK1: CN514
Correct miscabling/misinstallation.
TK1: CN514
YES
NO
YES
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
TK2: CN515
TK2: CN515
(
TK3: CN516
TK4: CN523
)
(
TK3: CN516
TK4: CN523
)
NO
NO
NO
Are characteristics of TK2 sensor
resistance value normal?
Are characteristics of TK3 sensor
resistance value normal?
Sensor error
Sensor error
Replace
Outdoor unit temp sensor characteristics-4
* Outdoor unit temp sensor characteristics-4
YES
YES
After power reset,
check capillary choke of SV3C valve bypass.
YES
Does OCR of MG-SW operate?
Reset OCR manually.( 2)
Replace clogging part.
Error
Start a test operation in COOL or HEAT mode.
Replace clogged part (Capillary).
NO
TK3 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [13] [2].
After power reset
Check TK3 sensor temp approx. 10 minutes after compressor 2 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of parallel capillary is considered.
Error
Strainer
Start a test operation in COOL or HEAT mode.
TK2 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [12] [2].
No error
Check TK2 sensor temp approx. 10 minutes after compressor 2 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of strainer of oil-equalization circuit,
clogging of capillary, or malfunction of check valve is considered.
SV3E valve
Compressor 2
Strainer
TK3
No error
Error
Check the clogging of SV3E valve.
Replace SV3E valve.
(Note 1)
Capillary tube
(Note 1) Refer to item [H07] error.
No error
TK2
Error
Oil tank
Check the clogging of SV3E valve.
Check I/F P.C. board
(*1)
1
Refer to item [H07] error.
No error
Check I/F P.C. board
Replace SV3E valve.
2
If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (T02) of Comp-IPDU is correct or not.
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Check code name
[H16]
Check code name
Cause of operation
Check code name
[L04]
Check code name
Cause of operation
TK4 temperature detective circuit error 1. Detachment of TK4 sensor, miscabling,
Duplicated setup of outdoor line address Outdoor line addresses are duplicated.
characteristics error of resistance value
(Auxiliary code : 04)
2. Check clogging and malfunction of
SV3E valve circuit.
YES
3. Oil-equalization circuit error
(Check capillary clogging, strainer
clogging)
Is there duplicated line address setup?
NO
Correct the line address setup.
Correct the cable connection.
4. Refrigerant stagnation in compressor
shell
NO
Are communication cable connections of
[U1.U2], [U3.U4], and [U5, U6] normal?
YES
Is not TK4 sensor detached?
NO
Correct installation of sensor.
YES
Check outdoor I/F P.C. board.
Re-set up the address.
(Refer to “Address setup”.)
Correct miscabling/misinstallation.
TK1: CN514
Failure
Replace
YES
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
TK2: CN515
(
TK3: CN516
TK4: CN523
)
NO
NO
Are characteristics of TK4 sensor
resistance value normal?
Sensor error
Replace
Check code name
[L05]
Check code name
Cause of operation
YES
Duplicated indoor units with priority
(Displayed on indoor unit with priority)
1. Two or more prior indoor units exist.
YES
Does OCR of MG-SW operate?
NO
Reset OCR manually.( 2)
This check code is displayed on the set indoor unit when setup of indoor unit with priority is duplicated.
No error
• Priority setup with two or more units is not available. Choose one prior unit in one refrigerant circuit system.
Check the clogging of SV3E valve.
( 1)
Check I/F P.C. board
1
2
Refer to item [H07] error.
Error
If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (T02) of Comp-IPDU is correct or not.
Replace SV3E valve.
Check code name
[L06]
Check code name
Cause of operation
Check the clogging of SV3E valve.
Duplicated indoor units with priority
(Displayed on the indoor unit other than
one with priority and on the outdoor unit)
Two or more indoor units with priority
are duplicated.
Auxiliary code : No. of indoor units with priority
Check code name
[L03]
Check code name
Duplicated indoor header units
Cause of operation
There were two or more indoor header
units in some remote controller group
control.
When indoor unit with priority is duplicated, this check code is displayed on the unit other than the setup indoor unit
and outdoor unit.
• As only one indoor unit with priority is valid, change the setup.
1) Check the connection changing of the remote controller after the connection has been changed.
2) If the group configuration and address are normal when power has been turned on, the mode automatically shifts
to address setup mode. (Re-setup of address) → Refer to “Address setup”.
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Check code name
[L07]
Check code name
Cause of operation
Check code name
[L10]
Check code name
Cause of operation
Group line in individual indoor unit
The group line is connected in the
individual indoor unit.
Outdoor capacity unset
On the outdoor IF P.C. board for service, the
model selecting jumper has not been set up so
as to match with the model.
Item code (D1) 12: Line address
Item code (D2) 13: Indoor address
Item code (D3) 14: Group address
YES
Check setup item code
DN 12, 13, and 14 addresses.
Is there group cabling?
NO
I/F P.C. board A’ssy service for the outdoor unit is common to this series. A setup for model selection different from
that for P.C. board with trouble is necessary. Set up a model based upon the P.C. board A’ssy exchange procedure.
YES
There is individual indoor unit.
NO
Correct indoor group address.
Check code name
[L17]
Check code name
Cause of operation
Check indoor P.C. board.
Failure
Replace
Inconsistent models of
outdoor units
There are outdoor units on the communication
line other than Super Module Multi Flex type
such as Super Module Multi or Super Module
Multi ice regenerative type
Check code name
[L08]
Check code name
Cause of operation
Indoor group / address unset
Indoor address unset
Are the connected outdoor
units those for flex on 1 system?
(Check model name.)
NO
NO
Replace outdoor units of other models
with outdoor units purposed for flex.
NO
Are powers of all the
indoor units turned on?
YES
Turn on the power of indoor units.
YES
Is the check code [L17]
displayed even if turning on again
power of all the connected outdoor
units on 1 system alone?
Correct communication line between
outdoor units.
Disconnect connectors between
[U1, U2] and [U3, U4].
YES
Turn on the power of outdoor unit again.
Clear addresses.
(Refer to “Address clear”.)
Are all the connected
NO
Change the incorrectly built-in outdoor
I/F P.C. boards with I/F boards for
Super Module Multi Flex.
outdoor I/F P.C. boards on 1 system
P.C. boards of outdoor units for
Super Module Multi Flex?
Re-execute address setup.
(Refer to “Address setup”.)
YES
Check again whether there is any
other outdoor unit or not on the
communication line in 1 system.
If any, turn off power of the
corresponding outdoor unit and
then check once more.
∗ Using 7-segment on I/F P.C. board, check the model name for each outdoor unit.
For check, when putting the rotary switch on SW01/02/03=16/16/16, it is an
outdoor I/F P.C. board for Super Module Multi Flex if “F” is displayed at the left
side of 7-segment [A] part.
Note) This code is displayed when the power is turned on at the first time after installation.
(Because the address is not yet set up)
Check code name
[L09]
Check code name
Cause of operation
Indoor capacity unset
Indoor capacity unset
YES
Are capacity setups
of indoor units unset?
Set up capacity data of indoor unit.
(Setup item code (DN) = 11)
NO
Check indoor P.C. board.
Defect
Replace
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Check code name
[L18]
Check code name
Cause of operation
Check code name
[L29]
Check code name
Cause of operation
Flow selector unit system error
An indoor unit which has been operated in
cooling only mode is operated in heating mode
without setup for cooling only mode.
IPDU quantity error
1. Incorrect model setup in service for I/F P.C.
board
2. Communication error between IPDU, fan
IPDU and I/F
3. IPDU, fan IPDU, I/F P.C. board error
NO
Set up All cooling mode.
Item code (DN)=OF
Cooling only operation mode=0001
Did set up All cooling
to All cooling indoor unit?
Auxiliary code :
YES
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 error
05: IPDU1, fan IPDU error
04: Fan IPDU error
06: IPDU2, fan IPDU error
Check flow selector unit.
07: All IPDU error or disconnection of communication line between IPDU-I/F P.C. board or outdoor I/F P.C. board error
NO
Is jumper setup of outdoor I/F P.C. board correct?
Correct connection of connector.
(Jumpers 7, 8, 9 ON)
YES
Check code name
[L20]
Check code name
Cause of operation
YES
Is communication connector between IPDU and
Correct connection of connector.
Duplicated central
control addresses
Central control addresses are duplicated.
I/F P.C. board connected?
NO
Are not two or more
central control system identical
network addresses connected?
YES
Correct the network address
of the central control system.
YES
Is there no disconnection of communication
Replace communication line.
line between IPDU and I/F P.C. board?
NO
NO
Check the network adaptor
on the indoor P.C. board.
Is there voltage fluctuation between
4 and 5 pins of CN600 on I/F P.C. board.
(Measurement by tester: DC0 to 5V, 5 pin GND)
NO
NO
I/F P.C. board error
YES
Is there voltage fluctuation between
3 and 5 pins of CN600 on I/F P.C. board.
(Measurement by tester: DC0 to 5V, 5 pin GND)
IPDU P.C. board error
Check code name
[L28]
Check code name
Cause of operation
Quantity over of
connected outdoor units
1. Quantity over of connected outdoor units
YES
Both IPDU (No.1, No.2) and fan IPDU
did not return the communication.
2. Connection error of communication line
between outdoor units
3. Outdoor I/F P.C. board error
On the fan power supply P.C. board,
NO
1) CN503: Between 1 and 5 pins
12V
7V
Replace fan power supply P.C. board.
2) CN503: Between 2 and 5 pins
3) Between +5V and GND at the side of CN505: 5V
NO
NO
Is No. of connected
Max. 3 units are allowed for flex system.
outdoor units below 3 units?
YES
YES
P.C. board to be replaced
IPDU1
Auxiliary code
Replace IPDU P.C. board with trouble.
Is communication line between
outdoor units correctly connected?
Correct connection of communication line.
01
02
03
04
05
06
07
IPDU2
YES
IPDU1, 2
Fan IPDU
Check outdoor I/F P.C. board.
IPDU1, fan IPDU
IPDU2, fan IPDU
IPDU1, 2, fan IPDU, I/F
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Check code name
[L30]
Check code name
Cause of operation
Outside error was input.
Check code name
[P03]
Check code name
Cause of operation
Interlock in indoor unit
from outside
Discharge tempTD1 error
1. Service valve of outdoor unit closed.
2. Outdoor PMV1, 2 error
3. TD sensor error
4. Refrigerant short, clogging in pipe
5. 4-way valve error
NO
NO
Is outside device connected
Check indoor P.C. board.
Failure Replace
to connector CN80?
6. SV4 circuit leakage, misinstallation
7. SV5 circuit leakage
YES
8. SV6 circuit clogging
9. Discharge gas/Suction gas pipes mispiping
10. Flow selector unit error
Check outside device.
Does outside device correctly operate?
YES
Failure
Replace
Are service valves of
NO
Check cause of the operation.
outdoor discharge gas, suction gas,
and liquid pipe fully opened?
Open service valves fully.
Repair outdoor PMV.
YES
Are outdoor PMV1 and PMV2 normal?
