LG
LG
Room Air Conditioner
SERVICE MANUAL
MODELS: LAN181CNW(ASNC183VML3)
LAU181CNW(ASUC183VML3)
LA180CPI (ASNC183VML3)
LA180CPO (ASUC183VML3)
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
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Details of 2006 LG Model Name
Details of 2006 LG Model Name
3
4
5
6
7
8
9
10
1
2
-
Code
Type
Code of Model
Meaning
1
Producing Center/
Refrigerant
A~Z
L: ChangWon R22, A: ChangWon R410A, C: ChangWon R407C
2
3
Type of Air conditioner
Cooling/Heating
A~Z
A~Z
1~9
S: Split Type Air conditioner
C: C/O, H: H/P, X: C/O + E/H, Z: H/P + E/H
4,5
Capacity(Btu/h)
Cooling/Heating Capacity
Ex. "09" ➔ 9,000Btu/h
6
Electric Range
1~9
Electric Standard
1 ➔ 115V/60Hz
2 ➔➔220V/60Hz
3 ➔ 208~230V/60Hz
5 ➔ 200~220V/50Hz
6 ➔ 220~240V/50Hz
7 ➔ 110V, 50/60Hz
8 ➔ 380~415V/50Hz
9 ➔ 380~415V/60Hz
7
8
Chassis
Color
A~Z
A~Z
Name of tool of unit
R: Mirror
W: White
B: Blue
M: Metal
N: Walut
C: Cherry
Basic
Basic + 4Way
Plasma Filter
Plasma Filter + 4Way
Tele + LED + 4Way
Tele + LCD + Plasma F + 4Way
Tele Multi + LCD + Plasma F + 4Way
Low A + Plasma F
A
B
C
D
E
F
G
H
J
9
Function
A~Z
Low A + Plasma F + 4Way
Plasma F + 4Way + Oxygen Generator
A/change + Plasma F
K
L
A/change + Plasma F + 4Way
M
10
Serial No.
0~9
Service Manual 3
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Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
➔ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
➔ Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
➔ Installation
Do not use damaged power
cords, plugs, or a loose socket.
For electrical work, contact the
dealer, seller, a qualified electri-
cian, or an Authorized Service
Center.
Always use the power plug and
socket with the ground terminal.
• There is risk of fire or electric
shock.
• There is risk of fire or electric
shock.
• There is risk of electric shock.
Install the panel and the cover of Do not modify or extend the
Do not install, remove, or re-
install the unit by yourself (cus-
tomer).
control box securely.
power cord.
• There is risk of fire or electric
shock.
• There is risk of fire or electric
shock.
• There is risk of fire, electric
shock, explosion or injury.
4 Room Air Conditioner
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Safety Precautions
Be cautious when unpacking
and installing the product.
For installation, always contact
the dealer or an Authorized Ser-
vice Center.
Do not install the product on a
defective installation stand.
• Shape edges could cause injury.
Be especially careful of the sharp
edges.
• There is risk of fire, electric
shock, explosion, or injury.
• It may cause injury, accident, or
damage to the product.
Be sure the installation area
does not deteriorate with age.
Install the indoor unit on the
wall where the height from the
floors more then 8ft(2.4m)
Do not handle the pipe by your-
self(customer)
• If the base collapses, the air con-
ditioner could fall with it, causing
property damage, product failure,
and personal injury.
• There are sharp moving parts
that could cause personal injury.
• High-Pressure refrigent may
cause personal injury.
8ft(2.4m)
➔ Operation
Use a dedicated outlet for this
appliance.
Grasp the plug to remove the
cord from the outlet. Do not
touch it with wet hands.
Do not allow water to run into
electric part.
• There is risk of fire or electric
shock.
• There is risk of fire or electric
shock.
• There is risk of fire, failure of the
product, and/or electric shock.
Service Manual 5
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Safety Precautions
Do not place a heater or other
appliances near the power
cable.
Do not let the air conditioner run Do not store of use flammable
for a long time when the humidi- gas or combustibles near the air
ty is very high and a door or a
window is left open.
conditioner.
•
There is risk of fire, failure of the
product, and/or electric shock.
• Moisture may condense and wet
or damage furnishings.
• There is risk of fire or product fail-
ure.
Do not use the product in a
tightly closed space for a long
time.
When flammable gas leaks, turn off
the gas and open a window for venti-
lation before turning the product on.
Do not use the telephone or turn
switches on or off.
Unplug the unit if strange
sounds odors or smoke comes
from it.
• Oxygen deficiency could occur.
• Some ventilation by opeing win-
dow is necessary for the fresh air.
• There is risk of explosion or fire.
•
There is risk of fireproduct failure
and/or electric shock.
Stop operation and close any
window in storm or hurricane.
before the hurricane arrives.
Do not open the inlet grill of the
product during operation. (Do
not touch the electrostatic filter,
if the unit is so equipped.)
When the product is soaked
(flooded or submerged), contact
an Authorized Service Center.
• There is risk of property damage, • There is risk of physical injury,
• There is risk of electrical shock.
failure of product, or electric
shock.
electric shock, or product.
6 Room Air Conditioner
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Safety Precautions
Ventilate the product from time
to time when operating it togeth- performing cleaning or mainte-
er with a stove, etc.
Unplug the appliance before
When the product is not be used
for a long time disconnect the
power supply plug or turn off
the breaker.
nance.
• There is risk of fire or electrical
shock.
• There is risk of electric shock.
• There is risk of product damage
or failure, or unintended opera-
tion.
➔ Installation
Take care to ensure that nobody
could step on or fall onto the
outdoor unit.
Do not insert hands or other
objects through the air inlet or
outlet while the air conditioner
is plugged in.
Always check for gas(refriger-
ant) leakage after installation or
repair of product.
• There could result in personal
injury and product damage.
• There are sharp and moving
parts that could cause personal
injury.
• Low refrigerant levels may cause
product failure.
Install the drain hose to ensure
that water is drained away prop-
erly.
Keep level even when installing
the product.
Do not install the product where
the noise or hot air from the out-
door unit could damage the
neighborhoods.
• A bad connection may cause
water leakage.
• To avoid vibration or water leak-
age.
• It may cause a problem for your
neighbors.
90˚
Service Manual 7
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Safety Precautions
➔ Operation
Use two or more people to lift
and transport the air conditioner it will be exposed to sea wind
(salt spray) directly.
Do not install the product where
Do not direct airflow at room
occupants.
• Avoid personal injury.
• It may cause corrosion in the
product. Corrosion, particularly
on the condenser and evaporator
fins, could cause product mal-
function or inefficient operation.
• This could damage your health.
Do not use the product for special Do not block the inlet or outlet
Use a soft cloth to clean.
Do not use harsh detergents,
solvents, etc.
purposes, such as preserving
foods, works of art, etc. It is a
consumer air conditioner, not a
precision refrigeration system.
of air flow.
• There is risk of damage or loss of • It may cause product failure.
property.
• There is risk of fire, electric shock
or damage to the plastic parts of
the product.
Do not touch the metal parts of
the product when removing the
air filter. They are very sharp!
Do not step on or put anything
on the product. (outdoor unit)
Always insert the filter securely.
Clean the filter every two weeks
or more often if necessary.
• There is risk of personal injury.
• There is risk of personal injury
• A dirty filter reduces the efficien-
and failure of product.
cy of the air conditioner and
8 Room Air Conditioner
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Safety Precautions
Do not drink the water drained
from the unit.
Use a firm stool or ladder when
cleaning or maintaining the air
conditioner.
Replace all the batteries in the
remote.
• Be careful and avoid personal
• There is risk of fire or explosion.
• It is not sanitary and could cause
injury.
serious health issues.
➔ Disuse
Do not recharge or disassemble the batteries. Do
not dispose of batteries in a fire.
If the liquid from the batteries gets onto your skin
or clothes, wash it well with clean water. Do not
use the remote if the batteries have leaked.
• They may burn or explode.
• The chemicals in batteries could cause burns or oth-
er health hazards.
Service Manual 9
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Functions
Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
• Room temperature sensor. (THERMISTOR)
Room temperature control
• Maintains the room temperature in accordance with the Setting Temp.
Starting Current Control
• Indoor fan is delayed for 5 sec at the starting.
Time Delay Safety Control
• Restarting is inhibited for approx. 3 minutes.
Indoor Fan Speed Control
• High, Med, Low, CHAOS
Operation indication Lamps (LED)
Signal Receptor
Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)
Operation Indication Lamps
On/Off
Sleep Mode
Timer
: Lights up during the system operation.
: Lights up during Sleep Mode Auto operation.
: Lights up during Timer operation.
Defrost Mode
: Lights up during Defrost Mode or
Hot Start operation.(Heat pump model only)
Outdoor unit operation : Lights up during outdoor unit operation.
(Cooling model only)
Operation indication lamps
Soft Dry Operation Mode
• Intermittent operation of fan at low speed.
Sleep Mode Auto Control
• The fan is switched to low(Cooling), med(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
Defrost(Deice) control (Heating)
Natural Air Control by CHAOS Logic
• Both the indoor and outdoor fan stops dur-
ing defrosting.
• The fan is switched to intermittent or irregular operation
•
The fan speed is automatically switched from high to low speed.
Hot-start Control (Heating)
Airflow Direction Control
• The indoor fan stops until the
evaporator pipe temperature will be reached
at 28°C.
• The louver can be set at the desired position or swing
up and down automatically.
10 Room Air Conditioner
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Functions
Remote Control
Operation ON/OFF
Operation Mode Selection
Cooling Operation Mode.(
)
Auto Operation Mode.(
)
(Cooling
model only)
(Heating
model only)
Healthy Dehumidification Operation Mode.
(
)
Heating Operation Mode.(
)
Fan Speed Selection
(Low)
(Med)
(High)
Room, Temperature Checking
: (Low:11°C
High:39°C)
Temperature Setting
LOW
HIGH
TEMPERATURE
Down to 18°C
Up to 30°C
Down to 16°C
Up to 30°C
Cooling
Heating
JET COOL
Setting the Time or Timer
Timer Selection
: OFF, ON, OFF
ON
ON
OFF
Timer Setting
SET
Timer Cancel
CANCEL
: Cancel Sleep Mode, Timer ON or Timer OFF
Sleep Operation
: 1, 2, 3, 4, 5, 6, 7, Off Timer
Airflow Direction Control
Air Circulation
: Fan Operates without cooling or heating.
