Mitsubishi PUHZ-RP3VHA1, PUHZ-RP2.5VHA, PUHZ-RP4VHA, PUHZ-RP2VHA, PUHZ-RP4VHA1 Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R410A

Outdoor unit [model names]

PUHZ-RP1.6VHA

[Service Ref.]

PUHZ-RP1.6VHA

2004

No.OC294

REVISED-EDITION-C

Revision:

• PUHZ-RP2.5VHA1, PUHZ-RP3VHA1 are added in REVISED EDITION-C.

PUHZ-RP2VHA PUHZ-RP2.5VHA

PUHZ-RP3VHA

PUHZ-RP4VHA

PUHZ-RP5VHA

PUHZ-RP6VHA

PUHZ-RP2VHA PUHZ-RP2.5VHA PUHZ-RP2.5VHA PUHZ-RP3VHA PUHZ-RP3VHA

PUHZ-RP4VHA PUHZ-RP4VHA

PUHZ-RP5VHA PUHZ-RP5VHA

PUHZ-RP6VHA PUHZ-RP6VHA

CONTENTS

10.

11. TROUBLESHOOTING···································25

12. DISASSEMBLY PROCEDURE ·····················71

13. PARTS LIST··················································91

Model name indication

14. OPTIONAL PARTS························Back Cover

1. TECHNICAL CHANGES ·································2

2. SAFETY PRECAUTION··································3

COMBINATION OF INDOOR AND OUTDOOR UNITS

4. PART NAMES AND FUNCTIONS··················7

5. SPECIFICATIONS···········································8

6. DATA ·····························································11

7. OUTLINES AND DIMENSIONS····················13

8. WIRING DIAGRAM·······································16

9. CONNECTING CABLE·································18 REFRIGERANT SYSTEM DIAGRAM

• Please void OC294 REVISED EDITION-B.

···7

··············19

PUHZ-RP2.5VHA PUHZ-RP3VHA

1 TECHNICAL CHANGES

PUHZ-RP4VHA ➞ PUHZ-RP4VHA1

PUHZ-RP5VHA ➞ PUHZ-RP5VHA1 PUHZ-RP6VHA ➞ PUHZ-RP6VHA1

1. Reduced Design Pressure: Design Pressure has been changed from 4.41MPa to 4.15MPa. (High Pressure Switch has been changed.)

2. Partial Change on Refrigerant Circuit: Only 1 distributor is adopted on the Heat Exchanger. (Previously 2)

3. Partial Change on Electrical Wiring: Change of reactor (DCL). Only 1 reactor (DCL) is adopted. (Previously 2)

4. New Service Parts as a result of the structural improvement:

• Power Receiver

• Separator

• Rubber Mount (for a Compressor)

• Thermistor (2 phase pipe, Outdoor temperature)

• Thermistor (Discharge)

• Linear Expansion Valve Coil

5. Reduced Refrigerant Amount The Charged Refrigerant Amount has been reduced from 5.5kg to 5.0kg

6. Wider Operation Range:

A change is made on the Minimum Capacity. (For details, please refer to the Service Manual for indoor units.)

PUHZ-RP2.5VHA ➞ PUHZ-RP2.5VHA1 PUHZ-RP3VHA ➞ PUHZ-RP3VHA1

1. The parts below have been changed.

• Thermistor (Outdoor pipe / TH3)

• Linear expansion valve coil

2. The refrigerant circuit has been changed.

• High pressure switch (4.41MPa

• Charge plug

➞ 4.14MPa)

2 SAFETY PRECAUTION

Use new refrigerant pipes.

Make sure that the inside and outside of refrigerant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness.

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.

In case of using the existing pipes for R22, be careful with the followings.

· For RP4, 5 and 6, be sure to perform replacement opera tion before test run.

· Change flare nut to the one provided with this product. Use a newly flared pipe.

· Avoid using thin pipes.

Charge refrigerant from liquid phase of gas cylinder.

If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check valve.

Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Keep the tools with care.

If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.

If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

If large amount of mineral oil enter, that can cause deterioration of refrigerant oil etc.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

2-1. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

[1] Cautions for service

(1) Perform service after collecting the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Unit

Gravimeter

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

3 Electronic scale 4 Gas leak detector ·Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check ·Attach on vacuum pump. 6 Refrigerant charge base 7 Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)

8 Refrigerant recovery equipment

specifications

Cylinder with syphon

. (UNF1/2)

2-2. Changed point

Connecting a new air conditioner

1Flaring work should be done so that flare meets the dimension for R410A. Use flare nut provided with indoor and outdoor unit.

2When using gas piping of [19.05mm for RP4, 5 or 6. Make sure that DIP SW8-1 on outdoor unit controller board is set to ON. WThis is to keep the pressure on pipes within permissible range.

●Use different diameter joint or adjust the piping size by brazing. 3When using pipes larger than specified size for RP1.6, 2, 2.5 or 3.

Make sure that DIP SW8-1 on outdoor unit controller board is set to ON. W

This is to prevent oil flow ratio from lowering due to the decrease in flowing refrigerant.

●Use different diameter joint or adjust the piping size by brazing. 4When existing pipes are specified size.

The pipes can be reused referring to table 1 on page 18.

●Use different diameter joint or adjust the piping size by brazing. ★When using existing pipes for RP4, 5 and 6.

Make sure that DIP SW8-2 on outdoor unit controller board is set to ON and perform replacement operation. wChemical compounds containing chlorine left in existing pipes are collected by rep lace filter.

●The air conditioner automatically performs cooling operation through replace filter for about 2 hours.

Measure the existing pipe thickness and check for damage.

Check if existing air conditioner can operate.

Existing air conditioner can operate.

Disconnect existing air conditioner from piping.

Existing pipes can be reused.

In case the unit is RP1.6, 2,

2.5 ro 3 which utilizes AB oil.

In case the unit is RP4, 5 or 6 which utilize ester oil.

Perform cooling operation for about 30 minutes and then do a pump down work.

Use a refrigerant recovery equipment to collect the refrigerant.

Check the oil condition when collecting the refrigerant.

Disconnect existing air conditioner from pipes and clean pipes using cleaning device.

Existing air conditioner cannot operate.

The existing pipe thickness meets specifications and the pipes are not damaged.

The existing pipe thickness does not meet specifications or the pipes are damaged.

Oil is clean.

Connect a new air conditioner. Connect a new air conditioner.

Perform replacement operation.

Oil is dirty.

Attach a filter drier.

When the compressor bearings are glazed, rotation scratches are present, or the compressor breaks down, iron particles or oil deterioration will blacken the oil.

·When performing replacement operation, make sure that DIP SW8-2 on outdoor unit controller board is set to ON. wChemical compounds containing chlorine left in existing pipes are collected by replace filter.

●The air conditioner automatically performs cooling operation through replace filter for about 2 hours.

Existing pipes cannot be reused. Use new pipes.

• Precautions when reusing existing R22 refrigerant pipes (1) Flowchart

(2) Cautions for refrigerant piping work

1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

0.8

1.0

—

0.8

1.0

Nominal

dimensions

Diagram below: Piping diameter and thickness

Outside

diameter

(mm)

Thickness

(mm)

R410A R22 1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

9.1

13.2

16.6

19.7

—

9.0

13.0

16.2

19.4

23.3

Nominal

dimensions

Flare cutting dimensions

Outside

diameter

Dimension A

( )

-0.4

(mm)

R410A R22 1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

17.0

22.0

26.0

29.0

—

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions

Flare nut dimensions

Outside

diameter

Dimension B

(mm)

R410A

w36.0mm for

indoor unit of RP4, 5 and 6

R22

Gauge manifold Charge hose Gas leak detector

Refrigerant recovery equipment Refrigerant cylinder Applied oil

Safety charger

Charge valve Vacuum pump

Flare tool

Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale

Vacuum gauge or thermistor vacuum gauge and vacuum valve Charging cylinder

Air purge and refrigerant charge Operation check and the two above Gas leak check Collection of refrigerant Refrigerant charge Apply to flared section

Prevent compressor malfunction when charging refrigerant by

spraying liquid refrigerant Prevent gas from blowing out

when detaching charge hose Vacuum drying and air purge

Flaring work of piping

Bend the pipes Cut the pipes Weld the pipes Charge refrigerant Check the degree of vacuum. (Vacuum

valve prevents back flow of oil and refrigerant to thermistor vacuum gauge) Charge refrigerant

Tool exclusive for R410A Tool exclusive for R410A Tool for HFC refrigerant Tool exclusive for R410A Tool exclusive for R410A Ester oil and alkylbenzene oil (minimum amount) Tool exclusive for R410A

Tool exclusive for R410A Tools for other refrigerants can

be used if equipped with adopter for reverse flow check Tools for other refrigerants

can be used by adjusting flaring dimension Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used

Tool exclusive for R410A

Tools and materials Use R410A tools Can R22 tools be used?

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Can R407C tools be used?

Ester oil: Alkylbenzene oil: minimum amount

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting

flaring dimension)

: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.) : Tools for other refrigerants can be used under certain conditions. : Tools for other refrigerants can be used.

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410Ais same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

1Thickness of pipes

Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7mm or below.)

2Dimensions of flare cutting and flare nut

The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because of its working pressure higher than that of other refrigerants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also have partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2” and 5/8”, the dimension B changes.

Use torque wrench corresponding to each dimension.

Dimension A

3Tools for R410A (The following table shows whether conventional tools can be used or not.)

Dimension B

3 COMBINATION OF INDOOR AND OUTDOOR UNITS

Heat pump type

Outdoor unit

PUHZ-RP

PEAD-RP·EA.UK PEAD-RP·EA1.UK

PLA-RP·AA.UK PLA-RP·AA1.UK

PEAD-RP·GA.UK PLA-RP·AA

PLA-RP·AA1

—

OC293 REVISED EDITION-B

OC297 REVISED EDITION-B

PKA-RP·GAL

OC301 REVISED EDITION-A

PKA-RP·FAL

OC305

PCA-RP·GA

OC311

Indoor unit

Service

Manual No.

Service Ref.

Heat pump

without

electric heater

VHA

2 2.5

VHA VHA VHA

VHA

1.6

——

—

————

———

4 PART NAMES AND FUNCTIONS

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m(PUHZ-RP1.6~RP6))

PUHZ-RP1.6VHA PUHZ-RP2VHA

PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

PUHZ-RP4VHA PUHZ-RP4VHA1 PUHZ-RP5VHA PUHZ-RP5VHA1

The refrigerant circuit with LEV(Linear Expansion Valve) and power receiver always control the optimal refrigerant level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes problems. Heretofore it is completely eliminated. This unique system improves the quality and reliability of the work done.It also helps to speed up the installation time.

PUHZ-RP6VHA PUHZ-RP6VHA1

5 SPECIFICATIONS

Service Ref.

Function

Power supply (phase, cycle, voltage) External finish

Refrigerant control Compressor

Crankcase heater Heat exchanger Fan Fan(drive) o No.

OUTDOOR UNIT

Defrost method Noise level

Dimensions

Weight Refrigerant

Pipe size O.D. Connection method Between the indoor &

outdoor unit

REFRIGERANT PIPING

Running current

Model Motor output Starter type Protection devices

Fan motor output Airflow

Charge Oil (Model)

/min(CFM

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

mm(in.) mm(in.) mm(in.)

kg(lbs) kg(lbs)

mm(in.) mm(in.)

dB dB

PUHZ-RP1.6VHA PUHZ-RP2VHA

Cooling

4.01

HP switch

Discharge thermo

)

Heating Single, 50Hz, 220-230-240V

4.23 Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

SNB130FLBH

0.8 Line start

Plate fin coil

Propeller fan o 1

0.043

35(1,240)

Reverse cycle

800(31-1/2)

330+23(11-13/16+7/8)

600(23-5/8)

45(99)

R410A

2.5(5.5)

0.45(NEO22)

6.35(1/4)

12.7(1/2)

Flared

Flared Max. 30m Max. 50m

—

44 46

Cooling

6.16

Discharge thermo

Heating

6.47

1.1

HP switch

Notes1.Rating Conditions (ISO T1)

Cooling :Indoor : D.B. 27˚C(80˚F), W.B. 19˚C(66˚F) Outdoor : D.B. 35˚C(95˚F), W.B. 24˚C(75˚F) Heating :Indoor : D.B. 20˚C(68˚F) Outdoor : D.B. 7˚C(45˚F), W.B. 6˚C(43˚F) Refrigerant piping length (one way) : 5m (16ft)

2. Guaranteed operating range Indoor

Cooling

Heating

3. Guaranteed voltage 198~264V, 50Hz

4. Above data based on indicated voltage

5. Refer to the service manual of indoor unit for tha indoor unit's specifications.

Upper limit Lower limit Upper limit Lower limit

Indoor Unit 1 phase 230V 50Hz Outdoor Unit 1 phase 230V 50Hz

D.B. 35˚C, W.B. 22.5˚C

D.B. 19˚C, W.B. 15˚C

D.B. 28˚C D.B. 17˚C

Outdoor

D.B. 46˚C

D.B. -5˚C D.B. 21˚C, W.B. 15˚C D.B. -11˚C, W.B. -12˚C

Service Ref.

Function

Power supply (phase, cycle, voltage) External finish

Refrigerant control Compressor

Crankcase heater Heat exchanger Fan Fan(drive) o No.

OUTDOOR UNIT

Defrost method Noise level

Dimensions

Weight Refrigerant

Pipe size O.D. Connection method Between the indoor &

outdoor unit

REFRIGERANT PIPING

Running current

Model Motor output Starter type Protection devices

Fan motor output Airflow

Charge Oil (Model)

/min(CFM

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

mm(in.) mm(in.) mm(in.)

kg(lbs)

mm(in.) mm(in.)

dB dB

PUHZ-RP2.5VHA PUHZ-RP2.5VHA1

Cooling

6.61

)

Heating

7.50

Single, 50Hz, 220-230-240V

Linear Expansion Valve

TNB220FMBH

HP switch

Discharge thermo

Propeller fan o 1

0.060

55(1,940)

47 48

943(37-1/8)

75(165)

3.5(7.7)

0.87(NEO22)

Max. 50m

PUHZ-RP3VHA PUHZ-RP3VHA1

Cooling

8.04

Munsell 3Y 7.8/1.1

Plate fin coil

Reverse cycle

950(37-3/8)

330+30(13+1-3/16)

Heating

9.74

Hermetic

1.61.4

Line start

—

R410A

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m

PUHZ-RP4VHA PUHZ-RP4VHA

Cooling

12.33

ANV33FDAMT

1.9

HP switch LP switch

Discharge thermo

Propeller fan o 2

0.060+0.060 100(3,530)

49 51

1,350(53-1/8)

121(267)

5.5(12.1)·····RP4VHA

5.0(11.0)·····RP4VHA

1.40(MEL56)

Max. 75m

Heating

13.94

Notes1.Rating Conditions (ISO T1)

2. Guaranteed operating range Indoor

Cooling

Heating

3. Guaranteed voltage

198~264V, 50Hz

4. Above data based on indicated voltage

5. Refer to the service manual of indoor unit for tha indoor unit's specifications.

Upper limit Lower limit Upper limit Lower limit

Indoor Unit 1 phase 230V 50Hz Outdoor Unit 1 phase 230V 50Hz

D.B. 35˚C, W.B. 22.5˚C

D.B. 19˚C, W.B. 15˚C

D.B. 28˚C D.B. 17˚C

Outdoor

D.B. 46˚C

D.B. -5˚C D.B. 21˚C, W.B. 15˚C D.B. -11˚C, W.B. -12˚C

Service Ref.

Function

Power supply (phase, cycle, voltage) External finish

Refrigerant control Compressor

Crankcase heater Heat exchanger Fan Fan(drive) o No.

Defrost method

OUTDOOR UNIT

Noise level Dimensions

Weight Refrigerant

Pipe size O.D. Connection method Between the indoor &

outdoor unit

REFRIGERANT PIPING

Running current

Model Motor output Starter type Protection devices

Fan motor output Airflow

Charge Oil (Model)

/min(CFM

Cooling Heating

W D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

mm(in.) mm(in.) mm(in.)

kg(lbs)

mm(in.) mm(in.)

dB dB

PUHZ-RP5VHA PUHZ-RP5VHA1

Cooling

15.80

)

Heating

Single, 50Hz, 220-230-240V

17.50 Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

ANV33FDAMT

2.4 Line start

HP switch, LP switch, Discharge thermo

—

Plate fin coil

Propeller fan o 2

0.060 +0.060 100(3,530)

Reverse cycle

50 52

950(37-3/8)

330+30(13+1-3/16)

1,350(53-1/8)

121(267)

R410A

5.5(12.1)·····RP5, 6VHA

5.0(11.0)·····RP5, 6VHA1

1.40(MEL56)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 75m

PUHZ-RP6VHA PUHZ-RP6VHA1

Cooling

20.73

Heating

20.37

2.9

Notes1.Rating Conditions (ISO T1)

2. Guaranteed operating range Indoor

Cooling

Heating

3. Guaranteed voltage 198~264V, 50Hz

4. Above data based on indicated voltage

5. Refer to the service manual of indoor unit for tha indoor unit's specifications.

Upper limit Lower limit Upper limit Lower limit

Indoor Unit 1 phase 230V 50Hz Outdoor Unit 1 phase 230V 50Hz

D.B. 35˚C, W.B. 22.5˚C D.B. 19˚C, W.B. 15˚C

D.B. 28˚C D.B. 17˚C

Outdoor D.B. 46˚C D.B. -5˚C

D.B. 21˚C, W.B. 15˚C

D.B. -11˚C, W.B. -12˚C

6 DATA

Piping length (one way)

10m

20m

30m

40m

50m

Factory charged

2.1

3.1

5.1

4.6

2.3

3.3

5.3

4.8

2.5

3.5

5.5

5.0

2.7

4.1

6.1

5.6

2.9

4.7

6.7

6.2

60m

— — — —

7.3

6.8

75m

— — — —

7.9

7.4

2.5

3.5

5.5

5.0

Service Ref.

PUHZ-RP4VHA PUHZ-RP5VHA

PUHZ-RP1.6VHA PUHZ-RP2VHA

PUHZ-RP2.5VHA PUHZ-RP2.5VHA

PUHZ-RP3VHA PUHZ-RP3VHA

PUHZ-RP6VHA PUHZ-RP4VHA

PUHZ-RP5VHA1 PUHZ-RP6VHA1

U-V U-W W-V

Unit

Compressor model

Winding

Resistance

( " )

ANV33FDAMT

(at 20°C)

0.266

SNB130FLBH

0.300 ~ 0.340

PUHZ-RP4,5,6VHA

PUHZ-RP1.6,2VHA

TNB220FMBH

0.865 ~ 0.895

PUHZ-RP2.5,3VHA

6-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

6-2. COMPRESSOR TECHNICAL DATA

Longer pipe than 30m, additional charge is required.

6-3. NOISE CRITERION CURVES

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-RP4VHA PUHZ-RP4VHA

COOLING

MODE

HEATING

SPL(dB)

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-RP5VHA PUHZ-RP5VHA

PUHZ-RP6VHA PUHZ-RP6VHA

COOLING

MODE

HEATING

SPL(dB)

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

PUHZ-RP1.6VHA PUHZ-RP2VHA

COOLING

MODE

HEATING

SPL(dB)

LINE

MICROPHONE

1.5m

UNIT

GROUND

PUHZ-RP2.5VHA PUHZ-RP2.5VHA PUHZ-RP3VHA PUHZ-RP3VHA

SPL(dB)

MODE

COOLING

HEATING

LINE 47 48

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

7 OUTLINES AND DIMENSIONS

Service panel for charge plug

w 1 In the place where short cycle tends to occur, cooling and heating capacity and power consumption might get lowered 10%. Air outlet guide (optional PAC-SG58SG) will help them improve.

w 2 If air discharges to the wall, the surface might get stained.

Minimum installation space for outdoor unit

100 mm or more as long as no obstacle is placed on the rear and light-and-left sides of the unit.

2 sides should be open in the right, left and rear side.

w 2

w 1

100 mm or more

500 mm or more

Basically open

100 mm or more

Free space around the outdoor unit (basic example)

350 mm or more

w 1

Air intake

Air discharge

Air intake

Connection for gas pipe

Service port

Connection for liquid pipe

Service panel

4-10 o 21 oval hole (M10 foundation bolt)

[33 drain hole

43.6

152

155

400

347.5

45.4

365

330

300

Handle for moving

600

300

150

287.5 Installation bolt pitch: 500

800

183

155

32.5

1. FOUNDATION BOLTS

2. PIPING-WIRING DIRECTION

Piping and wiring connection can be made from the rear direction only.

3. ATTACHING THE CONDUIT

In order to attach the conduit, it is necessary to fix the metal plate with 2 screws to the back panel. Procure the metal plate and make screw holes locally. It is recommended to use the metal plate shown below. Align the metal plate to the marks on the unit and attach it.

Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts, washer and nut must be purchased locally.)

18 or below

w Conduit hole

w The position and the size of

conduit hole depend on the conduit to be used.

Holes for metal plate fixing screw w The size of hole depends on the screw to be used.

FOUNDATION

PUHZ-RP1.6VHA PUHZ-RP2VHA

Unit : mm

PUHZ-RP2.5VHA

Over 10mm

FRE

Over 500mm

Over 100mm

Over 10mm

PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

Unit : mm

PUHZ-RP4VHA

Over 10mm

FRE

Over 1000mm

Over 150mm

Over 10mm

PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP5VHA PUHZ-RP6VHA PUHZ-RP6VHA

Unit : mm

8 WIRING DIAGRAM

MODELS

SW6

W1 MODEL SELECT

1.6V

MODELS

SW6

2.5V

OFF

23456

OFF

23456

OFF

23456

OFF

23456

PUHZ-RP1.6VHA PUHZ-RP2VHA PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

W2 Only PUHZ-RP2.5, 3VHA.

PUHZ-RP4VHA

MODELS

SW6

W1 MODEL SELECT

OFF

23456

OFF

23456

OFF

23456

PUHZ-RP4VHA1 PUHZ-RP5VHA PUHZ-RP5VHA1 PUHZ-RP6VHA PUHZ-RP6VHA1

Only PUHZ-RP4VHA1

PUHZ-RP5VHA1 PUHZ-RP6VHA1

9 CONNECTING CABLE

For 220-240V 50Hz

The cable shall not be lighter than design 245 IEC or 227 IEC. The cable length may vary depending on the condition of installation, humidity or materials, etc.

Cross section

of cable

Wire size

)

(mm

Number

of wires

Polarity L(m)

Round

2.5

Clockwise : S1-S2-S3

Flat

2.5

Not applicable (Because center wire has no cover finish)

Flat

1.5

From left to right : S1-Open-S2-S3

Round

2.5

Clockwise : S1-S2-S3-Open Connect S1 and S3 to the opposite angle

✽1 : In case that cable with stripe of yellow and green is available. ✽2 : In the flat cables are connected as this picture, they can be used up to 80m.