1. Connector connection
2. Wiring
NO
* Connector CN300, 301 White
3. Coil
Check code name
[L31]
Check code name
Cause of operation
4. Valve itself
5. Outdoor P.C. board
Extended IC error
1. Outdoor unit power error
2. Outdoor I/F P.C. board error
YES
NO
Is resistance characteristic
of TD1 sensor normal?
Replace TD1.
YES
Refer to Outdoor unit temperature
sensor characteristics-4.
Is there any trouble of
outdoor unit power supply?
Check power voltage and line.
Check auxiliaty noise, etc.
YES
NO
NO
NO
Is there no refrigerant leakage of
Check 4-way valve.
discharge gas to suction side in 4-way valve?
YES
Check outdoor I/F P.C. board.
SV4 circuit
1. Are not coils of SV41 and
SV42 valves mounted reversely?
2. Is no leakage from SV41?
Correct mounting of valve coils
or replace SV41 valve.
YES
Check code name
[P01]
Check code name
Cause of operation
Abnormal
Abnormal
Replace defective parts.
Replace defective parts.
Check leakage of SV5 circuit.
Normal
Indoor fan motor error
1. Cabling error
2. Check fan motor.
Check clogging of SV6 circuit.
Normal
* For the models installed with AC fan motor only
YES
YES
Is there no connection error or
Correct cabling circuit for
the connector connection.
Abnormal
NO
Check mispiping of discharge gas /
suction gas main pipes.
disconnection of CN076 connector?
Correct piping.
Repair flow selector unit.
Correct wiring.
NO
Normal
Is the flow selector unit normal?
YES
Is not there mechanical lock of fan motor?
NO
Replace fan motor.
NO
Is not indoor unit in other
refrigerant line connected?
Check indoor P.C. board.
Failure
Replace
YES
(Check there is no pipe breakage, and then recharge refrigerant.)
Refrigerant short, clogging, pipe breakage
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Check code name
[P04]
Check code name
Cause of operation
1. High-pressure SW error
A
C All heating operation
All heating operation
Actuation of
high-pressure SW
Repair SV4 circuit.
Coil error, clogging,
NO
2. Service valve closed
Is SV4 circuit normal?
YES
3. Pd sensor error
(
)
disconnection of wiring, etc.
4. Indoor/outdoor fan error
5. Indoor/outdoor PMV choke
6. Indoor/outdoor heat exchanger clogging, air short circuit
7. SV2 circuit error
Refrigerant overcharge,
clogging,pipe breakage,
abnormal overload condition
YES
NO
8. SV4 circuit error
Does heating indoor fan
normally operate?
9. SV5 circuit error
10. Discharge line check valve malfunction
11. Refrigerant overcharge
NO
Is connector
connection,
coil normal?
NO
Is indoor
PMV normal?
YES
Auxiliary code : Compressor 1 side 02: Compressor 2 side
Note) High-pressure SW is normally closed.
YES
(B contact)
Repair
faulty parts.
Is there a cause to
interfere operation of
indoor heat exchanger?
1 Air filter clogging
NO
NO
YES
Does high-pressure SW operate?
Is circuit cabling normal?
YES
Check and correct cabling.
Check I/F P.C. board.
YES
2 Heat exchanger clogging
3 Air short circuit
NO
Are connector connection,
heat exchanger, fan, and
fan motor normal?
Failure
Replace
NO
NO
Check parts.
YES
Eliminate the
interfered causes.
Are parts of high-pressure SW normal?
Failure
Replace
Repair
faulty parts.
YES
NO
Is service valve fully opened?
Open service valve fully.
Correct piping.
NO
Is 4-way valve normal?
YES
YES
Are characteristics of TC2
and TCJ sensor resistance
value normal?
NO
Abnormal
Check mispiping of
discharge/suction gas main pipes.
Replace 4-way valve.
NO
Normal
Abnormal
Check operation of PMV3 SV12 valve.
YES
Replace defective parts.
Replace TC2
or TCJ sensor.
Is SV11 circuit normal?
YES
Normal
Abnormal
Is the flow selector normal?
Repair the flow selector unit.
Repair faulty position.
NO
Is there clogging
of valve?
Check indoor P.C. board.
Normal
Failure
Replace
All cooling operation To
All heating operation To
B
C
Reset power supply, and start a test
operation corresponded to the season.
YES
NO
Replace PMV body.
Are not indoor units of different
refrigerant circuit connected?
Are characteristics of
high-pressure sensor normal?
Replace the high-pressure sensor.
Check with miscabling check
function of outdoor unit.
YES
(
)
Check and
correct the cabling.
Refrigerant overcharge, clogging,
pipe breakage, abnormal overload condition
B
All cooling operation
NO
NO
Is there no crack or
coming-off of fan?
Does cooling outdoor fan normally operate?
YES
Repair faulty parts.
Connector connection,
fan IPDU, fan motor, wiring
YES
Check code name
[P05]
Check code name
Cause of operation
Is there a cause to interfere operation
of heat exchanger of outdoor unit?
1. Heat exchanger clogging
2. Air short circuit
YES
NO
Eliminate the interfered causes.
Open phase, negative phase
1. Power supply open phase
2. Power supply negative phase
NO
Is SV2 circuit normal?
Repair SV2 circuit.
Coil error, clogging,
• Check the phase power line of outdoor unit.
• Check error of outdoor I/F P.C. board.
• Check there is no looseness, etc of terminal.
YES
A
(
)
disconnection of wiring, etc.
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Check code name
[P07]
Check code name
Cause of operation
1. Power voltage error
Check code name
[P12]
Check code name
Cause of operation
Heat sink overheat error
Indoor fan motor error
1. Cabling error of fan motor connector
2. Fan motor error
2. Outdoor fan system error
3. Heat sink installation error
3. Indoor P.C. board error
4. Clogging of hear sink cooling duct
5. IPDU P.C. board error (TH sensor error)
Turn off power supply.
Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side
Detectable in model with DC fan motor
4-way Air Discharge Cassette or Concealed Duct Standard type
Under Ceiling, High Wall or Compact 4-way Air Discharge Cassette type
(
)
NO
Is power voltage normal?*
Correct power line.
* 380–415V ± 10%
YES
Is there connection error or
disconnection on connector CN333, CN334
of indoor P.C. board (MCC-1402)?
YES
Correct connector connection.
NO
Correct wiring such as cable to compressor
or connector connection.
Is wiring of IPDU normal?
YES
NO
NO
Is indoor fan normal?
Check fan and fan motor.
Tighten screws.
Remove connectors CN333 and CN334
on indoor P.C. board (MCC-1402).
YES
YES
Is screw between IPDU and heat sink loosened?
NO
NO
Does fan turn without trouble
when turning it with hands?
Replace indoor fan motor.
YES
s there no clogging of heat sink cooling duct?
Correct clogging.
YES
NO
Check IPDU P.C. board.
Is resistance value between each phase
NO
at motor side of fan motor connector CN333 on
Replace indoor fan motor.
indoor P.C. board (MCC-1402) correct?
1
YES
1
• Is not winding 1 (Red lead) to 3 (White lead), 3 (White lead) to 5 (Black lead),
5 (Black lead) to 1 (Red lead) opened/shorted?
Resistance value should satisfy the follows.
Check code name
[P10]
Check code name
Cause of operation
• Is not grounded between cabinet and 1, 3, 5? Should be 10 or more
Indoor overflow error
1. Float SW operation error
2. Drain pump operation error
3. Clogging of drain pipe
4. Indoor P.C. board error
Is resistance value at motor side of
NO
fan motor connector CN334 on indoor P.C. board
Replace indoor fan motor.
(MCC-1402) correct?
2
YES
2
Check resistance value of fan motor position detective circuit.
• Is not winding 1 (Yellow lead) to 4 (Pink lead) opened/shorted?
Resistance should be 5 to 20k
Replace indoor fan motor.
Auxiliary code : Indoor address with trouble
NO
Is output of indoor fan motor position
detective signal correct?
3
Is float SW connector
(Indoor control P.C. board CN34)
connected normally?
NO
NO
Correct
connector connection.
YES
3
Check fan motor position detective signal.
YES
• Measure voltage with tester between CN334 1 and 5 on indoor P.C. board (MCC-1402)
under condition of CN333 and CN334 installed and power-ON.
Turn fan slowly with hands so that pin voltage fluctuates between 0 and 5V.
• Between 4 and 5: 5V
NO
Check and correct wiring.
Does float SW operate?
YES
Is wiring normal?
YES
Check indoor P.C. board.
Failure Replace
CN333
Check indoor P.C. board (MCC-1402).
Failure Replace
NO
NO
Is power supply to
Check indoor P.C. board.
Does drain pump operate?
YES
drain pump normal?
Failure
Replace
YES
Replace drain pump,
and check cabling.
•
Check there is 380–415V voltage of
1-3 pin of CN68 on indoor P.C. board.
Check drain pipe, etc.
CN334
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Check code name
[P13]
Check code name
Cause of operation
Check code name
[P15]
Check code name
Cause of operation
Outdoor liquid back detection error 1. PMV1/PMV2 error
2. Pd sensor, Ps sensor error
Gas leak detection
1. Outdoor unit service valve closed
2. Outdoor PMV error
TS condition (Auxiliary code : 01)
3. Clogging of SV2 circuit
3. TS1 sensor error
4. Clogging of SV3B circuit, balance pipe
5. Leakage of main discharge pipe
6. Outdoor I/F P.C. board error
4. Refrigerant shortage, clogging refrigerant
circuit
5. 4-way valve error
6. SV4 circuit error
NO
NO
Are connections of outdoor
Correct connector connection.
(CN300, CN301)
NO
Are service valves at gas and
liquid side fully opened?
PMV1/PMV2 connectors correct?
Open service valves fully.
Repair outdoor PMV.
Replace TS2 sensor.
YES
YES
Are operations of outdoor
PMV1/PMV2 normal?
PMV error
Is outdoor PMV1, 2 normal?
1. Connector connection
2. Wiring
NO
Connectors CN300, 301 White
YES
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
NO
NO
Are characteristics of Pd sensor/Ps sensor
output voltage normal?
Pd sensor/Ps sensor error
YES
YES
NO
Refer to outdoor unit temperature
Are characteristics of
TS2 sensor resistance normal?
Correct connector connection.
(CV2: CN302)
Is SV2 valve coil correctly connected?
YES
sensor characteristics-3.
YES
Does not discharge
refrigerant gas bypass to suction side
through 4-way valve?
YES
YES
Is there no miswiring or
misinstallation on TS1 and TS2 sensors?
Check and replace 4-way valve and coil.
Correct miswiring/installation
NO
NO
Check I/F P.C. board.
NO
Is there no leakage of
Repair SV41 and SV42 circuits.
Coil, valve body,
SV41 and 42 valve circuits?
YES
(
)
disconnection of cable, etc
Abnormal
Abnormal
Check mispiping of discharge gas/
suction gas main pipes.
Correct piping.
Normal
Is the flow selector unit normal?
Normal
Repair the flow selector unit.