°C To °F Swiching Button
°C/°F
2nd F
Reset
Service Manual 11
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Product References
Product References
Items
Unit
ø, V, Hz
BTU/h
W
LA*181CNW(AS-C183VML3)/LA180CP* (AS-C183VML3)
Power Supply
Cooling Capacity
Input
1, 208/230, 60
17 800/18 000
2,000/2,000
9.8/8.9
Running Current
COMP. Locked Rotor AMP.
S.E.E.R
Air Circulation
Moisture Removal
Noise Level
A
A
25*2
13
13(460)
2.5(5.3)
44
40
36
55
m3/min(cfm)
l/h(pts/hr)
dB(A) 3
dB(A) 3
dB(A) 3
dB(A) 3
Indoor, High
Med
Low
Outdoor, Max
Temperature Control
Air Deflection
Steps, Fan/Cool
(Sound
Pressure, 1m)
Features
Thermistor
4-way
3/4
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remocon Type
Setting Temperature Range, Cooling Mode
Temperature Increment
Auto Operation(electronic control)
Self Diagnosis
Auto
Auto
Wireless LCD
64~86°F(18~30°C)
2°F(1°C)
Yes
Yes
Timer
Sleep Operation
24hr, On/Off
Yes
Healthy Dehumidification Mode
Yes
Restart Delay
Refrigerant(R-410A) Charge
Power cord
minutes
g(oz)
3
900(31.8)
14:3*2.5
20
18:4*0.75
6.35(1/4)
12.7(1/2)
7.5(25)
AWG #: P*mm2
A
Fuse or breaker Capacity
Connecting Cable
Connecting Tube
(ø. Socket Flare)
AWG #: P*mm2
mm(in)
mm(in)
m(ft)
Liquid Side
Gas Side
Length, std
Additional Drain Hose(Outer Dia.)
mm(in)
mm
in
mm
in
kg(lbs)
kg(lbs)
kg(lbs)
kg(lbs)
19(3/4)
Dimensions
(WxHxD)
Indoor
928*522*147
361/2*2019/32*525/32
870*655*320
341/4*2513/16*125/8
17(37.5)
68(149.9)
19(41.9)
71(156.5)
Outdoor
Net Weight
Indoor
Outdoor
Indoor
Gross Weight
Outdoor
NOTE: Please refer to Label Quality on the product since this specification may be changed for improving
performance
12 Room Air Conditioner
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Dimensions
Dimensions
Indoor Unit
928
147
Pipe Hole
Fix Hole
MODEL
Indoor Unit
DIM
W
Unit
mm(inch)
928(36.5)
522(20.6)
147(5.8)
H
D
mm(inch)
mm(inch)
Service Manual 13
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Dimensions
Outdoor Unit
W
Gas side
3-way valve
Liquid side
2-way valve
L6
L5
L7
L8
MODEL
DIM
OUTDOOR UNIT
W
H
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
mm(inch)
870(34.3)
655(25.8)
320(12.6)
370(14.6)
25(1.0)
D
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
630(24.8)
25(1.0)
546(21.5)
162(6.4)
162(6.4)
54(2.1)
74.5(2.9)
79(3.1)
14 Room Air Conditioner
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Refrigeration Cycle Diagram
Refrigeration Cycle Diagram
Cooling Only Models
INDOOR UNIT
OUTDOOR UNIT
LIQUID SIDE
CAPILLARY TUBE
HEAT
EXCHANGER
(EVAPORATOR)
HEAT
EXCHANGER
(CONDENSER)
COMPRESSOR
GAS SIDE
Pipe size(Diameter:ø)
Piping length
Elevation
Rated
5m(16ft)
MODEL
Gas
1/2"
Liquid
1/4"
Rated
7.5m(24.6ft)
Max
Max
18K
(Cooling Only)
30m(98.4ft)
15m(49ft)
For installation over rated, *a proper quantity of refrigerant should be added for each meter.
Ex) 18K: When installed at a distance of 30m, 450g of
a proper quantity of refrigerant
18K 20g
refrigerant should be added.
(30-7.5) x 20g = 450g
Service Manual 15
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Wiring Diagram
Wiring Diagram
Indoor Unit
18K (Cooling Only Models)
Outdoor Unit
16 Room Air Conditioner
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Operation Details
Operation Details
MAIN UNIT FUNCTION
• DISPLAY
1) C/O Model
Operation Indicator
• ON while in appliance operation, OFF while in appliance pause.
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.
Timer Indicator
• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Comp. Running Incidator
• While in appliance operation, ON while in outdoor unit compressor running, OFF while in compressor off.
2) H/P Model
Operation Indicator
• ON while in appliance operation, OFF while in appliance pause.
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.
Timer Indicator
• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Defrost Indicator
• OFF except when hot start during heating mode operation or while in defrost control.
➔ Cooling Mode Operation
• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan
stop.
• When it reaches 0.5°C above the setting temp, they start to operate again.
Compressor ON Temp
Compressor OFF Temp
➔➔Setting Temp+0.5°C
➔ Setting Temp-0.5°C
• While in compressor running, operating with the airflow speed set by the remote control. While in compressor
not running, operating with the low airflow speed regardless of the setting.
➔ Healthy Dehumidification Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C ≤ Intake Air Temp
➔➔ 25°C
24°C ≤ Intake Intake Air Temp<26°C
18°C ≤ Intake Intake Air Temp<24°C
Intake Air Temp<18°C
➔➔ Intake Air Temp-1°C
➔➔ Intake Air Temp-0.5°C
➔➔ 18°C
Service Manual 17
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Operation Details
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica-
tion operation and 4-min compressor off repeat.
Compressor ON Temp.
➔ Setting Temp+0.5°C
Compressor OFF Temp. ➔ Setting Temp-0.5°C
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
➔ Heating Mode Operation
• When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below
the setting temp, the compressor is turned on.
Compressor ON Temp.
➔ Setting Temp.
Compressor OFF Temp. ➔ Setting Temp.+3°C
• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it
operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it oper-
ates with Super-Low(while in sleep mode, with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it
operates with the low airflow speed.
• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the
outdoor fan is turned on/off according to the indoor pipe temp.
• While in defrost control, both of the indoor and outdoor fans are turned off.
➔ Defrost Control
• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,
reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.
• After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time
of defrost control are determined according to the following conditions.
1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is com-
pared with the present indoor pipe temperature to get the difference of the indoor pipe temperatures (=the
maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether
to carry out defrost control or not is determined.
2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that
moment, the defrost control time is determined.
3) When the determined time of defrost control is below 7 min, heating mode operation continues without carry-
ing out defrost control. According to the procedure stated above, the determination is made again. When the
defrost control time is 7 min or longer, defrost control is then carried out.
• While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present
temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of the
indoor pipe ? the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost con-
trol is completed and heating mode operation is carried out.
• While in defrost control, if the defrost time determined before the start of defrost control is completed, defrost
control stops and heating mode operation is carried out regardless of the above condition.
• When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of
the defrost conditions above.
• While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off.
18 Room Air Conditioner
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Operation Details
➔➔Fuzzy Operation (C/O Model)
• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting
temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
Compressor ON Temp
Compressor OFF Temp
➔ Setting Temp + 0.5°C
➔ Setting Temp + 0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C ≤ Intake Air Temp
➔ 25°C
24°C ≤ Intake Air Temp < 26°C
22°C ≤ Intake Air Temp < 24°C
18°C ≤ Intake Air Temp < 22°C
Intake Air Temp<18°C
➔ Intake Air Temp + 1°C
➔ Intake Air Temp + 0.5°C
➔ Intake Air Temp
➔➔18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the
temperature.
➔ Fuzzy Operation (H/P Model)
• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air
temp at that moment as follows.
24°C ≤ Inatake Air Temp
21°C ≤ Inatake Air Temp<24°C
Inatake Air Temp<21°C
➔ Fuzzy Operation for Cooling
➔ Fuzzy Operation for Dehumidification
➔ Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10
sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor
is turned on.
Compressor ON Temp
Compressor OFF Temp
➔ Setting Temp +0.5°C
➔ Setting Temp + 0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C≤ Intake Air Temp
➔ 25°C
24°C≤ Intake Air Temp<26°C
22°C≤ Intake Air Temp<24°C
18°C≤ Intake Air Temp<22°C
Intake Air Temp<18°C
➔ Intake Air Temp + 1°C
➔ Intake Air Temp + 0.5°C
➔ Intake Air Temp
➔ 18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the tem-
perature.
Service Manual 19
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Operation Details
2) Fuzzy Operation for Dehumidification
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor
is turned on.
Compressor ON Temp
Compressor OFF Temp
➔ Setting Temp + 0.5°C
➔ Setting Temp+0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C ≤ Intake Air Temp
➔ 25°C
24°C ≤ Intake Air Temp<26°C
22°C ≤ Intake Air Temp<24°C
18°C ≤ Intake Air Temp<22°C
Intake Air Temp<18°C
➔ Intake Air Temp+1°C
➔➔ Intake Air Temp+0.5°C
➔ Intake Air Temp
➔ 18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in
dehumidification operation.
3) Fuzzy Operation for Heating
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above
the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.
Compressor ON Temp
Compressor OFF Temp
➔ Setting Temp
➔ Setting Temp + 3°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
20°C≤Intake Air Temp
Intake Air Temp<20°C
➔ Intake Air Temp + 0.5°C
➔ 20°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the
intake air temperature and the setting temperature.
➔➔Airflow Speed Selection
• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow
speed selection key on the remote control.
➔ On-Timer Operation
• When the set time is reached after the time is input by the remote control, the appliance starts to operate.
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
• If the appliance is operating at the time set by the timer, the operation continues.
20 Room Air Conditioner
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Operation Details
➔➔Off-Timer Operation
• When the set time is reached after the time is input by the remote control, the appliance stops operating.
