Toshiba Air Conditioner RAV SM2244AT7 User Manual

FILE NO. A09-004

SERVICE MANUAL

AIR-CONDITIONER

SPLIT TYPE

OUTDOOR UNIT

RAV-SM2244AT8-E RAV-SM2804AT8-E

RAV-SM2244AT8Z-E RAV-SM2804AT8Z-E

RAV-SM2244AT8ZG-E RAV-SM2804AT8ZG-E

RAV-SM2244AT7

RAV-SM2804AT7

RAV-SM2244AT7Z RAV-SM2804AT7Z

RAV-SM2244AT7ZG RAV-SM2804AT7ZG

R410A

PRINTED IN JAPAN, Jun, 2009 ToMo

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7. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS ........... 45

7-1. Outdoor Unit Control ........................................................................................ 45

7-2. Outline of Main Controls .................................................................................. 49

8. TROUBLESHOOTING .............................................................................. 55

8-1. Summary ofTroubleshooting........................................................................... 55

8-2. Troubleshooting ................................................................................................ 57

9. SETUP AT LOCAL SITE AND OTHERS .................................................. 80

9-1. Calling of Error History .................................................................................... 80

9-2. Group Control Operation ................................................................................. 80

9-3. Outdoor Unit...................................................................................................... 82

10. ADDRESS SETUP.................................................................................... 89

10-1. Address Setup Procedure................................................................................ 89

10-2. Address Setup & Group Control...................................................................... 90

10-3. Remote Controller Wiring................................................................................. 93

10-4. Address Setup (Manual setting from remote controller)............................... 94

10-5. Confirmation of Indoor Unit No. Position ....................................................... 95

11. INSTALLATION MANUAL ........................................................................ 97

12. REPLACEMENT OF

THE SERVICE P.C. BOARD (4316V392) MCC-1599 ............................. 110

13. HOWTO EXCHANGE COMPRESSOR .................................................. 111

13-1. Exchanging Procedure of Compressor (Outline)......................................... 111

13-2. Exchange of Compressor .............................................................................. 111

14. DETACHMENTS ..................................................................................... 112

14-1. Outdoor Unit.................................................................................................... 112

15. EXPLODED VIEWS AND PARTS LIST .................................................. 124

15-1. Outdoor Unit.................................................................................................... 124

15-2. Inverter Assembly........................................................................................... 126

15-3. Outdoor Unit.................................................................................................... 128

15-4. Inverter Assembly........................................................................................... 130

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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

(Indications/Illustrated marks), and keep them.

[Explanation of indications]

Indication

Explanation

Indicates contents assumed that an imminent danger causing a death or serious injury of

the repair engineers and the third parties when an incorrect work has been executed.

DANGER

Indicates possibilities assumed that a danger causing a death or serious injury of the

repair engineers, the third parties, and the users due to troubles of the product after work

when an incorrect work has been executed.

WARNING

CAUTION

Indicates contents assumed that an injury or property damage (∗) may be caused on the

repair engineers, the third parties, and the users due to troubles of the product after work

when an incorrect work has been executed.

∗ Property damage : Enlarged damage concerned to property, furniture, and domestic animal/pet

[Explanation of illustrated marks]

Mark

Explanation

Indicates prohibited items (Forbidden items to do)

The sentences near an illustrated mark describe the concrete prohibited contents.

Indicates mandatory items (Compulsory items to do)

The sentences near an illustrated mark describe the concrete mandatory contents.

Indicates cautions (Including danger/warning)

The sentences or illustration near or in an illustrated mark describe the concrete cautious contents.

[Confirmation of warning label on the main unit]

Confirm that labels are indicated on the specified positions

(Refer to the Parts disassembly diagram (Outdoor unit).)

If removing the label during parts replace, stick it as the original.

DANGER

Turn “OFF” the breaker before removing the front panel and cabinet, otherwise an electric

shock is caused by high voltage resulted in a death or injury.

During operation, a high voltage with 400V or higher of circuit (∗) at secondary circuit of the

high-voltage transformer is applied.

If touching a high voltage with the naked hands or body, an electric shock is caused even if using an

electric insulator.

Turn off breaker.

• Attach a plate indicating “WORKING” or others on the breaker so that you don’t accidentally turn

on the breaker during work.

∗ : For details, refer to the electric wiring diagram.

When removing the front panel or cabinet, execute short-circuit and discharge between

high-voltage capacitor terminals.

If discharge is not executed, an electric shock is caused by high voltage resulted in a death or injury.

Execute discharge

between terminals. After turning off the breaker, high voltage also keeps to apply to the high-voltage capacitor.

Do not turn on the breaker under condition that the front panel and cabinet are removed.

An electric shock is caused by high voltage resulted in a death or injury.

Prohibition

– 4 –

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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.

Prohibition of modification.

Use specified parts.

Do not modify the products.

Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury.

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.

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

close to the equipment.

Please inform the users so that the third party (a child, etc.) does not approach the equipment.

Connect the cut-off lead wires 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.

Insulating measures

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.

No fire

When using it without ventilation, carbon monoxide poisoning may be caused.

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

refrigerating 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

recovering device. The refrigerant cannot be recovered in the outdoor unit; otherwise a

serious accident such as breakage or injury is caused.

After repair work, surely assemble the disassembled parts, and connect and lead the

removed wires as before. Perform the work so that the cabinet or panel does not

catch the inner wires.

If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or

fire is caused at user’s side.

Assembly/Cabling

– 5 –

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WARNING

After the work has finished, be sure to use an insulation tester set (500V Megger) to

check the resistance is 2MΩ or more between the charge section and the non-charge

metal section (Earth position).

Insulator check

Ventilation

If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side.

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.

Check after repair

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.

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.

Check after reinstallation

1) The earth wire is correctly connected.

2) The power cord is not caught in the product.

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 the gloves (∗) and a long sleeved shirt:

otherwise 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.

– 6 –

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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 refrigerant or the former refrigerating oil is not mixed into the

refrigerating cycle of the air conditioner with new refrigerant 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 conditioner 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

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.)

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.

– 7 –

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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

air conditioner installation

Conventional air

conditioner installation

No.

Used tool

Usage

Existence of

new equipment

for R410A

Whether conven-

tional equipment

can be used

Whether conventional

equipment can be used

Flare tool

Pipe flaring

Ye s

∗ (Note)

N o

Ye s

∗ (Note)

‚

Copper pipe gauge for

adjusting projection margin flare tool

Flaring by conventional

Torque wrench

Tightening of flare nut

„

ꢀ

†

Gauge manifold

Charge hose

Evacuating, refrigerant

charge, run check, etc.

Ye s

N o

Vacuum pump adapter

Vacuum evacuating

Refrigerant charge

Ye s

N o

Ye s

Electronic balance for

refrigerant charging

Ye s

‡

Refrigerant cylinder

Leakage detector

Refrigerant charge

Gas leakage check

Ye s

N o

‰

Ye s

(Note) 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.

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. Use vacuum pump by attaching vacuum pump adapter.

2) Torque wrench

3) Pipe cutter

4) Reamer

8) Spanner or Monkey wrench

9) Hole core drill

10) Hexagon wrench (Opposite side 4mm)

11) Tape measure

5) Pipe bender

6) Level vial

12) Metal saw

7) Screwdriver (+, –)

Also prepare the following equipments for other installation method and run check.

1) Clamp meter

2) Thermometer

3) Insulation resistance tester (Megger)

4) Electroscope

– 8 –

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n Combination Pattern (Indoor Unit / Outdoor Unit)

<RAV-SM2244AT series>

Simultaneous twin

4-way air discharge

cassette type

Concealed

duct type

Ceiling type

RAV-SM1104UT-E

RAV-SM1102BT-E

RAV-SM1102CT-E

Simultaneous triple

4-way air discharge

cassette type

Concealed

duct type

High wall type

(2 series)

Ceiling type

RAV-SM804UT-E

RAV-SM802BT-E

RAV-SM802CT-E

RAV-SM802KRT-E

Simultaneous double twin

4-way air discharge

cassette type

Compact 4-way

Concealed

duct type

High wall type

(2 series)

Slim duct type

Ceiling type

cassette (600×600) type

RAV-SM562MUT-E

RAV-SM564UT-E

RAV-SM564SDT-E

RAV-SM562BT-E

RAV-SM562CT-E

RAV-SM562KRT-E

<RAV-SM2804AT series>

Simultaneous twin

4-way air discharge

cassette type

Concealed

duct type

Ceiling type

RAV-SM1404UT-E

RAV-SM1402BT-E

RAV-SM1402CT-E

Simultaneous triple

4-way air discharge

cassette type

Concealed

duct type

High wall type

(2 series)

Ceiling type

RAV-SM804UT-E

RAV-SM802BT-E

RAV-SM802CT-E

RAV-SM802KRT-E

Simultaneous double twin

4-way air discharge

cassette type

Concealed

duct type

High wall type

(2 series)

Ceiling type

RAV-SM804UT-E

RAV-SM802BT-E

RAV-SM802CT-E

RAV-SM802KRT-E

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RAV-SM2244AT series

Branch kit

Slimultaneous twin

SM110

SM80

SM56

—

SM110

RBC-TWP101E

Simultaneous triple

SM80

SM56

—

SM80

SM56

RBC-TRP100E

Simultaneous double twin

—

SM56

RBC-DTWP101E

RAV-SM2804AT series

Branch kit

Slimultaneous twin

SM140

SM80

—

SM140

RBC-TWP101E

Simultaneous triple

SM80

—

SM80

RBC-TRP100E

Simultaneous double twin

—

SM80

RBC-DTWP101E

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1. SPECIFICATIONS

1-1. Indoor Unit

1-1-1. 4-Way CassetteType

Indoor unit 1

RAV-SM

(kW)

1104UT-E

2244AT8-E

20.0

1404UT-E

2804AT8-E

23.0

1104UT-E

2244AT7

20.0

1404UT-E

2804AT7

23.0

Model

Indoor unit 2

Outdoor unit

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 10.09 – 9.24 13.24 – 12.12

10.09

6.24

13.24

8.19

(kW)

(%)

6.24

8.19

EER

3.21

2.81

3.21

—

2.81

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A)

(kW)

(%)

9.41 – 8.61 12.09 – 11.07

9.41

5.82

12.09

7.48

characteristics

5.82

7.48

Heating Power factor

COP

3.85

3.61

3.85

—

3.61

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Turbo fan

Fan unit

Standard air flow H/M/L

(m³/min.) 33.5/24.0/19.5 35.0/24.0/20.5 33.5/24.0/19.5 35.0/24.0/20.5

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

Sound pressure level

Sound power level

43 / 38 / 33

58 / 53 / 48

44 / 38 / 34

59 / 53 / 49

43 / 38 / 33

58 / 53 / 48

44 / 38 / 34

59 / 53 / 49

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 11 –

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1-1-2. DuctType

Indoor unit 1

RAV-SM

(kW)

1102BT-E

2244AT8-E

20.0

1402BT-E

2804AT8-E

23.0

1102BT-E

2244AT7

20.0

14002BT-E

1402BT-E

2804AT7

23.0

Model

Indoor unit 2

Outdoor unit

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

characteristics

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Centrifugal

Fan unit

Standard air flow H/M/L

(m³/min.) 27.0/23.0/18.9 33.0/28.0/23.1 27.0/23.0/18.9 33.0/28.0/23.1

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

120

Sound pressure level

Sound power level

42 / 39 / 36

57 / 54 / 51

44 / 41 / 38

59 / 56 / 53

42 / 39 / 36

57 / 54 / 51

44 / 41 / 38

59 / 56 / 53

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 12 –

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1-1-3. CeilingType

Indoor unit 1

RAV-SM

(kW)

1102CT-E

2244AT8-E

20.0

1402CT-E

2804AT8-E

23.0

1102CT-E

2244AT7

20.0

1402CT-E

2804AT7

23.0

Model

Indoor unit 2

Outdoor unit

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

characteristics

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Centrifugal

Fan unit

Standard air flow H/M/L

(m³/min.) 27.5/24.0/21.2 30.0/26.0/23.1 27.5/24.0/21.2 30.0/26.0/23.1

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

120

Sound pressure level

Sound power level

41 / 38 / 35

56 / 53 / 50

43 / 40 / 37

58 / 55 / 52

41 / 38 / 35

56 / 53 / 50

43 / 40 / 37

58 / 55 / 52

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 13 –

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1-1-4. 4-Way CassetteType

Indoor unit 1

RAV-SM

(kW)

804UT-E

2244AT8-E

20.0

804UT-E

2804AT8-E

23.0

804UT-E

2244AT7

20.0

804UT-E

2804AT7

23.0

Indoor unit 2

Model

Indoor unit 3

Outdoor unit

Cooling capacity

Heating capacity

(kW)

22.4

27.0

22.4

27.0

Power supply

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

characteristics

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Turbo fan

Fan unit

Standard air flow H/M/L

(m³/min.) 20.5/16.0/13.5 20.5/16.0/13.5 20.5/16.0/13.5 20.5/16.0/13.5

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

Sound pressure level

Sound power level

35 / 31 / 28

50 / 46 / 43

35 / 31 / 28

50 / 46 / 43

35 / 31 / 28

50 / 46 / 43

35 / 31 / 28

50 / 46 / 43

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 14 –

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1-1-5. DuctType

Indoor unit 1

RAV-SM

(kW)

802BT-E

2244AT8-E

20.0

802BT-E

2804AT8-E

23.0

802BT-E

2244AT7

20.0

802BT-E

2804AT7

23.0

Indoor unit 2

Indoor unit 3

Outdoor unit

Model

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

characteristics

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Centrifugal

Fan unit

Standard air flow H/M/L

(m³/min.) 19.0/16.2/13.3 19.0/16.2/13.3 19.0/16.2/13.3 19.0/16.2/13.3

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

120

Sound pressure level

Sound power level

40 / 37 / 34

55 / 52 / 49

40 / 37 / 34

55 / 52 / 49

40 / 37 / 34

55 / 52 / 49

40 / 37 / 34

55 / 52 / 49

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 15 –

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1-1-6. CeilingType

Indoor unit 1

RAV-SM

(kW)

802CT-E

2244AT8-E

20.0

802CT-E

2804AT8-E

23.0

802CT-E

2244AT7

20.0

802CT-E

2804AT7

23.0

Indoor unit 2

Indoor unit 3

Outdoor unit

Model

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

characteristics

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Centrifugal

Fan unit

Standard air flow H/M/L

(m³/min.) 18.5/16.7/14.6 18.5/16.7/14.6 18.5/16.7/14.6 18.5/16.7/14.6

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

Sound pressure level

Sound power level

38 / 36 / 33

53 / 51 / 48

38 / 36 / 33

53 / 51 / 48

38 / 36 / 33

53 / 51 / 48

38 / 36 / 33

53 / 51 / 48

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 16 –

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1-1-7. High WallType

Indoor unit 1

RAV-SM

(kW)

802KRT-E

2244AT8-E

20.0

802KRT-E

2804AT8-E

23.0

802KRT-E

2244AT7

20.0

802KRT-E

2804AT7

23.0

Indoor unit 2

Indoor unit 3

Outdoor unit

Model

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

characteristics

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Cross flow fan Cross flow fan Cross flow fan Cross flow fan

(m³/min.) 18.5/14.6/12.2 18.5/14.6/12.2 18.5/14.6/12.2 18.5/14.6/12.2

Fan unit

Standard air flow H/M/L

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

Sound pressure level

Sound power level

45 / 41 / 36

60 / 56 / 51

45 / 41 / 36

60 / 56 / 51

45 / 41 / 36

60 / 56 / 51

45 / 41 / 36

60 / 56 / 51

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 17 –

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1-1-8. 4-Way CassetteType

Indoor unit 1

Indoor unit 2

RAV-SM

(kW)

564UT-E

2244AT8-E

20.0

804UT-E

2804AT8-E

23.0

564UT-E

2244AT7

20.0

804UT-E

2804AT7

23.0

Model

Indoor unit 3

Indoor unit 4

Outdoor unit

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

characteristics

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Turbo fan

Fan unit

Standard air flow H/M/L

(m³/min.) 17.5/14.5/13.0 20.5/16.0/13.5 17.5/14.5/13.0 20.5/16.0/13.5

Motor

H/M/L

(W)

(dB•A)

Outdoor unit

(m)

Sound pressure level

Sound power level

32 / 29 / 28

47 / 44 / 43

35 / 31 / 28

50 / 46 / 43

32 / 29 / 28

47 / 44 / 43

35 / 31 / 28

50 / 46 / 43

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

Outdoor unit – Pipe branch

Pipe branch – Indoor unit

Liquid side

Gas side

(mm)

12.7

Connecting pipe

(mm)

15.9

Liquid side

(mm)

9.5

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 18 –

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1-1-9. Compact 4-Way Cassette (600 × 600)Type

Indoor unit 1

Indoor unit 2

RAV-SM562MUT-E

RAV-SM2244AT8-E

20.0

RAV-SM562MUT-E

RAV-SM2244AT7

20.0

Model

Indoor unit 3

Indoor unit 4

Outdoor unit

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

(A)

Running current

Power consumption

Cooling Power factor

11.51 – 10.54

11.51

(kW)

7.12

(%)

EER

2.81

Energy efficiency class ∗

Running current

Power consumption

10.34 – 9.47

6.40

—

10.34

Electrical

characteristics

(A)

(kW)

(%)

6.40

Heating Power factor

COP

3.50

Energy efficiency class ∗

—

Maximum current

(A)

Fan

Turbo fan

13.3 / 11.2 / 9.1

Turbo fan

13.3 / 11.2 / 9.1

Fan unit

Standard air flow H/M/L

(m³/min.)

(W)

Motor

H/M/L

Sound pressure level

Sound power level

(dB•A)

Outdoor unit

(m)

43 / 39 / 34

58 / 54 / 49

43 / 39 / 34

58 / 54 / 49

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan

133

Propeller fan

133

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

100 + 100

28.6

100 + 100

28.6

Gas side

(mm)

(dB•A)

Outdoor unit –

First pipe branch

Liquid side

Gas side

12.7

15.9

First pipe branch –

Second pipe branch

Connecting pipe

Liquid side

Gas side

9.5

12.7

Second pipe branch –

Indoor unit

Liquid side

6.4

Sound pressure level

Sound power level

Cooling / Heating

56 / 57

72 / 74

56 / 57

72 / 74

∗ : IEC standard

– 19 –

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1-1-10. Slim DuctType

Indoor unit 1

Indoor unit 2

RAV-SM564SDT-E

RAV-SM2244AT8-E

20.0

RAV-SM564SDT-E

RAV-SM2244AT7

20.0

Model

Indoor unit 3

Indoor unit 4

Outdoor unit

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

(A)

Running current

Power consumption

Cooling Power factor

11.51 – 10.54

11.51

(kW)

7.12

(%)

EER

2.81

Energy efficiency class ∗

Running current

Power consumption

10.34 – 9.47

6.40

—

10.34

Electrical

characteristics

(A)

(kW)

(%)

6.40

Heating Power factor

COP

3.50

Energy efficiency class ∗

Maximum current

—

(A)

Fan

Centrifugal fan

13.0 / 11.3 / 9.7

Centrifugal fan

13.0 / 11.3 / 9.7

Standard air flow

Motor

H/M/L

(m³/min.)

(W)

Fan unit

Standard (at shipment)

(Pa)

Extermal

static pressure

Set up for tap exchange

(Pa)

(dB•A)

Outdoor unit

(m)

10 / 20 / 35 / 50

45 / 40 / 36

33 / 31 / 28

60 / 55 / 51

48 / 46 / 43

10 / 20 / 35 / 50

45 / 40 / 36

33 / 31 / 28

60 / 55 / 51

48 / 46 / 43

Under air inlet

H/M/L

Sound pressure level

Sound power level

Back air inlet

Under air inlet

Back air inlet

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Fan unit

Outdoor lower

Outdoor high

(m)

Propeller fan

133

Propeller fan

133

Standard air flow high

Motor

(m³/min.)

(W)

100 + 100

28.6

100 + 100

28.6

Gas side

(mm)

Outdoor unit –

First pipe branch

Liquid side

(mm)

15.9

12.7 12.7

15.9

Gas side

First pipe branch –

Second pipe branch

Connecting pipe

Liquid side

Gas side

(mm)

9.5

(mm)

12.7

Second pipe branch –

Indoor unit

Liquid side

(mm)

6.4

Sound pressure level

Sound power level

Cooling / Heating

(dB•A)

56 / 57

72 / 74

56 / 57

72 / 74

∗ : IEC standard

– 20 –

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1-1-11. DuctType

Indoor unit 1

RAV-SM

(kW)

562BT-E

2244AT8-E

20.0

802BT-E

2804AT8-E

23.0

562BT-E

2244AT7

20.0

802BT-E

2804AT7

23.0

Indoor unit 2

Indoor unit 3

Indoor unit 4

Outdoor unit

Model

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

characteristics

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Centrifugal

Fan unit

Standard air flow H/M/L

Motor

(m³/min.) 13.0/11.9/9.8 19.0/16.2/13.3 13.0/11.9/9.8 19.0/16.2/13.3

(W)

(dB•A)

Outdoor unit

(m)

120

Sound pressure level

Sound power level

H/M/L

40 / 37 / 33

55 / 52 / 48

40 / 37 / 34

55 / 52 / 49

40 / 37 / 33

55 / 52 / 48

40 / 37 / 34

55 / 52 / 49

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

(dB•A)

Outdoor unit –

First pipe branch

Liquid side

Gas side

12.7

15.9

First pipe branch –

Second pipe branch

Connecting pipe

Liquid side

Gas side

9.5

12.7

15.9

12.7

15.9

Second pipe branch –

Indoor unit

Liquid side

6.4

9.5

6.4

9.5

Sound pressure level

Sound power level

Cooling / Heating

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 21 –

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1-1-12. CeilingType

Indoor unit 1

RAV-SM

(kW)

562CT-E

2244AT8-E

20.0

802CT-E

2804AT8-E

23.0

562CT-E

2244AT7

20.0

802CT-E

2804AT7

23.0

Indoor unit 2

Indoor unit 3

Indoor unit 4

Outdoor unit

Model

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

characteristics

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Centrifugal

Fan unit

Standard air flow H/M/L

Motor

(m³/min.) 13.0/11.2/10.0 18.5/16.7/14.6 13.0/11.2/10.0 18.5/16.7/14.6

(W)

(dB•A)

Outdoor unit

(m)

Sound pressure level

Sound power level

H/M/L

36 / 33 / 30

51 / 48 / 45

38 / 36 / 33

53 / 51 / 48

36 / 33 / 30

51 / 48 / 45

38 / 36 / 33

53 / 51 / 48

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

(dB•A)

Outdoor unit –

First pipe branch

Liquid side

Gas side

12.7

15.9

First pipe branch –

Second pipe branch

Connecting pipe

Liquid side

Gas side

9.5

12.7

15.9

12.7

15.9

Second pipe branch –

Indoor unit

Liquid side

6.4

9.5

6.4

9.5

Sound pressure level

Sound power level

Cooling / Heating

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 22 –

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1-1-12. High WallType

Indoor unit 1

Indoor unit 2

RAV-SM

(kW)

562KRT-E

2244AT8-E

20.0

802KRT-E

2804AT8-E

23.0

562KRT-E

2244AT7

20.0

802KRT-E

2804AT7

23.0

Model

Indoor unit 3

Indoor unit 4

Outdoor unit

Cooling capacity

Heating capacity

Power supply

(kW)

22.4

27.0

22.4

27.0

3 phase 380 – 415V 50Hz

3 phase 380V 60Hz

Indoor unit

Running current

Power consumption

Cooling Power factor

(A) 11.51 – 10.54 15.44 – 14.13

11.51

7.12

15.44

9.55

(kW)

(%)

7.12

9.55

EER

2.81

2.41

2.81

—

2.41

—

Energy efficiency class ∗

Running current

Power consumption

Electrical

characteristics

(A) 10.34 – 9.47 12.80 – 11.72

10.34

6.40

12.80

7.92

(kW)

(%)

6.40

7.92

Heating Power factor

COP

3.50

3.41

3.50

—

3.41

—

Energy efficiency class ∗

Maximum current

(A)

Fan

Cross flow fan Cross flow fan Cross flow fan Cross flow fan

(m³/min.) 14.0/12.5/10.7 18.5/14.6/12.2 14.0/12.5/10.7 18.5/14.6/12.2

Fan unit

Standard air flow H/M/L

Motor

(W)

(dB•A)

Outdoor unit

(m)

Sound pressure level

Sound power level

H/M/L

39 / 36 / 33

54 / 51 / 48

45 / 41 / 36

60 / 56 / 51

39 / 36 / 33

54 / 51 / 48

45 / 41 / 36

60 / 56 / 51

Max. total length

7.5

Min. length

Height difference

Fan

(m)

Outer dimension

Outdoor lower

Outdoor high

(m)

Propeller fan Propeller fan Propeller fan Propeller fan

Fan unit

Standard air flow high

Motor

(m³/min.)

(W)

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

133

100 + 100

28.6

Gas side

(mm)

(dB•A)

Outdoor unit –

First pipe branch

Liquid side

Gas side

12.7

15.9

First pipe branch –

Second pipe branch

Connecting pipe

Liquid side

Gas side

9.5

12.7

Second pipe branch –

Indoor unit

Liquid side

6.4

9.5

6.4

9.5

Sound pressure level

Sound power level

Cooling / Heating

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

∗ : IEC standard

– 23 –

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1-2. Outdoor Unit

Model

Outdoor unit

RAV-SM 2244AT8-E 2804AT8-E

2244AT7

2804AT7

1 phase 380 – 415V 50Hz

1 phase 380V 60Hz

Power supply

(Power exclusive to outdoor is required.)

Type

Motor

Pole

Hermetic compressor Hermetic compressor

Compressor

(kW)

(kg)

3.75

Refrigerant charged

Refrigerant control

5.9

Pulse motor valve

Max. total length

Min. length

(m)

7.5

Pipe

Outdoor lower

Outdoor higher

(m)

Height difference

Height

(m)

(mm)

1540

900

320

1540

900

320

1540

900

320

1540

900

320

Outer dimension Width

Depth

Silky shade

(Muncel 1Y8.5/0.5)

Silky shade

(Muncel 1Y8.5/0.5)

Appearance

Total weight

Heat exchanger

Fan

(kg)

134

Finned tube

Propeller fan

134

Finned tube

Propeller fan

134

Fan unit

Standard air flow

Motor

(m³/min.)

(W)

133

100 + 100

19.1

133

100 + 100

19.1

100 + 100

19.1

100 + 100

19.1

Gas side

(mm)

(dB•A)

(°C)

Connecting pipe

(Outdoor unit side)

Liquid side

12.7

Sound pressure level

Sound power level

Cooling/Heating

56 / 57

72 / 74

57 / 58

74 / 75

56 / 57

72 / 74

57 / 58

74 / 75

Outside air temperature, Cooling

Outside air temperature, Heating

46 to –15°C

15 to –20°C

46 to –15°C

15 to –20°C

(°C)

– 24 –

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1-3. Operation Characteristic Curve

• Operation characteristic curve <Digital Inverter>

RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E

SM280

SM224

• Conditions

Indoor : DB27˚C/WB19˚C

Outdoor : DB35˚C

Air flow : High

Pipe length : 7.5m

400V, 50Hz (3 phase)

Indoor : DB20˚C

Outdoor : DB7˚C/WB6˚C

Air flow : High

Pipe length : 7.5m

400V, 50Hz (3 phase)

100

Compressor speed (rps)

RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG)

SM280

SM224

• Conditions

Indoor : DB27˚C/WB19˚C

Outdoor : DB35˚C

Air flow : High

Indoor : DB20˚C

Outdoor : DB7˚C/WB6˚C

Air flow : High

Pipe length : 7.5m

380V, 60Hz (3 phase)

Pipe length : 7.5m

380V, 60Hz (3 phase)

100

Compressor speed (rps)

– 25 –

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• Capacity variation ratio according to temperature

RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E

RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG)

105

100

120

110

100

• Conditions

Indoor : DB20˚C

Indoor air flow : High

Pipe length : 7.5m

Indoor : DB27˚C/WB19˚C

Indoor air flow : High

Pipe length : 7.5m

-20 -18 -16 -14 -12 -10 -8 -6 -4 -2

8 10

32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Outdoor temp. (˚C)

– 26 –

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2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)

2-1. Outdoor Unit

– 27 –

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RBC-DTWP101E (Simultaneous DoubleTwin)

Inner diameter

Ø C

Outer diameter

Ø25.4

Inner

diameter

Ø D

Inner

diameter

Ø D

Inner diameter

Ø28.6

1 pc.

Model

Q’ty

25.4

15.9

12.7

9.5

15.9

12.7

9.5

Gas side

RBC-DTWP101E

Liquid side

9.5

6.4

– 28 –

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RBC-TRP100E (SimultaneousTriple)

Header assembly

300

Inner diameter

Ø15.9

100

1 pc.

Branch pipe assembly

100

Inner diameter

Ø9.52

1 pc.

Insulator

Gas side socket

Liquid side socket

Outer diameter

Ø25.4

Ø15.9

Ø12.7

Ø9.5

Ø6.4

Ø9.5

Ø15.9

Ø25.4

Ø12.7

(External

diameter)

(External

diameter)

(External

diameter)

(External

diameter)

Inner

diameter

Ø28.6

3 pcs.

1 pc.

3 pcs.

1 pc.

– 29 –

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RBC-TWP101E (SimultaneousTwin)

Inner diameter

Ø C

Outer diameter

Ø25.4

Inner

diameter

Ø D

Inner

diameter

Ø D

Inner diameter

Ø28.6

1 pc.