Refrigerant shortage,
clogging, pipe breakage.
(Check there is no clogging and pipe breakage, and then recharge refrigerant.)
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Check code name
[P15]
Check code name
Cause of operation
Check code name
[P17]
Check code name
Cause of operation
Gas leak detection
1. Outdoor unit service valve closed
2. Outdoor PMV error
3. TD sensor error
Discharge tempTD2 error
1. Outdoor unit service valve closed
2. Outdoor PMV error
TD condition (Auxiliary code : 02)
3. TD sensor error
4. SV4 circuit error
4. Refrigerant shortage, clogging of refrigerant circuit
5. 4-way valve error
5. Refrigerant shortage, clogging refrigerant
circuit
6. SV4 circuit leakage, misinstallation
7. SV5 circuit leakage
8. SV6 circuit clogging
NO
Are service valves of gas
and liquid sides fully opened?
Open service valves fully.
9. Mispiping of discharge gas/suction gas pipes
10. Flow selector unit error
YES
NO
Are service valves of gas and
Open service valves fully.
Repair outdoor PMV.
Is outdoor PMV1, 2 normal?
1. Connector connection
2. Cabling
liquid sides fully opened?
NO
Connectors CN300, 301 White
Repair outdoor PMV.
YES
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
Is outdoor PMV normal?
1. Connector connection
2. Cabling
NO
* Connectors CN300, 301 White
YES
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
NO
Refer to outdoor unit temperature
Are characteristics of
TD1, TD2 sensor resistance normal?
Replace TD1 or TD2 sensor.
YES
sensor characteristics-4.
YES
NO
Are characteristics of
TD2 sensor resistance normal?
Replace TD2 sensor.
Check 4-way valve.
* Refer to outdoor unit
temperature sensor
characteristics-4.
NO
Is SV4 valve circuit normal?
(Coil misinstallation, valve leakage)
YES
Repair SV41 and SV42 circuits.
NO
Does not discharge refrigerant gas by
pass to suction sidethrough 4-way valve?
Coil, valve body, coil installation,
disconnection of cable, etc.
YES
(
)
YES
NO
Check with miscabling check
Are not indoor units in different
refrigerant circuit connected?
SV4 circuit
Correct cabling.
1. Are not SV41 and SV42 valve
coils installed reversely?
2. Is there no leakage through
SV42 circuit?
NO
Correct installation of valve coil.
Replace SV42 valve.
(
)
function of outdoor unit.
YES
Abnormal
YES
Check leakage of SV5 circuit.
YES
Check leakage of
Replace defective parts.
SV5 and SV11 circuits.
NO
NO
Replace defective parts.
Replace defective parts.
Normal
Abnormal
Abnormal
Check mispiping of discharge gas/
suction gas main pipes.
Check clogging of SV6 circuit.
YES
Correct piping.
Normal
NO
NO
Check mispiping of discharge gas/
suction gas main pipes.
Correct piping.
Repair the flow selector unit.
Correct cabling.
Is the flow selector unit normal?
Normal
Repair the flow selector unit.
YES
Is the flow selector unit normal?
YES
Refrigerant shortage,
clogging, pipe breakage.
(Check there is no clogging and pipe breakage, and then recharge refrigerant.)
NO
Is not an indoor unit of different
refrigerant line connected?
Check with miscabling check
function of outdoor unit.
(
)
YES
Refrigerant shortage, clogging, pipe breakage.
(Check there is no pipe breakage, and then recharge refrigerant.)
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Check code name
[P19]
Check code name
Cause of operation
1. 4-way valve error
Check code name
[P20]
Check code name
Cause of operation
4-way valve operation error
High-pressure protective operation 1. Pd sensor error
2. Service valve closed.
2. TS1 sensor/TE1 sensor error
3. Pd sensor/Ps sensor error
3. Indoor/outdoor fan error
4. TE sensor/TL sensor misconnection
4. Indoor/outdoor PMV clogging
5. Indoor/outdoor heat exchanger clogging
6. SV2 circuit error
Auxiliary code : Detected outdoor unit No.
7. SV4 circuit error
8. SV5 circuit error
9. Outdoor I/F P.C. board error
NO
Is 4-way valve coil
connector connected?
Correct connector connection.
(4-way valve coil: CN317)
10. Operation error of check valve of main
discharge pipe
YES
11. Refrigerant overcharge
Correct connector connection.
TS1 sensor: CN504
TE1 sensor: CN505
Pd sensor: CN501
NO
NO
Are TS1, TE1, Pd, Ps sensor
Are service valves fully opened?
YES
Open service valves fully.
Check parts.
connectors connected?
Ps sensor: CN500
YES
NO
Are characteristics of
high-pressure sensor normal?
Failure
Replace
NO
Are characteristics of resistance value
YES
Replace sensor.
Replace sensor.
of TS1 and TE1 sensors normal?
Abnormal
Check mispiping of discharge gas/
suction gas main pipes.
Correct piping.
YES
Normal
Check operation of PMV3 SV12.
Normal
Abnormal
Abnormal
NO
Replace defective parts.
Are output voltage characteristics
of Pd and Ps sensors normal?
Is the flow selector unit normal?
Normal
Repair the flow selector unit.
YES
NO
All cooling operation To
All heating operation To
B
C
Reset power supply, and start a test
operation corresponded to the season.
Are connection and installation
of TE1 and TL sensors correct?
Correct connection
and installation.
1. Pressure by pressure gauge (Check joint)
2. Pressure display on 7-segment display
3. Output voltage of I/F P.C. board
YES
B
All cooling operation
If 1 and 2, 3 are different, an error of pressure sensor is considered.
If 2 and 3 are different, check I/F P.C. board.
Reset the power supply and
start heating test operation.
NO
Does cooling outdoor fan normally operate?
Correct faulty parts.
YES
Is there no fan crack or coming-off?
NO
YES
Correct faulty parts.
NO
Is the flow selector unit normal?
Replace the FS unit.
(Connector connection, fan IPDU, fan motor, wiring)
NO
Is outdoor PMV1, 2 normal?
YES
Correct faulty position.
YES
(Connector connection wiring, coil mounting, valve clogging, etc)
Does not discharge
refrigerant gas bypass to
suction side through
If an error did not occur
in test operation,
restart the operation.
YES
NO
Is there a cause to interfere operation
of heat exchanger of outdoor unit?
1. Heat exchanger clogging
2. Air short circuit
Does 4-way valve operate?
YES
Eliminate the interfered causes.
4-way valve?
1
NO
YES
NO
Is SV2 circuit normal?
YES
NO
NO
Repair SV2 circuit.
4-way valve error
Check 4-way valve.
(Coil error, clogging, disconnection of cable, etc.)
Is SV4 circuit normal?
YES
Repair SV4 circuit.
1 Check TS and TE temperature of the outdoor unit which compressors is operated.
(Coil error, clogging, disconnection of cable, etc.)
(I/F) SW01=[1], SW02=[6], SW03=[2]
SW01=[1], SW02=[7], SW03=[2]
TS sensor temperature
TE sensor temperature
NO
Does check valve of main
Repair check valve. Replace
discharge pipe normally operate?
<Judgment criteria>
TE sensor: Normal if TE ≤ 20˚C except summer season (Outside temp 20˚C or lower)
TS sensor: Normal if TS ≤ 40˚C except summer season (Outside temp 20˚C or lower)
YES
Refrigerant overcharge, clogging,
pipe breakage, abnormal overload condition
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Check code name
[P22]
Check code name
Cause of operation
C
Outdoor fan IPDU error
1. Fan lock
2. Fan IPDU P.C. board error
3. Overload cause
All heating operation
4. External cause such as blast
5. Fan IPDU power P.C. board error
Is connector
NO
NO
NO
connection of indoor
heat exchanger fan or
fan motor normal?
Does heating indoor fan
normally operate?
Auxiliary code: 0 ∗ : IGBT short circuit
1 ∗ : Position detect circuit error
4 ∗ : Motor current error detected
D∗ : TH sensor error
3 ∗ : Motor lock error
YES
YES
C∗ : TH sensor error (Heat sink overheat)
E∗ : Vdc error
Is indoor PMV normal?
YES
Repair faulty parts.
NO
Are wire connector
connection on fan IPDU and
power P.C. board A’ssy normal?
NO
Are characteristics
of sensor TC2 and TCJ
resistance normal?
NO
Correct cable connector connection.
Is connector connection
coil normal?
YES
YES
YES
YES
NO
Repair faulty parts.
NO
Replace TC2 or TCJ sensor.
Is not outdoor fan motor locked?
NO
Check indoor P.C. board.
Faulty Replace
Is there a clogging?
YES
Is winding resistance of the motor correct?
13 to 33 (Between R and S, R and T, S and T)
Replace motor.
Replace PMV body
.
YES
Repair check valve. Replace
Repair check valve. Replace
NO
Is check valve of main
discharge pipe normal?
YES
Is there no loosening on fixation
between fan IPDU and heat sink?
Retightening of screws, etc.
YES
YES
Is there a cause to
interfere operation of
YES
YES
YES
heat exchanger of indoor unit?
1. Air filter clogging
Eliminate the interfered causes.
Is sub-code of outdoor I/F P.C. board [0d]?
NO
Replace fan IPDU.
2. Heat exchanger clogging
3. Air short circuit
NO
Is there no problem
such as stuffing or blast blowing to
discharge port of outdoor fan?
NO
Correct cause of overload.
Is SV5 circuit normal?
Repair SV5 circuit.
Coil error, choke,
(
)
disconnection of cable, etc.
NO
YES
Abnormal
Abnormal
Check operation of 4-way valve.
Normal
Replace 4-way valve.
Check fan IPDU.
Check clogging of SV11 circuit.
Normal
Replace defective parts.
NO
Are not indoor units of different
refrigerant circuit connected?
Check and correct cabling.
Check with miscabling check function
of outdoor unit.
(
)
YES
Refrigerant overcharge,
clogging, pipe breakage,
abnormal overload condition
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Check code name
[P26]
Check code name
Cause of operation
Check code name
[P29]
Check code name
Cause of operation
G-Tr short-circuit protection error 1. Outdoor unit power error
2. IPDU error/Cable connection error
Compressor position
detective circuit error
1) Cable/connector connection error
2) Compressor error
3. Compressor error
3) IPDU P.C. board error
4. IPDU P.C. board error
Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side
Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side
NO
Are connector connection
and wiring normal?
Check and correct circuit and cables
such as cabling to compressor, etc.
NO
Is power voltage of outdoor unit normal?
Correct power line.
YES
YES
YES
NO
Is not grounded?
Compressor error
Compressor error
Compressor error
Replace
Replace
Replace
Is wire connector connection
on IPDU P.C. board normal?
Correct connection
of wire connector.
NO
YES
YES
Is not winding shorted?
(Is winding resistance 0.1 to 0.3 ?)
NO
Is compressor normal?
Replace compressor.
NO
YES
YES
NO
Is not winding opened?
Is smoothing condenser normal?
Check capacity coming-out/
external appearance.
(1500µF, 350V)
NO
YES
Check IPDU P.C. board.