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
• If the appliance is on pause at the time set by the timer, the pause continues.
➔➔Off-Timer ➔ On-Timer Operation
• When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is
carried out according to the set time.
➔➔Sleep Timer Operation
• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appli-
ance operation, the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature
increases by 1°C. After another 30 min elapse, it increases by 1°C again.
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to the
low.
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to
the medium.
➔➔Chaos Swing Mode
• By the Chaos Swing key input, the louvers vane automatically operate with the Chaos Swing or they are fixed
to the desired direction.
• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.
< Cooling Mode >
< Heating Mode >
CLOSED
CLOSED
OPEN
OPEN
➔➔Jet Cool Mode Operation (C/O Model)
• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• During the JET COOL function at any moment, the A/C starts to blow the cool air with side louvers closed at
extremely high speed for 30 minutes setting the room temp. automatically to 18°C.
Service Manual 21
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Operation Details
➔➔Jet Cool Mode Operation (H/P Model)
• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other
mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 60 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C.
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• During the JET HEAT function at any moment, the A/C starts to blow the hot air with side louvers closed at
extremely high speed for 60 minutes setting the room temp. automatically to 30°C.
➔ Forced Operation
• Operation procedures when the remote control can't be used.
• The operation will be started if the power button is pressed.
• If you want to stop operation, re-press the button.
Heat pump Model
Cooling Model
Room Temp. ≥ 24°C 21°C ≤ Room Temp. < 24°C Room Temp. < 21°C
Operating mode
Indoor FAN Speed
Setting Temperature
Cooling
High
Cooling
Healthy Dehumidification
Heating
High
High
High
22°C
22°C
23°C
24°C
• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to
indicate the forced operation.
➔ Test operation
•
During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem-
perature and resets in 18±1 minutes.
•
During test operation, if remote controller signal is received, the unit operates as remote controller sets.
If you want to use this operation, open the front panel upward and Press the power button let it be pressed for
about 3 seconds.
•
If you want to stop the operation, re-press the button.
➔ Auto restart
•
In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
➔ Remote Control Operation Mode
• When the remote control is selected by the slide switch on the main unit, the appliance operates according to
the input by the remote control.
➔ Protection of the evaporator pipe from frosting
• If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cool-
ing cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor
evaporator pipe from frosting.
• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the
outdoor fan is turned on according to the condition of the room temperature.
➔ Buzzer Sounding Operation
• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.
• When the appliance-pause key is input by the remote control, the long "beep—" sounds.
• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the
forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the
remote control signal cannot be received.
22 Room Air Conditioner
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Display Function
Display Function
1. Heating Model
2. Cooling Model
Operation Indicator
Operation Indicator
• Cooling, Soft Dry, Fan, Heating
• Cooling, Soft Dry, Fan
Sleep Timer Indicator
Sleep Timer Indicator
• Sleep Mode
• Sleep Mode
Timer Indicator
Timer Indicator
• Timer Mode
• Timer Mode
Compressor on Indicator
Defrost Indicator
• Hot-start, Defrost
Self-diagnosis Function
Error
Code
Error Display LED
(Indoor body operation LED)
Error contents
SVC check point
• Indoor room temperature
thermistor open/short
• Indoor pipe temperature
thermistor open/short.
(once)
• Indoor Thermistor
assembly check
1
3sec
3sec
3sec
Service Manual 23
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Introduction
Symbols used in this Manual
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Features
NEO Plasma Filter
Air Inlet
Front Panel
Air Filter
Signal Receptor
Air Discharge
Air Intake Vents
Power Cord
Piping
Connecting Wires
Air Outlet Vents
Base Plate
Drain Hose
24 Room Air Conditioner
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Installation
Installation
Read carefully, and then follow step by step.
Installation Parts
Installation plate
Type "A" screw and plastic anchor
Remote control holder
Type "B" screw
Installation Tools
Figure
Name
Figure
Name
Screw driver
Ohmmeter
Electric drill
Hexagonal wrench
Measuring tape, Knife
Hole core drill
Ammeter
Gas-leak detector
Thermometer,
Horizontal meter
Spanner
Torque wrench
Flaring tool set
Service Manual 25
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Installation
Installation Map
NOTICE
Installation parts you should purchase.
More than
3.9"(10cm)
Sleeve
Bushing-Sleeve
Putty(Gum Type Sealer)
More than
19.6"(50cm)
(Left and right
are identical)
Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.
Vinyl tape (Wide)
• To carry out the drainage
test, remove the air filters
and pour water into the heat
exchanger.
Saddle
• Apply after carrying out a
drainage test.
More than
24"(60cm)
More than
12"(30cm)
More than
12"(330cm)
Gas side piping
(Optional Part)
(Optional Part)
Liquid side piping
Additional drain pipe
More than
28"(70cm)
Vinyl tape (Narrow)
Connecting cable
(Optional Part)
26 Room Air Conditioner
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Installation
Confirm The Refrigerant
1. Check the quality label on the indoor and outdoor unit.
2. Make certain that the refrigerant is R-410A.
NOTICE
THIS PRODUCT CONTAINS R-410A REFRIGERANT
1) Different compressor oil
- R-410A(Polyol ester) / R-22(Mineral).
- Do not mix the existing mineral oil.
- Do not apply used pipe, tools and gauges covered with the existing mineral oil.
2) Absorption of moisture
-Compressor’s oil has the high absorption rate of moisture.
3) Composition
- R-410A(R32:R125=50:50wt%).
NOTE: Never mix with other refrigerants
Example : Split type 12,000 Btu/h
120
100
93
100
80
60
40
20
89
84
76
0
R-410A
R-22
100%
70%
50%
30%
0%
0%
30%
50%
70% 100%
4) High pressure.
- 1.6 times higher than R-22.
- High Pressure refrigerant may cause personal injury.
Boiling Pt.(°C)
Vapor pressure(25°C)(kg f/cnf)
Vapor density(25°C)(kg/m2)
R-410A
R-22
-51.4
-40.8
15.9
9.6
64
44.4
Do not handle the pipe by yourself (customer) High-pressure refrigerant may cause personal injury.
- manifold gauge ,charging and any piping tools must be dedicated to R-410A systems.
Service Manual 27
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Installation
Installation of indoor, Outdoor unit
Read completely, then follow step by step.
1) Select the best location
➔ Rooftop Installations:
1. Indoor unit
If the outdoor unit is installed on a roof structure, be
sure to level the unit. Ensure the roof structure and
anchoring method are adequate for the unit loca-
tion. Consult local codes regarding rooftop mount-
ing.
➔ Do not have any heat or steam near the unit.
➔ Select a place where there are no obstacles in front
of the unit.
➔ Make sure that condensation drainage can be con-
veniently routed away.
➔ Do not install near a doorway.
2) Piping length and elevation
➔ Ensure that the space around the left and right of
the unit is more than 50cm(19.7”). The unit should
be installed as high on the wall as possible, allowing
a minimum of 10cm(3.9”) from ceiling.
➔ Use a stud finder to locate studs to prevent unnec-
essary damage to the wall.
Additional
Refrigerant
(g/m)
Standard
Max.
Max.
Pipe Size
Capacity
(Btu/h)
Length Elevation length
GAS
1/2"
LIQUID
1/4"
(m)
7.5
B
(m)
15
A (m)
30
18k
20
(24.6ft) (49.2ft) (98.4ft)
More than
10cm(3.9")
Outdoor unit
Indoor unit
More than
50cm(19.7")
A
A
More than
More than
50cm(19.7")
2m(6.6ft)
Indoor unit
B
B
Outdoor unit
CAUTION
Install the indoor unit on the wall where the height from the floors
more than 2m(6.6ft).
Outdoor unit
2. Outdoor unit
➔ If an awning is built over the unit to prevent direct
sunlight or rain exposure, make sure that heat radia-
tion from the condenser is not restricted.
➔ Ensure that the space around the back and sides is
more than 30cm(12") .
A
Oil trap
Indoor unit
The front of the unit should have more than
70cm(27.5") of space.
B
➔ Do not place animals and plants in the path of the
warm air.
➔ Take the air conditioner weight into account and
select a place where noise and vibration are mini-
mum.
In case more than 5m(16.4ft)
➔ Select a place so that the warm air and noise from
the air conditioner do not disturb neighbors.
CAUTION
• Capacity is based on standard length and maximum allowance
length is on the basis of reliability.
• Oil trap should be installed every 5~7 meters(16.4~23ft).
More than 60cm(24")
More than 30cm(12")
More than 70cm(28")
More than 30cm(12")
More
than 60cm(24")
28 Room Air Conditioner
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Installation
3) Preparing work for Installation
1. Open panel front
2. Cover pipe and cover side remove
➔ First,Pull the grille bottom, then remove screws(2
pieces), and close grille bottom again.
➔ The moment of lifting the both lower parts of panel
front, you can hear sound this panel came out, In
this time panel front is separated
➔ Remove two screws(for fixing cover pipe)
➔ Pull up the cover side of desired connecting direc-
tion, then cover side is separated.
➔ In case connecting direction is left or right, path
through the hole of cover side.
➔ After pull down this panel a bit, and separate con-
necting wire with product.
CAUTION
After removing the pipe hole, cut the burr for safety.
Pipe hole
Side cover
When connecting pipe path through rear wall, don’t
remove the hole.
3. Drain hose junction
➔ Remove the rubber stopple of desired drain direc-
tion.
➔ As the following picture, Insert drain hose in the
handle of drain pan, and join drain hose and con-
necting hose.
Panel Front
Connector
Only one
Adhesive
desiring direction
Connecting
part
Drain
hose
rubber cap
Service Manual 29
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Installation
4) How to fix installation plate
5) Preparing work for installation
The wall you select should be strong and solid enough
to prevent vibration
1. Drill a hole in the wall
• Drill the piping hole with a ø50mm hole core drill.
Drill the piping hole at either the right or the left with
the hole slightly slanted to the outdoor side.
Mount the installation plate on the wall with
type "A" screws. If mounting the unit on a concrete
wall, use anchor bolts.
A
WALL
➔ Mount the installation plate horizontally by aligning
the centerline using a level.