Model

Q’ty

Gas side

Liquid side

25.4

12.7

15.9

9.5

RBC-TWP101E

– 30 –

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3. OUTDOOR UNIT REFRIGERANTING CYCLE DIAGRAM

RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E

RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG)

Solenoid valve

Check joint

High-pressure side

TO sensor

Pressure switch

Check

valve

Muffler

Ø45 × 230 L

TL sensor

4-way

valve

Check joint

Low-pressure side

TD sensor

TE sensor

Pressure

sensor

Distributor

Heat exchanger

Ø8, 2 rows, 60 stages + Ø9.5, 1 row, 60 stages

13-13 pass + under cool pass

TS sensor

PMV 1

Liquid tank

Ø45 × 420 L

Accumulator

(8500cc) Ø161.6

Packed valve

Ø12.7

PMV 2

Compressor

DA550A3F-11M

: Cooling

: Heating

: Strainer

Ball valve

Ø19.1

– 31 –

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Systematic diagram of refrigerating cycle

RAV-SM2244 series

Pressure

(MPa) (kg/cm²g) Discharge Suction

Pd Ps

3.14 0.88 32.0

Pipe surface temperature (°C)

Indoor/Outdoor

temp. conditions

(DB/WB) (°C)

Compressor

Indoor heat Outdoor heat drive revolution Indoor

frequency

exchanger

fan

(rps)

∗

(TD)

(TS)

(TC)

(TE)

Indoor

27/19

32/24

18/15.5

20/–

Outdoor

35/–

Standard

Cooling Overload

Low load

9.0

HIGH

LOW

HIGH

LOW

HIGH

3.54 1.14 36.1 11.6

43/–

1.65 0.65 16.8

2.60 0.67 26.5

6.6

6.8

–15/–

7/6

Standard

Heating Overload

Low load

3.24 1.08 33.1 11.0

2.05 0.31 20.9 3.2

–12

–11

30/–

24/18

–10/(70%)

15/–

∗ This compressor has a 4-pole motor.

The value when compressor frequency (Hz) is measured by a clamp meter is twice the compressor

revolution number (rps).

∗ This data is cycle data obtained by combining a four-way ceiling cassette simultaneous twin at a target pipe

length. Data will change depending on the mounted pipe length or combination with the indoor unit.

RAV-SM2804 series

Pressure

(MPa) (kg/cm²g) Discharge Suction

Pd Ps

3.15 0.79 32.1

Pipe surface temperature (°C)

Indoor/Outdoor

temp. conditions

(DB/WB) (°C)

Compressor

Indoor heat Outdoor heat drive revolution Indoor

frequency

exchanger

fan

(rps)

∗

(TD)

(TS)

(TC)

(TE)

Indoor

27/19

32/24

18/15.5

20/–

Outdoor

35/–

Standard

Cooling Overload

Low load

8.1

HIGH

LOW

HIGH

LOW

HIGH

3.62 1.12 36.9 11.4

43/–

1.66 0.64 16.9

2.85 0.63 29.1

6.5

6.4

–15/–

7/6

Standard

Heating Overload

Low load

3.26 1.06 33.3 10.8

2.05 0.29 20.9 3.0

–13

–12

30/–

24/18

–10/(70%)

15/–

∗ This compressor has a 4-pole motor.

The value when compressor frequency (Hz) is measured by a clamp meter is twice the compressor

revolution number (rps).

∗ This data is cycle data obtained by combining a four-way ceiling cassette simultaneous twin at a target pipe

length. Data will change depending on the mounted pipe length or combination with the indoor unit.

– 32 –

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4. WIRING DIAGRAM

4-1. Outdoor Unit

RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E

RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG)

Compressor

IPDU board

MCC-1596

Noise Filter

P.C. board

MCC-1600

Fan IPDU board

MCC-1597

Interface (CDB)

P.C. board

MCC-1436

MCC-1599

– 33 –

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5. SPECIFICATIONS OF ELECTRICAL PARTS

5-1. Outdoor Unit

RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E

RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG)

No.

Parts name

Type

DA550A3F-11M

ICF-280-A100-1

STF-01AJ502E1

VHV-01AH553A1

VPV-MOAJ524C0

VPV-MOAH551B1

UKV-25D22

ACB-4UB83W

CH-44

Specifications

Compressor

—

Outdoor fan motor

4-way valve coil

DC 280 V, 100 W

AC 220 – 240 V, 50 Hz

AC 220 V, 60 Hz

AC 220 – 240 V, 50 Hz

AC 220 V, 60 Hz

DC 12 V

4-way valve coil (for AT7)

2-way valve coil

2-way valve coil (for AT7)

PMV coil

High pressure switch

OFF : 4.15 MPa

1.4 mH, 25 A

18 mH, 5 A

Reactor

CH-68

Reactor

CH-56

5.8 mH, 18.5 A

—

P.C. board (Compressor drive)

P.C. board (Fan motor drive)

P.C. board (Control)

MCC-1596

MCC-1597

MCC-1599

MCC-1600

MCC-1436

—

P.C. board (Noise filter)

—

P.C. board (Fan extention)

Outdoor temp. sensor (TO sensor)

Discharge temp. sensor (TD sensor)

Suction temp. sensor (TS sensor)

Heat exchanger sensor (TE sensor)

Heat exchanger mid. temp. sensor (TL sensor)

Fuse

—

10 kΩ at 25°C

50 kΩ at 25°C

10 kΩ at 25°C

25 A, 250 V

—

TLC 25A

Fuse (Mounted on P.C. board, MCC-1596)

Fuse (Mounted on P.C. board, MCC-1597)

Fuse (Mounted on P.C. board, MCC-1599)

Fuse (Mounted on P.C. board, MCC-1600)

Relay

GAC1 31.5A

SCT 31.5A

GDM 250V 15A

SCT 31.5A

FJL 250V 31.5A

ET 6.3A

31.5 A, 500 V

T3.15 A, AC 250 V

15 A, 250 V

T3.15 A, AC 250 V

T6.3 A, AC 250 V

Contact : AC 480 V, 20A

100 Ω, 500 V

OFF : 125 ± 4 °C, ON : 60 ± 5 °C

EL200/240A2-F(M)

ZPR0YCE 101A 500

US-622

Posistor

Compressor thermo.

– 34 –

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6. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC

(R410A) which does not damage the ozone layer.

6. When an air conditioning system charged with a

large volume of refrigerant is installed in a small

room, it is necessary to exercise care so that,

even when refrigerant leaks, its concentration

does not exceed the marginal level.

The working pressure of the new refrigerant R410A

is 1.6 times higher than conventional refrigerant

(R22). The refrigerating oil is also changed in

accordance with change of refrigerant, so be careful

that water, dust, and existing refrigerant or

refrigerating oil are not entered in the refrigerant

cycle of the air conditioner using the new refrigerant

during installation work or servicing time.

If the refrigerant gas leakage occurs and its

concentration exceeds the marginal level, an

oxygen starvation accident may result.

7. Be sure to carry out installation or removal

according to the installation manual.

The next section describes the precautions for air

conditioner using the new refrigerant.

Improper installation may cause refrigeration

trouble, water leakage, electric shock, fire, etc.

Conforming to contents of the next section together

with the general cautions included in this manual,

perform the correct and safe work.

8. Unauthorized modifications to the air conditioner

may be dangerous. If a breakdown occurs

please call a qualified air conditioner technician

or electrician.

Improper repair may result in water leakage,

electric shock and fire, etc.

6-1. Safety During Installation/Servicing

As R410A’s pressure is about 1.6 times higher than

that of R22, improper installation/servicing may

cause a serious trouble. By using tools and

materials exclusive for R410A, it is necessary to

carry out installation/servicing safely while taking

the following precautions into consideration.

6-2. Refrigerant Piping Installation

6-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipes

and joints are mainly used.

1. Never use refrigerant other than R410A in an air

conditioner which is designed to operate with

R410A.

Copper pipes and joints suitable for the refrigerant

must be chosen and installed.

Furthermore, it is necessary to use clean copper

pipes and joints whose interior surfaces are less

affected by contaminants.

If other refrigerant than R410A is mixed,

pressure in the refrigeration cycle becomes

abnormally high, and it may cause personal

injury, etc. by a rupture.

1. Copper Pipes

2. Confirm the used refrigerant name, and use

tools and materials exclusive for the refrigerant

R410A.

It is necessary to use seamless copper pipes

which are made of either copper or copper alloy

and it is desirable that the amount of residual oil

is less than 40 mg/10 m.

The refrigerant name R410A is indicated on the

visible place of the outdoor unit of the air

conditioner using R410A as refrigerant.

Do not use copper pipes having a collapsed,

deformed or discolored portion (especially on

the interior surface).

To prevent mischarging, the diameter of the

service port differs from that of R22.

Otherwise, the expansion valve or capillary tube

may become blocked with contaminants.

3. If a refrigeration gas leakage occurs during

installation/servicing, be sure to ventilate fully.

As an air conditioner using R410A incurs pres-

sure higher than when using R22, it is necessary

to choose adequate materials.

If the refrigerant gas comes into contact with fire,

a poisonous gas may occur.

4. When installing or removing an air conditioner,

do not allow air or moisture to remain in the

refrigeration cycle.

Thicknesses of copper pipes used with R410A

are as shown in Table 6-2-1. Never use copper

pipes thinner than 0.8mm even when it is avail-

able on the market.

Otherwise, pressure in the refrigeration cycle

may become abnormally high so that a rupture

or personal injury may be caused.

5. After completion of installation work, check to

make sure that there is no refrigeration gas

leakage.

NOTE

Refer to the “6-6. Instructions for Re-use Piping

of R22 or R407C”.

If the refrigerant gas leaks into the room, coming

into contact with fire in the fan-driven heater,

space heater, etc., a poisonous gas may occur.

– 35 –

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Table 6-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

Outer diameter (mm)

R410A

0.80

R22

0.80

1.00

1/4

3/8

1/2

5/8

6.4

9.5

0.80

12.7

15.9

0.80

1.00

1. Joints

For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.

a) Flare Joints

Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds

20 mm. In such a case, socket joints can be used.

Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 6-2-3 to 6-2-5 below.

b) Socket Joints

Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose

diameter is larger than 20 mm. Thicknesses of socket joints are as shown in Table 6-2-2.

Table 6-2-2 Minimum thicknesses of socket joints

Reference outer diameter of

copper pipe jointed (mm)

Minimum joint thickness

(mm)

Nominal diameter

1/4

3/8

1/2

5/8

6.4

9.5

0.50

0.60

0.70

0.80

12.7

15.9

6-2-2. Processing of Piping Materials

When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not

enter the pipe interior, that no other oil other than lubricating oils used in the installed air conditioner is used,

and that refrigerant does not leak.

When using lubricating oils in the piping processing, use such lubricating oils whose water content has been

removed. When stored, be sure to seal the container with an airtight cap or any other cover.

1. Flare Processing Procedures and Precautions

a) Cutting the Pipe

By means of a pipe cutter, slowly cut the pipe so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs, refrigerant leakage may occur.

Carefully remove all burrs and clean the cut surface before installation.

– 36 –

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c) Insertion of Flare Nut

d) Flare Processing

Make certain that a clamp bar and copper pipe have been cleaned.

By means of the clamp bar, perform the flare processing correctly.

Use either a flare tool for R410A or conventional flare tool.

ØD

Flare processing dimensions differ according

to the type of flare tool.

When using a conventional flare tool, be sure

to secure “dimension A” by using a gauge for

size adjustment.

Fig. 6-2-1 Flare processing dimensions

Table 6-2-3 Dimensions related to flare processing for R410A / R22

A (mm)

Outer

diameter

(mm)

Nominal

diameter

Thickness

(mm)

Conventional flare tool

(R410A)

Conventional flare tool

(R22)

Flare tool for

R410A, R22

clutch type

Clutch type Wing nut type Clutch type Wing nut type

1/4

3/8

1/2

5/8

3/4

6.4

9.5

0.8

1.0

1.2

0 to 0.5

1.0 to 1.5

1.5 to 2.0

2.0 to 2.5

0.5 to 1.0

—

1.0 to 1.5

1.5 to 2.0

—

12.7

15.9

19.1

Table 6-2-4 Flare and flare nut dimensions for R410A

Dimension (mm)

Nominal

diameter

Outer diameter

Thickness

(mm)

Flare nut width

(mm)

1/4

3/8

1/2

5/8

3/4

6.4

9.5

0.8

1.0

1.2

9.1

9.2

6.5

13.2

16.6

19.7

24.0

13.5

16.0

19.0

—

9.7

12.7

15.9

19.1

12.9

16.0

19.2

Table 6-2-5 Flare and flare nut dimensions for R22

Dimension (mm)

Nominal

diameter

Outer diameter

Thickness

(mm)

Flare nut width

(mm)

1/4

3/8

1/2

5/8

3/4

6.4

9.5

0.8

1.0

9.1

9.2

6.5

13.0

16.2

19.4

23.3

13.5

16.0

19.0

24.0

9.7

12.7

15.9

19.1

12.9

16.0

19.2

– 37 –

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Fig. 6-2-2 Relations between flare nut and flare seal surface

2. Flare Connecting Procedures and Precautions

a) Make sure that the flare and union portions do not have any scar or dust, etc.

b) Correctly align the processed flare surface with the union axis.

c) Tighten the flare with designated torque by means of a torque wrench.

The tightening torque for R410A is the same as that for conventional R22.

Incidentally, when the torque is weak, the gas leakage may occur.

When it is strong, the flare nut may crack and may be made non-removable.

When choosing the tightening torque, comply with values designated by manufacturers.

Table 6-2-6 shows reference values.

NOTE

When applying oil to the flare surface, be sure to use oil designated by the manufacturer.

If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.

Table 6-2-6 Tightening torque of flare for R410A [Reference values]

Tightening torque of torque

wrenches available on the market

N•m (kgf•m)

Nominal

diameter

Outer diameter

(mm)

Tightening torque

N•m (kgf•m)

1/4

3/8

1/2

5/8

3/4

6.4

9.5

14 to 18 (1.4 to 1.8)

33 to 42 (3.3 to 4.2)

50 to 62 (5.0 to 6.2)

63 to 77 (6.3 to 7.7)

100 to 120 (10.0 to 12.0)

16 (1.6), 18 (1.8)

42 (4.2)

12.7

15.9

19.1

55 (5.5)

65 (6.5)

——

– 38 –

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6-3. Tools

6-3-1. RequiredTools

Refer to the “4.Tools” (Page 8)

6-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the

following steps.

Recover the refrigerant, and check no refrigerant

remains in the equipment.

When the compound gauge’s pointer has indicated

–0.1 Mpa (–76 cmHg), place the handle Low in the

fully closed position, and turn off the vacuum pump’s

power switch.

Connect the charge hose to packed valve service

port at the outdoor unit’s gas side.

Keep the status as it is for 1 to 2 minutes, and ensure

that the compound gauge’s pointer does not return.

Connect the charge hose of the vacuum pump

adapter.

Set the refrigerant cylinder to the electronic balance,

connect the connecting hose to the cylinder and the

connecting port of the electronic balance, and charge

liquid refrigerant.

Open fully both packed valves at liquid and gas

sides.

Place the handle of the gauge manifold Low in the

fully opened position, and turn on the vacuum pump’s

power switch. Then, evacuating the refrigerant in the

cycle.

(For refrigerant charging, see the figure below.)

1) Never charge refrigerant exceeding the specified amount.

2) If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.

3) Do not carry out additional charging.

When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the refrigera-

tion cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specified amount is

charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, and may cause a

rupture or personal injury.

(INDOOR unit)

(Liquid side)

(OUTDOOR unit)

Opened

Closed

(Gas side)

Refrigerant cylinder

(With siphon pipe)

Check valve

Open/Close valve

for charging

Service port

Electronic balance for refrigerant charging

Fig. 6-4-1 Configuration of refrigerant charging

– 39 –

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1) Be sure to make setting so that liquid can be charged.

2) When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.

Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the

cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ]

[ Cylinder without siphon ]

Gauge manifold

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

Siphon

R410A refrigerant is HFC mixed refrigerant.

Therefore, if it is charged with gas, the composition

of the charged refrigerant changes and the

characteristics of the equipment varies.

Fig. 6-4-2

6-5. Brazing of Pipes

6-5-1. Materials for Brazing

1. Silver brazing filler

1) Phosphor bronze brazing filler tends to react with

sulfur and produce a fragile compound water

solution, which may cause a gas leakage.

Therefore, use any other type of brazing filler at

a hot spring resort, etc., and coat the surface

with a paint.

Silver brazing filler is an alloy mainly composed

of silver and copper.

It is used to join iron, copper or copper alloy, and

is relatively expensive though it excels in solder-

ability.

2) When performing brazing again at time of

servicing, use the same type of brazing filler.

2. Phosphor bronze brazing filler

6-5-2. Flux

Phosphor bronze brazing filler is generally used

to join copper or copper alloy.

1. Reason why flux is necessary

• By removing the oxide film and any foreign

matter on the metal surface, it assists the flow

of brazing filler.

3. Low temperature brazing filler

Low temperature brazing filler is generally called

solder, and is an alloy of tin and lead.

• In the brazing process, it prevents the metal

surface from being oxidized.

Since it is weak in adhesive strength, do not use

it for refrigerant pipes.

• By reducing the brazing filler's surface tension,

the brazing filler adheres better to the treated

metal.

– 40 –

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2. Characteristics required for flux

6-5-3. Brazing

• Activated temperature of flux coincides with

the brazing temperature.

As brazing work requires sophisticated techniques,

experiences based upon a theoretical knowledge, it

must be performed by a person qualified.

• Due to a wide effective temperature range, flux

is hard to carbonize.

In order to prevent the oxide film from occurring in

the pipe interior during brazing, it is effective to

proceed with brazing while letting dry Nitrogen gas

flow.

• It is easy to remove slag after brazing.

• The corrosive action to the treated metal and

brazing filler is minimum.

• It excels in coating performance and is

harmless to the human body.

Never use gas other than Nitrogen gas.

1. Brazing method to prevent oxidation

As the flux works in a complicated manner as

described above, it is necessary to select an

adequate type of flux according to the type and

shape of treated metal, type of brazing filler and

brazing method, etc.

1) Attach a reducing valve and a flow-meter to

the Nitrogen gas cylinder.

2) Use a copper pipe to direct the piping

material, and attach a flow-meter to the

cylinder.

3. Types of flux

• Noncorrosive flux

Generally, it is a compound of borax and boric

acid.

3) Apply a seal onto the clearance between the

piping material and inserted copper pipe for

Nitrogen in order to prevent backflow of the

Nitrogen gas.

It is effective in case where the brazing

temperature is higher than 800°C.

4) When the Nitrogen gas is flowing, be sure to

keep the piping end open.

• Activated flux

Most of fluxes generally used for silver brazing

are this type.

5) Adjust the flow rate of Nitrogen gas so that it

is lower than 0.05 m³/Hr or 0.02 MPa

It features an increased oxide film removing

capability due to the addition of compounds

such as potassium fluoride, potassium chloride

and sodium fluoride to the borax-boric acid

compound.

(0.2kgf/cm²) by means of the reducing valve.

6) After performing the steps above, keep the

Nitrogen gas flowing until the pipe cools down

to a certain extent (temperature at which

pipes are touchable with hands).

7) Remove the flux completely after brazing.

4. Piping materials for brazing and used

brazing filler/flux

Piping material Used brazing filler

Used flux

Do not use

Paste flux

Vapor flux

Copper - Copper

Copper - Iron

Iron - Iron

Phosphor copper

Silver

Flow meter

Silver

Stop valve

Nitrogen gas

cylinder

1) Do not enter flux into the refrigeration cycle.

From Nitrogen cylinder

2) When chlorine contained in the flux remains

within the pipe, the lubricating oil deteriorates.

Therefore, use a flux which does not contain

chlorine.

Pipe

Nitrogen

gas

3) When adding water to the flux, use water which

does not contain chlorine

Rubber plug

(e.g. distilled water or ion-exchange water).

4) Remove the flux after brazing.

Fig. 6-5-1 Prevention of oxidation during brazing

– 41 –

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6-6. Instructions for Re-use Piping of R22 or R407C

5. A dryer on the market is attached to the existing pipes.

Instruction of Works:

The existing R22 and R407C piping can be

reused for our digital inverter R410A products

installations.

• There is possibility that copper green rust

generated.

6. Check the oil when the existing air conditioner was

removed after refrigerant had been recovered.

In this case, if the oil is judged as clearly different

compared with normal oil

WARNING

Confirming the existence of scratches or dents on the

existing pipes and confirming the reliability of the pipe

strength are conventionally referred to the local site.

• The refrigerator oil is copper rust green :

There is possibility that moisture is mixed with the

oil and rust generates inside of the pipe.

If the definite conditions can be cleared,

it is possible to update the existing R22 and

R407C pipes to those for R410A models.

• There is discolored oil, a large quantity of the

remains, or bad smell.

• A large quantity of sparkle remained wear-out

powder is observed in the refrigerator oil.

6-6-1. Basic Conditions Needed to Reuse the

Existing Pipe

Check and observe three conditions of the refrigerant

piping works.

7. The air conditioner which compressor was ex-

changed due to a faulty compressor.

When the discolored oil, a large quantity of the

remains, mixture of foreign matter, or a large

quantity of sparkle remained wear-out powder is

observed, the cause of trouble will occur.

1. Dry

(There is no moisture inside of the pipes.)

2. Clean (There is no dust inside of the pipes.)

3. Tight (There is no refrigerant leak.)

8. Installation and removal of the air conditioner are

repeated with temporary installation by lease and etc.

6-6-2. Restricted Items to Use the Existing Pipes

9. In case that type of the refrigerator oil of the

existing air conditioner is other than the following oil

(Mineral oil), Suniso, Freol-S, MS (Synthetic oil),

alkyl benzene (HAB, Barrel-freeze), ester series,

PVE only of ether series.

In the following cases, the existing pipes cannot be

reused as they are. Clean the existing pipes or

exchange them with new pipes.

1. When a scratch or dent is heavy, be sure to use the

new pipes for the works.

• Winding-insulation of the compressor may

become inferior.

2. When the thickness of the existing pipe is thinner

than the specified “Pipe diameter and thickness” be

sure to use the new pipes for the works.

NOTE

The above descriptions are results of confirmation by our

company and they are views on our air conditioners, but

they do not guarantee the use of the existing pipes of the

air conditioner that adopted R410A in other companies.

• The operating pressure of R410A is high

(1.6 times of R22 and R407C). If there is a scratch

or dent on the pipe or thinner pipe is used, the

pressure strength is poor and may cause break-

age of the pipe at the worst.

6-6-3. Branching Pipe for Simultaneous

Operation System

∗ Pipe diameter and thickness (mm)

Reference outside

diameter (mm)

Wall thickness

(mm)

• In the concurrent twin system, when TOSHIBA-

specified branching pipe is used, it can be reused.

Branching pipe model name:

RBC-TWP30E-2, RBC-TWP50E-2, RBC-TRP100E

On the existing air conditioner for simultaneous

operation system (twin system), there is a case of

using branch pipe that has insufficient compressive

strength. In this case please change it to the branch

pipe for R410A.

Material

6.4

9.5

0.8

1.0

1.2

1.0

—

12.7

15.9

19.1

22.2

28.6

—

Half hard

6-6-4. Curing of Pipes

When removing and opening the indoor unit or outdoor

unit for a long time, cure the pipes as follows:

• In case that the pipe diameter is Ø12.7 mm or less

and the thickness is less than 0.7 mm, be sure to

use the new pipes for works.

• Otherwise rust may generate when moisture or

foreign matter due to dewing enters in the pipes.

3. The pipes are left as coming out or gas leaks.

(Poor refrigerant)

• The rust cannot be removed by cleaning, and a new

piping work is necessary.

• There is possibility that rain water or air including

moisture enters in the pipe.

4. Refrigerant recovery is impossible.

(Refrigerant recovery by the pump-down operation

on the existing air conditioner)

Place position

Term

Curing manner

1 month or more

Less than 1 month

Every time

Pinching

Outdoors

Indoors

• There is possibility that a large quantity of poor

oil or moisture remains inside of the pipe.

Pinching or taping

– 42 –

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6-6-5. Final Installation Checks

Is there no scratch or dent on the existing pipes?

Existing pipe: NO * Use a new pipes.

Is it possible to operate the existing air conditioner?

YES

∗ After the existing air conditioner operated in cooling mode

for approx. 30 minutes or longer*, recover the refrigerant.

∗ For cooling the pipes and recovering of oil

• Refrigerant recovery: Pump down method

Nitrogen gas pressure 0.5 Mpa

∗ Remove the existing air conditioner from the piping and

carry out flashing (nitrogen pressure 0.5 Mpa) to remove

the remains inside of the pipe.

Note] In case of twin, also be sure to flash the

branching pipe.

(If there is discharge of remains,

it is judged that there is a large quantity of remains.)

Was not largely discolored oil or

a large quantity of remains discharged?

(When the oil deteriorates, the color of the

oil changes to muddy and black color.)

Clean the pipes or use the new pipes.

If you are in trouble of

pipe cleaning, please contact us.

YES

ꢀ Connect the indoor/outdoor units to the existing pipe.

• Use a flare nut attached to the main unit for the

indoor/outdoor units.

(Do not use the flare nut of the existing pipe.)

• Re-machine the flare machining size to size for R410A.

Piping necessary to change the flare nut/

machining size due to pipe compression.

ꢀ When using a Ø19.1 mm pipe for the gas pipe of the first

branching pipe machining size due to pipe compression.

1) Flare nut width: H

(mm)

Ø12.7 Ø15.9 Ø19.1

→ Turn the existing pipe switch on the cycle control

Copper pipe

P.C. board of the outdoor unit to ON side.

Ø6.4

Ø9.5

outer dia.

At shipment from factory OFF → ON for existing pipe

(Refer to the table below.)

(Be sure to set the contents in the table below in order

to restrict the refrigerating cycle pressure of the

equipment in the pipe standard.)

For R410A

Same

For R22

Same as above

as above

2) Flare machining size: A

(mm)

Existing pipe SW

Copper pipe

Ø6.4

Ø9.5

13.2

13.0

Ø12.7 Ø15.9 Ø19.1

outer dia.

Switch

9.1

9.0

16.6

16.2

19.7

19.4

24.0

23.3

For R410A

For R22

Bit 3 of SW802 → ON

Becomes large a little for R410A

Do not apply the refrigerator oil to the flare surface.

∗ (Airtight test), Vacuum dry, Refrigerant charge,

Gas leak check

Trial run

– 43 –

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• When using a Ø19.1 mm gas pipe for the existing

piping, set bit 3 of SW802 (switch for existing pipe)

on the P.C. board of the outdoor unit to ON.

6-6-6. Handling of Existing Pipe

When using the existing pipe, carefully check it for

the following:

In this case, the heating performance may be

reduced depending on the outside air temperature

and room temperature.

• Wall thickness (within the specified range)

• Scratches and dents

• Water, oil, dirt, or dust in the pipe

• Flare looseness and leakage from welds

• Deterioration of copper pipe and heat insulator

SW802

When shipped from factory

When using existing pipe

• Before recovering the refrigerant in the existing

system, perform a cooling operation for at least 30

minutes.

2 3 4

Cautions for using existing pipe

• Do not reuse a flare nut to prevent gas leaks.

Replace it with the supplied flare nut and then

process it to a flare.

• Blow nitrogen gas or use an appropriate means to

keep the inside of the pipe clean.

6-6-7. Recovering Refrigerant

Use the refrigerant recovery equipment to recover

the refrigerant.

If discolored oil or much residue is discharged,

wash the pipe.

• Check welds, if any, on the pipe for gas leaks.

• There may be a problem with the pressure resis-

tance of the branching pipes of the existing piping.

Replace them with branch pipes (sold separately).

When the pipe corresponds to any of the following,

do not use it. Install a new pipe instead.

• The pipe has been opened (disconnected from

indoor unit or outdoor unit) for a long period.

• The pipe has been connected to an outdoor unit

that does not use refrigerant R22, R410A or R407C.

• The existing pipe must have a wall thickness equal

to or larger than the following thicknesses.

Reference outside

diameter (mm)

Wall thickness

(mm)

Material

6.4

0.8

1.0

1.2

1.0

—

9.5

—

12.7

15.9

19.1

22.2

28.6

—

Half hard

• Do not use any pipe with a wall thickness less than

these thicknesses due to insufficient pressure

capacity.

– 44 –

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7. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS

7-1. Outdoor Unit Control

7-1-1. Print Circuit Board, MCC-1596 (Compressor IPDU)

CN851 (Red)

Connector for MCC-1597 (CN505)

CN07 (Blue), CN08 (Blue)

Terminal for reactor CH44

CN101 (White)

Connector for MCC-1597 (CN502)

CN03 (Black)

Terminal for power relay

F02

Electric circuit protective fuse

(500V, 31.5A)

CN02 (White)

Terminal for MCC-1600 (CN17)

F01

Electric circuit protective fuse

(500V, 31.5A)

CN01 (Red)

Terminal for power relay

CN04 (Red)

Terminal for PTC thermistor

CN201 (Red), CN202 (White), CN203 (Black)

Compressor output terminal

CN09 (Yellow), CN10 (Yellow)

Terminal for reactor CH44

– 45 –

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7-1-2. Print Circuit Board, MCC-1597 (Fan Motor IPDU)

CN750 (White)

Fan motor output (Upper side)

CN700 (Blue)

Connector for MCC-1436 (CN03 or CN07)

CN500 (Red)

Connector for MCC-1600 (CN23)

and reactor CH68

CN504 (Blue)

Connector for MCC-1599

(CN802)

CN602 (Black)

Connector for MCC-1600 (CN51)

F500

Electric circuit protective fuse

(250V, 15A)

P501 (Black)

Lead wire for grounding

CN505 (Red)

Connector for MCC-1596 (CN851)

CN502 (White)

Connector for MCC-1596 (CN101)

– 46 –

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7-1-3. Print Circuit Board, MCC-1599 (Interface (CDB))

CN708 (Blue)

Connector for power relay coil

CN608 (White)

Connector for MCC-1600 (CN50)

CN02 (Red)

Connector for

MCC-1600 (CN10 and CN19)

CN802 (White)

Connector for MCC-1597 (CN504)

CN702 (White)

2-way valve connector

F01

CN700 (Yellow)

4-way valve connector

Power supply protective fuse

(250V, 3.15A)

Temp.sensor connector

CN604 (White) TL sensor

CN603 (White) TD sensor

CN602 (Yellow) TO sensor

CN601 (White) TE sensor

CN600 (White) TS sensor

Specific operation switch

SW801

SW804

SW805

SW806

Display select switch

SW800

SW803

Initial setting switch

SW802

Power-ON,error display LED

D800 to D804 (Yellow)

D805 (Green)

Indoor/Outdoor communication

signal LED

D503 (Green), (Outdoor → Indoor)

D502 (Orange), (Indoor → Outdoor)

CN690 (Green)

High-pressure

switch connector

CN609 (Blue)

Case thermostat

connector

CN606 (White)

Low-pressure

sensor connector

CN711 (White)

PMV2 Connector

CN704 (Blue)

Compressor ON

out put connector

CN610 (Yellow)

Outside input connector

CN710 (White)

PMV1 Connector

CN01 (White)

Inter-unit cable connector

– 47 –

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7-1-4. Print Circuit Board, MCC-1600 (Noise Filter)

CN05 (Red)

CN16 (Red)

CN10 (Red)

Power supply terminal (L1)

erminal for power relay

erminal for MCC-1599 (CN02) and Terminal for PTC thermistor

F01

aristor protective fuse

(250V, 6.3A)

CN06 (White)

Power supply terminal (L2)

CN17 (White)

erminal for

F02

MCC-1596 (CN02)

Varistor protective fuse

(250V, 6.3A)

CN18 (Black)

erminal for

power relay

CN07 (Black)

Power supply terminal (L3)

CN19 (Gray)

erminal for

MCC-1599 (CN02)

F03

aristor protective fuse

CN09 (Brown)

(250V, 6.3A)

erminal for

grounding

CN20 (White)

CN23 (Red)

Power supply terminal (L2)

Connector for

MCC-1597 (CN500)

CN08 (Gray)

eutral terminal

CN51 (Black)

onnector for

MCC-1597 (CN602)

CN50 (White)

onnector for

MCC-1599 (CN608)

– 48 –

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7-2. Outline of Main Controls

1. PMV (Pulse Motor Valve) control

1) The aperture of the PMV (1, 2) is controlled between 88 (44 + 44) to 1000 (500 + 500) pulses during

operation.