Failure
Replace
Replace IPDU P.C. board.
Check code name
[P31]
Check code name
Cause of operation
Other indoor error
(Group follower unit error)
Other indoor unit in the group is abnormal.
When the header unit of the group detected [E03, L03, L07, L08 error], the follower unit of the group displays [P31]
error and stops. There are no check code display and alarm record of the main remote controller.
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7-6. 7-Segment Display Function
n 7-segment display on the outdoor unit (Interface P.C. board)
On the interface control P.C. board, 7-segment LED to check the operating status is provided on the control P.C.
board.
The displayed contents are changed by combining the setup numbers of the rotary switches (SW01, SW02, and
SW03) on P.C. board.
Interface P.C. board
SW06
SW07
SW08
SW09
7-segment
display A
7-segment
display B
CN30 CN31
SW05
SW15
SW06
SW07
SW08
SW09
CN32 SW04
D600 D601 D602 D603 D604
CN30 CN31
SW05
SW15
CN32 SW04
D600 D601 D602 D603 D604
Display
A
Display A
Display
B
SW01 SW02 SW03
2nd.
place
1st.
place
3rd.
place
2nd.
place
1st.
place
Display B
SW01 SW02 SW03
u Check procedure in case of stop with trouble
When the system stopped due to a trouble of the outdoor unit, execute a check in the following
procedure.
1. Open the panel of the outdoor unit, and then check the 7-segment display.
The check code is displayed at the right side of 7-segment display B.
[U1] [¡¡¡] ([¡¡¡]: Check code)
∗ Switch setup when confirming the check code: SW01 [1], SW02 [1], SW03 [1]
However the check code [¡¡¡] is displayed for 3 seconds and the auxiliary code [¡¡¡] for 1
second are alternately displayed if an auxiliary code is provided.
2. Confirm the check code, and then conduct the check operation based on the procedure of each
check code diagnosis.
3. [U1] [E28] on 7-segment display means a trouble on the follower unit.
Push the push-switch SW04 on the header unit for several seconds. (2 seconds or more)
As only the fan of the outdoor unit with a trouble drives, open the panel of the corresponding unit, and
then confirm the check code displayed with 7-segment.
4. Perform the check operation based on the procedure of each check code diagnosis.
How to read the check monitor
<7-segment display>
0
a
1
c
2
e
3
4
h
5
i
6
n
7
o
8
r
9
A
t
b
C
y
d
–
E
u
F
H
J
L
P
G
S
V
89
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1. Data display of system information (Displayed on the header outdoor unit only)
SW01 SW02 SW03
Display contents
Displays refrigerant name.
Model with refrigerant R410A
Model with refrigerant R407C
1
1
3
Refrigerant name
A
B
r4
r4
10A
07C
2
3
4
5
6
7
8
9
System capacity
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
[ 5] to [48]
[HP]
: 5 to 48HP
No. of outdoor units
[ 1] to [ 4]
[ P]
: 1 to 4 units
No. of connected indoor units/
No. of units with cooling thermo ON
[ 0] to [48]
: 0 to 48 units (No. of connected units)
[C0] to [C48] : 0 to 48 units (No. of units with cooling thermo ON)
[ 0] to [48] : 0 to 48 units (No. of connected units)
No. of connected indoor units/
No. of units with heating thermo ON
[H0] to [H48] : 0 to 48 units (No. of units with heating thermo ON)
Data is displayed with hexadecimal notation
Compressor command
correction amount
Release control
Normal time : [ r], During release control: [r1]
—
Oil-equalization control
Oil-equalization request
Normal time : [oiL-0]
During oil equation : [oiL-1]
Displays with segment LED lighting pattern
Display A
A
Display B
F in the left figure goes on:
F
E
B
C
G
Header requests oil equalization.
C in the left figure goes on:
Follower requests oil-equalization.
(Outdoor unit number)
D Dp
U2
U3
U4
10
Refrigerant/oil recovery operation
A
B
During sending of cooling refrigerant oil recovery signal : [C1].
Normal time : [C ]
During sending of heating refrigerant oil recovery signal : [H1].
Normal time : [H ]
11
12
Automatic address
Demand operation
A
B
A
B
[Ad]
Automatic addressing : [FF], Normal time : [ ]
[dU]
Normal time : [ ]. In 50% to 90% : [ 50 to 90]
When controlling by communication line input : [E50 to E90]
13
Optional control (P.C. board input) Displays optioned control status
Operation mode selection : In heating with priority (Normal)
A
B
h.∗
c.∗
∗.∗.∗.
∗.∗.∗.
Priority on cooling
Heating only
H.∗ ∗.∗.∗.
Cooling only
C.∗ ∗.∗.∗.
Priority on No. of operating indoor units
Priority on specific indoor unit
Batch start/stop : Normal
Start input
n.∗
∗.∗.∗.
∗.∗.∗.
∗.∗.∗.
U.∗
…
∗.
.
∗.1. ∗.∗.∗.
Stop input
∗.0. ∗.∗.∗.
…
Night low-noise operation : Normal
Operation input
∗.∗.
.∗.∗.
∗.∗. 1.∗.∗.
…
Snow fan operation : Normal
Operation input
∗.∗. ∗. .∗.
∗.∗. ∗.1.∗.
14
15
16
Option control (BUS line input)
Same as above
Unused
—
A
B
—
—
∗ mark: Indicates none on display
90
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2. Data display of outdoor unit information (Displayed on each outdoor unit)
SW01 SW02 SW03
Display contents
1
1
1
Error data
A
B
Displays outdoor unit number: [U1] to [U4]
Displays check code (Latest code only is displayed.)
There is no check code: [– – –]
There is auxiliary code: Check code [∗ ∗ ∗] for 3 seconds,
auxiliary code [– ∗ ∗] for 1 second alternately
<SW04> push function
: Fan of unit with error only drives. 7-segment A: [E1]
<SW04 + SW05> push function : Fan of normal unit only drives. 7-segment A: [E0]
<SW05> push function
: Interruption of fan operation function
2
3
—
A
B
—
—
Operation mode
Outdoor unit HP
A
Stop: [ ]
Normal cooling: [ C], Normal heating: [ H], Normal defrost: [ J]
B
A
B
A
—
5HP: [ 5], 6HP: [ 6], 8HP: [ 8], 10HP: [10], 12HP: [12]
[HP]
4
5
Compressor operation command
No.1 compressor operation command is displayed.
Data display with Hexadecimal notation: [00 to FF]
B
No.2 compressor operation command is displayed.
Data display with Hexadecimal notation: [00 to FF]
<SW04> push function
7-segment display (A/B)
: Inverter frequency is exchanged to decimal notation.
: [∗ ∗ ] [∗ ∗ H] (Normal display by pushing <SW05>)
6
7
Outdoor fan step
A
B
A
[FP]
Step 0 to 31: [ 0 to 31]
Compressor backup
Displays No.1 compressor setup status
Normal: [ ], Backup setup: [C1]
B
Displays No.2 compressor setup status
Normal: [ ], Backup setup: [C2]
8
9
—
A
B
—
—
Control valve output data
Displays control output status of solenoid valve
A
B
… … …
4-way valve: ON
H. 1
H. 0
2. 1
2. 0
3. 1
3. 0
3. 0
3. 0
… … …
4-way valve: OFF
…
10
11
SV2: ON / SV5: OFF
5. 0
…
SV2: OFF / SV5: ON
5. 1
SV3A: ON / SV3B: OFF / SV3C: OFF /SV3D: OFF
0 0 0
1 0 0
0 1 0
0 0 1
SV3A: OFF / SV3B: ON / SV3C: OFF /SV3D: OFF
SV3A: OFF / SV3B: OFF / SV3C: ON /SV3D: OFF
SV3A: OFF / SV3B: OFF / SV3C: OFF /SV3D: ON
…
…
12
13
SV41: ON / SV42: OFF
4.
1 0
…
…
SV41: OFF / SV42: ON
4.
0 1
… … … … …
… … … … …
—
—
14
15
16
PMV1 /PMV2 opening
—
Displays opening data (Decimal) (Total opening)
∗ ∗
∗ ∗. P
…
—
∗
∗ ∗. P
Oil level judgment status
A
B
[oL]
<SW05> push SW function: The following data is displayed for 2 seconds.
* During oil shortage in compressor 1: [L ],
during oil shortage in compressor 2: [ L]
…
…
… … …
Initial display: [
Judgment result of compressor 1 in [#], compressor 2 in [∗]
(0: Normal, 1, 2: Shortage) is displayed.
], Oil level judgment result: [A. #. ∗]
91
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3. Data display of outdoor cycle (Displayed on each outdoor unit)
SW01 SW02 SW03
Display contents
1
1
2
Pd pressure data
Ps pressure data
Pd pressure (MPaG) is displayed with decimal data.
(MPaG: Approx. 1/10 value of kg/cm2G data)
A
B
P d. ∗. ∗ ∗
P S. ∗. ∗ ∗
P L. ∗. ∗ ∗
2
3
4
Ps pressure (MPaG) is displayed with decimal data.
PL pressure conversion data Estimated pressure of liquid line (MPaG) is displayed with decimal data.
TD1 sensor data
TD2 sensor data
TS1 sensor data
TS2 sensor data
TE sensor data
TL sensor data
TO sensor data
TK1 sensor data
TK2 sensor data
TK3 sensor data
TK4 sensor data
—
Temperature sensor data (°C) is displayed
with decimal notation.
Symbol
Data
t d
∗
1 1 1
∗ ∗. ∗
2 1 1
∗ ∗. ∗
1 1 1
∗ ∗. ∗
2 1 1
∗ ∗. ∗
—
• Symbol display for 1 sec. and data display for 3 sec. are
alternately displayed.
5
6
Symbol
Data
t d
∗
• Data is displayed in [∗].
Symbol
Data
t S
∗
• Negative data is displayed as [– ∗ ∗ ∗ ∗].
7
Symbol
Data
tS
∗
8
Symbol
Data
tE
—
t L
∗
—
9
Symbol
Data
∗ ∗. ∗
∗ ∗. ∗
∗ ∗. ∗
∗ ∗. ∗
∗ ∗. ∗
∗ ∗. ∗
10
11
12
13
14
15
16
Symbol
Data
t o
∗
Symbol F 1
Data
Symbol F 2
Data
Symbol F 3
Data
Symbol F 4
∗
∗
∗
Data
∗
A
B
A
B
—
—
—
—
4. Data display of indoor unit information (Displayed on the header unit only)
SW01 SW02 SW03
Display contents
… …
… … …
4
1 to 16 1 to 3 Receiving status of
B
Receiving time: [
1], Not received: [
]
indoor BUS communication
5
6
Indoor check code
B
B
No check code: [– – –]
…
…
…
…
…
Indoor capacity
(HP) horse power
0. 2, 0. 5, 0. 8,
1, 1. 2, 1. 7,
2, 2. 5,
3, 3. 2,
4,
5,
…
…
6,
8, 1 0, 1 6, 2 0
… … … …
7
Indoor request command
(S code)
B
Data is displayed with Hexadecimal notation [
0 to
F] : Heating
8
Indoor PMV opening data
Indoor TA sensor data
Indoor TF sensor data
Indoor TCJ sensor data
Indoor TC1 sensor data
Indoor TC2 sensor data
B
B
B
B
B
B
Data is displayed with Hexadecimal notation
Data is displayed with Hexadecimal notation
Data is displayed with Hexadecimal notation
Data is displayed with Hexadecimal notation
Data is displayed with Hexadecimal notation
Data is displayed with Hexadecimal notation
9
10
11
12
13
NOTE) Indoor address No. is chosen by changing SW02 and SW03.