(50)

✽1

Not

applicable

✽2

(45)

✽3

✽4

(3C Flat cable ✕ 2)

S1 S2 S3

✽3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm ✽4 : In case of regular polarity connection (S1-S2-S3).

10 REFRIGERANT SYSTEM DIAGRAM

Distributor

Thermistor TH7 (Outdoor)

Heat exchanger

Refrigerant GAS pipe connection(5/8F)

Refrigerant LIQUID pipe connection(3/8F)

Stop valve (with service port)

Strainer #100

Power receiver

Linear expansion valve B

Linear expansion valve A

Strainer #100

Thermistor TH6 (Outdoor 2-phase pipe)

Thermistor TH3 (Outdoor pipe)

Charge plug (Low pressure)

Charge plug (High pressure)

High pressure switch 63H

Bypass valve

Oil separator

Thermistor TH4 (Discharge)

Muffler

Strainer #50

4-way valve

Compressor

Ball valve

Capillary tube O.D.4.0OI.D.2.4OL500

Capillary tube O.D.2.5OI.D.0.6OL1000

Thermistor TH7 (Outdoor)

Heat exchanger

Refrigerant GAS pipe connection(1/2F)

Refrigerant LIQUID pipe connection(1/4F)

Stop valve

Strainer #100

Power receiver

Linear expansion valve B

Thermistor TH6 (Outdoor 2-phase pipe)

Thermistor TH3 (Outdoor pipe)

Charge plug

High pressure switch 63H

Thermistor TH4 (Discharge)

Compressor

Strainer #50

Solenoid valve (Four-way valve)

Muffler

Distributor

Linear expansion valve A

Strainer #100

Muffler

Stop valve (with service port)

PUHZ-RP1.6VHA PUHZ-RP2VHA

PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

PUHZ-RP4VHA

Distributor

Thermistor TH7 (Outdoor)

Heat exchanger

Refrigerant GAS pipe connection(5/8F)

Refrigerant LIQUID pipe connection(3/8F)

Stop valve (with service port)

Strainer #100

Power receiver

Linear expansion valve B

Linear expansion valve A

Strainer #100

Thermistor TH6 (Outdoor 2-phase pipe)

Thermistor TH3 (Outdoor pipe)

Charge plug (Low pressure)

Charge plug (High pressure)

High pressure switch 63H

Replace filter

Thermistor TH4 (Discharge)

Compressor

Strainer #50

Solenoid valve (Four-way valve)

Capillary tube (O.D.4.0OI.D.3.0OL200)O2pcs

Strainer #100

Low pressure switch 63L

Muffler

Ball valve

Restrictor valve

Solenoid valve (Bypass valve)

Distributor

Thermistor TH7 (Outdoor)

Heat exchanger

Refrigerant GAS pipe connection(5/8F)

Refrigerant LIQUID pipe connection(3/8F)

Stop valve (with service port)

Strainer #100

Power receiver

Linear expansion valve B

Linear expansion valve A

Strainer #100

Thermistor TH6 (Outdoor 2-phase pipe)

Thermistor TH3 (Outdoor pipe)

Charge plug (Low pressure)

Charge plug (High pressure)

High pressure switch 63H

Replace filter

Thermistor TH4 (Discharge)

Compressor

Strainer #50

Solenoid valve (Four-way valve)

Strainer #100

Low pressure switch 63L

Muffler

Ball valve

Restrictor valve

Solenoid valve (Bypass valve)

PUHZ-RP5VHA PUHZ-RP6VHA

PUHZ-RP4VHA1 PUHZ-RP5VHA1 PUHZ-RP6VHA1

Applicable extension pipe for each model

30m or

above

31 — 40m

0.2kg

0.6Kg

0.6kg

10m or below

41 — 50m

0.4kg

1.2Kg

1.2kg

51 — 60m

— —

1.8kg

61 — 75m

— —

2.4kg

<Table 2> Additional refrigerant charging amount for pipe of standard diameter

Outdoor unit

Permitted

pipe length

Additional refrigerant charging amount for pipe

length exceeding 30 m (kg)

PUHZ-RP1.6, 2VHA PUHZ-RP2.5, 3VHA, 2.5, 3VHA

PUHZ-RP4-6VHA, RP4-6VHA

Outdoor unit

Number of

bends

Height

difference

50m or less 50m or less

75m or less

Permitted

pipe length

50m or less

75m or less

2.1

3.1

5.1

4.6

11 — 20m 21 — 30m

2.3

3.3

5.3

4.8

2.5

3.5

5.5

5.0

31 — 40m

2.7

(0.2)

4.1

(0.6)

6.1

(0.6)

5.6

(0.6)

2.9

(0.4)

4.7

(1.2)

6.7

(1.2)

6.2

(1.2)

— — — —

7.3

(1.8)

6.8

(1.8)

— — — —

7.9

(2.4)

7.4

(2.4)

41 — 50m 51 — 60m 61 — 75m

Recharge refrigerant amount or additional amount in parentheses

PUHZ-RP1.6, 2VHA

PUHZ-RP2.5, 3VHA PUHZ-RP2.5, 3VHA

PUHZ-RP4-6VHA

Liquid

pipe

(mm)

Gas pipe

(mm)

[6.35

[9.52 [12.7

[9.52

Thick-

ness

Thick-

ness

RP1.6 RP2 RP2.5 RP3 RP4 RP5 RP6

t0.8

[12.7

t0.8

[15.88

t1.0

[12.7

t0.8

[15.88

t1.0

[19.05

t1.0

[15.88

t1.0

[19.05

t1.0

t0.8

: Standard piping : It can be used, however, additional refrigerant charge is required when the pipe length exceeds 20m. Refer to <table 4>. : It cannot be used. : It can be used. : It can be used, however, the capacity is lowered. Refer to (c) Capacity correction.

<Table 1> Pipe length for 1:1 system

*1: Set DIP SW8-1 on outdoor unit controller board to ON. *2: The maximum length is 50 m in case of using existing pipes.

[Marks in the table above]

50m

t0.8

30m 30m

10m 30m 30m

50m

30m

50m 50m

10m

50m

(*1)

75m

(*2)

50m

10m 30m 30m10m 50m

75m

(*2)

75m

(*2)

50m

(*1)

30m

(*1)

50m

(*1)

50m

(*1)

50m

(*1)

50m

(*1)

50m10m 30m 30m 30m

(*1)

Required additional charge when the pipe size is larger than the standard diameter

[9.52 [12.7 [12.7

RP1.6, 2 RP2.5, 3 RP4-6

Liquid pipe dia

Chargeless

30m 30m 50m

60 g per 1 m longer than 20 m 100 g per 1 m longer than 20 m 100 g per 1 m longer than 20 m

20m 20m 20m

Max. pipe length

Refrigerant amount to be added

The height difference between indoor and outdoor unit should be kept within 30 m for all models. (1) 1:1 system (a) Maximum pipe length

(b) Adjusting the amount of refrigerant

• Additional refrigerant charge is not necessary for the pipe length up to 30 m. When the pipe length exceeds 30 m or service

(refrigerant replacement) is performed, charge proper amount of refrigerant for each pipe length referring to table below. Use refrigerant R410A. Use charge hose exclusive for R410A.

• When charging additional refrigerant, charge the refrigerant from low-pressure side of the port valve using a safety charger.

• Make sure that air purge for this unit at refrigerant replacement is performed from both high-pressure check valve and ser-

vice port. If air purge is performed only from one of them, air in not purged enough.

• When replacing refrigerant, charge the refrigerant from service port. When charged refrigerant is less than specified amount, charge the refrigerant again from low pressure side of the port valve using a safety charger.

• Tighten the service port cap (nut) of stop valve firmly. The tightening torque is 12 to 16 N·m. (to prevent slow-leak)

• Check additional refrigerant charging amount referring to table 4 when liquid pipe is one size larger than standard diameter,

and table 2 when the pipe is standard diameter.

Cooling Heating

Cooling and heating capacity is lowered according to pipe length. Capacity can be obtained by referring to the capacity curves below. When the diameter of gas pipe is one size smaller than standard diameter, cooling capacity is lowered comparing to the standard diameter. The lowered capacity can be obtained by referring to capacity curves for gas pipe which is one size smaller than standard size.

Corrected pipe length (m) = actual pipe length (m) + number of bends x 0.3 (m)

Capacity curves for PUHZ-RP • HA model <Standard size>

100

Capacity ratio [%]

Note: The permitted pipe length is up to 55m for RP1.6, 2, 2.5, 3 model.

5 101520253035404550556065707580

Corrected pipe length

Capacity curve for PUHZ-RP1.6, 2 models

Cooling RP1.6, 2.5 models Cooling RP3 model

Heating RP1.6, 2, 2.5, 3, 4, 5 and 6 models (Up to 55m for RP1.6, 2, 2.5, 3 model)

Cooling RP2, 4 models

Cooling RP5 model

Cooling RP6 model

100

Cooling RP2

Capacity ratio [%]

5 10152025303540455055

Heating RP1.6, RP2

Cooling RP1.6

Corrected pipe length

Capacity curve for PUHZ-RP2.5, 3 models

100

Heating RP2.5, RP3

Cooling RP2.5

Capacity ratio [%]

Cooling RP3

5 10152025303540455055

Corrected pipe length

When gas pipe is one size larger than standard size for PUHZ-RP4, 5 and 6.

1 Capacity can be obtained by referring to capacity curves of standard size.

1. Refrigerant collecting (pump down)

TEST RUN

OFF

<SW4>

A Stop C operation B Cooling D Heating

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1Before collecting the refrigerant, first make sure that the all of the SW5 DIP switches for function changes on the control

board of the outdoor unit are set to OFF. If all of the SW5 switches are not set to OFF, record the settings and then set all of the switches to OFF. Now, start refrigerant collecting operation. After moving the unit to a new location and completing the test run, set the SW5 switches to the previously recorded settings.

2Turn on the power supply (circuit breaker).

wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If

“CENTRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.

3After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor

(outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1 and LED2 on the control board of the outdoor unit are lit. wSet the SWP switch (push-button type) to ON in order to perform refrigerant collecting operation only when the unit is

stopped. However, refrigerant collecting operation cannot be performed until compressor stops even if the unit is stopped. Wait three minutes until compressor stops and set the SWP switch to ON again.

4Because the unit automatically stops in about two to three minutes after the refrigerant collecting operation (LED1 is not lit

and LED2 is lit), be sure to quickly close the gas stop valve. wIn case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then

repeat step 3 three minutes later.

wIf the refrigerant collecting operation has been completed normally (LED1 is not lit and LED2 is lit), the unit will remain

stopped until the power supply is turned off.

5Turn off the power supply (circuit breaker.)

2. Unit replacement operation

When reusing the existing pipes that carried R22 refrigerant for the RP4, RP5 and RP6 models, replacement operation must be performed before performing a test run.

1If new pipes are used, these procedures are not necessary. 2If existing pipes that carried R22 refrigerant are used for the RP3 model, these procedures are not necessary. (The replace-

ment operation cannot be performed.)

3During replacement operation, “C5” is displayed on “A-Control Service Tool(PAC-SK52ST)”. (This is applied to only RP4,

RP5 and RP6 models.)

• Replacement operation procedures

1Turn on the power supply. 2Set DIP switch SW8-2 on the control board of the outdoor unit to ON to start replacement operation.

• The replacement operation is performed using the cooling system. Cool air will flow from the indoor unit during the replacement operation.

• During the replacement operation, is displayed on the remote controller and LED1 (green) and LED2 (red) on the control board of the outdoor unit flash together.

3Replacement operation requires at least two hours to complete.

• After setting switch SW8-2 to ON, the unit automatically stops after two hours.

• Replacement operation can be performed repeatedly by setting switch SW8-2 from OFF to ON. Make sure to perform the

operation more than 2 hours. (If the operation is performed less than 2 hours, the existing pipes cannot be cleaned enough and the unit may be damaged.)

• If replacement operation is performed over 2 hours, this action is recorded into nonvolatile memory of control board.

4Set switch SW8-2 to OFF. (Replacement operation is completed.)

wThe unit can be operated normally by remote controller even if SW8-2 remains ON. wIf the indoor temperature is less than 15:, the compressor will operate intermittently but the unit is not faulty.

3. Start and finish of test run

• Operation from the indoor unit

Execute the test run using the installation manual for the indoor unit.

• Operation from the outdoor unit By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation mode (cooling/heating) can be set up.

1Set the operation mode (cooling/heating) using SW4-2. 2Turn on SW4-1 to start test run with the operation mode set by SW4-2. 3Turn off SW4-1 to finish the test run.

• There may be a faint knocking sound around the machine room after power is supplied, but this is no problem with product because the linear expansion pipe is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor starts operating, but this is no problem with product because the check valve, itself, generates the sound because pressure difference is small in the refrigerant circuit.

Note: The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1, change the operation mode and restart the test run by SW4-1.)

11 TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The inferior phenomenon is reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action according to “11-4. Self-diagnosis action table”.

Conduct trouble shooting and ascertain the cause of the inferior phenomenon according to “11-5. Troubleshooting by inferior phenomena”.

The inferior phenomenon is not reoccurring.

Logged

Not logged

1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise and etc. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the inferior phenomenon occurred, matters related to wiring and etc. 2Reset error code logs and restart the unit after finishing service. 3There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

1Re-check the abnormal symptom. 2Conduct trouble shooting and ascertain the cause of the

inferior phenomenon according to “11-5. Troubleshooting by inferior phenomena”. 3Continue to operate unit for the time being if the cause is not ascertained. 4There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

11-1. TROUBLESHOOTING

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the inferior phenomenon is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.

11-2. Check point under test run

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

TEST RUN button

TEST RUN display

LIQUID PIPE TEMPERATURE display

(MA remote controller)

(1) Before test run

• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-

age, loosened connections and incorrect polarity.

• Measure impedance between the ground and the power supply terminal block(L, N) on the outdoor unit by 500V Merger and check that it is 1.0M" or over.

wDon’t use 500V Merger to indoor/outdoor connecting wire terminal block(S1, S2, S3) and remote controller terminal block

(1, 2). This may cause malfunction.

• Make sure that test run switch (SW4) is set to OFF before turning on power supply.

• Make sure that all of the SW5 switches for function changes on the control board of the outdoor unit are set to OFF. If all of

the SW5 switches are not set to OFF, record the settings and then set all of the switches to OFF. And perform emergency operation. After finishing emergency operation, set the SW5 switches to the recorded settings.

• Turn on power supply twelve hours before test run in order to protect compressor.

• For specific models which requires higher ceiling settings or auto-recovery feature from power failure, make proper changes

of settings referring to the description of “Selection of Functions through Remote Controller”.

Make sure to read operation manual before test run. (Especially items to secure safety.)

11-2-1. Test run by remote controller

Operating procedures

1. Turn on the main power supply.

2. Press TEST RUN button twice.

3. Press OPERATION SWITCH button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for correct running.

While the room temperature display on the remote controller is “H0”, the remote controller is disabled. Wait until “H0” disappears before using remote controller. “H0” appears for about 2 minutes after power supply is turned on. w1

The TEST RUN appears on the screen. Cooling mode:

Heating mode: Check if warm air blows. (It takes a little while until warm air blows.)

Check for correct motion of auto-vanes. The outdoor unit features automatic capacity control to

provide optimum fan speeds. Therefore, the fan keeps running at a low speed to meet the current outside air condition unless it exceeds its available maximum power. Then, in actuality, the fan may stop or run in the reverse direction depending on the outside air, but this does not mean malfunction.

Check if cool air blows and water is drained.

6. Press the ON/OFF button to reset the test run in progress.

7. Turn off the main power supply.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after two hours.

• The room temperature display section shows the pipe temperature of indoor units during the test run.

• Check that all the indoor units are running properly in case of simultaneous twin and triple operation. Malfunctions may not be displayed regardless of incorrect wiring.

w1 After turning on the power supply, the system will go into startup mode, “H0” will blink on the display section of the room

temperature, and lamp(red) of the remote controller will flash. As to INDOOR BOARD LED, LED1 and LED2 will be lit up in case the address is 0, or turned off in case the address is not

0. LED3 will blink. As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will light up. (After the startup mode of the system finishes, LED2(red) will be turned off.) In case OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations doesn’t function correctly, the causes written below should be considered. Find causes from the symptoms. The below symptoms are under test run mode. “startup” in the table means the display status of w1 written above.

Symptoms in test run mode

Remote Controller Display

Remote controller displays “H0”, and cannot be operated.

After power is turned on, “H0” is displayed for 3 minutes, then error code is displayed.

No display appears even when remote controller operation switch is turned on. (Operation lamp does not light up.)

Display appears but soon disappears even when remote controller is operated.

OUTDOOR BOARD LED Display

< > indicates digital display.

After “startup” is displayed, only green lights up. <00> After “startup” is displayed, green(once) and red(once) blink alternately. <F1>

After “startup” is displayed, green(once) and red(twice) blink alternately. <F3, F4, F9>

After “startup” is displayed, green(twice) and red(once) blink

alternately. <EA. Eb> After “startup” is displayed, only

green lights up. <00> After “startup” is displayed, only

green lights up. <00>

Cause

• After power is turned on, “H0” is displayed for 2 minutes during system startup. (Normal)

• Incorrect connection of outdoor terminal block (L, N and S1, S2, S3.)

• Outdoor unit’s safeguard installation connector is open.

• Incorrect wiring between the indoor and outdoor unit (Polarity is wrong for S1, S2, S3.)

• Remote controller transmission wire short.

• There is no outdoor unit of address 0. (Address is other than 0.)

• Remote controller transmission wire burnout.

• After canceling function selection, operation is not possible for about 30 seconds. (Normal)

wPress the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the

LCD

Contents of inferior phenomena

P1 P2 P4 P5 P6 P8 P9

Abnormality of room temperature thermistor Abnormality of pipe temperature thermistor/Liquid Abnormality of drain sensor Drain overflow protection is working. Freezing/overheating protection is working. Abnormality of pipe temperature Abnormality of pipe temperature thermistor/Cond./Eva

LCD

Contents of inferior phenomena

U1~UP

F3~F9 E0~E5

E6~EF

----

FFFF

Malfunction outdoor unit Malfunction

outdoor unit Remote controller transmitting error Indoor/outdoor unit communication error

No error history No applied unit

LED1

(microcomputer power supply)

LED2

(remote controller)

LED3

(indoor/outdoor communication)

Lits when power is supplied. Remote controller The indoor unit should be connected to the outdoor unit with address “0” setting.

Flash when indoor and outdoor unit are communicating.

SW4

A Stop B Cooling C Operation D Heating

(Factory setting)

contents of LCD display.

See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.

11-2-2. Test run by outdoor unit SW4

The setting of test run (ON/OFF) and its operation mode (cooling/heating) can be set by SW4 on the controller board of outdoor unit. Check that SW5-1 is set to OFF before performing test run. If SW5-1 is set to ON, turn it OFF and then perform test run. After finishing test run, set SW5-1 back to ON.

1Set operation mode(cooling or heating) by SW4-2. 2Start test run by setting SW4-1 to ON ( ) with the indicated operation mode of SW4-2. 3Finish test run by setting SW4-1 to OFF ( ).

• Operation mode cannot be changed by SW4-2 during test run. Stop test run to change operation mode by SW4-1, and restart test run by SW4-1 after

the mode is changed.

• Test run automatically stops 2 hours later by 2-hour OFF timer function.

• Test run can be performed by the remote controller.

• The remote controller display of test run by outdoor unit is the same as that of test run by

remote controller.

11-3. Malfunction-diagnosis method by remote controller

Mode number

Setting number

Refrigerant address

Unit number

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

E G

CD H

I A

3(1)

11-3-1. Error history of unit (1) Wired remote controller

If there is a trouble on air conditioner, both indoor unit and outdoor unit will stop and digital display shows what was wrong.

1 “CHECK” and refrigerant address are displayed at set tem-

perature display. Error code and unit number are displayed at clock display alternately. (If outdoor unit is malfunctioning, unit number is 00.)

2 The refrigerant address and error code initially sent from the

unit are displayed in case of group control system which one remote controller controls plural refrigerant systems.

3 Press the “ON/OFF” button to cancel error code.

In case of central control by the controller of MELANS, cancel the error code by the controller of the MELANS, and in case of distant-handy combined operation, cancel the error code by cancelling distant operation.

<Malfunction-diagnosis method at maintenance service>

Digital control has memory function that memorizes latest error code even if it is cancelled by remote controller or power is shut off, so error histories can be searched by following the procedure below.

Search error histories of each unit by remote controller.

1 Turn to self-diagnosis mode.

Press the H “CHECK” button twice within three seconds, and following display appears.

a) Refrigerant address for self-diagnosis

2 Set refrigerant address number that you want to diagnose.

Press the F (temp.) button to set refrigerant address to be diagnosed. Refrigerant address has number from 00 to 15. Three seconds after setting, lighted self-diagnosed refrigerant address begins blinking and self-diagnosis process begins.

3 Self-diagnosis result display

(1) When there is an error history.

(Refer to 11-4. for details of error code contents.) b) Alternating display c) Error code d) Attribute of error search e) Unit number

(2) When there is no error history. (3) When the address does not exist.

4 To cancel self-diagnosis

(2)

(3)

5 (1)

(2)

(3)

There are following two methods to cancel self-diagnosis: Press the H “CHECK” button twice within three seconds. ➜Self-diagnosis is cancelled and the display screen will return to the status before self-diagnosis. Press the I “ON/OFF” button. ➜Self-diagnosis is cancelled and indoor unit will stop. This operation is ineffectual when the operation of remote controller is prohibited. During self-diagnosis at maintenance service, all the indoor units start performing fan operation except for the indoor unit indicating the latest error. Then outdoor units of the same refrigerant system also start performing fan operation

intermittently for 3 minutes. (The fan is on for 3 seconds

and then off for 5 seconds.)

The unit with error can be inspected by using this. In case unit other than indoor unit, such as outdoor unit and controller of MELANS, has an error, all the indoor units of the same refrigerant system stop fan operation and outdoor units operate intermittently for 3 minutes.

5 To delete error code

When something is wrong with air conditioner, error code (P1 etc.) is memorized, but error code can be deleted after termination of service.

(1)Display the error cord at the self-diagnosis result display

screen.

b) Alternating display

(2)The address for self-diagnosis will blink when the D

w button is pressed twice within three seconds.

(3) The display (3) shown on the left will be appeared when

the error cord has been reset. Note that the error content will be redisplayed if error cord resetting is unsuccessful.

Refer to 11-10. Function of switches, connectors and jumpers.