Indoor
Outdoor
Installation Plate
Type "A" screw
Measure the wall and mark the centerline. It is also
B
important to use caution concerning the location of
the installation plate-routing of the wiring to power
outlets is through the walls typically. Drilling the hole
through the wall for piping connections must be
done safely.
60mm
(2.4")
60mm
(2.4")
Ø 70mm
(2.8")
Ø 70mm
(2.8")
30 Room Air Conditioner
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Installation
Flaring Work and Connection of Piping
1) Flaring work
• Carry out flaring work using flaring tool as shown
below.
Main cause for refrigerant leakage is due to defect in
the flaring work. Carry out correct flaring work using the
following procedure.
Handle
Yoke
Cone
Bar
Bar
1. Cut the pipes and the cable.
•
•
•
•
Use the piping kit accessory or pipes purchased locally.
Measure the distance between the indoor and the outdoor unit.
Cut the pipes a little longer than the measured distance.
Cut the cable 1.5m longer than the pipe length.
Copper pipe
Clamp handle
Copper
pipe
Red arrow mark
Slanted Uneven Rough
90°
5. Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the flared sec-
tion and re-flare it.
2. Burr removal
• Completely remove all burrs from the cut cross sec-
Smooth all round
tion of pipe/tube.
Inside is shiny without scratches
• Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid drop-
= Improper flaring =
ping burrs into the tubing.
Pipe
Reamer
Inclined Surface Cracked Uneven
damaged
thickness
Even length
all round
Point down
3. Putting nut on
2) Connection of piping Indoor
• Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having completed
burr removal.
(not possible to put them on after flaring work)
Flare nut
• Preparing the indoor unit's piping and drain hose for
installation through the wall.
1. Route the indoor tubing and the drain hose in the
direction of rear left or right.
Copper tube
4. Flaring work
• Firmly hold copper pipe in a die in the dimension
shown in the table above.
Outside diameter
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
A
Drain hose
inch
1/4
3/8
1/2
5/8
mm
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
Service Manual 31
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Installation
2. Tape the tubing, drain hose, and the connecting
cable. Be sure that the drain hose is located at the
lowest side of the bundle. Locating at the upper side
can cause drain pan to overflow inside the unit.
Outside diameter
Torque
.
mm
inch
1/4
3.8
1/2
5/8
3/4
Kgf cm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
180~250
340~420
350~660
630~820
990~1210
• When extending the drain hose at the indoor unit,
install the drain pipe.
Loop
Gas side piping
Connecting
cable
Drain pipe
Liquid side piping
Drain hose
NOTE: If the drain hose is routed inside the room,
insulate the hose with an insulation material* so that
dripping from "sweating"(condensation) will not damage
furniture or floors.
Indoor unit drain hose
Vinyl tape(narrow)
Adhesive
*Foamed polyethylene or equivalent is recommended.
5. Wrap the insulation material around the connecting
portion.
• Overlap the connection pipe insulation material and
the indoor unit pipe insulation material. Bind them
together with vinyl tape so that there is no gap.
3. Indoor unit installation
• Hook the indoor unit onto the upper portion of the
installation plate.(Engage the two hooks of the rear
top of the indoor unit with the upper edge of the instal-
lation plate.) Ensure that the hooks are properly seat-
ed on the installation plate by moving it left and right.
Plastic bands
Insulation material
Connecting
cable
• Wrap the area which accommodates the rear piping
housing section with vinyl tape.
Drain hose
Indoor
unit pipe
Connection
pipe
4. Connecting the pipings to the indoor unit and drain
hose to drain pipe.
Vinyl tape
(wide)
Wrap with vinyl tape
• Align the center of the pipes and sufficiently tighten
the flare nut by hand.
Connecting cable
Pipe
Vinyl tape(narrow)
Indoor unit tubing
Flare nut Pipes
• Bundle the piping and drain hose together by wrap-
ping them with vinyl tape for enough to cover where
they fit into the rear piping housing section.
Wrap with vinyl tape
• Tighten the flare nut with a wrench.
Open-end wrench (fixed)
Flare nut
Pipe
Connection pipe
Wrench
Indoor unit tubing
Vinyl tape(wide)
Drain hose
32 Room Air Conditioner
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Installation
3) Connection of the pipes-Outdoor
CAUTION
1. Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Installation Information (For right piping)
• Good case
For right piping. Follow the instruction below.
➔ Press on the upper side of clamp and
unfold the tubing to downward slowly.
2. Finally, tighten the flare nut with torque wrench
until the wrench clicks.
• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow on
the wrench.
Outside diameter
mm
Torque
.
inch
1/4
3/8
1/2
5/8
3/4
Kgf cm
Ø6.35
Ø9.52
180~250
340~420
550~660
630~820
990~1210
Ø12.7
Ø15.88
Ø19.05
• Bad case
Outdoor unit
Liquid side piping
(Smaller diameter)
➔ Following bending type from left to right could cause
problem of pipe damage.
Gas side
piping
(Bigger
diameter)
Torque wrench
Service Manual 33
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Installation
Connecting The Cable Between Indoor Unit and Outdoor Unit
1) Connection of the cable
1. Remove the cover control from the unit
by loosening the 3 screws.
Wiring Diagram
Connecting cable(Low voltage)
b
2. Dismount caps on the conduit panel.
Indoor Unit
Outdoor Unit
3. Temporarily mount the conduit tubes on
the conduit panel.
Terminal
(4P)
Terminal
(6P)
1
2
3
4
1
2
3
4
4. Properly connect both the power supply
and low voltage lines to the
corresponding terminals on the terminal
block.
Power supply
a
5
L1*
6
L2
To
branch
circuit
G
5. Ground the unit in accordance with local
codes.
Ground
L1 is neutral for 115V models.
*
6. Be sure to size each wire allowing
several inches longer than the required
length for wiring.
7. Use lock nuts to secure the conduit
tubes.
NOTE
1.
shows field wiring.
2. Separately wire the high and low voltage line.
3. Use heat-proof electrical wiring capable of
withstanding temperatures up to 167°F.
NOTE
Connector trade size for this unit is 1/2".
Refer to "How to connect wiring to the
terminals" for instructions on connecting
depending on the wire type you are using.
4. Use outdoor and waterproof connection cable
rated more than 300V for the connection between
indoor and outdoor unit.
(For example, Type SJO-WA)
WARNING
• Be sure to comply with local codes while
running the wire from the indoor unit to
the outdoor unit(size of wire and wiring
method, etc).
Outdoor unit
Terminal block
• Every wire must be connected firmly.
• No wire should be allowed to touch
refrigerant tubing, the compressor or any
moving parts.
Over 5mm
(2")
Conduit panel
Connecting
cable
Power Supply
AWG(MIN.)
Fuse or breaker
Capacity
Power supply
cord
Model
Power source
ⓐ
ⓑ
Cover control
18K 1ø, 208/230V 14
18
20A
34 Room Air Conditioner
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Installation
2) Connection method of the connecting
cable(Example)
(1) Dismount two-caps on the conduit panel.
(2) Make a hole appropriate for the passage of
connection cable through on cap by tool.
(for low voltage line)
(3) Pass the connecting cable through the hole.
(4) Properly connect the cable on the terminal block.
(5) Fix the connection cable with clamp cord
provided on the unit not to have strain at the
terminal when the connection cable is pulled
outside up to a 35 pound weight.
(6) Wind the vinyl tape round the connecting cable
for sealing between the surface of the
connection cable and cap.
Terminal
block
Clamp cord
Cap(Reuse)
G
Lock nut
Hole
Cap
(Remove)
(7) Mount the taped part of cable on the cap.
(8) Finally, mount the holed cap with the
wound cable on the conduit panel.
(for low voltage line)
Taping
(for sealing)
Power supply line
(1ø, 115V, 208/230V)
WARNING
Loose wiring may cause the terminal to
overheat or result in unit malfunction. A fire
hazard may also exist. Therefore, be sure all
wiring is tightly connected.
Low voltage line
(connecting cable)
Conduit panel
When connecting each power wire to the
corresponding terminal, follow instructions "How to
connect wiring to the terminals" and fasten the wire
tightly with the fixing screw of the terminal plate.
Solid wire
Loop
How to connect wiring to the terminals
➔ For solid core wiring (or F-cable)
(1) Cut the wire end with a wire cutter of wire-
cutting pliers, then strip the insulation to expose
the solid wire about 25mm(15/16")
Insulation
(2) Using a screwdriver, remove the terminal
screw(s) on the terminal plate.
(3) Using pliers, bend the solid wire to from a loop
suitable for the terminal screw.
Strand wire
(4) Shape the loop wire properly, place it on the
terminal plater and tighten securely with the
terminal screw using a screwdriver.
Round
terminal
➔ For strand wiring
(1) Cut the wire end with a wire cutter or wire-
cutting pliers, then strip the insulation to expose
the strand wiring about 10mm(3/8").
(2) Using a screwdriver, remove the terminal
screw(s) on the terminal plate.
(3) Using a round terminal fastener or pliers,
securely clamp each stripped wire end with a
round terminal.
Screw with
special washer
Screw with
Round terminal
Terminal plate
special washer
Round terminal
Wire
(4) Position the round terminal wire, and replace
and tighten the terminal screw using a
screwdriver.
Wire
Service Manual 35
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Installation
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power circuit specifically for the air conditioner. As for the
method of wiring, be guided by the circuit diagram posted on the inside of control cover.
2) The screw which fasten the wiring in the casing of electrical fittings are liable to come
loose from vibrations to which the unit is subjected during the course of transportation.
Check them and make sure that they are all tightly fastened. (If they are loose, it could
cause burn-out of the wires.)
3) Specification of power source.
4) Confirm that electrical capacity is sufficient.
5) Confirm that the starting voltage is maintained at more than 90 percent of the rated volt-
age marked on the name plate.
6) Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.
7) Always install an GFCI circuit breaker in a wet or moist area.
8) The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the contact point, open fuse, disturbance of
the normal function of the overload.
9) The means for disconnection from a power supply shall be incorporated in the fixed
wiring and have an air gap contact separation of at least 3mm(0.12in) in each
active(phase) conductors.