SW03 SW02
Indoor address
7-segment display A
[01] to [16]
1
2
3
1 to 16 SW02 setup number
1 to 16 SW02 setup number + 16
1 to 16 SW02 setup number + 32
[17] to [32]
[33] to [48]
92
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5. Outdoor EEPROM write-in error code display (Displayed on the header unit only)
∗ The latest error code written in EEPROM of each outdoor unit is displayed.
(It is used when confirming the error code after power supply has been reset.)
Set SW01 to 03 as shown in the following table, and the push SW04 for 5 seconds or more to display an error code.
7-segment display
W01 SW02 SW03
Display contents
A
B
1
1
2
3
16
The latest error code of the header unit 1 (U1)
The latest error code of the follower unit 1 (U2)
The latest error code of the follower unit 2 (U3)
E. r
E. r
E. r
1. – –
2. – –
3. – –
n 7-segment display A, B
Display A
Display B
D600
D601
D602
D603
D604
7-7. Sensor Characteristics
Indoor Unit
n Temperature sensor characteristics
Characteristic-1
200
150
100
50
20
15
10
5
40
30
20
10
Indoor TA sensor
Indoor TC1, TC2, TCJ sensors
Characteristic-2
0
0
0
10 20 30 40 50
Temperature [˚C]
-30 -20 -10
0
10 20 30 40 50 60 70 80 90 100
Temperature [˚C]
93
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Wired remote controller
(Up to 2 units)
Weekly timer
Function setup
Key switch
Display
LCD
Display
LCD
LCD
driver
CPU
Display
LED
CN2 CN1
Function setup
Key switch
CPU
3
*
DC5V
DC5V
Remote controller
communication circuit
Power
circuit
Power
circuit
Secondary
battery
Indoor unit
#1
A
B
#2
A
B
#3
A
B
Network adaptor (Option)
Max. 8 units are connectable. *1
Indoor control P.C. board (MCC-1402)
Remote controller
*1 However in a case that the
network adaptor is installed
when 2 remote controllers
are connected, maximum
7 units are connectable.
Network
Remote
communication circuit
adaptor
controller
communication
circuit
P.C. board
(MCC-1401)
DC5V
EEPROM
TA sensor
TCI sensor
CPU
H8/3687
*2 The network adaptor is
installed to only one unit.
DC12V
Same
as left
*2
Same
as left
*2
DC5V
Power circuit
Switch setup
*3 The weekly timer cannot be
connected to the simple
wired remote controller.
Transformer
TC2 sensor
CPU
H8/3039
Driver
*4 Nome for high wall spearate
sold parts for under ceiling.
TCJ sensor
*4
PMV
Float input
HA
CPU
TMP88CH
47FG
Louver
motor
U1 U2
U1 U2
(TMP88PH47FG)
None for Concealed
Duct type
L
N
L
N
Outside
output
BUS
communication
circuit
*4
Drain
pump
Start
Fan motor
Alarm
Power
supply
Power
supply
control circuit
Ready
AC
Thermostat ON
Power
circuit
synchronous
signal input
circuit
COOL
HEAT
FAN
Outdoor
unit
Outdoor
unit
Indoor
fan
motor
DC
280V
L
N
U1
U1
U2
U2
Indoor/Outdoor
communication
Outdoor unit
Power supply
1Ø220-240V, 50Hz
1Ø220V, 60Hz
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Indoor unit
#1
A
B
Wireless remote
controller kit
Network adaptor (Option)
#2 A
B
#3 A
B
Sensor P.C. board
Indoor control P.C. board (MCC-1402)
Network
Remote controller
communication circuit
Remote
adaptor
Remote controller
Emergent
operation
SW
controller
communication
circuit
P.C. board
(MCC-1401)
communication circuit
DC5V
EEPROM
TA sensor
TCI sensor
TC2 sensor
TCJ sensor
Power
circuit
CPU
CPU
H8/3687
Buzzer
Function
setup
SW
DC5V
Same
as left
*2
Same
as left
*2
Sensor
circuit
Display
LED
Power
circuit
Switch
setup
DC12V
CPU
H8/3039
Transformer
*3
Float input
None for
Concealed Duct
PMV
Driver
HA
Louver
motor
U1 U2
U1 U2
L
N
L
N
None for Concealed
Duct type
*3
Power
supply
Power
supply
CPU
TMP88CH
47FG
Drain
pump
BUS
communication
circuit
Outdoor
unit
Outdoor
unit
Outside
output
(TMP88PH47FG)
Start
Indoor
fan motor
Fan motor
control circuit
Alarm
Ready
AC
Thermostat ON
COOL
synchronous
signal input
circuit
Power
circuit
HEAT
FAN
DC280V
L
N
U1
U1
U2
U2
Indoor/Outdoor
communication
Max. 8 units are connectable. *1
*1 However in a case that the network adaptor is installed
when 2 wireless remote controller kits are connected,
maximum 7 units are connectable.
Outdoor unit
Power supply
1Ø220-240V, 50Hz
1Ø220V, 60Hz
*2 The network adaptor is installed to only
*3 Nome for high wall spearatesold parts for under ceiling.
One unit.
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Wired remote controller
Weekly timer
Display
LCD
LCD
driver
Function setup
Key switch
Display
LCD
CPU
CN2 CN1
Function setup
Key switch
Display
LED
CPU
DC5V
DC5V
Power
circuit
Remote
controller
Power
circuit
Secondary
battery
communication
circuit
3
*
Indoor unit
#1
#2
A
B
#3
A
B
A
B
Wireless remote
controller kit
Network adaptor (Option)
Sensor P.C. board
Indoor control P.C. board (MCC-1402)
Remote
controller
communication
circuit
Network adaptor
P.C. board
(MCC-1401)
Remote
controller
communication
circuit
Remote
controller
Emergent
operation
SW
communication
circuit
DC5V
EEPROM
TA sensor
TCI sensor
TC2 sensor
TCJ sensor
DC5V
Power
CPU
CPU
Same
as left
Same
as left
H8/3687
circuit
DC5V
*2
*2
Power circuit
Transformer
Switch setup
Buzzer
Function
setup
SW
Sensor
circuit
Display
LED
CPU
H8/3039
DC12V
*4
Float input
None for
PMV
Driver
Louver
motor
Concealed Duct
U1 U2
U1 U2
HA
L
N
L
N
CPU
TMP88CH
47FG
None for Concealed
Duct type
BUS
communication
circuit
*4
Outside
output
Drain
pump
(TMP88PH47FG)
Power
supply
Power
supply
Start
Alarm
Ready
AC
Indoor
fan motor
Fan motor
control circuit
synchronous
signal input
circuit
Outdoor
unit
Outdoor
unit
Thermostat ON
COOL
Power
circuit
HEAT
FAN
DC
280V
L
N
U1
U1
U2
U2
Indoor/Outdoor
communication
Max. 8 units are connectable. *1
*1 However in a case that the network adaptor is installed, maximum 7 units are connectable.
*2 The network adaptor is installed to only one unit.
Outdoor unit
Power supply
1Ø220-240V, 50Hz
1Ø220V, 60Hz
*3 The weekly timer cannot be connected to the simple wired remote controller.
*4 Nome for high wall spearate sold parts for under ceiling.
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Filter/Option error input
Microcomputer operation LED
EEPROM
DC fan output
Power supply
Optional
power supply
PMV output
Remote controller
power supply LED
DC fan return
*1
Drain pump output
*1
Float SW
Fan output
HA (T10)
TCJ sensor
EXCT
Remote controller inter-unit cable
TC1 sensor
TA sensor
Used for
servicing
DISP
CHK
Indoor/Outdoor communication
(Also used for communication of the
central control system)
Optional output
Flap
*1
TC2 sensor
(Used only for 4-way Air
Indoor/Outdoor communication (Spare)
Discharge Cassette Type,Under ceiling type)
*1 : Used only for under-ceiling, high wall
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8-1-3. Optional Connector Specifications of Indoor P.C. Board
Connector Pin
Function
Specifications
DC12V
Remarks
No.
No.
‚
Humidifier output
CN66
In heating, thermo ON, Fan ON, Humidifier output ON
* Humidifier provided, Drain pump ON is set up by CN70
short-circuit or from remote controller. (DN=40)
Output
DC12V
Fan output
CN32
CN61
Shipment setup: ON with indoor unit operation and OFF
with stop are linked.
* Single operation by FAN button on remote controller is set
up from remote controller (DN=31)
Output
‚
—
ON/OFF input
HA ON/OFF input
(J01:YES/NO=Pulse (At shipment) / Static input select)
0V (COM)
‚
ƒ
Main prohibition input Operation stop of main remote controller is permitted /
prohibited by input.
Operation output
DC12V (COM)
Alarm output
ON during operation (Answerback of HA)
„
ꢀ
†
‚
ƒ
„
ON during alarm output
Option output
CN60
DC12V (COM)
Defrost output
Thermo ON output
COOL output
ON when outdoor unit is defrosted
ON during Real thermostat ON (Compressor ON)
ON when operation mode is cooling system
(COOL, DRY, Cool/Heat Auto cooling)
HEAT output
Fan output
ON when operation mode is heating system
(HEAT, Cool/Heat Auto cooling)
ꢀ
†
ON when indoor fan is ON
(During use of air cleaner/Interlock cabling)
Outside error input
CN80
DC12V (COM)
DC12V (COM)
Outside error input
—
Generate check code “L30” (for 1 minute continuously) to
stop forcedly the operation.
‚
ƒ
—
—
CN20
CN70
CN71
—
—
—
—
—
CHK operation check
Check mode input
Used for indoor operation check.
‚
(Outdoor does not communicate with remote controller, and
outputs specified operation such as indoor fan “H”, drain
pump ON, etc.)
0V
DISP exhibition mode
EXCT demand
CN72
CN73
Display mode input
Exhibition mode enables to communicate by indoor unit and
remote controller only.
(When power has been turned on.) Timer short (Usual)
‚
‚
0V
Demand input
0V
Indoor unit forced thermostat OFF operation
98
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9. DETACHMENTS
9-1. Indoor Unit
MMU-AP0071MH, AP0091MH, AP0121MH, AP0151MH, AP0181MH
Ceiling panel: RBC-UM11PG-E
Preparing work:
1. Before work, be sure to stop the power supply of the air conditioner and turn off switch of the power supply
breaker. (Otherwise an electric shock may be caused.)