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

RESET

SET

CLOCK

CHECK

CHECK display

Temperature button

CHECK button

Refrigerant address display

HOUR button

ON/OFF button

Inspected unit

Error code

P1 P2 P4 P5 P6 P8 P9

E4, E5

Beep output

beep O 1 time beep O 2 times beep O 4 times beep O 5 times beep O 6 times beep O 8 times beep O 2 times Other than above

Operation LED 1 sec. O 1 time 1 sec.O 2 times 1 sec.O 4 times 1 sec.O 5 times 1 sec.O 6 times 1 sec.O 8 times 1 sec.O 2 times Other than above

Indoor unit

Inspected unit

Check code

F1–F9

U0–UP

E6–EE

No check code

(normal)

Beep output

beep beep O 1 time

Other than above

No output

beep beep beep

Operation LED (0.4sec+0.4sec)

O 1 time

Other than above

Lights off

Outdoor

unit

No check code (mistake of matching with refrigerant

address)

(2) Digital wireless remote controller <In case of trouble during operation>

When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop.

<Malfunction-diagnosis method at maintenance service>

[Procedure]

1. Press the CHECK button twice.

• "CHECK" lights, and refrigerant address "00" flashes.

• Check that the remote controller's display has stopped before continuing.

2. Press the temperature buttons.

• Select the refrigerant address of the indoor unit for the self-diagnosis.

Note: Set refrigerant address using the

outdoor unit’s DIP switch (SW1). (For more information, see the outdoor unit installation manual.)

3. Point the remote controller at the sensor on the indoor unit and press the HOUR button.

• If an air conditioner error occurs, the indoor unit's sensor emits an intermittent buzzer sound, the operation light flashes, and the error code is output. (It takes 3 seconds at most for error code to appear.)

4. Point the remote controller at the

• The check mode is cancelled.

sensor on the indoor unit and press the ON/OFF button.

✽ Malfunction diagnosis can be performed only for refrigerant system control-

ling wireless units.

11-3-2. Wired Remote controller Diagnosis

3(1)

(2)

(3)

(4)

If operation can not be carried out from remote controller, try remote controller diagnosis with following process.

1 First, check the electricity current marker.

When correct voltage (DC12V) is not supplied to remote controller, the electricity current marker is put out. If the electricity current marker is not lighted, check the remote controller wiring and the indoor units.

a) Electric current marker

2 Transfer to remote controller diagnosis mode

Hold down the H “CHECK” button for five seconds or more, and following display appears.

Press the A “FILTER” button, and remote controller diagnosis will begin.

3 Remote controller diagnosis result

(1) When the remote controller is functioning correctly

Check other possible causes, as there is no problem with remote controller. Consider the unit is normal when remote controller transmits the result of diagnosis to indoor or outdoor unit and receives the same data back.

(2) When remote controller has malfunction

The remote controller must be replaced. If the transmitting-receiving circuit is defective, [‘NG’] blinks. "NG" will be displayed when remote controller transmits the result of diagnosis to indoor or outdoor unit, and receives no response.

When there might be other problems than diagnosed remote controller,

(3) There might be noise on transmission path or damage of

other remote controllers or indoor units. Check the trans-

mission path and other controllers. If the transmission is not possible, [E3] blinks. "E3" will be displayed when remote controller transmits the result of diagnosis to indoor or outdoor unit and receives different data back.

(4) The number of data errors means the difference

between the number of bits sent from remote controller

and the actual number of bits sent to transmission path.

If the data error is displayed, noise and etc. are interfer-

ing with the transmission data. Check the transmission

path. If the data error has occurred, [ERC] and number of data errors are displayed.

b) Number of generated data errors (maximum 66 errors)

When the number of data errors is 02. Transmission data from remote controller Transmission data on transmission path

4 Cancel the remote controller diagnosis

Hold down the H “CHECK” button for five seconds or more to cancel remote controller diagnosis, then [H0] operation lamp will blink and the display screen will return to the status before remote controller diagnosis in about 30 seconds.

11-4. SELF-DIAGNOSIS ACTION TABLE

Error Code

None

Meaning of error code and detection method

1 No voltage is supplied to terminal

2 Electric power is not charged

3 Electric power is not supplied to

—

4 Disconnection of reactor (DCL

5 Disconnection of outdoor noise

block(TB1) of outdoor unit.

a) Power supply breaker is put b) Contact failure or discon-

c) Open phase (L or N phase)

to power supply terminal of outdoor power circuit board.

a) Contact failure of power b) Open phase on the outdoor

outdoor controller circuit board.

a) Disconnection of connector

or ACL)

filter circuit board or parts failure in outdoor noise filter circuit board

(Note 1) Refer to indoor unit section for code P and code E.

Case

off. nection of power supply

terminal

supply terminal power circuit board

RP3V :Disconnection of

connector R or S

RP4V~6V :Disconnection of

connector SC-R or SC-S

(CNDC)

1 Check following items.

a) Power supply breaker b) Connection of power supply terminal block.

c) Connection of power supply terminal block.

2 Check following items.

a) Connection of power supply terminal block. b) Connection of terminal on outdoor power

RP1.6-3V :Disconnection of connector R or S. RP4V-6V :Disconnection of connector SC-R

3 Check connection of the connector (CNDC)

on the outdoor controller circuit board. Check connection of the connector, LD1 and LD2 for RP1.6-3V and CNDC for RP4-6V, on the outdoor power circuit board.

Refer to page 48, 52 and 53. .

4 Check connection of reactor. (DCL or ACL)

RP1.6-3V: Check connection of “LO” and

“NO” on the outdoor noise filter circuit board. Check connection of “R” and “S” on the outdoor power circuit board. Refer to page 49, 50 and 52.

RP4-6V: Check connection of “L1” and “L2”

on the active filter module.(ACTM)

Judgment and action

(TB1) (TB1)

(TB1) circuit board.

Refer to page 52.

or SC-S. Refer to page 53.

(5202)

(5201)

(4119)

63L connector open

Abnormal if 63L connector circuit is open for three minutes continuously after power supply. 63L: Low-pressure switch

<PUHZ-RP4~6VHA only>

63H connector open

Abnormal if 63H connector circuit is open for three minutes continuously after power supply. 63H: High-pressure switch

2 connector open

Abnormal if both 63H and 63L connector circuits are open for three minutes continuously after power supply.

63H: High-pressure switch 63L: Low-pressure switch

<PUHZ-RP4~6VHA only>

6 Defective outdoor power circuit

board

7 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of 63L connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63L

3 63L is working due to refriger-

ant leakage or defective parts.

4 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63H

3 63H is working due to defective

parts.

4 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of connector (63H,63L) on outdoor controller circuit board.

2 Disconnection or contact failure

of 63H, 63L

3 63H and 63L are working due

to defective parts.

4 Defective outdoor controller

board.

5 a) Check connection of outdoor noise filter

circuit board.

b) Replace outdoor noise filter circuit board.

Refer to page 49, 50 and 51.

6 Replace outdoor power circuit board. 7 Replace controller board (When items above

are checked but the units can not be repaired.)

1 Check connection of 63L connector on

outdoor controller circuit board. Refer to 11-9.

2 Check the 63L side of connecting wire. 3 Check refrigerant pressure.

Charge additional refrigerant. Check continuity by tester. Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board. 1 Check connection of 63H connector on

outdoor controller circuit board. Refer to 11-9.

2 Check the 63H side of connecting wire. 3 Check continuity by tester.

Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.

1 Check connection of connector(63H,63L) on

outdoor controller circuit board. Refer to 11-9.

2 Check the 63H and 63L side of connecting

wire.

3 Check continuity by tester.

Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.

Error Code

(6844)

(6845)

(6846)

Meaning of error code and detection method Indoor/outdoor unit connector

mis-wiring, excessive number of units (4 units or more)

1. Outdoor controller circuit board can automatically check the number of connected indoor units. Abnormal if the number cannot be checked automatically due to mis-wiring of indoor/outdoor unit connecting wire and etc. after power is turned on for 4 minutes.

2. Abnormal if outdoor controller circuit board recognizes the number of connected indoor units as “4 units or more”.

Mis-wiring of indoor/outdoor unit connecting wire (converse wiring or disconnection)

Outdoor controller circuit board can automatically set the unit number of indoor units. Abnormal if the indoor unit number can not be set within four minutes after power on because of mis-wiring (converse wiring or disconnection) of indoor/outdoor unit connecting wire.

Start-up time over

The unit can not finish start-up process within four minutes after power on.

1 Contact failure or mis-wiring of

2 Diameter or length of

3 4 or more indoor units are 4 Defective transmitting receiving

5 Defective transmitting receiving

6 Defective indoor power board 7 Two or more outdoor units

8 Noise has entered into power

1 Contact failure or mis-wiring of

2 Diameter or length of

4 Defective transmitting receiving

5 Defective transmitting receiving 6 Defective indoor power board.

7 Two or more outdoor units

8 Noise has entered into power

1 Contact failure of indoor/ 2 Diameter or length of indoor/

7 Two or more outdoor units

8 Noise has entered into power

Case

indoor/outdoor unit connecting wire

indoor/outdoor unit connecting wire is out of specified capacity.

connected to one outdoor unit. circuit of outdoor controller

circuit board circuit of indoor controller

board

have refrigerant address “0” . (In case of group control)

supply or indoor / outdoor unit connecting wire.

indoor/outdoor unit connecting wire

indoor/outdoor unit connecting wire is out of specified capacity.

circuit of outdoor controller circuit board.

circuit of indoor controller board

have refrigerant address “0” .

(In case of group control)

supply or indoor/outdoor unit connecting wire.

outdoor unit connecting wire outdoor unit connecting wire is

out of specified capacity. have refrigerant address “0” .

(In case of group control) supply or indoor/outdoor unit

connecting wire.

Judgment and action

1 Check disconnection or looseness or polarity

of indoor/outdoor unit connecting wire of indoor and outdoor units.

2 Check diameter and length of indoor/outdoor

unit connecting wire. Total wiring length: 80m (including wiring connecting each indoor unit and between indoor and outdoor unit) Also check if the connection order of flat cable is S1, S2, S3.

3 Check the number of indoor units that are

connected to one outdoor unit. (If EA is detected)

4~6 Put the power off once, and on again to

check. Replace outdoor controller circuit board, indoor controller board or indoor power board if abnormality occurs again.

7 Check if refrigerant addresses (SW1-3 to

SW1-6 on outdoor controller circuit board) are overlapping in case of group control system.

8 Check transmission path, and remove the

cause.

w The descriptions above, 1-8, are for EA, Eb

and EC.

Error Code

(1302)

(1102)

Meaning of error code and detection method Abnormal high pressure (High-pressure

switch 63H worked)

Abnormal if high-pressure switch 63H worked ( w ) during compressor operation. w RP1.6-2VHA : 4.15 MPa

RP2.5-6VHA : 4.41 MPa RP2.5-6VHA1 : 4.15 MPa

63H: High-pressure switch

Abnormal high discharging temperature

(1) Abnormal if discharge temperature

thermistor (TH4) exceeds 125: or 110: continuously for 5 minutes. Abnormal if condenser/evaporator temperature thermistor (TH5) exceeds 40: during defrosting and discharge temperature thermistor (TH4) exceeds 110:.

(2) Abnormal if discharge super heat

(Cooling: TH4 – TH5 / Heating: TH4 –

TH6) increases. All the conditions in Aor B are detected simultaneously for 10 minutes continuously after 6 minutes past from compressor start-up (including the thermostat indication or recovery from defrosting).

• Heating mode

• When discharge super heat is less than 70 deg.

• When the TH6 temp is more than the value obtained by TH7 – 5 deg.

• When the condensing temp of TH5 is less than 35:.

Case

1 Short cycle of indoor unit 2 Clogged filter of indoor unit 3 Decreased airflow caused by

dirt of indoor fan

4 Dirt of indoor heat exchanger 5 Locked indoor fan motor 6 Malfunction of indoor fan motor 7 Defective operation of stop

valve (Not full open)

8 Clogged or broken pipe 9 Locked outdoor fan motor

0 Malfunction of outdoor fan

motor

1 Short cycle of outdoor unit 2 Dirt of outdoor heat exchanger 3 Decreased airflow caused by

defective inspection of outside temperature thermistor (It detects lower temperature than actual temperature.)

4 Disconnection or contact failure

of connector (63H) on outdoor controller board

5 Disconnection or contact failure

of 63H connection

6 Defective outdoor controller

board

7 Defective action of linear

expansion valve

8 Malfunction of fan driving

circuit

1 Over-heated compressor oper-

ation caused by shortage of refrigerant

2 Defective operation of stop

valve

3 Defective thermistor 4 Defective outdoor controller

board

5 Defective action of linear

expansion valve

Judgment and action

1~6Check indoor unit and repair defectives.

7 Check if stop valve is full open. 8 Check piping and repair defectives.

9~2 Check outdoor unit and repair defectives.

3 Check the inspected temperature of outside

temperature thermistor on LED display. (SW2 on A-Control Service Tool : Refer to page 58.)

4~6Put the power off and check F5 is

displayed when the power is put again. When F5 is displayed, refer to “Judgment and action” for F5.

7 Check linear expansion valve.

Refer to 11-6.

8 Replace outdoor controller board. 1 Check intake super heat.

Check leakage of refrigerant. Charge additional refrigerant.

2 Check if stop valve is full open. 34 Put the power off and check if U3 is dis-

played when the power is put again. When U3 is displayed, refer to “Judgement and action” for U3.

5 Check linear expansion valve.

Refer to 11-6.

• During comp operation (Cooling and

Heating)

• When discharge super heat is less

than 80 deg in Cooling.

• When discharge super heat is less

than 90 deg in Heating.

• When condensing temp of TH6 is

more than –40:. (In Cooling only.)

Error Code

(5104)

U4 (TH3:5105) (TH6:5107) (TH7:5106) (TH8:5110)

(4230)

(4250)

(1520)

Meaning of error code and detection method

Open/short circuit of discharge temperature thermistor (TH4)

Abnormal if open (3: or less) or short (217: or more) is detected during compressor operation. (Detection is inoperative for 10 minutes of compressor starting process and for 10 minutes after and during defrosting.)

Open/short of outdoor unit thermistors (TH3, TH6, TH7, and TH8)

Abnormal if open or short is detected during compressor operation. Open detection of thermistors TH3 and TH6 is inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting. WCheck which unit has abnormality in its

thermistor by switching the mode of SW2. (Refer to page 63.)

1 Disconnection or contact

2 Defective thermistor 3 Defective outdoor controller

1 Disconnection or contact failure

(

2 Defective thermistor 3 Defective outdoor controller

Thermistors

Symbol

TH3 TH6 TH7 TH8

Abnormal temperature of heat sink

Abnormal if heat sink thermistor(TH8) detects temperature indicated below. RP1.6V, 2VHA·······84: RP2.5V, 3VHA·······77: RP4-6VHA·············85:

Abnormality of power module

Check abnormality by driving power module in case overcurrent is detected. (UF or UP error condition)

Abnormality of super heat due to low discharge temperature (RP3VHA)

Abnormal if discharge super heat is continuously detected less than or equal to 0: for 3 minutes even though linear expansion valve has minimum open pulse after compressor starts operating for 10 minutes. (RP1.6-3VHA only)

Thermistor <Outdoor pipe>

Thermistor <Outdoor 2-phase pipe>

Thermistor <Outdoor>

Thermistor <Heat sink>

Name

1 The outdoor fan motor is 2 Failure of outdoor fan motor

3 Air flow path is clogged. 4 Rise of ambient temperature 5 Defective thermistor 6 Defective input circuit of

7 Failure of outdoor fan drive

1 Outdoor stop valve is closed. 2 Decrease of power supply voltage 3 Looseness, disconnection or

4 Defective compressor 5 Defective outdoor power circuit

1 Disconnection or loose

2 Defective holder of discharge 3 Disconnection or loose connection 4 Disconnection or loose

5 Defective linear expansion valve.

Case

failure of connector (TH4) on the outdoor controller circuit board.

circuit board

of connectors Outdoor controller circuit board: TH3,TH6/TH7 Outdoor power circuit board: CN3

circuit board

Open detection Short detection

– 40: or below – 40: or below – 40: or below – 27: or below

locked.

outdoor power circuit board circuit

converse of compressor wiring connection

board

connection of discharge temperature thermistor. (TH4)

temperature thermistor. of linear expansion valve’s coil. connection of linear expansion

valve’s connector.

Judgment and action

1 Check connection of connector (TH4) on the

outdoor controller circuit board. Check breaking of the lead wire for thermistor (TH4). Refer to 11-9.

2 Check resistance value of thermistor (TH4) or

temperature by microcomputer. (Thermistor/TH4: Refer to 11-6.) (SW2 on A-Control Service Tool: Refer to page 58.)

3 Replace outdoor controller board. 1 Check connection of connector (TH3,TH6/TH7)

on the outdoor controller circuit board. Check connection of connector (CN3) on the outdoor power circuit board. Check breaking of the lead wire for thermistor

)

(TH3,TH6,TH7,TH8). Refer to page 48, 52 and 53.

2 Check resistance value of thermistor

(TH3,TH6,TH7,TH8) or check temperature by microcomputer. (Thermistor/TH3,TH6,TH7,TH8: Refer to page 43.) (SW2 on A-Control Service Tool: Refer to

page 58.) 3 Replace outdoor controller circuit board. WEmergency operation is available in case of

abnormalities of TH3, TH6 and TH7. Refer to 11-8.

90: or above 90: or above 90: or above

102: or above

12 Check outdoor fan.

Refer to (9) in “12-2 Trouble shooting by inferior phenomena ” on Service Technical

Guide for OCT04.

3 Check air flow path for cooling. 4 Check if there is something which causes

temperature rise around outdoor unit.

(Upper limit of ambient temperature is 46:.) Turn off power, and on again to check if U5 is displayed within 30 minutes. If U4 is displayed instead of U5, follow the action to be taken for U4.

5 Check resistance value of thermistor (TH8)

or temperature by microcomputer. (Thermistor/TH8: Refer to 11-6.) (SW2 on A-Control Service Tool: Refer to page 58.)

6 Replace outdoor power circuit board. 7 Replace outdoor controller circuit board.

1 Open stop valve. 2 Check facility of power supply. 3 Correct the wiring (U•V•W phase) to

compressor. Refer to page 52 and 53.

4 Check compressor referring to 11-6. 5 Replace outdoor power circuit board.

12 Check the installation conditions of

discharge temperature thermistor (TH4).

3 Check the coil of linear expansion valve.

Refer to page 46.

4 Check the connection or contact of LEV-A and

LEV-B on outdoor controller circuit board.

5 Check linear expansion valve.

Refer to 11-6.

Error Code

(4220)

Meaning of error code and detection method

Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit

Abnormal if any of followings are detected during compressor operation;

• Decrease of DC bus voltage to 310V

• Instantaneous decrease of DC bus voltage to 200V

• Increase of DC bus voltage to RP1.6-3VHA : 420V RP4-6VHA : 400V

• Decrease of input current of outdoor unit to 0.5A only if operation frequency is more than or equal to 40Hz or compressor

current is more than or equal to 5A.

1 Decrease of power supply voltage 2 Disconnection of compressor

3 Defective 52C 4 Disconnection or loose connec-

5 Defective PFC module of outdoor 6 Defective ACT module (RP4- 7 Defective ACT module drive

8 Disconnection or loose connec- 9 Defective 52C drive circuit of

0 Disconnection or loose

. 1 Disconnection or loose

Case

wiring

tion of CN52C power board (RP1.6-3VHA only) 6VHA only) circuit of outdoor power circuit

board (RP4-6VHA only)

tion of CNAF (RP4-6VHA only) outdoor controller circuit board connection of CN5 on the

outdoor power circuit board.

connection of CN2 on the outdoor power circuit board.

Judgment and action

1 Check the facility of power supply. 2 Correct the wiring (U•V•W phase) to compressor.

Refer to page 52 and 53.

3 Replace 52C. 4 Check CN52C wiring.

5 Replace outdoor power circuit board.

(RP1.6-3VHA only)

6 Replace ACT module. (RP4-6VHA only) 7 Replace outdoor power circuit board.

(RP4-6VHA only)

8 Check CNAF wiring. (RP4-6VHA only) 9 Replace outdoor controller circuit board.

0 Check CN5 wiring on the outdoor power

circuit board. Refer to page 52 and 53.

1 Check CN2 wiring on the outdoor power

circuit board. Refer to page 52 and 53.

(4100)

(5300)

(1300)

(4210)

Compressor overcurrent interruption (When compressor locked)

Abnormal if overcurrent of DC bus or compressor is detected within 30 seconds after compressor starts operating.

Current sensor error

Abnormal if current sensor detects –1.5A to

1.5A during compressor operation. (This

error is ignored in case of test run mode.)

Abnormal low pressure (63L worked)

Abnormal if 63L is worked (under-

0.03MPa) during compressor operation.

63L: Low-pressure switch (RP4~RP6VHA only)

Compressor overcurrent interruption

Abnormal if overcurrent DC dc bus or compressor is detected after compressor starts operating for 30 seconds.

1 Stop valve is closed. 2 Decrease of power supply

voltage

3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective compressor 5 Defective outdoor power board

1 Disconnection of compressor

wiring

2 Defective circuit of current

sensor on outdoor power circuit board

1 Stop valve of outdoor unit is

closed during operation.

2 Disconnection or loose connection

of connector (63L) on outdoor controller board

3 Disconnection or loose

connection of 63L

4 Defective outdoor controller board 5 Leakage or shortage of refrigerant 6 Malfunction of linear expansion

valve

1 Stop valve of outdoor unit is

closed.

2 Decrease of power supply volt-

age

3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective fan of indoor/outdoor

units

5 Short cycle of indoor/outdoor

units

6 Defective input circuit of out-

door controller board

7 Defective compressor

1 Open stop valve. 2 Check facility of power supply.

3 Correct the wiring (U•V•W phase) to

compressor.

Refer to page 52 and 53.

4 Check compressor.

Refer to 11-6.

5 Replace outdoor power circuit board.

1 Correct the wiring (U•V•W phase) to

compressor. Refer to page 52 and 53.

2 Replace outdoor power circuit board.

1 Check stop valve. 2~4 Put the power off and on again to check

if F3 is displayed on restarting. If F3 is displayed, follow the F3 processing

direction.

5 Correct to proper amount of refrigerant. 6 Check linear expansion valve.

Refer to 11-6.

1 Open stop valve. 2 Check facility of power supply. 3 Correct the wiring (U•V•W phase) to

compressor. Refer to page 52 and 53.

4 Check indoor/outdoor fan. 5 Solve short cycle. 6 Replace outdoor controller circuit board. 7 Check compressor.

Refer to 11-6.

W Before the replacement of the outdoor

controller circuit board, disconnect the wiring to compressor from the outdoor power circuit board and check the output voltage among phases, U, V, W, during test run. No defect on board if voltage among phases (U-V, V-W and W-U) is same. Make sure to perform the voltage check with same performing frequency.

Error Code

(No display)

(6840)

(6841)

(6607

6608)

(0403)

Meaning of error code and detection method Remote controller communication error

(Signal receiving error)

(1) Abnormal if any signal from IC of refrig-

erant address “0” could not be normally received for three minutes.

(2) Abnormal if sub remote controller could

not receive any signal for two minutes.