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Installation
Checking the Drainage and forming the pipings
2) Form the piping
1) Checking the drainage
1. Form the piping by wrapping the connecting por-
tion of the indoor unit with insulation material and
secure it with two kinds of vinyl tapes.
1. To check the drainage.
➔ Pour a glass of water on the evaporator.
➔ Ensure the water flows through the drain hose of the
indoor unit without any leakage and goes out the
drain exit.
➔ If you want to connect an additional drain hose, the
end of the drain outlet should be routed above the
ground. Secure the drain hose appropriately.
2. In cases where the outdoor unit is installed below
the indoor unit perform the following.
➔ Tape the piping, drain hose and connecting cable
from down to up.
➔ Secure the tapped piping along the exterior wall
using saddle or equivalent.
Seal small openings
around pipings with a
gum type sealer.
Taping
Drain hose
Pipings
Connecting cable
Trap is required to prevent water
from entering into electrical parts.
2. Drain piping
3. In cases where the Outdoor unit is installed above
the Indoor unit perform the following.
➔ The drain hose should point downward for easy
➔ Tape the piping and connecting cable from down to
up.
drain flow.
➔ Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
➔ Fix the piping onto the wall by saddle or equivalent.
Downward slope
Seal a small opening
around the pipings
with gum type sealer.
➔ Do not make drain piping.
Trap
Accumulated
Do not raise
drain water
Tip of drain hose
dipped in water
Air
Less than
50mm gap
Water
leakage
Water
leakage
Water
leakage
Waving
Ditch
Trap
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Installation
CAUTION
CAUTION
If a power plug is not to be used, provide a circuit breaker between power source and the
unit as shown below.
Main power source
Air
Circuit Breaker
Use a circuit
breaker or time
delay fuse.
Conditioner
3) Connect the cable to the indoor unit
1. Connect the wires to the terminals on the
control board individually according to the
outdoor unit connection.
• Ensure that the color of the wires of outdoor unit
and the terminal No. are the same as those of
indoor unit respectively.
(Refer to Wiring diagram on page16.)
WARNING
• Be sure to refer to the wiring diagram label
inside the grille and carry out the correct
field wiring.
Wrong wiring can cause the unit to misoperate
to result in a fire hazard.
Connecting cable
• Check local electrical codes and any specified
wiring instructions or limitations.
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Installation
Air Purging
• Do a leak test of all joints of the tubing(both indoor
and outdoor) and both gas and liquid side service
valves.
Bubbles indicate a leak. Be sure to wipe off the soap
with a clean cloth.
• After the system is found to be free of leaks, relieve
the nitrogen pressure by loosening the charge hose
connector at the nitrogen cylinder. When the system
pressure is reduced to normal, disconnect the hose
from the cylinder.
1) Air purging
Air and moisture remaining in the refrigerant system
have undesirable effects as indicated below.
• Pressure in the system rises.
• Operating current rises.
• Cooling(or heating) efficiency drops.
• Moisture in the refrigerant circuit may freeze and block
capillary tubing.
• Water may lead to corrosion of parts in the refrigera-
tion system.
Therefore, the indoor unit and tubing between the
indoor and outdoor unit must be leak tested and evacu-
ated to remove any noncondensables and moisture
from the system.
Indoor unit
2) Air purging with vacuum pump
1. Preparation
• Check that each tube(both liquid and gas side tubes)
between the indoor and outdoor units have been prop-
erly connected and all wiring for the test run has been
completed. Remove the service valve caps from both
the gas and the liquid side on the outdoor unit. Note
that both the liquid and the gas side service valves on
the outdoor unit are kept closed at this stage.
Outdoor unit
2. Leak test
Manifold valve
Pressure
• Connect the manifold valve(with pressure gauges)
and dry nitrogen gas cylinder to this service port with
charge hoses.
Lo
Hi
gauge
CAUTION
Be sure to use a manifold valve for air purging. If it is
not available, use a stop valve for this purpose. The
"Hi" knob of the manifold valve must always be kept
close.
Charge hose
• Pressurize the system to no more than 150 P.S.I.G.
with dry nitrogen gas and close the cylinder valve
when the gauge reading reached 150 P.S.I.G. Next,
test for leaks with liquid soap.
Nitrogen gas
cylinder(in vertical
standing position)
CAUTION
To avoid nitrogen entering the refrigerant system in a
liquid state, the top of the cylinder must be higher than
its bottom when you pressurize the system. Usually,
the cylinder is used in a vertical standing position.
Service Manual 39
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Installation
Soap water method
Gas side
(1) Remove the caps from the 2-way and 3-way
valves.
(2) Remove the service-port cap from the 3-way valve.
(3) To open the 2-way valve turn the valve stem coun-
terclockwise approximately 90°, wait for about 2~3
sec, and close it.
Liquid side
3-way valve
(Close)
(4) Apply a soap water or a liquid neutral detergent on
the indoor unit connection or outdoor unit connec-
tions by a soft brush to check for leakage of the
connecting points of the piping.
2-way valve
(Open)
(5) If bubbles come out, the pipes have leakage.
Cap
Hexagonal wrench
3. Evacuation
• Connect the charge hose end described in the pre-
ceding steps to the vacuum pump to evacuate the tub-
ing and indoor unit.
Confirm the "Lo" knob of the manifold valve is open.
Then, run the vacuum pump.
Indoor unit
The operation time for evacuation varies with tubing
length and capacity of the pump. The following table
shows the time required for evacuation.
Required time for evacuation when 30 gal/h vacuum pump is
used
if tubing length is longer than 10m
(33 ft)
If tubing length is less than 10m
(33 ft)
Outdoor unit
10 min. or more
15 min. or more
• When the desired vacuum is reached, close the "Lo"
knob of the manifold valve and stop the vacuum
pump.
4. Finishing the job
• With a service valve wrench, turn the valve stem of
liquid side valve counter-clockwise to fully open the
valve.
Manifold valve
• Turn the valve stem of gas side valve counter-clock-
wise to fully open the valve.
Pressure
gauge
Lo
Hi
• Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
Open
Close
• Replace the flare nut and its bonnet on the gas side
service port and fasten the flare nut securely with an
adjustable wrench. This process is very important to
prevent leakage from the system.
• Replace the valve caps at both gas and liquid side
service valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
Vacuum pump
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Installation
Panel Front Assembly
1. First, Check the side cover assembly exactly, Fix
power cord in the bottom groove of cover side
left.
2. Assemble connecting lead wire with controller
and first fix the upper part of panel front, then
match the lower part of panel front
Panel Front
Connector
3. Drive three screws.
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Installation
Test Running
1. Check that all tubing and wiring have been properly
Intake temperature
connected.
Discharge air
2. Check that the gas and liquid side service valves are
fully open.
1. Prepare remote control
1. Remove the battery cover
by pulling it according to the
arrow direction.
2. Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.
3. Reattach the cover by
pushing it back into position.
Discharge
temperature
4. For reference; the gas side pressure of optimum con-
dition is as below.(Cooling)
Outside ambient
TEMP.
The pressure of the gas side
service valve.
Refrigerant
R-410A
NOTE:
35°C (95°F)
8.5~9.5kg/cm2G(120~135 P.S.I.G)
• Use 2 AAA(1.5volt) batteries. Do not use recharge-
able batteries.
• Remove the batteries from the remote control if the
system is not going to be used for a long time.
NOTE: If the actual pressure is higher than shown, the
system is most likely over-charged, and charge
should be removed. If the actual pressure are
lower than shown, the system is most likely
undercharged, and charge should be added.
The air conditioner is now ready for use.
2. Settlement of outdoor unit
• Anchor the outdoor unit with a bolt and nut(ø10mm)
tightly and horizontally on a concrete or rigid mount.
• When installing on the wall, roof or rooftop, anchor the
mounting base securely with a nail or wire assuming
the influence of wind and earthquake.
PUMP DOWN
This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
• In the case when the vibration of the unit is conveyed
to the hose, secure the unit with an anti-vibration
bushing.
Pump Down means collecting all refrigerant in the
outdoor unit without loss in refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with the
unit cooling mode.
Bolt
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to
the charge port on the gas side service valve.
2. Open the gas side service valve halfway and purge
the air from the manifold hose using the refrigerant
gas.
Tubing connection
3. Evaluation of the performance
Operate unit for 15~20 minutes, then check the system
refrigerant charge:
3. Close the liquid side service valve(all the way in).
4. Turn on the unit's operating switch and start the
cooling operation.
1. Measure the pressure of the gas side service valve.
2. Measure the temperature of the intake and discharge
of air.
3. Ensure the difference between the intake tempera-
ture and the discharge is more than 8°C(46°F) (Cool-
ing) or (Heating).
5. When the low-pressure gauge reading becomes 1
to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the
gas side valve stem and then quickly turn off the
unit. At that time, Pump Down has been completed
and all refrigerant gas will have been collected in
the outdoor unit.
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Operation
Operation
Remote Control Operations
The controls will look like the following.
1. START/STOP BUTTON
Operation starts when this button is pressed and
stops when the button is pressed again.
Signal transmitter
2. OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3. ROOM TEMPERATURE SETTING BUTTONS
Used to select the room temperature.
4. INDOOR FAN SPEED SELECTOR
Used to select fan speed in four steps
low, medium, high and CHAOS.
1
2
3
5. JET COOL
5
6
Used to start or stop the speed cooling.(speed cooling
operates super high fan speed in cooling mode.)
1
6. CHAOS SWING BUTTON
3
Used to stop or start louver movement and set
the desired up/down airflow direction.
4
10
7. ON/OFF TIMER BUTTONS
2
CANCEL
Used to set the time of starting and stopping operation.
9
7
11
8
SET
ON
OFF
AUTO CLEAN
12
8. TIME SETTING BUTTONS
Used to adjust the time.
16
17
9. TIMER SET/CANCEL BUTTON
13
Used to set the timer when the desired time is obtained and
to cancel the Timer operation.
15
14
10. SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
11. AIR CIRCULATION BUTTON
Flip-up door
(opened)
Used to circulate the room air without cooling or heating.
12. ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
Operation Mode
13. NEO PLASMA(OPTIONAL)
Cooling Operation
Used to start or stop the plasma-purification function.
14. RESET BUTTON
Auto Operation or Auto Changeover
Healthy Dehumidification Operation
Used prior to resetting time.
15. 2nd F Button
Used prior to using modes printed in blue at the bottom of
buttons.
16. AUTO CLEAN (OPTIONAL)
Used to set Auto Clean mode.
17. ˚C TO ˚F SWITCHING BUTTON
Used to switch temperature reading from Centigrade to
Fahrenheit.
Heating Operation
•
Cooling Model( ), Heat Pump Model(
)
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Disassembly of the parts (Indoor unit)
Disassembly of the parts (Indoor unit)
Warning :
Disconnect the unit from power supply before making
any checks.
Be sure the power switch is set to “OFF”.
1. To remove the Grille from the Chassis.
∆
- Push mark[ ] on the grille bottom then pull it down
and remove 3 securing screws.
- Lift the both lower parts of panel front.
- After pull down this panel a bit, separate connecting
wire with product.
Panel Front
Connector
CN-DC/DC CN-UD
CN-LR2
CN-TH1
2. To remove the Control Box.
- Before removing the control box, be sure to
disconnect the wires from PWB.
- Pull the cover control out from the control box
and disconnect other wires.
- Remove securing screws.
- Pull the control box out from the chassis carefully.
CN-LR1
CN-MOTOR 2 (RIGHT)
CN-MOTOR 1 (LEFT)
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Disassembly of the parts (Indoor unit)
3. To remove the Evaporator.
- Remove 1 screws securing the evaporator.
- Pull the evaporator out from the chassis carefully.
4. Before removing the Turbo Fan.
Top Cover
- Remove the securing screws from the chassis.
- Pull the pipe cover, top cover and the air guide.
Air Guide
Pipe Cover
5. To remove the Motor.
- Remove the securing bolt from the motor shaft.
- Pull the fan out from the motor shaft.
Turbo Fan
Bracket
- Remove 4 screws securing motor mount from the
chassis and lift up the motor mount and the bracket.
Bolt
Motor Mount
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2-way, 3-way Valve
2-way, 3-way Valve
2-way Valve (Liquid Side)
3-way Valve (Gas Side)
Valve cap
Hexagonal wrench (4mm)
Open position
Closed position
Flare nut
Flare nut
Open position
Closed position
Pin
To
To
piping
piping
Service
port cap
Service
port
connection
connection
To outdoor unit
To outdoor unit
Works
Shaft position
Shaft position
Service port
Closed
(with valve cap)
Closed
(with valve cap)
Closed
(with cap)
Shipping
Air purging
Open
Closed
Open
1.
(Installation)
(counter-clockwise)
(clockwise)
(push-pin or with
vacumm pump)
Open
(with valve cap)
Open
(with valve cap)
Closed
(with cap)
Operation
Closed
(clockwise)
Open
Open
Pumping down
(Transfering)
(counter-clockwise) (connected manifold
gauge)
2.
3.
4.
Open
Open
Open
Open
(with charging
cylinder)
Evacuation
(Servicing)
Open
Open
(with charging
cylinder)
Gas charging
(Servicing)
Open
Pressure check
(Servicing)
(with charging cylinder)
Open
Open
Open
Open
5.
6.
Open
Gas releasing
(Servicing)
(with charging cylinder)
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2-way, 3-way Valve
1. Air purging
The air in the indoor unit and in the piping must be
purged. If air remains in the refrigeration pipes, it will
affect the compressor, reduce to cooling capacity, and
could lead to a malfunction.
Required tools : hexagonal wrench, adjustable
wrench, torque wrenches, wrench to
hold the joints, and gas leak detec-
tor.
The additional gas for air purging has been charged
in the outdoor unit.
However, if the flare connections have not be done
correctly and there gas leaks, a gas cylinder and the
charge set will be needed.
Liquid side
Indoor unit
Open
Outdoor unit
2-way
valve
Gas side
Clsed
3-way
valve
Service port nut:
Be sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents the
gas leakage from the refrigeration cycle.
*
CAUTION : Do not leak the gas in the air during Air purging.
nut to a torque of 1.8kg.cm.
• Procedure
(1) Recheck the piping connections.
(2) Open the valve stem of the 2-way valve coun-
terclockwise approximately 90°, wait 10 sec-
onds, and then set it to closed position.
– Be sure to use a hexagonal wrench to operate
the valve stem.
(3) Check for gas leakage.
Caution
– Check the flare connections for gas leakage.
If gas leakage are discovered in step (3) above,
take the following mesures :
(4) Purge the air from the system.
– Set the 2-way valve to the open position and
remove the cap from the 3-way valve’s service
port.
– Using the hexagonal wrench to press the valve
core pin, discharge for three seconds and then
wait for one minute. Repeat this three times.
If the gas leaks stop when the piping connections
are tightened further, continue working from step (4).
If the gas leaks do not stop when the connections
are retightened, repair the location of the leak, dis-
charge all of the gas through the service port, and
then recharge with the specified amount of gas
from a gas cylinder.
(5) Use torque wrench to tighten the service port
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2-way, 3-way Valve
2. Pumping down
Liquid side
2-Way
Indoor unit
Outdoor unit
Open
valve
Gas side
Closed
3-Way
valve
Lo
CLOSE
CLOSE
Purge the air
• Procedure
(6) Operate the air conditioner at the cooling
cycle and stop it when the gauge indicates
1kg/cm2g.
(1) Confirm that both the 2-way and 3-way valves
are set to the open position.
– Remove the valve stem caps and confirm that
the valve stems are in the raised position.
– Be sure to use a hexagonal wrench to operate
the valve stems.
(7) Immediately set the 3-way valve to the closed
position.
– Do this quickly so that the gauge ends up indi-
cating 3 to 5kg/cm2g.
(2) Operate the unit for 10 to 15 minutes.
(8) Disconnect the charge set, and mount the 2-
way and 3-way valve’s stem nuts and the ser-
vice port nut.
(3) Stop operation and wait for 3 minutes, then
connect the charge set to the service port of
the 3-way valve.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
– Connect the charge hose with the push pin to
the service port.
(4) Air purging of the charge hose.
– Open the low-pressure valve on the charge set
slightly to air purge from the charge hose.
Do not use the existing charge set for R-22.
It is necessary to use new charge set for R-
410A. The pressure of R-410A is 1.6 times
higher than that of R-22. Thus, the high pres-
sure side gauge of charge set should be used
higher pressure gauge of 50kg/cm2 range.
(5) Set the 2-way valve to the closed position.
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2-way, 3-way Valve
1) Re-air purging
(Re-installation)
Liquid side
2-Way
Indoor unit
Closed
Outdoor unit
valve
Gas side
Closed
3-Way
valve
Gas cylinder
Lo
R22
OPEN
CLOSE
• Procedure
(6) Disconnect the charge set and the gas cylin-
der, and set the 2-way and 3-way valves to the
(1) Confirm that both the 2-way valve and the 3-
way valve are set to the closed position.
open position.
– Be sure to use a hexagonal wrench to operate
(2) Connect the charge set and a gas cylinder to
the service port of the 3-way valve.
the valve stems.
– Leave the valve on the gas cylinder closed.
(7) Mount the valve stem nuts and the service
port nut.
(3) Air purging.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
– Open the valves on the gas cylinder and the
charge set. Purge the air by loosening the flare
nut on the 2-way valve approximately 45° for 3
seconds then closing it for 1 minute; repeat 3
times.
*
CAUTION:
Do not leak the gas in the air during Air Purg-
ing.
– After purging the air, use a torque wrench to
tighten the flare nut on the 2-way valve.
(4) Check for gas leakage.
– Check the flare connections for gas leakage.
(5) Discharge the refrigerant.
– Close the valve on the gas cylinder and dis-
charge the refrigerant until the gauge indicates
3 to 5 kg/cm2g.
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2-way, 3-way Valve
2) Balance refrigerant of the 2-way, 3-way valves
(Gas leakage)
Liquid side
Indoor unit
Outdoor unit
2-Way
valve
Open
Gas side
3-Way
valve
Open
Lo
OPEN
CLOSE
(3) Open the valve (Lo side) on the charge set
and discharge the refrigerant until the gauge
indicates 0 kg/cm2G.
• Procedure
(1) Confirm that both the 2-way and 3-way valves
are set to the back seat.
– If there is no air in the refrigerant cycle (the
pressure when the air conditioner is not run-
ning is higher than 1 kg/cm2G), discharge the
refrigerant until the gauge indicates 0.5 to 1
kg/cm2G. if this is the case, it will not be neces-
sary to apply a evacuatin.
– Discharge the refrigerant gradually; if it is dis-
charged too suddenly, the refrigeration oil will
also be discharged.
(2) Connect the charge set to the 3-way valve’s
port.
– Leave the valve on the charge set closed.
– Connect the charge hose with the push pin to
the service port.
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2-way, 3-way Valve
3. Evacuation
(All amount of refrigerant leaked)
Liquid side
Indoor unit
Outdoor unit
2-Way
valve
Open
Gas side
3-Way
valve
Open
Vacuum pump
Lo
OPEN
CLOSE
(4) Disconnect the charge hose from the vacuum
pump.
• Procedure
– Vacuum pump oil.
(1) Connect the vacuum pump to the charge set’s
If the vacuum pump oil becomes dirty or
depleted, replenish as needed.
center hose
(2) Evacuation for approximately one hour.
– Confirm that the gauge needle has moved
toward -76 cmHg (vacuum of 4 mmHg or less).
(3) Close the valve (Lo side) on the charge set,
turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima-
tely 5 minutes after turning off the vacuum
pump).
Use vacuum pump equipped with check value
applied to be prevented from flowing backward.
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2-way, 3-way Valve
4. Gas Charging
(After Evacuation)
Liquid side
2-Way
Indoor unit
Outdoor unit
Open
valve
Gas side
Open
3-Way
valve
Check valve
Charging
cylinder
Lo
(1)
OPEN
CLOSE
• Procedure
\
This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.