2. Be sure to put on the gloves when working; otherwise an injury may be caused with parts sharp edges etc.
No.
Part name
Procedure
Remarks
1
Suction grille
1. Detachment
Suction grille
Ceiling panel
1) Slide hooks (2 positions) of the suction grille
to inner side, and then hang down the
suction grille.
2) Take off the strap that connects the panel
and the suction grille, and then lift up shaft of
the suction grille to remove the suction grille.
Hook of suction grille
Hook hole of ceiling panel
Hook of
fall-preventive strap
2. Attachment
1) Hook shaft of the suction grille to the panel.
2) Hook strap of the suction grille to the original position of the panel.
3) Close the suction grille and slide the hooks outward to fix it.
2
Electric parts
cover
1. Detachment
Screws
Temporary hanging hook
1
1) Perform work of procedure
-1.
2) Take off screws (Ø4 × 10, 3 pcs.) fixing the
electric parts cover.
3) Remove the electric parts cover from the
temporary hanging hook of the electric parts
cover, and then open the cover.
2. Attachment
1) Close the electric parts cover and hook the
cover hole to the temporary hanging hook.
2) Tighten the fixing screws. (Ø4 × 10, 3 pcs.)
Screw
Unnecessary to remove this hook.
99
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No. Part name
Procedure
Remarks
3
Adjust
corner cover
1. Detachment
1) Perform work of procedure of
1
-1.
2) Turn clockwise screws (4 positions) at the
suction port corner until adjust corner
cover rises up.
NOTE)
When you work, keep the torque at below 12N•m.
Do not use an electric screwdriver; otherwise the
mechanism of adjust corner cover may be
damaged and not be removed.
1
2
Torque~12N·m
3) Pull downward the risen-up part of adjust
corner cover and remove it.
4) Remove the strap of adjust corner cover.
1
2
2. Attachment
1) Attach the strap of adjust corner cover to
the panel, hook claws of adjust corner
cover to the panel corner, and then push
the opposite side into the panel.
2) Turn screws (4 positions) of the suction
port corner counterclockwise until bump
between adjust corner cover and panel
disappears.
NOTE)
When you work, keep the torque at below 12N•m.
Do not use an electric screwdriver;
otherwise the mechanism of adjust corner cover
may be damaged and not be removed.
Torque~12N·m
3
4
Ceiling
panel
1. Detachment
1
2
1) Perform works of procedure
-1-,
-1,
Hanging
3
and
-1.
section of tentative
hook of ceiling panel
2) Remove the flap connector (CN33, White,
5P) connected to the control P.C. board
and then take off the lead wire from the
clamp.
Temporary
bracket
Push to remove
NOTE)
Drain piping
corner
Remove the connectors after unlocking the lock
of the housing.
3) Take off screws (M5, 4 pcs.) fixing the
ceiling panel.
4) Push the temporary bracket to inner side
to remove the ceiling panel.
Temporary
bracket
Ceiling panel
2. Attachment
1) Hook the panel to the temporary bracket of
the drain pan of the main body.
NOTE)
The panel has directionality. Therefore mount the
panel according to the temporary bracket and the
bracket mounting position.
Washer
based screw
Hanging section
of temporary bracket
2) Tighten the fixing screws. (M5, 4 pcs.)
3) Connect flap connector of the ceiling
panel to the connector
CN33
(CN33, White, 5P) of the control
P.C. board.
Cable clamp
100
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No. Part name
Procedure
Remarks
5
1. Detachment
1) Perform works of procedure
Control P.C.
board
1
2
-1- and
-1.
2) Remove the connectors connected from the control P.C. board to other parts.
CN33 : Flap motor (5P, White)
CN34 : Float switch (3P, Red)
CN41 : Terminal block of remote controller (3P, Blue)
CN40 : Terminal block of crossover between inside and outside (2P, Blue)
CN68 : Drain pump (3P, Blue)
CN67 : Terminal block of power supply (3P, Black)
CN100: TC1 sensor (3P, Brown)
CN101: TC2 sensor (2P, Black)
CN102: TCJ sensor (2P, Red)
CN104: Room temp sensor (2P, Yellow)
CN82 : PMV (6P, Blue)
CN333: Fan motor power supply (5P, White)
CN334: Fan motor position detection (5P, White)
Ferrite core for sensor lead
NOTE)
Remove the connectors after
unlocking the lock of the housing.
3) Unlock the lock of the card
edge spacer (6 positions)
and then remove the
control P.C. board.
Card edge spacer
Drawing-out port of lead wire Ferrite core for fan motor
2. Attachment
1) Fix the control P.C. board to the card edge spacer. (6 positions)
2) Connect the connectors as original before being removed in item 1.
NOTE)
For drawing of each wire and position of ferrite core, perform wiring same as those before
removing. If there is incomplete drawing of wire, short or water leakage of the parts may be
caused.
Enlarged drawing
Fix the lead wires with cord clamp
so that the lead wires do not slacken
at P.C board side. (2 positions)
Cord clamp
Arrow view
As shown in the figure, store PMV lead wire
connected with connector assembly so that the
connector positions under wire of the terminal.
Be sure that the
float switch lead wire positions
Details of PMV lead wire drawing
at inner side of the fan motor lead wire.
Fix the sensor lead wires firmly with the cord clamp so that
they do not touch with the caution plate of the terminal block
and they do not slacken at P.C. board side. (3 positions)
Cord clamp
Fold back the float switch lead wire
and fix surely with cord clamp.
(There is no catching-in of P.C. board
and lead wire.)
Arrange the clamp at the position as shown in the figure.
Cord clamp
Arrange at position
as shown in the figure.
Details of fan motor lead wire drawing
Fold back the sensor lead wire and
fix it surely with the cord clamp.
Adhere on the transformer.
Details of sensor lead wire drawing
101
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No. Part name
Procedure
Remarks
1. Detachment
1) Perform works of procedure
6
Electric
parts box
1
2
-1-and
-1.
2) Remove connectors of the lead wire connected to the following connectors of the control
P.C. board.
CN33 : Flap motor (5P, White)
CN34 : Float switch (3P, Red)
CN68 : Drain pump (3P, Blue)
CN100: TC1 sensor (3P, Brown)
CN101: TC2 sensor (2P, Black)
CN102: TCJ sensor (2P, Red)
CN82 : PMV (6P, Blue)
CN333: Fan motor power supply (5P, White)
CN334: Fan motor position detection (5P, White)
NOTE)
Remove the connectors after unlocking the lock of the housing.
3) Remove each lead wire
from cord clamps in the
electric parts box.
Ferrite core for sensor lead
4) Remove the power supply
wiring, remote controller
wiring, and crossover wiring.
5) Take off screws
(Ø4 × 10, 2 pcs.)
Card edgee spacer
Drawing-out port of lead wire Ferrite core for fan motor
2. Attachment
1) Tighten screws (Ø4 × 10, 2 pcs.) fixing the electric parts box.
2) Connect the connectors as original before being removed in item 1.
3) Perform power supply wiring, remote controller wiring, and crossover wiring between inside
and outside.
NOTE)
For drawing of each wire and position of ferrite core, perform wiring same as those before remov-
ing. If there is incomplete drawing of wire, short or water leakage of the parts may be caused.
Enlarged drawing
Fix the lead wires with cord clamp
so that the lead wires do not slacken
at P.C board side. (2 positions)
Cord clamp
Arrow view
As shown in the figure, store PMV lead wire
connected with connector assembly so that the
connector positions under wire of the terminal.
Be sure that the
float switch lead wire positions
Details of PMV lead wire drawing
at inner side of the fan motor lead wire.
Fix the sensor lead wires firmly with the cord clamp so that
they do not touch with the caution plate of the terminal block
and they do not slacken at P.C. board side. (3 positions)
Cord clamp
Fold back the float switch lead wire
and fix surely with cord clamp.
(There is no catching-in of P.C. board
and lead wire.)
Arrange the clamp at the position as shown in the figure.
Cord clamp
Arrange at position
as shown in the figure.
Details of fan motor lead wire drawing
Fold back the sensor lead wire and
fix it surely with the cord clamp.
Adhere on the transformer.
Details of sensor lead wire drawing
102
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No. Part name
Procedure
Remarks
7
Fan guard
1. Detachment
1) Perform work of procedure
Fan guard
1
-1.
2) Take off screws fixing the fan guard.
(Ø4 × 10, [Screws for plastic molding] 4 pcs.)
NOTE)
The specification of fixing screws for the fan guard
differs from those of other fixing screws.
Therefore keep them separately from other screws.
2. Attachment
1) Attach screws for fixing the fan guard.
(Ø4 × 10, [Screws for plastic molding] 4 pcs.)
4 screws
8
Bell mouth
1. Detachment
Fixing claws
for lead wires
6
1) Perform work of procedure
-1.
Bell mouth
2) Take off the lead wires of the drain pump, float
switch, and fan motor from the bell mouth.
3) Take off fixing screws of the bell mouth.
(Ø4 × 10, 4 pcs.)
2. Attachment
1) Mount the bell mouth with screws.
(Ø4 × 10, 4 pcs.)
2) Perform wiring as original before being
removed.
NOTE)
Pinch lead wire of the drain pump and float switch
with lead wire fixing claws of the bell mouth and
perform wiring along the guide.
4 screws
Fixing claws
for lead wires
9
Turbo fan
1. Detachment
Fan motor fixing
M6 nut
Drawing-out port of
fan motor lead wire
8
1) Perform work of procedure
-1.
2) Take off the nut (M6 nut 1 pc.) of the turbo fan.
NOTE)
Use a box wrench for attachment and detachment of
the turbo fan. If using a monkey wrench etc, the
other parts may be damaged in work.
2. Attachment
1) Insert the turbo fan into the fan motor so that
boss of the turbo fan matches with cut surface
of the fan motor, and then tighten it with nut.
NOTE)
Tightening torque of turbo fan: 5.9 ± 0.6N.m
Apply looseness-preventing agent to the nut after
tightening.
Turbo fan
103
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No. Part name
Procedure
Remarks
10
Fan motor
1. Detachment
1) Perform work of procedure
Fixing nut for fan motor
9
.
2) Take off screws fixed with lead holding bracket
of the fan motor. (Ø4 × 10, 2 pcs.)
3) Open wiring holding part of the fan motor lead
holding bracket and then take off the fan motor
lead wire from the bracket.
4) Take off fixing nuts for the fan motor to remove
the fan motor.(M 3 pcs.)
Fan motor
NOTE)
Use a box wrench for attachment and detachment of
the fan motor fixing nuts; otherwise contact or
damage for other parts may be caused.
Fan motor
earthh wire
Fixing screw
Holding metal fitting
for fan motor lead wire
2. Attachment
1) Mount the fan motor with the fixing nuts.
NOTE)
Tightening torque of turbo fan: 5.9 ± 0.6N.m
Apply looseness-preventing agent (as paints) to the
nut after tightening.
2) Attach the fan motor lead wire holder.
NOTE)
• For the fan motor lead wire, fix the lead wire
holding bracket along concave part of the ceiling
panel. (There is no catch-in of lead wire and ceiling
panel.)