Remote controller communication error (Transmitting error)

(1) Abnormal if sub remote controller could

not find blank of transmission path for six seconds.

(2) Abnormal if remote controller could not

finish transmitting 30 times continuously.

Indoor/outdoor unit communication error (Signal receiving error) (Outdoor unit)

(1) Abnormal if outdoor controller circuit

board could not receive anything normally for three minutes.

Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)

(1) Abnormal if “0” receiving is detected 30

times continuously though outdoor controller circuit board has transmitted “1”.

(2) Abnormal if outdoor controller circuit

board could not find blank of transmission path for three minutes.

Non defined error code

This code is displayed when non defined error code is received.

Serial communication error

1.Abnormal if serial communication between outdoor controller circuit board and outdoor power circuit board is defective.

2. Abnormal if communication between

outdoor controller circuit board and M-NET board is not available.

1 Defective communication cir- 2 Defective communication cir-

3 Noise has entered into trans-

4 All remote controllers are set

1 Defective communication cir- 2 Noise has entered into trans-

3 Two remote controllers are set

1 Contact failure of indoor/out- 2 Defective communication circuit 3 Defective communication cir- 4 Noise has entered into indoor/

1 Indoor/ outdoor unit connecting 2 Defective communication circuit 3 Noise has entered power supply.

4 Noise has entered indoor/ out-

1 Noise has entered transmis- 2 Noise has entered indoor/ out- 3 Outdoor unit is not a series of 4 Model name of remote con-

1 Breaking of wire or contact

2 Breaking of wire or contact

3 Defective communication circuit 4 Defective communication circuit

1 Breaking of wire or contact

2 Contact failure of M-NET board 3 Noise has entered into M-NET

Case

cuit of remote controller cuit of indoor controller board

of refrigerant address “0” mission line of remote con-

troller. as “sub” remote controller. In

this case, E4 is displayed at outdoor LED, and E0 is displayed at remote controller.

cuit of remote controller mission line of remote con-

troller. as "main."

(In case of 2 remote controllers)

door unit connecting wire. of outdoor controller circuit board. cuit of indoor controller board outdoor unit connecting wire.

wire has contact failure. of outdoor controller circuit board.

door unit connecting wire.

sion wire of remote controller. door unit connecting wire. power-inverter. troller is PAR-S25A.

failure of connector CN2 between the outdoor controller circuit board and the outdoor power circuit board.

failure of connector CN4 between the outdoor controller circuit board and the outdoor power circuit board.

of outdoor power circuit board of outdoor controller circuit board

for outdoor power circuit board

failure of connector between outdoor controller circuit board and M-NET board

power supply line transmission wire.

Judgment and action

1~3 Diagnose remote controller.

Take actions as follows according to diagnosis result. a) When “RC OK” is displayed,

remote controllers have no problem. Put the power off, and on again to check. If, “H0” is displayed for four minutes or more, replace indoor controller board.

b) When “RC NG” is displayed,

replace remote controller.

c) When “RC E3” or “ERC 00-66” is dis-

played, noise may be causing abnormality.

4 Set a remote controller to main, and the

other to sub.

w The descriptions above, 1-3, are for E0 and

E3.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor or outdoor units.

2~4 Put the power off, and on again to check.

Replace indoor controller board or outdoor controller circuit board if abnormality is displayed again.

1 Check disconnection or looseness of

indoor/outdoor unit connecting wire.

2~4 Put the power off, and on again to check.

Replace outdoor controller circuit board if abnormality is displayed again.

12 Put the power off, and on again to check.

Replace indoor controller board or outdoor controller circuit board if abnormality is displayed again.

3 Replace outdoor unit with power-inverter type

outdoor unit.

4 Replace remote controller with MA remote

controller.

12 Check connection of each connector CN2

and CN4 between the outdoor controller circuit board and the outdoor power circuit board.

3 Replace outdoor power circuit board. 4 Replace outdoor controller circuit board.

1 Check disconnection, looseness, or breaking of

connection wire between outdoor controller circuit board (CNMNT) and M-NET board (CN5).

2 Check disconnection, looseness, or breaking of

connection wire between outdoor controller circuit board(CNMNT) and M-NET board (CND).

3 Refer to (4) in “ 2-2. M-NET Wiring method ”

on Service Technical Guide for OCT04.

Error Code

123456

ON OFF

123456

ON OFF

123456

ON OFF

123456

ON OFF

A-Control Service Tool SW2 setting

Temperature display of indoor liquid pipe Indoor 1

Temperature display of indoor liquid pipe Indoor 2

Temperature display of indoor condenser/ evaporator pipe Indoor 1

Temperature display of indoor condenser/ evaporator pipe Indoor 2

Meaning of error code and detection method Abnormality of pipe temperature

1 Slight temperature difference <Cooling mode> Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes later of compressor start and 6 minutes later of the liquid or condenser/evaporator pipe is out of cooling range. Note 1) It takes at least 9 min. to detect. Note 2) Abnormality P8 is not detected in

drying mode.

Cooling range : Indoor pipe temperature

2 Converse connection of

(TH2 or TH5) – intake temperature (TH1) [ -3 deg

TH: Lower temperature between: liquid

3 Converse wiring of indoor/

pipe temperature and condenser/ evaporator temperature

4 Defective detection of indoor <Heating mode> When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished, the unit is

5 Stop valve is not opened detected as abnormal when condenser/evaporator pipe temperature is not in heating range within 20 minutes.

Note 3) It takes at least 27 minutes to

detect abnormality.

Note 4) It excludes the period of defrosting

(Detection restarts when defrosting mode is over)

Heating range : 3 deg [ (Condenser/

Evaporator temperature(TH5) – intake temperature(TH1))

Case

between indoor room temperature and pipe <liquid or condenser / evaporator> temperature thermistor

• Shortage of refrigerant

• Disconnected holder of pipe <liquid or condenser /

evaporator> thermistor

• Defective refrigerant circuit

extension pipe (on plural units connection)

outdoor unit connecting wire (on plural units connection)

room temperature and pipe <condenser / evaporator> temperature thermistor

completely.

Judgment and action

1~4 Check pipe <liquid or condenser /

evaporator> temperature with room temperature display on remote controller and outdoor controller circuit board. Pipe <liquid or condenser / evaporator> temperature display is indicated by setting SW2 of outdoor controller circuit board as follows.

Conduct temperature check with outdoor controller circuit board after connecting

(

‘A-Control Service Tool(PAC-SK52ST)’.

23Check converse connection of extension

pipe or converse wiring of indoor/outdoor unit connecting wire.

)

<M-NET communication error>

Error Code

(6600)

(6602)

(6603)

Meaning of error code and detection method

Address duplicate definition

This error is displayed when transmission from the units of same address is detected. Note) The address and attribute displayed

Hard ware error of transmission processor

Transmission processor intended to transmit “0”, but “1” appeared on transmission wire. Note) The address and attribute display at

BUS BUSY

1. Over error by collision damage Abnormal if transmitting is not possible for 8-10 minutes continuously because of collision of transmission.

2. Data could not reach transmission wire for 8-10 minutes continuously because of noise or etc.

Note) The address and attribute displayed

at remote controller indicate the controller that detected abnormality.

remote controller indicate the controller that detected abnormality.

at remote controller indicate the controller that detected abnormality.

(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.

Case Judgment and action

1 There are two or more same

address of controller of outdoor unit, indoor unit, FRESH MASTER, or LOSSNAY.

2 Noise has entered into trans-

mission signal and signal was transformed.

Error is detected if wave form is transformed when wiring works of transmission wire of outdoor unit, indoor unit, FRESH MASTER or LOSSNAYare done, or polarity is changed with the power on and transmission data collide each other.

2 Defective transmitting receiving

circuit of transmission processor

Search the unit with same address as abnormality occurred. If the same address is found, shut of the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for two minutes or more after the address is corrected, and put the power on again. Check transmission wave form or noise on transmission wire.

1 If the works of transmission wire is done with

the power on, shut off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for two minutes or more, and put the power on again.

2 Check transmission wave form or noise on

transmission wire.

3 Transmission data is changed by

the noise on transmission. Transmission processor could

not transmit because short cycle voltage of noise and the like have entered into transmission wire continuously.

2 Transmission quantity has

increased and transmission is not possible because there was wiring mistake of terminal block for transmission wire (TB3) and terminal block for central control (TB7) in outdoor unit.

3 Transmission are mixed with

others and occupation rate on transmission wire rose because of defective repeater (a function to connector or disconnect transmission of control and central control system) of outdoor unit, then abnormality is detected.

1 Check if transmission wire of indoor unit,

FRESH MASTER, LOSSNAY, or remote controller is not connected to terminal block for central control (TB7) of outdoor unit.

2 Check if transmission wore of indoor unit,

FRESH MASTER or LOSSNAY is not connected to terminal block for transmission wire of outdoor unit.

3 Check if terminal block for transmission wire

(TB3) and terminal block for central control (TB7) is not connected.

4 Check transmission wave form or noise on

transmission wire.

Error Code

(6606)

Meaning of error code and detection method Communication error with communica-

tion processor

Defective communication between unit processor and transmission processor Note) The address and attribute display at

remote controller indicate the controller that detected abnormality.

1 Data of transmission proces-

2 Address forwarding from unit

Case Judgment and action

sor or unit processor is not transmitted normally because of accidental trouble such as noise or thunder surge.

processor is not transmitted normally because of defective transmission processor hardware.

Shut of the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for two minutes or more, and put the power on again. System returns normally if abnormality was accidental malfunction. If the same abnormality generates again, abnormality-generated controller may be defective.

(6607)

NO ACK signal

1. Transmitting side controller detects abnormal if a massage was transmitted but there is no reply (ACK) that a massage was received. Transmitting side detects abnormality every 30 seconds, six times continuously.

Note) The address and attribute displayed

at remote controller is indicate the controller that did not reply (ACK).

2. If displayed address or attribute is outdoor unit, Indoor unit detects abnormality when indoor unit transmitted to outdoor unit and there was no reply (ACK).

3. If displayed address or attribute is indoor unit, Remote controller detects abnormality when remote controller transmitted to indoor unit and there was no reply (ACK).

Common factor that has no relation with abnormality source. 1 The unit of former address

does not exist as address switch has changed while the unit was energized.

2 Extinction of transmission wire

voltage and signal is caused by over-range transmission wire.

• Maximum distance ······200m

•

Remote controller line

3 Extinction of transmission wire

voltage and signal is caused by type-unmatched transmission wire. Type······

With shield wire-

CVVS, CPEVS

With normal wire (no shield)-

VCTF, VCTFK, CVV CVS, VVR, VVF, VCT

Diameter····1.25mm2or more

4 Extinction of transmission wire

voltage and signal is caused by over-numbered units.

5 Accidental malfunction of

abnormality-detected controller (noise, thunder surge)

6 Defective of abnormality-gen-

erated controller

1 Contact failure of transmission

wire of outdoor unit or indoor unit

2 Disconnection of transmission

connector (CN2M) of outdoor unit

3 Defective transmitting receiv-

ing circuit of outdoor unit or indoor unit

1 During group operation with

indoor unit of multi- refrigerant system, if remote controller transmit to indoor unit while outdoor unit power supply of one refrigerant system is put off or within two minutes of restart, abnormality is detected.

2 Contact failure of transmission

wire of remote controller or indoor unit

3 Disconnection of transmission

connector (CN2M) of indoor unit

4 Defective transmitting receiv-

ing circuit of indoor unit or remote controller

··(12m)

Always try the followings when the error “A7” occurs.

1 Shut off the power supply of outdoor unit and

indoor unit and FRESH MASTER or LOSSNAY at the same time for two minutes or more, and put the power on again. If malfunction was accidental, the unit returns to normal.

2 Check address switch of abnormality-gener-

ated address.

3 Check disconnection or looseness of abnor-

mality-generated or abnormality-detected transmission wire (terminal block and connector)

4 Check if tolerance range of transmission wire

is not exceeded.

5 Check if type of transmission wire is correct

or not.

If there were some trouble of 1-5 above, repair the defective, then shut off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for two minutes or more, and put the power on again.

• If there was no trouble with 1-5 above in single refrigerant system (one outdoor unit), controller of displayed address or attribute is defective.

• If there was no trouble with 1-5 above in different refrigerant system (two or more outdoor units), judge with 6.

6 If address of abnormality source is the

address that should not exist, there is the unit that memorizes nonexistent address information. Delete useless address information with manual setting function of remote controller. Only the system FRESH MASTER or LOSSNAY are connected to, or the system that is equipped with group setting of different refrigerant system.

If there was no trouble with 1-6 above, replace the controller board of displayed address or attribute. If the unit does not return normally, multi-controller board of outdoor unit may be defective (repeater circuit). Replace multi-controller board one by one to check if the unit returns normally.

Continued to the next page.

From the previous page.

Error Code

Meaning of error code and detection method

4. If displayed address or attribute is remote controller, Indoor unit detects abnormality when indoor unit transmitted to remote controller and there was no reply (ACK).

Case Judgment and action

1 During group operation with

indoor unit of multi- refrigerant system, if indoor unit transmit to remote controller while outdoor unit power supply of one refrigerant system is put off or within two minutes of restart, abnormality is detected.

2 Contact failure of transmission

wire of remote controller or indoor unit

3 Disconnection of transmission

connector (CN2M) of indoor unit

4 Defective transmitting receiv-

ing circuit of indoor unit or remote controller

Same as mentioned in “A7” of the previous page.

(6607)

5. If displayed address or attribute is

FRESH MASTER, Indoor unit detects abnormality when indoor unit transmitted to FRESH MASTER and there was no reply (ACK).

6. If displayed address or attribute is

LOSSNAY, Indoor unit detects abnormality when indoor unit transmitted to LOSSNAY and there was no reply (ACK).

1 During sequential operation of

indoor unit and FRESH MASTER of other refrigerant system, if indoor unit transmits to FRESH MASTER while outdoor unit power supply of same refrigerant system with FRESH MASTER is put off or within two minutes of restart, abnormality is detected.

2 Contact failure of transmission

wire of indoor unit or FRESH MASTER

3 Disconnection of transmission

connector (CN2M) of indoor unit or FRESH MASTER

4 Defective transmitting receiv-

ing circuit of indoor unit or FRESH MASTER

1 If the power supply of LOSS-

NAY is off, indoor unit detects abnormality when it transmits to LOSSNAY.

2 During sequential operation of

indoor unit and LOSSNAY of other refrigerant system, if indoor unit transmits to LOSSNAY while outdoor unit power supply of same refrigerant system with LOSSNAY is put off or within two minutes of restart, abnormality is detected.

3 Contact failure of transmission

wire of indoor unit of LOSSNAY

4 Disconnection of transmission

connector (CN2M) of indoor unit

5 Defective transmitting receiv-

ing circuit of indoor unit or LOSSNAY

7. If displayed address or attribute is

nonexistent,

1 The unit of former address

does not exist as address switch has changed while the unit was energized.

2 Abnormality is detected when

indoor unit transmitted because the address of FRESH MASTER and LOSSNAY are changed after sequential operation of FRESH MASTER and LOSSNAY by remote controller.

Error Code

(6608)

Meaning of error code and detection method

M-NET•NO RESPONSE

Abnormal if a massage was transmitted and there were reply (ACK) that massage was received, but response command does not return. Transmitting side detects abnormality every 30 seconds, six times continuously. Note) The address and attribute displayed

at remote controller is indicate the controller that did not reply (ACK).

1 Transmitting condition is

2 Extension of transmission wire

3 Extension of transmission wire

4 Accidental malfunction of

Case Judgment and action

repeated fault because of noise and the like.

voltage and signal is caused by over-range transmission wire.

• Maximum distance ······200m Remote controller line

•

voltage and signal is caused by type-unmatched transmission wire. Type······

With shield wire-

CVVS, CPEVS

With normal wire (no shield)-

VCTF, VCTFK, CVV CVS, VVR, VVF, VCT

Diameter····1.25mm2or more abnormality-generated

controller

··(12m)

1 Check transmission wave form or noise on

transmission wire.

2 Shut off the power supply of outdoor unit and

indoor unit and FRESH MASTER or LOSSNAY at the same time for two minutes or more, and put the power on again. If malfunction was accidental, the unit returns to normal. If the same abnormality generates again, controller of displayed address and attribute may be defective.

11-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

Phenomena

1. Remote controller display does not work.

2. “H0” display is remained on the remote controller.

1DC12V is not supplied to remote controller.

(Power supply display is not indicated on LCD.)

2DC12~15V is supplied to remote controller, however,

no display is indicated.

• “H0” is not displayed.

• “H0” is displayed.

1At longest 2 minutes after the power supply “H0” is

displayed to start up.

2Communication error between the remote controller

and indoor unit

3Communication error between the indoor and outdoor

unit

4Outdoor unit protection device connector is open.

Factor Countermeasure

1Check LED2 on indoor controller board.

(1) When LED2 is lit.

Check the remote controller wiring for breaking or contact failure.

(2) When LED2 is blinking.

Check short circuit of remote controller wiring.

(3) When LED2 is not lit.

Refer to No.3 below.

2Check the following.

• Failure of remote controller if “H0” is not displayed

• Refer to No.2 below if “H0” is displayed.

1Normal operation 2Self-diagnosis of remote controller 3“H0” is displayed for 6 minutes at most. in

case of indoor/outdoor unit communica- tion error. Check LED3 on indoor controller board. (1)When LED3 is not blinking.

Check indoor/outdoor connecting wire for mis-wiring. (Converse wiring of S1 and S2, or break of S3 wiring.)

(2)When LED3 is blinking.

Indoor/outdoor connecting wire is normal.

4Check LED display on outdoor controller

circuit board. Refer to page 56 and 57. Check protection device connector (63L and 63H) for contact failure. Refer to 11-9.

3. When pressing the remote controller operation switch the OPERATION display is appeared but it will be turned off soon.

1After cancelling to select function from the remote

controller, the remote controller operation switch will be not accepted for approx. 30 seconds.

1Normal operation

Phenomena

4. Even controlling by the wireless remote controller no beep is heard and the unit does not start operating. Operation display is indicated on wireless remote controller.

5. When operating by the wireless remote controller, beep sound is heard, however, unit does not start operating.

6. Remote controller display works normally and the unit performs cooling operation, however, the capacity cannot be fully obtained. (The air does not cool well.)

7. Remote controller display works normally and the unit performs heating operation, however, the capacity cannot be fully obtained.

Factor

1The pair number settings of the wireless remote

controller and indoor controller board are mismatched.

1No operation for 2 minutes at most after the power

supply ON.

2Hand-held remote controller operation is prohibited.

• Remote controlling adaptor is connected to CN32 on the indoor controller board.

• Hand-held remote controller operation is prohibited

by centralised controller etc. since it is connected to MELANS.

3Factor of No.2 above. 1Refrigerant shortage

2Filter clogging 3Heat exchanger clogging 4Air duct short cycle

1Linear expansion valve fault

Opening cannot be adjusted well due to linear expansion valve fault.

2Refrigerant shortage 3Lack of insulation for refrigerant piping 4Filter clogging 5Heat exchanger clogging 6Air duct short cycle 7Bypass circuit of outdoor unit fault

Countermeasure

1Check the pair number settings.

1Normal operation 2Normal operation

3Check the details of No.2 above. 1• If refrigerant leaks, discharging tempera-

ture rises and LEV opening increases. Inspect leakage by checking the tem- perature and opening.

• Check pipe connections for gas leakage.

2Open suction grill and check the filter.

Clean the filter by removing dirt or dust on it.

3• If the filter is clogged, indoor pipe tem-

perature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pres sure.

• Clean the heat exchanger.

4Remove the shield.

1• Discharging temperature and indoor

heat exchanger temperature does not rise. Inspect the failure by checking discharging pressure.

• Replace linear expansion valve.

2• If refrigerant leaks, discharging tempera

ture rises and LEV opening increases. Inspect leakage by checking the temperature and opening.

• Check pipe connections for gas leakage.

3Check the insulation. 4Open suction grill and check the filter.

Clean the filter by removing dirt or dust on

it.

5• If the filter is clogged, indoor pipe tem-

perature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pressure.

• Clean the heat exchanger.

6Remove the shield. 7Check refrigerant system during operation.

8. 1For 3 minutes after temperature adjuster turns off, the compressor will not start operating even if temperature adjuster is turned on.

2For 3 minutes after temperature

adjuster turns on, the compressor will not stop operating even if temperature adjuster is turned off. (Compressor stops operating immediately when turning off by the remote controller.)

12Normal operation

(For protection of compressor)

12Normal operation

11-6. HOW TO CHECK THE PARTS

1 2 3 4 5 6

Blue

Brown

Yellow

Orange

Red

White

Parts name

Check points

Disconnect the connector then measure the resistance using a tester. (Surrounding temperature 10:~30:)

Disconnect the connector then measure the resistance using a tester. (

Winding temperature 20

Thermistor (TH3) <Outdoor pipe>

Thermistor (TH4) <Discharge>

Thermistor (TH6) <Outdoor 2-phase pipe>

Thermistor (TH7) <Outdoor>

Thermistor (TH8) <Heat sink>

Normal

160k"~410k"

4.3k"~9.6k"

39k"~105k"

TH4 TH3 TH6 TH7 TH8

Abnormal

Open or short

Normal

(1) - (6)

Red - White

(1) - (4)

Red - Orange

(2) - (5)

Brown - Yellow

(2) - (3)

Brown - Blue

Abnormal

46±4"

Measure the resistance between the terminals using a tester. (Surrounding temperature 20

)

Solenoid valve coil <Four-way valve> (21S4)

Pin number of relay connector is different from that motor connector

Motor for compressor (MC)

Linear expansion valve ( LEV(A),LEV(B) )

Normal

Abnormal

Open or short

RP1.6-3V RP4-6V

Open or short

Measure the resistance between the terminals using a tester. (Surrounding temperature 20

)

Normal

1197±10"

Abnormal

Open or short

Solenoid valve coil <Bypass valve> (SV) RP2.5-6VHA only

Measure the resistance between the terminals using a tester. (Winding temperature 20:)

Fan motor(MF1,MF2)

Normal

RP1.6V, 2V

66.5±3.3"

RP2.5-6V

15.1±0.5"

2350±170" 1370±100"

RP1.6V, 2V RP4-6V

0.300"~0.340"

RP2.5V, 3V

0.865"~0.895" 0.266"

Measure the resistance between the terminals using a tester. (Winding temperature 20:)

Normal

Abnormal

Open or short

Relay connector

Abnormal

Open or short

Red — Black Black — White White — Red

Red

V U

White Black

PUHZ-RP1.6HA PUHZ-RP2VHA PUHZ-RP2.5VHA PUHZ-RP2.5VHA PUHZ-RP3VHA PUHZ-RP3VHA1 PUHZ-RP4VHA PUHZ-RP4VHA1 PUHZ-RP5VHA PUHZ-RP5VHA1 PUHZ-RP6VHA PUHZ-RP6VHA1

11-7. HOW TO CHECK THE COMPONENTS

-20 -10 0 10 20 30 40 50 Temperature (:)

Resistance (k")

200

150

100

25 50 75 100 125

Temperature (:)

Resistance (k")

500

400

300

200

100

50 75 100 120

Temperature (:)

Resistance (k")

Low temperature thermistors

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Outdoor 2-phase pipe> (TH6)

• Thermistor <Outdoor> (TH7) Thermistor R0 = 15k' ±3%

B constant = 3480K ± 2%

t =15exp{3480(

0: 15k' 10: 9.6k' 20: 6.3k' 25: 5.2k'

Medium temperature thermistor

• Thermistor <Heat sink> (TH8)

273+t – 273

30: 4.3k' 40: 3.0k'

)}

Thermistor R50 = 17k' ±2% B constant = 4150K ± 3%

t =17exp{4150(

273+t – 323

0: 180k' 25: 50k' 50: 17k' 70: 8k' 90: 4k'

High temperature thermistor

• Thermistor <Discharge> (TH4) Thermistor R120 = 7.465k' ±2%

B constant = 4057K ± 2%

t =7.465exp{4057(

R 20: 250k'

30: 160k' 40: 104k' 50: 70k' 60: 48k'

273+t – 393

70: 34k' 80: 24k' 90: 17.5k' 100: 13.0k' 110: 9.8k'

)}

Open

Extra tightning (about 32 pulse)

Pulse number

500 pulse Opening a valve all the way

Valve position (capacity)

LEV

Red

Brown

Blue

Orange

Yellow

White

Connector LEV-A

LEV-B

DC12V

Outdoor controller board

Drive circuit

Linear expansion valve

ON OFF OFF OFF

ON OFF OFF

OFF

ON OFF OFF

OFF

ON ON

OFF

Output

(Phase)

Output

[2 [3

234

5678

OFF OFF

OFF

OFF OFF

ON ON

OFF OFF OFF

ON OFF OFF

(1) Operation summary of the linear expansion valve.

• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the outdoor controller board.

• Valve position can be changed in proportion to the number of pulse signal. <Connection between the indoor controller board and the linear expansion valve>

(2) Linear expansion valve operation

Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8

Closing a valve : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1

The output pulse shifts in above order.

❈ 1. When linear expansion valve operation stops, all output phase

become OFF.

❈ When the switch is turned on, 700 pulse closing valve signal will

be sent till it goes to

A point in order to define the valve position.

(The pulse signal is being sent for about 20 seconds.)

When the valve moves smoothly, there is no noise or vibration occurring from the linear expansion valve : however, when the pulse number moves from B to A or when the valve is locked,

more noise can be heard than normal situation. No noise is heard when the pulse number moves from B to A in case coil is burn out or motor is locked by open-phase.

❈ Noise can be detected by placing the ear against the screw dri-

ver handle while putting the screw driver to the linear expansion

valve.

(3) How to attach and detach the coil of linear expansion valve

<Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below.

Coil

Lead wire

Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward. Be sure to detach the coil holding main body firmly. Otherwise pipes can bend due to pressure.

Stopper

Main body

Hold the lower part of the main body (shown as A) firmly so that the main body does not move and attach the coil by inserting it downward into the main body. Then securely attach the coil stopper to pipe B. (At this time, be careful that stress is not added to lead wire and main body is not wound by lead wire.) If the stopper is not firmly attached to pipe B, coil may be detached from the main body and that can cause defective operation of linear expansion valve. To prevent piping stress, be sure to attach the coil holding the main body of linear expansion valve firmly. Otherwise pipe may break.

Be sure to attach the stopper to pipe B.

11-8. EMERGENCY OPERATION

SW4

1 2 Cooling

Heating

OFF

CN31

Shorting pins

SW4

1 2 Cooling

Heating

Inspected content Open/short of pipe thermistor (TH3/TH6) Indoor/outdoor unit communication error •Signal receiving error (Outdoor unit) Indoor/outdoor unit communication error •Transmitting error (Indoor unit) Communication error other than outdoor unit Communicaiton error between outdoor controller board and M-NET board (Serial communication error)

Error code

U4 E8 E9

E0 ~ E7

●When following abnormalities occur, emergency operation will be available.

(1) When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor

unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency operation switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.

(2) Check the following items and cautions for emergency operation

1Make sure that there is no abnormality in outdoor unit other than the above abnormalities. (Emergency operation will

not be available when error code other than the above are indicated.)

2For emergency operation, it is necessary to set the emergency operation switch (SWE) on indoor controller board. Refer

to the electrical wiring diagram of indoor unit for how to set the indoor unit.)

3During emergency operation, the air-conditioner will continuously be operated by supplying power and stopping it: It can

not be turned on or off by remote control, and temperature control is not possible.

4Do not perform emergency heating operation for an extended period of time: If the outdoor unit starts defrosting during

this period, cold air will blow out from the indoor unit.

5Do not perform emergency cooling operation for more than 10 hours: Neglecting this could result in freezing the heat

exchanger in indoor unit.

(3) Emergency operation procedure

1Turn the main power supply off. 2Turn on the emergency operation switch (SWE) on indoor controller board. 3Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to ON. 4Use SW4-2 on outdoor controller board to set the operation mode (cooling or heating). (SW4-1 is not used.)

5Turning the main power supply on will start the emergency operation.

(4) Releasing emergency operation

1Turn the main power supply off. 2Set the emergency operation switch (SWE) on indoor controller board to OFF. 3Set the shorting pins of emergency operation connector (CN31) on outdoor controller

board to OFF.

4Set SW4-2 on outdoor controller board as shown in the right.

wIf shorting pins are not set on emergency operation connector (CN31), the setting remains OFF.

11-9. TEST POINT DIAGRAM Outdoor controller circuit board

PUHZ-RP1.6VHA PUHZ-RP4VHA PUHZ-RP2VHA PUHZ-RP4VHA1 PUHZ-RP2.5VHA PUHZ-RP5VHA PUHZ-RP2.5VHA1 PUHZ-RP5VHA1 PUHZ-RP3VHA PUHZ-RP6VHA PUHZ-RP3VHA1 PUHZ-RP6VHA1

Communication power supply ZD71 Voltage developed across: 16-30V DC

FAN11•FAN21 (FAN21 is only for RP4-6VHA.) Connect to fan motor (MF).

FAN12•FAN22 (FAN22 is only for RP4-6VHA.) Connect to fan motor (MF) (Detection of position)

1 to 5 2 to 5 3 to 5

5V DC pulse (Detected while the

}

motor is rotating.)

1 to 4 : +

[

5 : –

]

CNS (Indoor/outdoor unit

connecting wire)

CN2

Connect to the outdoor power circuit board (CN2) 1-5: Power circuit board

Transmitting signal to the controller circuit board (0-5V DC) 2-5: Zero cross signal

(0-5V DC)

3-4: Not used

(RP1.6-3VHA)

18V DC (RP4-6VHA)

6-5: 15V DC 7-5: 15V DC

[5: – 1,2,6,7: + ] [4: – 3: + ]

CNAC 1 to 3: Power supply for outdoor controller circuit board (220V-240V AC) 5 to 7: Power supply for indoor/outdoor unit connection wire (220V-240V AC)

21S4 Four-way valve

63H High pressure switch

63L Low pressure switch Only for RP4-6VHA

52C 52C relay Only for RP4-6VHA

SV2 RP2.5-3:Bypass valve RP4-6:Replace valve

Test point for voltage check (Between 1 to 3

220-240V AC)

–

➔

CN4 Transmission to outdoor power circuit board (CN4)

CN52C 52C relay (Connect to the outdoor noise filter circuit board (CN52C)) Only for RP1.6-3VHA

LED1, LED2 Operating inspection indicators LED3: Short-circuited (with jumper wire mounted) LED4: Not used (nothing mounted)

SWP Pump down

CN31 Emergency operation

CNDC 300-380V DC

Connect from

}

outdoor power

–

circuit board (LD1-LD2)

LEV-A, LEV-B Linear expansion valve

TH6 Thermistor

TH7 Thermistor<Outdoor>

TH3 Thermistor <Outdoor pipe>

TH4 Thermistor <Discharge>

CNDM

1 to 2: Input of silent mode 1 to 3: Input of external

contact point

CNVMNT Connected to outdoor M-NET board

CNM A-control service inspection kit

CNMNT Connected to outdoor M-NET board

Control power

supply voltage

}

–

5V DC:

4.75-5.25V DC

SW6(J1~J6) Model setup

SW1 Forced defrost, detect history record reset, refrigerant address

SW4 Test operation

SW5 Function switch

Outdoor noise filter circuit board PUHZ-RP1.6VHA PUHZ-RP2VHA

LI, NI Voltage of 220-240V AC is input. (Connect to the terminal block(TB1))

CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC))

EI Connect to the earth

CN5 Primary current (Connect to the outdoor power circuit board (CN5))

LO, NO Voltage of 220-240V AC is output. (Connect to the ACL)

CN52C 52C relay signal (Connect to the outdoor controller circuit board (CN52C))

Outdoor noise filter circuit board PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

EI Connect to the earth

LI, NI Voltage of 220-240V AC is input. (Connect to the terminal block(TB1))

CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC))

CN5 Primary current (Connect to the outdoor power circuit board (CN5))

CN52C 52C relay signal (Connect to the outdoor controller circuit board (CN52C))

LO, NO Voltage of 220-240V AC is output. (Connect ACL)

Outdoor noise filter circuit board PUHZ-RP4VHA PUHZ-RP4VHA1 PUHZ-RP5VHA PUHZ-RP5VHA1 PUHZ-RP6VHA PUHZ-RP6VHA1

LO, NO Voltage of 220-240V AC is output (Connect to the outdoor power circuit board (SC-R, SC-S))

CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC))

EI Connect to the earth

CN5 Primary current (Connect to the outdoor power circuit board (CN5))

LI, NI Voltage of 220-240V AC is input (Connect to the terminal block(TB1))

Outdoor Power circuit board PUHZ-RP1.6VHA PUHZ-RP2VHA PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

Brief Check of DIP-IPM and DIP-PFC W Usually, they are in a state of being short-circuited if they are broken.

Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken.

1. Check of DIP-IPM P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W

2. Check of DIP-PFC P1 - L , P1 - N , L - N1 , N - N1

Note:The marks, L , N , N1 , N2 , P1 , P2 , U , V and W shown in the diagram above are not actually printed on the board.

LD1-LD2 300-380V DC Connect to the outdoor controller circuit board (CNDC)

(Red)

–

(White)

R, S Connect to the ACL 220-240V AC

P1 N L N1

U, V, W Connect to the compressor (MC) Voltage among phases: 5V to 180V AC

W V U P2

DIP-PFC

LD9 Connect to the earth Only RP2.5, 3VHA

DIP-IPM

CN2 Connect to the outdoor controller circuit board (CN2) 1-5:Outdoor power circuit board to the outdoor controller circuit board (0-5V DC)

2-5: Zero cross signal (0-5V DC) 3-4: Not used 6-5: 15V DC 7-5: 15V DC

1, 2, 6, 7 : +

[

➔ Transmitting signal

]

5 : –

CN3 Thermistor <Heat sink> (TH8)

CN4 Connect from the outdoor controller circuit board (CN4)

CN5 Primary current detection (Connect to the outdoor noise filter circuit board (CN5))

Outdoor Power circuit board PUHZ-RP4VHA PUHZ-RP4VHA1 PUHZ-RP5VHA PUHZ-RP5VHA1 PUHZ-RP6VHA PUHZ-RP6VHA1

CN5 Detection of primary current (Connect to the outdoor noise filter circuit board (CN5))

CN3 Temperature <Heat sink> (TH8)

Brief Check of POWER MODULE W Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken.

1. Check of POWER MODULE

1.Check of DIODE circuit

2.Check of IGBT circuit

P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W

Note:The marks, L , N , N1 , N2 , P1 , P2 , U , V and W shown in the diagram above are not actually printed on the board.

CN4 Connect to the outdoor controller circuit board (CN4)

L - P1 , N - P1 , L - N1 , N - N1

CN2 Connect to the outdoor controller circuit board (CN2) 1-5: Power circuit board

signal to the controller board (0-5V DC)

CNAF Connect to ACTM

2-5: Zero cross signal (0-5V DC) 3-4: 18V DC 6-5: 15V DC 7-5: 15V DC

[ 5 : – 1, 2, 6, 7 : + ] [ 4 : – 3 : + ]

➔ Transmitting

TAB-U, TAB-V, TAB-W Connect to the compressor (MC) Voltage among phases:

5V-180V AC

SC-R, SC-S Connect to the outdoor noise filter circuit board (LO, NO) 220V-240V AC

SC-P2, SC-N2 Connect to ACTM and the soothing capacitor

SC-P1 Connect to 52C

SC-N1 Connect to ACTM

POWER MODULE

CNDC

–

300V-370V DC

}

Connect to the outdoor controller circuit board (CNDC)

Switch

Type

switch

Dip

switch

SW1

1 2

No.

Function Effective timing

Action by the switch operation

Compulsory defrosting Start Normal

When compressor is working in heating operation. w

Abnormal history clear

Refrigerant address setting

When power supply ON

Clear Normal off or operating

SW4

Test run Operating OFF

Under suspension

Test run mode setting Heating Cooling

ON OFF

123

0123

456ON123456ON123456ON123456

123

4567

456ON123456ON123456ON123456

123

891011

456ON123456ON123456ON123456

123

12 13 14 15

456ON123456ON123456ON123456

11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

1 2 3

3 4 5 6 1 2 3

ON OFF

No.

Function Effective timing

Action by the switch operation

No function

Power failure

automatic recovery w1

No function No function

No function No function No function No function

Use of existing pipe

Replacement operation

No function

Pump down

Switch

SW5

SW7

Dip

switch

Push

switch

SW8

SWP

Type of

Switch

—

Auto recovery

— —

— — — —

Used

Start

—

Start

—

No auto recovery

— —

— — — —

Not used

Normal

—

Normal

—

When power supply ON

— —

Always

— — — —

Always

Under suspension

—

Under suspension

Switch to “Low-level Sound Priority Mode”

OFF

Mode 1 Mode 2 Mode 3

OFF

2 Cooling

Regulate max Hz to spec.

Only TH7 } 30°C regulate max Hz to spec.

No regulation

Heating

Low-level Sound Priority Mode

(1) Function of switches

Compulsory defrosting should be done as follows.

1Change the DIP SW1-1 on the outdoor controller board from OFF to ON. 2Compulsory defrosting will start by the above operation 1 if these conditions written below are satisfied.

• Heat mode setting

• 10 minutes have passed since compressor started operating or previous compulsory defrosting finished.

• Pipe temperature is less than or equal to 8:. 3Compulsory defrosting will finish if certain conditions are satisfied. wCompulsory defrosting can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.

After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again. This

depends on the service conditions.

w1 Power failure automatic recovery’ can be set by either remote controller or this DIP SW. If one of them is set to ON,

‘Auto recovery’ activates. Please set “Auto recovery” basically by remote controller because all units have not DIP SW.

Please refer to mode 01 in the table on page 66.

w2 SW7-1,2 to “Low-level Sound Priority Mode” available in “Low-level Sound Priority Mode” mode only.

(2) Function of connectors and jumpers

CN31

Types Connector Function Effective timing

Connector

SW6

Jumper

SW6-1

(J1)

SW6-2

(J2)

SW6-3

(J3)

SW6-4

(J4)

SW6-5

(J5)

SW6-6

(J6)

Model

SW6(JP)

Start

Short Open

Action by open/ short operation

Capacity settings

Emergency operation

When power supply ON

:ON(Short) :OFF(Open)

PUHZ-RP1.6VHA PUHZ-RP2VHA PUHZ-RP2.5VHA PUHZ-RP3VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA

Normal

456

Special function

(a) Low-level sound priority mode (Local wiring)

Unit enters into Low-level sound priority mode by SW7-1, 2 and external signal input setting. Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual. Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for Demand input located on the outdoor controller board enables to control compressor operation frequency. In Low-level sound priority mode, the maximum outdoor fan steps is regulated to 8 and the maximum operation frequency of the compressor is regulated to specified range in cool mode. In heating mode, the maximum compressor operation frequency is regulated to specified range. W The performance is depends on the load of conditioned air of the room.

How to wiring

Purchased at local

Relay supply

SW1

SW1 : Switch X : Relay (Contact spec. : DC1mA)

1) Make the circuit as shown above with Adaptor for external signal input(PAC-SC36NA).

2) Turn SW1 to on for Low-level sound priority mode. Turn SW1 to off to release Low-level sound priority mode and normal operation.

(b) On demand control (Local wiring)

Demand control is available by external input. In this mode, the outdoor unit stops and indoor unit operates with fan mode. W The setting of SW-7 is not required for the demand control.

How to wiring Basically, the wiring is the same. Connect an SW 1 which is procured at field to the between Orange and Red(1 and 3) of the Adaptor for external signal

input(PAC-SC36NA), and insulate the tip of the brown lead wire.

<Low-level sound priority mode circuit>

Insulate this point securely as this is not used.

Max. 10 m including local wiring

Adaptor for external signal input (PAC-SC36NA)

Red

Brown

Orange

2 1

Outdoor unit controller board

3 2 1

CNDM

CNDM

F3 F5 F9

—

E6 E7

—

E0 E3 E4 E5 EF

A0~A8

[Display] (1)Normal condition

(2)Abnormal condition

Unit condition

Outdoor controller board A-Control Service Tool

LED1 (Green) LED2 (Red) Error code

When the power is turned on When unit stops When compressor is warming up When unit operates

Lighted Lighted Lighted Lighted

Lighted

Not lighted

Indication of the display

Alternately blinking display

Operation mode

Not lighted

Lighted

00, etc. 08, etc.

C5, H7 etc.

Indication Error

Error code

Outdoor controller board

Contents Inspection method

LED1 (Green) LED2 (Red) 1 blinking 2 blinking

2 blinking 1 blinking

2 blinking

3 blinking

4 blinking

5 blinking

Connector(63L) is open.

Connector(63H) is open.

2 connectors are open.

Startup time over

Error code is not defined.

Mis-wiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)

Mis-wiring of indoor/outdoor unit connecting wire (converse wiring or disconnection)

Indoor/outdoor unit communication error (signal receiving error) is detected by indoor unit.

Indoor/outdoor unit communication error (transmitting error) is detected by indoor unit.

Indoor/outdoor unit communication error (signal receiving error) is detected by outdoor unit.

Indoor/outdoor unit communication error (transmitting error) is detected by outdoor unit.

Remote controller signal receiving error is detected by remote controller.

Remote controller transmitting error is detected by remote controller.

Remote controller signal receiving error is detected by indoor unit.

Remote controller transmitting error is detected by indoor unit.

Serial communication error <Communication between outdoor controller board and outdoor power board> <Communication between outdoor controller board and M-NET p.c. board>

Communication error of high prior signal(M-NET)

W1.Error code displayed on remote controller. W2.Refer to service manual for indoor unit.

Check if indoor/outdoor connecting wire is connected correctly.

Check if 4 or more indoor units are connected to outdoor unit. 3Check if noise entered into indoor/outdoor connecting wire or power supply.

4Re-check error by turning off power, and on again.

Check if connector (63L or 63H) on the outdoor controller

board is not disconnected.

Check continuity of pressure switch (63L or 63H) by tester.

Check if connector (CN4) on outdoor controller board and outdoor power board is not disconnected.

Check if there is poor connection of connector on outdoor controller board(CNMNT and CNVMNT).

Check M-NET communication signal.

1Check if remote controller is MA remote controller(PAR-20MAA). 2Check if noise entered into transmission wire of remote controller. 3Check if noise entered into indoor/outdoor connecting wire. 4Re-check error by turning off power, and on again.

1Check if connecting wire of indoor unit or remote controller

is connected correctly. 2Check if noise entered into transmission wire of remote controller.

3Re-check error by turning off power, and on again.

Check if indoor/outdoor connecting wire is connected correctly.

Check if noise entered into indoor/outdoor connecting wire or power supply.

Check if noise entered into indoor/outdoor controller board.

Re-check error by turning off power, and on again.

P.32 P.32 P.32 P.33

P.33 P.33

w2 w2

P.37 P.37 P.37 P.37

w2 w2

P.37

P.38~

P.41

Detailed

reference

page

The blinking patterns of both LED1(green) and LED2(red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on outdoor controller board.

Operation LED5/LED6 (Red)

Lit

Normal (Stop)

Normal (Operating)

Fan stops. Controller board is outputting waveform for fan driving.

Contents

Operation

LED5/LED6 (Red)

Importance

2 blinks 1

2 3 4 5

6 blinks

8 blinks

7 blinks

Abnormal is detected

Abnormality of bus voltage: Abnormal if bus voltage inspected for 1.5msec. is less than 60V or more than 390V. Abnormality of overcurrent: Abnormal if current value of DC bus in fan controller board is over the cut-off point. Abnormality of startup failure: Abnormal if the operating speed does not reach 100rpm even 12 sec passed after startup. Abnormality of position detection: Abnormal if the position of U-phase cannot be detected after starting up fan. Abnormality of disconnection: Abnormal if the first pattern of U/V/W-phase position detected after startup is H/H/H or L/L/L.

Meaning of error code and detection method

Remark

These

LEDs

are not

used

for

service.

U2 U7 U1

UF UP UH

P1 P2 P9

P4 P5

Indication Error

Error code

Outdoor controller board

Contents Inspection method

LED1 (Green)

LED2 (Red)

3 blinking 1 blinking

2 blinking

W1 Error code displayed on remote controller W2 Refer to service manual for indoor unit.

4 blinking

5 blinking

6 blinking

7 blinking

1 blinking

2 blinking

3 blinking

4 blinking

Abnormality of shell thermostat and discharging temperature (TH4)

Abnormality of super heat due to low discharge temperature

1Check if stop valves are open. 2Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller board are not

disconnected.

3Check if unit fills with specified amount of refrigerant. 4Measure resistance values among terminals on indoor valve and outdoor linear

expansion valve using a tester.

Abnormal high pressure (High pressure switch 63H worked.)

1Check if indoor/outdoor units have a short cycle on their air ducts. 2Check if connector (63H) on outdoor controller board is not disconnected. 3Check if heat exchanger and filter is not dirty. 4Measure resistance values among terminals on linear expansion valve using a

tester.

1Check if stop valves are open. 2Check looseness, disconnection, and converse connection of compressor wiring. 3Measure resistance values among terminals on compressor using a tester. 4Check if outdoor unit has a short cycle on its air duct.

Compressor over current breaking (Start-up locked) Compressor over current breaking Abnormality of current sensor (P.B.) Abnormality of power module Open/short of discharge thermistor (TH4)

Open/short of outdoor thermistor (TH8)

Open/short of outdoor thermistors (TH3, TH6, TH7 and TH8)

Check if connectors (TH3, TH4, TH6 and TH7) on outdoor controller board and conn-

ector (CN3) on outdoor power board are not disconnected.

Measure resistance value of outdoor thermistors.