2) During cooling and heating operations, the PMV aperture is controlled by the temperature difference

between a detected temperature from a TS sensor and a saturation temperature equivalent value

(TU temperature) from a Ps sensor. (SH control).

3) The temperature difference in 2) in both cooling and heating operations is usually controlled using a 5K

target value.

(However control may be performed within a range of 1 – 15K depending on operating conditions).

4) When the cycle overheats during both cooling and heating operations, the PMV aperture is controlled

using a detection value from a TD sensor.

The normal target value is 96°C for cooling operations and 102°C for heating operations.

CAUTION

Sensor malfunction may cause liquid back-flow or error overheating in the compressor resulting in dramatic

reduction in the durable life of the compressor.

In the event of malfunction and repair of the compressor, restart operation after checking that there are no

errors in the resistance values or the refrigerating cycle of each sensor.

2. Discharge temperature release control

TD (˚C)

1) This control lowers the revolution number of the

Abnormal stop

compressor in the event that the discharge

([P03] is displayed with count 4 of errors)

115

temperature is not reduced or in the event the

discharge temperature increases rapidly during

PMV control.

Frequency normal down

113

The cycle is stabilized by dividing compressor

revolution number control into units up to 0.6 rps.

Frequency slow down

2) When the detected discharge temperature is in

an error zone, compressor operation is stopped

and then restarted after 2 minutes 30 seconds.

105

102

Frequency hold

An error count is added on each occasion the

error zone is detected and when the error is

detected 4 times, a “P03” error is performed.

Frequency slow up (Until command)

When normal operation continues for a period of

10 minutes, the error count is cleared.

According to command

– 49 –

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3. Outdoor fan revolution number control

Control of fan revolution number and the fan taps in this unit are shown below.

Fan Taps Revolution number Allocation [rpm]

W1 W2 W3 W4 W5 W6 W7 W8 W9 WA WB WC WD WE WF

Upper Fan 250 280 280 310 340 400 460 520 580 640 710 760 830 860 920

Lower Fan 250 270 300 350 410 470 530 590 640 710 770 810 850

Upper Fan 250 280 280 340 400 460 520 580 640 710 760 830 860 920 940

Lower Fan 250 300 350 410 470 530 590 640 710 770 810 850 920

SM224

SM280

3-1. Cooling fan control

1) Cooling operations of the outdoor fan are controlled by a TL sensor, TO sensor and the compressor

revolution number. Control is performed per 1 tap of DC fan control.

The outdoor fan is controlled by every 1 tap of DC fan control (14 taps).

During startup, operation is fixed for 60 seconds to a maximum fan tap corresponding to the zones

shown in the table below.Thereafter fan tap is controlled by a temperature outputted from the TL sensor.

45 rps or more

and less than 60 rps

TL (˚C)

Less than 45 rps

60 rps or more

Min.

Max.

Min.

Max.

Min.

Max.

WF tap

38°C ≤ TO

29°C ≤ TO < 38°C

15 ≤ TO < 29°C

5 ≤ TO < 15°C

0 ≤ TO < 5°C

–5 ≤ TO < 0°C

TO < –5°C

+1 tap / 20 sec.

Until Maximum rps

in each zone

(

)

Revolution number HOLD

–1 tap / 20 sec.

Until Minimum rps

(

)

TO error

in each zone

3-2 Heating fan control

1) Heating operations of the outdoor fan are controlled by a TE sensor, TO sensor and the compressor

revolution number.

(Control from a minimum W1 to a maximum is performed according to the table below).

2) Operation is fixed for 3 minutes after start up by a maximum fan tap corresponding to the zones in the

table below. Thereafter fan control is performed using the temperature from the TE sensor.

3) When TE ≥ 24°C continues for 5 minutes, the compressor is stopped. The compressor is placed in

the same state as a normal thermostat OFF without an error display.

The compressor is restarted after approximately 2 minutes 30 seconds and such interrupted operation

does not constitute an error. When the operation in 3) above is frequently performed, the filter of the

intake section of the indoor unit may require cleaning.

Therefore restart operation after cleaning the filter.

TE (˚C)

–2 taps / 20 sec.

Stop timer count

(Until W1)

Less than

45 rps

45 rps or more

60 rps

and less than 60 rps

or more

–2 taps / 20 sec.

10°C ≤ TO

(Until W1)

5 ≤ TO < 10°C

–3 ≤ TO < 5°C

–10 ≤ TO < –3°C

TO < –10°C

TO error

–1 tap / 20 sec.

(Until W1)

Maximum

Revolution number HOLD

+1 tap / 20 sec.

– 50 –

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4. Defrost control

1) During heating operations, defrost operations are performed when the temperature from the TE sensor

satisfies any of the conditions in the A to D zones.

2) During defrosting operations, defrost will be terminated if the temperature from the TE sensor continues

at 12°C or higher for 3 seconds or if the temperature is 7°C ≤ TE < 12°C for 1 minute.

Furthermore the defrost operation will be terminated if defrosting operations have continued for

10 minutes even if TE sensor temperature is less than 7°C.

3) After defrost operations have been reset, the compressor restarts heating operations without stopping.

Start warming operation

90 [min.]

TE [˚C]

–2

–5

–10

–18

A zone

B zone

C zone

D zone

∗

∗ The minimum TE value during 10 and 15 minutes after starting heating operation is stored as TEO.

WhenTo is normal

WhenTo is abnormal

A Zone

B Zone

C Zone

D Zone

Status [(TEO-TE) – (ToO-To) ≥ 3°C] continues for 20 seconds

Status [(TEO-TE) – (ToO-To) ≥ 2°C] continues for 20 seconds

Status [TEO- TE ≥ 3°C] continues for 20 seconds

Status [TEO-TE ≥ 2°C] continues for 20 seconds

Status [TE ≤ 23°C] continues for 20 seconds

When compressor operation status TE < 2°C is calculated for d minutes

4) The above time of d can be changed by selecting jumper [J805] or [J806].

(Setting at shipment; 90 minutes)

J805

J806

150 minutes

90 minutes (Setting at shipment)

60 minutes

30 minutes

: Short-circuit, : Open

5. Short interrupted operation preventive control

1) Even when a thermostat OFF signal is received from the indoor unit, the compressor may not stop

during an 8 minute period after startup in order to protect the compressor.

This operation is not an error condition.

2) When operation is terminated by using a remote controller, operation will not continue.

6. Electrical current release control

An AC current detection value from T611 on the IPDU control board is used to suppress the revolution

number of the compressor so that the input current of the inverter does not exceed a specified value.

A Zone

D Zone

B Zone

Normal operation.

Current (A)

Maintain frequency of current operation.

Reduce operating frequency.

B zone

Cease reduction of operating frequency

and maintain frequency of current operation.

C Zone

D zone

C zone

SM224Type

SM280Type

l1–0.5

l1 value (A)

15.7

17.6

A zone

– 51 –

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7. Heat sink temperature detection control

1) IGBT overheating prevention is protective control performed by a thermistor (TH sensor) in proximity to IGBT.

2) When a temperature of TH ≥ 83°C is detected, the fan tap is moved by 1 step up.

Thereafter step-up is performed at a rate of +1 tap/5 seconds until a maximum fan tap is reached.

3) After 2) above, operation is returned to normal fan control at a temperature of TH < 78°C.

4) Operation of the compressor is terminated at a temperature of TH ≥ 100°C.

5) Operation is restarted after 2 minutes and 30 seconds using [1] as the error count. However a count of

[4] in the same operation confirms an error. The error display is “P07” (Restart will not be performed).

∗ When error is confirmed, this may be an error caused by heat build-up or blower fan failure in the outdoor

unit, or an error in the IPDU board.

The correction is based on the table below:

8. Electrical current release value shift control

1) This control is for the purpose of preventing

malfunction of the compressor or electronic

components such as the IGBT of the inverter in

the compressor drive system during cooling

operations.

Temp. range

50°C ≤ TO

SM224

9.0

SM280

9.0

47°C ≤ TO < 50°C

44°C ≤ TO < 47°C

TO < 44°C

11.0

14.0

15.7

9.0

11.0

14.0

17.6

9.0

2) Select the current release control value (I1) by

TO sensor value from the right table.

TO error

9. Over-current protective control

1) Operation of the compressor is stopped when the over-current protective circuit detects an error current.

2) The compressor restarts after 2 minutes 30 seconds using [1] as an error count.

After restart, the error count is cleared when operation continues for 6 minutes or more.

3) An error is confirmed when the error count takes a value of [8].

4) For the indicated contents of error, confirm using the check code table.

10. High-pressure switch/Compressor case thermostat control

1) When the high-pressure switch or the compressor case thermostat operates, the operation of the

compressor is terminated.

2) The compressor restarts after 2 minutes 30 seconds using [1] as an error count.

After restart, the error count is cleared when operation continues for 10 minutes or more.

3) An error is confirmed with the error count [10].

4) For the indicated contents of error, confirm using the check code table.

11. High-pressure release control

1) The operation frequency is controlled to restrain abnormal rising of high pressure by TL sensor in

cooling operation and TC sensor in heating operation.

2) When TL sensor in cooling operation or TC sensor in heating operation detects abnormal temperature of

the stop zone, stop the compressor and the error count becomes +1.

3) When the compressor stopped with 2), the operation restarts from the point of the normal operation

zone (e point or lower) where it returned after 2 minutes 30 seconds.

4) The error count when the compressor stopped with 2) is cleared after the operation continued for

10 minutes. If the error count becomes [10] without clearing, the error is determined and reactivation is

not performed.

5) For the error display contents, confirm on the check code list.

HEAT

COOL

HEAT TC / COOL TL

[°C]

Abnormal stop

Frequency normal down

Frequency slow down

Frequency hold

62°C

57°C

55°C

53°C

49°C

63°C

62°C

60°C

58°C

54°C

Frequency slow up (Up to command)

As command is

– 52 –

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12. SV2 valve control

The conditions for opening and closing the SV2 valve are shown in the table below.

SV2 Valve “Open” Conditions

SV2 Valve “Close” Conditions

(1)

(2)

When operation stopped after operating

When operation started after operating or when 30 minutes

elapsed after opening SV2 under conditions (1) (2)

Non-operation

When power placed “ON”

When 8 minutes elapsed after starting operation.

When 30 second elapses after first startup

(3)

(4)

(5)

During Cooling

Operations

operation when power ON at TO ≤ 5° C

When Ps ≥ 0.27 MPa

When Ps ≤ 0.23 MPa

When 8 minutes elapsed after starting operation or when

TC ≥ 26°C

When 30 second elapses after first startup

operation when power ON at TC < 26°C

During Heating

Operations

When Ps ≥ 0.19 MPa

(6)

(7)

When Ps ≤ 0.14 MPa

When 4-way valve is OFF during defrost startup.

When conditions for defrost satisfied.

During

Defrost

Operation

When 2 minutes elapsed after four-way valve is ON after

defrost completion

(8)

When conditions for defrost satisfied.

Defrost

start condition

Defrost

completion condition

Defrost operation

66rps

Compressor

revolution number

36rps

OFF

4-way valve

SV2

2 minutes

Open

13. Oil recovery control

1) This control enables periodic recovery of oil accumulating in the indoor unit or in the exchange pipe.

2) After continuous operation for 240 minutes, the lower limit for the compressor revolution number is

raised for 2 minutes and oil is recovered.

Control Conditions

Control Details

Lower limit for compressor revolution number placed to 56 rps per

2 minutes

During Cooling

During Heating

Continuous cooling operation for 240 minutes

Lower limit for compressor revolution number placed to 70 rps per

2 minutes

Continuous heating operation for 240 minutes

The compressor rotation speed is raised to the lower limit

during control.

When low

During startup of oil recovery control, the compressor

revolution number during operation is lower than the

revolution number of the lower limit for control details.

Operate according to indoor commands without lowering

the compressor rotation speed to the lower limit.

(In this case, the timer counts 2 minutes.)

When high

4) When the DOWN zone and the HOLD zone (UP prohibition) are superimposed for example during

current release control or discharge temperature release control, DOWN zone and the HOLD zone have

priority over oil recovery control.

– 53 –

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14. Coil heating control

1) This control has the function of heating the compressor by applying a current to the compressor when

not operating instead using a case heater.

This control is for the purpose of preventing stagnation of the refrigerant inside the compressor.

2) Malfunction in the compressor may result if a current is not applied for a specified time before a test run

after installation as was previously the case.

Similarly, starting operation after turning the power OFF and not operating for a long time also requires

application of a current before starting operation, in the same manner as the test run.

3) Application of current is determined by TD and TO sensors.

When the TO sensor is defective, a backup control is automatically performed by the TE sensor.

When TO sensor is defective, make a determination using the LED display of the outdoor interface board.

4) The power is turned off when TD is 30°C or more.

(When TO sensor defective)

TO [˚C]

TE [˚C]

No current

Current application

conditions

Current application

conditions

TD < 30˚C

Intermittent current

ON: 10 minutes

OFF: 5 minutes

Intermittent current

ON: 10 minutes

OFF: 5 minutes

Continuous

current

Continuous

current

Intermittent current

Continuous current

Corresponding to 100w

(100W : Total power consumption of inverter and compressor)

NOTE

While heating and electrifying the winding wire, electrifying sound may generate. It is nor abnormal.

– 54 –

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8. TROUBLESHOOTING

8-1. Summary ofTroubleshooting

1. Before troubleshooting

1) Required tools/instruments

–

•

and

screwdrivers, spanners, radio cutting pliers, nippers, push pins for reset switch

• Tester, thermometer, pressure gauge, etc.

2) Confirmation points before check

a) The following operations are normal.

1. Compressor does not operate.

• Is not 3-minutes delay (3 minutes after compressor OFF)?

• Is not the outdoor unit in standby status though the remote controller reached the setup

temperature?

• Does not timer operate during fan operation?

• Is not an overflow error detected on the indoor unit?

• Is not outside high-temperature operation controlled in heating operation?

2. Indoor fan does not rotate.

• Does not cool air discharge preventive control work in heating operation?

3. Outdoor fan does not rotate or air volume changes.

• Does not high-temperature release operation control work in heating operation?

• Does not outside low-temperature operation control work in cooling operation?

• Is not defrost operation performed?

4. ON/OFF operation cannot be performed from remote controller.

• Is not the control operation performed from outside/remote side?

• Is not automatic address being set up?

(When the power is turned on at the first time or when indoor unit address setting is changed, the

operation cannot be performed for maximum approx. 5 minutes after power-ON.)

• Is not being carried out a test run by operation of the outdoor controller?

b) Did you return the cabling to the initial positions?

c) Are connecting cables of indoor unit and remote controller correct?

2. Troubleshooting procedure

When a trouble occurred, check the parts along with the following procedure.

→

Trouble

Confirmation of check code display

Check defective position and parts.

NOTE

For cause of a trouble, power conditions or malfunction/erroneous diagnosis of microcomputer due to outer

noise is considered except the items to be checked. If there is any noise source, change the cables of the

remote controller to shield cables.

– 55 –

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1. Before troubleshooting

1) Required tools/instruments

–

•

and

screwdrivers, spanners, radio cutting pliers, nippers, etc.

• Tester, thermometer, pressure gauge, etc.

2) Confirmation points before check

a) The following operations are normal.

1. Compressor does not operate.

• Is not 3-minutes delay (3 minutes after compressor OFF)?

• Is not the outdoor unit in standby status though the remote controller reached the setup

temperature?

• Does not timer operate during fan operation?

• Is not an overflow error detected on the indoor unit?

• Is not outside high-temperature operation controlled in heating operation?

2. Indoor fan does not rotate.

• Does not cool air discharge preventive control work in heating operation?

3) Outdoor fan does not rotate or air volume changes.

• Does not high-temperature release operation control work in heating operation?

• Does not outside low-temperature operation control work in cooling operation?

• Is not defrost operation performed?

4) ON/OFF operation cannot be performed from remote controller.

• Is not forced operation performed?

• Is not the control operation performed from outside/remote side?

• Is not automatic address being set up?

• Is not being carried out a test run by operation of the outdoor controller?

a) Did you return the cabling to the initial positions?

b) Are connecting cables between indoor unit and receiving unit correct?

2. Troubleshooting procedure

(When the power is turned on at the first time or when indoor unit address setting is changed, the operation

cannot be performed for maximum approx. 5 minutes after power-ON.)

When a trouble occurred, check the parts along with the following procedure.

Confirmation of lamp display

Check defective

→

(When 4-way air discharge cassette type

wireless remote controller is connected)

Trouble

position and parts.

1) Outline of judgment

The primary judgment to check where a trouble occurred in indoor unit or outdoor unit is performed with

the following method.

Method to judge the erroneous position by flashing indication on the display part of indoor unit

(sensors of the receiving unit)

The indoor unit monitors operating status of the air conditioner, and the blocked contents of self-diagnosis

are displayed restricted to the following cases if a protective circuit works.

– 56 –

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8-2. Troubleshooting

8-2-1. Outline of judgment

The primary judgment to check whether a trouble occurred in the indoor unit or outdoor unit is carried out with

the following method.

Method to judge the erroneous position by flashing indication on the display part of the indoor unit

(sensors of the receiving part)

The indoor unit monitors the operating status of the air conditioner, and the blocked contents of self-diagnosis

are displayed restricted to the following cases if a protective circuit works.

: Go off,

: Go on,

: Flash (0.5 sec.)

Lamp indication

Operation Timer Ready

Check code

Cause of trouble occurrence

—

Power supply OFF or miswiring between receiving unit and indoor unit

No indication at all

E01

E02

E03

E08

E09

E10

Receiving error

Receiving unit

Miswiring or wire connection error

Sending error

between receiving unit and indoor unit

Communication stop

Operation Timer

Ready

Duplicated indoor unit No.

Setup error

Duplicated master units of remote controller

Flash

Communication error between CPUs on indoor unit P.C. board

Wire connection error between indoor units, Indoor power OFF

(Communication stop between indoor master and follower or between main

and sub indoor twin)

E18

E04

Operation Timer

Ready

Miswiring between indoor unit and outdoor unit or connection erorr

(Communication stop between indoor and outdoor units)

Flash

Ready

P01

P10

P12

P03

P04

P05

P07

P15

P19

P20

P22

P26

P29

Overflow was detected.

Protective device of indoor unit worked.

Indoor DC fan error

Alternate flash

Outdoor unit discharge temp. error

Outdoor high pressure system error

Protective device of

outdoor unit worked.

∗1

Negative phase detection error

Heat sink overheat error

Gas leak detection error

Outdoor unit error

Operation Timer

Ready

4-way valve system error (Indoor or outdoor unit judged.)

Outdoor unit high pressure protection

Alternate flash

Outdoor unit: Outdoor unit error

Protective device of

outdoor unit worked.

Outdoor unit: Inverter Idc operation

Outdoor unit: Position detection error

∗1

Stopped because of error of other indoor unit in a group

(Check codes of E03/L03/L07/L08)

P31

∗1: These are representative examples and the check code differs according to the outdoor unit to be combined.

– 57 –

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Lamp indication

Operation Timer

Check code

F01

Cause of trouble occurrence

Heat exchanger sensor (TCJ) error

Ready

F02

Heat exchanger sensor (TC) error

Heat exchanger sensor (TA) error

Indoor unit sensor error

Alternate flash

P10

F04

Discharge temp. sensor (TD) error

Temp. sensor (TE) error

F06

Operation Timer

Alternate flash

Ready

F07

Temp. sensor (TL) error

F08

Temp. sensor (TO) error

Sensor error of outdoor unit

∗1

Temp. sensor (TS) error

F12

Temp. sensor (TH) error

F13

Temp. Sensor miswiring (TE, TS)

F15

Operation Timer

Ready

F29

F31

Indoor EEPROM error

Outdoor EEPROM error

Simultaneous flash

Operation Timer

Simultaneous flash

H01

H02

H03

H04

Compressor break down

Compressor lock

Outdoor compressor system error ∗1

Operation Timer

Flash

Ready

Current detection circuit error

Case thermostat worked.

PS pressure sensor error,

}

Power supply, outdoor P.C. board error

Compressor overheat, outdoor wiring error

Outdoor unit

low pressure protective operation

low pressure system error

H06

L03

L07

L08

L09

Duplicated master indoor units

There is indoor unit of group connection → AUTO address

in individual indoor unit.

Operation Timer

Ready

* If group construction and

Unsetting of group address

address are not normal

when power supply turned on,

automatically goes to address

setup mode.

Missed setting

(Unset indoor capacity)

Simultaneous flash

L10

L20

L29

L30

L31

Unset model type (Service board)

Duplicated indoor central addresses

Outdoor unit and other error

Outside interlock error

Operation Timer

Ready

Simultaneous flash

Negative phase error

∗1: These are representative examples and the check code differs according to the outdoor unit to be combined.

– 58 –

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8-2-2. Others (Other than Check Code)

Lamp indication

Operation Timer Ready

Check code

Cause of trouble occurrence

—

During test run

Simultaneous flash

Operation Timer Ready

Disagreement of cool/heat

(Automatic cool/heat setting to automatic cool/heat prohibited model, or

—

setting of heating to cooling-only model)

Alternate flash

– 59 –

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8-2-3. Monitor Function of Remote Controller Switch

n Calling of sensor temperature display

Each data of the remote controller, indoor unit and outdoor unit can be understood by calling the service

monitor mode from the remote controller.

TEST

Push

buttons simultaneously for 4 seconds to

call the service monitor mode.

The service monitor goes on, the master indoor unit No. is

displayed at first and then the temperature of item code 00 is

displayed.

TEMP

ON / OFF

TIMER SET

TIME

FAN

SAVE

MODE

VENT

TEMP.

Push temperature set

the item code of data to be monitored.

buttons and then change

FILTER

RESET TEST

SET

SWING/FIX

UNIT LOUVER

The item code list is shown below.

2 4 1

1 2 3 4

Returned to usual display

Item code

Data name

Room temperature

Unit

Item code

Data name

Unit

°C

Outdoor heat exchanger (Coil) temperature (TE)

Outside temperature (TO)

°C

(Remote controller)

Indoor suction temperature (TA)

°C

Compressor discharge temperature (TD)

Compressor suction temperature (TS)

Heat sink temperature (THS)

°C

Indoor heat exchanger (Coil)

temperature (TCJ)

°C

Indoor heat exchanger (Coil)

temperature (TC)

°C

Operation current (× 1/10)

∗ 6D

∗ 70

∗ 72

∗ 73

Outdoor heat exchanger (Coil) temperature (TL)

Compressor operation frequency

°C

∗ 07

∗ F2

Indoor fan revolution frequency

Indoor fan calculated operation time

Filter sign time

rpm

×100h

×1h

rps

rpm

×100h

Outdoor fan revolution frequency (Lower)

Outdoor fan revolution frequency (Upper)

Compressor calculated operation time

∗ F8

Indoor discharge temperature*1

°C

The item codes with ∗ marks in the above table are displayed only

on the indoor units of 4 series models and after.

(4 series indoor units mean RAV-SM1404UT-E for example.).

UNIT LOUVER

Push

button to select the indoor unit to be monitored.

Each data of the indoor unit and its outdoor units can be monitored.

TEST

Pushing

button returns the status to the usual display.

∗1 The indoor discharge temperature of item code [F8] is the estimated value from TC or TCJ sensor.

Use this value to check discharge temperature at test run.

(A discharge temperature sensor is not provided to this model.)

• The data value of each item is not the real time, but value delayed by a few seconds to ten-odd seconds.

– 60 –

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8-2-4. Check Code List (Outdoor)

: Go on,

^{: Flash,}l ^{: Go off}

ALT (Alternate): Alternate flashing when there are two flashing LED SIM (Simultaneous): Simultaneous flashing when there are two flashing LED

Sensor lamp part

Remote

Automatic

reset

Operation

continuation

controller

indication

Block indication

Operation Timer Ready Flash

ALT

Representative defective position

Detection

Explanation of error contents

Open/Short of discharge temp. sensor was detected.

F04

F06

Outdoor unit Discharge temp. sensor (TD) error

Outdoor unit Temp. sensor (TE, TS, TL) error

Outdoor

Open/Short of heat exchanger temp. sensor was detected.

Miswiring between TE sensor and TS sensor

ALT

F08

F07

F12

F13

F15

F31

ALT

SIM

Outdoor unit Outside temp. sensor (TO) error

Outdoor unit Temp. sensor (TL) error

Outdoor unit Temp. sensor (TS) error

Outdoor unit Temp. sensor (TH) error

Outdoor unit Misconnection of temp. sensor (TE, TS)

Outdoor unit EEPROM error

Outdoor

Open/Short of outside temp. sensor was detected.

Open/Short of heat exchanger temp. sensor was detected.

Open/Short of suction temp. sensor was detected.

Open/Short of heat sink temp. sensor (Board installed) was detected.

Misconnection of outdoor heat exchanger temp. sensor and suction temp. sensor was detected.

Outdoor P.C. board part (EEPROM) error was detected.

When reached min-Hz by current release control, short-circuited current (Idc) after

DC excitation was detected.

H01

Outdoor unit Compressor break down

H02

H03

H04

H06

L10

Outdoor unit Compressor lock

Outdoor

Compressor lock was detected.

Outdoor unit Current detection circuit error

Outdoor unit Case thermostat operation

Outdoor unit low pressure system error

Outdoor unit Setting error of service P.C. board type

Current detection circuit error

Case thermostat operation was detected.

Ps pressure sensor error, Low pressure protective operation

When outdoor service P.C. board was used, model type select jumper setting was inappropriate.

SIM

1) Defective parts on outdoor P.C. board (MCU communication, EEPROM, TH sensor error)

2) When outdoor service P.C. board was used, model type selection was inappropriate.

3) Other error (Heat sink abnormal overheat, gas leak, 4-way valve inverse error) was detected.

L29

Outdoor unit Other outdoor unit error

Outdoor unit Discharge temp. error

Outdoor

P03

P04

ALT

Outdoor

Error was detected by discharge temp. release control.

Outdoor unit

When case thermostat worked, error was detected by high release control from indoor/

outdoor heat exchanger temp. sensor. Power supply voltage error

High pressure system error, Power supply voltage error

P05

P07

P15

P20

P22

P26

P29

ALT

Power supply error

Outdoor

Power supply voltage error

Outdoor unit Heat sink overheat

Gas leak detection

Abnormal overheat was detected by outdoor heat sink temp. sensor.

Abnormal overheat of discharge temp. or suction temp. was detected.

Error was detected by high release control from indoor/outdoor heat exchanger temp. sensor.

Error (Over-current, lock, etc.) was detected on outdoor fan drive circuit.

Short-circuited protective operation of compressor drive circuit element (G-Tr /IGBT) worked.

Position detection error of compressor motor was detected.

Outdoor unit High pressure system error

Outdoor unit Outdoor fan error

Outdoor unit Inverter Idc operation

Outdoor unit Position detection error

No remote controller master unit

Remote controller communication error

Remote

controller

Signal was not received from indoor unit.

Main remote controller was not set. (including 2 remote controllers)

E01

E02

E03

—

Remote

controller

Remote controller send error

Signal cannot be sent to indoor unit.

—

Regular communication error between indoor and

remote controller

Indoor

No communication from remote controller and network adapter

E04

E08

Indoor/Outdoor serial error

Indoor

Serial communication error between indoor and outdoor

Same address as yours was detected.

Duplicated indoor addresses

Remote

controller

In 2-remote controller control, both were set as master.

(Indoor master unit stops warning and follower unit continues operation.)

E09

E10

E18

Duplicated main remote controllers

Communication error between CPU

Indoor

MCU communication error between main motor and micro computer

Regular communication error between master and

follower indoor units

Regular communication was impossible between master and follower indoor units.

Communication between twin master (Main unit) and follower (sub unit) was impossible.

Indoor

L03

L07

L08

L09

L30

SIM

Duplicated indoor master units

Indoor

There are multiple master units in a group.

When even one group connection indoor unit exists in individual indoor unit

Indoor address group was unset.

There is group cable in individual indoor unit.

Unset indoor group address

Unset indoor capacity

Capacity of indoor unit was unset.

Outside error input to indoor unit (Interlock)

Abnormal stop by CN80 outside error input

Indoor

Outdoor

P19

ALT

4-way valve inverse error

In heating operation, error was detected by temp. down of indoor heat exchanger or temp. up ofTE, TS.

When this warning was detected before group construction/address check finish at power supply was turned on, the mode shifts automatically to AUTO address setup mode.

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: Go on,

^{: Flash,}l ^{: Go off}

ALT (Alternate): Alternate flashing when there are two flashing LED SIM (Simultaneous): Simultaneous flashing when there are two flashing LED

Sensor lamp part

Block indication

Remote

controller

indication

Automatic

reset

Operation

continuation

Representative defective position

Detection

Explanation of error contents

Open/Short of heat exchanger (TCJ) was detected.

Operation Timer Ready Flash

ALT

F01

F02

F10

F29

P01

P10

P12

P31

Indoor unit Heat exchanger sensor (TCJ) error

Indoor unit Heat exchanger sensor (TC) error

Indoor unit Room temp. sensor (TA) error

Indoor unit Other indoor P.C. board error

Indoor unit Indoor fan error

Indoor

—

ALT

SIM

ALT

Open/Short of heat exchanger (TC) was detected.

Open/Short of room temp. (TA) was detected.

EEPROM error (Other error may be detected. If no error, automatic address is repeated.

Indoor AC fan error was detected. (Fan thermal relay worked.)

Float switch worked.

Indoor unit Overflow detection

Indoor unit Indoor fan error

Indoor fan error (Over-current / Lock, etc.) was detected.

Other indoor under condition of warning in group. E03/L07/L03/L08 warning

Other indoor unit error

Sub remote controller error in a group

(Details of remote controller are displayed with unit No. Only central control side is displayed.)

—

By unit with warning No.

ALT

Error in indoor group

Network adapter

Network adapter/

Center

Communication error of central control system signal

∗ Is not displayed on the remote controller

—

LAN system communication error

Network adapter/

Center

L20

—

SIM

LAN system communication error

Duplicated indoor address of central control system communication

—

There are multiple communication adapters.

Network adapter

There are multiple communication adapters on remote controller communication line.

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Error mode detected by indoor unit

Operation of diagnostic function

Judgment and measures

Check

code

Status of

air conditioner

Cause of operation

Condition

1. Check cables of remote controller and communication adapters.

• Remote controller LCD display OFF (Disconnection)

• Central remote controller [97] check code

No communication from remote

controller (including wireless) and

communication adapter

Stop

Displayed when

E03

(Automatic reset) error is detected

The serial signal is not output from

outdoor unit to indoor unit.

1. Outdoor unit does not completely operate.

• Inter-unit wire check, correction of miswiring

• Check outdoor P.C. board. Correct wiring of P.C. board.

• Miswiring of inter-unit wire

Stop

Displayed when

E04

• Defective serial sending circuit on

outdoor P.C. board

(Automatic reset) error is detected

2. When outdoor unit normally operates

Check P.C. board (Indoor receiving / Outdoor sending).

• Defective serial receiving circuit on

indoor P.C. board

E08

L03

Duplicated indoor unit address

Duplicated indoor master unit

1. Check whether remote controller connection (Group/Individual)

was changed or not after power supply turned on

(Finish of group construction/Address check).

Displayed when

error is detected

* If group construction and address are not normal when the

power has been turned on, the mode automatically shifts to

address setup mode. (Resetting of address)

Stop

There is group wire in individual indoor

unit.

L07

L08

L09

Unset indoor group address

Unset indoor capacity

Displayed when 1. Set indoor capacity (DN=11)

error is detected

Stop

Displayed when 1. Check outside devices.

L30

P10

Abnormal input of outside interlock

error is detected

2. Check indoor P.C. board.

1. Trouble of drain pump

Float switch operation

Displayed when 2. Clogging of drain pump

Stop

• Float circuit, Disconnection,

Coming-off, Float switch contact error

error is detected

3. Check float switch.

4. Check indoor P.C. board.

1. Position detection error

Displayed when 2. Over-current protective circuit of indoor fan driving unit operated.

P12

P19

Indoor DC fan error

Stop

error is detected

3. Indoor fan locked.

4. Check indoor P.C. board.

1. Check 4-way valve.

4-way valve system error

Displayed when 2. Check 2-way valve and check valve.

• After heating operation has started,

indoor heat exchangers temp. is

down.

(Automatic reset) error is detected

3. Check indoor heat exchanger (TC/TCJ).

4. Check indoor P.C. board.

Stop

1. Judge follower unit while master unit is [E03], [L03], [L07] or [L08].

2. Check indoor P.C. board.

Own unit stops while warning is output

to other indoor units.

Displayed when

(Follower unit)

error is detected

(Automatic reset)

P31

F01

F02

Coming-off, disconnection or short of

indoor heat exchanger temp. sensor

(TCJ)

1. Check indoor heat exchanger temp. sensor (TCJ).

2. Check indoor P.C. board.

Stop

Displayed when

(Automatic reset) error is detected

Coming-off, disconnection or short of

indoor heat exchanger temp. sensor

(TC)

1. Check indoor heat exchanger temp. sensor (TC).

2. Check indoor P.C. board.

Stop

Displayed when

(Automatic reset) error is detected

Coming-off, disconnection or short of

indoor heat exchanger temp. sensor

(TA)

1. Check indoor heat exchanger temp. sensor (TA).

2. Check indoor P.C. board.

Stop

Displayed when

F10

F29

(Automatic reset) error is detected

Indoor EEPROM error

Stop

Displayed when 1. Check indoor EEPROM. (including socket insertion)

(Automatic reset) error is detected

• EEPROM access error

2. Check indoor P.C. board.

Communication error between indoor

MCU

1. Check indoor P.C. board.

Stop

Displayed when

E10

E18

(Automatic reset) error is detected

• Communication error between fan

driving MCU and main MCU

1. Check remote controller wiring.

2. Check indoor power supply wiring.

3. Check indoor P.C. board.

Regular communication error between

indoor aster and follower units and

between main and sub units

Stop

Displayed when

(Automatic reset) error is detected

– 63 –

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Error mode detected by outdoor unit

The check code has been ramified from 4 series and after.

The ramified check code is displayed only when both the indoor unit and the outdoor unit are 4 series and after.

(Ex. Combination of RAV-SM1404UT-E with RAV-SM2804AT8-E)

When the indoor unit is 3 series and before, the conventional check code is displayed.

(Ex. Combination of RAV-SM1402CT-E and RAV-SM2804AT8-E: Outdoor unit only is 4 series.)

Operation of diagnostic function

Check code

Indoor unit

before after

Status of

air conditioner

Judgment and measures

Cause of operation

Condition

3 series 4 series

1. Check discharge temp. sensor (TD).

2. Check outdoor P.C. board (MCC-1599).

Disconnection, short of discharge

temp. sensor (TD)

Displayed when

error is detected

F04

F06

F08

F04

F06

F07

F12

F15

F08

Stop

1. Check temp. sensor (TE).

Disconnection, short of outdoor temp.

sensor (TE)

Displayed when

error is detected

2. Check outdoor P.C. board (MCC-1599).

1. Check temp. sensor (TL).

Disconnection, short of outdoor temp.

sensor (TL)

Displayed when

error is detected

Stop

2. Check outdoor P.C. board (MCC-1599).

1. Check suction temp. sensor (TS).

Disconnection, short of suction temp.

sensor (TS)

Displayed when

error is detected

Stop

2. Check outdoor P.C. board (MCC-1599).

1. Check temp. sensor (TE, TS).

Miss-mounting of outdoor temp.

sensor (TE, TS)

Displayed when

error is detected

Stop

2. Check outdoor P.C. board (MCC-1599).

1. Check outside temp. sensor (TO).

Disconnection, short of outside temp.

sensor (TO)

Displayed when

error is detected

Continue

2. Check outdoor P.C. board (MCC-1599).

Disconnection, short of heat sink

temp. sensor (TH)

Displayed when 1. Check outdoor P.C. board (MCC-1599).

error is detected (Q201 is incorporated in TH sensor.)

F13

F31

L10

Stop

Displayed when 1. Check outdoor P.C. board (MCC-1599).

error is detected

Outdoor P.C. EEPROM error

Displayed when 1. Outdoor service P.C. board

Unset jumper of service P.C. board

error is detected

Check model type setting jumper wire.

1. Check outdoor P.C. board

Communication error between

outdoor P.C. board MCU

(MCC-1596, MCC-1597, MCC-1599).

Displayed when

Stop

error is detected 2. Connection check between CN802 of MCC-1599 and

CN504 of MCC-1597, and also connection check

L29

P07

between CN505 of MCC-1597 and CN851 of MCC-1596.

Heat sink overheat error

1. Check screw tightening between PC. Board and heat

sink and check radiator grease (MCC-1596).

Displayed when

error is detected

∗ Heat sink temp. sensor detected

over specified temperature.

L29

2. Check heat sink blast path.

1. Check gas leak, recharge

Detection of gas leak

2. Check full open of service valve.

Displayed when

error is detected

∗ Discharge temp. sensor (TD),

Suction temp. sensor (TS) detected

temperature over specified temp.

3. Check PMV (Pulse Motor Valve).

P15

P19

Stop

4. Check broken pipe.

5. Check discharge temp. sensor (TD), suction temp.

sensor (TS).

4-way valve inverse error

1. Check operation of 4-way valve.

∗ After heating operation has started,

indoor heat exchanger temp. lowers

under the specified temp.

2. Check outdoor heat exchanger (TE), suction temp.

sensor (TS).

Displayed when

error is detected 3. Check indoor heat exchanger sensor (TC).

∗ After heating operation has started,

outdoor heat exchanger / suction

temp. rises over the specified temp.

4. Check 4-way valve coil.

5. Check PMV (Pulse Motor Valve).

Compressor break down

1. Check power supply voltage. (AC342 to 457V)

Displayed when

error is detected

∗ Although operation has started,

operation frequency decreases and

operation stops.

2. Overload operation of refrigerating cycle

H01

H02

H01

H02

Stop

Compressor lock

1. Trouble of compressor (Lock, etc.): Replace compressor.

Displayed when

* Over-current detection after

compressor start-up

2. Wiring error of compressor (Open phase)

error is detected

– 64 –

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Operation of diagnostic function

Check code

Indoor unit

Status of

air conditioner

Judgment and measures

Cause of operation

Condition

before

after

3 series 4 series

Displayed when 1. Check outdoor P.C. board (MCC-1596).

H03

Current detection circuit error

Stop

error is detected

(AC current detection circuit)

H03

P05

1. Check open phase of 3-phase power supply.

Open phase of 3-phase power

supply

Displayed when

error is detected

2. Black lead wire to be connected to CN03 of MCC-1596

does not pass through T611.

1. Check connection of Ps sensor connector.

2. Check failure of Ps sensor.

Displayed when

error is detected

F23

Ps sensor error

Stop

3. Check compressing power error of compressor.

4. Check 4-way valve error.

5. Check outdoor P.C. board error.

1. Check service valves are fully opened.

(Gas side, Liquid side)

H06

2. Check clogging of outdoor PMV. (PMV1, 2)

3. Check SV2 circuit.

Displayed when

H06

Low pressure protective operation

Stop

error is detected 4. Check Ps sensor error.

5. Check clogging of indoor filter.

6. Check clogging of refrigerant pipe.

7. Check of outdoor fan operation. (In heating mode)

8. Check short of refrigerant.

Discharge temp. error

1. Check refrigerating cycle (Gas leak)

2. Trouble of electronic expansion valve

3. Check discharge temp. sensor (TD).

Displayed when

error is detected

P03

H04

Stop

∗ Discharge temp. (TD) over

specified value was detected.

1. Check case thermostat and connector.

2. Check gas leak, recharge

Case thermostat operation

Displayed when

error is detected

3. Check full open of service valve.

4. Check PMV (Pulse Motor Valve).

5. Check broken pipe.

∗ Abnormal overheat of compressor

1. Check service valves are fully opened.

(Gas side, Liquid side)

2. Check of outdoor fan operation.

3. Check motor error of outdoor fan.

4. Check clogging of outdoor PMV. (PMV1, 2)

5. Check clogging of heat exchanger in indoor/outdoor units.

6. Short-circuit status of suction/discharge air in outdoor unit.

7. Check outdoor P.C. board error.

Displayed when

error is detected

P04

High pressure SW system error

Stop

P04

8. Check fan system error (Cause of air volume drop) at

indoor side.

9. Check PMV opening status in indoor unit.

Displayed when 1. Check power supply voltage. AC342 to 457V

error is detected

P05

P20

Power supply voltage error

Stop

1. Check outdoor heat exchanger sensor (TL).

2. Check indoor heat exchanger sensor (TC, TCJ).

3. Check full open of service valve.

High pressure protective operation

• During cooling operation, outdoor

temp. sensor (TL) detected

temperature over specified temp.

Displayed when 4. Check indoor/outdoor fan.

error is detected

5. Check PMV (Pulse Motor Valve).

• During heating operation, indoor

temp. sensor (TC, TCJ) detected

temperature over specified temp.

6. Check clogging and short circuit of indoor/outdoor heat

exchanger.

7. Overcharge of refrigerant. Recharge

1. Check lock of fan motor.

2. Check power supply voltage between L2 and N.

AC198 to 264V

Displayed when

error is detected

P22

Outdoor fan system error

Stop

3. Check outdoor P.C. board.

1. When performing operation while taking-off compressor

wire, P26 error occurs. Check control P.C. board

(MCC-1596).

Displayed when

error is detected

Short-circuit error of compressor

driving element

Stop

P26

P29

P26

P29

2. When performing operation while taking-off compressor

wire, an error does not occur. (Compressor rare short)

Displayed when 1. Check control P.C. board (MCC-1596).

error is detected

Position detection circuit error

– 65 –

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Error mode detected by remote controller or central controller (TCC-LINK)

Operation of diagnostic function

Judgment and measures

Status of

air conditioner

Check code

Cause of operation

Condition

Power supply error of remote controller, Indoor

EEPROM error

1. Check remote controller inter-unit wiring.

2. Check remote controller.

No communication with master indoor unit

• Remote controller wiring is not correct.

• Power of indoor unit is not turned on.

• Automatic address cannot be completed.

Not displayed at all

(Operation on

remote controller

is impossible.)

3. Check indoor power wiring.

4. Check indoor P.C. board.

Stop

—

5. Check indoor EEPROM.

(including socket insertion)

→ Automatic address repeating phenom-

enon generates.

Receiving error from remote controller

1. Check remote controller inter-unit wiring.

2. Check remote controller.

No communication with master indoor unit

Stop

(Automatic reset)

E01

• Disconnection of inter-unit wire between

remote controller and master indoor unit

(Detected by remote controller side)

Displayed when

error is detected

∗ If center exists,

∗2

3. Check indoor power wiring.

operation continues.

4. Check indoor P.C. board.

Stop

Sending error of remote controller

(Automatic reset)

Signal send error to indoor unit

(Detected by remote controller side)

Displayed when 1. Check sending circuit inside of remote

E02

∗ If center exists,

error is detected

controller.

operation continues.

→ Replace remote controller.

1. In 2-remote controllers (including wireless),

there are multiple main units.

Stop

(Sub unit

continues operation.)

There are multiple main remote controllers.

(Detected by remote controller side)

Displayed when

error is detected

E09

L20

Check that there are 1 main remote

controller and other sub remote controllers.

1. Check setting of central control system

network address. (Network adapter SW01)

Duplicated indoor central addresses on

communication of central control system

(Detected by indoor/central controller side)

Stop

(Automatic reset)

Displayed when

error is detected

Central controller

L20

2. Check network adapter P.C. board.

—

1. Check communication wire / miswiring

2. Check communication (U3, U4 terminals)

3. Check network adapter P.C. board.

∗3

Communication circuit error of central

control system

(Detected by central controller side)

Continues

Displayed when

Central controller

(Send)

4. Check central controller (such as central

control remote controller, etc.)

(By remote controller) error is detected

C05

(Receive)

C06

5. Check terminal resistance. (TCC-LINK)

—

Continuation/Stop

(According

to each case)

Indoor Gr sub unit error

(Detected by central controller side)

Displayed when Check the check code of the corresponding

error is detected unit from remote controller.

Central controller

P30

∗2 The check code cannot be displayed by the wired remote controller.

(Usual operation of air conditioner becomes unavailable.)

For the wireless models, an error is notified with indication lamp.

∗3 This trouble is related to communication of remote controller (A, B), central system (TCC-LINK U3, U4), and

[E01], [E02], [E03], [E09] or [E18] is displayed or no check display on the remote controller according to the

contents.

– 66 –

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8-2-5. Diagnostic Procedure for Each Check Code (Outdoor Unit)

1) This section describes the diagnostic method for each check code displayed on the remote controller.

2) In some cases, a check code indicates multiple symptoms.

In this case, confirm LED display on the outdoor P.C. board to narrow the contents to be confirmed.

3) The check code on the remote controller is displayed only when the same error occurred continuously by

multiple times while LED of the outdoor P.C. board displays even an error which occurred once.

Therefore the display on the remote controller may differ from that of LED.

LED display on outdoor P.C. board

Dip switch setup

• When turning on 1) only of SW803, the latest error

is displayed. As the memory is stored, it can be

confirmed even if the power supply is turned off

once. (excluding outside temp. sensor (TO) error)

Only 1) of SW803 is ON.

• When the work finished or the outdoor temp.

sensor (TO) error was found, turn off all of SW803.

(The error which occurs at present is displayed.)

All SW803 are OFF. (Initial status)

Display selection

^{<Display 1>}ó ^{<Display 2>}

(No error)

(Error occurred) (Push SW800)

• When even a LED of D800 to D804 (Yellow)

goes on, error occurrence is indicated. <Display 1>

D805 (Green)

D804 (Yellow)

D803 (Yellow)

D802 (Yellow)

D801 (Yellow)

D800 (Yellow)

• If pushing the button switch SW800 for 1 second

under the above condition, the yellow LED is

displayed with flashing. <Display 2>

• When pushing SW800 for 1 second again, the

status returns to <Display 1>.

(Example of discharge temp. sensor error)

: Go off, : Go on, : Flash

• The error contents can be confirmed by combining

<Display 1> and <Display 2>.

Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[E04]

—

[Indoor/Outdoor communication error]

Is setting of group address

of remote controller correct?

Check Item code [14].

YES

Are inner wiring and

inter-unit cables (1, 2, 3) normal?

Correct wiring

and inter-unit cable.

YES

Are connection of CN01 of MCC-1599 and

wiring of terminal blocks (1, 2, 3) normal?

Correct wiring of connectors

and terminal blocks.

YES

Does D502 (Orange LED) flash after

power supply is turned on again?

Check indoor P.C. board.

Defect → Replace

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

– 67 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[F04]

<Display 1> <Display 2> [Discharge temp. sensor (TD) error]

Correct connector.

Sensor error → Replace

Is CN603 connection normal?

Is resistance value of TD sensor normal?

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[F06]

• There is a possibility that it is one of the following errors.

Confirm LED on outdoor P.C. board to judge which error it is.

Heat exchanger temp. sensor (TE) error, Heat exchanger temp. sensor (TL) error,

Suction temp. sensor (TS) error, Miswiring of heat exchanger sensor (TE, TS)

<Display 1> <Display 2> Heat exchanger temp. sensor (TE) error]

Correct connector.

Sensor error → Replace

Is CN601 connection normal?

Is resistance value of TE sensor normal?

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

<Display 1> <Display 2> [Heat exchanger temp. sensor (TL) error] → Refer to [F07] column.

<Display 1> <Display 2> [Suction temp. sensor (TS) error] → Refer to [F12] column.

<Display 1> <Display 2> [Miswiring of heat exchanger sensor (TE,TS)] → Refer to [F15] column.

[F07]

<Display 1> <Display 2> [Heat exchanger temp. sensor (TL) error]

Correct connector.

Sensor error → Replace

Is CN604 connection normal?

Is resistance value of TL sensor normal?

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

– 68 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[F08]

<Display 1> <Display 2> [Outside air temp. sensor (TO) error]

Correct connector.

Sensor error → Replace

Is CN602 connection normal?

Is resistance value of TO sensor normal?

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[F12]

<Display 1> <Display 2> [Suction temp. sensor (TS) error]

Correct connector.

Sensor error → Replace

Is CN600 connection normal?

Is resistance value of TS sensor normal?

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[F13]

<Display 1> <Display 2> [Heat sink temp. sensor (TH) error]

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[F15]

<Display 1> <Display 2> [Miswiring of heat exchanger sensor (TE,TS)]

Is mounting status of

TE and TS sensors normal?

Correct sensor mounting.

YES

Correct connector.

Sensor error → Replace

Is CN600 connection normal?

Is resistance value of TS sensor normal?

YES

Is CN601 connection normal?

Correct connector.

Is resistance value of TE sensor normal?

Sensor error → Replace

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

– 69 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[F23]

<Display 1> <Display 2> [PS sensor error]

Is connector of

Ps sensor correctly connected?

Correct connection of connector.

YES

Connector: CN606, White

Are the output current characteristics

Sensor error

of Ps sensor normal?

YES

∗

Pressure by pressure gauge (Check joint)

Pressure display on LED display

Output power of I/F (CDB) P.C. board

ꢀ

ꢁ

ꢂ

and

are different,

ꢀ

ꢁ ꢀ

ꢂ

an error of the pressure sensor is considered.

and

are different, check I/F P.C. board.

ꢁ

ꢂ

Does not refrigerant bypass

from discharge port to suction port

of 4-way valve?

Check compressor.

YES

Check 4-way valve.

[F31]

<Display 1> <Display 2> [EEPROM error]

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[H01]

<Display 1> <Display 2> [Compressor break down]

Is power supply voltage normal?

AC342 to 457V

Correct power supply line.

YES

Is wire connection normal?

Compressor lead

(Board side, Compressor side),

Reactor lead, Power supply lead

Check wire connection

and correct it.

YES

Is it not abnormal overload?

Correct and clear the cause.

Check outdoor P.C. board (MCC-1596).

Defect → Replace

– 70 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[H02]

<Display 1> <Display 2> [Compressor lock]

Is power supply voltage normal?

AC342 to 457V

Correct power supply line.

YES

Is wire connection normal?

Compressor lead

(Board side, Compressor side),

Reactor lead, Power supply lead

Check wire connection

and correct it.

YES

Check outdoor P.C. board.

Is compressor normal?

Defect → Replace

Is there no refrigerant stagnation?

YES

Compressor lock → Replace

Check TE, TS sensors and PMV.

Does PMV normally operate?

YES

Defect → Replace

Check outdoor P.C. board (MCC-1596).

Defect → Replace

[H03]

<Display 1> <Display 2> [Current detection circuit error]

Check outdoor P.C. board (MCC-1596).

Defect → Replace

<Display 1> <Display 2> [Power supply error (Vdc)] → Refer to [P05] column.

[H04]

<Display 1> <Display 2> [Case thermostat operation]

Are CN609 connection

and case thermostat normal?

Correct connector.

Case thermostat error → Replace

YES

Check outdoor P.C. board (MCC-1599).

Is cooling/heating operation available

when short-circuiting case thermostat?

Defect → Replace

YES

Repair defectives position.

Recharge refrigerant.

Is there no gas leak?

Is it not refrigerant shortage?

YES

Is valve fully opened?

YES

Open valve fully.

Correct defective position.

Replace defective part.

Is PMV normal?

YES

Check crushed or broken pipe.

Defect → Correct and Replace

– 71 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[H06]

<Display 1> <Display 2> [Low pressure protective operation]

Are gas pipe, liquid pipe

and service valve of the

outdoor unit fully opened?

Open the service valve fully.

Replace low pressure sensor.

YES

Are the pressure

sensor characteristics of

low pressure normal?

YES

∗

Pressure by pressure gauge (Check joint)

Pressure indication by LED

ꢀ

ꢁ

ꢂ

Output power of I/F (CDB) P.C. board

and

are different,

ꢀ

ꢁ ꢀ

ꢂ

an error of the pressure sensor is considered.

If and are different, check P.C. board.

ꢁ

ꢂ

Is SV2 circuit normal?

Correct SV2 circuit.

YES

Check miss-wiring, wrong installation and connection of connector.

Isn’t any indoor unit

which has different refrigerant

system connected?

YES

Correct wiring to regular wiring.

(Using miss-wiring check function of the outdoor unit, check them.)

In cooling season, go to

In heating season, go to

Cooling

Are parts related to the

indoor fan motor normal?

1. Connection of connector

2. Capacitor

Does cooling

Repair the

indoor fan normally operate?

defective position.

3. Motor 4. Fan

YES

Is there clogging of indoor filter

or heat exchanger?

Cleaning

Check indoor P.C. board

Defective → Replace

Refrigerant shortage, clogging

or pipe breakage is considered.

Are connection of connectors

and coils normal?

Repair the

defective position.

YES

Replace PMV

with new one.

Is blocking found in entire valve?

Heating

Is indoor fan

system normal?

Does heating outdoor fan

normally operate?

Repair the

defective position.

· Fan breakage

· Fan coming-off

YES

Is there clogging of

outdoor heat exchanger?

Cleaning

Check outdoor P.C. board

Defective → Replace

Is outdoor PMV normal?

YES

Shortage of

refrigerant/blocking/pipe breakage

[L10]

<Display 1> <Display 2> [Unset model type]: Only when service P.C. board is used

Cut jumper line according

to the explanation sheet packaged

with the service P.C. board.

– 72 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[L29]

∗ There is a possibility that it is one of the following errors.

Confirm LED on outdoor P.C. board to judge which error it is.

Communication error between MCU, Heat sing temp. sensor (TH) error,

EEPROM error, Unset model type, Heat sink overheat error, Gas leak detection,

4-way valve inverse error

<Display 1> <Display 2> [Communication error between MCU]

1. Connection check between CN802 of MCC-1599 and CN504 of MCC-1597

and also connection check between CN505 of MCC-1597 and CN851 of

MCC-1596.

2. Check outdoor P.C. board (MCC-1596, MCC-1597, MCC-1599).

Defect → Replace

<Display 1> <Display 2> [Heat sink temp. sensor (TH) error] → Refer to [F13] column.

<Display 1> <Display 2> [EEPROM error] → Refer to [F31] column.

<Display 1> <Display 2> [Unset model type] → Refer to [L10] column.

<Display 1> <Display 2> [Heat sink overheat error] → Refer to [P07] column.

<Display 1> <Display 2> [Gas leak detection] → Refer to [P15] column.

<Display 1> <Display 2> [4-way valve inverse error] → Refer to [P19] column.

– 73 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[P03]

<Display 1> <Display 2> [Discharge temp. error]

Repair defective position.

Recharge refrigerant.

Is there no gas leak?

Is refrigerant charge amount adequate?

YES

Repair defective position.

Replace defective part.

Is PMV normal?

YES

Correct and clear the cause.

Is it not abnormal overload?

Correct connector.

Sensor error → Replace

Is CN603 connection normal?

Is resistance value of TD sensor normal?

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[P04]

∗ There is a possibility that it is one of the following errors.

Confirm LED on outdoor P.C. board to judge which error it is. (1) high-pressure SW system error,

(2) power supply error (Vdc), (3) high-pressure protective operation, (4) case thermo operation.

<Display 1> <Display 2> [High pressure SW system error]

Power supply error (Vdc), High pressure protective operation, Case thermostat

operation.

Doesn’t high pressure switch

operate?

Wiring check,

Correct.

Is circuit wiring normal?

YES

Are parts of

Parts check

high pressure switch normal?

Defective → Replace

YES

Open service valve fully.

Is service valve fully opened?

YES

Reset the power supply and

then do a trial operation according

to the season.

B ← Cooling operation

C ← Heating operation

Check Comp. IPDU PC board

Defective → Replace

B Cooling operation.

Does cooling outdoor fan

normally operate?

Is there no fan breakage

or coming-off?

YES

Repair defective position.

Connection of connectors,

Fan IPDU, Fan motor, Wiring.

Is there any element

which blocks heat exchanger

of the outdoor unit?

ꢀ

ꢁ

YES

Elimination of

blocking element

Clogging of heat exchanger

Short circuit

Overcharge of refrigerant/

Clogging/Pipe breakage/

Abnormal overload

– 74 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[P04]

Heating operation

Are connections of

connectors,capacitors

and fan motor normal?

Does the heating indoor fan

normally operate?

YES

Is there any element which

YES

blocks indoor heat exchanger?

Elimination of

blocking element

Repair

defective position.

Filter clogging

ꢀ

ꢁ

ꢂ

Clogging of heat exchanger

Short circuit

Are characteristics

of TC and TCJ sensor

resistance value normal?

Clogging by refrigerant

overcharge/Pipe breakage/

Abnormal overload

YES

Check indoor P.C. board

Defective → Replace

Replace

TC or TCJ sensor.

<Display 1> <Display 2> [Case thermostat operation] → Refer to [H04] column.

<Display 1> <Display 2> [Power supply error (Vdc)] → Refer to [P05] column.

<Display 1> <Display 2> [High pressure protective operation] → Refer to [P20] column.

– 75 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[P05]

<Display 1> <Display 2> [Power supply error (Voltage error)]

YES

Is there no open phase

of the power supply?

Correct wiring.

Is there no down or up

of power supply voltage?

(AC342 to 457V)

Confirm electric construction, etc.

Check outdoor P.C. board (MCC-1600).

Defect → Replace

[P07]

<Display 1> <Display 2> [Heat sink overheat error]

Is there no loosening of

YES

Apply radiation grease

to objective part.

screws of motor drive element of

outdoor P.C. board (MCC-1596) Q201?

Did not forget to apply radiation grease

to rear side of Q201?

Retightening of screws.

Is not the ventilation flue

of the heat sink blocked?

Is not the fan blocked?

(Short-circuit, etc.)

Remove blocking matter.

Correct short-circuit.

YES

Check outdoor P.C. board (MCC-1596).

Defect → Replace

[P15]

<Display 1> <Display 2> [Gas leak detection]

Is there no gas leak?

Repair defective position.

Recharge refrigerant.

Is refrigerant charge amount adequate?

YES

Correct defective position.

Replace defective part.

Is PMV normal?

YES

Open valve fully.

Is valve fully opened?

YES

Is there no crushed pipe?

Correct and replace piping.

Error

Check temp. sensor.

TD sensor CN603, TS sensor CN600

Correct connector.

Sensor error → Replace

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[P19]

<Display 1> <Display 2> [4-way valve inverse error]

Temperature sensor check

TE sensor CN601

Is operation of

YES

4-way valve normal?

TS sensor CN600

(Check pipe temp., etc. in

cooling/heating operation.)

Indoor TC sensor

Defect → Correct and repair

Is power supplied

to 4-way valve coil?

Replace coil of 4-way valve.

YES

Error

Check operation of

outdoor I/F (CDB) P.C. board.

Check outdoor P.C. board.

Defect → replace

Check 4-way valve.

Defect → Replace

– 76 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[P20]

<Display 1> <Display 2> [High pressure protective operation]

Is valve fully opened?

YES

Open valve fully.

Reset the power supply

and then perform test run

matching to the season.

Cooling season

Cooling operation

Heating season

Heating operation

Is there no problem

on outdoor TL sensor?

(Measurement of resistance value)

YES

Replace sensor.

Is there no crack or

loosening of outdoor fan?

YES

Check outdoor fan.

Defect → Replace, retightening

Does not the outdoor fan

perform abnormal operation?

YES

Check the same items as

[P22] error.

Is there no element

which interfere heat exchange

of outdoor unit?

YES

• Clogging of heat exchanger

• Short circuit

Eliminate interfering element.

Check overcharge of refrigerant, clogging of cycle,

broken pipe, abnormal overload, etc.

Defect → Correct defective position.

Does indoor fan

normally operate?

Are indoor fan motor

and connector normal?

YES

Repair defective position.

Are resistance values

of indoor TC and TCJ

sensors normal?

Replace

sensor.

YES

Check indoor P.C. board.

Defect → Replace

Is there no element which

interfere heat exchange of indoor unit?

• Clogging of filter

YES

Eliminate interfering element.

• Clogging of heat exchanger

• Short circuit

Check overcharge of refrigerant, clogging of cycle,

broken pipe, abnormal overload, etc.

Defect → Correct defective position.

– 77 –

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Check

code

Outdoor

LED display

Check and troubleshooting

(Item without special mention Indicates part of outdoor unit.)

[P22]

<Display 1> <Display 2> [Fan system error]

Is there no problem on power supply voltage?

(342 to 457V)

Check wiring construction.

Ask repair of power supply.

YES

Does the fan rotate without trouble when rotating

shaft of fan motor with hands during power-OFF?

Is there no problem on coil resistance of fan motor?

Between red and white lead wire : 12 to 20Ω

Between white and black lead wire : 12 to 20Ω

Between black and red lead wire : 12 to 20Ω

YES

Check outdoor P.C. board (MCC-1597).

Replace fan motor.

Defect → Replace

Single operation check for outdoor fan

1) Set SW804 of Dip switch as the following figure and then push SW801 for

approx. 1 second to check single operation of outdoor fan. Use this method to

check which fan, upper or lower fan, has a trouble.

• When pushing SW801 for 1 second again or 2 minutes passed, the fan stops.

2) After check, turn off all Dip switch

Outdoor fan single operation

SW804.

SW804

SW801

Push

[P26]

[Short-circuit of compressor drive element]

Is there no problem on connection

of compressor lead or reactor?

(Check referring to Wiring diagram.)

Correct wiring.

YES

The same error does not occur in

operation without compressor lead.

Replace outdoor P.C. board.

YES

Check compressor. (Rear short, etc.)

Defect → Replace

[P29]

[Position detection circuit error]

Check outdoor P.C. board (MCC-1596).

Defect → Replace

—

No code

[Other error] Compressor disorder due to sudden change of load, etc.

∗ Although the display of outdoor LED outputs, the unit automatically restarts

and error is not determined.

∗ LED display also may output due to negative phase of compressor or wire

coming-off.

– 78 –

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Temperature sensor

Temperature – Resistance value characteristic table

TA,TC,TCJ,TE,TS,TO sensors

TD,TL sensors

Representative value

Resistance value (kΩ)

(Minimum value) (Standard value) (Maximum value)

Resistance value (kΩ)

(Minimum value) (Standard value) (Maximum value)

Temperature

(°C)

100

32.33

19.63

12.23

9.75

33.80

20.35

12.59

10.00

7.990

5.192

3.451

2.343

1.623

1.146

0.8237

0.6023

35.30

21.09

12.95

10.25

8.218

5.375

3.594

2.454

1.709

1.213

0.8761

0.6434

100

150.5

92.76

58.61

47.01

37.93

25.12

17.00

11.74

8.269

5.925

4.321

3.205

161.3

99.05

62.36

49.93

40.22

26.55

17.92

12.34

8.668

6.195

4.507

3.336

172.7

105.6

66.26

52.97

42.59

28.03

18.86

12.95

9.074

6.470

4.696

3.468

7.764

5.013

3.312

2.236

1.540

1.082

0.7740

0.5634

TA,TC,TCJ,TE,TS,TO sensors

Low pressure sensor

3.5

2.0

0.5

10 20 30 40 50 60 70 80 90 100

0.49

0.98

Temperature (˚C)

Pressure (MPa)

Pressure sensor I/O wire

connecting table

TD,TL sensors

Pin No. Input/output name Lead wire

200

150

100

—

OUTPUT

GND

White

Black

Red

DC5V

10 20 30 40 50 60 70 80 90 100

Temperature (˚C)

∗ As TH sensor (Outdoor unit heat sink temp. sensor) is incorporated in the outdoor control P.C. board, the resistance

value cannot be measured.

– 79 –

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9. SETUP AT LOCAL SITE AND OTHERS

9-1. Calling of Error History

The error contents in the past can be called.

TEMP.

ON / OFF

SET

TEST

Push

buttons simultaneously for

TIMER SET

TIME

FAN

SAVE

MODE

VENT

4 seconds or more to call the service check mode.

Service Check goes on, the CODE No. 01 is displayed, and then

the content of the latest alarm is displayed.The number and error

contents of the indoor unit in which an error occurred are dis-

played.

FILTER

RESET TEST

SET

SWING/FIX

UNIT LOUVER

In order to monitor another error history, push the set

temperature

buttons to change the error

2 3 1

history No. (CODE No.).

CODE No. 01 (Latest) → CODE No. 04 (Old)

NOTE : 4 error histories are stored in memory.

TEST

1 2 3

Pushing

button returns the display to usual display.

REQUIREMENT

Returned to usual display

Do not push

button, otherwise all the error histories of the indoor

unit are deleted.

9-2. Group Control Operation

In a group control, operation of maximum 8 indoor units can be controlled by a remote controller.

The indoor unit connected with outdoor unit (Individual/Master of twin) controls room temperature according to

setting on the remote controller.

OUT

Master

2-1

1-1

3-1

4-1

7-1

Max. 8 units

Remote controller

1. Display range on remote controller

The setup range (Operation mode/Air volume select/Setup temp) of the indoor unit which was set to the

master unit is reflected on the remote controller.

2. Address setup

Turn on power of the indoor unit to be controlled in a group within 3 minutes after setting of automatic

address. If power of the indoor unit is not turned on within 3 minutes (completion of automatic address

setting), the system is rebooted and the automatic address setting will be judged again.

1) Connect 3 In/Out cables surely.

2) Check line address/indoor address/group address of the unit one by one.

3) The unit No. (line/indoor gout address) which have been set once keep the present status as a rule if the

unit No. is not duplicated with one of another unit.

– 80 –

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n Indoor unit power-ON sequence

Power ON

• The unit without power feed waits entirely

→ Waiting status is released by system start

• Reboot when power is fed on the way

<Automatic

address judgment>

Not normal

3 minutes elapse

Gr construction check

YES

Normal

∗ Gr normal

1) There is no duplicated indoor unit address.

2) There is no invalid indoor unit address.

3) Individual unit and master/follower units

are not intermingled.

4) Only a unit for individual.

5) A master indoor unit and 1 or more

follower indoor units for Gr.

System start

Automatic address starts.

(Approx. 1 minute up to finish)

Outdoor model distinction (10 seconds) (Indoor unit)

Twin Master/follower distinction (Indoor unit)

Gr construction, louver information (Remote controller)

• Power supply/Indoor/Outdoor serial and Gr wiring: OK

• Powers of all indoor units are turned on within 3 minutes.

• Reception time for remote controller operation

(After power supply was turned on)

1) When address is OK : Approx. 50 seconds

2) In AUTO address

: Approx. 4 to 5 minutes

Remote controller operation is available.

(Approx. 50 seconds after power-ON)

<Usual regular

communication>

Regular communication between indoor units (Every 30 seconds) (Master/Follower)

Regular communication on the identical pipe (every 30 seconds) (Twin Master/Follower)

(When the above status changes, immediately communicates.)

(Repetition)

• In a group operation, if the indoor unit which was fed power after judgment of automatic address cannot

receive regular communication from the master unit and regular communication on identical pipe within

120 seconds after power was turned on, it reboots (system reset).

→ The operation starts from judgment of automatic address (Gr construction check) again.

(If the address of the master unit was determined in the previous time, the power fed to the master unit and

reboot works, the master unit may change though the indoor unit line address is not changed.)

– 81 –

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9-3. Outdoor Unit

9-3-1. Various Setting on Outdoor Unit (Existing piping, Power save, Cooling-only, etc.)

The following settings are available by DIP switch setup and jumper line setup.

Function

Existing

Set position

Control contents

Turn the switch to ON when Ø19.1 is used for the existing pipe.

piping setup

In this case, the heating capacity may lower according to outside

temp. and indoor temp. in heating operation.

SW802

Power save

setup

Turn the switch to ON when using the power save function.

The control to lower the compressor frequency (Approx. –10%) is

performed by indoor heat exchanger temp. in heating operation.

Existing piping setup

Power save setup

Snow-proof fan control

When snow enters from clearance of the fan guard or heat

exchanger into blast path and it is accumulated, the control to

prevent generation of motor lock is validated.

Snow-proof

fan control

∗ all are OFF at shipment.

When outside temp. is below 0°C though the compressor stops,

the outdoor fan operates with W5.

The defrost interval is cut to shorten it than the standard status.

Defrost

time change

J805, J806

For contents of control and cutting method, refer to Section

7-4. Defrost control.

When it is needed to lower the maximum value of the compressor

frequency, cut the jumper line. Max. frequency at cooling/heating

is lowered.

In this case the Max. capacity decreases.

Max. frequency of compressor

Max. frequency

change

J807

RAV-SM224

RAV-SM280

Model

COOL

HEAT

74.4

COOL

HEAT

96.0

Standard status

When J807 is cut

78.0

66.6

91.2

76.8

66.6

76.8

When using the air conditioner as a cooling-only conditioner, cut

the jumper line. (An air conditioner can be changed to cooling-only

conditioner by “0F” of DN code on the remote controller.)

Cooling-only

setup

J808

– 82 –

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9-3-2. Service Support Function (LED Display, Switch Operation)

1. Outline

A various setup and operation check can be performed by DIP switches at 3 positions

(SW802, SW803, SW804) and the pushdown button switches (SW800, SW801) at 2 positions.

Operation part

Part No.

SW800

SW803

SW801

SW804

SW802

Specifications

Pushdown button switch

DIP switch

Operation contents

Exchanges the displayed contents of LED (D800 to D804) on the outdoor

control P.C. board.

Pushdown button switch

DIP switch

Performs the specific operation to check maintenance.

Performs various initial settings. (Refer to 9-3-1.)

DIP switch

Display part

Part No.

Specifications

Operation contents

Indoor/Outdoor communication (Serial communication) signal display

(Receive signal from indoor signal)

D502

Orange LED

Indoor/Outdoor communication (Serial communication) signal display

(Send signal from outdoor signal)

D503

Green LED

Yellow LED

Error display

When all SW803 are OFF, or when any of D800 to D804 goes on, LED

displays that the outdoor controller detects an error.

D800 to D804

When status of SW803 is other than OFF, various indications are displayed.

Power-ON display

When the power of the outdoor unit is turned on, LED goes on.

When SW801 and SW804 operate the specific operation, LED flashes.

D805

Green LED

∗ All LED are colorless when it goes off.

Enlarged view of

LEDs

SW804

SW805

D805

D804

D803

D802

D801

D800

SW802

SW803

SW800 SW801 SW806

LED

D805

D804

D803

D802

D801

D800

D502

D503

– 83 –

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9-3-3. Others

1. Selection of LED display (SW800, SW803 operation)

1) Display selection list

The displayed contents of LED D800 to D804 on the outdoor control P.C. board can be exchanged by

operation of SW803.

Switch

Function / Contents

Refer

Error display (Error generating at present)

Error generating at present is displayed.

Refer to

SW803

This switch goes off when an error does not generate.

Error display (The latest error: Latest error including present)

Refer to

After error status was cleared, the error which generated before

can be confirmed by this setting. (Reconfirmation is available

even if power supply was turned off once.)

SW803

• If an error generates at present, the same contents as those of

error which is generating at present are displayed.

• Only error of TO sensor is not displayed by this setting.

(Confirm it by setting of error which is generating at present.)

Temperature sensor display

The detected value of temperature sensor is displayed.

Refer to

SW803

TCJ

SW803

Current display

Refer to

SW803

The current value which flows in the outdoor unit is displayed.

Compressor operation frequency display

The operation frequency of the compressor is displayed.

Refer to

SW803

PMV opening display

The opening of PMV (Pulse Motor Valve) is displayed.

Refer to

SW803

Ps sensor display

Detected Ps sensor is displayed.

Refer to

SW803

– 84 –

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2) Error display

The error which is generating at present and the latest error (Latest error information including present)

can be confirmed by lighting LED D800 toD804 on the outdoor control P.C. board.

a) When all DIP switch SW803 are OFF, the status of error which is generating at present is displayed.

b) <1> only of DIP switch SW803 is turned on, the error which generated before

(Latest error information including present) is displayed.a)

c) If there is an error, any of LED D800 to D804 goes on. (Display 1)

d) When pushing the pushdown button switch SW800 for approx. 1 second, the display is exchanged.

(Display 2)

e) When pushing SW800 again or after 2 minutes, the status returns to that of Display

(Legend)

Present error

SW803

Latest error

SW803

D800

D801

D803

D804

D802

D805

(Yellow) (Yellow) (Yellow) (Yellow) (Yellow) (Green)

: Go on, : Flash

l ^{: Go off,}

Display 1)

Display 2)

Wired remote controller

Error code

Error contents

(Initial display) (SW800 operation)

Normal

—

F04

lllll

Discharge temp. sensor (TD) error

Heat exchanger temp. sensor (TE) error

Heat exchanger temp. sensor (TL) error

Outside temp. sensor (TO) error

Suction temp. sensor (TS) error

Heat sink temp. sensor (TH) error

Heat exchanger sensor (TE, TS) miswiring

Ps sensor error

ll ll

F06

¥¥

¥¥¥

F06, F07

F08

¥ ¡

lll l

¥¥ ¡

ll l

F06, F12

F13, L29

F06, F15

F23, H06

F31, L29

H01

¡¡

¥ ¥¥ ¡

l l

¥¥¥¥ ¡

¥¥¥ ¥¡

¥¥¥¥¥¡

EEPROM error

Compressor break down

llll

Compressor lock

H02

l lll

¥¥

lll

Current detection circuit error

Case thermostat operation

Low pressure protective operation

Model unset

H03

¡ ¡¡

ll l

H04, P04

H06

ll ll

l¥¥ll¡

¥¥

L10, L29

L29

¥ ¥¥¥¡

Communication error between MCU

Other error (Compressor disorder, etc.)

Discharge temp. error

¡¡ ¡¡

Error is not determined.

P03

¥¥¥¥¥¡

¥¥

lll

High pressure SW system error

Power supply error

P04

ll ll

P04, P05

P07, L29

P15, L29

P19, L29

P04, P20

P22

¥ ¥

l ll

Heat sink overheat error

¥¥¥

Gas leak detection

¥¥¥¥ ¡

¥¡

¡¡¡ ¡¡

4-way valve reverse error

¥¥

¥ ¥¡

High pressure protective operation

Fan system error

ll l

¥¥ ¥¡

l l

¥ ¥¥¡

Driving element short-circuit

Position detection circuit erro

P26

P29

¥ ¥¥¥¡

∗ As the error code displayed on the wired remote controller may differ according to type of indoor model, multiple

codes are described.

– 85 –

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3) Sensor, current, compressor operation frequency, PMV opening display

The values detected by the controller, such as temperature sensor or current value are simply confirmed.

(Legend)

D800

D801

D803

D804

D802

D805

: Go on

l ^{: Go off,}

(Yellow) (Yellow) (Yellow) (Yellow) (Yellow) (Green)

Compressor

operation

frequency

(rpm)

Temperature sensor (°C)

PMV

Current

(A)

Pressure

(kg/cm²G)

SW803

opening

(Pulse)

Item

setup

SW803

TCJ

SW803

LED

display

0 to 0.9

1 to 1.9

0 to 4

5 to 9

0 to 19

–2

–1

Below –25

–25 to –21

–20 to –16

–15 to –11

–10 to – 5

–5 to –1

0 to 4

lllll

20 to 39

40 to 59

llll

2 to 2.9

10 to 14

15 to 19

20 to 24

25 to 29

30 to 34

35 to 39

40 to 44

45 to 49

50 to 54

55 to 59

60 to 64

65 to 69

70 to 74

75 to 79

80 to 84

85 to 89

80 to 84

95 to 99

l lll

3 to 3.9

60 to 79

¡¡

lll

4 to 4.9

80 to 99

ll ll

5 to 5.9

100 to 119

120 to 139

140 to 159

160 to 179

180 to 199

200 to 219

220 to 239

240 to 259

260 to 279

280 to 299

300 to 319

320 to 339

340 to 359

360 to 379

380 to 399

¡ ¡

l ll

6 to 6.9

¡¡

¡¡¡

7 to 7.9

5 to 9

8 to 8.9

10 to 14

15 to 19

20 to 24

25 to 29

30 to 34

35 to 39

40 to 44

45 to 49

50 to 54

55 to 59

60 to 64

65 to 69

70 to 74

75 to 79

80 to 84

85 to 89

90 to 94

95 to 99

100 to 104

105 to 109

110 to 114

115 to 119

Over 120

¡ ¡

lll l

9 to 9.9

¡ ¡

ll l

¡ ¡ ¡

l l l

10 to 10.9

11 to 11.9

12 to 12.9

13 to 13.9

14 to 14.9

15 to 15.9

16 to 16.9

17 to 17.9

18 to 18.9

19 to 19.9

¡¡ ¡ ¡

l l

¡¡ ¡

¡ ¡¡ ¡

¡¡¡ ¡

¡¡¡¡ ¡

¡¡

llll

lll

l ll

¡¡

20 to 20.9 100 to 104 400 to 419

21 to 21.9 105 to 109 420 to 439

22 to 22.9 110 to 114 440 to 459

23 to 23.9 115 to 119 460 to 479

24 to 24.9 120 to 124 480 to 499

¡ ¡¡

ll l

¡ ¡ ¡¡

l l

¡¡ ¡¡

¡¡¡ ¡¡

¡¡¡

lll

25 to 25.9 125 to 129

26 to 26.9 130 to 134

27 to 27.9 135 to 139

28 to 28.9 140 to 144

29 to 29.9 145 to 149

30 to 30.9 150 to 154

500

—

¡¡¡

¡ ¡¡¡

l l

¡¡ ¡¡¡

¡¡¡¡

¡ ¡¡¡¡

¡¡¡¡¡

¡¡¡¡¡¡

Over 31

Over 155

29 or more

Sensor error, unconnected

∗ As TD, TL and TH are sensors for high temperature, there is error at normal temperature or below position.

∗ For current value, the current for the outdoor unit only is displayed.

– 86 –

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4) Specific operation for maintenance check (SW801, SW804)

The following specific operations for the maintenance check are performed by operation of SW801 or

SW804.

a) Select DIP switch SW804. (See table below)

b) Push the pushdown button switch SW801 for approx. 1 second.

c) The following functions start. While each function starts, LED D805 (Green) flashes.

d) When pushing the pushdown button switch SW801 again for approx. 1 second, when selecting DIP

switch SW804 or when the specified time of each function elapsed, each function stops and

LED D805 (Green) returns to the continuous lighting.

SW804

Operation when pushdown button switch SW801 is pushed

Refrigerant recovery operation

SW804

The outdoor unit performs cooling operation.

The indoor unit does not work by this operation alone.

Therefore operate the fan beforehand.

Indoor cooling test run demand

The cooling test run is performed. (→ Note 1)

SW804

Indoor heating test run demand

The heating test run is performed. (→ Note 1)

SW804

Fan motor forced operation

Drive the fan motor forcedly.

When pushing SW801 again or when 2 minutes elapsed,

the operation returns to the normal control.

SW804

PMV full open operation

Open PMV (Pulse Motor Valve) fully.

When pushing SW801 again or when 2 minutes elapsed,

the operation returns to the normal control.

SW804

[NOTE]

Although these operations can

be performed even during

operation, basically perform

operation while the unit stops.

PMV full close operation

Close PMV (Pulse Motor Valve) fully.

When pushing SW801 again or when 2 minutes elapsed,

the operation returns to the normal control.

If performing this operation

during driving the unit, it is

dangerous because the

SW804

pressure may change suddenly.

PMV middle opening operation

Set PMV (Pulse Motor Valve) to middle opening.

When pushing SW801 again or when 2 minutes elapsed,

the operation returns to the normal control.

SW804

Note 1) Indoor cooling test run demand / Indoor heating test run demand

Only when combining with the following indoor unit, cooling/heating operation can be performed from the

outdoor unit.

Test run is available: Indoor unit of 4 series and after (RAV-SM

4UT-E etc.)

∗∗∗

Test run is unavailable: Indoor units other than the above-mentioned indoor units, or indoor units other

than above-mentioned indoor units are included in the twin, triple, double twin connection.

Note 2) The forced test run by this setting cannot be cleared on the indoor remote controller.

Be sure to clear the test run by operation of the outdoor unit. (Push SW801 again for 1 second.)

– 87 –

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SW804

Operation when pushdown button switch SW801 is pushed

4-way valve relay operation (For RY700, CN70 check)

SW804

Turn on 4-way valve power relay (RY700).

When pushing SW801 again or when 2 minutes elapsed,

the operation returns to the normal control.

SV valve relay operation (For RY702, CN702 check)

Turn on SV valve relay (RY702).

When pushing SW801 again or when 2 minutes

elapsed, the operation returns to the normal control.

SW804

[CAUTION]

Although these operations can

be performed even during

operation, basically perform

operation while the unit stops.

Heater output relay operation

(For check RY703, CN703 check)

Turn on relay for option heater (RY703).

When pushing SW801 again or when 2 minutes

elapsed, the operation returns to the normal control.

SW804

If performing this operation

during driving the unit, it is

dangerous because the

pressure may change suddenly.

Outside output relay operation (RY704, CN704)

Turn on relay for outside output (RY704).

When pushing SW801 again or when 2 minutes

elapsed, the operation returns to the normal control.

SW804

Forced start command

The indoor unit connected to the system is forcedly started.

(The indoor unit starts operation by setting of the operation mode on the remote controller.)

SW804

Forced stop command

The indoor unit connected to the system is forcedly stopped.

SW804

Relay operation change for outside output

SW804

[CAUTION]

Do not use this setting.

– 88 –

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10. ADDRESS SETUP

10-1. Address Setup Procedure

When an outdoor unit and an indoor unit are connected, or when an outdoor unit is connected to each indoor

unit respectively in the group operation even if multiple refrigerant lines are provided, the automatic address

setup completes with power-ON of the outdoor unit.The operation of the remote controller is not accepted while

automatic address works. (Approx. 4 to 5 minutes)

Setup of line address of outdoor unit,

indoor unit address, and group address

Completion of cabling work

Do you arbitrarily set the

indoor unit address?

YES

(MANUAL)

Is refrigerant line 1 line?

YES

Is group control performed?

YES

(To AUTO address mode)

Do you change setting after

automatic setting at the first time?

YES

Connect one remote controller with

one indoor unit (1 : 1) tentatively with

communication cable.

Turn on power of outdoor unit.

After completion of address

setup, change is to arbitral

address/group manually.

Setup of automatic

address finishes within

4 to 5 minutes.

(

)

Set to all indoor units one by one.

(

)

END

• When the following addresses are not stored in the neutral memory (IC503) on the indoor P.C. board, a test

run operation cannot be performed. (Unfixed data at shipment from factory)

Item code Data at shipment

Setup data range

0001 (No. 1 unit) to 0064 (No. 64 unit)

Line address

0099

0001 (No. 1 unit) to 0064 (No. 64 unit)

Max. value of indoor units in the identical refrigerant line

Indoor unit address

0000 : Individual (Indoor units which are not controlled in a group)

0001 : Master unit (1 indoor unit in group control)

Group address

0099

0002 : Sub unit (Indoor units other than master unit in group control)

– 89 –

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10-2. Address Setup & Group Control

Indoor unit No. : N - n = Outdoor unit line address N (Max. 30) - Indoor unit address n (Max. 64)

Group address : 0 = Single (Not group control)

1 = Master unit in group control

2 = Sub unit in group control

Master unit (= 1) : The representative of multiple indoor units in group operation sends/receives signals to/from

the remote controllers and sub indoor units.

(* It has no relation with an indoor unit which communicates serially with the outdoor units.)

The operation mode and setup temperature range are displayed on the remote controller LCD.

(Except air direction adjustment of louver)

Sub unit (= 2)

: Indoor units other than master unit in group operation

Basically, sub units do not send/receive signals to/from the remote controllers.

(Except errors and response to demand of service data)

Header unit (Representative unit) (Master Twin)

: This unit communicates with the indoor unit (follower) which serial-communicates with the

outdoor units and sends/receives signal (Command from compressor) to/from the outdoor

units as the representative of the cycle control in the indoor units of the identical line address

within the minimum unit which configures one of the refrigerating cycles of Twin.

Follower unit (Subordinate unit) (Sub Twin)

: Indoor units excluding the header unit in Twin

This unit communicates with (Header) indoor unit in the identical line address and performs

control synchronized with (Header) indoor unit.

This unit does not perform the signal send/receive operation with the outdoor units. :

No judgment for serial signal error.

10-2-1. System Configuration

1. Single

2. Twin

Outdoor

Indoor

1-1

Individual

1-1

1-2

Sub/Follower

(Master/Header)

Master/Header

Remote

controller

3. Single group operation

2-1

Sub/Header

1-1

Sub/Header

4-1

3-1

Sub/Header

8-1

Sub/Header

Master/Header

– 90 –

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10-2-2. Automatic Address Example from Unset Address (No miswiring)

1. Standard (One outdoor unit)

1) Single

1-1

Individual

(Master/Sub)

2) Group operation (Twin, Triple operation)

(Multiple outdoor units = Miltiple indoor units only with serial communication)

2-1

Sub/Header

1-1

Sub/Header

1-2

3-1

3-2

3-3

Sub/Follower

Master/Header

Sub/Follower

Only turning on source power supply (Automatic completion)

• Header unit: The header unit receives the indoor unit data (thermo status) of the follower

(Without identical line address & indoor/outdoor serial) and then finally controls the

outdoor compressor matching with its own thermo status.

The header unit sends this command information to the follower unit.

• Follower unit: The follower unit receives the indoor unit data from the header

(With identical line address & indoor/outdoor serial) and then performs the thermo

operation synchronized with the header unit.

The follower unit sends own thermo ON/OFF demand to the header unit.

(Example)

No. 1-1 header unit sends/receives signal to/from No. 1-2 and No. 1-3 follower units.

(It is not influenced by the line 2 or 3 address indoor unit.)

– 91 –

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10-2-3. Automatic Address Example from Unset Address (No miswiring)

1. Standard (One outdoor unit)

1) Single

2) Twin

3) Triple

(1-1)

(1-2)

(1-1)

1-2

(1-2)

(1-3)

1-1

Individual

1-2

Master/Header

1-1

1-3

1-1

Sub/Follower

Sub/Header

Master/Follower

Sub/Follower

(Master/Header)

Only turning on source power supply (Automatic completion)

2. Group operation

(Multiple outdoor units = Multiple indoor units with serial communication only, without twin)

2-1

Sub/Header

1-1

Sub/Header

3-1

8-1

Sub/Header

Master/Header

(Max. : 8 units)

Only turning on source power supply (Automatic completion)

3. Multiple groups operation

Single

Twin

Triple

2-1

Sub/Header

1-1

Sub/Header

2-3

3-1

Sub/Header

3-3

1-2

Sub/Follower

Master/Follower

Sub/Follower

2-1

1-1

1-2

3-1

3-2

3-3

Change is necessary

Manually change addresses of the multiple follower units simultaneously from the remote controller.

– 92 –

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10-3. Remote Controller Wiring

• Strip off approx. 9 mm the wire to be connected.

Simultaneous twin system

• For single system, use non polarity, 2 core wire is

used for wiring of the remote controller.

(0.5 mm² to 2.0 mm² wires)

Remote controller

inter-unit wiring

• For the synchronous twin, triple system, use

2-conre shield wire (Vinyl cord for microphone 0.5

to 2.0 mm²) to conform to the EMC standard.

Remote controller

wiring

Wiring diagram

Indoor side

Indoor/Outdoor

connecting wires

Terminal block for remote controller

wiring of indoor unit

Terminal block

Indoor power

inter-unit wiring

Remote controller

unit

Outdoor side

L1 L2 L3

Remote controller wire

(Procured locally)

380-415 V 3N~, 50Hz

380 V 3N~, 60Hz

∗ For details of wiring/installation of the remote

controller, refer to the Installation Manual enclosed

with the remote controller.

Simultaneous triple and double twin system

Remote controller

inter-unit wiring

Remote controller

inter-unit wiring

Remote controller

inter-unit wiring

Remote controller

wiring

Indoor side

Indoor/Outdoor

connecting wires

Indoor power

inter-unit wiring

Indoor power

inter-unit wiring

Indoor power

inter-unit wiring

Outdoor side

L1 L2 L3

380-415 V 3N~, 50Hz

380 V 3N~, 60Hz

Triple

Double twin

∗ Use 2-core shield wire (MVVS 0.5 to 2.0 mm² or more) for the remote controller wiring in the simultaneous

twin, simultaneous triple and simultaneous double twin systems to prevent noise problems.

Be sure to connect both ends of the shield wire to earth leads.

∗ Connect earth wires for each indoor unit in the simultaneous twin, simultaneous triple and simultaneous

double twin systems.

– 93 –

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10-4. Address Setup (Manual setting from remote controller)

In case that addresses of the indoor units will be

determined prior to piping work after cabling work

(Example of 2-lines cabling)

(Real line: Cabling, Broken line: Refrigerant pipe)

Outdoor

• Set an indoor unit per a remote controller.

• Turn on power supply.

Indoor

A B

Indoor

A B

Indoor

A B

Indoor

A B

Line address → 1

Indoor unit address → 1

Group address → 1

A B

SET

TEST

Push

buttons simultaneously

Remote controller

for 4 seconds or more.

For the above example, perform setting by

connecting singly the wired remote controller

without remote controller inter-unit cable.

(← Line address)

Using the temperature setup

set 12 to the CODE No.

buttons,

Group address

Individual : 0000

Master unit : 0001

In case of group control

Sub unit

: 0002

Using timer time

buttons, set the line address.

SET

Push

button. (OK when display goes on.)

(← Indoor unit address)

Using the temperature setup

buttons, set 13 to the CODE No.

Using timer time

buttons, set 1 to the line address.

SET

Push

button. (OK when display goes on.)

(← Group address)

Using the temperature setup

buttons, set 14 to the CODE No.

Using timer time

buttons, set 0000 to Individual, 0001 to Master unit, and 0002 to sub unit.

SET

Push

button. (OK when display goes on.)

TEST

button.

Setup completes. (The status returns to the usual stop status.)

TEMP.

ON / OFF

TIMER SET

TIME

FAN

SAVE

MODE

VENT

2, 5, 8

3, 6, 9

END 11

FILTER

RESET TEST

SET

SWING/FIX

UNIT LOUVER

4, 7, 10

1 2 3 4 5 6 7 8 9 10 11 END

– 94 –

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10-5. Confirmation of Indoor Unit No. Position

1. To know the indoor unit addresses though position of the indoor unit body is recognized

• In case of individual operation (Wired remote controller : indoor unit = 1 : 1)

(Follow to the procedure during operation)

ON / OFF

Push

button if the unit stops.

button.

UNIT LOUVER

Unit No. 1-1 is displayed on LCD.

TEMP.

ON / OFF

(It disappears after several seconds.)

TIMER SET

TIME

FAN

SAVE

MODE

VENT

Operation

The displayed unit No. indicate line address and

indoor unit address.

FILTER

RESET TEST

SET

SWING/FIX

UNIT LOUVER

(When other indoor units are connected to the

identical remote controller (Group control unit), other

unit numbers are also displayed every pushing

UNIT LOUVER

button.

END

1 2

2. To know the position of indoor unit body by address

• To confirm the unit No. in the group control

(Follow to the procedure during operation) (in this procedure, the indoor units in group control stop.)

The indoor unit numbers in the group control are

successively displayed, and fan, louver, and drain pump

of the corresponding indoor unit are turned on.

(Follow to the procedure during operation)

VENT

TEST

Push

4 seconds or more.

and

buttons simultaneously for

TEMP.

ON / OFF

TIMER SET

TIME

FAN

SAVE

MODE

VENT

• Unit No.

is displayed.

• Fans and louvers of all the indoor units in the

group control operate.

FILTER

RESET TEST

SET

SWING/FIX

UNIT LOUVER

Every pushing

button, the unit numbers

in the group control are successively displayed.

• The unit No. displayed at the first time indicates the

master unit address.

• Fan and louver of the selected indoor unit only

operate.

END

1 2 3

TEST

Push

button to finish the procedure.

All the indoor units in the group control stop.

– 95 –

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Aiming in environmental preservation, it is strictly recommended to clean and maintain the indoor/outdoor units

of the operating air conditioning system regularly to secure effective operation of the air conditioner.

It is also recommended to maintain the units once a year regularly when operating the air conditioner for a long

time.

Check periodically signs of rust or scratches, etc. on coating of the outdoor units.

Repair the defective position or apply the rust resisting paint if necessary.

If an indoor unit operates for approx. 8 hours or more per day, usually it is necessary to clean the indoor/outdoor

units once three months at least.

These cleaning and maintenance should be carried out by a qualified dealer.

Although the customer has to pay the charge for the maintenance, the life of the unit can be prolonged.

Failure to clean the indoor/outdoor units regularly will cause shortage of capacity, freezing, water leakage or

trouble on the compressor.

Object

Part name

Contents of check

Contents of maintenance

Indoor

Outdoor

Heat exchanger

Fan motor

• Blocking with dust, damage check

• Audibility for sound

• Clean it when blocking is found.

• When abnormal sound is heard

• Clean with water if dirty

• Replace if any breakage

—

Filter

• Visual check for dirt and breakage

• Visual check for swing and balance

• Replace fan when swinging or

balance is remarkably poor.

• Check adhesion of dust and external

appearance.

Fan

• If a large dust adheres, clean it with

brush or water.

Suction/

Discharge grille

• Repair or replace it if deformation or

damage is found.

—

• Visual check for dirt and scratch

• Check blocking by dust and dirt of drain

water.

—

Drain pan

• Clean drain pan, Inclination check

• Cleaning/Coating with repair painting

—

Face panel, Louver

• Check dirt and scratch.

• Check rust and pealing of insulator

External appearance

• Coating with repair painting

• Check pealing and floating of coating film

– 96 –

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Digital Inverter

11. INSTALLATION MANUAL

1 ACCESSORY PARTS

Please read this Installation Manual carefully before installing the Air Conditioner.

• This Manual describes the installation method of the outdoor unit.

„ Accessory Parts

• For installation of the indoor unit, follow the Installation Manual attached to the indoor unit.

Part name

Installation manual

Q’ty

Shape

Usage

(Hand this directly to the customer.)

ADOPTION OF NEW REFRIGERANT

Drain nipple

This Air Conditioner is a new type that has adopted a new refrigerant HFC (R410A) instead of the conven-

tional refrigerant R22 in order to prevent destruction of the ozone layer.

Waterproof rubber cap

This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or

equal to Ssc (∗1) at the interface point between the user’s supply and the public system.

It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution

network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc

greater than or equal to Ssc (∗1).

Protective bush

For protecting wires (pipe cover)

Guard material for passage part

For protecting passage part (pipe cover)

Ssc (∗1)

For conforming to EMC standards

(Used for power wire)

Clamp filter

Model

Ssc (MVA)

1.41

RAV-SM2244AT8(Z)(ZG)-E

RAV-SM2804AT8(Z)(ZG)-E

Ø19.1 mm pipe

For the pipe inside the outdoor unit

For connecting the pipe

1.72

Joint (Ø19.1 – Ø25.4 mm)

Joint (Ø25.4 – Ø28.6 mm)

Elbow

For connecting the pipe

Contents

ACCESSORY PARTS .................................................................................................. 2

SAFETY PRECAUTIONS ............................................................................................ 3

INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER ................................ 4

INSTALLATION CONDITIONS .................................................................................... 6

REFRIGERANT PIPING ............................................................................................ 10

AIR PURGING ........................................................................................................... 14

ELECTRICAL WORK ................................................................................................ 17

EARTHING ................................................................................................................ 19

FINISHING ................................................................................................................. 20

INFORMATION

•

The main pipe on the gas side of this outdoor unit has a diameter of Ø28.6 mm, but a Ø19.1 mm flare connection is used

where the valve is connected. Be sure to use the Ø19.1 mm pipe and joint provided as accessories for the pipe connection.

Before installing the unit, check that the unit has the correct model name to prevent the wrong unit from being installed in the

wrong place.

•

Before proceeding to weld the refrigerant pipe, be sure to pass nitrogen through the pipe.

Before installing the indoor units, read the instructions in the installation manual provided with the indoor units.

Before installing a branch pipe, read the instructions in the installation manual provided with the branch pipe kit.

In the case of a simultaneous double twin system, use indoor unit with the same capacity for all four indoor units.

Branch pipe kit

RAV-SM2244 RBC-DTWP101E

RAV-SM2804 RBC-DTWP101E

Combination indoor unit

SM56 u 4 units

SM80 u 4 units

10 TEST RUN ................................................................................................................. 20

11 ANNUAL MAINTENANCE......................................................................................... 20

12 AIR CONDITIONER OPERATING CONDITIONS ..................................................... 20

13 FUNCTIONSTO BE IMPLEMENTED LOCALLY ...................................................... 21

14 TROUBLESHOOTING ............................................................................................... 22

15 APPENDIX................................................................................................................. 24

•

P.C. board settings are required for some of the indoor units if they are to be used in a twin, triple or double twin system.

Refer to the instructions in the installation manual of the branch pipe kit, and ensure that the settings are selected correctly.

Combination with the indoor units

Combination with the indoor units is possible only when units with the same type are combined. Combinations of units with

different types cannot be used.

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•

Install the refrigerant pipe securely during the installation work before operating the air conditioner.

If the compressor is operated with the valve open and without the refrigerant pipe, the compressor sucks air and the

refrigeration cycle is overpressurized, which may cause a burst or injury.

When carrying out the pump-down work, shut down the compressor before disconnecting the refrigerant pipe.

Disconnecting the refrigerant pipe with the service valve left open and with the compressor still operating will cause air, etc.

to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in

rupturing, injury, etc.

SAFETY PRECAUTIONS

•

Ensure that all Local, National and International regulations are satisfied.

Read these “SAFETY PRECAUTIONS” carefully before installation.

The precautions described below include important items regarding safety.

Observe them without fail.

•

After the installation work, perform a trial operation to check for any problem.

Follow the Owner’s Manual to explain to the customer how to use and maintain the unit.

Ask the customer to keep the Installation Manual together with the Owner’s Manual.

CAUTION

WARNING

•

Do not climb onto or place objects on top of the outdoor unit.

You may fall or the objects may fall off of the outdoor unit and result in injury.

•

Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.

Perform installation work properly according to the Installation Manual.

Inappropriate installation may result in water leakage, electric shock or fire.

Wear heavy gloves during the installation work to avoid injury.

Be sure to connect earth wire (grounding work).

Incomplete grounding cause an electric shock.

Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.

Turn off the main power supply switch or breaker before attempting any electrical work and maintenance.

Make sure all power switches are off. Failure to do so may cause electric shock.

Use an exclusive power circuit for the air conditioner. Use the rated voltage.

To Disconnect the Appliance from the 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.

A 25 A installation fuse (all fuse types can be used) must be used for the power supply line of this conditioner.

•

Connect the connecting wire correctly.

If the connecting wire is incorrect, electric parts may be damaged.

When moving the air conditioner for installation to another place, be very careful not to allow the specified

refrigerant (R410A) to become mixed with any other gaseous body into the refrigeration cycle.

If air or any other gas mixes with the refrigerant, the gas pressure in the refrigeration cycle will become abnormally high and

it may result in the pipe bursting or personal injuries.

INSTALLATION OF NEW REFRIGERANT AIR

CONDITIONER

•

Do not modify this unit by removing any of the safety guards or by by-passing any of the safety interlock switches.

Do not touch the intake or aluminum fins of the outdoor unit.

Doing so may result in injury.

Tighten the flare nut with a torque wrench in the specified manner.

CAUTION

•

Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in refrigerant

leakage.

New Refrigerant Air Conditioner Installation

•

THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE

LAYER.

•

Install the air conditioner securely in a location where the base can sustain the weight of the unit adequately.

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.

If refrigerant gas has leaked during the installation work, ventilate the room immediately.

If the leaked refrigerant gas comes in contact with fire, noxious gas may be generated.

After the installation work, confirm that refrigerant gas does not leak.

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure

of R410A refrigerant is approx. 1.6 times as that of refrigerant R22. Accompanied with the adoption of the new refrigerant, the

refrigerant oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or

refrigerant oil does not enter the new type refrigerant R410A air conditioner cycle.

•

To prevent mixing of refrigerant or refrigerant oil, the sizes of connecting sections of charging port on main unit and installation

tools are different from those of the conventional refrigerant units. Accordingly, special tools are required for the new refrigerant

(R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings made for R410A only, so

that water and/or dust does not enter.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may be generated.

Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure

the air conditioner uses an exclusive power supply.

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.

•

When the air conditioner cannot cool or heat a room well, contact the dealer from whom you purchased the air

conditioner as refrigerant leakage is considered as the cause.

In the case of repair that requires refill of refrigerant, ask service personnel about details of the repair.

The refrigerant used in the air conditioner is harmless.

Generally, the refrigerant does not leak. However, if the refrigerant leaks in a room and a heater or stove burner in the room

catches fire, it may generate toxic gas.

When you ask service personnel for repairing refrigerant leakage, confirm that the leakage portion has been completely

repaired.

•

Conform to the regulations of the local electric company when wiring the power supply.

Inappropriate grounding may cause electric shock.

Do not install the air conditioner in a location that may be subjected to a risk of exposure to a combustible gas.

If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.

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„ Required Tools/Equipment and Precautions for Use

Prepare the tools and equipment listed in the following table before starting the installation work.

Newly prepared tools and equipment must be used exclusively.

INSTALLATION CONDITIONS

Earthing

WARNING

„ Before installation

Be sure to prepare to the following items before installation.

Legend

: Prepared newly (Use for R410A only. Do not use for refrigerant R22 or R407C etc.)

: Conventional tools/equipment are available

Length of refrigerant pipe

Make sure that proper earthing is provided.

Improper earthing may cause an electric shock. For details

on how to check earthing, contact the dealer who installed

the air conditioner or a professional installation company.

Tools/equipment

Gauge manifold

Use

How to use tools/equipment

Prepared newly for R410A only

connected to indoor/

outdoor unit

Item

Vacuuming/charging refrigerant

and operation check

Addition of refrigerant is

unnecessary at the local site.

Charging hose

7.5 to 30 m

*31 to 70 m

•

Proper earthing can prevent charging of electricity on the

outdoor unit surface due to the presence of a high

frequency in the frequency converter (inverter) of the

outdoor unit, as well as prevent electric shock. If the

outdoor unit is not properly earthed, you may be exposed

to an electric shock.

Unusable (Use the refrigerant charging measure

instead.)

If the total length of the

refrigerant pipe exceeds

30 m, add refrigerant in the

amount given in the “Adding

additional refrigerant”.

Charging cylinder

Can not be used

Gas leak detector

Vacuum pump

Gas leak check

Vacuum drying

Prepared newly

Unusable

•

Be sure to connect the earth wire (grounding work).

Incomplete grounding can cause an electric shock.

Do not connect ground wires to gas pipes, water pipes,

lightning rods or ground wires for telephone wires.

Vacuum pump with backflow

prevention function

Vacuum drying

Do not connect a refrigerant pipe that is shorter than

7.5 m.

This may cause a malfunction of the compressor or other

devices.

R22 (Conventional tools)

Flare tool

Flare machining of pipes

Bending pipes

Usable if dimensions are adjusted.

R22 (Conventional tools)

Bender

Test Run

Airtight test

Refrigerant recovery equipment

Torque wrench

Pipe cutter

Refrigerant recovery

Tightening flare nuts

Cutting pipes

For R410A only

Turn on the leakage breaker at least 12 hours before starting

a test run to protect the compressor during startup.

1. Before starting an airtight test, further tighten the spindle

valves on the gas and liquid sides.

2. Pressurize the pipe with nitrogen gas charged from the

service port to the design pressure (4.15 MPa) to

conduct an airtight test.

Exclusive for Ø12.7 mm and Ø19.1 mm

R22 (Conventional tools)

CAUTION

Welding machine and nitrogen

cylinder

Incorrect installation work may result in a malfunction or

complaints from customers.

Welding pipes

R22 (Conventional tools)

3. After the airtight test is completed, evacuate the nitrogen

gas.

Refrigerant charging measure

Charging refrigerant

Air purge

•

To purge air, use a vacuum pump.

„ Refrigerant Piping

Do not use refrigerant charged in the outdoor unit to

purge air. (The air purge refrigerant is not contained in

the outdoor unit.)

New refrigerant (R410A)

When using the conventional piping

Electrical wiring

•

When using the conventional piping with no indication of applicable refrigerant types, be sure to use it with a wall thickness

of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, with a wall thickness of 1.0 mm for Ø15.9 mm, with a wall thickness of

1.2 mm for Ø19.1 mm, and with a wall thickness of 1.0 mm for Ø28.6 mm (half hard). Do not use the conventional piping with

a wall thickness less than these thicknesses due to insufficient pressure capacity.

•

Be sure to fix the power wires and indoor/outdoor

connecting wires with clamps so that they do not come

into contact with the cabinet, etc.

When using general copper pipes

•

Use general copper pipes with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, with a wall thickness of

1.0 mm for Ø15.9 mm, with a wall thickness of 1.2 mm for Ø19.1 mm, and with a wall thickness of 1.0 mm for Ø28.6 mm

(half hard).

Do not use any copper pipes with a wall thickness less than these thicknesses.

Flare nuts and flare machining

•

The flare nuts and flare machining are different from those for the conventional refrigerant.

Use the flare nuts supplied with the air conditioner or those for R410A.

•

Before performing flare machining, carefully read “REFRIGERANT PIPING”.

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Digital Inverter

Obstacle in front

„ Installation Location

„ Necessary Space for Installation

(Unit: mm)

CAUTION

Above unit is free

1. Single unit installation

WARNING

1. Install the outdoor unit in a location where the discharge

air is not blocked.

2. When an outdoor unit is installed in a location that is

always exposed to strong winds like a coast or on the

high stories of a building, secure normal fan operation by

using a duct or wind shield.

3. When installing the outdoor unit in a location that is

constantly exposed to strong winds such as on the upper

stairs or rooftop of a building, apply the windproofing

measures referred to in the following examples.

1) Install the unit so that its discharge port faces the

wall of the building.

Obstacle at rear side

Install the outdoor unit properly in a location that is

durable enough to support the weight of the outdoor

unit.

Insufficient durability may cause the outdoor unit to fall,

which may result in injury.

Upper side is free

1. Single unit installation

This outdoor unit has a weight of about 135 kg. Pay special

attention when installing the unit onto a wall surface.

2. Serial installation of two or more units

2. Obstacles on both right and left sides

CAUTION

Keep a distance 500 mm or more between the unit

and wall surface.

The height of the

Do not install the outdoor unit in a location that is

subject to combustible gas leaks.

Accumulation of combustible gas around the outdoor unit

may cause a fire.

obstacle should be

lower than the height of

the outdoor unit.

500 mm

Obstacle also at the above unit

150 or

250 or

1,000 or

Install the outdoor unit in a location that meets the

following conditions after the customer’s consent is

obtained.

3. Serial installation of two or more units

•

A well-ventilated location free from obstacles near the air

inlets and air outlet

•

A location that is not exposed to rain or direct sunlight

A location that does not increase the operating noise or

vibration of the outdoor unit

2) Consider the wind direction during the operational

season of the air conditioner, and install the unit so

that the discharge port is set at a right angle relative

to the wind direction.

•

A location that does not produce any drainage problems

from discharged water

Obstacles in both front and rear of unit

150 or

250 or

Open above and to the right and left of the unit.

The height of an obstacle in both the front and rear of the

unit, should be lower than the height of the outdoor unit.

The height of the obstacle should be lower than the height

of the outdoor unit.

Do not install the outdoor unit in the following locations.

•

A location with a saline atmosphere (coastal area) or one

that is full of sulfide gas (hot-spring area) (Special

maintenance is required.)

A location subject to oil, vapor, oily smoke, or corrosive

gases

A location in which organic solvent is used

A location where high-frequency equipment (including

inverter equipment, private power generator, medical

equipment, and communication equipment) is used

(Installation in such a location may cause malfunction of

the air conditioner, abnormal control or problems due to

noise from such equipment.)

A location in which the discharged air of the outdoor unit

blows against the window of a neighboring house

A location where the operating noise of the outdoor unit is

transmitted

Standard installation

1. Single unit installation

Obstacle also above unit

Strong wind

•

Strong wind

150 or

•

When using an air conditioner under low outside

temperature conditions (Outside temp:-5 °C or lower)

in COOL mode, prepare a duct or wind shield so that it

is not affected by the wind.

•

2. Serial installation of two or more units

When the outdoor unit is installed in an elevated position,

be sure to secure its feet.

A location in which drain water poses any problems.

Wind shield

250 or

200 or

Wind shield

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Digital Inverter

Serial installation in front and rear

NO GOOD

REFRIGERANT PIPING

Open above and to the right and left of the unit.

The height of an obstacle in both the front and rear of the unit

should be lower than the height of the outdoor unit.

Do not support the

outdoor unit only

with the fixing leg.

If only the end of the

fixing leg is supported,

it may deform.

„ Knockout of Pipe Cover

„ Optional Installation Parts

(Locally procured)

Standard installation

Knockout procedure

Foundation

Parts name

Q’ty

Set the out margin of the anchor bolt to 15 mm or less.

15 or less

Refrigerant piping

Liquid side: Ø12.7 mm

Gas side: Ø19.1 mm (Approx. 800 mm)

One each

1,000 or

300 or

1,500 or

2,000 or

200 or

Ø28.6 mm

Pipe insulating material

(polyethylene foam, 10 mm thick)

•

When water is to be drained through the drain hose,

attach the following drain nipple and waterproof rubber

cap, and use the drain hose (Inner diam: 16 mm) sold on

the market. Also seal the knockout hole and screws

securely with silicone material, etc., to prevent water from

leaking.

Putty, PVC tape

One each

„ Installation of Outdoor Unit

•

Before installation, check the strength and horizontalness

of the base so that abnormal sounds do not emanate.

According to the following base diagram, fix the base

firmly with the anchor bolts.

REQUIREMENT

Rear direction

•

Follow the instructions in the installation manual provided

with the branch pipe kit and the instructions in the installation

manual of the indoor unit to connect the refrigerant pipe

between the branch pipe and indoor unit.

Some conditions may cause dewing or dripping of water.

When collectively draining discharged water completely,

use a drain pan.

Pipe cover

•

(Anchor bolt, nut: M10 x 4 pairs)

Side direction

150

600

150

Front direction

Down direction

430

Drain hole

•

The indoor/outdoor connecting pipes can be connected

in 4 directions.

Waterproof rubber cap

„ Refrigerant Piping Connection

(1 pc.)

Knockout

hole

Drain nipple

Take off the knockout part of the pipe cover through

which pipes or wires will pass through the base plate.

Detach the pipe cover and tap on the knockout section a

few times with the shank of a screwdriver. A knockout

hole can easily be punched.

As shown in the figure below, it is easier to punch out the

knockout hole when the pipe cover is left in place rather

than when the cover is removed from the unit.

In knocking out the hole, the knockout section can easily

be removed by hand once the bottom of the three

locations where the section is joined along the guide lines

is broken using a screwdriver.

After punching out the knockout hole, remove burrs from

the hole, and install the protective bush and guard

material around the passage hole provided as

accessories in order to protect the wires and pipes. Also

be sure to attach the pipe covers after connecting the

pipes. The pipe covers can be easily attached by cutting

off the slits at the lower part of the covers.

CAUTION

•

Please pay attention to the drain in region with snowfall

and cold temperature, as it may be frozen and cause

drainage problems. Punch the knockout holes on the

base plate to improve drainability. Use a screwdriver and

take off the knockout part outward.

•

TAKE NOTE OF THESE 4 IMPORTANT POINTS BELOW

FOR PIPING WORK

1. Keep dust and moisture away from inside the connecting

pipes.

2. Tightly connect the connection between pipes and the

unit.

3. Evacuate the air in the connecting pipes using a

VACUUM PUMP.

Drain nipple mounting hole

•

As shown in the figure below, install the foundation and

vibration-proof rubber pads to directly support the bottom

surface of the fixing leg that is in contact with and

underneath the bottom plate of the outdoor unit.

When installing the foundation for an outdoor unit with

downward piping, consider the piping work.

4. Check for gas leaks at connection points.

GOOD

•

Absorb vibration

with vibration-proof

rubber pads

Piping connection

Liquid side

Knockout hole

Waterproof rubber cap

Drain nipple

Fixing leg

Outer diameter

Thickness

Foundation

Ø12.7 mm

0.8 mm

GOOD

Gas side

Outer diameter

Ø19.1 mm

Thickness

1.2 mm

„ For Reference

Bottom plate of

outdoor unit

If a heating operation is to be continuously performed for a

long time under the condition that the outdoor temperature is

0 °C or lower, draining defrosted water may be difficult due to

the bottom plate freezing, resulting in trouble with the cabinet

or fan.

It is recommended to procure an anti-freeze heater locally in

order to safely install the air conditioner.

For details, contact the dealer.

Ø28.6 mm

1.0 mm (half hard)

Foundation

Support the bottom surface of the

fixing leg that is in contact with and

underneath the bottom plate of the

outdoor unit.

REQUIREMENT

Be sure to wear heavy work gloves while working.

On the gas side, be sure to use the Ø19.1 mm pipe provided

with the outdoor unit.

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Digital Inverter

Flaring

Digital Inverter

•

After the installation work, be sure to check for gas leaks

of the pipe connections with nitrogen.

Pressure of R410A is higher than that of R22 (Approx.

1.6 times).

Therefore, using a torque wrench, tighten the flare pipe

connecting sections that connect the indoor/outdoor units

at the specified tightening torque.

Incomplete connections may cause not only a gas leak,

but also trouble with the refrigeration cycle.

„ Connecting the Gas Side Pipe

„ Tightening of Connecting Part

1. Cut the pipe with a pipe cutter.

1. Align the centers of the connecting pipes and fully tighten

the flare nut with your fingers. Then fix the nut with a

wrench as shown in the figure and tighten it with a torque

wrench.

Be sure to remove burrs that may cause a gas leak.

2. Insert a flare nut into the pipe, and then flare the pipe.

Use the flare nuts supplied with the air conditioner or

those for R410A.

Insert a flare nut into the pipe, and flare the pipe.

As the flaring sizes of R410A differ from those of

refrigerant R22, the flare tools newly manufactured for

R410A are recommended.

REQUIREMENT

•

Be sure to use the Ø19.1 mm pipe and joint provided as

accessories of the outdoor unit to connect the gas side

Ø19.1 mm pipe and Ø28.6 mm pipe.

Half union or packed valve

Flare nut

•

When leading out the pipes toward the front, to one of the

sides or toward the rear, use the Ø19.1 mm pipe and

elbow provided as accessories of the outdoor unit, and

adjust the bending direction. Cut the Ø19.1 mm pipe to

the required length before using it.

Do not apply refrigerant oil to the flared surface.

Externally

threaded side

Internally threaded

side

However, the conventional tools can be used by

adjusting the projection margin of the copper pipe.

Fix with wrench.

Tighten with torque wrench.

„ Branch Pipe

Carry out the refrigerant piping work using the branch pipe kit

which is purchased separately.

Projection margin in flaring: B (Unit: mm)

2. As shown in the figure, be sure to use two wrenches to

loosen or tighten the flare nut of the valve on the gas

side. If you use a single crescent, the flare nut cannot be

tightened to the required tightening torque.

On the other hand, use a single crescent to loosen or

tighten the flare nut of the valve on the liquid side.

1. Align the provided Ø19.1 mm pipe with the pipe lead-out

direction, and shape it so that its end comes out from the

outdoor unit.

2. On the outside of the outdoor unit, use the provided

joints, and braze the Ø19.1 mm pipe and Ø28.6 mm pipe.

Branch pipe installation

The ends of the branch pipes

form a line perpendicular to

the ground.

The ends of the branch

pipes form a line

perpendicular to the ground.

Rigid (Clutch type)

(Unit: N•m)

Conventionaltool

Outer dia. of copper pipe

9.5 mm (diam.)

Tightening torque

33 to 42 (3.3 to 4.2 kgf•m)

50 to 62 (5.0 to 6.2 kgf•m)

68 to 82 (6.8 to 8.2 kgf•m)

100 to 120 (10.0 to 12 kgf•m)

Both the collecting

pipe and branch

pipes form a line

R410A tool used

R410A

Outer diam. of

copper pipe

used

Both the collecting

pipe and branch

pipes form a line

parallel to the ground.

12.7 mm (diam.)

parallel to the ground.

9.5

15.9 mm (diam.)

Joint (accessory)

12.7

15.9

19.1

1.0 to 1.5

19.1 mm (diam.)

0 to 0.5

Joint

(accessory)

Branch pipe

Cover

Branch pipe

Flaring diameter size: A (Unit: mm)

Collecting pipe

Gas side

Ø19.1 mm pipe

(accessory)

Collection area

Liquid side

Cap

Ø28.6 mm pipe

(procured locally)

Piping valve

Tightened

Loosened

Inclined

Make sure that the pipes are

installed level after branching.

NO GOOD

Ø19.1 mm pipe

: Brazing

(accessory)

Outer diam. of copper pipe

–0.4

Ø19.1 mm pipe

Brazing

9.5

13.2

16.6

19.7

24.0

Flare nut

(accessory)

Length of straight sections on main pipe side of

branch pipe

12.7

15.9

19.1

Valve at gas side

Provide a straight section with a length of at least 500 mm on

the main pipe side of the branch pipe. (Same for both liquid

side and gas side)

CAUTION

Elbow (accessory)

Ø19.1 mm pipe

(accessory)

1. Do not put the crescent wrench on the cap or cover.

The valve may break.

In case of flaring for R410A with the conventional flare

tool, pull the tool out approx. 0.5 mm more than that for

R22 to adjust it to the specified flare size.

The copper pipe gauge is useful for adjusting the

projection margin size.

2. If applying excessive torque, the nut may break

according to some installation conditions.

REQUIREMENT

•

Before proceeding to weld the refrigerant pipe, be sure to

pass nitrogen through the pipe to prevent oxidation inside

it. If nitrogen is not passed through the pipe, the

refrigerating cycle may become clogged by oxidized

scales.

Cover

500 mm

or more

500 mm

or more

•

The Ø28.6 mm pipe cannot be passed through the pipe

cover and knockout hole in the base plate so be sure to

connect the Ø19.1 mm pipe and Ø28.6 mm pipe outside

the outdoor unit.

NO GOOD

Cap

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Digital Inverter

„ Refrigerant Pipe Length

AIR PURGING

Simultaneous twin, triple

Allowable pipe length (m)

Branch piping Branch piping

Height difference (m)

Indoor-outdoor H

Vacuum pump

„ Airtight Test

Total length

Before starting an airtight test, further tighten the spindle

valves on the gas side and liquid side.

Pressurize the pipe with nitrogen gas charged from the

service port to the design pressure (4.15 MPa) to conduct

the airtight test.

Outdoor

unit

•

1 +

•

3 –

4 –

As shown in the figure, connect the charge hose after the

manifold valve is closed completely.

Indoor-indoor

Indoor unit:

Upper

Outdoor unit:

Upper

('h)

Maximum

Attach the connecting port of the charge hose with a

projection to push the valve core (setting pin) to the charge

port of the set.

SM2244

SM2804

0.5

After the airtight test is completed, evacuate the nitrogen

gas.

Pipe diameter (mm)

Outdoor

unit

Number of bent

portions

Main pipe

Branch piping

„ Air Purge

With respect to the preservation of the terrestrial

environment, adopt “Vacuum pump” to purge air (Evacuate

air in the connecting pipes) when installing the unit.

Open Handle Low fully.

Gas side

Liquid side

Gas side

Liquid side

SM2244

SM2804

Ø28.6

Ø12.7

Ø15.9

Ø9.5

10 or less

Turn ON the vacuum pump. (*1)

•

Do not discharge the refrigerant gas to the atmosphere to

preserve the terrestrial environment.

Figure of Simultaneous twin

Figure of Simultaneous triple

Loosen the flare nut of the packed valve (Gas side) a little to

check that the air passes through. (*2)

Indoor Unit

•

Use a vacuum pump to discharge the air (nitrogen, etc.)

that remains in the set. If air remains, the capacity may

decrease.

Indoor Unit

For the vacuum pump, be sure to use one with a backflow

preventer so that the oil in the pump does not backflow into

the pipe of the air conditioner when the pump stops.

(If oil in the vacuum pump is put in an air conditioner

including R410A, it may cause trouble with the refrigeration

cycle.)

Retighten the flare nut.

Outdoor Unit

Execute vacuuming until the compound pressure gauge

indicates –101 kPa (–76 cmHg). (*1)

Compound pressure gauge

Close Handle Low completely.

Pressure gauge

Simultaneous double twin

Total length

–101 kPa

(–76 cmHg)

Gauge manifold valve

Turn OFF the vacuum pump.

Allowable pipe length (m)

Height difference (m)

Indoor-outdoor H

Handle Low

Branch piping

Handle High

(Keep fully closed)

Branch

piping

Branch

piping

• ( 4 + 2) – ( 5 + 2)

• ( 4 + 2) – ( 6 + 3)

• ( 4 + 2) – ( 7 + 3)

• ( 5 + 2) – ( 6 + 3)

• ( 5 + 2) – ( 7 + 3)

• ( 6 + 3) – ( 7 + 3)

Maximum

Leave the vacuum pump as it is for 1 or 2 minutes, and

check that the indicator of the compound pressure gauge

does not return.

Charge hose

(For R410A only)

•

1 + 2 +

1 + 3 +

Outdoor

unit

Charge hose

(For R410A only)

•

4 +

5 +

6 +

7 +

Indoor-

indoor

('h)

Indoor

unit:

Upper

Outdoor

unit:

Upper

Vacuum pump adapter

for counter-flow

prevention

Open the valve stem or valve handle fully. (First, at liquid

side, then gas side)

Maximum

(For R410A only)

Vacuum

pump

SM2244

SM2804

0.5

Charge port

(Valve core (Setting pin))

Disconnect the charge hose from the charge port.

Pipe diameter (mm)

Outdoor

unit

Number of bent

portions

Tighten the valve and caps of the charge port securely.

Main pipe

Branch piping

Packed valve at gas side

Gas side

Ø28.6

Liquid side

Ø12.7

Gas side

2, 3: Ø15.9

4, 5, 6, 7: Ø12.7 4, 5, 6, 7: Ø6.4

Liquid side

Use the vacuum pump, vacuum pump adapter, and gauge

manifold correctly referring to the manuals supplied with each

tool before using them.

Check that the vacuum pump oil is filled up to the specified line

of the oil gauge.

When air is not charged, check again whether the connecting

2, 3: Ø9.5

SM2244

SM2804

10 or less

Ø28.6

Ø12.7

2 to 7: Ø15.9

2 to 7: Ø9.5

Figure of Simultaneous double twin

port of the discharge hose, which has a projection to push the

valve core, is firmly connected to the charge port.

Indoor Unit

Outdoor Unit

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Digital Inverter

Adding additional refrigerant

Figure of Simultaneous twin

„ How to Open the Valve

Open or close the valve.

„ Insulating the Pipes

•

The temperatures at both the liquid side and gas side will

be low during cooling so in order to prevent

condensation, be sure to insulate the pipes at both of

these sides.

Figure of Simultaneous triple

Indoor Unit

Liquid side

Open the valve with a 4 mm hexagon wrench.

Indoor Unit

•

Insulate the pipes separately for the liquid side and gas

side.

Gas side

Outdoor Unit

Insulate the branch pipes by following the instructions in

the installation manual provided with the branch pipe kit.

Use the insulating material provided as an accessory to

insulate the Ø19.1 mm pipe at the gas side.

Seal the area where the Ø19.1 mm pipe and Ø22.2 to

Ø28.6 mm pipe are connected so that no gaps are left.

Valve unit

REQUIREMENT

Using a minus screwdriver,

Figure of Simultaneous double twin

turn it counterclockwise by

90° until it hits the stopper.

(Full open)

Indoor Unit

Be sure to use an insulating material which can withstand

temperatures above 120°C for the gas side pipe since this

pipe will become very hot during heating operations.

Indoor Unit

Charge port

Outdoor Unit

Flare nut

„ Replenishing Refrigerant

This model is a 30 m chargeless type that does not need to

have its refrigerant replenished for refrigerant pipes up to

30 m. When a refrigerant pipe longer than 30 m is used, add

the specified amount of refrigerant.

Handle position

Closed completely

Opened fully

Formula for calculating the amount of additional refrigerant

(Formula will differ depending on the diameter of the liquid connecting side pipe.)

Stopper pin

Refrigerant replenishing procedure

1 to 7 are the lengths of the pipes shown in the figures above (unit: m).

1. After vacuuming the refrigerant pipe, close the valves

and then charge the refrigerant while the air conditioner

is not working.

2. When the refrigerant cannot be charged to the specified

amount, charge the required amount of refrigerant from

the charge port of the valve on the gas side during

cooling.

Simultaneous twin

Amount of additional

refrigerant per meter

(g/m)

Diameter of connecting pipe

(liquid side)

Amount of additional refrigerant (g) =

Amount of refrigerant added for main pipe +

amount of refrigerant added for branch piping

Movable part of valve (Stem)

Main stopper

•

While the valve is fully opened, after the screwdriver has

reached the stopper, do not apply torque exceeding

5 N•m. Applying excessive torque may damage the

valve.

Ø12.7

Ø9.5

D u ( 1 – 28) + Eꢀu ( 2 + 3 – 4)

Requirement for replenishing refrigerant

Simultaneous triple

Diameter of connecting pipe (liquid side)

Replenish liquid refrigerant.

When gaseous refrigerant is replenished, the refrigerant

composition varies, which disables normal operation.

Amount of additional

refrigerant per meter

(g/m)

Amount of additional refrigerant (g) =

Amount of refrigerant added for main pipe +

amount of refrigerant added for branch

piping

Valve handling precautions

•

Open the valve stem until it strikes the stopper.

It is unnecessary to apply further force.

•

Securely tighten the cap with a torque wrench.

Ø12.7

Ø9.5

D u ( 1 – 28) + Eꢀu ( 2 + 3 + 4 – 6)

Cap tightening torque

Ø12.7 mm

Ø19.1 mm

50 to 62 N•m

(5.0 to 6.2 kgf•m)

Simultaneous double twin

Diameter of connecting pipe

(liquid side)

Amount of additional

refrigerant per meter (g/m)

Amount of additional refrigerant (g) =

Amount of refrigerant added for main pipe

+ amount of refrigerant added for first

branch piping + amount of refrigerant

added for second branch piping

Valve size

20 to 25 N•m

(2.0 to 2.5 kgf•m)

Outdoor

unit

14 to 18 N•m

(1.4 to 1.8 kgf•m)

4 to

Charge port

D u ( 1 – 28) + Eꢀu ( 2 + 3 – 4) +

SM2244

SM2804

Ø12.7

Ø9.5

Ø6.4

Ø9.5

Jꢀu ( 4 + 5 + 6 + 7)

D u ( 1 – 28) + Eꢀu ( 2 + 3 – 4) +

Jꢀu ( 4 + 5 + 6 + 7)

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Digital Inverter

How to wire

Wiring diagram

ELECTRICAL WORK

1. Connect the connecting wire to the terminal as identified

with their respective numbers on the terminal block of the

indoor and outdoor units.

For details on the remote controller wiring/installation,

refer to the Installation Manual enclosed with the remote

controller.

•

When the outdoor air temperature drops, power is

supplied to the compressor with the purpose of

preheating the compressor in order to protect it.

Therefore, leave the main power switch at the “on”

setting during the periods when the air conditioner is

being used.

H07 RN-F or 60245 IEC 66 (1.5 mm²or more)

2. When connecting the connecting wire to the outdoor unit

terminal, prevent water from coming into the outdoor unit.

3. Secure the power supply wire and indoor/outdoor

connecting wires using the cord clamp of the outdoor

unit.

WARNING

Simultaneous twin system

1. Using the specified wires, ensure that the wires are

connected, and fix wires securely so that the external

tension to the wires does not affect the connecting

part of the terminals.

Incomplete connection or fixation may cause a fire, etc.

2. Be sure to connect the earth wire (grounding work).

Incomplete grounding may lead to electric shock.

Do not connect ground wires to gas pipes, water pipes,

lightning rods or ground wires for telephone wires.

3. The appliance shall be installed in accordance with

national wiring regulations.

Remote controller

inter-unit wiring

Remote controller

wiring

4. For interconnecting wires, do not use a wire joined to

another on the way.

„ Wiring between Indoor Unit and

Indoor side

Indoor

Use wires long enough to cover the entire length.

5. Wiring connections differ in conformance to EMC

standards, depending whether the system is twin,

triple or double twin. Connect wires according to

respective instructions.

Outdoor Unit

side

1. Figure below shows the wiring connections between the

standard indoor and outdoor units and between the

indoor units and remote controller. The wires indicated by

the broken lines or dot-and-dash lines are provided at the

installation place.

2. Refer to the wiring diagrams of the models concerned for

the internal wiring connections of the outdoor unit and

indoor units.

Indoor/Outdoor

connecting wires

Indoor power

inter-unit wiring

Outdoor side

Capacity shortages of the power circuit or an incomplete

installation may cause an electric shock or fire.

L1 L2 L3

CAUTION

380-415 V 3N~, 50Hz

380 V 3N~, 60Hz

•

An installation fuse must be used for the power supply

line of this air conditioner.

Incorrect/incomplete wiring may lead to an electrical fire

or smoke.

CAUTION

3. There is no need to perform the P.C. board settings for

the indoor units.

•

Wrong wiring may cause a burn-out of some electrical

parts.

Input power

380-415 V 3N~, 50Hz

380 V 3N~, 60Hz

•

Prepare an exclusive power supply for the air conditioner.

This product can be connected to the mains power.

Fixed wire connections:

•

Be sure to use the cord clamps attached to the product.

Do not damage or scratch the conductive core or inner

insulator of the power and inter-connecting wires when

peeling them.

A switch that disconnects all poles and has a contact

separation of at least 3 mm must be incorporated in the

fixed wiring.

Outdoor unit

•

Use the power and Inter-connecting wires with specified

thicknesses, specified types and protective devices

required.

Leakage

breaker

Simultaneous triple and double twin system

•

Remove the panel, and you can see electric parts on the

front side.

A metal pipe can be installed through the hole for wiring.

If the hole size does not fit the wiring pipe to be used, drill

the hole again to an appropriate size.

Remote controller

inter-unit wiring

Remote controller

inter-unit wiring

Remote controller

inter-unit wiring

Indoor unit

(main)

Indoor unit

(secondary)

Indoor unit

(secondary)

Remote controller

wiring

Furthermore, be sure to secure these wires with the pipe

valve fixing plate and cord clamps stored in the electric parts

box.

Indoor side

Remote

controller

Indoor/Outdoor

connecting wires

Side D (Space: 8.5 mm)

Side C (Space: 4 mm)

Indoor power

inter-unit wiring

Indoor power

inter-unit wiring

„ Power and Wiring Specifications

Outdoor side

L1 L2 L3

Model

(RAV-SM Type)

224AT8 280AT8 224AT7 280AT7

•

Secure the indoor/outdoor connecting wires at side C.

Electric parts box

380-415 V 3N~, 50Hz

380 V 3N~, 60Hz

380-415 V 3N~

50 Hz

380 V 3N~

60 Hz

Triple

Power supply

Maximum

running current

18.0 A

25 A

22.0 A

18.0 A

22.0 A

25 A

Double twin

Installation

fuse rating

25 A

Use 2-core shield wire (MVVS 0.5 to 2.0 mm²or more) for the remote controller wiring in the simultaneous twin,

simultaneous triple and simultaneous double twin systems to prevent noise problems. Be sure to connect both ends of the

Cord clamp

Pipe hole

5 u 2.5 mm²or more

shield wire to earth leads.

Power wire*

(H07 RN-F or 60245 IEC 66)

Connect earth wires for each indoor unit in the simultaneous twin, simultaneous triple and simultaneous double twin

systems.

Indoor/outdoor

connecting

wires*

4 u 1.5 mm²or more

(H07 RN-F or 60245 IEC 66)

Number of wire u wire size

Pipe valve fixing plate

Panel

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Digital Inverter

Stripping length power cord and connecting wire

FINISHING

Indoor/outdoor

connecting wire

Power supply wire

L1 L2 ^L3sc^Nrew

L1 L2 L3

After the refrigerant pipe, inter-unit wires, and drain pipe have been connected, cover them with finishing tape and clamp them

to the wall with off-the-shelf support brackets or their equivalent.

Earth

screwEarth

Keep the power wires and indoor/outdoor connecting wires off the valve on the gas side or pipes that have no heat insulator.

(mm)

Earth line

10 TEST RUN

Connecting wire

Power supply wire

Cord clamp

•

Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup.

To protect the compressor, power is supplied from the 380-415 VAC input to the unit to preheat the compressor.

Check the following before starting a test run:

Clamp filter

(accessory)

•

That all pipes are connected securely without leaks.

That the valve is open.

Cord clamp

If the compressor is operated with the valve closed, the outdoor unit will become overpressurized, which may damage the

compressor or other components.

If there is a leak at a connection, air can be sucked in and the internal pressure further increases, which may cause a burst

or injury.

•

Operate the air conditioner in the correct procedure as specified in the Owner’s Manual.

WARNING

Be sure to attach the provided clamp filter to the power

supply wire in order to conform to EMC standards.

11 ANNUAL MAINTENANCE

•

For an air conditioning system that is operated on a regular basis, cleaning and maintenance of the indoor/outdoor units are

strongly recommended.

As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor/outdoor units will need to be cleaned at

least once every 3 months. This cleaning and maintenance should be carried out by a qualified service person.

Failure to clean the indoor/outdoor units regularly will result in poor performance, icing, water leaking and even compressor

failure.

EARTHING

WARNING

12 AIR CONDITIONER OPERATING CONDITIONS

•

Be sure to connect the earth wire. (grounding work)

Incomplete grounding may cause an electric shock.

For proper performance, operate the air conditioner under the following temperature conditions:

Cooling operation

Heating operation

Dry valve temp.

Wet valve temp.

–15°C to 46°C

–20°C to 15°C

Connect the earth line properly following applicable technical standards.

Connecting the earth line is essential to preventing electric shock and to reducing noise and electrical charges on the outdoor

unit surface due to the high-frequency wave generated by the frequency converter (inverter) in the outdoor unit.

If you touch the charged outdoor unit without an earth line, you may experience an electric shock.

If air conditioner is used outside of the above conditions, safety protection may work.

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Digital Inverter

14 TROUBLESHOOTING

13 FUNCTIONS TO BE IMPLEMENTED LOCALLY

You can perform fault diagnosis of the outdoor unit with the LEDs on the P.C. board of the outdoor unit in addition to using the

check codes displayed on the wired remote controller of the indoor unit.

Use the LEDs and check codes for various checks. Details of the check codes displayed on the wired remote controller of the

indoor unit are described in the Installation Manual of the indoor unit.

•

When using a Ø19.1 mm gas pipe for the existing piping,

„ Handling Existing Pipe

When using the existing pipe, carefully check for the

following:

set bit 3 of SW802 (switch for existing pipe) on the P.C.

board of the outdoor unit to ON. In this case, the heating

performance may be reduced depending on the outside

air temperature and room temperature.

•

Wall thickness (within the specified range)

Scratches and dents

Water, oil, dirt, or dust in the pipe

Flare looseness and leakage from welds

Deterioration of copper pipe and heat insulator

Before recovering the refrigerant in the existing system,

perform a cooling operation for at least 30 minutes.

Verifying current abnormal status

SW802

1. Check that DIP switch SW803 is set to OFF.

2. Jot down the states of LED800 to LED804. (Display mode 1)

3. Press SW800 for at least 1 second. The LED status changes to display mode 2.

4. Check the code whose display mode 1 equals the LED states jotted down and display mode 2 equals the current flashing

status of LED800 to LED804 from the following table to identify the cause.

When shipped from factory

When using existing pipe

Cautions for using existing pipe

Verifying an abnormal state in the past although the abnormal state no longer occurs

•

Do not reuse a flare nut to prevent gas leaks.

Replace it with the supplied flare nut and then process it

to a flare.

Blow nitrogen gas or use an appropriate means to keep

the inside of the pipe clean. If discolored oil or much

residue is discharged, wash the pipe.

Check welds, if any, on the pipe for gas leaks.

There may be a problem with the pressure resistance of

the branching pipes of the existing piping. Replace them

with branch pipes (sold separately).

1. Set bit 1 of DIP switch SW803 to ON.

2. Jot down the states of LED800 to LED804. (Display mode 1)

3. Press SW800 for at least 1 second. The LED status changes to display mode 2.

4. Find an error whose display mode 1 equals the LED states jotted down and display mode 2 equals the current flashing

states of LED800 to LED804 from the following table to identify the error.

„ Recovering Refrigerant

Use the refrigerant recovery equipment to recover the

refrigerant.

•

An outside air temperature (TO) sensor error can be checked only while it occurs.

When the pipe corresponds to any of the following, do not

use it. Install a new pipe instead.

•

The pipe has been opened (disconnected from indoor

unit or outdoor unit) for a long period.

The pipe has been connected to an outdoor unit that

does not use refrigerant R22, R410A or R407C.

The existing pipe must have a wall thickness equal to or

larger than the following thicknesses.

Reference outside Wall thickness

Material

diameter (mm)

(mm)

0.8

1.0

1.2

1.0

6.4

9.5

—

12.7

15.9

19.1

22.2

28.6

—

Half hard

•

Do not use any pipe with a wall thickness less than these

thicknesses due to insufficient pressure capacity.

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Digital Inverter

15 APPENDIX

Display mode 1

Display mode 2

No.

Cause

D800 D801 D802 D803 D804 D800 D801 D802 D803 D804

6. When the existing air conditioner is removed after

refrigerant has been recovered.

Check if the oil is judged to be clearly different from

normal oil.

Work instructions

Normal

Discharge (TD) sensor error

The existing R22 and R407C piping can be reused for our

digital inverter R410A product installations.

Heat exchanger (TE) sensor error

Heat exchanger (TL) sensor error

Outside air temperature (TO) sensor error

Suction (TS) sensor error

•

The refrigerator oil is copper rust green in color:

There is the possibility that moisture has mixed with the

oil and rust has been generated inside the pipe.

There is discolored oil, a large quantity of residue, or a

bad smell.

WARNING

Confirming the existence of scratches or dents on the

existing pipes and confirming the reliability of the pipe

strength are conventionally referred to the local site.

•

Heat sink (TH) sensor error

A large quantity of shiny metal dust or other wear

residue can be seen in the refrigerant oil.

Outdoor temperature sensor (TE/TS) connection error

Outdoor EEPROM error

7. When the air conditioner has a history of the compressor

failing and being replaced.

Basic conditions needed to reuse existing pipes

10 Compressor lock

•

When discolored oil, a large quantity of residue, shiny

metal dust, or other wear residue or mixture of foreign

matter is observed, trouble will occur.

Check and observe the presence of three conditions in the

refrigerant piping works.

1. Dry (There is no moisture inside of the pipes.)

2. Clean (There is no dust inside of the pipes.)

3. Tight (There are no refrigerant leaks.)

11 Compressor lock

12 Current detection circuit error

13 Thermostat for compressor activated

14 Model data not set (on the service P.C. board)

15 MCU-MCU communication error

16 Discharge temperature error

17 Abnormal power (open phase detected or abnormal voltage)

18 Heat sink overheat

8. When temporary installation and removal of the air

conditioner are repeated such as when leased etc.

9. If the type of refrigerator oil of the existing air conditioner

is other than the following oil (Mineral oil), Suniso, Freol-

S, MS (Synthetic oil), alkyl benzene (HAB, Barrel-freeze),

ester series, PVE only of ether series.

Restrictions for use of existing pipes

In the following cases, the existing pipes should not be

reused as they are. Clean the existing pipes or exchange

them with new pipes.

1. When a scratch or dent is heavy, be sure to use new

pipes for the refrigerant piping works.

2. When the existing pipe thickness is thinner than the

specified “Pipe diameter and thickness,” be sure to use

new pipes for the refrigerant piping works.

•

The winding-insulation of the compressor may

deteriorate.

NOTE

19 Gas leak detected

20 4-way valve reverse error

The above descriptions are results have been confirmed by

our company and represent our views on our air

conditioners, but do not guarantee the use of the existing

pipes of air conditioners that have adopted R410A in other

companies.

21 High pressure release operation

22 Outdoor fan motor error

•

The operating pressure of R410A is high (1.6 times

that of R22 and R407C). If there is a scratch or dent on

the pipe or a thinner pipe is used, the pressure strength

may be inadequate, which may cause the pipe to break

in the worst case.

23 Compressor driver short-circuit protection

24 Position detection circuit error in one-line display

25 Ps sensor error

Pipe diameter and thickness (mm)

Branching pipe for simultaneous operation system

26 Ps drop down error

Reference outside Wall thickness

•

In the concurrent twin system, when TOSHIBA has

specified that branching pipe is to be used, it can be

reused.

Material

diameter (mm)

(mm)

0.8

1.0

1.2

1.0

(

: OFF : ON : Flashing)

6.4

9.5

—

The LEDs and DIP switches are

located on the lower left of the P.C.

board of the outdoor unit.

Branching pipe model name:

RBC-TWP30E2, RBC-TWP50E2, RBC-TRP100E

On the existing air conditioner for simultaneous operation

system (twin, triple, double twin system), there are cases

of branch pipes being used that have insufficient

compressive strength.

12.7

15.9

19.1

22.2

28.6

—

Enlarged view of

LEDs

SW804

SW805

—

In such case, please change the piping to a branch pipe

for R410A.

Half hard

D805

D804

D803

D802

D801

D800

SW802

SW803

SW800 SW801 SW806

LED

Curing of pipes

3. When the outdoor unit was left with the pipes

disconnected, or the gas leaked from the pipes and the

pipes were not repaired and refilled.

When removing and opening the indoor or outdoor unit for a

long time, cure the pipes as follows:

•

D805

D804

D803

D802

D801

D800

Otherwise rust may be generated when moisture or

foreign matter due to condensation enters the pipes.

The rust cannot be removed by cleaning, and new pipes

are necessary.

•

There is the possibility of rain water or air, including

moisture, entering the pipe.

•

4. When refrigerant cannot be recovered

•

There is the possibility that a large quantity of dirty oil

or moisture remains inside the pipes.

Placement location

Term

Curing manner

5. When a commercially available dryer is attached to the

existing pipes

1 month or more

Less than 1 month

Every time

Pinching

Outdoors

Indoors

•

There is the possibility that copper green rust has been

generated.

Pinching or taping

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Digital Inverter

YES

Are there scratches or dents on the existing pipes?

Existing pipes: Cannot be used.

• Use new pipes.

Is it possible to operate the existing air conditioner?

YES

• After the existing air conditioner is operated in cooling

mode for approx. 30 minutes or longer,* recover the

refrigerant.

• For cleaning the pipes and recovering oil

• Refrigerant recovery: Refrigerant recovery equipment

Nitrogen gas pressure 0.5 MPa

• Remove the existing air conditioner from the piping and

carry out flushing (nitrogen pressure 0.5 MPa) to remove

any remains inside of the pipe.

Note]

In case of twin pipes, also be sure to flush the

branching pipe.

(If there is discharge of remains, it is judged that a

large quantity of remains are present.)

Was largely discolored oil or a large quantity

of remains discharged? (When the oil

deteriorates, the color of the oil changes to a

muddy or black color.)

YES

Clean the pipes or use new pipes.

Connect the indoor/outdoor units to the existing pipe.

• Use a flare nut attached to the main unit for the

indoor/outdoor units. (Do not use the flare nut of the

existing pipe.)

• Re-machine the flare machining size to size for R410A.

Piping necessary to change the flare nut/

machining size due to pipe compression

When using a Ø19.1 mm pipe for the gas pipe of the first

branching pipe

1) Flare nut width: H

Copper pipe

(mm)

Ø12.7 Ø15.9 Ø19.1

ꢀ

Turn the existing pipe switch on the cycle control P.C.

board of the outdoor unit to ON side. At shipment from

factory OFF ꢀ ON for existing pipe (Refer to the table

below.) (Be sure to set the contents in the table below

in order to restrict the refrigerating cycle pressure of

the equipment in the pipe standard.)

outer

Ø6.4

Ø9.5

diameter

For R410A

For R22

Same as

above

Same as above

Existing pipe SW

Switch

2) Flare machining size: A

Copper pipe

(mm)

Bit 3 of SW802

ꢀ

Ø6.4

Ø9.5

Ø12.7 Ø15.9 Ø19.1

outer

diameter

9.1

9.0

13.2

13.0

16.6

16.2

19.7

19.4

24.0

23.3

For R410A

For R22

• (Airtight test), Vacuum dry, Refrigerant charge, Gas leak

check

Becomes a little larger for R410A

Do not apply refrigerator oil to the flare surface.

Trial run

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12. REPLACEMENT OFTHE SERVICE P.C. BOARD (4316V392) MCC-1599

1. Setting the jumper wires and DIP switches

Part name

J800 to J803 Model switching

J804 to J811 Settings

Function

Setting

Cut these jumper wires according to the following table.

Jumper wire

DIP switch

Set these jumper wires to the settings of the P.C. board

before replacement

Set SW802 to the setting of the P.C. board

before replacement

SW802

Settings

SW803

SW804

SW805

LED indication switching

Set SW803 to all OFF.

Special operations for service Set SW804 to all OFF

Special operations for service Set SW805 to all OFF

Model switching (J800 to J803)

Since this service P.C. board is available for several models, cut the jumper wires according to the following table.

If they are not cut correctly, an error code “L10” or “L29” appears on the remote controller and the operation of

the air conditioner is disabled.

Model name

Factory setting (default)

J 800 J 801 J 802 J 803

RAV-SM2244AT8✻-E

RAV-SM2804AT8✻-E

✻ : Characters that indicate the following

No. character : Standard models

: Connected,

: Cut

: For salt-affected areas

: For heavily salt-affected areas

MCC-1599

SW805

SW803

SW804

SW802

J804 to J806

J807 to J811

J800 to J803

– 110 –

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13. HOWTO EXCHANGE COMPRESSOR

13-1. Exchanging Procedure of Compressor (Outline)

START

Open PMV forcedly and then recover refrigerant

using a refrigerant recovery unit.

Has refrigerant recovery work been done?

YES

Turn off the leakage breaker.

Never recover the refrigerant to the outdoor unit.

For the refrigerant recovery work during reinstallation

of repair work, be sure to use the refrigerant recovery unit.

Remove the defective compressor.

Mount a service compressor.

Leakage check

Recovery of refrigerant to the outdoor unit is unavailable;

otherwise a serious accident such as explosion or

injury may be caused.

Vacuuming

Charge the refrigerant.

END

13-2. Exchange of Compressor

For exchange of compressors, refer to (11) Compressor in Section 14. Detachments.

– 111 –

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14. DETACHMENTS

14-1. Outdoor Unit

RAV-SM224, RAV-SM280 series

No. Part name

Procedure

Remarks

Common

procedure

WARNING

Service panel

Stop operation of the air conditioner and turn off

breaker switch.

CAUTION

Ensure wearing of gloves when performing any work

in order to avoid injury from parts, etc.

1. Detachment

1) Remove the service panel.

(Hexagonal screws Ø4 × 10, 3 pcs.)

• Remove the screws and then pull service panel

downward to remove.

2) Remove the power supply cable and the indoor/

outdoor connecting wire from the cord clamp and

the terminal.

3) Remove the top plate.

(Hexagonal screws Ø4 × 10, 6 pcs.)

2. Attachment

1) Attach the top plate.

Top plate

(Hexagonal screws Ø4 × 10, 6 pcs.)

2) Connect the power supply cable and the indoor/

outdoor connecting wire to the terminal and then

fix with the cord clamp.

CAUTION

The power supply cable and the indoor/outdoor

connecting wire must be affixed along the crossover

pipe using a commercially available bundling band so

that they do not make contact with the compressor,

gas valve, gas pipe and discharge pipe.

3) Attach the front panel.

(Hexagonal screws Ø4 ×10, 3 pcs.)

Discharge

port cabinet

(upper)

1. Detachment

Setting moment

1) Carry out the operation in 1. of

above.

Upper end plate

of heat exchanger

2) Remove screws for the discharge port cabinet and

the inverter assembly. (ST1T Ø4 × 8, 2 pcs.)

Discharge port

cabinet (upper)

3) Remove screws for the discharge port cabinet and

the discharge cabinet.

(Hexagonal screw Ø4 × 10, 2 pcs.)

4) Remove screw for the discharge cabinet and heat

exchanger. (ST1T Ø4 × 8, 1 pc.)

5) Remove screw for the discharge port cabinet and

the fin guard. (Hexagonal screw Ø4 × 10, 1 pc.)

2. Attachment

1) Place upper left side of discharge cabinet on

upper side of end board of heat exchanger and fix

with a screw. (ST1T Ø4 × 8, 1 pc.)

Discharge

port cabine

Heat exchanger

2) Mount other removed screws into original positions.

– 112 –

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No. Part name

Procedure

Remarks

Discharge

port cabinet

1. Detachment

Motor base

1) Carry out the operation in 1. of

above.

and 1. of

‚

Heat exchanger

Inverter assembly

2) Remove the screws fixing the inverter assembly,

the discharge port cabinet and the partition board.

(ST1T Ø4 × 8, 4 pcs.)

3) Remove the screws for the discharge port cabinet

and the bottom plate.

(Hexagonal screw Ø4 × 10, 2 pcs.)

4) Remove screw for the discharge port cabinet and

heat exchanger. (ST1T Ø4 × 8, 1 pc.)

5) Remove screw for the discharge port cabinet and

the motor base. (ST1T Ø4 × 8, 2 pcs.)

6) Remove screws for the discharge port cabinet

and the fin guard.

(Hexagonal screw Ø4 × 10, 2 pcs.)

2. Attachment

1) Place upper left side of discharge cabinet in cut

on upper side of end board of heat exchanger and

fix with a screw. (ST1T Ø4 × 8, 1 pc.)

Discharge

port cabinet

2) Mount other removed screws into original

positions.

Fin guard

Bottom plate

Cut in end plate

of heat exchanger

Discharge

port cabinet

– 113 –

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No. Part name

Side cabinet 1. Detachment

Procedure

Remarks

1) Carry out the operation in 1. of

above.

and 1. of

Side cabinet

C Type screw

(serration)

‚

2) Remove the screws fixing the inverter assembly

and the side cabinet. (ST1T Ø4 × 10, 3 pcs.)

3) Remove the screws for the side cabinet and the

valve fixing plate. (ST1T Ø4 × 10, 2 pcs.)

4) Remove screw for the side cabinet and piping

panel (rear). (Hexagonal screw Ø4 × 10, 1 pc.)

Holder fixing

plate

5) Remove screw for the side cabinet and the

bottom plate. (Hexagonal screw Ø4 × 10, 1 pc.)

6) Remove screws for the side cabinet, heat

exchanger and the fin guard.

(Hexagonal screw Ø4 × 10, 4 pcs.)

7) Remove the screw of the holder fixing plate and

the side cabinet (C type Ø4 × 8, 1 pc)

Fin grad

Heat

exchanger

2. Attachment

Piping panel

(rear)

Bottom plate

1) Temporarily suspend the side cabinet on the

inverter assembly using the hook.

2) Mount the removed screws in the opposite

procedure to that during detachment.

Inverter Ass’y

Hook

Valve fixing plate

– 114 –

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No. Part name

Procedure

Remarks

Inverter

assembly

1. Detachment

1) Carry out the operation in 1. of , 1. of

Remove the fan motor lead wire

from the cord clamp.

and

‚

1. of

above.

„

Fan-IPDU board

2) Remove the connectors connected to the fan motor

relay board and the Fan IPDU board, the connector

connected to other components from the control

board

Cut the

banding band

(Interface board).

CN600: TS sensor (3P: White, tube: Gray)

CN601: TE sensor (2P: White, tube: Blue)

CN602: TO sensor (2P: Orange, tube: Black)

CN603: TD sensor (3P: White, tube: Red)

CN604: TL sensor (2P: White, tube: White)

CN606: Presure sensor (4P: White)

CN609: Case thermo. (2P: Blue)

Discharge port

cabinet

Screws

Interface

board

Fan motor

relay board

CN690: High poressure switch (3P: Green)

CN700: 4-way coil (2P:Yellow)

Water-proof sheet (rubber sheet)

Sound-insulation board

(upper)

CN702: 2-way valve coil (3P: White)

CN710: PMV coil 1 (6P: White)

CN711: PMV coil 2 (6P: White)

• Fan IPDU board

CN750: Outdoors fan motor (3P: White)

Cut the banding band and remove connector

connected from fan motor to fan motor relay board.

• Fan motor relay board

CN08 : Outdoors fan motor (3P: White)

∗ Remove connectors after unlocking housing

section

Compressor lead

3) Remove the screw (1 position) fixing the discharge

port cabinet.

4) Cut bundling band fixing various lead lines to

inverter assembly.

5) Remove water-proof sheet (rubber sheet) and

sound-insulation plate (upper).

Case thermmostat

6) Remove terminal cover of compressor and remove

compressor lead.

Inverter assembly

7) Pull up the inverter assembly at upper side to

remove hook of partition plate (rear left part).

Hook

Hook sectio

2. Attachment

1) Mount the inverter assembly on the partition plate.

Partition plate

Inverter

assembly

CAUTION

When mounting the inverter assembly on the

partitioning plate, ensure proper mounting of the hook

(rear left part) with partitioning plate.

2) Mount the individual components in the opposite

procedure to that during detachment.

– 115 –

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No.

Part name

Procedure

Remarks

Interface board

(Control board)

1. Detachment

1) Carry out the operation in 1. of , 1. of

‚

MCC-1599

and 1. of

above.

„

2) Remove lead wires and connectors to other

components from the interface board

(control board).

CN603: TD sensor (3P: White, tube: Red)

CN602: TO sensor (2P: Orange, tube: Black)

CN601: TE sensor (2P: Green, tube: Blue)

CN600: TS sensor (3P: White, tube: Gray)

CN604: TL sensor (2P: White, tube: White)

CN700: 4-way coil (2P:Yellow)

CN710: PMV coil 1 (6P: White)

CN711: PMV coil 2 (6P: White)

CN702: 2-way coil (3P: White)

CN606: Pressure sensor (4P: White)

CN690: High pressure switch (3P: Green)

CN802: Connection with Fan IPDU board

(5P: white)

Interface board (Control board)

CN609: Case thermo.(2P :Blue)

CN708: Magnet switch (2P: Blue)

CN608: Connection with noise filter board

(2P: White)

CN01 : Indoor/Outdoor connection terminal

(5P: White)

CN02 : Power relay (3P: Red)

∗ Remove connectors after unlocking housing

section

3) Remove the claws of the supports

(4 positions) fixing the board and remove the

interface board (Control board).

Support (4 positions)

2. Attachment

1) Mount the interface board (Control board).

2) Mount the individual components in the

opposite procedure to that during detachment.

Statue of control board when removed

– 116 –

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No. Part name

Procedure

Remarks

Fan-IPDU

board

1. Detachment

1) Carry out the operation in 1. of , 1. of

FAN-IPDU board

and

‚

MCC-1597

1. of

above.

„

2) Remove lead wires and connectors to other

components from the Fan-IPDU board.

CN700: Relay connector (3P, Blue)

CN750: Outdoor fan motor (3P, White)

CN500: Connection between reactor and

noise filter board (7P, Red)

CN502: Compressor IPDU board (3P, White)

CN602: Noise filter board (2P, White)

CN504: Interface board (5P, Blue)

CN505: Compressor IPDU board (5P, Red)

∗ Connectors should be removed after unlocking

the housing section.

3) Remove screw fixing the earth wire.

4) Remove the claw of the support (3 positions) fixing

the board and the screw (5 positions) fixing the

heat sink and then remove the Fan-IPDU board.

Earth wire

2. Attachment

1) Mount Fan-IPDU board

2) Mount components in the opposite method to that

when removing.

Screw (5 positions)

Screw

Support (3 positions)

Heat sink

State of Fan-IPDU board when removed

– 117 –

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No. Part name

Procedure

Remarks

Noise filter

board

1. Detachment

1) Perform the operation in 1. of , 1. of , 1. of

Fan-IPDU board

„

‚

MCC-1600

1.-2 of

and 1.-2 of

†

‡

2) Remove the screws (4 positions) fixing the inverter

assembly (front) to remove the lead wires from the

upper left clamp. Then slide the inverter assembly

(front) upwardly and remove.

3) Remove the lead wires connector to other

components from the noise filter board.

CN05: Power supply terminal block (red)

CN06: Power supply terminal block (White)

CN07: Power supply terminal block (Black)

CN24: Power supply terminal block (White)

CN08: Power supply terminal block (Gray)

CN09: Connection to earth (Brown)

CN50: Interface board (2P, White)

CN51: Fan-IPDU board (2P, Back)

CN10: Posister (Red)

Screws

(2 positions)

Interface board

CN16: Relay (Red)

CN17: Compressor IPDU board (White)

CN18: Relay (Black)

CN19: Relay (Gray)

Remove

all lead wire

from the clamp

CN23: Fan-IPDU board (5P, Red)

∗ Connectors should be removed after unlocking

the housing section.

Screws

(2 positions)

Screws

(2 positions)

4) Remove the claw of the support (2 positions) and

the screw (2 positions) fixing the base and then

remove the noise filter base.

Inverter assembly

(front)

Noise filter board

2. Attachment

1) Mount noise filter board.

2) Mount components in the opposite method to that

when removing.

Support

(2 positions)

Support

(2 positions)

Temporary Suspended State

of Inverter Assembly (front)

Using the hook,

it is possible to temporarily suspend

the inverter assembly (front).

Using the hook

State of noise filter board when removed

– 118 –

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No. Part name

Compressor 1. Detachment

Procedure

Remarks

IPDU board

1) Carry out the operation in 1. of , 1. of

‚

MCC-1596

1. of , 1. of , 1. of

and 1. of

„

†

‡

2) Pull the compressor lead from the space in the

partition plate.

3) Remove the screw (1 position) fixing the dis-

charge port cabinet and the screws (4r positions)

fixing the inverter assembly (IPDU) and then

remove the lead wire from the top clamp.

4) Slide and remove the inverter assembly (IPDU),

rotate through 90 degrees and place the base

facing the front surface.

Inverterr asseembly

(front)

5) Remove the lead wire and connector to other

components from the compressor IPDU board.

CN01: Relay (Red)

CN02: Noise filter board (White)

CN03: Relay (Black)

Screw

CN04: Posister (Red)

Compressor lead

CN07: Power supply terminal block (Blue)

CN08: Power supply terminal block (Blue)

CN09: Power supply terminal block (Yellow)

CN10: Power supply terminal block (Yellow)

CN201: Compressor (Red)

Rotate 90˚

Inverter assembly

(IPDU)

Screw

CN202: Compressor (White)

CN203: Compressor (Black)

CN851: FAN-IPDU board (5P, Red)

CN101: FAN-IPDU board (3P, White)

∗ Connectors should be removed after unlocking

the housing section.

Discharge

port cabbinet

6) Remove the screws (4 positions) fixing the heat

sink and the screws (3 positions) fixing the

compressor IPDU board and then remove the

compressor IPDU board.

Screws

2. Attachment

1) Mount compressor IPDU board.

Compressor

IPDU board

2) Mount components in the opposite method to that

when removing.

Screws

Screw

Screws

Temporary suspended state

of Inverter Assembly (IPDU)

Screws

Heat sink

Using the hook,

it is possible to temporarily suspend

the inverter assembly (IPDU).

Using the hook

State of compressor IPDU board

when removed

– 119 –

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No. Part name

Fan motor

Procedure

Remarks

1. Detachment

1) Carry out the operation in 1. of

Flange nut

Turn too right

to loosen

, 1. of

and

‚

1. of

above.

2) Remove the flange nut fixing the fan motor and the

propeller fan.

• The flange nut is loosened by turning to the right.

(When tightening, turn it to the left)

3) Remove the propeller fan.

4) Remove the connector for the fan motor from the

inverter.

5) Remove the fan motor lead from the fan motor lead

fixing rubber member of the through section of the

partitioning board.

6) Remove the fixing screws (4 pieces) while support-

ing the fan motor so that it does not fall.

Propeller fan

2. Attachment

1) Mount the fan motor.

2) Mount the individual components in the opposite

procedure to that during detachment

∗ Points to note when assembling fan motor

• Tighten the flange nut with 4.9N•m (50kgf•cm).

• Adjust length of the fan motor lead at the fan

motor lead fixing rubber member so that the fan

motor lead is not slack in order to avoid contact

of the fan motor lead with the propeller fan.

Fan motor

Attach the motor lead fixing rubber member to

the partition board so that the projection is on

the refrigerating cycle side.

• Ensure that the heat exchanger does not come

into contact with the fan motor lead.

CAUTION

Ensure affixation of the fan motor lead to the motor

base using a metal band of the motor base and a

commercially available bundling band so that the fan

motor lead does not come to contact with the

propeller fan.

Fan motor lead fixing rubber (upper)

(mount so that the projection abuts with this side)

Fan motor lead fixing rubber (lower)

(mount so that the projection abuts with this side)

Motorr base

Metal

band fixing

Bundling

band fixing

Metal

band fixing

Bundling

band fixing

– 120 –

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No. Part name

Compressor 1. Detachment

Procedure

Remarks

Drip-proof sheet (rubber sheet)

1) Recover the refrigerant gas.

2) Carry out the operation in 1. of

and

above.

„

3) Remove the piping panel (front).

Remove the piping panel (front) and screws of the

bottom plate. (Hexagonal screw Ø4 × 10, 2 pcs.)

Remove screw of the piping panel (front) and the

piping panel (rear).

Sound-insulation

plate

(Hexagonal screw Ø4 × 10, 1 pc.)

4) Remove the piping panel (rear).

Remove the piping panel (rear) and screws of the

bottom plate. (Hexagonal screw Ø4 × 10, 2 pcs.)

5) Remove the drip-proof sheet. (Rubber sheet)

Piping panel (front)

Piping panel (rear)

6) Remove the sound-insulation plate

(upper, inner, outer).

7) Remove the terminal cover of the compressor and

then remove the compressor lead and the case

thermostat.

Case thermostat

CAUTION

• Ensure that the removed wiring terminals are

always insulated with insulation tape.

• The only wiring removed is the wiring for

performing exchange of the compressor.

Black

• The power lead connection section of the

compressor is a round terminal connection.

8) Remove the sensor pipe cover fixed to the

discharge pipe.

Power lead

While

Red

9) Using a burner, remove the discharge pipe and

the suction pipe connected to the compressor.

Remove (suction pipe)

Sensor pipe cover

WARNING

When removing the piping by broiling the welded part

with a burner, ensure that there is no oil in the pipe in

order to avoid the risk of fire with the melted wax.

Remove

(discharge pipe)

10) Disengage the discharge pipe and the suction

pipe of the refrigerating cycle upwardly.

11) Remove the compressor nuts which fix the

compressor to the bottom plate. (3 pcs.)

12) Pull out the compressor toward you.

Compressor bolt (3 pcs.)

CAUTION

As the weight of the compressor is 20kg or more, it

should be handled by 2 workers.

When there is no oil in the compressor, the mass of

the compressor is 22 kg.

– 121 –

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No. Part name

Compressor 2. Attachment

Procedure

Remarks

(continued)

1) Mount the compressor by reversing the procedure for removal.

CAUTION

The fixing torque for the hexagonal bolts fixing the compressor is 19.6N•m (200kgf•cm).

3. Vacuuming

1) Connect the vacuum pump to the charge port and the high-pressure check joint of the liquid

pipe and the gas pipe valve and then operate the vacuum pump.

2) Carry out vacuuming until the vacuum low pressure gauge indicates 1 (mmHg).

CAUTION

Before vacuuming, open the pulse motor valve fully. If the pulse motor valve is closed,

vacuuming may be impossible of the heat exchanger in the outdoor unit.

Forcible fully-opened method for the pulse motor valve

• Turn on the breaker switch.

• Short circuit CN300 on the interface board of the outdoor unit.

• Turn off the breaker switch.

4. Refrigerant charge

1) Add a refrigerant amount determined by the pipe length from the charge port of the valve.

CAUTION

The water-proof sheet (rubber sheet) should be mounted so that water drops from the

accumulator or the pipes do not come into contact with the terminal section of the compressor.

Pulse motor 1. Detachment

Accumulator

PMV unit

valve (PMV)

coil

1) Carry out work of item 1. of

and

above.

„

2) Rotate the coil while pulling upwardly and then

remove the coil from the pulse motor valve coil

main unit.

2. Attachment

1) Surely match the positioning projection of the coil

with the concave part of PMV main unit and then

fix it.

CAUTION

Mount the coils or the coil carefully so that they do

not make contact with the accumulator.

PMV coil

– 122 –

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No. Part name

Fan guard

Procedure

Remarks

1. Detachment

1) Carry out work of item 1. of

and 1. of

above.

Remover screw

(2 pcs.)

CAUTION

To prevent scratches to the product, carry out the

work on cardboard, cloth, etc.

2) Remove the discharge port cabinet and place the

fan guard side facing upwards.

Dischharge pport caabinet

3) Remove the fixing screws for the fan guard.

(Hexagonal screws Ø4 × 10, 2 pcs.)

4) Remove the discharge port cabinet and then put on

it so that the fan guard side faces downward.

5) Remove the screws fixing the bellmouth.

(ST1T Ø4 × 8, 2 pcs.)

Bellmouth

6) Remove bellmouth.

7) Press and remove hooking claw of fan guard with a

flat screwdriver.

Remove scrrew (2 pcs.)

Bellmouth

2. Attachment

1) Press the projection on the upper side of the fan

guard into the hole of the discharge cabinet and

then push in the hooking claws.

Fix the claws by using your hands to press the

hooking claws (5 positions).

Dischharge pport caabinet

CAUTION

Flat

screwdriver Fan guard

Check that all the hooking claws are fixed at the

specified positions.

2) After mounting, fix the fan guard with screws.

(Hexagonal screws Ø4 × 10, 2 pcs.)

3) Attach and mount the claws (3 positions) on the

upper side of the bellmouth in the square hole of

the discharge cabinet.

Hooking claw

4) After mounting, fix with a screw.

(ST1T Ø4 × 8, 2 pcs.)

Discharge port cabinet

Square hole

(3 positions)

Bellmouth

Claw (3 positions)

– 123 –

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15. EXPLODED VIEWS AND PARTS LIST

15-1. Outdoor Unit

RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E

25, 26, 27

44, 45

16, 17

22, 23, 24

13, 14

11, 12

58, 59

20, 21

36, 37

10, 49

9, 48

47, 55, 56

33, 34, 57

5, 52

– 124 –

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Model name

Location

No.

Part No.

Description

RAV-SM2244

RAV-SM2804

AT8-E AT8Z-E AT8ZG-E AT8-E AT8Z-E AT8ZG-E

43120224 Fan, Proprller, PE492

43122065 Bell Mouth

43191651 Guard, Fan

43100323 Guard, Fin

43050407 Thermostat, Bimetal

43151301 Switch, Pressure

4312C037 Motor, Fan, ICF-280-A100-1

4316V135 Bush

43146680 Valve, Packed, 12.7

43146725 Valve, Ball, SBV-JA6GTC-1

43146700 Valve, 2-way, VPV-603D

37546847 Coil, Solenoid, 2-way, AC220–240V

43146722 Coil, Solenoid, STF-01AJ502E1

43146698 Valve, 4-way, STF-0731G

43146734 Valve, Check, ZGV-S55B-A

43148208 Accumulator

43148209 Accumulator

43100345 Panel, Back, Piping

43111337 Rubber

43122095 Base Ass’y, Motor

43122105 Base Ass’y, Motor

4314G187 Condenser Ass’y, Lower

4314G188 Condenser Ass’y, Lower

4314G189 Condenser Ass’y, Lower

4314G191 Condenser Ass’y, Up

4314G192 Condenser Ass’y, Up

4314G193 Condenser Ass’y, Up

4301P703 Mark, TOSHIBA

4301P729 Mark, Inverter

43146676 Joint, Check

43119390 Hanger

43100347 Panel, Front, Piping

43149318 Rubber, Supporter, Pipe, DIA 19.0

43149320 Rubber, Supporter, Pipe, DIA 8.0

43111334 Insulator, Sound, Up

43111335 Insulator, Sound, In

43111336 Insulator, Sound, Out

43100329 Cabinet Ass’y, Out

43100332 Cabinet Ass’y, Up

43100335 Cabinet Ass’y, Front

43100338 Panel Ass’y, Side

43100341 Cabinet Ass’y, Top

Sensor Ass’y, Low Pressure,

43150321

NSK-BC010F-067

43197164 Nut, Flange

43047669 Nut, Flange

43196113 Bushing

43149324 Rubber, Cushion

43047692 Bonnet

43147451 Bonnet, 3/4 IN

43147649 Strainer

4314Q008 Strainer

43063317 Holder, Thermostat

43019904 Holder, Sensor

43197183 Bolt, Compressor, M6

43197184 Bolt, Compressor, M6

43149325 Band, Fix

43119477 Plate, Fix, Condenser

43119478 Plate, Fix, Condenser

43046494 Coil, PMV Ass’y, UKV-A040

4314Q004 Strainer

– 125 –

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15-2. Inverter Assembly

RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E

718, 719

714

702

705

704

720

717

718, 719

711

709

722

716

708

721

701

710

712

703

720

709

713

720

715

(TE)

(TS)

(TO)

(TD)

(TL)

706

707

– 126 –

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Model name RAV-SM

Location

No.

Part No.

Description

2244AT8-E

2804AT8-E

2244AT8Z-E

2804AT8Z-E

2244AT8ZG-E

2804AT8ZG-E

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

43058288 Reactor, CH-56-4Z

43154177 Relay, 480V, 20A (Contact)

43158199 Reactor, CH-44-FCZ-2

43158207 Reactor, CH-68

43153006 PTC-Thermistor, ZPROYCE101A500

43050425 Sensor Ass’y, Service, TC (F6)

43150319 Sensor Ass’y, Service, TD (F4)

43160565 Terminal Block, 3P, 20A, AC250V

43160579 Terminal, 4P, 30A

43060859 Fuse Block, 30A, 250V, FH153-PB

4316V390 P.C. Board Ass’y, MCC-1596, Comp-IPDU

4316V391 P.C. Board Ass’y, MCC-1597, Fan-IPDU

4316V392 P.C. Board Ass’y, MCC-1599, CDB

4316V398 P.C. Board Ass’y, MCC-1600, N/F

43063325 Holder, Sensor, 6-6.35, 8

4316V393 P.C. Board Ass’y, MCC-1436

43160590 Fuse, 6.3A, AC250V

43282001 Bushing

43183020 Collar

43063248 Supporter Ass’y

43060639 Fuse, 25A, 250V

43163015 Supporter

– 127 –

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15-3. Outdoor Unit

RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG)

25, 26, 27

44, 45

16, 17

22, 23, 24

13, 14

11, 12

58, 59

20, 21

36, 37

10, 49

9, 48

47, 55, 56

33, 34, 57

5, 52

– 128 –

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Model name

Location

No.

Part No.

Description

RAV-SM2244

RAV-SM2804

AT7

AT7Z

AT7ZG

AT7

AT7Z

AT7ZG

43120224 Fan, Proprller, PE492

43122065 Bell Mouth

43191651 Guard, Fan

43100323 Guard, Fin

43050407 Thermostat, Bimetal

43151301 Switch, Pressure

4312C037 Motor, Fan, ICF-280-A100-1

4316V135 Bush

43146680 Valve, Packed, 12.7

43146725 Valve, Ball, SBV-JA6GTC-1

43146700 Valve, 2-way, VPV-603D

43146716 Coil, Solenoid, 2-way, AC220V, 60Hz

43146706 Coil, Solenoid, VHV-01AJ502E1

43146698 Valve, 4-way, STF-0731G

43146734 Valve, Check, ZGV-S55B-A

43148208 Accumulator

43148209 Accumulator

43100345 Panel, Back, Piping

43111337 Rubber

43122095 Base Ass’y, Motor

43122105 Base Ass’y, Motor

4314G187 Condenser Ass’y, Lower

4314G188 Condenser Ass’y, Lower

4314G189 Condenser Ass’y, Lower

4314G191 Condenser Ass’y, Up

4314G192 Condenser Ass’y, Up

4314G193 Condenser Ass’y, Up

4301P703 Mark, TOSHIBA

4301P729 Mark, Inverter

43146676 Joint, Check

43119390 Hanger

43100347 Panel, Front, Piping

43149318 Rubber, Supporter, Pipe, DIA 19.0

43149320 Rubber, Supporter, Pipe, DIA 8.0

43111334 Insulator, Sound, Up

43111335 Insulator, Sound, In

43111336 Insulator, Sound, Out

43100329 Cabinet Ass’y, Out

43100332 Cabinet Ass’y, Up

43100335 Cabinet Ass’y, Front

43100338 Panel Ass’y, Side

43100341 Cabinet Ass’y. Top

Sensor Ass’y, Low Pressure,

43150321

NSK-BC010F-067

43197164 Nut, Flange

43047669 Nut, Flange

43196113 Bushing

43149324 Rubber, Cushion

43047692 Bonnet

43147451 Bonnet, 3/4 IN

43147649 Strainer

4314Q008 Strainer

43063317 Holder, Thermostat

43019904 Holder, Sensor

43197183 Bolt, Compressor, M6

43197184 Bolt, Compressor, M6

43149325 Band, Fix

43119477 Plate, Fix, Condenser

43119478 Plate, Fix, Condenser

43046494 Coil, PMV Ass’y, UKV-A040

4314Q004 Strainer

– 129 –

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15-4. Inverter Assembly

RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG)

718, 719

714

702

705

704

720

717

718, 719

711

709

722

716

708

721

701

710

703

712

720

709

713

720

715

(TE)

(TS)

(TO)

(TD)

(TL)

706

707

– 130 –

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Model name RAV-SM

Location

No.

Part No.

Description

2244AT7

2804AT7

2244AT7Z

2804AT7Z

2244AT7ZG

2804AT7ZG

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

43058288 Reactor, CH-56-4Z

43154177 Relay, 480V, 20A (Contact)

43158199 Reactor, CH-44-FCZ-2

43158207 Reactor, CH-68

43153006 PTC-Thermistor, ZPROYCE101A500

43050425 Sensor Ass’y, Service, TC (F6)

43150319 Sensor Ass’y, Service, TD (F4)

43160565 Terminal Block, 3P, 20A, AC250V

43160579 Terminal, 4P, 30A

43060859 Fuse Block, 30A, 250V, FH153-PB

4316V390 P.C. Board Ass’y, MCC-1596, Comp-IPDU

4316V391 P.C. Board Ass’y, MCC-1597, Fan-IPDU

4316V392 P.C. Board Ass’y, MCC-1599, CDB

4316V398 P.C. Board Ass’y, MCC-1600, N/F

43063325 Holder, Sensor, 6-6.35, 8

4316V393 P.C. Board Ass’y, MCC-1436

43160590 Fuse, 6.3A, AC250V

43282001 Bushing

43183020 Collar

43063248 Supporter Ass’y

43060639 Fuse, 25A, 250V

43163015 Supporter

– 131 –

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WARNINGS ON REFRIGERANT LEAKAGE

Important

Check of Concentration Limit

The room in which the air conditioner is to be

installed requires a design that in the event of

refrigerant gas leaking out, its concentration will

not exceed a set limit.

NOTE 2 :

The standards for minimum room volume are as follows.

1) No partition (shaded portion)

The refrigerant R410A which is used in the air

conditioner is safe, without the toxicity or combustibility of

ammonia, and is not restricted by laws to be imposed

which protect the ozone layer. However, since it contains

more than air, it poses the risk of suffocation if its

concentration should rise excessively. Suffocation from

leakage of R410A is almost non-existent. With the recent

increase in the number of high concentration buildings,

however, the installation of multi air conditioner systems

is on the increase because of the need for effective use

of floor space, individual control, energy conservation by

curtailing heat and carrying power etc.

Most importantly, the multi air conditioner system is able

to replenish a large amount of refrigerant compared with

conventional individual air conditioners. If a single unit of

the multi conditioner system is to be installed in a small

room, select a suitable model and installation procedure

so that if the refrigerant accidentally leaks out, its

concentration does not reach the limit (and in the event

of an emergency, measures can be made before injury

can occur).

2) When there is an effective opening with the adjacent

room for ventilation of leaking refrigerant gas (opening

without a door, or an opening 0.15% or larger than the

respective floor spaces at the top or bottom of the door).

Outdoor unit

Refrigerant piping

Indoor unit

3) If an indoor unit is installed in each partitioned room

and the refrigerant piping is interconnected, the

smallest room of course becomes the object.

In a room where the concentration may exceed the limit,

create an opening with adjacent rooms, or install

mechanical ventilation combined with a gas leak

detection device.

But when a mechanical ventilation is installed

interlocked with a gas leakage detector in the smallest

room where the density limit is exceeded, the volume

of the next smallest room becomes the object.

The concentration is as given below.

Total amount of refrigerant (kg)

Min. volume of the indoor unit installed room (m³)

≤ Concentration limit (kg/m³)

Refrigerant piping

Outdoor unit

The concentration limit of R410A which is used in multi

air conditioners is 0.3kg/m³.

Very

small

Indoor unit

room

Small

room

Medium

room

Large room

Mechanical ventilation device - Gas leak detector

NOTE 1 :

If there are 2 or more refrigerating systems in a single

refrigerating device, the amounts of refrigerant should be

as charged in each independent device.

NOTE 3 :

The minimum indoor floor area compared with the

amount of refrigerant is roughly as follows:

(When the ceiling is 2.7m high)

Outdoor unit

e.g., charged

e.g.,

amount (10kg)

charged amount (15kg)

Range below the

m²

density limit

of 0.3 kg/m³

(countermeasures

not needed)

Room A Room B Room C Room D Room E Room F

Indoor unit

Range above

the density limit

of 0.3 kg/m³

(countermeasures

needed)

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in

rooms A, B and C is 10kg.

The possible amount of leaked refrigerant gas in

rooms D, E and F is 15kg.

Total amount of refrigerant

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TOSHIBA CARRIER CORPORATION

23-17, TAKANAWA 3 CHOME, MINATOKU, TOKYO, 108-8580, JAPAN

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