• When fixing the lead wire bracket, tighten fan
motor earth together with the lead wire.
• For this work, do not use an electric screwdriver.
• Take note the damage of earth terminal.
Wiring holding bracket
3) Bend the lead wire holding part and fix the fan
motor lead wire.
NOTE)
Be sure that the lead wire does not come to contact
with the heat exchanger.
Fan motor lead wire
Concave part
of ceiling panel
104
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No. Part name
Procedure
Remarks
11 Drain pan
1. Detachment
1) Perform works of procedure
2 screws
4
8
-1 and
-1.
2) Remove the drain cap and extract drain water
accumulated in the drain pan.
NOTE)
Socket of drain pan
When removing the drain cap, be sure to receive
drain water with a bucket, etc.
3) Take off screws fixing the drain pan to remove
the drain pan. (Ø4×10, 4 pcs.)
Drain pan
2. Attachment
1) Insert the drain cap into the drain pan.
NOTE)
Put a stick or others into hole at center of the drain
cap, and then insert the drain cap until it strikes on
the socket of the drain pan.
2 screws
2) Draw each lead wire to the correct positions,
and then insert the drain pan into the main
unit.
NOTE)
Piping holder rib
Draw lead wires of the drain pump and the float
switch along the guide of the cabinet. Insert the drain
pan along the guides of sensors (TC1, TC2, TCJ)
and PMV lead wire.
The drain pan and each lead wire are not caught in;
otherwise water leakage may be caused.
3) Fix the drain pan with screws. (Ø4 × 10, 4 pcs.)
Piping holder
Hose band
Lead wire
12
Drain pump
1. Detachment
assembly
Drain pummp assembly
1) Perform work of procedure 11 -1.
2) Pick up the hose band and slide it from the
pump connecting part to remove the drain
hose.
3) Take off screws (Ø4 × 10, 3 pcs.) fixing the
drain pump assembly, and then move hooking
claw (1 position) of the main body from the
drain pump assembly to remove the drain
pump assembly.
2. Attachment
White marked position
1) Fix the drain pump assembly as original.
Drainn hose
NOTE)
For fixing, use a hooking claw (1 position) and
screws (3 positions).
When screwing, be sure not to run on the hooking
claw at main body side.
2) Mount the drain hose and the hose band as
original.
NOTE)
Insert the drain hose up to the end of pump connect-
ing part, and then put the band at white marked
position of the hose.
Fixingg screw
for draain pump
Hooking claw
for drain pump
105
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No.
Part name
PMV
Procedure
Remarks
13
1. Detachment
(Pulse Motor Valve)
1) Perform work of procedure 11 -1.
2) Take off screws (Ø4 × 10, 3 pcs.) fixing
the piping cover to remove the piping
cover.
Pipingg cover
3) Cut off binding band that binds the PMV
lead wires.
4) Peel butyl rubber of PMV a little and
remove PMV motor with a spanner
wrench.
NOTE)
For attachment and detachment of PMV motor,
use a 14mm or 19mm spanner wrench.
3 screws
2. Attachment
PMV body
PMV nut
1) Mount PMV motor with a spanner
wrench.
NOTE)
PMV motor tightening torque: 7.84 ± 0.78N.m
2) Perform wiring of PMV and sensor lead
as original.
NOTE)
Arrange each wire as original.
3) Fix the piping cover with screws.
<Details of sensor lead wire drawing>
As shown in the figure, make draining shape on the
lead wire (Black) once, and then fix it with bind band.
Fix the head of bind band and lead wire at inner side of the
position in the figure so that they do not stick out to outside.
Sensor lead wire (Black)
Insert the sensor lead wires (Red), (Blue), (Black)
from the positions in the figure.
Do not turn the head
of bind band upward.
Heat-insulation pipe
(Liquid pipe)
Sensor lead (Black)
Sensor lead wire
(Red)
Sensor lead
(Red)
PMV motor
Sensor lead
(Blue)
Details of A part
A
Heat-insulation pipe
(Gas pipe)
Sensor lead wire (Blue)
Sensor lead wires
(Red) (Blue)
As shown in the figure, hook the
sensor and PMV lead wires to the
claw of the No.13 piping cover,
and then pass them so that they
are stored in this groove.
Sensor lead wire (Black)
PMV lead wire
When mounting the piping cover,
check each lead wire
does not hit PMV motor.
(PMV lead
from foot)
(Inner
sparkle side)
Bind band
B
Arrow view B
Bundle each sensor lead wire (Red), (Blue), (Black),
and PMV lead wire, fold back toward you at position
in the figure, and then fix them with bind band.
106
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No. Part name
Procedure
Remarks
14
Heat
1. Detachment
exchanger
1) Recover refrigerant gas.
2) Remove the refrigerant pipe at indoor unit
side.
3) Perform work of procedure 11 -1.
4) Take off screws (Ø4 × 10, 3 pcs.) fixing the
piping cover to remove the piping cover.
5) While holding the heat exchanger, remove
fixing band and fixing screws (Ø4 × 10, 3 pcs.)
and then remove the heat exchanger.
2. Attachment
1) Mount parts in order, heat exchanger
→ fixing band → piping cover → drain pan
→ bell mouth → electric parts box as original.
NOTE)
Arrange wires as original.
2) Attach the removed connectors and wires as
original.
Fixing band
Fixing band for
heat exchanger
3) Connect the refrigerant pipe as original, and
then perform vacuuming.
2 fixing screws for heat exchanger
107
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10. P.C. BOARD EXCHANGE PROCEDURES
10-1. Exchange of P.C. Board for Indoor Service
Part code
Model type
P.C. board model
Label display on P.C. board
03DD M05
MMU-AP ✻✻ 1H series
MMU-AP ✻✻ 1MH series
MMC-AP ✻✻ 1H series
MMK-AP ✻✻ 1H series
MMD-AP ✻✻ 1SPH/SH series
MMU-AP ✻✻ 2SH series
431-6V-269
MCC-1402
Requirement at exchange of P.C. board assembly for indoor service
Before exchange, in the fixed memory (hereinafter EEPROM, IC10) installed on the indoor P.C. board, the type
exclusive to the model and the capacity code are stored at shipment from the factory. The important setup data
such as line/indoor/group address which are set up (Auto/Manual) or high ceiling exchange setup at installation
time, respectively.
Proceed with exchange of P.C. board assembly for indoor service in the following procedure.
After exchange work, check again the setup for indoor unit No. or group header/follower units to confirm whether
the setup contents are correct or not, and then check also the refrigerant circuit system by a test operation, etc.
<Exchange procedure>
Method 1
Before exchange, it is possible to turn on power of the indoor unit and read out the setup
contents from the wired remote controller.
Readout of EEPROM data: Procedure 1
ò
Exchange of P.C. board for service & power ON: Procedure 2
ò
Writing-in of the readout EEPROM data: Procedure 3
ò
Power supply reset (All the indoor units connected to the remote controller in case of group operation control)
108
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Method 2
Before exchange, it is impossible to read out the setup contents due to EEPROM error.
Exchange of P.C. board for service & power ON: Procedure 2
ò
Writing-in of the setup data such as the model name, capacity code, indoor unit address high ceiling setup,
connection setup of option,
etc to EEPROM based upon customer’s information: Procedure 3
ò
Power supply reset (All the indoor units connected to the remote controller in case of group operation control)
Procedure 1 : Readout setup contents from EEPROM
(Contents of EEPROM with setup changed at local site include setup at shipment from the factory are read out.)
SET
CL
TEST
1. Push
+
+
buttons simultaneously for 4 seconds or more.
1
∗ In a group operation control, the firstly displayed unit No. indicates the header indoor unit No.
In this case, 10 is displayed in the item code (DN).The fan of the selected indoor unit operates, and also
starts swinging in a model with flap.
UNIT
2. Every pushing
, the indoor unit Nos. in the group control are displayed successively.
2
Specify the indoor unit No. to be exchanged.
∗ The fan of the selected indoor unit operates, and also starts swinging in a model with flap.
3. Using temperature setup buttons, the item code (DN) can be moved up/down one by one.
/
3
4. First change the item code (DN) from 10 → 01 . (Setup of filter sign lighting time)
In this time, make a note of contents of the displayed setup data.
5. In the next time, change the item code (DN) using
/
buttons.
Make a note of contents of the setup data as same as the above.
6. Then repeat item 5., and make a note of contents
of the important setup data as indicated in the
Item code necessary at minimum
attached table (Example).
∗ The item code (DN) is consisted with 01 to FF .
DN
10
11
12
13
14
Contents
DN No. may jump on the way.
Type
Type and capacity of
the indoor unit are
necessary to set up
the revolution
7. When noting has finished, push TEST button to
Indoor unit capacity
Line address
return to the normal stop status.
6
Indoor address
Group address
(It requires approx. 1 minute to operate the remote
controller.)
frequency of the fan.
<Remote controller operation diagram>
SET DATA
UNIT No.
R.C.
No.
TEMP.
ON / OFF
3
5
6
1
TIMER SET
TIME
FAN
SWING/FIX
UNIT
MODE
VENT
4
2
FILTER
RESET TEST
SET CL
109
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Procedure 2 : Exchange of P.C. board for service
1. Exchange P.C. board with a P.C. board for service.
In this time, the jumper line (cut) setup or the (short-circuit) connecting connector setup on the previous P.C.
board should be reflected on P.C. board for service. (See the blow figures.)
(MCC-1402)
JP1
CN41
(MCC-1403)
JP001
CN041
CN34
CN030
From the left
CN112,111,110
When short-circuited plug is mounted to P.C. board before
change, re-mount the short-circuited plug as previons.
2. It is necessary to set Indoor unit to be exchanged : Remote controller = 1 : 1
Based upon the system configuration, turn on power of the indoor unit with one of the following items.
1) Single (Individual) operation
Turn on power of the indoor units and proceed to Procedure 3.
2) Group operation
A) In case that power of the exchanged indoor unit only can be turned on
Turn on power of the exchanged indoor unit only and proceed to Procedure 3.
B) In case that power of the indoor units cannot be turned on individually (Case 1)
a) Remove temporarily the group wire connected to the terminal blocks A and B of the exchanged
indoor unit.
b) After connecting the remote controller wire only to the removed terminal block, turn on power of the
indoor units and proceed to Procedure 3.
∗ When the above methods cannot be used, follow to the two cases below.
C) In case that power of the indoor units cannot be turned on individually (Case 2)
a) Remove all CN41 connectors of the indoor units in the same group except those of the exchanged
indoor unit.
b) Turn on power of the indoor units and proceed to Procedure 3.
∗ After Procedure 3 operation has finished, be sure to return the temporarily removed group wire or
CN41 connector to the original connection.
Service P.C. board of
the unit to be changed
Indoorunit
P.C. board
Indoorunit
P.C. board
Indoorunit
(Case 1)
A B
A B
A B
Remove the group wire of the
terminal blocks A and B of the
changed indoor unit, and then
install the remote controller only.