(1) Connect the charge hose to the charging
cylinder.
– Connect the charge hose which you dis-con-
nected from the vacuum pump to the valve at
the bottom of the cylinder.
– If you are using a gas cylinder, also use a scale
and revers the cylinder so that the system can
be charged with liquid.
(4) Immediately disconnect the charge hose from
the 3-way valve’s service port.
– Stopping partway will allow the gas to be dis-
charged.
– If the system has been charged with liquid
refrigerant while operating the air conditioner
turn off the air conditioner before disconnecting
the hose.
(2) Purge the air from the charge hose.
– Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air. (Be careful of the liquid refriger-
ant). The procedure is the same if using a gas
cylinder.
(3) Open the valve (Lo side on the charge set and
charge the system with liquid refrigerant.
– If the system can not be charged with the spec-
ified amount of refrigerant, it can be charged
with a little at a time (approximately 150g each
time) while operating the air conditioner in the
cooling cycle; however, one time is not suffi-
cient, wait approximately 1 minute and then
repeat the procedure (pumping down-pin).
(5) Mount the valve stem nuts and the service
port nut.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
This unit is charged with R-410A.
Pay attention not to charge R-22.
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2-way, 3-way Valve
Additional gas charging
(Gas leakage)
• When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal oper-
ating suction pressure.
• Use the graph or the equation below to get operating suction pressure according to indoor and out-
door temperature.
Suction pressure was measured at 3-way valve service port after operating the unit for 10 minutes.
The method of using graph
- Find outdoor temperature.
- Find indoor temperature onto the curve of outdoor temperature.
- Read suction pressure at the axis of ordinates.
The method of using equation
-. Calculate suction pressure after putting indoor and outdoor temperature into the equation.
Operating Suction Pressure (For R410A)
(According to Indoor & Outdoor Temperature)
(At operating the Unit for 10 minutes)
13
50˚C
12
40˚C
11
10
9
30˚C
20˚C
10˚C
8
0˚C
7
6
5
5
10
15
20
25
30
35
40
Indoor Temp. (˚C)
P = 3 + 0.0123 x Tout1.5 + 0.8 x Tin0.5
2
.
Where, P
: Suction Pressure(kg/cm g)
Tout : Outdoor Temperature(˚C)
Tin : Indoor Temperature(˚C)
Service Manual 53
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Cycle Troubleshooting Guide
Cycle Troubleshooting Guide
1. Trouble analysis
1. Check temperature difference between intake and discharge air and operating current.
Temp. difference :approx. 0°F
All amount of refrigerant leaked out.
Check refrigeration cycle.
Current
:less than 80% of
rated current
Temp. Difference
Operating Current
Temp. difference :approx. 8°C(14°F)
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Current
:less than 80% of
rated current
Temp. difference :less than 8°C(14°F)
Current
:less than 80% of
rated current
Excessive amount of refrigerant
Normal
Temp. difference :over 8°C(14°F)
Notice:
Temperature difference between intake and discharge air depends on room air humidity. When the room air humid-
ity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower
temperature difference is larger.
2. Check temperature and pressure of refrigeration cycle.
Suction pressure
Temperature
(Compared with the (Compared with the
Cause of Trouble
Description
normal value)
Higher
normal value)
High
Defective compressor
Defective 4-way reversing valve
Current is low.
High pressure does not quickly
rise at the beginning of operation.
Normal
Higher
Excessive amount of refrigerant
Insufficient amount of
refrigerant(Leakage)
Clogging
Current is low.
Current is low.
Lower
Notice:
2
1. The suction pressure is usually 8.5~9.5 kg/cm G at normal condition.
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with put-
ty.
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Cycle Troubleshooting Guide
2. Product does not operate at all.
(* Refer to Electronic Control Device drawing and Schematic diagram.)
Turn off Main Power
(After 20 seconds)
Turn on Main Power
Does "beeping" sound is made from the Indoor Unit?
YES
NO
Primarily, the operating condition of Micom is OK.
Check the voltage of power(About AC 208V/AC230V, 60Hz)
• Main power's voltage
• Voltage applied to the unit
• Connecting method of Indoor/Outdoor connecting
cable
• Check PWB Ass'y(Outdoor unit)
- Fuse
Check each load(Indoor/Outdoor Fan Motor, Com-
pressor, Stepping Motor) and contacting
condition of related connector(including connecting
cable of Indoor/Outdoor Unit)
- Pattern damage
- Varistor(ZNR01J)
Check the connection housing for contacting
• Connector related to CN-POWER
• Connector related to CN-FAN
• Connector contacting of Outdoor Fan/Compressor
• Display PWB Ass'y Check
• Connector related to CN-DC/DC
PCB Board Operation Check
Content
Remedy
Items
• Power Transformer
(Outdoor unit)
±
- Input Voltage
- Output Voltage
- About AC 208V/AC 230V 10%
• Replace SMPS Mod-
ule
- Check the power voltage
±
- About DC15V 3
• IC01D(7812) Output
(Indoor/Outdoor unit)
• Replace IC01D
+
• DC 12V
• IC02D(7805) Output (Indoor unit)
IC04D(7805) Output (Outdoor unit)
• Replace
IC02D(Indoor unit)
IC04D(Outdoor unit)
+
• DC 5V
• IC01A(KIA7036, Reset IC)
OSC01B(4MHz)
(Indoor/Outdoor unit)
• Voltage of Outdoor unit Micom No. 18,
Voltage of Indoor unit Micom No. 43 and
soldering condition
• Replace faulty parts
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Cycle Troubleshooting Guide
3. The product is not operate with the remote controller.
Turn on Main Power
While the compressor has been stopped, the compressor does not
operate owing to the delaying function for 3 minutes after stopped.
When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the
low speed by force.)
Caused by other parts except the remote controller
Cause by the remote controller
When the mark(
battery.
) is displayed in LCD screen, replace
Check the contact of CN-D1/D2 connector.
When the detect switch(double key) inside the remote
controller door is fault, it is impossible to operate
Check DISP PWB Ass'y
- Voltage between CN-D2
+
-
: DC 5V
temperature regulating(
/
) and wind speed selecting.
Check the connecting circuit between the remote controller
MICOM (No. ) - R17(2Ω) - IR LED - Q1 - R16(2.2KΩ).
Check point
• Check the connecting circuit between PIN - R75(1K)
- C71(1000PF) - MICOM PIN
• Check Receiver Ass'y
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Cycle Troubleshooting Guide
4. Compressor/Outdoor Fan are unable to drive.
Turn on Main Power
Operate "Cooling Mode( )" by setting the desired temperature of the
remote controller is less than one of the indoor temperature by 2°F at least.
When in Fan Mode, Compressor/Outdoor Fan is stopped.
Check the sensor for indoor temperature is attached as close as to be
effected by the temperature of Heat Exchanger(EVA).
When the sensor circuit for indoor temperature and connector are in bad
connection or are not engaged, Compressor/Outdoor Fan is stopped.
• Check the related circuit of R02(12.1K), R04(6.2K), Micom (No.27)
(Indoor unit).
• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 77°F).
When the temperature around Outdoor PWB Ass'y is above 163°F the com-
pressor is stop and only Outdoor Fan is operating.
Check Relay(RY - COMP) for driving compressor.
• When the power(About AC200V) is applied to the connecting wire terminal
support transferred to compressor, PWB Ass'y is normal.
• Check the circuit related to the relay(Outdoor unit).
Check point
Between Micom(No.
5, 6) and GND
COMP ON
COMP OFF
DC5V
DC0V
Between IC01M, IC02M(No. 9)
and IC01M, IC02M(No. 8)
Below DC 1V
(app)
About DC12V
Turn off Main Power
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of Compressor/Outdoor
Fan Motor.
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Cycle Troubleshooting Guide
5. When Indoor Fan does not operate.
Does the voltage of each terminals of CN-MOTOR CONNECTOR in
Indoor unit corresponds to values in the Table of page 63?
Does the voltage of terminal of CN-DC/DC CONNECTOR in
Check connecting condition of the CN-MOTOR CON-
Indoor unit corresponds to the values in the table of page 63?
NECTOR
Do the voltage of terminal of
Check the pattern and the
CN-DC/DC CONNECTOR in
condition of Indoor unit PWB
Outdoor unit corresponds to the
Ass'y.
Check the interference of Indoor Fan.
values in the table of page 63?
NO
Check the connecting condi-
Check the patterns and the
tion and disconnection of
Check the motor of Indoor Fan
conditions of outdoor unit
connecting wires between
PWB Assy's.
Indoor and Outdoor unit.
Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode).
Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F.
(At that times, Defrost indicator is turned on)
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Cycle Troubleshooting Guide
6. When Vertical Louver does not operate.
• Confirm that the Vertical Louver is normally geared with the shaft of Step-
ping Motor.
• If the regular torque is detected when rotating the Vertical Louver with
hands Normal
• Check the connecting condition of CN-U/D, CN-L/R Connector
• Check the soldering condition(on PWB) of CN-U/D, CN-L/R Connector
Check the operating circuit of the Vertical Louver
+
• Confirm that there is DC 12V between pin (RED) of CN-U/D, CN-L/R
and GND.
• Confirm that there is a soldering short at following terminals.
- Between 62 , 61 , 60 and 59 of MICOM
- Between 57 , 56 , 55 and 54 of MICOM
- Between 51 , 50 , 49 and 48 of MICOM
- Between 1 , 2 , 3 , 4 and 5 of CN-U/D, CN-L/R
If there are no problems after above checks
• Confirm the assembly conditions that are catching and interfering parts in
the rotation radial of the Vertical Louver
Service Manual 59
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Cycle Troubleshooting Guide
7. When a comunication error occurs.
• The operation indicator of Indoor unit blinks five times.
• The red indicator of Outdoor unit blinks five times.
Check the connecting wires between Indoor and Outdoor unit for the
connecting error and the contacting condition.
Check the installation condition of outdoor unit.
Check for the communication error and the operating condition of product
after also operating with the remote controller, then taking above 2 minutes.
Apply the power again after about 20 seconds by the power of Outdoor unit
is off.