Abnormality of radiator panel temperature

1Check if indoor/outdoor units have a short cycle on their air ducts. 2Measure resistance value of outdoor thermistor(TH8).

Abnormality of voltage 1Check looseness, disconnection, and converse connection of compressor wiring.

2Measure resistance value among terminals on compressor using a tester. 3Check the continuity of contactor (52C). 4Check if power supply voltage decreases. 5Check the wiring of CN52C. 6Check the wiring of CNAF. (RP4~6VHA only)

Abnormality of room temperature thermistor (TH1) Abnormality of pipe temperature thermistor /Liquid (TH2) Abnormality of pipe temperature thermistor/Condenser-Evaporator

1Check if connectors (CN20, CN21 and CN29) on indoor controller board are not disconnected. 2Measure resistance value of indoor thermistors.

Abnormality of drain sensor (DS)

Indoor drain overflow protection

1Check if connector (CN31) on indoor controller board is not disconnected. 2Measure resistance value of indoor thermistors. 3Measure resistance value among terminals on drain-up machine using a tester. 4Check if drain-up machine works. 5Check drain function.

Freezing (cooling)/overheating (heating) protection

1Check if indoor unit has a short cycle on its air duct. 2Check if heat exchanger and filter is not dirty. 3Measure resistance value on indoor and outdoor fan motors. 4Check if the inside of refrigerant piping is not clogged.

Abnormality of pipe temperature

1Check if indoor thermistors (TH2 and TH5) are not disconnected from holder. 2Check if stop valve is open. 3Check converse connection of extension pipe. (on plural units connection) 4Check if indoor/outdoor connecting wire is connected correctly. (on plural units

connection)

W3 LED1 on power board for RP4, RP5 and RP6 1 blink: Power is supplied. 3 blinks:

Power is supplied to warm up compressor.

2 blinks: Power is supplied to compressor. Blinking: Limited control is being performed.

P.34 P.35 P.34

P.36 P.36 P.36 P.35 P.35 P.35

P.35 P.36

W2 W2 W2

Detailed

reference

page

LED indications of fan operating condition (LED5 and LED6 on controller board)

1ON23456

1 second

interval

Display Operation Model

The tens digit : Operation mode

The ones digit : Relay output

O C H

Display

0 1 2 3 4 5 6 7 8

Compressor

Warming-up Compressor

4-way valve

Solenoid valve

— — —

— ON ON ON ON

—

— — — — — — —

— ON ON

—

— ON ON

—

— ON ON

— ON

—

— —

OFF / FAN

COOLING / DRY w

HEATING

DEFROSTING

Display

Contents to be inspected (When power is turned on) F3 F5 F9 E8 E9

Eb Ec

E0~E7

63L connector(red) is open. 63H connector(yellow) is open. 2 connectors (63H/63L) are open. Indoor/outdoor communication error (Signal receiving error) (Outdoor unit) Indoor/outdoor communication error (Transmitting error) (Outdoor unit) Mis-wiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more) Mis-wiring of indoor/outdoor unit connecting wire(converse wiring or disconnection) Startup time over Communication error except for outdoor unit

Display

Inspection unit 0 1 2 3

Outdoor unit

Indoor unit 1

Indoor unit 2

Indoor unit 3

Display

Contents to be inspected (During operation) U1 U2 U3 U4 U5 U6 U7 UF

UP P1~P8 A0~A7

Abnormal high pressure (63H worked) Abnormal high discharging temperature, shortage of refrigerant Open/short circuit of discharging thermistor(TH4) Open/short of outdoor unit thermistors(TH3, TH6, TH7 and TH8) Abnormal temperature of heat sink Abnormality of power module Abnormality of super heat due to low discharge temperature Compressor overcurrent interruption (When Comp. locked) Current sensor error Abnormal low pressure (63L worked) Compressor overcurrent interruption Abnormality of indoor units Communication error of high-prior signal (M-NET)

[When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)]

Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on ‘A-Control Service Tool’.

Operation indicator SW2 : Indicator change of self diagnosis

SW2 setting

Display detail

Explanation for display Unit

(Be sure the 1 to 6 in the SW2 are set to OFF.) (1) Display when the power supply ON.

When the power supply ON, blinking displays by turns. Wait for 4 minutes at the longest.

(2) When the display lights. (Normal operation)

1Operation mode display.

(Lighting)

LED1

wC5 is displayed during replacement

operation. <except RP3VHA>

2Display during error postponement

Postponement code is displayed when compressor stops due to the work of protection device. Postponement code is displayed while error is being postponed.

(3) When the display blinks

Inspection code is displayed when compressor stops due to the work of protection devices.

SW2

(Initial setting)

SW2 setting

1ON23456

1ON23456 1ON23456

1ON23456

Display detail

Pipe temperature / Liquid(TH3) – 40~90

Explanation for display Unit

– 40~90 (When the coil thermistor detects 0: or below, “–”

and temperature are displayed by turns.)

(Example) When -10:;

0.5 secs. 0.5secs. 2 secs.

Discharge temperature (TH4) 3~217

Output step of outdoor FAN 0~10

The number of ON / OFF times of compressor 0~9999

Compressor integrating operation times 0~9999

Compressor operating current. 0~50

3~217 (When the discharge thermistor detects 100: or

more, hundreds digit, tens digit and ones digit are displayed by turns.)

(Example) When 105:;

0.5 secs. 0.5secs. 2 secs.

0~10

0~9999 (When the number of times is 100 or more,

hundreds digit, tens digit and ones digit are displayed by turns.)

(Example) When 42500 times (425 ✕100 times);

0.5 secs. 0.5secs. 2 secs.

0~9999 (When it is 100 hours or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 2450 hours (245 ✕10 hours);

0.5 secs. 0.5secs. 2 secs.

0~50 wOmit the figures after the decimal fractions.

Step

100 times

10 hours

Compressor operating frequency 0~225

0~255 (When it is 100Hz or more, hundreds digit, tens

digit and ones digit are displayed by turns.

(Example) When 125Hz;

0.5 secs. 0.5secs. 2 secs.

LEV-Aopening pulse 0~480

0~480 (When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.

(Example) When 150 pulse;

0.5 secs. 0.5secs. 2 secs.

Error postponement code history (1) of outdoor unit

Postponement code display Blinking: During postponement Lighting: Cancellation of postponement “00” is displayed in case of no postponement.

Operation mode on error occurring Operation mode of when operation stops due to

error is displayed by setting SW2 like below.

(SW2)

Pulse

Code

display

Code

display

SW2 setting

1ON23456

1ON23456 1ON23456

1ON23456

1302

Display detail

Pipe temperature / Liquid(TH3) on error occurring – 40~90

Explanation for display Unit

– 40~90 (When the coil thermistor detects 0: or below, “–”

and temperature are displayed by turns.)

(Example) When –15:;

0.5 secs. 0.5secs. 2 secs.

Compressor temperature (TH4) or discharge temperature (TH4) on error occurring 3~217

Compressor operating current on error occurring 0~20

Error code history (1) (latest) Alternate display of abnormal unit number and code

Error code history (2) Alternate display of error unit number and code

3~217 (When the temperature is 100: or more, the

hundreds digit, tens digit and ones digit are displayed by turns.)

(Example) When 130:;

0.5 secs. 0.5secs. 2 secs.

0~20

When no error history, “ 0 ” and “– –” are displayed by turns.

Code

display

Code

display

Thermostat ON time 0~999

Test run elapsed time 0~120

0~999 (When it is 100 minutes or more, the hundreds digit,

tens digit and ones digit are displayed by turns.)

(Example) When 245 minutes;

0.5 secs. 0.5secs. 2 secs.

0~120 (When it is 100 minutes or more, the hundreds digit,

tens digit and ones digit are displayed by turns.)

(Example) When 105 minutes;

0.5 secs. 0.5secs. 2 secs.

Minute

SW2 setting

1ON23456

Capacity

RP1.6V RP2V RP2.5V RP3V

Code

Capacity

RP4V RP5V RP6V

Code

20 25 28

Setting details

• The tens digit (Total display for applied setting)

• The ones digit

H·P /

Cooling only

Single phase / Three phase

Display details

0 : H·P 1 : Cooling only 0 :

Single phase

2 :

Three phase

Setting details

Defrosting switch

Display details

0 : Normal 1 : For high humidity

1ON23456

Display detail

The number of connected indoor units

Explanation for display

0~3 (The number of connected indoor units are displayed.)

Unit

Capacity setting display

Outdoor unit setting information

Indoor pipe temperature / Liquid (TH2(1)) Indoor 1 – 39~88

Displayed as an outdoor capacity code.

(Example) When heat pump,three phase and

defrosting (normal) are set up, “20” is displayed.

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

Code

display

Code

display

Indoor pipe temperature / Cond. / Eva. (TH5(1)) Indoor 1 – 39~88

Indoor pipe temperature / Liquid (TH2(2)) Indoor 2 – 39~88

Indoor pipe temperature / Cond. / Eva. (TH5(2)) Indoor 2 – 39~88

Indoor room temperature (TH1) 8~39

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

8~39

1ON23456

SW2 setting

1ON23456

Display detail

Indoor setting temperature 17~30

Explanation for display Unit

17~30

1ON23456

Outdoor pipe temperature / Cond./ Eva. (TH6)

-39~88

Outdoor outside temperature (TH7)

-39~88

Outdoor heat sink temperature (TH8)

-40~200

Discharge super heat. SHd 0~255

Cooling = TH4-TH6 Heating = TH4-TH5

Sub cool. SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH4

-39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

-39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

-40~200 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

(When the thermistor detects 100: or more,

hundreds digit, tens digit and ones digit are displayed by turns.)

0~255 (When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

0~130 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.)

°C

Input current of outdoor unit

LEV-B opening pulse

Targeted operation frequency 0~255

DC bus voltage 180~370

0~500 (When it is 100 or more, hundreds digit, tens digit

and ones digit are displayed by turns.)

0~480 (When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

0~255 (When it is 100Hz or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

180~370 (When it is 100V or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

0.1 A

Pulse

SW2 setting

1ON23456

Display detail

Capacity save 0~255 When air conditioner is connected to M-NET and capacity save mode is demanded, “0”~”100” is displayed.

When there is no setting of capacity save “100” is displayed.

Error postponement code history (2) of outdoor unit

Explanation for display Unit

0~100 (When the capacity is 100% hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 100%;

0.5 secs. 0.5secs. 2 secs.

Postponement code display Blinking: During postponement Lighting: Cancellation of postponement “00” is displayed in case of no postponement.

Code

display

Error postponement code history (3) of outdoor unit

Error code history (3) (Oldest) Alternate display of abnormal unit number and code.

Error thermistor display

When there is no error thermistor, “–“ is displayed.

Operation frequency on error occurring 0~255

Postponement code display Blinking: During postponement Lighting: Cancellation of postponement “00” is displayed in case of no postponement.

When no error history, “0” and “– –“ are displayed by turns.

3: Outdoor pipe temperature /Liquid (TH3) 6: Outdoor pipe temperature /Cond./Eva. (TH6) 7: Outdoor outside temperature (TH7) 8: Outdoor radiator panel (TH8)

0~255 (When it is 100Hz or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 125Hz;

0.5 secs. 0.5secs. 2 secs.

Code

display

Code

display

Code

display

Fan step on error occurring 0~10

0~10

Step

SW2 setting

1ON23456

Display detail

LEV-Aopening pulse on error occurring 0~480

Explanation for display Unit

0~480 (When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 130 pulse;

0.5 secs. 0.5secs. 2 secs.

Pulse

Indoor room temperature (TH1) on error occurring 8~39

Indoor pipe temperature / Liquid (TH2) on error occurring

-39~88

Indoor pipe temperature / Cond./ Eva. (TH5) on error occurring

-39~88

Outdoor pipe temperature / Cond./ Eva. (TH6) on error occurring

-39~88

8~39

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

Outdoor outside temperature (TH7) on error occurring

-39~88

Outdoor heat sink temperature (TH8) on error occurring

-40~200

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-40~200 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

SW2 setting

1ON23456

Normal Overvoltage error Undervoltage error T phase interruption error Abnormal power synchronous signal PFC error (Overvoltage / Undervoltage / Overcurrent)

W Display examples for multiple errors: Overvoltage (01) + Undervoltage (02) = 03 Undervoltage (02) + Power-sync signal error (08) = 0A T phase interruption (04) + PFC error (10) = 14

Power circuit board Controller circuit board Controller circuit board Power circuit board

Power circuit board

—

Description Detection point Display

00 01 02 04 08

Display detail

Discharge super heat on error occurring SHd 0~255

Cooling = TH4-TH6 Heating = TH4-Th5

Explanation for display Unit

0~255 (When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

(Example) When 150°C;

0.5 secs. 0.5secs. 2 secs.

Sub cool on error occurring. SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH2

Thermostat-on time until error stops 0~999

Indoor pipe temperature / Liquid (TH2 (3)) Indoor 3

-39~88

Indoor pipe temperature / Cond./ Eva. (TH5 (3)) Indoor 3

-39~88

0~130 (When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

(Example) When 115°C;

0.5 secs. 0.5secs. 2 secs.

0~999 (When it is 100 minutes or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 415 minutes;

0.5 secs. 0.5secs. 2 secs.

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

When there is no indoor unit, “00” is displayed.

Minute

Replacement operation

WIf replacement operation is conducted

even once, “1” is displayed. If replacement operation time is less than 2 hrs. “0” is displayed.

U9 Error status during the Error postponement period

1: Conducted. 0: Not yet.

–

Code

display

Function

Settings

Mode No.

Setting No.

Remarks

Filter sign

Fan speed

No. of air outlets

Installed options (highperformance filter) Horizontal vane setting

Energy saving air flow (Heating mode) Direct add-on type humidifier (Only for power-cassette) Swing

Set temperature in heating mode 4deg-up

Fan speed when the heating thermostat is OFF

Quiet operation mode of power cassette Fan speed when the

cooling thermostat is OFF Detection of abnormality

of the pipe temperature (P8)

100Hr 2500Hr No filter sign indicator standard High ceiling 1 High ceiling 2 4 directions 3 directions 2 directions Not supported Supported No vanes Equipped with vane (No.1 setting) Equipped with vane (No.2 setting) Disabled Enabled Not supported Supported

Not available Available Available Not available Extra low Low (4-speed model) Low (2-speed model) Set fan speed Normal Quiet Set fan speed Stop Available Not available

1 2 3 1 2 3 1 2 3 1 2 1 2 3 1 2 1

2 1

2 1 2 3 1 2 1 2 1 2 1 2

— — — — — — — — — — — — — —

— —

—

— —

23 24

26 27 28

4-way Cassette PLA-AA

(powercassette)

PLA-AA.UK (powercassette)

Ceiling concealed

Initial setting

(when sent from the factory)

–: Not available

PEAD-EA PEAD-GA

— — — — — — — — — — — — — —

—

— —

Ceiling Concealed

Wall Mounted

— — — — — — — — — — — — — —

—

— —

PKA-FAL PKA-GAL

— — —

— —

Ceiling Suspended

PCA-GA

Function

Settings

Mode No.

Setting No.

Initial setting

(when sent from the factory)

Remarks

Power failure

automatic recovery

Indoor temperature

detecting

LOSSNAY

connectivity

Power supply

voltage

Auto operating

mode

Frost prevention

temperature

Humidifier control

Change of

defrosting control

OFF ON Operating indoor units (The average is considered as indoor temperature.) Indoor unit with remote controller Remote controller's internal sensor Not supported Supported (indoor unit not equipped with outdoor air intake) Supported (indoor unit equipped with outdoor air intake) 240V 220V,230V Auto energy-saving operation ON Auto energy-saving operation OFF 2: (Normal) 3: When the compressor operates, the humidifier also operates. When the fan operates, the humidifier also operates. Standard For high humidity

1 2

3 1 2 3 1 2 1 2 1 2 1 2 1 2

04 05 15 16 17

The setting is applied to all the units in the same refrigerant system.

11-11. SELECTING FUNCTIONS USING THE REMOTE CONTROLLER

Each function can be set according to necessity using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1.

<Table 1> Function selections

(1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number

on Page 67.)

W1 The functions below are available only when the wired remote controller is used.The functions are not available for floor

standing models.

(2) Functions available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller)

• When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the indoor unit number on Page 67.

• When setting functions for a simultaneous- Twin Triple indoor unit system, set the unit number to 01 to 03 for each indoor

unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number on Page 67.

• When setting the same functions for an entire simultaneous Twin Triple-indoor unit system, set refrigerant address to AL

(07 in case of wireless remote controller) referring to 4 setting the indoor unit number on Page 67.

11-11-1. Selecting functions using the wired remote controller

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

F E

123

[Flow of function selection procedure] The flow of function selection procedure is shown below. The flow is described in case of setting indoor temperature detecting shown in table 1 on the preceding page. Refer to procedure 1 to 0 when actually setting functions.

Selecting functions using the wired remote controller

1 Check the function selection setting. 2 Switch to function setting mode. w

(Press A and B at the same time with the remote controller stopped.)

w For modes 15 and higher,

press J and B at the same time.

3 Specify refrigerant address "00" (outdoor unit) (This operation is not necessary for single refrigerant system.) 4 Specify unit No. "00". (indoor unit)

(Use C and D.)

5 Enter the setting.

(Press E.)

Select mode No "02"

(Specified indoor unit: FAN operation)

Change refrigerant address unit No.

(room temperature detection position).

Select setting No. "03" (remote controller fixed).

(Use

and G.)

8 Enter the setting.

(Press E.)

Finished

YES

Function selection end screen

(Press A and B at the same time.)

Wired type

1 Mode number 2 Setting number 3 Refrigerant address 4 Unit number

YES

For mode 01 to 13, press Aand B at the same time and for mode 15 to 28, press B and J to go to function select mode.

[Operating instructions]

Checking the function settings

If you change the setting in the function setting procedure, the contents of setting will be changed for the designated mode. Change the setting after recording all the previous setting into the checklist of table 1 by following steps 2 to 7. In addition,

read the installation manual packed with indoor units to be informed of initial setting.

Turning off the remote controller

Press the

A FILTER and B TEST RUN buttons simultaneous-

ly and hold them for at least 2 seconds. (For modes 15 and higher, press J and B simultaneously for

Setting the refrigerant address No. of outdoor unit

Press C TIMER SET button to select the refrigerant address from No.00 to No.15. (Set the refrigerant address to

No.00 in case of single refrigerant grouping system.) at least 2 seconds.) FUNCTION will start to flash. After a while, the refrigerant address display will start to flash .

FUNCTION

W If the unit stops two seconds after the FUNCTION display starts to flash or [88] starts to flash in the room temperature display, a transmission problem may have occurred. Check to see if there are some sources of transmission interference (noise) nearby.

If you make a mistake during any points of this procedure, you can quit the function setting by pressing 0 then return to step 2.

FUNCTION

(a)

(c)

(h)

(g)

(b)

(f)

(d) (e)

3 00 refrigerant address

FUNCTION

Setting the indoor unit number

Press D(CLOCK ON OFF) and [--] will start to flash in the unit number display (4) .

Press C (TIMER SET) button to select the unit number from 00, 01, 02, 03, 04, and AL.

FUNCTION

•Set the unit number to 00 if the mode such as power failure automatic recovery, indoor temperature detecting or

LOSSNAY connectivity is desired to be selected.

•Select the unit number from 01 to 04 if the function setting is desired to be done for each of them individually.

•Set the unit number to AL if the function setting is desired to be done for all of units simultaneously.

Confirming the refrigerant address and indoor unit number

Press E MODE button to confirm the refrigerant address and unit number. After a while, [--] will flash in the mode number display (I).

WIf [88] appears in the room temperature display section, the selected refrigerant address does not exist in the system. Also, if [F] appears in the unit number display section, the selected unit number does not exist. Enter the correct refrig-

erant address and unit number at steps 2 and 3.

FUNCTION

Designated indoor unit starts fan draft operation by pressingE MODE button. Check which indoor unit is designated for function setting by doing this. In addition, all the units of the selected refrigerant address start fan draft operation if the unit number is set to 00 or AL.

Example) When the refrigerant address is set to 00 and the

unit number is 02;

(a) Outdoor unit (b) Indoor unit (c) Unit number 01 (d) Unit number 02 (e) Unit number 03 (f) Fan draft (g) Designation (h) Remote controller

WIf any undesignated indoor units start fan draft operation under multiple refrigerant grouping system, refrigerant addresses may be overlapped. Reassign refrigerant addresses at the DIP switch of the outdoor unit.

Selecting the mode number

Press F (TEMP) buttons to set the desired mode number. (It is possible to set the number of available mode only.)

Selecting the setting of designated mode

Press G button, and the setting number will start to flash.

Press F (TEMP) button to select the setting number.

Check the current status of the setting by doing this.

Registering the settings from steps 33to 77into memory

The mode and setting numbers (1)(2) will start to flash when the MODE button E is pressed and registration will begin. The numbers are set when the flashing stays lit.

FUNCTION

WIf [---] appears in the room temperature display as the mode/setting number, or if a flashing [88] display appears, a transmission problem may have occurred. Check to see if there are some sources of transmission interference (noise) nearby.

Registering other settings simultaneously

Repeat steps 3 to 8 to make other function settings.

Completing the function settings Press A FILTER and B TEST RUN buttons simultaneously for at least two seconds. (For modes 15 and higher, press J and B simultaneously for at least 2 seconds.) After a while, the function selection screen will disappear and air conditioner OFF display will appear.

WDo not use the remote controller for 30 seconds after completing the function

setting. (Any requests will be rejected.)

FUNCTION

Note Make sure to check all settings with and etc. on the checklist of table 1 if you have changed the settings of indoor units by this procedure after installation construction.

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

CHECK

RESET

SET

CLOCK

CHECK

min

The flow of the function selection procedure is shown below. This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation . The procedure is given after the flow chart.

1 Check the function selection setting. 2 Switch to function selection mode.

(Enter address "50" in troubleshooting mode, then press the HOUR button.)

Troubleshooting mode is the mode entered when you press the INSPECT button twice to display "INSPECT".

3 Specify unit No. "01" (since the function applies to unit 01).

(Set address "01" while still in troubleshooting mode, then press the MINUTE button.)

Note: You can't specify the refrigerant address. 4

Select mode No. "24" (function that raises set temperature by 4 degrees during HEAT operation). (Set address "24" while still in troubleshooting mode, then press the HOUR button.)

Finished

8 End function selection mode.

(End troubleshooting mode.)

YES

Note: When you switch to function selection mode

on the wireless remote controller's operation area, the unit ends function selection mode automatically if nothing is input for 10 minutes or longer.

5 Select setting No. "02" (OFF).

(Set address "02" while still in troubleshooting mode, then press the HOUR button.)

Change unit No.

YES

11-11-2. Selecting functions using the wireless remote controller (Type C)

min

Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller.