Group wire
Remote
controller
Service P.C. board of
the unit to be changed
Indoorunit
P.C. board
Indoorunit
P.C. board
Indoorunit
CN
41
(Case 2)
A B
A B
A B
Remove CN41 connectors
of the indoor units other
than the units to be changed
in the same group.
Group wire
Remote
controller
110
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Procedure 3 :Writing-in of setup contents to EEPROM
(The EEPROM contents which are installed on the service P.C. board have been set up at shipment from the factory.)
SET
CL
TEST
1. Push
(
+
+
buttons simultaneously for 4 seconds or more.
1
is displayed in the UNIT No box.)
In this time, 10 is displayed in the item code (DN).The fan of the indoor unit operates, and also starts
swinging in a model with flap.
2. Using temperature setup
/
buttons, the item code (DN) can be moved one step up 1 or down one
by one.
3
3. First set up the type and capacity code of the indoor unit.
(The data at shipment from the factory is written in EEPROM by changing the type and capacity code.)
1) Set 10 to the item code (DN). (As before)
2) Using the timer time
/
buttons, set up the type.
4
(For example, 0001 indicates 4-way Air Discharge Cassette type.): Refer to the attached table.
SET
3) Push
button. (OK if display goes on.)
buttons, set 11 to the item code (DN).
buttons, set up the capacity code.
5
4) Using temperature setup
5) Using the timer time
/
/
(For example, 0012 indicates 027 type.): Refer to the attached table.
SET
6) Push
button. (OK if display goes on.)
TEST
7) Push
button to return to the normal stop status.
4. In the next, the contents such as address setup, which were set up at the local site after installation are
written in EEPROM. Execute again the operation in the above item 1.).
5. Using temperature setup
/
buttons, set 01 to the item code (DN).
(Lighting time setup for filter sign)
6. Compare the contents of the setup data which is displayed in this time with contents noted in a memo in
Procedure 1 and customer’s information.
1) If data is incorrect, change it using the timer time
/
buttons so that it matches with contents noted in
SET
a memo, and then push
button. (OK if display goes on.)
2) Do nothing if data is same as those in the memo.
7. Using temperature setup buttons, change the item code (DN).
/
Check also the contents of the setup data and then change them it to those in the memo.
8. Then repeat operations in items 6. and 7.
TEST
9. After setup operation, push
button to return to the normal stop status.
6
In a group operation, turn off the power supply once, return the group wires between indoor units and CN41
connectors as before, and then turn on power of all the indoor units.
(It requires approx. 1 minute to operate the remote controller.)
∗ The item code (DN) is consisted with 01 to FF . DN No. may jump on the way.
SET
Even if pushing
button after changing the data incorrectly, the data can be returned to one before
CL
change by pushing
button before changing the item code (DN).
<EEPROM layout>
EEPROM (IC10) is attached to IC socket.To remove it, use a pair of tweezers, etc.
To attach EEPROM, arrange the direction as shown in the following figures.
∗ In exchanging time, pay attention not to bend the lead wire of IC.
P.C. board (MCC-1402)
P.C. board (MCC-1403)
EPROM (IC10)
Align notch directions of IC socket
and EEPROM for installation.
Notch
EPROM
IC socket Notch
EPROM (IC10)
111
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<Make a note of the setup contents. (Item code list (Example))>
DN
Item
Memo
Setup at shipment from factory
According to type
01 Filter sign lighting time
02 Dirty condition of filter
03 Central control address
06 Heating inlet temp. shift
0d Cooling Auto mode existence
0F Cooling only/Heat pump select
10 Type
0000: Standard
0099: Undefined
0002: +2°C (Floor standing: 0)
0001: No auto mode cooling/heating
0000: Heat pump
* Automatic selection
by connected
outdoor unit
(
)
According to model type
According to capacity code
0099: Undefined
11 Indoor unit capacity
12 Line address
13 Indoor unit address
14 Group address
0099: Undefined
0099: Undefined
19 Flap type (Air direction adjustment)
According to type
Temp. width between cooling and heating
automatic selective control points
1E
0003: 3 deg (Ts ± 1.5)
28 Automatic restart from power failure
2E HA terminal (T10) selection
32 Sensor select
0000: None
0000: Normal
0000: Body sensor
0000: Standard
0000: Possible
5d High ceiling selection
60 Timer setup (Wired remote controller)
Type
Item code [10]
Indoor unit capacity
Item code [11]
Setup
data
Model
abb. name
Setup data
0000∗
0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
0015
Model
Invalid
007 type
—
Setup data
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
~
Model
Type
—
0000
1-way Air Discharge Cassette
MMU-AP✻✻✻SH
MMU-AP✻✻✻H
MMU-AP✻✻✻WH
048 type
0001∗ 4-way Air Discharge Cassette
056 type
0002
0003
0004
0005
2-way Air Discharge Cassette
009 type
—
—
1-way Air Discharge Cassette
(Compact type)
MMU-AP✻✻✻YH
—
Concealed Duct Standard
Slim Duct
MMD-AP✻✻✻BH
012 type
—
072 type
MMD-AP✻✻✻SPH
MMD-AP✻✻✻SH
—
015 type
—
096 type
0006
0007
0008
0009
0010
0011
0012
0013
Concealed Duct High Static Pressure MMD-AP✻✻✻H
Under Ceiling
High Wall
MMC-AP✻✻✻H
—
—
—
—
—
—
—
MMK-AP✻✻✻H
018 type
—
Floor Standing Cabinet
MML-AP✻✻✻H
MML-AP✻✻✻BH
MMF-AP ∗∗∗ H
MMF-AP✻✻✻H
024 type
027 type
030 type
—
Floor Standing Concealed
(Floor Standing 8, 10HP)
Floor Standing (Below 6HP)
0034
Compact 4-way Air Discharge
Cassette
0014
MMU-AP✻✻✻MH
036 type
∗ The initial setup value of EEPROM installed on the service P.C. board
112
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11. EXPLODED VIEWS AND PARTS LIST
11-1. Ceiling Panel
RBC-UM11PG(W)E
308
316
302
315
307
314
309
311
304
312
310
313
305
303
306
301
Location
No.
Location
No.
Part No.
Description
Part No.
Description
301
302
303
304
305
306
307
308
43109414 Grille, Air Inlet
4302C059 Motor, Louver
43180332 Air Filter
43497012 Screw
43100322 Cover, Panel Ass’y
43107259 Grille, Catch
309
310
311
312
313
314
315
316
43122091 Joint, Kit (A)
43122092 Joint, Kit (B)
43122093 Louver
43107261 Outlet, Air Form
43100369 Panel
43107262 Fix, Motor
43107263 Fix, Motor
43160580 Lead, Motor
43122089 Cover, Joint (For Joint)
43122090 Cover, Joint (For Motor)
113
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11-2. Compact 4-way Air Discharge CassetteType
MMU-AP0071MH, AP0091MH, AP0121MH, AP0151MH, AP0181MH
234
223
245
202
221
203,
204
231
228
201
209,
210
235
236
241
205
247
233
237
224
242, 234, 244
222
238, 239, 240
226
225
229
227
229
206
206 230
230
215
213
215
213
207
208
220
220
232
232
219
218
217
214
216
246
211
0151MH, 0181MH
212
0071MH, 0091MH, 0121MH
114
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Model Name MMU-AP
Location
No.
Part No.
Description
Remarks
0071MH 0091MH 0121MH 0151MH 0181MH
201
202
203
204
205
206
207
208
43120225 Fan Ass’y, Turbo
43122094 Bell Mouth
1
1
1
1
1
1
1
1
1
1
1
1
43172185 Pan Ass’y, Drain
43172186 Pan Ass’y, Drain
43121738 Motor, Fan
1
1
1
1
1
1
1
1
1
1
1
1
SWF-230-60-1R
EDM-MD12TF-3
EDM-B25YGTF-3
EDM-B40YGTF-3
1
1
1
1
43146707 Motor, PMV
43146713 Valve, PMV
43146714 Valve, PMV
1
1
1
1
Refrigeration
4314J263
209
210
Cycle Ass’y
Refrigeration
4314J264
1
1
1
Cycle Ass’y
211
212
213
214
215
216
217
218
219
220
221
222
223
4314Q006 Distributor Ass’y
4314Q007 Distributor Ass’y
43047685 Nut, Flare
43049776 Socket
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1/4 IN
3/8 IN
1/4 IN
1/2 IN
1/2 IN
43149351 Socket
1
1
1
1
1
1
43047688 Nut, Flare
43149353 Socket
43047609 Bonnet
1
1
1
43147195 Bonnet
1/2 IN
1
1
1
1
2
1
1
1
1
2
43049697 Bonnet
1
1
1
2
1
1
1
2
1
1
1
2
43170244 Hose, Drain
43079249 Band, Hose
43060029 Filter, Noise
Holder, Lead,
43163052
224
1
1
1
1
1
Fan Motor
225
226
227
228
229
230
231
232
233
234
235
236
43119482 Cover Ass’y Body
43170248 Hose, Drain
43119483 Cover, Pipe
43097212 Nut
1
1
1
1
1
2
1
1
3
1
1
1
1
1
1
1
1
2
1
1
3
1
1
1
1
1
1
1
1
2
1
1
3
1
1
1
1
1
1
1
1
2
1
1
3
1
1
1
1
1
1
1
1
2
1
1
3
1
1
1
43107215 Holder, Sensor
43019904 Holder, Sensor
43179135 Band, Hose
43149314 Sheet, PMV
43139137 Rubber, Cushion
43162056 Cover, E-Box
43177001 Pump, Drain
43151289 Switch, Float
Rubber,
43179126
237
3
3
3
3
3
Pump Drain
238
239
240
241
242
243
244
245
246
247
43166002 Remote Controller
43166004 Remote Controller
43166005 Remote Controller
43166006 Remote Controller
4311M422 Owner’s Manual
4318T727 Owner’s Manual
4318T631 Owner’s Manual
43119475 Guard Fan
SX-A1EE
SX-A11JE2
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
EX-W2JE2
WH-H1JE2
MMY-MAP1201HT8
MCY-MAP0401HT
MMY-MAP1201FT8
43149355 Nut, Flare
3/8 IN
43197155 Washer
3
3
115
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401
403
406
402
404
405
Model Name MMU-AP
Location
No.
Part No.
Description
0071MH 0091MH 0121MH 0151MH 0181MH
401
402
403
404
405
43050425 Sensor Ass’y, Service, TC
43050426 Sensor, Service, TA
43050320 Sensor Ass’y, Service, TG
43160574 Terminal, 4P
2
1
1
1
1
2
1
1
1
1
2
1
1
1
1
2
1
1
1
1
2
1
1
1
1
43160575 Terminal Block, 2P, 20A
P.C. Board Ass’y,
4316V289
406
1
1
1
1
1
MCC-1402
116
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TOSHIBA CARRIER CORPORATION
2 CHOME 12-32, KONAN, MINATOKU, TOKYO, 108-0075, JAPAN
Copyright © 2005 TOSHIBA CARRIER CORPORATION, ALL Rights Reserved.
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