Check for the communication error and the operating condition of product
after also operating with the remote controller, then taking above 2 minutes.
Check the PWB assembly of Indoor and Outdoor unit.
Caution: If the connecting wires of Indoor and Outdoor unit are not connected within 2 minutes after the power
of Outdoor unit is applied, a communication error will occur. Therefore, the power should be applied
after connecting them.
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Cycle Troubleshooting Guide
8. The phenomena in case of connecting error
INDOOR UNIT
Connector Type
CN-DC/DC
Phenomena
Condition
Open and connecting error
• The same as the phenomenon of Outdoor Unit.
Blue
Black
Brown
Red
• The indoor fan does not operate.
• The operation indicator of Indoor unit blinks 8 times.
CN-MOTOR
Open
Open
Short between terminals
Open
• The up/down vane does not operate.
CN-UD
• The up/down vane does not smoothly operate.
• It does not operate with a remote controller.
CN-D1/D2
• The operation indicator blinks once.
On for 0.5 second
Open
Off for 3 seconds
• The compressor and the outdoor fan stop.
• The indoor fan speed is low.
CN-TH
• The operation indicator blinks once
(on for 0.5 second, off for 3 seconds).
• The compressor operates continuously regardless
of the setting temperature and the variation of room
temperature.
Short between terminals
(
and ) of ROOM-TH.
• The operation indicator blinks once
(on for 0.5 second, off for 3 seconds)
• Continuous operation
Short between terminals
(
and ) of PIPE-TH.
Service Manual 61
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Cycle Troubleshooting Guide
OUTDOOR UNIT
Connector Type
Phenomena
Condition
OPEN
• All functions stop.
• The operation with the remote controller, forced and
test one do not operate.
CN-POWER
Connecting reversely
OPEN
• PWB pattern is damaged when applying the power.
• All functions stop or the compressor does not operate.
• The operation with the remote controller, forced and test
one do not operate.
RY-COMP
terminal
• All functions stop.
• The operation with the remote controller, forced and test
one do not operate.
Connecting reversely
• All functions stop.
• The operation with the remote controller, forced and
test one do not operate.
OPEN
OPEN
OPEN
CN-TRANS
CN-FAN
• The Indoor Fan does not operate.
• All functions stop.
• The operation with the remote controller, forced and test
one do not operate.
The connecting
wire of CN-
DC/DC, and
Indoor and Out-
door Unit
• The only signal of remote controller operation/stop is
inputted, but the product does not operate.
• The RED indicator of outdoor unit blinks 5 times after 2
minutes with applying the power.
Connecting error
(
)
• The beep sound, such as "beep, beep, beep, beep,
beep", occurs periodically in Indoor unit.
• The signal input of a remote controller and operation of
product is impossible.
• The RED indicator blinks 5 times after 2 minutes with
applying the power.
Blue
Connecting error
Black
Brown
Red
(
)
• The signal of remote controller is inputted, but the
product does not operate.
• The RED indicator of outdoor unit and the operation
indicator of indoor one blinks 5 times after 2 minutes
with applying the power.
Connecting error
(
)
• No power for Indoor unit.
• The signal input of the remote controller and opera-
tion of product is impossible.
• The thermal protector of the Power Trans operates
when let it alone for long time.
Connecting error
(
)
• The signal of the remote controller is inputted.
• The fuse and Q61 in the Outdoor unit are damaged
when the indoor fan is operated.
Connecting error
(
)
• No power for Indoor unit.
• The signal input of the remote controller and opera-
tion of product is impossible.
• The RED indicator of the Outdoor unit blinks 5 times
after 2 minutes with applying the power.
Connecting error
(
)
62 Room Air Conditioner
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Cycle Troubleshooting Guide
9. Voltage of Connectors according to Indoor Fan Speed
Service Manual 63
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Electronic Control Device
Electronic Control Device
MAIN PWB ASSY(Indoor Unit)
• TOP VIEW
• BOTTOM VIEW
• PWB ASSY SVC PART LIST
OPTIONAL FUNCTION
NO
MODEL
P/No.
OR1H
OR2H
OR3H
OR4H
OR5H
OR6H
1
18K Cooling Model
6871A20387J
12K
20K
27K
12K
OPEN
OPEN\
OJ1H, OJ2H, : SHORT
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Electronic Control Device
MAIN PWB ASSY(Outdoor Unit)
• TOP VIEW
• BOTTOM VIEW
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Electronic Control Device
DISPLAY PWB ASSEMBLY
• TOP VIEW
• BOTTOM VIEW
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Schematic Diagram
Schematic Diagram
Indoor Unit
O R R D
O R R D
O R R D
O R R D
B L P K Y L
B L P K Y L
B L P K Y L
B L P K Y L
FG
5V
AVdd1
AVss
R D O R
R D O R
Y L P K B L
Y L P K B L
Service Manual 67
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Schematic Diagram
Outdoor Unit
68 Room Air Conditioner
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Exploded View and Replacement Parts List
Exploded View and Replacement Parts List
Indoor Unit
352380-2
249951
352380-1
146811
147581
135311-2
268711-2
131410
135500-2
146811
147581
349490
346810-2
359012-2
346810-1
147581
135500-1
146811
359012-1
135311-3
135311-1
330870
135500-3
567480
267110
354210
159830
268711-1
352115
352116
352150
35211B
135313
135316
152302
Service Manual 69
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Exploded View and Replacement Parts List
Parts List(indoor)
PART No.
LOCATION
DESCRIPTION
No.
REMARKS
LAN181CNW(ASNC183VML3)
LA180CPF(ASNC183UML3)
131410
135311-1
135311-2
135311-3
135316
CHASSIS ASSEMBLY
3141A20008J
3531A20124K
3531A20124J
3531A20125G
3531A10334J
3550A20512B
3550A20120B
3550A20121B
4681A20055A
4758A20033A
4758A20034A
5230A10011A
5983A20006P
4995A20825A
6323A20004N
6711A20083R
6871A20462D
6871A20387J
3087A20013B
4681A20047C
4681A20047D
4949A20002C
5211A20302C
5211A20301F
5211A30038X
5251AR1222R
5238A10009A
5238A10010A
5421A20104C
5900A00004A
5900A00005A
3531A10270T
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
GRILLE ASSEMBLY,DISCHARGE(INDOOR)
GRILLE ASSEMBLY,DISCHARGE(INDOOR)
GRILLE ASSEMBLY,DISCHARGE(INDOOR)
GRILLE ASSEMBLY,FRONT(INDOOR)
COVER
135500-1
135500-2
135500-3
146811
COVER
COVER
MOTOR ASSEMBLY,STEP
LOUVER,HORIZONTAL
LOUVER,VERTICAL
147581
147582
152302
FILTER(MECH),A/C
159830
AIR CLEANER ASSEMBLY
CONTROL BOX ASSEMBLY,INDOOR
THERMISTOR ASSEMBLY
REMOTE CONTROLLER ASSEMBLY
PWB(PCB) ASSEMBLY,DISPLAY
PWB(PCB) ASSEMBLY,MAIN
DRAIN PAN ASSEMBLY
MOTOR ASSEMBLY,INDOOR
MOTOR ASSEMBLY,INDOOR
ORIFICE ASSEMBLY
249951
263230
267110
268712
268714
330870
346810-1
346810-2
349490
352115
TUBE ASSEMBLY,EVAPORATOR IN
TUBE ASSEMBLY,EVAPORATOR OUT
TUBE ASSEMBLY,TUBING
HOSE ASSY,DRAIN
352116
35211B
352150
352380-1
352380-2
354210
AIR GUIDE
AIR GUIDE
EVAPORATOR ASSEMBLY,FIRST
FAN,TURBO
359012-1
359012-2
135313
FAN,TURBO
GRILLE ASSEMBLY, INLET
NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request.
*
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70 Room Air Conditioner
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Exploded View and Replacement Parts List
2. Outdoor unit(18K)
Service Manual 71
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Exploded View and Replacement Parts List
Parts List(outdoor)
PART No.
LOCATION
DESCRIPTION
No.
REMARKS
LAU181CNW(ASUC183VML3)
LA180CPO(ASUC183VML3)
552203-1
552203-2
554031
VALVE,SERVICE
2H02479B
5220A20006A
5403A20058B
2520UGJK2AA
2520UGAK2AA
1A00195B
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
VALVE,SERVICE
CONDENSER ASSY,BENT
COMPRESSOR SET
554160-1
554160-2
559010
COMPRESSOR SET
FAN ASSY, PROPOLLER
O.L.P
567502-1
567502-2
649950
6750U-L039A
6750U-L058A
4995A20383W
6871A10184E
3A00988B
O.L.P
CONTROL BOX ASSY, OUTDOOR
PWB(PCB) ASSY, MAIN(OUTDOOR)
CAPACITOR, DRAWING
CAPACITOR, DRAWING
BASE ASSY, OUTDOOR
COVER ASSY, CONTROL(OUTDOOR)
PANEL ASSY, FRONT (OUTDOOR)
PANEL ASSY, REAR (OUTDOOR)
ISOLATOR, COMP
668711
W0CZZ-1
W0CZZ-2
430410
6120AR2194D
3041AP2741G
3551AR7184T
3721A20005H
3720AP0003D
4H00637A
435511
437210
437212
550140-2
546810
MOTOR ASSY, OUTDOOR
SWITCH,PRESSURE
4681A20013N
6600L000013
3H03266P
566000
435512
COVER ASSY, TOP(OUTDOOR)
TUBE ASSEMBLY, CONDENSER OUT
VALVE, EXPANSION BODY
COIL ASSEMBLY, EXPANSION
GRILLE, DISCHARGE
55211G
552200
5211A25034C
5220A90003B
6141A20032A
3530A20007B
4791A30004K
6323A20002L
6323A20016A
561411
435301
447910
BARRIER ASSEMBLY OUTDOOR
THERMISTOR ASSEMBLY
THERMISTOR ASSEMBLY
263230-1
263230-2
NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request.
*
(GCSC WEBSITE http://biz.LGservice.com)
72 Room Air Conditioner
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P/No.: 3828A20065Y
Printed in Korea
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|