[Flow of function selection procedure]

[Operating instructions]

1 Check the function settings. 2 Press the button twice continuously. → CHECK is lit and “00” blinks.

Press the temp button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

3 Set the unit number.

Press the temp button to set the unit number. (Press “01” to specify the indoor unit whose unit number is 01.) Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

By setting unit number with the button, specified indoor unit starts performing fan operation. Detect which unit is assigned to which number using this function. If unit number is set to AL, all the indoor units in same refrigerant system start performing fan operation simultaneously.

* If a unit number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the unit number

setting.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the unit number

setting.

4 Select a mode.

Press the temp button to set a mode. Press “24” to turn on the function that raises the set temperature by 4 degree during heat operation. Direct the wireless remote controller toward the sensor of the indoor unit and press the button. → The sensor-operation indicator will flash and beeps will be heard to indicate the current setting number. Current setting number: 1 = 1 beep (one second)

2 = 2 beeps (one second each)

* If a mode number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the mode

number.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the mode

number.

5 Select the setting number.

Press the temp button to select the setting number. (02: Not available) Direct the wireless remote controller toward the receiver of the indoor unit and press the button. → The sensor-operation indicator will flash and beeps will be heard to indicate the the setting number.

Setting number: 1 = 2 beeps (0.4 seconds each)

* If a setting number that cannot be recognized by the unit is entered, the setting will turn back to the original setting.

6 Repeat steps 4 and 5 to make an additional setting without changing unit number. 7 Repeat steps 3 to 5 to change unit number and make function settings on it. 8 Complete the function settings

* Do not use the wireless remote controller for 30 seconds after completing the function setting.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the setting number.

Press button.

3 = 3 beeps (one second each)

2 = 2 beeps (0.4 seconds each, repeated twice) 3 = 2 beeps (0.4 seconds each, repeated three times)

12 DISASSEMBLY PROCEDURE

PUHZ-RP1.6VHA PUHZ-RP2VHA

OPERATING PROCEDURE

1. Removing the top panel, service panel, front panel and back panel

(1) Remove the top panel fixing screws (4 ✕ 10), one from the

right and two from the eft side, and detach the top panel.

(2) Remove 1 service panel fixing screw (4 ✕ 10) and detach

the service panel by pulling it downward. (See photo 2.)

(3) Remove the front panel fixing screws (4 ✕ 10), 5 from the

front, 2 from the right and 2 from the left side, and detach the front panel.

(4) Remove the back panel fixing screws (4 ✕ 10), 4 from the

right and 3 from the rear side, and detach the back panel.

Photo 1

Grille

Photo 2

Front panel

PHOTOS

Top panel

Top panel fixing screws

Back panel

Service panel for charge plug

Service panel

Service panel fixing screw

Pull down

2. Removing the fan motor

(1) Remove the top panel. (See photo 1.) (2) Remove the front panel. (See photo 1.) (3) Remove 1 nut (M6, left-screw) and detach the propeller. (4) Disconnect the connectors, FAN11 and FAN12 on the

controller circuit board in the electrical parts box. (5) Loosen the clamp for the lead wire in the motor support. (6) Remove 4 fan motor fixing screws (4 ✕ 18) and detach the

fan motor. (See photo 3.)

Photo 3

Nut

Photo 4

Fan motor (MF1)

Propeller

Fan motor fixing screws

Electrical parts box

4 hooks

Clamp

Motor support

Fan motor fixing screws

OPERATING PROCEDURE PHOTOS

3. Removing the electrical parts box

(1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Disconnect the indoor/outdoor connecting wire from

terminal block.

(5) Remove all the following connectors from controller circuit board;

fan motor, linear expansion valve, thermistor<Outdoor pipe>,

thermistor<Discharge>, thermistor<Outdoor 2-phase pipe>,

thermistor<Outdoor>, high pressure switch, four-way valve and bypass valve. Pull out the disconnected wire from the electrical parts box. <Diagram symbol in the connector housing>

• Fan motor (FAN11 and FAN12)

• Linear expansion valve (LEV-Aand LEV-B)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• High pressure switch (63H)

(6) Remove the terminal cover and disconnect the compressor

lead wire.

(7) Remove the electrical parts box fixing screws, 1 from the

front, the right and the rear side, and detach the electrical parts box by pulling it upward.

Photo 5

Terminal cover

Electrical parts box

Motor for compressor (MC)

Controller circuit board (C.B.)

Terminal

block

(TB1)

Electrical parts box fixing screw

4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) and thermistor <Outdoor pipe> (TH3)

(1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Remove the back panel fixing screws, 4 from the right and

3 from the rear side, and detach the back panel. (See photo 1.)

(5) Disconnect the connector TH3 (white) or TH6/7 (red) on

the controller circuit board in the electrical parts box.

(6) Loosen the clamp for the lead wire in the rear of the

electrical parts box.

(7) Pull out the thermistor <Outdoor pipe> (TH3) and

thermistor <Outdoor 2-phase pipe> (TH6) from the sensor holder.

Note: In case of replacing the thermistor <Outdoor 2-phase pipe>

(TH6), replace it together with the thermistor <Outdoor> (TH7), since they are combined together. Refer to No. 5 below to remove the thermistor <Outdoor> (TH7).

Photo 6

Electrical parts box

Thermistor <Outdoor 2-phase pipe> (TH6)

Clamp

Thermistor <Outdoor 2-phase pipe> (TH6)

OPERATING PROCEDURE PHOTOS

5. Removing the thermistor <Outdoor> (TH7)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit

board in the electrical parts box.

(4) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(5) Pull out the thermistor <Outdoor> (TH7) from the sensor

holder.

Note: In case of replacing thermistor <Outdoor> (TH7), replace

it together with thermistor <Outdoor 2-phase pipe> (TH6), since they are combined together. Refer to No.4 above to remove thermistor <Outdoor 2-phase pipe>.

6. Removing the thermistor <Discharge> (TH4)

holder. (See photo 8.)

w When attaching the thermistor <Discharge> (TH4), place it

to its original position.

Photo 7

Photo 8

Electrical parts box

Sensor holder

Thermistor <Outdoor> (TH7)

Thermistor <Discharge> (TH4)

7. Removing the solenoid valve coil <Four-way valve> (21S4) and linear expansion valve coil (LEV (A), LEV (B))

[Removing the solenoid valve coil <Four-way valve> (21S4)] (6) Remove 1 solenoid valve coil <Four-way valve> fixing

screw (M4 ✕ 6).

(7) Remove the solenoid valve coil <Four-way valve> by

sliding the coil to the right.

[Removing the linear expansion valve coil (LEV (A), LEV (B)) ] (6) Remove the linear expansion valve coil by sliding the coil

upward.

Photo 9

Linear expansion valve coil (LEV B)

Linear expansion valve

Linear expansion valve coil (LEV A)

solenoid valve coil <Four-way valve> (21S4)

Four-way valve

solenoid valve coil <Four-way valve> fixing screw

OPERATING PROCEDURE PHOTOS

8. Removing the four-way valve

(See photo 8.) (7) Collect the refrigerant. (8) Remove the welded part of four-way valve. Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the four-way valve, cover it with a we

cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

9. Removing linear expansion valve

(1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Remove the back panel. (See photo 1.) (5) Remove the electrical parts box. (See photo 5.) (6) Remove the linear expansion valve coil . (See photo 8.) (7) Collect the refrigerant. (8) Remove the welded part of linear expansion valve. Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the back panel.

Note 3: When installing the linear expansion valve, cover it

with a wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

Photo 10

Linear expansion valve coil (LEV B)

Linear expansion valve

Linear expansion valve coil (LEV A)

solenoid valve coil <Four-way valve> (21S4)

Four-way valve

solenoid valve coil <Four-way valve> fixing screw

10. Removing the high pressure switch (63H)

(1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Remove the back panel. (See photo 1.) (5) Remove the electrical parts box. (See photo 5.) (6) Pull out the lead wire of high pressure switch. (7) Collect the refrigerant. (8) Remove the welded part of high pressure switch.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the back panel.

Note 3: When installing the high pressure switch, cover it with

a wet cloth to prevent it from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized.

11. Removing the reactor (ACL)

(1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Remove the back panel. (See photo 1.) (5) Remove 3 reactor fixing screws (4 ✕ 20) and remove the

reactor.

w The reactor is attached to the rear of the electrical parts box.

Photo 11

High pressure switch (63H)

Charge plug

Photo 12

Reactor fixing screw

Reactor (ACL)

Electrical

parts box

Reactor fixing screws

OPERATING PROCEDURE PHOTOS

12. Removing the motor for compressor (MC)

the separator. (7) Collect the refrigerant. (8) Remove 3 compressor fixing nuts by using a spanner or a

monkey wrench.

(9) Remove the welded pipe of motor for compressor inlet

and outlet.

Note: Collect refrigerant without spreading it in the air.

Photo 13

Motor for compressor (MC)

Separator

Separator fixing screw

Power receiver

Valve bed

Compressor fixing nut

13. Removing the power receiver

(1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Remove the back panel. (See photo 1.) (5) Remove the electrical parts box. (See photo 5.) (6) Collect the refrigerant. (7) Remove 4 welded pipes of power receiver inlet and outlet. (8) Remove 2 receiver leg fixing screws (4 ✕ 10). (9) Remove the power receiver together with the receiver leg.

Note: Collect refrigerant without spreading it in the air.

Photo 14

Outlet

Receiver leg fixing screw

Inlet

Power receiver

Receiver leg

PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

OPERATING PROCEDURE

1. Removing the service panel and top panel

(1) Remove 3 service panel fixing screws (5 ✕ 10) and slide

the hook on the right downward to remove the service panel.

(2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top

panel and remove it.

2. Removing the fan motor (MF1)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 5 fan grille fixing screws (5 ✕ 10) to detach the

fan grille. (See figure 1.)

(4) Remove a nut (for right handed screw of M6) to detach

the propeller. (See photo 1.)

(5) Disconnect the connectors, FAN11 and FAN12, on

controller circuit board in electrical parts box.

(6) Remove 4 fan motor fixing screws (5 ✕ 25) to detach the

fan motor. (See photo 2.)

Figure 1

Fan grille

Photo 1

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Slide

Grill fixing screws

Front panel

Propeller

Photo 2

Fan motor fixing screws

Top panel

Service panel

Service panel fixing screws

Fan motor (MF1)

3. Removing the electrical parts box

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the indoor/outdoor connecting wire from

terminal block.

(4) Remove all the following connectors from controller circuit board;

fan motor, linear expansion valve, thermistor<Outdoor pipe>,

thermistor<Discharge>, thermistor<Outdoor 2-phase pipe>,

thermistor<Outdoor>, thermistor<Heat sink>,

high pressure switch, four-way valve and bypass valve. Then remove a screw (4 ✕ 8) from the valve bad to remove the lead wire. Pull out the disconnected wire from the electrical parts box. <Diagram symbol in the connector housing>

• Fan motor (FAN11 and FAN12)

• Linear expansion valve (LEV-Aand LEV-B)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• Thermistor <Heat sink> (CN3)

• High pressure switch (63H)

• Solenoid valve coil <Four-way valve> (21S4)

• Solenoid valve coil <Bypass valve> (SV2)

(5) Remove the terminal cover and disconnect the compressor

lead wire.

(6) Remove an electrical parts box fixing screw (4 ✕ 10) and

detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.

Front panel fixing screws

Photo 3

Valve bed

Screw

Cover panel fixing screws

Fan motor fixing screws

Electrical parts box

Controller circuit board (C.B.)

Electrical parts box fixing screw

Terminal block (TB1)

Terminal cover

Motor for compressor (MC)

Cover panel (Front)

OPERATING PROCEDURE PHOTOS

4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connectors, TH6 and TH7 (red), on the

controller circuit board in the electrical parts box.

(4) Loosen the clamp for the lead wire in the rear of the

electrical parts box.

(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)

from the sensor holder.

Note: In case of replacing thermistor <Outdoor 2-phase pipe>

(TH6), replace it together with thermistor <Outdoor> (TH7), since they are combined together. Refer to No.5 below to remove thermistor <Outdoor>.

5. Removing the thermistor <Outdoor> (TH7)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit

board in the electrical parts box.

(4) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(5) Pull out the thermistor <Outdoor> (TH7) from the sensor

holder.

Photo 4

Controller circuit board (C.B.)

Photo 5

Electrical parts box

Thermistor <Outdoor 2-phase pipe> (TH6)

Clamp

Note: In case of replacing thermistor <Outdoor> (TH7), replace

it together with thermistor <Outdoor 2-phase pipe> (TH6), since they are combined together. Refer to No.4 above to remove thermistor <Outdoor 2-phase pipe>.

6. Removing the thermistor <Outdoor pipe> (TH3) and thermistor <Discharge> (TH4)

(1) Remove the service panel. (See figure 1.) (2) Disconnect the connectors, TH3 (white) and TH4 (white),

on the controller circuit board in the electrical parts box.

(3) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(4) Pull out the thermistor <Outdoor pipe> (TH3) and

thermistor <Discharge> (TH4) from the sensor holder.

Thermistor <Outdoor> (TH7)

Photo 6

Sensor holder

Thermistor <Discharge> (TH4)

Thermistor <Outdoor pipe> (TH3)

OPERATING PROCEDURE

PHOTOS

7. Removing the solenoid valve coil <Four-way valve> (21S4), linear expansion valve coil (LEV(A), LEV(B)) and solenoid valve coil <Bypass valve> (SV)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.)

[Removing the solenoid valve coil <Four-way valve>]

(4) Remove solenoid valve coil <Four-way valve> fixing screw

(M4 ✕ 6).

(5) Remove the solenoid valve coil <Four-way valve> by

sliding the coil toward you.

(6) Disconnect the connector 21S4 (green) on the controller

board in the electrical parts box.

[Removing the linear expansion valve coil]

(4) Remove the linear expansion valve coil by sliding the coil upward. (5) Disconnect the connectors, LEV A(white) and LEV B (red),

on the controller circuit board in the electrical parts box.

[Removing the solenoid valve coil <Bypass valve>]

(4) Remove the solenoid valve coil <Bypass valve> fixing screw

(M4 ✕ 6).

(5) Remove the solenoid valve coil <Bypass valve> by sliding the

coil upward.

(6) Disconnect the connector SV2 (blue) on the controller

circuit board in the electrical parts box.

8. Removing the four-way valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(5) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel.

(6) Remove the solenoid valve coil <Four-way valve>.

(See photo 7.) (7) Collect the refrigerant. (8) Remove the welded part of four-way valve. Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the four-way valve, cover it with a wet cloth

to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

9. Removing the linear expansion valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then

remove the valve bed. (5) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (6) Remove the linear expansion valve. (See photo 7.) (7) Collect the refrigerant. (8) Remove the welded part of linear expansion valve. Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the linear expansion valve, cover it

with a wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

Photo 7

Linear expansion valve coil (LEV B)

Solenoid valve coil <Bypass valve> fixing screw

Solenoid valve coil <Bypass valve> (SV)

Photo 8

Solenoid valve coil <Bypass valve> (SV)

Bypass valve

Linear expansion valve

Charge plug (High pressure)

Linear expansion valve coil (LEV B)

solenoid valve coil <Four-way valve> (21S4)

Linear expansion valve coil (LEV A)

Four-way valve

solenoid valve coil <Four-way valve> fixing screw

solenoid valve coil <Four-way valve> (21S4)

Linear expansion valve coil (LEV A)

Linear expansion valve

Four-way valve

Stop valve

Charge plug (Low pressure)

OPERATING PROCEDURE

PHOTOS

10. Removing the bypass valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 right side panel fixing screws (5 ✕ 10) in the

rear of the unit and remove the right side panel. (5) Remove the bypass valve solenoid coil. (See photo 7.). (6) Collect the refrigerant. (7) Remove the welded part of bypass valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

11. Removing the high pressure switch (63H)

rear of the unit and remove the right side panel. (5) Pull out the lead wire of high pressure switch. (6) Collect the refrigerant. (7) Remove the welded part of high pressure switch.

Photo 9

Solenoid valve coil <Bypass valve> (SV)

Bypass valve

Linear expansion valve

Solenoid valve coil <Four-way valve> (21S4)

Photo 10

Lead wire of high pressure switch

Linear expansion valve coil (LEV B)

High pressure switch (63H)

Linear expansion valve coil (LEV A)

Linear expansion valve

Four-way valve

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the high pressure switch, cover it with

a wet cloth to prevent it from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized.

12. Removing the reactor (ACL)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 reactor fixing screws (4 ✕ 16) and remove the

reactor.

w The reactor is attached to the rear of the electrical parts box.

Photo 11

Reactor fixing screw

Reactor (ACL)

Reactor fixing screws

Electrical parts box

OPERATING PROCEDURE

PHOTOS

13. Removing the motor for compressor (MC)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the rear

of the unit and then remove the right side panel. (8) Remove 3 separator fixing screws (4 ✕ 10) and remove

the separator. (9) Collect the refrigerant. (10) Remove the 3 points of the motor for compressor fixing

nut using a spanner or a monkey wrench.

(11) Remove the welded pipe of motor for compressor inlet

and outlet and then remove the compressor.

Note: Collect refrigerant without spreading it in the air.

Photo 12

Valve bed

Motor for compressor (MC)

Separator

fixing screw

Valve bed fixing screws

Power receiver

Compressor

fixing nut

14. Removing the power receiver

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (8) Collect the refrigerant. (9) Remove 4 welded pipes of power receiver inlet and outlet. (10) Remove 2 receiver leg fixing screws (4 ✕ 10).

Note: Collect refrigerant without spreading it in the air.

Photo 13

Inlet

Outlet

Power receiver

Receiver leg

Receiver leg fixing screws

PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA

OPERATING PROCEDURE

1. Removing the service panel and top panel

(1) Remove 3 service panel fixing screws (5 ✕ 10) and slide

the hook on the right downward to remove the service panel.

(2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top

panel and remove it.

2. Removing the fan motor (MF1, MF2)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 5 fan grille fixing screws (5 ✕ 10) to detach the

fan grille. (See figure 1.)

(4) Remove a nut (for right handed screw of M6) to detach

the propeller. (See photo 1.)

(5) Disconnect the connectors, FAN11, FAN12, FAN21 and

FAN 22 on controller circuit board in electrical parts box.

(6) Remove 4 fan motor fixing screws (5 ✕ 25) to detach the

fan motor. (See photo 2.)

Figure 1

Grille fixing screws

Photo 1

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Slide

Front panel

Propeller

Photo 2

Fan motor fixing screws

Top panel

Service panel

Fan grille

Service panel fixing screws

Fan motor

3. Removing the electrical parts box

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the indoor/outdoor connecting wire from

terminal block.

(4) Remove all the following connectors from controller circuit board;

fan motor, linear expansion valve, thermistor <Outdoor pipe>, thermistor <Discharge>, thermistor <Outdoor 2-phase pipe>, thermistor <Outdoor>, thermistor <Heat sink>, high pressure switch, low pressure switch, solenoid valve coil <Four-way valve> and solenoid valve coil <Bypass valve>. Then remove a screw (4 ✕ 8) from the valve bad to remove the lead wire. Pull out the disconnected wire from the electrical parts box.

• Fan motor (FAN11, FAN12, FAN21 and FAN22)

• Linear expansion valve (LEV-Aand LEV-B)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• Thermistor <Heat sink> (CN3)

• High pressure switch (63H)

• Low pressure switch (63L)

• Solenoid valve coil <Four-way valve> (21S4)

• Solenoid valve coil <Bypass valve> (SV2)

(5) Remove the terminal cover and disconnect the

compressor lead wire.

(6) Remove an electrical parts box fixing screw (4 ✕ 10) and

detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.

Photo 3

Screw

Fan motor fixing screws

Controller circuit board (C.B.)

Electrical parts box

Electrical parts box fixing screw

Terminal block (TB1)

Valve bed

Motor for compressor (MC)

Terminal cover

Cover panel (Front)

Cover panel fixing screws

OPERATING PROCEDURE PHOTOS

4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connectors, TH6 and TH7 (red), on the

controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the

electrical parts box.

(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)

from the sensor holder. Note: In case of replacing thermistor <Outdoor 2-phase pipe>

(TH6), replace it together with thermistor <Outdoor> (TH7) since they are combined together. Refer to No.5 below to remove thermistor <Outdoor>.

5. Removing the thermistor <Outdoor> (TH7)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit

board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.) (5) Pull out the thermistor <Outdoor> (TH7) from the sensor

holder.

Photo 4

Controller circuit board (C.B.)

Photo 5

Electrical parts box

Thermistor <Outdoor 2-phase pipe>

(TH6)

Clamp

Note: In case of replacing thermistor <Outdoor> (TH7),

replace it together with thermistor <Outdoor 2-phase pipe> (TH6), since they are combined together. Refer to No.4 above to remove thermistor <Outdoor 2-phase pipe>.

6. Removing the thermistor <Outdoor pipe> (TH3) and thermistor <Discharge> (TH4)

(1) Remove the service panel. (See figure 1.) (2) Disconnect the connectors, TH3 (white) and TH4 (white),

on the controller circuit board in the electrical parts box.

(3) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(4) Pull out the thermistor <Outdoor pipe> (TH3) and

thermistor <Discharge> (TH4) from the sensor holder.

Thermistor <Outdoor>

(TH7)

Photo 6

Sensor holder

Thermistor <Discharge>

(TH4)

Thermistor <Outdoor pipe>

(TH3)

OPERATING PROCEDURE

PHOTOS

7. Removing the solenoid valve coil <Four-way valve> (21S4), and linear expansion valve coil (LEV(A), LEV(B))

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.)

[Removing the solenoid valve coil <Four-way valve>]

(3) Remove four-way valve solenoid coil fixing screw

(M4 ✕ 6).

(4) Remove the solenoid valve coil <Four-way valve> by

sliding the coil toward you.

(5) Disconnect the connector 21S4 (green) on the controller

circuit board in the electrical parts box.

[Removing the linear expansion valve coil]

(3) Remove the linear expansion valve coil by sliding the coil

upward.

(4) Disconnect the connectors, LEV A(white) and LEV B (red),

on the controller circuit board in the electrical parts box.

8. Removing the four-way valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(4) Remove 4 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel.

(5) Remove the solenoid valve coil <Four-way valve>.

(See photo 7.) (6) Collect the refrigerant. (7) Remove the welded part of four-way valve. Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the four-way valve, cover it with a wet

cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

9. Removing linear expansion valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then

remove the valve bed. (4) Remove 4 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (5) Remove the linear expansion valve. (See photo 7.) (6) Collect the refrigerant. (7) Remove the welded part of linear expansion valve. Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the linear expansion valve, cover it

with a wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

Photo 7

Linear expansion valve coil (LEV B)

Photo 8

Linear expansion valve coil (LEV B)

Linear

expansion

valve

Linear expansion valve coil (LEV A)

Charge plug (High pressure)

Solenoid valve coil <Four-way valve> fixing screw

Four-way valve

Solenoid valve coil <Bypass valve> (SV)

Solenoid valve coil <Four-way valve> (21S4)

Linear expansion valve coil (LEV A)

Linear expansion valve

Four-way valve

Charge plug (Low pressure)

OPERATING PROCEDURE

PHOTOS

10. Removing solenoid valve coil <Bypass valve> (SV) and bypass valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 ✕ 10) in the

rear of the unit and remove the right side panel.

(4) Remove the bypass valve solenoid coil fixing screw

(M4 ✕ 6).

(5) Remove the solenoid valve coil <Bypass valve> by

sliding the coil upward.

(6) Disconnect the connector SV2 (blue) on the controller

circuit board in the electrical parts box. (7) Collect the refrigerant. (8) Remove the welded part of bypass valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

11. Removing the high pressure switch (63H) and low pressure switch (63L)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 ✕ 10) in the

rear of the unit and remove the right side panel.

(4) Pull out the lead wire of high pressure switch and low

pressure switch. (5) Collect the refrigerant. (6) Remove the welded part of high pressure switch and low

pressure switch.

Photo 9

Photo 10

Low pressure switch (63L)

Solenoid valve coil <Bypass valve> fixing screw

Solenoid valve coil <Bypass valve> (SV)

Bypass valve

High pressure switch (63H)

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the high pressure switch, cover it with

a wet cloth to prevent it from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized.

12. Removing the reactor (DCL1, DCL2) and capacitor (CE)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) <Removing the reactor> (4) Remove 8 reactor fixing screws (4 ✕ 10) and remove the

reactor. <Removing the capacitor> (4) Remove 2 capacitor band fixing screws (4 ✕ 10) and

remove the capacitor.

w The reactor and capacitor is attached to the rear of the

electrical parts box.

Photo 11

Reactor fixing screws

Reactor (DCL1, DCL2)

Four-way valve

Electrical parts box

Reactor fixing screws

Capacitor (CE)

Capacitor band fixing screws

OPERATING PROCEDURE

PHOTOS

13. Removing the motor for compressor (MC)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the

valve bed. (7) Remove 3 right side panel fixing screw (5 ✕ 10) in the rear

of the unit and then remove the right side panel. (8) Remove 3 separator fixing screws (4 ✕ 10) and remove

the separator. (9) Collect the refrigerant. (10) Remove the 3 points of the motor for compressor fixing

nut using a spanner or a monkey wrench.

(11) Remove the welded pipe of motor for compressor inlet

and outlet and then remove the compressor.

Note: Collect refrigerant without spreading it in the air.

Photo 12

Power receiver

Valve bed

Valve bed fixing screws

Separator

Motor for compressor (MC)

Separator fixing screw

Compressor

fixing nut

14. Removing the power receiver

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (7) Collect the refrigerant. (8) Remove 4 welded pipes of power receiver inlet and outlet. (9) Remove 2 receiver leg fixing screws (4 ✕ 10).

Note: Collect refrigerant without spreading it in the air.

Photo 13

Power receiver

Inlet

Separator

Outlet

Four-way valve

PUHZ-RP4VHA1 PUHZ-RP5VHA1 PUHZ-RP6VHA1

OPERATING PROCEDURE

1. Removing the service panel and top panel

(1) Remove 3 service panel fixing screws (5 ✕ 10) and slide

the hook on the right downward to remove the service panel.

(2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top

panel and remove it.

2. Removing the fan motor (MF1, MF2)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 5 fan grille fixing screws (5 ✕ 10) to detach the

fan grille. (See figure 1.)

(4) Remove a nut (for right handed screw of M6) to detach

the propeller. (See photo 1.)

(5) Disconnect the connectors, FAN11, FAN12, FAN21 and

FAN 22 on controller circuit board in electrical parts box.

(6) Remove 4 fan motor fixing screws (5 ✕ 25) to detach the

fan motor. (See photo 2.)

Figure 1

Grille fixing screws

Photo 1

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Slide

Front panel

Propeller

Photo 2

Fan motor fixing screws

Top panel

Service panel

Fan grille

Service panel fixing screws

Fan motor

3. Removing the electrical parts box

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the indoor/outdoor connecting wire from

terminal block.

(4) Remove all the following connectors from controller circuit board;

• Fan motor (FAN11, FAN12, FAN21 and FAN22)

• Linear expansion valve (LEV-Aand LEV-B)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• Thermistor <Heat sink> (CN3)

• High pressure switch (63H)

• Low pressure switch (63L)

• Solenoid valve coil <Four-way valve> (21S4)

• Solenoid valve coil <Bypass valve> (SV2)

(5) Remove the terminal cover and disconnect the

compressor lead wire.

(6) Remove an electrical parts box fixing screw (4 ✕ 10) and

detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.

Photo 3

Controller circuit board (C.B.)

Screw

Cover panel fixing screws

Fan motor fixing screws

Electrical parts box

Electrical parts box fixing screw

Terminal block (TB1)

Valve bed

Motor for compressor (MC)

Terminal cover

Cover panel (Front)

OPERATING PROCEDURE PHOTOS

4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connectors, TH6 and TH7 (red), on the

controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the

electrical parts box.

(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)

from the sensor holder. Note: In case of replacing thermistor <Outdoor 2-phase pipe>

(TH6), replace it together with thermistor <Outdoor> (TH7) since they are combined together. Refer to No.5 below to remove thermistor <Outdoor>.

5. Removing the thermistor <Outdoor> (TH7)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit

board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.) (5) Pull out the thermistor <Outdoor> (TH7) from the sensor

holder.

Photo 4

Controller circuit board (C.B.)

Photo 5

Electrical parts box

Thermistor <Outdoor 2-phase pipe>

(TH6)

Clamp

Note: In case of replacing thermistor <Outdoor> (TH7),

replace it together with thermistor <Outdoor 2-phase pipe> (TH6), since they are combined together. Refer to No.4 above to remove thermistor <Outdoor 2-phase pipe>.

6. Removing the thermistor <Outdoor pipe> (TH3) and thermistor <Discharge> (TH4)

(1) Remove the service panel. (See figure 1.) (2) Disconnect the connectors, TH3 (white) and TH4 (white),

on the controller circuit board in the electrical parts box.

(3) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(4) Pull out the thermistor <Outdoor pipe> (TH3) and

thermistor <Discharge> (TH4) from the sensor holder.

Thermistor <Outdoor>

(TH7)

Photo 6

Thermistor <Discharge>

(TH4)

Sensor holder

Thermistor <Outdoor pipe>

(TH3)

Motor for compressor (MC)

OPERATING PROCEDURE

PHOTOS

7. Removing the solenoid valve coil <Four-way valve> (21S4), and linear expansion valve coil (LEV(A), LEV(B))

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.)

[Removing the solenoid valve coil <Four-way valve>]

(3) Remove four-way valve solenoid coil fixing screw

(M4 ✕ 6).

(4) Remove the solenoid valve coil <Four-way valve> by

sliding the coil toward you.

(5) Disconnect the connector 21S4 (green) on the controller

circuit board in the electrical parts box.

[Removing the linear expansion valve coil]

(3) Remove the linear expansion valve coil by sliding the coil

upward.

(4) Disconnect the connectors, LEV A(white) and LEV B (red),

on the controller circuit board in the electrical parts box.

8. Removing the four-way valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(4) Remove 4 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel.

(5) Remove the solenoid valve coil <Four-way valve>.

the right side panel.

Note 3: When installing the four-way valve, cover it with a wet

cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

9. Removing linear expansion valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then

remove the valve bed. (4) Remove 4 right side panel fixing screw (5 ✕ 10) in the

the right side panel.

Note 3: When installing the linear expansion valve, cover it

with a wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

Photo 7

Solenoid valve coil <Four-way valve> (21S4)

Solenoid valve coil <Four-way valve> fixing screw

Photo 8

Charge plug (High pressure)

Linear expansion valve coil (LEV B)

Linear expansion valve

Linear expansion valve coil (LEV A)

Four-way valve

Linear expansion valve coil (LEV B)

Linear expansion valve coil (LEV A)

Linear expansion valve

Four-way valve

Charge plug (Low pressure)

OPERATING PROCEDURE

PHOTOS

10. Removing solenoid valve coil <Bypass valve> (SV) and bypass valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 ✕ 10) in the

rear of the unit and remove the right side panel.

(4) Remove the bypass valve solenoid coil fixing screw

(M4 ✕ 6).

(5) Remove the solenoid valve coil <Bypass valve> by

sliding the coil upward.

(6) Disconnect the connector SV2 (blue) on the controller

circuit board in the electrical parts box. (7) Collect the refrigerant. (8) Remove the welded part of bypass valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

11. Removing the high pressure switch (63H) and low pressure switch (63L)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 ✕ 10) in the

rear of the unit and remove the right side panel.

(4) Pull out the lead wire of high pressure switch and low

pressure switch. (5) Collect the refrigerant. (6) Remove the welded part of high pressure switch and low

pressure switch.

Photo 9

Four-way valve

Solenoid valve coil <Bypass valve> fixing screw

Photo 10

High pressure switch (63H)

Solenoid valve coil <Bypass valve> (SV)

Bypass valve

Four-way valve

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing

the right side panel.

Note 3: When installing the high pressure switch, cover it with

a wet cloth to prevent it from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized.

12. Removing the reactor (DCL) and capacitor (CE)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) <Removing the reactor> (4) Remove 4 reactor fixing screws (4 ✕ 10) and remove the

reactor. <Removing the capacitor> (4) Remove 2 capacitor band fixing screws (4 ✕ 10) and

remove the capacitor.

w The reactor and capacitor is attached to the rear of the

electrical parts box.

Photo 11

Reactor fixing screws

Reactor (DCL)

Low pressure switch (63L)

Electrical parts box

Reactor fixing screws

Capacitor (CE)

Capacitor band fixing screws

OPERATING PROCEDURE

PHOTOS

13. Removing the motor for compressor (MC)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the rear

of the unit and then remove the right side panel. (8) Remove 3 separator fixing screws (4 ✕ 10) and remove

the separator. (9) Collect the refrigerant. (10) Remove the 3 points of the motor for compressor fixing

nut using a spanner or a monkey wrench.

(11) Remove the welded pipe of motor for compressor inlet

and outlet and then remove the compressor.

Note: Collect refrigerant without spreading it in the air.

Photo 12

Valve bed

Separator

Separator fixing screw

Valve bed fixing screws

Power receiver

Motor for compressor (MC)

Compressor

fixing nut

14. Removing the power receiver

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (8) Collect the refrigerant. (9) Remove 4 welded pipes of power receiver inlet and outlet. (10) Remove 2 receiver leg fixing screws (4 ✕ 10).

Note: Collect refrigerant without spreading it in the air.

Photo 13

Motor for compressor (MC)

Inlet

Outlet

Power receiver

Receiver leg

Receiver leg fixing screws

13 PARTS LIST

Part No. Specification

No.

Wining

Diagram

Symbol

Recom-

mended

Q,ty

Price

Unit

Amount

Part Name

Q,ty/set

PUHZ-RP1.6VHA PUHZ-RP2VHA

Remarks

(Drawing No.)

1 2 3 4 5 6 7 8

9 10 11 12 13

1 1 1 1 1 1 1 1 2 1 1 1

(4✕10)

R01 E10 691 R01 E02 668 R01 E15 686

— R01 E02 667 R01 E00 518 R01 E02 682 R01 E09 130 R01 E01 684 T7W E01 641

—

GRILLE FRONT PANEL BASE ASSY SEPARATOR SERVICE PANEL SERVICE PANEL BACK PANEL MOTOR SUPPORT CONDENSER NET TOP PANEL LABEL (MITSUBISHI) LABEL (INVERTER) F.ST SCREW

(SU00B229G35)

(DG79R130H01) (BK79C208G01)

(Z504K189H37)

STRUCTURAL PARTS PUHZ-RP1.6VHA PUHZ-RP2VHA

1 2

3 4 5

STRUCTURAL PARTS

Part No. Specification

No.

Wining

Diagram

Symbol

Recom-

mended

Q,ty

Price

Unit

Amount

Part Name

PUHZ-RP

Q,ty/set

2.5, 3

VHA, VHA

Remarks

(Drawing No.)

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18

1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1

(5✕10)

— R01 E01 662 T7W E02 691 T7W E01 667

— R01 E13 686 R01 E06 130

— R01 30L 655 R01 E02 658 R01 E01 658 R01 E03 661 T7W E02 668

—

— R01 E00 698 R01 E04 641 R01 E00 655

F.ST SCREW SIDE PANEL (L) FAN GRILLE FRONT PANEL SEPARATOR BASE ASSY MOTOR SUPPORT VALVE BED ASSY HANDLE COVER PANEL (FRONT) COVER PANEL (REAR) SIDE PANEL (R) SERVICE PANEL LABEL (MITSUBISHI) LABEL (INVERTER) REAR GUARD TOP PANEL HANDLE

(DG12F536H10)

(BK00C143G25)

(BK00C142G07)

(DG79R130H01) (BK79C208G02)

PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

141213

STRUCTURAL PARTS PUHZ-RP4VHA PUHZ-RP4VHA1 PUHZ-RP5VHA PUHZ-RP5VHA1 PUHZ-RP6VHA PUHZ-RP6VHA1

141213

No.

10 11 12 13 14 15 16 17 18

Part No. Part Name

1 2

R01 E02 662

T7W E02 691

T7W E02 667

R01 E14 686

R01 E07 130 8 9

R01 30L 655

R01 E00 658

R01 E01 658

R01 E04 661

T7W E03 668

R01 E01 698

R01 E04 641

R01 E00 655

—

— —

F.ST SCREW SIDE PANEL (L) FAN GRILLE FRONT PANEL

SEPARATOR

BASE ASSY MOTOR SUPPORT VALVE BED ASSY HANDLE COVER PANEL (FRONT) COVER PANEL (REAR) SIDE PANEL (R) SERVICE PANEL LABEL (MITSUBISHI) LABEL (INVERTER) REAR GUARD TOP PANEL HANDLE

Specificatio

(5✕10)

Q,ty/set

PUHZ-RP

VHA, VHA

Remarks

(Drawing No.)

(DG12F536H10)

1 2 1

VHA (BK00C143G27)

VHA

1(BK00C143G43)

1 1 1

(BK00C142G07) 2 1 1 1 1 1

(DG79R130H01) 1

(BK79C208G02) 1 1 1

Wining

Diagram

Symbol

Recom-

mended

Q,ty

Unit

Price

Amount

FUNCTIONAL PARTS PUHZ-RP1.6VHA PUHZ-RP2VHA

262728

FUSE

18 17

15 14

5 6

7 8

Price

Part No. Part Name

Specification

No.

Wining

Diagram

Symbol

Recommended

Q,ty

Unit

Amount

Remarks

(Drawing No.)

Q,ty/set

PUHZ-RP1.6VHA PUHZ-RP2VHA

1 2 3 4

6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

MF1

TH4

TH3

21S4

LEV(A)

63H

LEV(B) TH6,7

ACL

TB1

FUSE1,2,3,4

N.F. C.B. P.B.

TH8

R01 E30 221 R01 E02 115 R01 E04 097 R01 E09 467

T97 420 210

R01 E03 201 R01 E15 440 R01 30L 450 R01 E06 411 R01 E06 410 R01 E56 202 T7W E05 242 R01 E39 401 R01 E16 242 R01 E07 403 T7W E02 208 R01 E07 403 R01 E17 242 R01 E69 202 R01 E06 259 T7W E21 716 T7W 520 239 T7W E05 346 T7W E21 315 T7W E09 313 R01 E65 202

— R01 E48 408 R01 E09 413

FAN MOTOR PROPELLER NUT MUFFLER

MOTOR FOR COMPRESSOR

THERMISTOR (DISCHARGE) POWER RECEIVER STRAINER STOP VALVE (GAS) STOP VALVE (LQUID) THERMISTOR (OUTDOOR PIPE) SOLENOID VALVE COIL (FOUR-WAY VALVE) EXPANSION VALVE LINEAR EXPANSION VALVE COIL CHARGE PLUG HIGH PRESSURE SWITCH FOUR-WAY VALVE LINEAR EXPANSION VALVE COIL THERMISTOR (OUTDOOR 2-PHASE PIPE, OUTDOOR) REACTOR TERMINAL BLOCK FUSE NOISE FILTER CONTROLLER CIRCUIT BOARD POWER CIRCUIT BOARD THERMISTOR (HEAT SINK) ELECTRICAL PARTS BOX HEAT EXCHANGER CHARGE PLUG

1 1 1 1

1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1

SNB130FLBH Including RUBBER MOUNT

1/2 1/4

6P(L,N,;,S1,S2,S3) 250V 6.3A

(RG00N040G08)

Part numbers that is circled is not shown in the figure.

FUNCTIONAL PARTS PUHZ-RP2.5VHA PUHZ-RP2.5VHA1 PUHZ-RP3VHA PUHZ-RP3VHA1

FUSE

21 20

No.

Part No. Part Name

R01 E28 221

R01 E01 115

R01 E02 097 4 5 6 7 8 9

— T7W E00 242 R01 E03 428 R01 E15 425 R01 E16 425 R01 17T 201 R01 E06 413 R01 E10 413

T97 410 240

R01 E67 202

R01 E71 202

R01 E05 411

R01 E05 410

R01 36L 450

R01 E13 440

R01 E05 403

T7W E05 242

R01 E34 401 R01 E08 242

R01 E16 242 R01 E12 242

R01 E17 242

R01 E68 202 T7W E01 208

T7W E02 208

R01 E01 490

R01 E06 259

T7W E03 346

T7W E22 315

R01 E65 202

T7W E10 313

R01 E44 408

T7W 520 239

T7W E16 716

Q,ty/set

Specification

FAN MOTOR PROPELLER NUT ELECTRICAL PARTS BOX SOLENOID VALVE COIL <BYPASS VALVE> BYPASS VALVE CAPILLARY TUBE CAPILLARY TUBE

[4.0 ✕ [2.4 ✕ 500mm [2.5 ✕ [0.6 ✕ 1000mm

THERMISTOR (DISCHARGE) CHARGE PLUG CHARGE PLUG

PUHZ-RP

2.5

VHA

VHA1

TNB220FMBH

MOTOR FOR COMPRESSOR

Including

RUBBER MOUNT

THERMISTOR (OUTDOOR PIPE) THERMISTOR (OUTDOOR PIPE) STOP VALVE BALL VALVE

3/8

5/8 STRAINER POWER RECEIVER FOUR-WAY VALVE SOLENOID VALVE COIL <FOUR-WAY VALVE> EXPANSION VALVE LINEAR EXPANSION VALVE COIL LINEAR EXPANSION VALVE COIL LINEAR EXPANSION VALVE COIL LINEAR EXPANSION VALVE COIL THERMISTOR (OUTDOOR 2-PHASE PIPE, OUTDOOR) HIGH PRESSURE SWITCH HIGH PRESSURE SWITCH OIL SEPARATOR REACTOR NOISE FILTER CIRCUIT BOARD CONTROLLER CIRCUIT BOARD THERMISTOR (HEAT SINK) POWER CIRCUIT BOARD HEAT EXCHANGER FUSE TERMINAL BLOCK

250V 6.3A

6P(L,N,;,S1,S2,S3)

VHA

1 1 1 1 1 1 1 1 1 2

1 1 1 1 1 1 2 1

1 1

1 1 1 1 1 1 1 4 1

Remarks

(Drawing No.)

VHA1

1 1 1

(BK00B055G19)

1 1 1 1 1 1

1 1 1 1 1 1 1 2

1 1

1 1 1 1 1 1 1 1 4 1

Wining

Diagram

Symbol

Recom-

mended

Q,ty

MF1

TH4

TH3 TH3

21S4

LEV(A) LEV(A) LEV(B) LEV(B) TH6,7

63H 63H

ACL

N.F.

C.B.

TH8

P.B.

FUSE1,2,3,4

TB1

Unit

Price

Amount

FUNCTIONAL PARTS PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA

FUSE

19 18 17

16 15

Part numbers that is circled is not shown in the figure.

Part No. Part Name SpecificationNo.

R01 E29 221

R01 E01 115

R01 E02 097

R01 E46 408 5 6

—

R01 E14 440

FAN MOTOR PROPELLER NUT HEAT EXCHANGER ELECTRICAL PARTS BOX POWER RECEIVER

ANV33FDAMT

T97 410 740

MOTOR FOR COMPRESSOR

Including RUBBER MOUNT

R01 E05 411 9

R01 E02 201

R01 E05 410

R01 36L 450

R01 E02 418

R01 E05 467

14 15

R01 E66 202

R01 E06 413

R01 E08 413

R01 E03 428

T7W E00 242

R01 E33 401

T7W E03 242

R01 E06 403

T7W A01 242

R01 E68 202

T7W E01 208

R01 25T 209

T7W E01 259

T7W E07 313

T7W E22 315

R01 E65 202

T7W E00 233

T7W E04 346

T7W E16 716

T7W 520 239

T7W E02 259

T7W E01 234

T7W E04 242

T7W E05 254

—

STOP VALVE

3/8

THERMISTOR (DISCHARGE) BALL VALVE

5/8

STRAINER RESTRICTOR VALVE MUFFLER REPLACE FILTER THERMISTOR (OUTDOOR PIPE) CHARGE PLUG CHARGE PLUG BYPASS VALVE SOLENOID VALVE COIL <BYPASS VALVE> EXPANSION VALVE LINEAR EXPANSION VALVE COIL FOUR-WAY VALVE SOLENOID COIL <FOUR-WAY VALVE>

THERMISTOR (OUTDOOR 2-PHASE PIPE, OUTDOOR)

HIGH PRESSURE SWITCH LOW PRESSURE SWITCH REACTOR POWER CIRCUIT BOARD CONTROLLER CIRCUIT BOARD THERMISTOR (HEAT SINK) ACTIVE FILTER MODULE NOISE FILTER CIRCUIT BOARD TERMINAL BLOCK FUSE

6P(L,N,;,S1,S2,S3) 250V 6.3A

52C RELAY RESISTOR LINEAR EXPANSION VALVE COIL MAIN SMOOTHING CAPACITOR

Q,ty/set

PUHZ-RP

VHA

Remarks

(Drawing No.)

2 2 2 1 1

(BK00B055G18)

1 1 1 1 1 1 1

(BK00C119G02) 1 1 1 1 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 4 1 1 1 1

Wining

Diagram

Symbol

Recommended

Q,ty

MF1,2

TH4

TH3

LEV(A)

21S4

TH6,7

63H

63L

DCL1, DCL2

P.B. C.B.

TH8

ACTM

N.F. TB1

FUSE1,2,3,4

52C

LEV(B)

Price

Unit

Amount

FUNCTIONAL PARTS PUHZ-RP4VHA1 PUHZ-RP5VHA1 PUHZ-RP6VHA1

32333435

24 23

22 21

15 20

19 18

17 16

15 14

13 12

100

Mitsubishi PUHZ-RP3VHA1, PUHZ-RP2.5VHA, PUHZ-RP4VHA, PUHZ-RP2VHA, PUHZ-RP4VHA1 Technical & Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual