Mitsubishi PUHZ-RP200YHA2, PUHZ-RP250YHA2 Service Manual

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Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A

Outdoor unit [model names]

PUHZ-RP200YHA2

PUHZ-RP250YHA2

[Service Ref.]

PUHZ-RP200YHA2 PUHZ-RP250YHA2

November 2007

No.OCH428

Note:

• This manual describes only

service data of the outdoor units.

• RoHS compliant products

have <G> mark on the spec name plate.

PUHZ-RP200YHA2 PUHZ-RP250YHA2

CONTENTS

1. REFERENCE MANUAL ································ 2

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

3. FEATURES····················································7

4. SPECIFICATIONS ········································· 8

5. DATA······························································ 9

6. OUTLINES AND DIMENSIONS ·················· 12

7. WIRING DIAGRAM ····································· 13

8. WIRING SPECIFICATIONS························· 14 REFRIGERANT SYSTEM DIAGRAM

10. TROUBLESHOOTING································· 21

11. FUNCTION SETTING ·································· 73

12.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

13. EASY MAINTENANCE FUNCTION··············90

14. DISASSEMBLY PROCEDURE···················· 93

············ 19

········· 80

PARTS CATALOG (OCB428)

Page 2

REFERENCE MANUAL

INDOOR UNIT’S SERVICE MANUAL

Model name Service Ref.

PLA-RP35/50/60/71/100/125/140BA PLA-RP35/50/60/71/100/125/140BA

PCA-RP50/60/71/100/125/140GA PCA-RP50/60/71/100/125/140GA PCA-RP50GA2 PCA-RP50GA2

PCA-RP71/125HA

PKA-RP35/50GAL PKA-RP35/50GAL

PKA-RP60/71/100FAL PKA-RP60/71/100FAL PKA-RP50FAL2 PKA-RP50FAL2

PEAD-RP50/60/71/125/140EA PEAD-RP35/100EA2

PEAD-RP60/71/100GA

PEA-RP200/250/400/500GA

PCA-RP71/125HA

PEAD-RP50/60/71/125/140EA.UK PEAD-RP35/100EA2.UK

PEAD-RP60/71/100GA.UK

PEA-RP200/250/400/500GA.TH-AF PEA-RP200/250GA.TH-AFMF

(1).UK

Service

Manual No.

OCH412 OCB412

OC328

OC329

OC330

OC331

HWE05210

HWE05060

HWE0708A

Page 3

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply circuits must be disconnected.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

Use new refrigerant pipes.

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

· Be sure to perform replacement operation before test run.

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

· Avoid using thin 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.

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

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.)

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

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.

Tools for R410A Gauge manifold Charge hose

Gas leak detector

Torque wrench

Flare tool Size adjustment gauge Vacuum pump adaptor

Electronic refrigerant charging scale

Keep the tools with care.

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

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

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

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 a charging cylinder.

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

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

Page 4

[1] Cautions for service

(1) Perform service after recovering 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. Tool name Specifications

 Gauge manifold ·Only for R410A

·Use the existing fitting

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

 Charge hose ·Only for R410A

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

 Electronic scale

 Gas leak detector ·Use the detector for R134a, R407C or R410A.

 Adaptor for reverse flow check ·Attach on vacuum pump.

 Refrigerant charge base

 Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

 Refrigerant recovery equipment

specifications

. (UNF1/2)

Page 5

2-3. Precautions when reusing existing R22 refrigerant pipes

(1) Flowchart

Measure the existing pipe thickness and check for damage.

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

Check if the existing air conditioner can operate.

The existing air conditioner can operate. The existing air conditioner cannot operate.

After operating the cooling system for about 30 minutes, do a pump down work.

Disconnect the existing air conditioner from the pipes.

The existing piping can be reused. After flaring the pipes again, connect the new air conditioner.

Use a refrigerant recovery device to recover the refrigerant.

Check the oil condition when recovering refrigerant.

Oil is clean. (Clear to brownish color)

In case that existing pipes were used for gas or oil heat pump system, be sure to clean the pipes.

Oil is dirty. (Black color)

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

When the compressor bearings are seized, winding is damaged or the compressor breaks down, iron particles or oil deterioration will blacken the oil.

The existing pipes cannot be reused. Use new pipes.

Perform the following inspections: air tightness test, vacuum dryness (additional refrigerant charge), gas leakage check

Replacement operation

Test operation

·When performing replacement operation, make sure that DIP SW8-2 on outdoor unit controller board is set to ON.

+Chemical compounds containing chlorine left in existing pipes are recovered by replace filter. LThe air conditioner automatically performs cooling operation through replace filter for about 2 hours.

Connecting a new air conditioner to existing R22 refrigerant pipes

 Flare the pipe for the use with R410A refrigerant.

Use the flare nut attached to indoor and outdoor unit of the new air conditioner only.

 When reusing existing R22 refrigerant pipes of which gas pipe is :28.58mm and, when the outdoor unit is installed to lower

position than the indoor unit, be sure to change the setting of the DIP SW8-1 on the controller circuit board of the outdoor unit to ON.

=This is to increase the speed of refrigerant passing in the gas pipe so that refrigerant oil can smoothly flow in the system.

• Use a different-diameter joint or brazing for the connection.

 When reusing standard-size existing R22 refrigerant pipes.

The pipes can be reused with pipe length restriction described on TECHNICAL DATA BOOK.

Page 6

(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

17.0

22.0

26.0

29.0

36.0

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions(inch)

Flare nut dimensions

Outside

diameter

Dimension B

(mm)

R410A R22

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is 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.

Thickness 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.)

Diagram below: Piping diameter and thickness

Nominal

dimensions (inch)

1/4 3/8 1/2 5/8 3/4 7/8

1-1/8

Outside

diameter (mm)

6.35

9.52

12.70

15.88

19.05

22.20

25.40

28.58

Thickness (mm)

R410A R22

0.8

1.0 — — — —

0.8

1.0

Dimensions 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 refriger ants. 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 inch, the dimension B changes. Use torque wrench corresponding to each dimension.

Dimension A

Flare cutting dimensions

Nominal

dimensions(inch)

Outside

diameter 1/4 3/8 1/2 5/8 3/4

6.35

9.52

12.70

15.88

19.05

Dimension A

R410A R22

9.1

13.2

16.6

19.7

24.0

( )

-0.4

9.0

13.0

16.2

19.4

23.3

(mm)

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

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

: 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.

Air purge, refrigerant charge and operation check Gas leak check

Refrigerant recovery 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 Refrigerant charge Check the degree of vacuum. (Vacuum

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

Tool exclusive for R410A Tool exclusive for R410A Tool for HFC refrigerant Tool exclusive for R410A Tool exclusive for R410A Ester oil, ether 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

(Usable if equipped

with adopter for rever se flow)

(Usable 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

Dimension B

Can R407C tools be used?

Ester oil, ether oil: Alkylbenzene oil: minimum amount

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting

flaring dimension)

Page 7

3 FEATURES

3-1. COMBINATION OF INDOOR AND OUT DOOR UNITS

3-1-1. 1:1 SYSTEM, 1:2 SYSTEM

Outdoor unit

Indoor unit

PEA-RP200, 250GA

3-1-2. SYNCHRONIZED TWIN, TRIPLE AND QUADRUPLE SYSTEM (1) Synchronized twin (50:50)

Indoor unit

PLA-RP100BA 2 PLA-RP125BA2 PEAD-RP100EA2 2

PEAD-RP125EA 2

PEAD-RP100GA 2

PKA-RP100FAL 2

PCA-RP100GA 2

PCA-RP125GA 2

PCA-RP125HA 2

PUHZ-RP·YHA2

200 250

Outdoor unit

PUHZ-RP·YHA2

200 250

Indoor unit

200  2 250  2

PEA-RP400, 500GA

(2) Synchronized triple (33:33:33)

Outdoor unit

Indoor unit

PLA-RP60BA 3 PLA-RP71BA 3

PEAD-RP60EA 3 PEAD-RP71EA 3 PEAD-RP60GA 3 PEAD-RP71GA 3 PKA-RP60FAL 3 PKA-RP71FAL 3 PCA-RP60GA 3 PCA-RP71GA 3 PCA-RP71HA 3

PUHZ-RP·YHA2

200 250

PUHZ-RP·YHA2

Outdoor unit

(3)

Synchronized quadruple (25:25:25:25)

PLA-RP50BA 4 PLA-RP60BA 4

PEAD-RP50EA 4 PEAD-RP60EA 4 PEAD-RP60GA 4 PKA-RP50GAL 4 PKA-RP50FAL2 4 PKA-RP60FAL 4 PCA-RP50GA(2) 4

PCA-RP60GA

Indoor unit

Outdoor unit

PUHZ-RP·YHA2

200 250

4

3-1-3. MULTI DISTRIBUTION PIPE (OPTION)

Ratio of distributing Part No.

Synchronized twin 50:50 MSDD-50WR-E

Synchronized triple 33:33:33 MSDT-111R-E

Synchronized quadruple 25:25:25:25 MSDF-1111R-E

3-2. FEATURES

PUHZ-RP200YHA2 PUHZ-RP250YHA2

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m)

The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator 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. It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work done. It also helps to speed up the installation time.

Page 8

4 SPECIFICATIONS

Service Ref.

Mode

Power supply (phase, cycle, voltage) Running current Max. current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices

Crankcase heater Heat exchanger Fan Fan(drive) % No. Fan motor output Airflow

OUTDOOR UNIT

Defrost method Noise level

Dimensions

Weight Refrigerant Charge Oil (Model) Pipe size O.D.

Connection method

Between the indoor & outdoor unit

REFRIGERANT PIPING

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.)

A A

/min(L/s

dB dB

PUHZ-RP250YHA2PUHZ-RP200YHA2

Cooling

7.70

HP switch

Comp. Shell thermo

)

135(297)

6.5(14.3)

2.30(FV50S)

9.52(3/8)

25.4(1)

4.7

58 59

Heating

3 phase 50Hz, 400V

8.90

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

ANB52FFJMT

Inverter

—

Plate fin coil

Propeller fan % 2

0.150 + 0.150 130(2170)

Reverse cycle

950(37-3/8)

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

1,350(53-1/8)

R410A

Flared

Flared & Brazing

Max. 30m

Max. 120m

Cooling

9.50

HP switch, LP switch

5.5

Discharge thermo

58 59

136(299)

7.1(15.7)

1.60(FV50S)

12.7(1/2)

25.4(1)

Heating

11.1

Page 9

5 DATA

Amount of additional refrigerant charge (kg)

30 m and less 31-40 m and less 41-50 m and less 51-60 m and less 61-70 m and less 71-120 m and less

0.9 kg 1.8 kg 2.7 kg 3.6 kg

1.2 kg 2.4 kg 3.6 kg 4.8 kg

Outdoor unit

Permitted pipe length

RP200

RP250

120m or less

Initial charge

(kg)

6.5

7.1

No additional

charge necessary

The additional charge amount is obtained by the following formula.

Main piping: Liquid line size :9.52 overall length [m]

0.09

[kg/m]

Branch piping: Liquid line size :9.52 overall length [m] % 0.06 [kg/m]

Branch piping: Liquid line size :6.35 overall length [m] % 0.02 [kg/m]

3.6 (kg)

Amount of additional charge [kg]

Main piping: Liquid line size :12.7 over all length [m] % 0.12 [kg/m]

Additional charge amount for 70 m

RP200 3.6 kg RP250 4.8 kg

+–

Calculate the additional charge amount based on the following procedure. If the calculation results in an amount that is smaller than the "Additional charge amount for 70m," perform the additional charge using the amount shown in "Additional charge amount for 70m."

5-1. ADJUSTING THE AMOUNT OF REFRIGERANT

5-2. COMPRESSOR TECHNICAL DATA

DWÛ&

Unit

Compressor model

PUHZ-RP200, 250YHA2

ANB52FFJMT

U-V

0.30

Winding

Resistance

U-W

0.30

(  )

W-V

0.30

5-3. NOISE CRITERION CURVES

MICROPHONE

1.5m

UNIT

GROUND

PUHZ-RP200YHA2 PUHZ-RP250YHA2

COOLING

HEATING

58 59

SPL(dB)

MODE

LINE

NC-70

NC-60

NC-50

NC-40

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

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-30

NC-20

Page 10

5-4. ELECTRICAL PARTS SPECIFICATIONS

Outdoor unit

PUHZ-RP200YHA2

Parts name

FUSE

(FUSE1,2)

PUHZ-RP250YHA2

250V 15A

FUSE

(F 3,4)

Valve

4-way Valve Coil

21S4

Linear Expansion

Valve

Linear Expansion

Valve Coil

(LEV-A)(LEV-B)

Bypass Valve

Bypass Valve Coil

(SV)

Reactor

(DCL)

High pressure switch

(63H1)

High Pressure

Switch

(63H, 63H2)

Low Pressure

Switch

(63L)

Fan Motor

(MF1)(MF2)

Thermistor

(Outdoor Pipe)

(TH3)

Thermistor

(Discharge)

(TH4)

Thermistor

(Outdoor2-PhasePipe)

(TH6)

Thermistor

(Outdoor)

(TH7)

7HUPLQDO%ORFN

(Power Supply)

(TB1)

7HUPLQDO%ORFN

(Indoor / Outdoor)

(TB2)

Main Smoothing Capacitor

(CB1, CB2)

Rush Current

Protect Resister

(RS)

Compressor

(MC)

250V 6.3A

STF0731Z

STF AC220~240V

(BG50T388)

UKV-32D

(0~480 Pulse)

DC12V

FDF6A-008-RK

FQ AC220~240V

2.7mH 25A

—

OFF 3.60 + 0.2MPa

ON 2.80 ± 0.15MPa

—

8P 150W % 2

SIC-81FW-D8187

Û&NÛ&NÛ&NÛ&NÛ&NÛ&N

Û&NÛ&NÛ&NÛ&NÛ&NÛ&NÛ&NÛ&NÛ&N

Û&NÛ&NÛ&NÛ&NÛ&NÛ&N

(L1, L2, L3, N, )

(S1, S2, S3)

2200 400V

:

ANB52FFJMT

Scroll type 6P

OFF 4.14±0.1MPa / ON 3.14±0.15MPa

HAM-BD35

(0~480 Pulse)

ACB-1UB24

OFF -0.03 ± 0.03MPa

ON 0.05 ± 0.04MPa

Page 11

PUHZ-RP250YHA2PUHZ-RP200YHA2

PLA-RP125BA ×2PLA-RP100BA ×2

PLA-RP125BAPLA-RP100BA

3, 50

1, 501, 50

230230

400

HeatingCooling

11.1

2.37

(24.2)

0.60

(6.12)

72.8

41.2

0.9

7.5

41.1

–

9.50

2.86

(29.2)

0.89

(9.08)

78.2

48.4

16.2

7.5

14.2

0.77

0.10

8.90

2.46

(25.1)

0.64

(6.53)

65.6

42.9

-0.1

7.5

38.1

–

7.70

2.71

(27.6)

0.95

(9.69)

66.1

46.3

11.5

7.5

15.3

0.78

0.13

0.13 ×20.14 ×2

0.94 ×2 0.87 ×2

0.14 ×20.15 ×2

1.00 ×2 0.94 ×2

19,000 22,400 22,000 27,000

5.19 6.10 6.83 7.48

Electrical circuitRefrigerant circuitIndoor side

Outdoor

side

Representative matching

SHF

Mode

Capacty

Input

Total

(kgf/%)

Phase , Hz

Voltage

Input

Current

Outdoor unit

Phase , Hz

Voltage

Current

Discharge pressure

Suction pressure

Discharge temperature

Condensing temperature

Suction temperature

Ref. pipe length

Intake air temperature

Discharge air temperature

Intake air temperature

Mpa

Û&

Indoor unit

D.B.

W.B.

D.B.

W.B.

5-5. STANDARD OPERATION DATA

The unit of pressure has been changed to MPa based on international SI system. The conversion factor is : 1(MPa)=10.2(kgf/cm2)

Page 12

6 OUTLINES AND DIMENSIONS

PUHZ-RP200YHA2 PUHZ-RP250YHA2

175600175

2-U Shaped notched holes

(foundation Bolt M10)

Installation Feet

Rear Air Intake

40560

417

37028 19

33030

Terminal Connections

Left···Power supply wiring

60 37

2-12%36 oval holes

(Foundation Bolt M10)

Air Discharge

)

Right···Indoor/Outdoor wiring

(

Earth terminal

950

322

Handle for moving

Service Panel

635



1350

Unit : mm

999

995



Brazing

*1 439

*1 A

371

*2 339

Front piping cover

Rear piping cover

Bottom piping hole

(Knockout)

219

Drain hole

(5-:33)

14514514522030

Side Air Intake

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

4 PIPING-WIRING DIRECTIONS

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

3 FOUNDATION BOLTS2 SERVICE SPACE

purchased locally.)

150

Over

Dimensions of space needed

for service access are

shown in the below diagram.

FREE

FOUNDATION

Less than

500

Over

500

Over

Service space

Over 150mm

Over 10mm

Handle for moving

Side Air Intake

Rear Air Intake

Handle for moving

447



:9.52

(3/8 inch)

421

:12.7

(1/2 inch)

Air Intake

Power supply wiring hole

(2-:27Knockout)

Rear trunking hole

(Knockout)

4045

5527

Right trunking hole

(Knockout)

Power supply wiring hole

4075

(2-:27Knockout)

6373

Right piping hole

(Knockout)

5527

40 45

Power supply wiring hole

(2-:27Knockout)

Rear piping hole

:92

637323

:92

922723

6373

:92

(Knockout)

5519

The diagram below shows a basic

example.

Explantion of particular details is

given in the installation manuals etc.

1 FREE SPACE (Around the unit)

Over 10mm

Over 1000mm

· · · ·Refrigerant GAS pipe connction (FLARE):19.05(3/4 inch)

· · · ·Refrigerant LIQUID pipe connection (FLARE)

Example of Notes





*1· · · ·Indication of STOP VALVE connection location

*2· · · ·Refrigerant GAS PIPE connention(BRAZING) O.D:25.4

PUHZ-RP250YHA2

PUHZ-RP200YHA2

Front trunking hole

(Knockout)

Front piping hole

(Knockout)

Piping Knockout Hole Details

Page 13

7 WIRING DIAGRAM

PUHZ-RP200YHA2 PUHZ-RP250YHA2

[LEGEND]

SYMBOL TB1 TB2 Terminal Block<Indoor/Outdoor> MC MF1,MF2 21S4 SV Solenoid Valve (Bypass Valve) 63H,63H1,63H2 63L Low Pressure Switch TH3 TH4 TH6 TH7 LEV-A,LEV-B ACL4 DCL CB1,CB2 RS FUSE1, FUSE2 CY1,CY2

Terminal Block<Power Supply>

Motor for Compressor Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch

Thermistor<Outdoor Pipe>

Thermistor<Discharge> Thermistor<Outdoor 2-Phase Pipe> Thermistor<Outdoor> Electronic Expansion Valve

Reactor Reactor Main Smoothing Capacitor Rush Current Protect Resistor

Fuse<T15AL250V> Capacitor

C. B.

MF1

MS 3~

MF2

MS 3~

TB2

INDOOR UNIT

NAME SYMBOL NAME SYMBOL NAME

TH7TH6 TH3 TH4

WÛ WÛ WÛ WÛ

CNF1

CNS

(WHT)

CY2

CY1

BRN

ORN

(WHT)

CNF2

(WHT)

YLW

CNDC (PNK)

WHT

FUSE1

WHT

412121 TH7/6 (RED)

(WHT)

TRANS

CNAC (WHT)

REDRED

FUSE2

P.B.

SC-U/V/W TB-L1/L2/L3 TB-P1 TB-P2 TB-C1 TB-N1 X52A

N.F.

LI1/ LI2/LI3/NI LO1/ LO2/LO3 GD1,GD2

C.B.

SW1

SW4 SW5 SW6 SW7

+3. For RP200

63H

TH3

TH4

(WHT

)

CN2

(WHT)

RED

Power Circuit Board Connection Terminal<U/V/W-Phase> Connection Terminal<L1/L2/L3-Power supply>

Connection Terminal Connection Terminal

Connection Terminal

52C Relay

Noise Filter Circuit Board Connection Terminal Connection Terminal Connection Terminal<Ground>

Controller Circuit Board Switch<Forced Defrost, Defect History Record Reset, Refrigerant Address> Switch<Test Operation> Switch<Function Switch> Switch<Model Select> Switch<Function Setup>

+3. For RP250

63H2

63H1

63H

(YLW)

P. B.

CN2

(WHT)

1 2

(RED)

BLK

TB-P1

CN4

CN5

X52A

DCL

+4. RP250 only

63L

(RED)

TB-P2

+5. RP200 RP250

LED2

LEV-A

LEV-A (WHT)

21S4

RED

5 LINE

6 LINE

+6.RP250 only

LEV-B

LED1

CN4

(WHT)

X52

21S4

(GRN)

CB1 CB2

CNVMNT

LEV-B

(WHT)

(RED)

(WHT)

X55

SV2

(BLU)

TB-C1 TB-N1

WHT

CNM

SC-W

SC-V

SC-U

CNMNT

(WHT)

TB-L3

TB-L2

TB-L1

BLK

141

1313

X51

(WHT)

SW5SW8SW4

SWP

SW8 SW9 SWP CN31 LED1,LED2 F3,F4 SS CNM CNMNT

CNVMNT

CNDM

CN3S CN51 X51,X52,X55

+1+

SW6SW1

CN31

CN3S

CNDM

CN51

BLK

WHT

RED

BLK

WHT

RED

Switch<Function Setup> Switch Switch<Pump Down> Connector<Emergency Operation> LED<Operation Inspection Indicators>

Fuse<T6.3AL250V

Connector<Connection for Option> Connector<A-Control Service Inspection Kit> Connector <Connected to Optional M-NET Adapter Board> Connector <Connected to Optional M-NET Adapter Board> Connector < Connected for Option (Contact Input)> Connector<Connection for Option> Connector<Connection for Option> Relay

SW7

SW9

(WHT)

When M-NET adapter is connected

SW1

CN5

ABS

(WHT)

LED2

LED3

LED4

M-NET SUBSTRATE

CND

CN2M

(WHT)

(WHT) 31

LED1

LED5

TB7

M-NET

SW11

SW12

M-NET ADAPTER

SYMBOL

TB7 CN5 CND CN2M SW1

SW11 SW12 LED1 LED2 LED3 LED4 LED5

Terminal Block(M-NET connection)

Connector<Transmission> Connector<Power Supply> Connector<M-NET communication>

Switch<Status of communication> Switch<Address setting:1st digit> Switch<Address setting:2nd digit> LED<Power Supply:DC5V> LED<Connection to Outdoor Unit> LED<Transmission:Sending> LED<Transmission:Receiving> LED<Power Supply:DC12V>

NAME

POWER SUPPLY 3N~ 400V 50Hz

NO FUSE BREAKER

TB1

RED

WHT

BLK

BLU

GRN/YLW

N. F.

CNAC1

(WHT)

LI 1

LI 2

LI 3

GD2GD1

BLK

CNDC (PNK)

BLK

CNCT (RED)

WHT

CNAC2

(RED)

3112

LO 1

RED

LO 2

WHT

LO3

BLK

1 MODEL SELECT

MODEL

200Y

CNL

(BLU)

WHT

ACL4

250Y

2. SW5 -1 to 5 : Function Switch

SW6

ON OFF

12345678

ON OFF

12345678

ON OFF

SW5-6+2

123456

Page 14

8 WIRING SPECIFICATIONS

8-1. FIELD ELECTRICAL WIRING (power wiring specifications)

P200, P250

Outdoor unit model RP200, 250 Outdoor unit Power supply Outdoor unit input capacity *1 Main switch (Breaker)

Wiring

Wire No. %

size(mm

Outdoor unit power supply 5 % Min. 4 Indoor unit-Outdoor unit *2 Cable length 50 m : 3 % 4 (Polar)/Cable length 80 m : 3 % 6 (Polar) Indoor unit-Outdoor unit earth 1 % Min. 2.5

)

Remote controller-Indoor unit *3 2 % 0.69 (Non-polar) Outdoor unit L1-N, L2-N, L3-N AC 220 - 230 - 240 V

Circuit rating

Indoor unit-Outdoor unit S1-S2 *4 AC 220 - 230 - 240 V Indoor unit-Outdoor unit S2-S3 *4 DC 24 V Remote controller-Indoor unit *4 DC 14 V

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV). *2. Max. 80 m Total Max. including all indoor/indoor connection is 80 m.

• Use one cable for S1 and S2 and another for S3 as shown in the picture.

• Max. 50m Total Max. for PEA-200, 250, 400, 500 Wiring size 3%1.5(Polar) *3. The 10 m wire is attached in the remote controller accessory. *4. The figures are NOT against the ground. S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Power supply cords and Indoor unit/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)

3. Use an earth wire which is longer than the other cords so that it will not become disconnected when tension is applied.

Phase Frequency & Voltage

380/400/415V 50Hz 3 phase(4 wires)

3N~(3ph 4-wires), 50 Hz,

380 - 400 - 415 V

32 A

Isolator

A-Control

Outdoor Unit

3 poles isolator

A-Control

Indoor Unit

Warning: In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.

Synchronized twin and triple system Electrical wiring

• Synchronized twin • Synchronized triple

Outdoor



Unit power supply

 Earth leakage breaker  Wiring circuit breaker or

isolating switch

Outdoor unit

unit

L1 L2



Indoor/outdoor unit connection cable

S1 S2 S3

Indoor unit

S1 S2 S3

Remote controller

Indoor unit

1 2

S1 S2 S3

Unit power supply



 Earth leakage breaker  Wiring circuit breaker or

isolating switch

Outdoor unit

L1 L2 L



Indoor/outdoor connection cable

S1 S2 S3

Indoor unit

S1 S2 S3

1 2

Remote controller

Indoor unit

1 2

S1 S2 S3

Indoor unit

1 2

S1 S2 S3

Page 15

S1 S2 S3

Indoor/outdoor unit connection cable

Indoor unit

Unit power supply

Outdoor unit No.1

L1 L2 L3



S1 S2 S3

L1 L2 L3

 Earth leakage breaker  Wiring circuit breaker or

isolating switch







S1 S2 S3

Indoor/outdoor unit connection cable

TB4-1

TB4-2

Unit power supply

Outdoor unit No.2

L2 L3



S1 S2 S3



1 2

Remote controller

1:1 System (Indoor : PEA-200, 250) 1:2 System (Indoor : PEA-400, 500)

Indoor unit

L1 L2 L3 N

S1 S2 S3



Remote controller

supply

Unit power



Unit power



supply

 Earth leakage breaker  Wiring circuit breaker or

isolating switch

Outdoor unit

L L2



Indoor/outdoor unit connection

cable S1 S2 S3

8-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

Simultaneous twin/triple/four system

The optional indoor power supply terminal kit is required.









S1 S2 S3





S1 S2 S3



L N

S1 S2 S3

1 2

* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

If the indoor and outdoor units have separate power supplies, refer to the table below. If the optional indoor power supply terminal kit is used, change the indoor unit electrical box wiring referring to the figure in the right and the DIP switch settings of the outdoor unit control board.

Indoor unit specifications Indoor power supply terminal kit (option) Indoor unit electrical box connector connection change Label affixed near each wiring diagram for the indoor and outdoor units Outdoor unit DIP switch settings (when using separate indoor unit/outdoor unit power supplies only)

ON OFF

Required

1 2 (SW8)

Electric heater (For models with heater)

Indoor unit power supplied from outdoor unit (when shipped from factory)

Connectors (connections when shipped from the factory are for indoor unit power supplied from outdoor unit.)

BLUE

YELLOW

CND

Set the SW8-3 to ON.

* There are 3 types of labels (Labels A, B, and C). Affix the appropriate labels to

the units according to the wiring method.

Indoor unit model Indoor unit power supply Indoor unit input capacity Main switch (Breaker)

Indoor unit power supply Indoor unit power supply earth

)

Indoor unit-Outdoor unit

(mm

Wiring

Indoor unit-Outdoor unit earth

Wire No. % size

Remote controller-Indoor unit

Indoor unit L-N *4

Indoor unit-Outdoor unit S1-S2 Indoor unit-Outdoor unit S2-S3

rating

Circuit

Remote controller-Indoor unit

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV). The breaker shall be provided to ensure disconnection of all active phase conductor of the supply. *2. Max. 120 m *3. The 10 m wire is attached in the remote controller accessory. Max. 500 m *4. The figures are NOT always against the ground.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Power supply cables and indoor unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable. (Design 60245 IEC 57)

3. Install an earth longer than other cables.

*4 *4 *4

RP35~140

~/N (single), 50 Hz, 230 V

16 A

2 % Min. 1.5 1 % Min. 1.5 2 % Min. 0.3

–

2 % 0.3 (Non-polar)

AC 230 V

– DC24 V DC12 V

control board

Outdoor unit power supply



Earth leakage breaker



Wiring circuit breaker or isolating switch



Outdoor unit



Indoor unit/outdoor unit connecting cales



Remote controller



Indoor unit



Option



Indoor unit power supply



ORANGE CND

Indoor unit

Electric heater (For models with heater)

Separate indoor unit/outdoor unit power supplies

If the indoor and outdoor units have separate power supplies, change the connections of the connectors as shown in the following figure.

BLUE

YELLOW

Connectors

CND

Indoor unit

control board

ORANGE CND

YELLOW

BLUE

Page 16

8-3. INDOOR – OUTDOOR CONNECTING CABLE

WIRING SPECIFICATIONS FOR 220-240 V 50 Hz (INDOOR-OUTDOOR CONNECTING CABLE)

Cross section of cable Wire size (mm2) Number of wires Polarity L (m)*6

Round

Flat

Round

2.5 3

1.5 4

2.5 4

Clockwise : S1-S2-S3 * Pay attention to stripe of yellow and green.

Not applicable (Because center wire has no cover finish)

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

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

Not applicable

(30)

(18)

(30)

*1 : Power supply cords of appliances shall not be lighter than design 60245 IEC or

227 IEC. *2 : In case that cable with stripe of yellow and green is available. *3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5 mm. *4 : In case of regular polarity connection (S1-S2-S3). *5 : In the flat cables are connected as this picture, they can be used up to 30 m.

Indoor/Outdoor separate power supply

Indoor unit-Outdoor unit

Indoor unit-Outdoor unit earth

*6 : Mentioned cable length is just a reference value.

It may be different depending on the condition of installation, humidity or materials, etc.

Wire No. % Size ($)

Max. 120m

2 % Min. 0.3

—

(3C Flat cable 2)

+ The optional indoor power supply terminal kit is necessary.

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections). Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point.

Page 17

8-4. M-NET WIRING METHOD

(Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from

making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube.

(2) Terminal block (TB7) for transmission wires should never be connected to 220~240V power supply. If it is connected,

electronic parts on M-NET P.C. board may burn out.

(3) Use 2-core x 1.25mm

received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this because this may cause a malfunction.

shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

Group remote controller

Power supply unit for transmission wire

Refrigerant address 00

M-NET address 01

A-control remote controller

Refrigerant address 00

M-NET address 02

Refrigerant address 00

M-NET address 03

A-control remote controller

It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.

(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to

the influence of electromagnetic noise. “Ed” error will appear on the LED display of outdoor unit. “0403” error will appear on the central-control remote controller.

Bad example (Multi spot grounding of shield wire)

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

Good example 1 (Single spot grounding of shield wire)

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

Good example 2 (Single spot grounding of shield wire)

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

If there are more than 2 grounding spots on the shield wire, noise may enter into the shield wire because the ground wire

and shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among grounding

spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield wire

do not form 1 circuit.

To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the

installation manual.

Page 18

ƔM-NET wiring

SW11 ones digit

SW12 tens digit

M-NET terminal block

M1 M2 S

Transmission

OFF

wire

Ground wire

Shield part

(1) Use 2-core x 1.25mm

shield wire for electric wires.

(Excluding the case connecting to system controller.)

(2) Connect the wire to the M-NET terminal block. Connect one core of the

transmission wire (non-polar) to M1 terminal and the other to M2. Peel the shield wire, twist the shield part to a string and connect it to S terminal.

(3) In the system which several outdoor units are being connected, the terminal

(M1, M2, S) on M-NET terminal block should be individually wired to the other outdoor unit’s terminal, i.e. M1 to M1, M2 to M2 and S to S. In this case, choose one of those outdoor units and drive a screw to fix an ground wire on the plate as shown on the right figure.

8-4-1. M-NET address setting

In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group.

Address number can be set by using rotary switches

M-NET Address No.

(SW11 for ones digit and SW12 for tens digit), which is located on the M-NET board of outdoor unit. (Initial setting: all addresses are set to “0”.)

Switng setting

8-4-2. Refrigerant address setting

In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group setting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller board. [Initial setting: all switches are OFF. (All refrigerant addresses are “00”.)]

Refrigerant address

OFF

8-4-3. Regulations in address settings

In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above section. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.

Group A Group B Group C

System controller

Power supply unit for transmission wire

Refrigerant address 00

M-NET address 01

A-control remote controller

+ Refrigerant addresses can be overlapped if they are in the different group.

Group A Group B

System controller

Power supply unit for transmission wire

Refrigerant address 00

M-NET address 01

A-control remote controller

Refrigerant address 00

M-NET address 02

A-control remote controller

Refrigerant address 01

M-NET address 02

Refrigerant address 01

M-NET address 03

TB5

A-control remote controller

Refrigerant address 00

M-NET address 04

Refrigerant address 00

M-NET address 04

A-control remote controller

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

+ In group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As

“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in the group for the outdoor unit whose refrigerant address is “00”.

Page 19

9 REFRIGERANT SYSTEM DIAGRAM

Unit : mm

PUHZ-RP200YHA2

Ball valve

Refrigerant GAS pipe :25.4(:1 inch)

Refrigerant LIQUID pipe :9.52(:3/8 inch)

Strainer

(#50)

Service port (check)

Accumulator

Stop valve (with service port)

Strainer (#40)

4-way valve

Strainer (#100)

Restrictor valve

Strainer (#100)

Muffler

Compressor

Linear expansion valve

Outdoor heat exchanger

High pressure switch(63H)

Service port (check)

Thermistor (TH4)

Refrigerant flow in cooling

Refrigerant flow in heating

Distributor

Strainer (#100)

Thermistor (TH7)

Thermistor (TH6)

Thermistor (TH3)

PUHZ-RP250YHA2

Ball valve

Refrigerant GAS pipe :25.4(:1 inch)

Stop valve (with service port)

Refrigerant LIQUID pipe :12.7(:1/2 inch)

High pressure switch(63H2)

Strainer (#50)

Service port (check)

Strainer (#100)

Linear expansion valve B

Strainer (#100)

Power receiver

Restrictor valve

Capillary tube

O.D.4.0I.D.3.0L500

4-way valve

Low pressure switch(63L)

Linear expansion valve A

Muffler

Compressor

Replace filter

High pressure switch (63H1)

Service port (check)

Bypass valve

Heat exchanger

Thermistor (TH4) (Discharge)

Strainer (#100)

Thermistor (TH7)

Thermistor (TH6)

Thermistor (TH3)

Distributor

Replace filter

Bypass valve

Page 20

OFF

<SW4>





 Stop  Operation  Cooling  Heating

9-1. Refrigerant recovering (pump down)

Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit. Turn on the power supply (circuit breaker).

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

“CENTRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally. After 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 fans (indoor and outdoor units) start operating and refrigerant recovering operation begins. LED1 and LED2 on the control board of the outdoor unit are lit. +Set the SWP switch (push-button type) to ON in order to perform refrigerant recovering operation only when the unit is

stopped. However, refrigerant recovering operation cannot be performed until compressor stops even if the unit is stopped. Wait 3 minutes until compressor stops and set the SWP switch to ON again. Because the unit automatically stops in about 2 to 3 minutes after the refrigerant recovering operation (LED1 is not lit

and LED2 is lit), be sure to quickly close the gas stop valve. +In 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 minutes later.

+If the refrigerant recovering 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. Turn off the power supply (circuit breaker.)

9-2. Unit replacement operation

When reusing the existing pipes that carried R22 refrigerant for the RP200 and RP250 models, replacement operation must be performed before performing a test run.

If new pipes are used, these procedures are not necessary. During replacement operation, “C5” is displayed on “A-Control Service Tool(PAC-SK52ST)”.

Replacement operation procedures

Turn on the power supply. Set 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 replace-

ment operation.

TEST RUN

• During the replacement operation,

control board of the outdoor unit blink together.

The duration of the replacement operation is determined by the length of the piping. Always perform the replacement



operation for longer than the stipulated time.

* Use one of he following methods to complete replacement operation. When the replacement operation ends, the unit will

automatically stop.

(1)Set SW8-2 from ON to OFF. (When ending a replacement operation of

less than 2 hours.)

• Each time SW8-2 is set from OFF to ON, the replacement operation can

be started. Always perform the replacement operation for longer than the stipulated time.

(2) The replacement operation will automatically stop after 2 hours. (It will end with SW8-2 still in the ON position.)

• When the replacement operation has ended automatically after 2 hours of operation, there is no need to set SW8-2 from

ON to OFF; normal air conditioning operations can be started with the SW8-2 being set to ON. However, to repeat the replacement operation, SW8-2 will have to be returned to OFF and then set to ON.

,IWKHLQGRRUWHPSHUDWXUHLVEHORZÛ&WKHFRPSUHVVRUZLOORSHUDWHLQWHUPLWWHQWO\EXWWKHXQLWLVQRWIDXOW\

is displayed on the remote controller and LED1 (green) and LED2 (red) on the

Piping Length

0 to 20 meters 30 minutes or more 21 to 30 meters 45 minutes or more 31 to 70 meters 60 minutes or more

"Replacement

Operation Time"

9-3. 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.

Set the operation mode (cooling/heating) using SW4-2. Turn on SW4-1 to start test run with the operation mode set by SW4-2. Turn 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 valve 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 since 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.)

Page 21

10 TROUBLESHOOTING

10-1. 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 trouble is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.

Unit conditions at service

The trouble is reoccurring.

The trouble is not reoccurring.

Error code

Displayed

Not displayed

Logged

Not logged

Actions to be taken for service (summary)

Judge what is wrong and take a corrective action according to “10-4. Self-diagnosis action table”.

Conduct troubleshooting and ascertain the cause of the trouble according to “10-5. Troubleshooting by inferior phenomena”.

Consider 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 trouble occurred, matters related to wiring and etc. Reset error code logs and restart the unit after finishing service. There is no abnormality in electrical component, controller board, remote controller and etc.

Re-check the abnormal symptom. Conduct trouble shooting and ascertain the cause of the

trouble phenomena”. Continue to operate unit for the time being if the cause is not ascertained. There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

according to “10-5. Troubleshooting

by inferior

10-2. CHECK POINT UNDER TEST RUN

(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 Megger and

check that it is 1.0M or over.

+Don’t use 500V Megger 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.

• Turn on power supply 12 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 “11. Function setting”.

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

Page 22

"TEST RUN" and the currently selected operation mode are displayed altemately.

Displays the remaining test run time.





[TEST] button



Pipe (liquid) temperature

Operating procedures

1. Turn on the main power supply.

2. Press TEST button twice.

3. Press OPERATION SWITCH button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for correct running.

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

7. Register the contact number.







While the room temperature display on the remote controller is “PLEASE WAIT”, the remote controller is disabled. Wait until “PLEASE WAIT” disappears before using remote controller. “PLEASE WAIT” appears for about 2 minutes after power supply is turned on. +1

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.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 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, triple and quadruple operation. Malfunctions may not be displayed regardless of incorrect wiring. +1 After turning on the power supply, the system will go into startup mode, “PLEASE WAIT” will blink on the display section

of the room temperature, and lamp(green) of the remote controller will blink. As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either 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 be lit 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 +1 written above.

Symptoms in test run mode

Remote Controller Display

Remote controller displays “PLEASE WAIT”, and

After power is turned on, “PLEASE WAIT” 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.

+Press the remote controller’s

LCD

P1 P2 P4 P5 P6 P8 P9 Fb

cannot be operated.

CHECK

Contents of trouble

Abnormality of room temperature thermistor Abnormality of pipe temperature thermistor/Liquid Abnormality of drain sensor/ Float switch connector open Drain overflow protection is working. Freezing/overheating protection is working. Abnormality of pipe temperature Abnormality of pipe temperature thermistor/Cond./Eva Abnormality of indoor controller board

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, F5, F9> After “startup” is displayed,

green(twice) and red(once) blink alternately. <EA. Eb>

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

• After power is turned on, “PLEASE WAIT” is displayed for 2 minutes during

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

• Outdoor unit’s protection device connector is open.

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

• Remote controller transmission wire is short.

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

• Remote controller transmission wire is open.

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

system startup. (Normal)

button twice to perform self-diagnosis. See the table below for the contents of LCD dis-

LCD

Malfunction outdoor unit

U1~UP

Malfunction

F3~F9 E0~E5

Remote controller transmitting error

E6~EF

Indoor/outdoor unit communication error No error history

---No applied unit

FFFF

Forced compressor stop(due to water leakage abnormality)

outdoor unit

Contents of trouble

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

(microcomputer power supply)

LED1

(remote controller)

LED2

(indoor/outdoor communication)

LED3

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

Blinks when indoor and outdoor unit are communicating.

Cause

1, L2, L3 and

Page 23



TEST RUN

MODE

HEAT

FAN

VANE

,



ON/OFF

MODE

CHECK

TEST RUN

SET

TEST RUN

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

min





Test run [for wireless remote controller]

Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M.

 Turn on the main power to the unit.

 Press the

(Start this operation from the status of remote controller display turned off.)

and current operation mode are displayed.

 Press the

check whether cool air is blown out from the unit.

 Press the

check whether warm air is blown out from the unit.

 Press the

from the unit.

 Press the

properly.

 Press the ON/OFF button to stop the test run.

Note:

• Point the remote controller towards the indoor unit receiver

while following steps  to .

• It is not possible to run in FAN, DRY or AUTO mode.

button twice continuously.

( ) button to activate

COOL

mode, then

button and check whether strong air is blown out

button and check whether the auto vane operates

Page 24

10-3. HOW TO PROCEED "SELF-DIAGNOSIS"















10-3-1. When a Problem Occurs During Operation

If a problem occurs in the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display.

 [CHECK] and the refrigerant address are displayed on the temperature display, and the error code and unit number are displayed alternately as shown below. (If the outdoor unit is malfunctioning, the unit number will be "00".)

 In the case of group control, for which one remote controller controls multiple refrigerant systems, the refrigerant address and error code of the unit that first experienced trouble (i.e., the unit that transmitted the error code) will be displayed.

 To clear the error code, press the button.

Error code (2 or 4 digits)

ON/OFF

(Alternating Display)

Address (3 digits) or unit number (2 digits)





When using remote-/local-controller combined operation, cancel the error code after turning off remote operation. During

central control by a MELANS controller, cancel the error code by pressing the

ON/OFF

button.

10-3-2. Self-Diagnosis During Maintenance or Service

Since each unit has a function that stores error codes, the latest check code can be recalled even if it is cancelled by the remote controller or power is turned off.



Check the error code history for each unit using the remote controller.



Switch to self-diagnosis mode.



Press the will change as shown below.

CHECK

button twice within 3 seconds. The display content

Unit number or refrigerant address to be diagnosed

Set the unit number or refrigerant address you want to diagnose.



Press the [TEMP] buttons ( and ) to select the desired number or address. The number (address) changes between [01] and [50] o r [00]

an d

[15].

The refrigerant address will begin to blink approximately 3 seconds after being selected and the self-diagnosis process will begin.



Display self-diagnosis results.

(Alternating Display)

Error code (2 or 4 digits)

Address (3 digits) or unit number (2 digits)



Reset the error history.

Display the error history in the diagnosis result display screen (see step



Page 25



CHECK

Press the

address or refrigerant address will blink.



Cancel self-diagnosis. Self-diagnosis can be cancelled by the following 2 methods.



Press the



Press the

ON/OFF

CHECK

ON/OFF

button twice within 3 seconds. The self-diagnosis

button twice within 3 seconds.  Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the

button.  Self-diagnosis will be cancelled and the indoor unit will stop.

start of self-diagnosis.

When the error history is reset, the display will look like the one shown below. However, if you fail to reset the error history, the error content will be displayed again.

10-3-3. Remote Controller Diagnosis

If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.



First, check that the power-on indicator is lit. If the correct voltage (DC12 V) is not supplied to the remote controller, the indicator will not light. If this occurs, check the remote controller's wiring and the indoor unit.

Power on indicator



Switch to the remote controller self-diagnosis mode.



Press the

will change as shown below.

CHECK

button for 5 seconds or more. The display content



Press the

FILTER

button to start self-diagnosis.



Remote controller self-diagnosis result

[When the remote controller is functioning correctly]

Check for other possible causes, as there is no problem with the remote controller.

[Where the remote controller is not defective, but cannot be operated.] (Error display 2) [E3], [6833] or [6832] blinks.

There might be noise or interference on the transmission path, or the indoor unit or other remote controllers are defective. Check the transmission path and other controllers.

[When the remote controller malfunctions] (Error display 1) "NG" blinks. ©The remote controller's transmitting-receiv-

The remote controller must be replaced with a new one.

(Error display 3)

The number of data errors is the difference between the number of bits sent from the remote controller and the number actually transmitted through the transmission path. If such a problem is occurring, the transmitted data is affected by noise, etc. Check the transmission path.

ing circuit is defective.

"ERC" and the number of data errors are displayed. © Data error has occurred.

When the number of data errors is "02":

Transmission data from remote controller

Transmission data on transmission path



To cancel remote controller diagnosis



Press the approximately 30 seconds, the state in effect before the diagnosis will be restored.

button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will blink. After

Page 26

10-3-4. Malfunction-diagnosis method by wireless remote controller

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]

CHECK display

ON/OFF button

CHECK button

ON/OFF

MODE

CHECK

TEST RUN

SET

CHECK

FAN

VANE

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

CLOCK

min

Refrigerant address display

Temperature button

HOUR button

1. Press the CHECK button twice.

2. Press the temperature buttons.

3. Point the remote controller at the

sensor on the indoor unit and press the HOUR button.

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

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

• 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.)

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

4. Point the remote controller at the

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

• The check mode is cancelled.

Page 27

• Refer to the following tables for details on the check codes. [Output pattern A]

Beeper sounds

OPERATION INDICATOR lamp blink pattern

Beep

Self-check starts (Start signal received)

Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “P5”)

0.5 sec.

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

[Output pattern B]

Beeper sounds

OPERATION INDICATOR lamp blink pattern

Beep Beep Beep Beep Beep

1st2nd3

Off

Self-check starts (Start signal received)

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “U2”)

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

(Number of times)

1P1

P2 Pipe (TH2) sensor error P9 Pipe (TH5) sensor error

3 E6,E7

Intake sensor error

Indoor/outdoor unit communication error

4 P4 Drain sensor error/Float switch connector open

P5 Drain pump error

PA Forced compressor stop(due to water leakage abnormality) 6 P6 Freezing/Overheating protection operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error 9 E4, E5 Remote controller signal receiving error

10 11

–

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

Remote controller transmission error

– E1, E2 Remote controller control board error

1st2

Off

Number of blinks/beeps in pattern indicates the check code in the following table

0.5 sec.

· · · Repeated

Beep Beep

1st2

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table

· · · Repeated

Symptom Remark

As for indoor unit, refer to indoor unit's service manual.

[Output pattern B]

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

Errors detected by unit other than indoor unit (outdoor unit, etc.)

Wired remote controller

Symptom Remark

(Number of times)

2 3 4

7 8 9

12 13 14

UP U3,U4 UF U2

U1,Ud

U5 U8 U6 U7

U9,UH

– –

Others

*1 If the beeper does not sound again after the initial

the OPERATION INDICATOR lamp does not come on,

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

Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharging temperature/insufficient refrigerant Abnormal high pressure (63H worked)/Overheating

protection operation

Abnormal temperature of heatsink

Outdoor unit fan protection stop

Compressor overcurrent interruption/Abnormality of power module Abnormality of superheat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and

abnormal synchronous signal to main circuit/Current sensor error

–

– Other errors (Refer to the technical manual for the outdoor unit.)

2 beeps to confirm the self-check start signal was received and

there are no error records.

For details, check the LED display of the outdoor controller board.

*2 If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm

the self-check start signal was received, the specified refrigerant address is incorrect.

Page 28

10-4. SELF-DIAGNOSIS ACTION TABLE

Error Code

Abnormal point and detection method

 No voltage is supplied to terminal

block(TB1) of outdoor unit. a) Power supply breaker is

b) Contact failure or disconnec-

c) Open phase (L2 or N phase)

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

Case

 Check following items.

a) Power supply breaker b), c) Connection of power supply terminal

turned off.

tion of power supply terminal

Judgment and action

block(TB1)

None —

63L connector open

Abnormal if 63L connector circuit is open for 3 minutes continuously after power supply.

(5202)

63L: Low-pressure switch <RP250 only>

 Electric power is not supplied to

outdoor controller circuit board. a) Disconnection of connector

(CNDC)

 Disconnection of reactor

(ACL4)

 Disconnection of outdoor noise

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

 Defective outdoor controller

circuit board

 Disconnection or contact failure

of 63L connector on outdoor controller circuit board.

 Disconnection or contact failure

of 63L.

 63L is working due to refriger-

ant leakage or defective parts.

 Defective outdoor controller

circuit board.

 Check connection of the connector (CNDC)

on the outdoor controller circuit board. Check connection of the connector CNDC on the outdoor noise filter circuit board. Refer to 10-9.

 Check connection of reactor. (ACL4)

 a) Check connection of outdoor noise filter

circuit board. b) Replace outdoor noise filter circuit board.

Refer to 10-9.

 Replace controller board (When items above

are checked but the units cannot be repaired).

 Check connection of 63L connector on

outdoor controller circuit board. Refer to 10-9.

 Check the 63L side of connecting wire.

 Check refrigerant pressure.

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

 Replace outdoor controller circuit board.

(5201)

(4119)

63H connector open

Abnormal if 63H connector circuit is open for 3 minutes continuously after power supply. 63H: High-pressure switch

2 connector open

Abnormal if both 63H and 63L connector circuits are open for 3 minutes continuously after power supply.

63H: High-pressure switch 63L: Low-pressure switch <RP250 only>

 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

 Disconnection or contact failure

of 63H

 63H is working due to defective

parts.

 Defective outdoor controller

circuit board

 Disconnection or contact failure

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

 Disconnection or contact failure

of 63H, 63L.

 63H and 63L are working due

to defective parts.

 Defective outdoor controller

circuit board.

 Check connection of 63H connector on

outdoor controller circuit board. Refer to 10-9.

 Check the 63H side of connecting wire.

 Check continuity by tester.

Replace the parts if the parts are defective.

 Replace outdoor controller circuit board.

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

outdoor controller circuit board. Refer to 10-9.

 Check the 63H and 63L side of connecting

wire.

 Check continuity by tester.

Replace the parts if the parts are defective.

 Replace outdoor controller circuit board.

Page 29

Error Code

(6844)

(6845)

Abnormal point and detection method

Indoor/outdoor unit connector miswiring, excessive number of units

1. Outdoor controller circuit board can automatically check the number of connected indoor units. Abnormal if the

number cannot be checked automatically due to miswiring of indoor/outdoor unit connecting wire and etc. after power is turned on for 4 minutes.

2. Abnormal if outdoor controller circuit

board recognizes excessive number of indoor units.

Miswiring 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 cannot be set within 4 minutes after power on because of miswiring (converse wiring or disconnection) of indoor/outdoor unit connecting wire.

Case

 Contact failure or miswiring of

indoor/outdoor unit connecting wire

 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

 Excessive number of indoor

units are connected to 1 outdoor unit.(5 units or more)

 Defective transmitting receiving

circuit of outdoor controller circuit board

 Defective transmitting receiving

circuit of indoor controller board

 Defective indoor power board  2 or more outdoor units have

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

 Noise has entered into power supply or indoor / outdoor unit connecting wire.

 Contact failure or miswiring of

indoor/outdoor unit connecting wire

 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

 Defective transmitting receiving

circuit of outdoor controller circuit board

 Defective transmitting receiving

circuit of indoor controller board

 Defective indoor power board  2 or more outdoor units have

refrigerant address “0”.

(In case of group control)  Noise has entered into power

supply or indoor/outdoor unit connecting wire.

Judgment and action

 Check disconnection or looseness or polar-

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

 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.

 Check the number of indoor units that are

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

~ Turn 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.

 Check if refrigerant addresses (SW1-3 to

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

 Check transmission path, and remove the

cause.

+ The descriptions above, -, are for EA, Eb

and EC.

(6846)

Start-up time over

The unit cannot finish start-up process within 4 minutes after power on.

 Contact failure of indoor/

outdoor unit connecting wire

 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

 2 or more outdoor units have

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

 Noise has entered into power

supply or indoor/outdoor unit connecting wire.

Page 30

Error Code

(1302)

Abnormal point and detection method

High pressure (High-pressure switch 63H(RP200)/63H1 or 63H2(RP250) worked)

Abnormal if high-pressure switch 63H(RP200)/63H1 or 63H2(RP250) worked ( + ) during compressor operation. + 63H1: 4.15 MPa 63H, 63H2: 3.6 MPa

63H, 63H1, 63H2: High-pressure switch

Case

 Short cycle of indoor unit  Clogged filter of indoor unit  Decreased airflow caused by

dirt of indoor fan

 Dirt of indoor heat exchanger  Locked indoor fan motor  Malfunction of indoor fan motor  Defective operation of stop

valve (Not fully open)

 Clogged or broken pipe  Locked outdoor fan motor

 Malfunction of outdoor fan

motor

 Short cycle of outdoor unit  Dirt of outdoor heat exchanger  Decreased airflow caused by

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

 Disconnection or contact failure

of connector (63H) on outdoor controller board

 Disconnection or contact failure

of 63H connection

 Defective outdoor controller

board

 Defective action of linear

expansion valve

 Malfunction of fan driving

circuit

Judgment and action

~Check indoor unit and repair defect.

 Check if stop valve is fully open.

 Check piping and repair defect. ~ Check outdoor unit and repair defect.

 Check the inspected temperature of outside

temperature thermistor on LED display. (SW2 on A-Control Service Tool : Refer to 10-10.)

~Turn the power off and check F5 is

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

 Check linear expansion valve.

Refer to 10-7.

 Replace outdoor controller board.

(1102)

(5104)

High discharging temperature

(1) Abnormal if discharge temperature ther-

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

(2) Abnormal if discharge superheat

(Cooling: TH4 – TH5 / Heating: TH4 – TH6) exceeds 70 continuously for 10 minutes.

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.)

.

 Overheated compressor opera-

tion caused by shortage of refrigerant

 Defective operation of stop

valve

 Defective thermistor  Defective outdoor controller

board

 Defective action of linear

expansion valve

Clogging with foreign objects in

refrigerant circuit

+Clogging occurs in the parts

which become below freezing point when water enters in refrigerant circuit.

 Disconnection or contact

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

 Defective thermistor

 Defective outdoor controller

circuit board

 Check intake superheat.

Check leakage of refrigerant. Charge additional refrigerant.

 Check if stop valve is fully open.

 Turn the power off and check if U3 is dis-

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

 Check linear expansion valve.

Refer to 10-7.

 After recovering refrigerant, remove water

from entire refrigerant circuit under vacuum more than 1 hour.

 Check connection of connector (TH4) on the

outdoor controller circuit board. Check breaking of the lead wire for thermistor (TH4). Refer to 10-9.

 Check resistance value of thermistor (TH4) or

temperature by microcomputer. (Thermistor/TH4: Refer to 10-7.) (SW2 on A-Control Service Tool: Refer to 10-10.)

 Replace outdoor controller board.

Page 31

Thermistors

Open detection Short detection

Symbol

Name TH3 TH6 TH7 TH8

– 40 or below – 40 or below – 40 or below – 35 or below

90 or above 90 or above 90 or above 170or above

Thermistor <Outdoor pipe>

Thermistor <Outdoor 2-phase pipe>

Thermistor <Outdoor>

Thermistor <Heatsink>

Error Code

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

Abnormal point and detection method

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 are inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting. Check which unit has abnormality in its

thermistor by switching the mode of SW2. (PAC-SK52ST) (Refer to 10-10.)

Heatsink thermistor(TH8) is in the power

module.

Case

 Disconnection or contact failure

of connectors Outdoor controller circuit

(

board: TH3,TH7/6

 Defective thermistor

 Defective outdoor controller

circuit board

 Defective outdoor power circuit

board (TH8 open/ short)

)

Judgment and action

 Check connection of connector (TH3,TH7/6) on

the outdoor controller circuit board. Check breaking of the lead wire for thermistor (TH3,TH6,TH7). Refer to 10-9.

 Check resistance value of thermistor

(TH3,TH6,TH7) or check temperature by microcomputer. (Thermistor/TH3,TH6,TH7 : Refer to 10-7.) (SW2 on A-Control Service Tool: Refer to 10-10.)

 Replace outdoor controller circuit board.

Replace outdoor power circuit board.

Emergency operation is available in case of abnormalities of TH3, TH6 and TH7. Refer to 10-8.

Temperature of heatsink

Abnormal if heatsink thermistor(TH8) detects temperature 95. +Heatsink thermistor is in the power mod-

ule.

(4230)

Power module

Check abnormality by driving power module in case overcurrent is detected.

(4250)

(4400)

(UF or UP error condition)

Outdoor fan motor

The outdoor fan motor is considered to be abnormal if the rotational frequency of fan motor is abnormal when detected during operation. Fan motor rotational frequency is abnormal if;

• 100 rpm or below detected continuously

for 15 seconds at 20 or more outside air temperature.

• 50 rpm or below or 1500 rpm or more detected continuously for 1 minute.

 The outdoor fan motor is

locked.

 Failure of outdoor fan motor  Air flow path is clogged.  Rise of ambient temperature

 Defective thermistor

 Defective input circuit of

outdoor power circuit board

 Failure of outdoor fan drive circuit

 Outdoor stop valve is closed.  Decrease of power supply voltage  Looseness, disconnection or

converse of compressor wiring connection

 Defective compressor  Defective outdoor power circuit

board

 Failure in the operation of

the DC fan motor

 Failure in the outdoor circuit

controller board

 Check outdoor fan.

 Check air flow path for cooling.  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.  Check temperature(TH8) by microcomputer.

(SW2 on A-Control Service Tool: Refer to 10-10.)

 Replace outdoor power circuit board.

 Replace outdoor controller circuit board.

 Open stop valve.  Check facility of power supply.  Correct the wiring (U·V·W phase) to

compressor. Refer to 10-9 (Outdoor power circuit board).

 Check compressor referring to 10-6.  Replace outdoor power circuit board.

 Check or replace the DC fan motor.

 Check the voltage of the outdoor circuit

controller board during operation.

 Replace the outdoor circuit controller

board. (When the failure is still indicated even after performing the remedy above.)



Page 32

Error Code

(4220)

(1504)

Abnormal point 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;

• Instantaneous decrease of DC bus volt-

age to 400V

• Increase of DC bus voltage to 760V

• 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.

Overheat protection

Abnormal if outdoor pipe thermistor (TH3) detects 70or more during compressor operation.

Case

 Decrease of power supply voltage  Disconnection of compressor

wiring

 Defective 52C drive circuit of

outdoor power circuit board

 Disconnection or loose con-

nection of CN5 on the outdoor power circuit board

 Disconnection or loose con-

nection of CN2 on the outdoor power circuit board

 Defective outdoor controller cir-

cuit board

Defective outdoor fan (fan



motor) or short cycle of outdoor unit during cooling operation

 Defective outdoor pipe ther-

mistor (TH3)



Defective outdoor controller board

Judgment and action

 Check the facility of power supply.  Correct the wiring (U·V·W phase) to compressor.

Refer to 10-9 (Outdoor power circuit board).

 Replace outdoor power circuit board.

 Check CN5 wiring on the outdoor power

circuit board. Refer to 10-9.

 Check CN2 wiring on the outdoor power

circuit board. Refer to 10-9.

 Replace outdoor controller circuit board.

 Check outdoor unit air passage.

 Turn the power off and on again to check

the error code. If U4 is displayed, follow the U4 processing direction.

(4100)

(5300)

(1300)

Compressor overcurrent interruption (When compressor locked)

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

Compressor current sensor error or input current error

Abnormal if compressor current sensor detects –1.0A to 1.0A within 3 minutes after compressor starts operating. (This error is ignored in case of test run mode.)

Low pressure(RP200)

Abnormal if the following conditions are detected for continuously 1-3 minutes after compressor starts heating operation for 5 minutes.

1. Heating mode

Detection mode1 TH7-TH34 and TH5-Indoor room temperature2

Detection mode2 TH7-TH32and TH5-Indoor room temperature4 and TH2-Indoor room temperature4

2.Cooling mode

TH6-TH72 and TH3-TH72and Indoor room temperature - Indoor liquid pipe temperature (TH2)5



Thermistor TH3 : Outdoor liquid pipe temperature TH5 : Indoor cond./eva. temperature TH6 : Outdoor 2-phase pipe temperature TH7 : Outdoor temperature

 Stop valve is closed. 

Decrease of power supply voltage

 Looseness, disconnection or

converse of compressor wiring

connection

 Defective compressor

 Defective outdoor power board  Dip switch setting difference of

outdoor controller circuit board

 Disconnection of compressor

wiring

 Defective circuit of current

sensor on outdoor power circuit board

 Stop valve of outdoor unit is

closed during operation.

 Leakage or shortage of refrigerant

 Malfunction of linear expansion

valve

Clogging with foreign objects in

refrigerant circuit

+Clogging occurs in the parts

which become below freezing point when water enters in refrigerant circuit.

 Open stop valve.  Check facility of power supply. Correct the wiring (U·V·W phase) to

compressor. Refer to 10-9 (Outdoor power circuit board).

 Check compressor.

Refer to 10-6.

 Replace outdoor power circuit board. Check the dip switch setting of outdoor con-

troller circuit board.

 Correct the wiring (U·V·W phase) to compressor. Refer to 10-9 (Outdoor power circuit board).

 Replace outdoor power circuit board.

Check stop valve.

 Check intake superheat.

Check leakage of refrigerant. Check additional refrigerant.

Check linear expansion valve.

Refer to 10-7.

 After recovering refrigerant, remove water

from entire refrigerant circuit under vacuum more than 1 hour.

Page 33

Error Code

(1300)

(4210)

Abnormal point and detection method Judgment and action

Low pressure (63L worked)(RP250)

Abnormal if 63L is worked (under

-0.03MPa) during compressor operation. 63L: Low-pressure switch

Compressor overcurrent interruption

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

 Stop valve of outdoor unit is

closed during operation.

 Disconnection or loose con-

nection of connector (63L) on outdoor controller circuit board

 Disconnection or loose connec-

tion of 63L

 Defective outdoor controller cir-

cuit board



Leakage or shortage of refrigerant

 Malfunction of linear expansion

valve

 Stop valve of outdoor unit is

closed.

 Decrease of power supply volt-

age

 Looseness, disconnection or

converse of compressor wiring connection

 Defective fan of indoor/outdoor

units

 Short cycle of indoor/outdoor

units

 Defective input circuit of out-

door controller board

 Defective compressor  Defective outdoor power circuit

board

 Dip switch setting difference of

outdoor controller circuit board

Case

 Check stop valve.

~ Turn the power off and on again to check

if F3 is displayed on restarting. If F3 is displayed, follow the F3 process-

ing direction.

 Correct to proper amount of refrigerant.  Check linear expansion valve.

Refer to 10-7.

 Open stop valve.

 Check facility of power supply.

 Correct the wiring (U·V·W phase) to com-

pressor. Refer to 10-9 (Outdoor power circuit board).

 Check indoor/outdoor fan.  Solve short cycle.  Replace outdoor controller circuit board.

Before the replacement of the outdoor control-

ler 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.

 Check compressor. Refer to 10-6.  Replace outdoor power circuit board. Check the dip switch setting of outdoor con-

troller circuit board.

Remote controller transmission error(E0)/signal receiving error(E4)

 Abnormal if main or sub remote con-

troller cannot receive any transmission normally from indoor unit of refrigerant address “0” for 3 minutes. (Error code : E0)

 Abnormal if sub-remote controller could

not receive any signal for 2 minutes. (Error code: E0)

 Abnormal if indoor controller board can

not receive any data normally from

remote controller board or from other indoor controller board for 3 minutes. (Error code: E4)

 Indoor controller board cannot receive

any signal from remote controller for 2 minutes. (Error code: E4)

Remote controller control board

 Abnormal if data cannot be read nor-

mally from the nonvolatile memory of the remote controller control board.

(Error code: E1)

 Abnormal if the clock function of remote

controller cannot be operated normally.

(Error code: E2)

 Contact failure at transmission

wire of remote controller

 All remote controllers are set

as “sub” remote controller. In this case, E0 is displayed on remote controller, and E4 is displayed at LED (LED1, LED2) on the outdoor controller circuit board.

 Miswiring of remote controller  Defective transmitting receiving

circuit of remote controller

 Defective transmitting receiv-

ing circuit of indoor controller board of refrigerant address “0”

 Noise has entered into the

transmission wire of remote controller.

 Defective remote controller  Replace remote controller.

 Check disconnection or looseness of indoor

unit or transmission wire of remote controller.

 Set one of the remote controllers “main”, if

there is no problem with the action above.

 Check wiring of remote controller.

• Total wiring length: max. 500m (Do not use cable × 3 or more.)

• The number of connecting indoor units: max. 16 units

• The number of connecting remote controller: max. 2 units

When the above-mentioned problem of ~ are not applied  Diagnose remote controllers.

a) When “RC OK” is displayed, remote con-

trollers have no problem.

Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board.

b) When “RC NG” is displayed, replace

remote controller. c) When “RC E3” is displayed, d) When “ERC 00-06” is displayed,

>FGĺ1RLVHPD\EHFDXVLQJDEQRUPDOLW\@

; If the unit is not normal after replacing

indoor controller board in group control,

indoor controller board of address “0” may

be abnormal.

Page 34

Error Code

(6840)

(6841)

(6607

6608)

Abnormal point and detection method Judgment and action

Remote controller transmission error(E3)/signal receiving error(E5)

 Abnormal if remote controller could not

find blank of transmission path for 6 seconds and could not transmit.

(Error code: E3)  Remote controller receives transmitted

data at the same time, compares the data, and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E3)

 Abnormal if indoor controller board could

not find blank of transmission path.

(Error code: E5)  Indoor controller board receives trans-

mitted data at the same time, compares the data,and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E5)

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

(1) Abnormal if outdoor controller circuit

board could not receive anything normally for 3 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 3 minutes.

Non defined error code

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

 2 remote controllers are set as

“main.” (In case of 2 remote controllers)

 Remote controller is connected

with 2 indoor units or more.

 Repetition of refrigerant

address

 Defective transmitting receiving

circuit of remote controller

 Defective transmitting receiv-

ing circuit of indoor controller board

 Noise has entered into trans-

mission wire of remote controller.

 Contact failure of indoor/out-

door unit connecting wire

 Defective communication cir-

cuit of outdoor controller circuit board

 Defective communication circuit

of indoor controller board

 Noise has entered into indoor/

outdoor unit connecting wire.

 Indoor/ outdoor unit connecting

wire has contact failure.

 Defective communication cir-

cuit of outdoor controller circuit board

 Noise has entered power sup-

ply.

 Noise has entered indoor/ out-

door unit connecting wire.

 Noise has entered transmission

wire of remote controller.

 Noise has entered indoor/ out-

door unit connecting wire.

 Outdoor unit is not a inverter

models.

 Model name of remote control-

ler is PAR-S25A.

Case

 Set a remote controller to main, and the

other to sub.

 Connect remote controller with only one

indoor unit.

 Change the address to a separate setting.

~Diagnose remote controller.

a) When “RC OK” is displayed, remote con-

trollers have no problem. Turn the power off, and on again to check. When becoming abnormal again, 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 abnormal-

ity.

 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor or outdoor units.

~ Turn the power off, and on again to

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

 Check disconnection or looseness of indoor/

outdoor unit connecting wire.

~ Turn the power off, and on again to

check. Replace outdoor controller circuit board if abnormality is displayed again.

 Turn the power off, and on again to check.

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

 Replace outdoor unit with inverter type out-

door unit.

 Replace remote controller with MA remote

controller.

(0403)

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.

 Breaking of wire or contact

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

 Breaking of wire or contact

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

 Defective communication circuit

of outdoor power circuit board

 Defective communication cir-

cuit of outdoor controller circuit board for outdoor power circuit board

 Breaking of wire or contact

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

 Contact failure of M-NET board

power supply line

 Noise has entered into M-NET

transmission wire.

 Check connection of each connector CN2

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

 Replace outdoor power circuit board.

 Replace outdoor controller circuit board.

 Check disconnection, looseness, or breaking

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

 Check disconnection, looseness, or breaking

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

 Check M-NET transmission wiring method.

Page 35

Error Code

1234 56

OFF

1234 56

OFF

123456

OFF

123456

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

(1110)

Abnormal point and detection method

Pipe temperature

<Cooling mode> Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes after compressor start and 6 minutes after the liquid or condenser/evaporator pipe is out of cooling range. Note 1) It takes at least 9 minutes to

detect.

Note 2) Abnormality P8 is not detected in

drying mode.

Cooling range : Indoor pipe temperature

(TH2 or TH5) – room temperature (TH1)  -3

TH: Lower temperature between liquid pipe

temperature and condenser/ evaporator temperature

<Heating mode> When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished, the unit is 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  (Condenser/

Evaporator temperature(TH5) – room temperature(TH1))

Case

 Slight temperature difference

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

 Converse connection of

extension pipe (on plural units connection)

 Converse wiring of indoor/

outdoor unit connecting wire (on plural units connection)

 Defective detection of indoor

room temperature and pipe <condenser / evaporator> temperature thermistor

 Stop valve is not opened

completely.

Judgment and action

~Check pipe <liquid or condenser / evapo-

rator> 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)’.

)

Check converse connection of extension

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

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

Error Code Abnormal point and detection method Case Judgment and action

(6600)

(6602)

(6603)

Address duplicate definition

This error is displayed when transmission

from the units of same address is detected. Note) The address and attribute displayed

at remote controller indicate the controller that detected abnormality.

Hardware error of transmission processor

Transmission processor intended to transmit “0”, but “1” appeared on transmission

wire. Note) The address and attribute displayed

at remote controller indicate the controller that detected abnormality.

BUS BUSY

1. Overtime error by signal collision damage Abnormal if transmitting signal 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.

 There are 2 or more same

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

 Noise has entered into trans-

mission signal and signal was transformed.

Error is detected if waveform is



transformed when wiring works of transmission wire of outdoor unit, indoor unit, FRESH MASTER or LOSSNAY are done, or polarity is changed with the power on and transmission data collide each other.

 Defective transmitting receiving

circuit of transmission processor

 Transmission data is changed by

the noise on transmission.

Transmission processor could



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

 Transmission quantity has

increased and transmission of signal 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.

 Transmission is 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.

Search the unit with same address as abnormality occurred. If the same address is found, turn the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more after the address is corrected, and turn the power on again. Check transmission waveform or noise on transmission wire.

 If the work of transmission wire is done with

the power on, turn off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again.

 Check transmission waveform or noise on

transmission wire.

 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.

 Check if transmission wire of indoor unit,

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

 Check if terminal block for transmission wire

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

 Check transmission waveform or noise on

transmission wire.

Page 36

Error Code Abnormal point and detection method Case Judgment and action

(6606)

Communication error with communication processor

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

at remote controller indicate the controller that detected abnormality.

 Data of transmission proces-

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

 Address forwarding from unit

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

Turn off the power supply of outdoor unit, indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn 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 abnormality if a message was transmitted but there is no reply (ACK) that a message was received. Transmitting side detects abnormality every 30 seconds, 6 times continuously.

Note) The address and attribute displayed

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

2. If displayed address or attribute is out door unit, indoor unit detects abnormality when indoor unit transmits signal 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 transmits signal to indoor unit and there was no reply (ACK).

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

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

 Extinction of transmission wire

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

• Maximum distance·······200m

•

Remote controller line

 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····1.25mm

 Extinction of transmission wire

voltage and signal is caused by over-numbered units.

 Accidental malfunction of

abnormality-detected controller (noise, thunder surge)

 Defective of abnormality-gen-

erated controller

 Contact failure of transmission

wire of outdoor unit or indoor unit

 Disconnection of transmission

connector (CN2M) of outdoor unit

 Defective transmitting receiving

circuit of outdoor unit or indoor unit

 During group operation with

indoor unit of multi-refrigerant system, if remote controller transmits signal to indoor unit while outdoor unit power supply of one refrigerant system is turned off or within 2 minutes of restart, abnormality is detected.

 Contact failure of transmission

wire of remote controller or indoor unit

 Disconnection of transmission

connector (CN2M) of indoor unit

 Defective transmitting receiving

circuit of indoor unit or remote controller

(12m)

or more

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

 Turn off the power supply of outdoor

unit, indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again. If malfunction was accidental, the unit returns to normal.

 Check address switch of abnormality-gener-

ated address.

 Check disconnection or looseness of abnor-

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

 Check if tolerance range of transmission wire

is not exceeded.

 Check if type of transmission wire is correct

or not.

If there were some trouble of - above, repair the defect, then turn off the power supply of outdoor unit, indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again.

• If there was no trouble with - above in

single refrigerant system (one outdoor unit), controller of displayed address or attribute is defective.

• If there was no trouble with - above in dif-

ferent refrigerant system (2 or more outdoor units), judge with .

 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 - above, replace the controller board of displayed address or attribute. If the unit does not return to normal, multi-controller board of outdoor unit may be defective (repeater circuit). Replace multi-controller board one by one to check if the unit returns to normal.

Continued to the next page

Page 37

From the previous page

Error Code Abnormal point and detection method Case Judgment and action

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

 During group operation with

indoor unit of multi- refrigerant system, if indoor unit transmit signal to remote controller while outdoor unit power supply of one refrigerant system is put off or within 2 minutes of restart, abnormality is detected.

 Contact failure of transmission

wire of remote controller or indoor unit

 Disconnection of transmission

connector (CN2M) of indoor unit

 Defective transmitting receiving

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 transmits signal to FRESH MASTER and there was no reply (ACK).

6. If displayed address or attribute is LOSSNAY, indoor unit detects abnormality when indoor unit transmits signal to LOSSNAY and there was no reply (ACK).

 During sequential operation

of indoor unit and FRESH MASTER of other refrigerant system, if indoor unit transmits signal to FRESH MASTER while outdoor unit power supply of same refrigerant system with FRESH MASTER is turned off or within 2 minutes of restart, abnormality is detected.

 Contact failure of transmission

wire of indoor unit or FRESH MASTER

 Disconnection of transmission

connector (CN2M) of indoor unit or FRESH MASTER

 Defective transmitting receiving

circuit of indoor unit or FRESH MASTER

 If the power supply of

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

 During sequential operation

of indoor unit and LOSSNAY of other refrigerant system, if indoor unit transmits signal to LOSSNAY while outdoor unit power supply of same refrigerant system with LOSSNAY is turned off or within 2 minutes of restart, abnormality is detected.

 Contact failure of transmis-

sion wire of indoor unit of LOSSNAY

 Disconnection of transmission

connector (CN2M) of indoor unit

 Defective transmitting receiv-

ing circuit of indoor unit or LOSSNAY

7. If displayed address or attribute is nonexistent.

 The unit of former address

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

 Abnormality is detected

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

Page 38

Error Code Abnormal point and detection method Case Judgment and action

M-NET NO RESPONSE

Abnormal if a message was transmitted and there were reply (ACK) that message was received, but response command does not return. Transmitting side detects abnormality every 30 seconds, 6 times continuously. Note) The address and attribute displayed

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

(6608)

 Transmitting condition is

repeated fault because of noise and the like.

 Extension of transmission wire

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

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

•

 Extension 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

(12m)

 Check transmission waveform or noise on

transmission wire.

 Turn off the power supply of outdoor unit

and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn 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.

CVS, VVR, VVF, VCT

Diameter······1.25mm

 Accidental malfunction of

abnormality-generated controller

or more

10-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

Phenomena

1. Remote controller display does not work.

2. “PLEASE WAIT” display is remained on the remote controller.

DC12V is not supplied to remote controller.

(Power supply display is not indicated on LCD.)

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

no display is indicated.

• “PLEASE WAIT” is not displayed.

• “PLEASE WAIT” is displayed.

At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to start up.

Communication error between the remote controller

and indoor unit

Communication error between the indoor and outdoor

unit

Outdoor unit protection device connector is open.

Factor Countermeasure

Check 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 phenomena No.3 below. Check the following.

• Failure of remote controller if “PLEASE

WAIT” is not displayed

• Refer to phenomena No.2 below if

“PLEASE WAIT” is displayed.

Normal operation Self-diagnosis of remote controller ”PLEASE WAIT” is displayed for 6 min-

utes at most in case of indoor/outdoor unit communication error. Check LED3 on

indoor controller board. (1)When LED3 is not blinking. Check indoor/outdoor connecting wire for miswiring. (Converse wiring of S1 and S2, or break of S3 wiring.) (2)When LED3 is blinking. Indoor/outdoor connecting wire is nor mal. Check LED display on outdoor controller circuit board. Refer to 10-10. Check protection device connector (63H) for contact failure. Refer to 10-9.

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

After cancelling to select function from the remote

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

Normal operation

Page 39

Phenomena

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

Factor

The pair number settings of the wireless remote con-

troller and indoor controller board are mismatched.

Countermeasure

Check the pair number settings.

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 is not cool enough.)

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

No operation for 2 minutes at most after the power

supply ON.

Local remote controller operation is prohibited.

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

• Local remote controller operation is prohibited by centralised controller etc. since it is connected to MELANS.

 Phenomena of No.2.

Refrigerant shortage

Filter clogging

Heat exchanger clogging

Air duct short cycle

Linear expansion valve fault

Opening cannot be adjusted well due to linear expan sion valve fault.

Refrigerant shortage

Lack of insulation for refrigerant piping Filter clogging

Heat exchanger clogging

Air duct short cycle Bypass circuit of outdoor unit fault

Normal operation

Check the phenomena of No.2.

• 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. Open suction grille and check the filter.

Clean the filter by removing dirt or dust on

it. • 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.

Remove the shield.

• Discharging temperature and indoor

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

• Replace linear expansion valve.

• 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.

Check the insulation. Open suction grille and check the filter.

Clean the filter by removing dirt or dust on it.

• 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.

Remove the shield. Check refrigerant system during opera-

tion.

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

Normal operation (For protection of compressor)

Normal operation

Page 40

Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller.

Diagnosis flow Cause

Check the display time of “PLEASE WAIT”

after turning on the main power.

6 minutes or more

Check the LED display of the outdoor controller circuit board.

2 minutes

How long is “PLEASE WAIT”

kept being displayed on the

remote controller?

2 to 6 minutes

Are any error codes

displayed on the

remote controller?

YES

or less

“PLEASE WAIT”

• will be displayed during the start-up

diagnosis after turning

on the main power.

Inspection method and troubleshooting

• Normal. The start-up diagnosis will

be over in around 2 minutes.

Are any error codes

displayed on the LED?

YES

• Miswiring of indoor/ outdoor connecting wire

• Breaking of indoor/ outdoor connecting wire (S3)

• Defective indoor controller board

• Defective outdoor controller circuit board

• Defective indoor controller board

• Defective remote controller

• Refer to “Self-diagnosis action table” in order to solve the trouble.

• In case of communication errors, the display of remote controller may not match the LED display of the outdoor unit.

Page 41

Symptoms: Nothing is displayed on the remote controller 

LED display of the indoor controller board LED1 : LED2 : LED3 :

Diagnosis flow Cause

Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.

AC 198V to AC 264V?

YES

Check the voltage among L(L3) and N on the terminal block (TB1) of the outdoor power circuit board.

AC 198V to AC 264V?

YES

Check the voltage between S1 and S2 on the terminal block (TB1) of the outdoor unit which is used to connect the indoor unit and the outdoor unit.

•

Troubles concerning

power supply

Inspection method and troubleshooting

• Check the power wiring to the outdoor unit.

• Check the breaker.

Check the voltage of indoor controller board (CN2D).

DC 12V to DC 16V?

YES

Check the voltage of the unit after removing the indoor power board (CN2S).

DC 12V to DC 16V?

YES

AC 198V to AC 264V?

YES

• Bad wiring of the outdoor controller board

• The fuses on the outdoor controller circuit board are blown.

• Bad wiring of the outdoor controller board

• The fuses on the outdoor controller circuit board are blown.

• Defective indoor controller board

• Miswiring, breaking or poor connection of in door/outdoor connecting wire

• Check the wiring of the outdoor unit.

• Check if the wiring is bad. Check if the fuses are blown.

The fuses on the outdoor controller circuit board will be blown when the indoor /outdoor connecting wire short-circuits.

• Check if miswiring, breaking

or poor contact is causing this problem. Indoor/outdoor connecting wire is polarized 3-core type. Connect the indoor unit and the outdoor unit by wiring each pair of S1, S2 and S3 on the both side of indoor/outdoor terminal blocks.

• Replace the indoor controller board.

•

Check if there is miswiring

or breaking of wire.

• Defective indoor power board

• Replace the indoor power board.

Page 42

Symptoms: Nothing is displayed on the remote controller 

LED display of the indoor controller board LED1 : LED2 : LED3 : or

Diagnosis flow Cause

Check the voltage between S1 and of the

indoor unit which is used to connect the indoor unit and the

outdoor unit.

AC 198V to AC 264V?

YES

Check the status of the indoor controller board LED3 display.

Blinking.

Check the refrigerant address of the outdoor unit. (SW1-3 to 1-6)

Is the refrigerant address “0”?

YES

Check the LED display of the outdoor unit after turning on the main power again.

S2 on the terminal block (TB4)

Not lighting.

Check the looseness or disconnection of the indoor/outdoor connecting wire.

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

YES

•

Breaking or poor contact of the indoor/outdoor connecting wire

• Normal Only the unit which has the refrigerant address “0” supplies power to the remote controller.

Inspection method and troubleshooting

• Fix the breaking or poor contact of the indoor/outdoor

connecting wire.

• Set the refrigerant

address to “0”. In case of the multiple grouping system, recheck the refrigerant address again.

Is anything displayed?

Displayed.

Is “EA” or “Eb” displayed?

YES

Check the voltage between S2 and S3 on the terminal block of the outdoor unit.

DC 17V to DC 28V?

YES

Not displayed.

Is “E8” displayed?

Can the unit be restarted?

Can all the indoor

unit be operated?

YES

• Defective outdoor controller circuit board

YES

• Defective outdoor controller circuit board

• Defective indoor controller board

• Influence of electromagnetic noise

• Defective outdoor

power circuit board

• Defective indoor

power board

• Replace the outdoor controller circuit board.

Replace the indoor controller

• board of the indoor unit which

doesn’t operate.

• Not abnormal. There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

• Replace the outdoor

power circuit board.

• Replace the indoor

power board.

Page 43

Symptoms: Nothing is displayed on the remote controller 

LED display of the indoor controller board LED1 : LED2 : or LED3 : —

Diagnosis flow Cause

Check the voltage of the terminal block (TB6) of the remote controller.

DC 10V to DC 16V?

Check the status of the LED2.

Blinking

Check the status of the LED2 after disconnecting the remote controller wire from the terminal block (TB5) of the indoor unit.

YES

Lighting

• Defective remote controller

• Breaking or poor contact of the remote controller wire

Inspection method and troubleshooting

• Replace the remote controller.

• Check if there is breaking or poor contact of the remote controller wire. Check the voltage of the terminal block (TB5) connecting the remote controller wire.

If it is not between DC 10V and DC16V, the indoor controller board must be defective.

Check the status of the LED2.

Blinking

Lighting

• The remote controller wire short-circuits

• Defective indoor controller board

• Check if the remote controller wire is short-circuited.

• Replace the indoor controller board.

Page 44

• Before repair Frequent calling from customers

Phone Calls From Customers How to Respond Note

Unit does not operate at all.

 The operating display of remote controller does not come on.

 Unit cannot be restarted for a while after it’s stopped.

 Error code appears and blinks on the display of remote controller.

 Check if power is supplied to air conditioner. Nothing appears on the display unless power is supplied.

 Wait around 3 minutes to restart unit. The air conditioner is in a state of being protected by the microcomputer’s directive. Once the compressor is stopped, the unit cannot be restarted for 3 minutes. This control is also applied when the unit is turned on and off by remote controller.

 Error code will be displayed if any protection devices of the air conditioner are actuated. What is error code?

Refer to “SELF-DIAGNOSIS ACTION TABLE”. Check if servicing is required for the error.

Remote controller

 “PLEASE WAIT” is displayed on the screen.

 “FILTER” is displayed on the screen.

 “STANDBY” is displayed on the screen.

 “DEFROST” is displayed on the screen. (No air comes out of the unit.)

 Wait around 2 minutes. An automatic startup test will be conducted for 2 minutes when power is supplied to the air conditioner. “PLEASE WAIT” will be kept being displayed while that time.

 This indicates that it is time to clean the air filters. Clean the air filters. Press the FILTER button on the remote controller twice to clear “FILTER” from the display. See the operation manual that came with the product for how to clean the filters.

 This is displayed when the unit starts HEAT operation, when the thermostat puts the compressor in operation mode, or when the outdoor unit ends DEFROST operation and returns to HEAT operation. The display will automatically disappear around 10 minutes later. While “STANDBY” is displayed on the remote controller, the airflow amount will be restricted because the indoor unit’s heat exchanger is not fully heated up. In addition to that, the up/down vane will be automatically set to horizontal blow in order to prevent cold air from directly blowing out to human body. The up/down vane will return to the setting specified by the remote controller when “STANDBY” is released.

 The outdoor unit gets frosted when the outside temperature is low and the humidity is high. “DEFROST” indicates the DEFROST operation is being performed to melt this frost. The DEFROST operation ends in around 10 minutes (at most 15 minutes). During the DEFROST operation, the indoor unit’s heat exchanger becomes cold, so the fan is stopped. The up/down vane will be automatically set to horizontal blow in order to prevent cold air from directly blowing out to human body. The display will turn into “STANDBY” when DEFROST operation ends.

Display time of “FILTER” depends on the model. Long life filter: 2500 hrs. Regular filter: 100 hrs.

Page 45

Phone Calls From Customers How to Respond Note

The room cannot be cooled or heated sufficiently.

Sound comes out from the air conditioner.

Something is wrong with the blower…..

An gas escaping sound is heard



sometimes.

A cracking sound is heard



sometimes.

A buzzing sound is heard



sometimes.

A ticking sound is heard from



the outdoor unit sometimes.

A sound, similar to water



flowing, is heard from the unit.



The fan speed doesn’t match the setting of the remote controller during DRY operation.(No air comes out sometimes during DRY operation.)

The fan speed doesn’t match



the setting of the remote controller in HEAT operation.

 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set temperature is not appropriate.

The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature. HEAT: When the set temperature is higher than the room temperature.

 Check if filters are dirty and clogged. If filters are clogged, the airflow amount will be reduced and the unit capacity will be lowered. See the instruction manual that came with the product for how to clean the filters.

 Check there is enough space around the air conditioner. If there are any obstacles in the air intake or air outlet of indoor/outdoor units, they block the airflow direction so that the unit capacity will be lowered.

 This is not a malfunction. This is the sound which is heard when the flow of refrigerant in the air conditioner is switched.

 This is not a malfunction. This is the sound which is heard when internal parts of units expand or contract when the temperature changes.

 This is not a malfunction. This is the sound which is heard when the outdoor unit starts operating.

 This is not a malfunction. This is the sound which is heard when the fan of the outdoor unit is controlling the airflow amount in order to keep the optimum operating condition.

 This is not a malfunction. This is the sound which is heard when the refrigerant is flowing inside the indoor unit.

 This is not a malfunction. During the DRY operation, the blower’s ON/OFF is controlled by the microcomputer to prevent overcooling and to ensure efficient The fan speed cannot be set by the remote controller during DRY operation.

 This is not a malfunction.

1) When the HEAT operation starts, to prevent the unit from blowing cold air, the fan speed is gradually increased from zero to the set speed, in proportion to the temperature rise of the discharged air.

2) When the room temperature reaches the set temperature and the outdoor unit stops, the unit starts the LOW AIR operation.

3) During the HEAT operation, the DEFROST operation is performed to defrost the outdoor unit. During the DEFROST operation, the blower is stopped to prevent cold air coming out of the indoor unit.

dehumidification.

The up/down vane will be automatically set to horizontal blow in these cases listed up on the left ( 1)~3)). After a while, the up/down vane will be automatically moved according to the setting of the remote controller.

Page 46

Phone Calls From Customers How to Respond Note

Something is wrong with the blower….

Something is wrong with the airflow direction

....

 Air blows out for a while after HEAT operation is stopped.

 The airflow direction is changed during COOL operation.

 The airflow direction is changed during HEAT operation.(The airflow direction cannot be set by remote controller.)

 The airflow direction doesn’t change.(Up/down vane, left/right louver)

This is not a malfunction. The blower is operating just for cooling down the heated-up air conditioner. This will be done within 1 minute. This control is conducted only when the HEAT operation is stopped with the electric heater ON.

 If the up/down vane is set to downward in COOL operation, it will be automatically set to horizontal blow by the microcomputer in order to prevent water from dropping down. “1 Hr.” will be displayed on the remote controller if the up/down vane is set to downward with the fan speed set to be less than “LOW”.

 In HEAT operation, the up/down vane is automatically controlled according to the temperature of the indoor unit’s heat exchanger. In the following cases written below, the up/down vane will be set to horizontal blow, and the setting cannot be changed by remote controller.

1) At the beginning of the HEAT operation

2) While the outdoor unit is being stopped by thermostat or when the outdoor unit gets started to operate.

3) During DEFROST operation The airflow direction will be back to the setting of remote controller when the above situations are released.

 1) Check if the vane is set to a fixed position.

(Check if the vane motor connector is removed.)

2) Check if the air conditioner has a function for switching the air direction.

3) If the air conditioner doesn’t have that function, “NOT AVAILABLE” will be displayed on the remote controller when “AIR DIRECTION” or “LOUVER” button is pressed.

However, this control is also applied to the models which has no electric heater.

“STANDBY” will be displayed on the remote controller in case of 1) and

2) “DEFROST” will be displayed on the screen in case of 3).

The air conditioner starts operating even though any buttons on the remote controller are not pressed.

The air conditioner stops even though any buttons on the remote controller are not pressed.

 Check if you set ON/OFF timer. The air conditioner starts operating at the time designated if ON timer has been set before.

 Check if any operations are ordered by distant control system or the central remote controller. While “CENTRALLY CONTROLLED INDICATOR” is displayed on the remote controller, the air conditioner is under the control of external directive.

 Check if power is recovered from power failure (black out). The units will automatically start operating when power is recovered after power failure (black out) occurs. This function is called “power failure automatic recovery".

 Check if you set ON/OFF timer. The air conditioner stops operating at the time designated if OFF timer has been set before.

There might be a case that “CENTRALLY CONTROLLED INDICATOR” will not be displayed.

Page 47

Phone Calls From Customers How to Respond Note

A white mist is expelled from the indoor unit.

Water or moisture is expelled from the outdoor unit.

The display of wireless remote controller gets dim or doesn’t come on. The indoor unit doesn’t receive a signal from remote controller at a long distance.

This is not a malfunction. This may occur when the operation gets started in the room of high humidity.

Cooling; when pipes or piping joints are cooled, they get sweated and water drips down. Heating; water drips down from the heat exchanger. * Make use of optional parts “Drain Socket” and “Drain pan” if these water needs to be collected and drained out for once.

Batteries are being exhausted. Replace them and press the reset button of remote controller.

Page 48

10-6. HOW TO CHECK THE PARTS PUHZ-RP200YHA2 PUHZ-RP250YHA2

Parts name

Thermistor (TH3) <Outdoor pipe>

Thermistor (TH4) <Discharge>

Thermistor (TH6) <Outdoor 2-phase pipe>

Thermistor (TH7) <Outdoor>

Fan motor(MF1,MF2)

4-way valve coil (21S4)

Compressor (MC)

Check points

Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10~30)

TH4

Normal

160k~410k

Abnormal

TH3

TH6

4.3k~9.6k

Open or short

TH7

Refer to next page.

Measure the resistance between the terminals with a tester.



(At the ambient temperature 20

Normal

1435±150

)

Abnormal

Open or short

Measure the resistance between the terminals with a tester. (Winding temperature 20



)

Normal Abnormal

Linear expansion valve (LEV-A) RP200

Gray

Orange

Red

Yellow

Black

1 2 3 4 5 6

Linear expansion valve ( LEV-A, LEV-B) RP250

Red

Brown

Blue

Orange

Yellow

White

1 2 3

4 5 6

Bypass valve coil (SV)

0.30

Open or short

Disconnect the connector then measure the resistance with a tester. (Winding temperature 20)

Normal

Gray - Black Gray - Red

Gray - Yellow

Gray - Orange

46±3

Disconnect the connector then measure the resistance (

Winding temperature 20

)

Normal

Red - White

Red - Orange

Brown - Yellow

Brown - Blue

with

a tester.

Abnormal

Open or short

46±4

Measure the resistance between the terminals with a tester. (At the ambient temperature 20



)

Normal Abnormal

Abnormal

Open or short

1197±10

Open or short

Page 49

Check method of DC fan motor (fan motor / outdoor controller circuit board)

Notes



· High voltage is applied to the connecter (CNF1, 2) for the fan motor. Give attention to the service.

· Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor.) Self check



Symptom : The outdoor fan cannot turn around.

Fuse check

Check the fuse (F5) on outdoor controller board.

Did the fuse blow?

Wiring contact check

Contact of fan motor connector (CNF1, 2)

Is there no contact failure?

Yes

Power supply check (Remove the connector (CNF1, 2))

Measure the voltage in the outdoor controller circuit

TEST POINT

 : VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC250~330V

Yes

Replace outdoor controller board (C.B) and fan motor (MF1, 2).

Recover wiring.

board.

TEST POINT  : VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V

Is the voltage normal?

Yes

Replace the fan motor.

Yes

Check the operation of fan. END

Replace outdoor

controller board.

Check the operation. END

Replace outdoor controller board.

Replace the fan motor.

Page 50

10-7. HOW TO CHECK THE COMPONENTS

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 = 3480 ± 2%

t =15exp{3480(

0 15k 10 9.6k

273+t–273

)}

30 4.3k

40 3.0k 20 6.3k 25 5.2k

High temperature thermistor

• Thermistor <Discharge> (TH4)

Thermistor R120 = 7.465k ± 2% B constant = 4057 ± 2%

t =7.465exp{4057(

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

Resistance (k)

-20 -10 0 10 20 30 40 50

Temperature ()

)}

Page 51

)

Linear expansion valve

(RP200)

(1) Operation summary of the linear expansion valve

• Linear expansion valve opens/closes 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>

Outdoor controller board

DC12V

Gray

Orange

Red

Yellow

Black

Drive circuit

LEV

Connector LEV-A

OFF

Output

5678

OFF

Output

(Phase)

234

OFF

(2) Linear expansion valve operation

Valve position (capacity)

Open

OFF



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.

• 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

 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 sound or vibration occurring from the linear expansion valve ; however, when the pulse number moves from

 to  or when the valve is locked, sound can

be heard.

No sound is heard when the pulse number moves from

 to  in

case coil is burnt out or motor is locked by open-phase.

• Sound can be detected by placing the ear against the screw driver handle while putting the screw driver to the linear expansion valve.





htning (about 32 pulse

Extra ti

Pulse number

500 pulse Opening a valve all the way

Page 52

)

Linear expansion valve

(RP250)

(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 circuit board.

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

Outdoor controller board

DC12V

LEV

Red

Brown

Blue

Orange

Yellow

White

Drive circuit

OFF

Output

5678

OFF

Open

OFF



Output

(Phase)

234

OFF

(2) Linear expansion valve operation

Valve position (capacity)

Connector LEV-A

LEV-B

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.

• 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

 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 sound or vibration occurring from the linear expansion valve ; however, when the pulse number moves from

 to  or when the valve is locked, sound can

be heard.

No sound is heard when the pulse number moves from

 to  in

case coil is burnt out or motor is locked by open-phase.

• Sound can be detected by placing the ear against the screw driver handle while putting the screw driver to the linear expansion valve.

Extra ti





htning (about 32 pulse

500 pulse Opening a valve all the way

Pulse number

Page 53

(3) How to attach and detach the coil of linear expansion valve(RP200)

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

Stopper

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.

Main bod

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 main body. (At this time, be careful that stress is not added to lead wire and main body is not wounded by lead wire.) If the stopper is not firmly attached to main body, 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.

Page 54

(4) How to attach and detach the coil of linear expansion valve(RP250)

Be sure to attach the stopper to pipe B.

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

Coil

Lead wire

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.

Page 55

10-8. EMERGENCY OPERATION

SW4

1 2 Cooling

Heating

(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 opera tion switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.

When following abnormalities occur, emergency operation will be available.

Error code

E0 ~ E7

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

Make 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.) For 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. During 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. Do 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. Do 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

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

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)

CN31

Shorting pin

SW4

Heating

1 2 Cooling

OFF

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

(4) Releasing emergency operation

Turn the main power supply off. Set the emergency operation switch (SWE) on indoor controller board to OFF. Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to OFF. Set SW4-2 on outdoor controller board as shown in the right.

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

Page 56

(5) Operation data during emergency operation

During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values:

Operation mode

Operation data

COOL

Room temperature (TH1)

Indoor pipe temperature (TH2)

Indoor 2-phase pipe temperature (TH5)

Set temperature

Outdoor pipe temperature (TH3)

Outdoor discharge pipe temperature (TH4)

Outdoor 2-phase pipe temperature (TH6)

Outdoor air temperature (TH7)

Temperature difference code (room temperature - set temperature) (Tj)

Discharge superheat (SHd)

Sub-cool (SC)

+1: If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data.

When the unit enters emergency operation and TH values are mismatched, set the thermistors to open/short. And the unit runs emergency operation with the values listed above.

+2: If one thermistor is set to open/short, the values of SHd/SC will be different from the list above. [Example] When liquid temperature thermistor (TH3) has an open or short circuit.

27

5

25

45

80

50

35

30deg

5deg

HEAT

20.5

45

50

22

5

80

5

7

30deg

5deg

(+1)

(+2)

Remarks

—

Thermistor

TH3

TH6

TH4

TH5

TH2

Discharge superheat (SHd) Cooling = TH4 - TH6 = Tc - Ta Heating = TH4 - TH5 = Td - 50

Degree of subcooling (SC) Cooling = TH6- TH3 = Ta -45 Heating = TH5- TH2 = 50 - 45 = 5

COOL

45

Regard normal figure as effective data.

5

HEAT

5

50

45

Page 57

10-9. TEST POINT DIAGRAM Outdoor controller circuit board PUHZ-RP200YHA2 PUHZ-RP250YHA2

SW7

Demand control setting

SW1

Forced defrost, detect history record reset, refrigerant address

<CAUTION> TEST POINT is high voltage.

SW6

Model select

SW4

Test operation

SWP

Pump down

SW5

Function switch

SW8

Wiring replace Pipe replace

CNM Connect to A control service tool

CNMNT Connect to M-NET adapter(CN5)

CNVMNT Connect to M-NET adapter(CND)

LEV-A, B

Linear expansion valve

TH4

Thermistor <Discharge>

CN51

External signal output

• Compressor operating signal

• Abnormal signal

CNDM

 to :

Input of low-level sound priority mode  to : Input of external con-

tact point

CN4

Transmission to outdoor power circuit board (CN4)

SV2

Bypass valve

21S4

4-way valve

63L

Low pressure switch (RP250)

TH3

Thermistor <Outdoor pipe>

TH7/6

Thermistor <Outdoor/ 2-phase pipe>

63H

High pressure switch

VFG (TEST POINT )

(Voltage between right pins of PC5C and PC5D, pin 3 and pin 4) (Same as

(+)-(-))

(CNF1

VSP (TEST POINT )

(Voltage between pins of C5A, C5B): DC 0V (when stopped), DC 1–

6.5V (when operated)

CNF1, CNF2 Connect to the fan motor

-: 280V DC -: 15V DC -: 0-6.5V DC -: 15V DC(When stopped)

7.5V DC(When operated) (0V-15V pulse)

CNDC

Connect to the outdoor noise filter circuit board(CNDC)

CN2

Connect to the outdoor power circuit board (CN2) -: Reception from

power circuit board

-: Zero cross signal

(0-5V DC)

,: Not used -: 16V DC -: 16V DC

CNAC

 to : Power supply for outdoor controller circuit board (220V-240V AC)  to : Power supply for indoor and outdoor unit connection wire (220-240V AC)

CNS

S1-S2:220-240V AC

+ -

Communication power supply D71 Voltage 24V DC

Page 58

Outdoor noise filter circuit board PUHZ-RP200YHA2 PUHZ-RP250YHA2

GD1

Connect to the earth

LI1, LI2, LI3, NI POWER SUPPLY

LI1-LI2/LI-LI3/LI3-LI1 : AC380/400/415V input LI1-NI/LI2-NI/LI3-NI : AC220/230/240V input (Connect to the terminal block (TB1))

CNAC1, CNAC2 AC220/230/240V

(Connect to the outdoor controller circuit board (CNAC))

GD2

Connect to the earth

CNDC

(Connect to the outdoor controller circuit board (CNDC))

CNCT Primary current

(Connect to the

outdoor power

circuit board (CN5))

CNL Connect to the ACL4

LO1, LO2, LO3 POWER SUPPLY

LO1-LO2/LO2-LO3/LO3-LO1 : AC380/400/415V OUTPUT (Connect to the outdoor power circuit board (TB-L1, L2, L3))

Page 59

Outdoor power circuit board PUHZ-RP200YHA2 PUHZ-RP250YHA2

CN2 Connect to the outdoor controller circuit board (CN2) -3RZHUFLUFXLWERDUGĺ7UDQVPLWWLQJ

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

-: Zero cross signal (0-5V DC) -: Not used -: 16V DC -: 16V DC

[  : – , , , @

Brief check of POWER MODULE  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 .Check of DIODE circuit

L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 .Check of IGBT circuit

P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W Note:The marks, L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W shown in the diagram are not actually printed on the board.

SC-U, SC-V, SC-W

Connect to the compressor (MC) Voltage among phases: 10V-400V AC

CN4

Connect to the outdoor controller circuit board (CN4)

CN5

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

TB-P1

Connect to DCL

TAB connecter on X52A Connect to the RS resistor

TB-C1

Connect to the smoothing capacitor

– , CB2 +

CB1

TB-P2

Connect to the smoothing capacitor CB1

TB-L1, TB-L2, TB-L3

Connect to the outdoor noise filter circuit board (L01, L02, L03) 380V-415V AC

POWER MODULE

TB-N1

Connect to the smoothing capacitor CB2

–

Page 60

10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches

Type

switch

Dip

switch

Switch

SW1

SW4

No.

Function Effective timing

Forced defrost

1 Start Normal

Abnormal history clear

123

Refrigerant address setting

Test run Operating OFF

Test run mode setting Heating Cooling

123

+1.Forced defrost should be done as follows.

Change the DIP SW1-1 on the outdoor controller board from OFF to ON. Forced defrost will start by the above operation if these conditions written below are satisfied.

• Heat mode setting

• 10 minutes have passed since compressor started operating or previous forced defrost finished.

• Pipe temperature is less than or equal to 8.

• Forced defrost will finish if certain conditions are satisfied. Forced defrost 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.

Action by the switch operation

ON OFF

When compressor is working in heating operation. +

Clear Normal off or operating

456ON123456ON123456ON123456

012 3

456ON123456ON123456ON123456

456 7

456ON123456ON123456ON123456

891011

456ON123456ON123456ON123456

12 13 14 15

When power supply ON

Under suspension

Type of

Switch

Dip

switch

Push

switch

Switch

SW5

SW7

SW8

SW9

SWP

No.

3,4,5

Function Effective timing

No function

Power failure

automatic recovery +2

No function

Model select

Setting of demand

control +3

Max Hz setting (cooling)

Max Hz setting (heating)

3,4

No function

Defrost Hz setting

Use of existing pipe

No function

Use of existing wires

No function

Function switch

No function

Pump down

Action by the switch operation

ON OFF

—

Auto recovery

—

SW7-1 SW7-2

OFF

Max Hz(cooling)

Max Hz(heating)

—

For high humidity

Existing pipe

—

Existing wires

—

Valid

—

Start

OFF

0% (Operation stop)

OFF

0.8

—

No auto recovery

—

Refer to next page.

Power consumption (Demand switch ON)

50%

75%

Normal

—

Normal

New pipe

—

New wires

—

Normal

—

Normal

—

When power supply ON

—

Always

—

Always

—

When power supply ON

—

Always

—

Under suspension

+2 “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 do not have DIP SW. Please refer to the indoor unit installation manual. +3SW7-1,2 are used for demand control. SW7-1,2 are effective only at the demand control. (Refer to next page : Special function (b)) +4Please do not use SW7-3~5 usually. Trouble might be caused by the usage condition.

Page 61

(2) Function of connectors and switches

CN31

Types

Connector

Switch

Function Effective timing

Connector

SW6

SW5-6

SW6-1 SW6-2 SW6-3 SW6-4 SW6-5 SW6-6 SW6-7 SW6-8 SW5-6

Start

Short Open

Action by open/ short operation

Model select

Emergency operation

When power supply ON

Normal

MODEL

SW6 SW5-6

12345678

OFF

123456

OFF

200Y

12345678

OFF

123456

OFF

250Y

Special function

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

Unit enters into Low-level sound priority mode by 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.

 The performance depends on the load of conditioned outdoor temperature.

How to wire

<Low-level sound priority mode circuit>

Insulate this point securely as this is not used.

Procured locally

Relay supply

SW1

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

Max. 10 m including local wiring

Adapter for external signal input (PAC-SC36NA)

Red 3

Brown 2

Orange 1

Outdoor unit controller board

  

CNDM

1) Make the circuit as shown above with adapter 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) Demand control (Local wiring)

Demand control is available by external input. In this mode, power consumption is decreased within the range of usual 0~100%.

How to wire Basically, the wiring is same with (a). Connect an SW 1 which is procured locally between Orange and Red(1 and 3) of the adapter for external signal input(PAC-SC36NA), and insulate the tip of the brown lead wire.

It is possible to set it to the following power consumption (compared with ratings) by setting the SW7-1, 2.

SW7-1 SW7-2

OFF

Power consumption

(SW1 on)

0% (Operation stop)

50%

75%

Page 62

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.

[Display] (1)Normal condition

Unit condition

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

(2)Abnormal condition

Indication Error

Outdoor controller board

LED1 (Green) LED2 (Red)

1 blinking 2 blinking

4 blinking

2 blinking 1 blinking

2 blinking

3 blinking

4 blinking

5 blinking

1.Error code displayed on remote controller 2.Refer to service manual for indoor unit.

Connector(63L) is open. Connector(63H) is open.

2 connectors are open.

Abnormality of indoor controller board

Miswiring of indoor/outdoor unit connecting wire, excessive number of indoor units (5 units or more)

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

Startup time over

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.

Error code is not defined.

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 M-NET system

Outdoor controller board A-Control Service Tool

LED1 (Green) LED2 (Red) Error code

Lighted Lighted Lighted Lighted

Lighted

Contents Inspection method

Not lighted Not lighted

Lighted

Error code



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

board is not disconnected.



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

Replace indoor controller board

Check if indoor/outdoor connecting wire is connected correctly.



—



Check if 5 or more indoor units are connected to outdoor unit.

Check if noise entered into indoor/outdoor connecting wire

—

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

00, etc. 08, etc.

C5, H7 etc.

—



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.

—

Check if connecting wire of indoor unit or remote controller

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

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

Check if remote controller is MA remote controller(PAR-21MAA). Check if noise entered into transmission wire of remote controller.

Check if noise entered into indoor/outdoor connecting wire. Re-check error by turning off power, and on again.



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).



A0~A8

Check M-NET communication signal.

Indication of the display

Alternately blinking display

Operation mode

Detailed

reference

P.28

P.29 (EA) P.29 (Eb) P.29

(EC)

P.34 (E8)

P.34 (E9)

P.33

P.34

P.33

P.34

P.35~

P.38

page

Page 63

Indication Error

Outdoor controller board

LED1 (Green)

3 blinking 1 blinking

LED2 (Red)

Abnormality of discharging temperature (TH4) Shortage of refrigerant

2 blinking

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

Abnormal low pressure

3 blinking

Abnormality of outdoor fan motor rotational speed

Protection from overheat operation(TH3)

4 blinking

Compressor overcurrent breaking(Start-up locked)

Compressor overcurrent breaking Abnormality of current sensor (P.B.) Abnormality of power module

5 blinking

Open/short of discharge thermistor (TH4)

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

Contents Inspection method

Error code

Check if stop valves are open. Check if connectors (TH4, LEV-A and LEV-B) on outdoor controller

board are not disconnected.

Check if unit is filled with specified amount of refrigerant. Measure resistance values among terminals on outdoor linear

expansion valve using a tester. Check if indoor/outdoor units have a short cycle on their air ducts.



Check if connector (63H or 63L) on outdoor controller board is not disconnected.

Check if heat exchanger and filter is not dirty. Measure resistance values among terminals on linear expansion valve

using a tester.

Check the outdoor fan motor.

Check if connector (TH3) on outdoor controller board is disconnected.

Check if stop valves are open.

Check looseness, disconnection, and converse connection of

compressor wiring.



Measure resistance values among terminals on compressor using a tester.

Check if outdoor unit has a short cycle on its air duct.

Check if connectors

and connector

Measure resistance value of outdoor thermistors.

(TH3,TH4,TH6 and TH7)

(CN3)

on outdoor power board are not disconnected.

on outdoor controller board

Detailed

reference

page

P.30

P32

P.31

P.32 P.32

P.33 P.32 P.31 P.30 P.31

6 blinking

Abnormality of heatsink temperature

4 blinking

7 blinking

1 blinking

Abnormality of voltage Check looseness, disconnection, and converse connection of

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

2 blinking

Abnormality of drain sensor (DS) Float switch connector open

Indoor drain overflow protection

3 blinking

Freezing (cooling)/overheating (heating) protection

4 blinking

Abnormality of pipe temperature

1 Error code displayed on remote controller 2 Refer to service manual for indoor unit.

Check if indoor/outdoor units have a short cycle on their air ducts.

Measure resistance value of outdoor thermistor(TH8).

compressor wiring.

Measure resistance value among terminals on compressor using a tester



Check the continuity of contactor (52C). Check if power supply voltage decreases. Check the wiring of CN52C. Check the wiring of CNAF.

Check if connectors (CN20, CN21, CN29 and CN44) on indoor

controller board are not disconnected.

Measure resistance value of indoor thermistors.

Check if connector (CN31),(CN4F) on indoor controller board is not

disconnected.

Measure resistance value of indoor thermistors. Measure resistance value among terminals on drain-up machine using

a tester.

Check if drain-up machine works. Check drain function.

Check if indoor unit has a short cycle on its air duct. Check if heat exchanger and filter is not dirty.

Measure resistance value on indoor and outdoor fan motors. Check if the inside of refrigerant piping is not clogged.



Check if indoor thermistors(TH2 and TH5) are not disconnected from holder.

Check if stop valve is open. 

Check converse connection of extension pipe. (on plural units connection)

Check if indoor/outdoor connecting wire is connected correctly. (on plural units connection)

P.31

P.32

2 2 2

2

Page 64

1ON23456

1 second

interval

Display

Contents to be inspected (During operation)

U1 U2 U3 U4 U5 U6 U8 U9 Ud 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 heatsink Abnormality of power module Abnormality in outdoor fan motor Abnormality of voltage Overheat protection Compressor overcurrent interruption (When Comp. locked) Current sensor error Abnormal low pressure Compressor overcurrent interruption Abnormality of indoor units Communication error of M-NET system

[When optional 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

1ON23456

Display detail

Explanation for display Unit

(Be sure that 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) Operation mode display.

(Lighting)

LED1

The tens digit : Operation mode

Display Operation Model

O C H

+C5 is displayed during replacement opera-

tion.

Display 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.

OFF / FAN

COOLING / DRY +

HEATING

DEFROSTING

The ones digit : Relay output

Display

0 1 2 3 4 5 6 7 8 A

Warming-up

Compressor

— — — — — — —

— ON ON

Compressor

— — —

— ON ON ON ON

—

SW2

4-way valve

—

— ON ON

—

— ON ON

— ON

(Initial setting)

Solenoid valve

—

— —

Display

E0~E7

Inspection unit

Outdoor unit

Indoor unit 1

Indoor unit 2

Indoor unit 3

Indoor unit 4

Contents to be inspected (When power is turned on)

63H connector(yellow) is open.

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

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

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

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

Startup time over

Communication error except for outdoor unit

Page 65

SW2 setting

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.



1ON23456

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 +Omit the figures after the decimal fractions.



Step

100 times

10 hours

1ON23456

Compressor operating frequency 0~255

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-A opening 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

Page 66

SW2 setting

1ON23456

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.



1ON23456

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

1ON23456

Thermo ON time 0~999

Test run elapsed time 0~120

LEV-B opening pulse 0~480

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.

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.

Minute

Pulse

Page 67

SW2 setting

1ON23456

Capacity

RP200 RP250

Code

40 50

1ON23456

Display detail

The number of connected indoor units

Explanation for display

0~4 (The number of connected indoor units are displayed.)

Unit

1ON23456

Capacity setting display

Outdoor unit setting information

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

Displayed as an outdoor capacity code.

• The tens digit (Total display for applied setting)

Setting details

H·P /

Cooling only

Single phase / 3 phase

Display details

0 : H·P 1 : Cooling only

0 :

Single phase

2 : 3 phase

• The ones digit Setting details

Defrosting switch

(Example) When heat pump, 3 phase and defrosting

– 39~88 (When the temperature is 0 or less, “–” and temperature are displayed by turns.)

0 : Normal 1 : For high humidity

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

Display details

Code

display

Code

display



1ON23456

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.)

8~39



Page 68

SW2 setting

Normal Overvoltage error Undervoltage error Input current sensor error L

1-phase open error

Abnormal power synchronous signal

 Display examples for multiple errors: Overvoltage (01) + Undervoltage (02) = 03 Undervoltage (02) + Power-sync signal error (08) = 0A

Power circuit board Power circuit board

Controller circuit board

Power circuit board

—

Description Detection point Display

00 01 02

1ON23456

Display detail

Indoor setting temperature 17~30

Explanation for display Unit

17~30



1ON23456

Outdoor pipe temperature / 2-phase (TH6)

-39~88

Outdoor ambient temperature (TH7)

-39~88

Outdoor heatsink temperature (TH8)

-40~200

Discharge superheat SHd 0~255

Cooling = TH4-TH6 Heating = TH4-TH5

Subcool SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH4

-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

1ON23456

U9 Error status

1ON23456

DC bus voltage 300-750

0~500 (When it is 100 or more, hundreds digit, tens digit and ones digit are displayed by turns.)

0.1 A

Code

display

300-750 (When it is 100V or more, hundreds digit, tens digit and ones digit are displayed by turns.)

Page 69

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

0~255 (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 / 2-phase (TH6) 7: Outdoor ambient temperature (TH7) 8: Outdoor heatsink (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

Page 70

SW2 setting

1ON23456

Display detail

LEV-A opening 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

1ON23456

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 / 2 phase (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.



1ON23456

Outdoor ambient temperature (TH7) on error occurring

-39~88

Outdoor heatsink 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.)



Page 71

SW2 setting

1ON23456

Display detail

Discharge superheat 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.



1ON23456

Subcool on error occurring SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH2

Thermo-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.)

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



Minute



U9 Error status during the Error postponement period

Description Detection point Display

Normal Overvoltage error Undervoltage error Input current sensor error L

1-phase open error

Abnormal power synchronous signal

 Display examples for multiple errors: Overvoltage (01) + Undervoltage (02) = 03 Undervoltage (02) + Power-sync signal error (08) = 0A

Power circuit board Power circuit board

Controller circuit board

Power circuit board

—

00 01 02

Code

display

Page 72

SW2 setting

Display

Compressor operating frequency control

Display

Compressor operating frequency control

Primary current control Secondary current control

1 2

•

The tens digit

•

The ones digit

(In this digit, the total number of

activated control is displayed.)

Preventive control for excessive temperature rise of discharge temperature Preventive control for excessive temperature rise of condensing temperature Frosting preventing control

Preventive control for excessive temperature rise of radiator panel

(Example) The following controls are activated.

• Primary current control

• Preventive control for excessive tempe rature rise of condensing temperature

• Preventive control for excessive tempe rature rise of heatsink



LED

1ON23456

Display detail

Controlling status of compressor operating frequency

Explanation for display Unit

The following code will be a help to know the operating status of unit.

Code

display

Indoor pipe temperature / Liquid (TH2(4)) Indoor 4

1ON23456

– 39~88

Indoor pipe temperature / (Cond./Eva.) (TH5(4)) Indoor 4 – 39~88

Replacement operation +If replacement operation is conducted even once, "1" is displayed. If replacement operation is less than 2 hrs, "0" is displayed.

– 39~88 (When the temperature is 0°C or less, “–” and temperature are displayed by turns.)

1: Conducted 0: Not yet



—

Page 73

11 FUNCTION SETTING

Function

Settings

Mode No.

Setting No.

: Initial setting

(when sent from the factory)

Remarks

Power failure automatic recovery Indoor temperature detecting 1

LOSSNAY connectivity

Power supply voltage Auto operating mode Frost prevention temperature Humidifier control

Change of defrosting control

OFF ON Average data from each indoor unit Data from the indoor unit with remote controller Data from main remote controller Not supported Supported

(Indoor unit does not intake outdoor air through LOSSNAY

)

Supported

(Indoor unit intakes outdoor air through LOSSNAY) 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 1 2 3 1 2 3 1 2 1 2 1 2 1 2 1 2

The setting is applied to all the units in the same refrigerant system.

11-1. UNIT FUNCTION SETTING BY 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. (1) Functions available when setting the unit number to 00 (Select 00 referring to  set the indoor unit number.) 1 The functions below are available only when the wired remote controller is used. The functions are not available for

floor standing models.

<Table 1> Function selections

Meaning of "Function setting" Mode02:indoor temperature detecting

No.

No.1

No.2

No.3

OUTDOOR

INDOOR

Indoor temperature(ta)=

REMOTE (SUB)

Average data of the sensor on all the

REMOTE (MAIN)

Initial

ta=(A+B)/2 ta=(A+B)/2 ta=A ta=A

setting

indoor units

Data of the sensor

ta=A ta=B ta=A ta=A on the indoor unit that connected with remote controller

Data of the sensor

ta=C ta=C ta=C ta=C on main remote controller

OUTDOOR

INDOOR

REMOTE (MAIN)

OUTDOOR

INDOOR

REMOTE (SUB)

INDOOR

REMOTE (MAIN)

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

Page 74

(2) Functions available when setting the unit number to 01-04 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  setting the

unit number of Operating Procedure.

• When setting functions for a simultaneous twin/triple/quadruple indoor unit system, set the unit number to 01 to 04 for

each indoor unit in case of selecting different functions for each unit referring to  setting the indoor unit number of Operating Procedure.

• When setting the same functions for an entire simultaneous twin/triple/quadruple indoor unit system, set refrigerant

address to AL (07 in case of wireless remote controller) referring to  setting the indoor unit number of Operating Procedure.

: Initial setting (Factory setting

Mode

Function Settings

Filter sign 100h 1

Airflow (

Fan speed

No.of air outlets 4 directions 1 - - - -

Optional high efficiency filter Vane setting

Energy saving air Disabled flow(Heating mode

Optional humidifier (

PLA only

Vane differential setting in heating mode (

cold wind prevention

Swing Not available Swing

Set temperature in heating mode(4 deg up

Fan speed during the Extra low 1 heating thermo OFF

Fan speed during the cooling thermo OFF

Detection of abnormality of the pipe temperature (P8)Not available

)

2500h 07 2

No filter sign indicator Quiet Standard High ceiling

3 directions 09 2 - - - 2 directions Not supported Supported

No vanes Vane No.1 setting Vane No.2 setting

)

Enabled Not supported Supported

No.1 setting (TH5: 24-28

No.2 setting (Standard,TH5:28-32

)

No.3 setting (TH5: 32-38

Available Wave air flow Available Not available

Stop Set fan speed Set fan speed Stop Available

(

Vane No.3 setting : PLA only

)

PLA-BA

}

Temperature correction: Valid Temperature correction: Invalid

)

PLA-BA

}

Setting

No.

08 2 - - -

11 2 - - -

14 2 - -

25 2

4-Way

cassette

PLA-BA

3 1- --

3- --

3- --1 2

1- --

3- -1 2 1 2

1- -

3- 1 2 1 2

3 1 2 1 2

PEAD-EA(2)

PEAD-GA

---

----

Ceiling

concealed

PEA-GA

- : Not available

Ceiling suspended

PCA-GA(2)

)

PCA-HA

mounted

PKA-GAL

PKA-FAL(2)

Wall

Mode No.11

Setting No. Settings PLA-BA PCA-GA(2)

Vane No.3 setting No Vanes

Less smudging (

Downward position than the standard

)

No vane function

2 Vane No.1 setting Standard Standard

3 Vane No.2 setting

Less draft * (

Upward position than the standard

)

Less draft * (

Upward position than the standard

* Be careful of the smudge on ceiling.

)

Page 75

11-1-1. Selecting functions using the wired remote controller

First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room temperature detection position is given. For actual operations, refer to steps  to  .

Setting number

Mode number



Refrigerant address Unit number













Selecting functions using the wired remote controller



Check the function selection setting.



Switch to function setting mode.



(Press

and  at the same time

For modes 15 and higher, press

with the remote controller stopped.)



Specify refrigerant address 00 (outdoor unit).



Specify unit No. 00. (indoor unit)



(Use



Select mode No. 02

and .)



Enter the setting.

(Press



(Specified indoor unit:

BLOW operation)

(room temperature detection position).



Select setting No. 03 (remote controller fixed).



(Use

and .)





and  at the same time.

Modes 01 to 14 can be activated



and

by pressing buttons



simultaneously, and modes 15 to 28 by pressing buttons



and .

YES

Change refrigerant address or unit No.



Enter the setting.

(Press



Example: Selecting room temperature detection position

Finished

YES



End function display.



(Press

and  at the same time.)

The above procedure must be carried out only if changes are necessary.



Page 76

[Operating Procedure]

 Check the setting items provided by function selection.

If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps  to  , fill in the "Check" column in Table 1, then change them as necessary. For initial settings, refer to the indoor unit's installation manual.

 Switch off the remote controller.

 Hold down the ( mode is 15 to 28)and 

buttons simultaneously for at least 2 seconds. will start to blink,

then the remote controller's display content will change as shown below.

* If the unit stops after

Check to see if there are any sources of noise or interference near the transmission path.

Note If you have made operational mistakes during this procedure, exit function selection (see step  ) then restart from step  .

 Set the indoor unit number.

 Press the

area.

FILTER

Refrigerant address display section

FUNCTION SELECTION

ON/OFF

button so that "- -" blinks in the unit number display

Unit number

display section

FUNCTION SELECTION

blinked for 2 seconds or "88" blinks in the room temperature display area for 2 seconds, a transmission error may have occurred.

TEST

 Set the outdoor unit's refrigerant address.

 Press the [

refrigerant address. The refrigerant address changes from "00" to "15". (This operation is not possible for single refrigerant systems.)

 Press the [

of the indoor unit for which you want to perform function selection. The unit number changes to "00", "01", "02","03",04" and "AL" each time a button is pressed.

CLOCK] buttons ( and ) to select the desired

CLOCK] buttons ( and ) to select the unit number

* To set modes 01 to 06 or 15 to 22, select unit number "00". * To set modes 07 to 14 or 23 to 28, carry out as follows:

• To set each indoor unit individually, select "01" to "04".

• To set all the indoor units collectively, select "AL".

 Confirm the refrigerant address and unit number.

 Press the

number. After a while, "- - " will start to blink in the mode number display area.

* "88" will blink in the room temperature display area if the selected refrigerant

address does not exist in the system. Furthermore, if refrigerant address display area also blinks, there are no units that correspond to the selected unit number. In this case, the refrigerant address and unit number may be incorrect, so repeat steps  and  to set the correct ones.

 Select the mode number.

 Press the [

number. (Only the selectable mode numbers can be selected.)

 Select the setting content for the selected mode.

 Press the

blink, so check the currently set content.

MODE

Mode number display section

button to confirm the refrigerant address and unit

"F"

appears and blinks in the unit number display area and the

TEMP] buttons ( and ) to set the desired mode

button. The currently selected setting number will

 When the refrigerant address and unit number are confirmed by pressing the

MODE

helps you find the location of the indoor unit for which you want to perform function selection. However, if "00" or "AL" is selected as the unit number, all the indoor units corresponding to the specified refrigerant address will start fan operation.

Example) When the refrigerant address is set to 00 and the unit number is 02.

Designate operation

* When grouping different refrigerant systems, if an indoor unit other than the

one to which the refrigerant address has been set to perform fan operation, there may be another refrigerant address that is the same as the specified one. In this case, check the DIP switch of the outdoor unit to see whether such a refrigerant address exists.

Mode number display section

 Press the [

number.

button, the corresponding indoor unit will start fan operation. This

00 refrigerant address

Outdoor unit

Indoor unit

TEMP] buttons ( and ) to select the desired setting

Unit number 01 Unit number 02

Remote controller

Mode number 02 = Indoor tempreture detection

Fan draft

Unit number 03

Setting number display section

 Register the settings you have made in steps  to  .

 Press the

to blink and registration starts.

* If " - - - " is displayed for both the mode number and setting number and "

Check to see if there are any sources of noise or interference near the transmission path.

 If you wish to continue to select other functions, repeat steps  to  .

 Complete function selection.

 Hold down the ( mode is 15 to 28) and buttons

simultaneously for at least 2 seconds. After a while, the function selection screen will disappear and the air condi-

tioner OFF screen will reappear.

Note If a function of an indoor unit is changed by function selection after installation is complete, make sure that a " " mark, etc., is given in the "Check" column of Table 1 to indicate the change.

MODE

button. The mode number and setting number will start

FILTER

Setting number 1 = Indoor unit operating average

The mode number and setting number will stop blinking and remain lit, indicating the end of registration.

" blinks in the room temperature display area, a transmission error may have occurred.

TEST

* Do not operate the remote controller for at least 30 seconds after completing

function selection. (No operations will be accepted even if they are made.)

Setting number 3 = Remote controller built-in sensor

Page 77

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.

 Check the function selection setting.

 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 CHECK button twice to display "CHECK".

 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 cannot specify the refrigerant address.



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

 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.

 Select setting No. "02" (OFF). (Set address "02" while still in troubleshooting mode, then press the HOUR button.)

Change unit No.

YES



11-1-2. Selecting functions using the wireless remote controller (Type C)

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]

CHECK

SET

FAN

VANE

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

CLOCK

min

HOUR button

MINUTE button

ON/OFF button

Check button

ON/OFF

MODE

CHECK

TEST RUN

[Operating instructions]

 Check the function settings. 3UHVVWKHEXWWRQWZLFHFRQWLQXRXVO\ĺ&+(&.LVOLWDQG³´EOLQNV

Press the temp button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

CHECK

 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.

min

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 ping sound” may be heard. Reenter the unit number setting.

 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.

 ĺ7KHVHQVRURSHUDWLRQLQGLFDWRUZLOOEOLQNDQGEHHSVZLOOEHKHDUGWRLQGLFDWHWKHFXUUHQWVHWWLQJQXPEHU

Current setting number: 1 = 1 beep (one second) 2 = 2 beeps (one second each) 3 = 3 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 ping sound” may be heard. Reenter the mode

number.  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.

 ĺ7KHVHQVRURSHUDWLRQLQGLFDWRUZLOOEOLQNDQGEHHSVZLOOEHKHDUGWRLQGLFDWHWKHVHWWLQJQXPEHU

Setting number: 1 = 2 beeps (0.4 seconds each) 2 = 2 beeps (0.4 seconds each, repeated twice) 3 = 2 beeps (0.4 seconds each, repeated 3 times) * If a setting number that cannot be recognized by the unit is entered, the setting will turn back to the original setting.

If the signal was not received by the sensor, you will not hear a beep or a “double ping sound” may be heard. Reenter the setting number.

 Repeat steps  and  to make an additional setting without changing unit number.  Repeat steps  to  to change unit number and make function settings on it.  Complete the function settings.

Press button. * Do not use the wireless remote controller for 30 seconds after completing the function setting.

min

Page 78

11-2. FUNCTION SELECTION OF REMOTE CONTROLLER

The setting of the following remote controller functions can be changed using the remote controller function selection mode. Change the setting when needed.

Item 1

1.Change language ("CHANGE LANGUAGE")

2.Function limit ("FUNCTION SELECTION")

3.Mode selection ("MODE SELECTION")

4.Display change ("DISP MODE SETTING")

Language setting to display

(1)

Operation function limit setting (operation lock) ("LOCKING FUNCTION")

(2)

Use of automatic mode setting ("SELECT AUTO MODE")

(3)

Temperature range limit setting ("LIMIT TEMP FUNCTION")

(1)

Remote controller main/sub setting ("CONTROLLER MAIN/SUB")

(2) Use of clock setting ("CLOCK") (3) Timer function setting ("WEEKLY TIMER") (4) Contact number setting for error situation ("CALL.")

(1) Temperature display /F setting ("TEMP MODE /F") (2)

Room air temperature display setting ("ROOM TEMP DISP SELECT")

(3)

Automatic cooling/heating display setting ("AUTO MODE DISP C/H")

[Function selection flowchart] Refer to next page. [1] Stop the air conditioner to start remote controller function selection mode. [2] Select from item1. [3] Select from item2. [4] Make the setting. (Details are specified in item3) [5] Setting completed. [6] Change the display to the normal one. (End)



[Detailed setting] [4] -1. CHANGE LANGUAGE setting

The language that appears on the dot display can be selected.

• Press the [

MENU] button to change the language.

 Japanese (JP),  English (GB),  German (D),  Spanish (E),  Russian (RU), Italian (I), Chinese (CH),? French (F)

[4] -2. Function limit (1) Operation function limit setting (operation lock)

• To switch the setting, press the [ ON/OFF] button.  no1 : Operation lock setting is made on all buttons other than

the [

ON/OFF] button.

 no2 : Operation lock setting is made on all buttons.  OFF (Initial setting value) : Operation lock setting is not made

* To make the operation lock setting valid on the normal screen, it is

necessary to press buttons (Press and hold down the [FILTER] and [ ON/OFF] buttons at the same time for 2 seconds.) on the normal screen after the above setting is made..

(2) Use of automatic mode setting When the remote controller is connected to the unit that has automatic operation mode, the following settings can be made.

• To switch the setting, press the [ ON/OFF] button.  ON (Initial setting value) : The automatic mode is displayed when

the operation mode is selected.

 OFF : The automatic mode is not displayed

when the operation mode is selected.

(3) Temperature range limit setting After this setting is made, the temperature can be changed within the set range.

• To switch the setting, press the [ ON/OFF] button.  LIMIT TEMP COOL MODE :

The temperature range can be changed on cooling/dry mode.

 LIMIT TEMP HEAT MODE :

The temperature range can be changed on heating mode.

 LIMIT TEMP AUTO MODE :

The temperature range can be changed on automatic mode.

 OFF (initial setting) : The temperature range limit is not active.

When the setting, other than OFF, is made, the temperature range limit setting

on cooling, heating and automatic mode is made at the same time. However the range cannot be limited when the set temperature range has not changed.

•

To increase or decrease the temperature, press the [ TEMP ( ) or ( )] button.

•

To switch the upper limit setting and the lower limit setting, press the button. The selected setting will flash and the temperature can be set.

• Settable range

Cooling/Dry mode : Lower limit: 19  ~ 30  Upper limit: 30  ~ 19  Heating mode : Lower limit: 17  ~ 28  Upper limit: 28  ~ 17  Automatic mode : Lower limit: 19  ~ 28  Upper limit: 28  ~ 19 

Item 2

[ ]

• Display in multiple languages is possible.

• Setting the range of operation limit (operation lock)

• Setting the use or non-use of "automatic" operation mode

• Setting the temperature adjustable range (maximum, minimum)

• Selecting main or sub remote controller *

When two remote controllers are connected to one group, one controller must be set to sub.

• Setting the use or non-use of clock function

• Setting the timer type

• Contact number display in case of error

• Setting the telephone number

• Setting the temperature unit ( or F) to display

• Setting the use or non-use of the display of indoor (suction) air temperature

• Setting the use or non-use of the display of "Cooling" or "Heating" display during

operation with automatic mode

Item 3 (Setting content)



[4] -3. Mode selection setting (1) Remote controller main/sub setting

• To switch the setting, press the [

ON/OFF] button.

 Main : The controller will be the main controller.  Sub : The controller will be the sub controller.

(2) Use of clock setting

• To switch the setting, press the [

ON/OFF] button.

 ON : The clock function can be used.  OFF: The clock function cannot be used.

(3) Timer function setting

• To switch the setting, press the [

ON/OFF] button (Choose one of

the followings.).

 WEEKLY TIMER (initial setting):

The weekly timer can be used.

 AUTO OFF TIMER: The auto off timer can be used.

SIMPLE TIMER:

The simple timer can be used.

TIMER MODE OFF: The timer mode cannot be used.

* When the use of clock setting is OFF, the "WEEKLY TIMER" cannot be

used.

(4) Contact number setting for error situation

• To switch the setting, press the [  CALL OFF :

The set contact numbers are not displayed in case of error.

ON/OFF] button.

 CALL **** *** **** : The set contact numbers are displayed in case

of error.

CALL_ : The contact number can be set when the display is as

shown on the left.

• Setting the contact numbers To set the contact numbers, follow the following procedures. Move the flashing cursor to set numbers. Press the [

)] button to move the cursor to the right (left). Press the [ CLOCK

( (

) and ( )] button to set the numbers.

TEMP. ( ) and

[4] -4. Display change setting (1) Temperature display / F setting

• To switch the setting, press the [

ON/OFF] button.

  : The temperature unit  is used.  F: The temperature unit F is used.

(2) Room air temperature display setting

• To switch the setting, press the [ ON/OFF] button.

ON : The room air temperature is displayed. OFF : The room air temperature is not displayed.

(3) Automatic cooling/heating display setting

• To switch the setting, press the [

ON/OFF] button.

 ON : One of "Automatic cooling" and "Automatic heating" is displayed

under the automatic mode is running.

 OFF: Only "Automatic" is displayed under the automatic mode.

Page 79

[Function selection flowchart]

Setting language (English)

Change Language

Normal display (Display when the air conditioner is not running)

Hold down the button and press the button for 2 seconds.

Remote controller function selection mode



Item 2Item 1

English



German

Spanish

Russian





Italian

Chinese

French

Hold down the button and press the button for 2 seconds.



Press the operation mode button.



Press theTIMER MENU button.



Press theTIMER ON/OFF button.

Dot display



TEMP.



PAR-21MAA



BACK DAY

MONITOR/SET

CLOCK

ON/OFF

OPERATION

ON/OFF

CHECK

CLEAR



FILTER



TEST







Function selection

Mode selection

Display mode setting

Japanese

















Item 3



OFF

no1

Operation lock setting is not used. (Initial setting value)



Operation lock setting is except On/Off button.



no2



OFF



OFF



OFF



OFF



CALL-



°C



°F



OFF



OFF



Operation lock setting is all buttons.

The automatic mode is displayed when the operation mode is selected. (Initial setting value)



The automatic mode is not displayed when the operation mode is selected.

The temperature range limit is not active. (Initial setting value)



The temperature range can be changed on cooling/dry mode.

The temperature range can be changed on heating mode.

The temperature range can be changed on automatic mode.

Automatic filter elevation panel up/down operation mode

Not necessary to set this mode. Refer to OPERATION MANUAL of Optional Parts (Panel) for details on operation.

Fixed air flow direction mode

Not necessary to set this mode. Refer to OPERATION MANUAL of indoor unit for details on operation.

The remote controller will be the main controller. (Initial setting value)



The remote controller will be the sub controller.

The clock function can be used. (Initial setting value)



The clock function cannot be used.

Weekly timer can be used. (Initial setting value)



Auto off timer can be used.

Simple timer can be used.

Timer mode cannot be used.

The set contact numbers are not displayed in case of error. (Initial setting value)



The set contact numbers are displayed in case of error.

The temperature unit °C is used. (Initial setting value)



The temperature unit °F is used.

Room air temperature is displayed. (Initial setting value)



Room air temperature is not displayed.

One of “Automatic cooling” and “Automatic heating” is displayed under the automatic mode is running. (Initial setting value)



Only “Automatic” is displayed under the automatic mode.

Page 80

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

12-1. HOW TO "MONITOR THE OPERATION DATA"

• Turning on the [Monitoring the operation data]





(3)



Example) Request code "004"

'LVFKDUJHWHPSHUDWXUHÛ&

Refrigerant address "00"



(7)

(5)

(1)

(2)

(4)

(1) Press the

(2) Press the

Note)

Operating the service inspection monitor

- - - ] appears on the screen (at

[ (The display (at

(3) Press the [TEMP] buttons (

[Screen

(4) Press the [CLOCK] buttons (

(5) Press the

(The requested data will be displayed at

Data collected during operation of the remote controller will be displayed. The collected data such as temperature data will not be updated automatically even if the data changes. To display the updated data, carry out step (4) again.

TEST

CHECK

It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while "

since no buttons are operative.





]

FILTER

button for 3 seconds so that [ Maintenance mode] appears on the screen (at ).

button for 3 seconds to switch to [Maintenance monitor].



) when [Maintenance monitor] is activated.

) now allows you to set a request code No.)

and ) to select the desired refrigerant address.

and ) to set the desired request code No.

button to perform data request.



in the same way as in maintenance mode.)

(6)

A: Maintenance mode B: Refrigerant address C: Data display area D: Request code display area

- - - -"

is blinking)

Canceling the Monitoring the operation data

(6) While [Maintenance monitor] is displayed, press the

(7) To return to normal mode, press the

ON/OFF

CHECK

button.

button for 3 seconds to return to maintenance mode.

Page 81

12-2. REQUEST CODE LIST

* Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.

Request content

Request code

Operation state

Compressor-Operating current (rms)

Compressor-Accumulated operating time

Compressor-Number of operation times

Discharge temperature (TH4)

Outdoor unit - Liquid pipe 1 temperature (TH3)

Outdoor unit - Liquid pipe 2 temperature

Outdoor unit-2-phase pipe temperature (TH6)

Outdoor unit-Outside air temperature (TH7)

Outdoor unit-Heatsink temperature (TH8)

Discharge superheat (SHd)

Sub-cool (SC)

Compressor-Operating frequency

Compressor-Target operating frequency

Outdoor unit-Fan output step

Outdoor unit-Fan 1 speed

(Only for air conditioners with DC fan motor)

Outdoor unit-Fan 2 speed

(Only for air conditioners with DC fan motor)

LEV (A) opening

LEV (B) opening

Primary current

DC bus voltage

Number of connected indoor units

Indoor unit-Setting temperature

Indoor unit-Intake air temperature <Measured by thermostat>

Indoor unit-Intake air temperature (Unit No. 1)

Indoor unit-Intake air temperature (Unit No. 2)

Indoor unit-Intake air temperature (Unit No. 3)

Indoor unit-Intake air temperature (Unit No. 4)

Indoor unit - Liquid pipe temperature (Unit No. 1)

Indoor unit - Liquid pipe temperature (Unit No. 2)

Indoor unit - Liquid pipe temperature (Unit No. 3)

Indoor unit - Liquid pipe temperature (Unit No. 4)

Indoor unit-Cond./Eva. pipe temperature (Unit No. 1)

Indoor unit-Cond./Eva. pipe temperature (Unit No. 2)

Indoor unit-Cond./Eva. pipe temperature (Unit No. 3)

Indoor unit-Cond./Eva. pipe temperature (Unit No. 4)

Thermo ON operating time

Test run elapsed time

Description

(Display range)

Refer to 12-2-1. Detail Contents in Request Code.

0 – 50

0 – 9999

3 – 217

-40 – 90

-39 – 88

-40 – 200

0 – 255

0 – 130

0 – 255

0 – 10

0 – 9999

0 – 500

0 – 50

180 – 370

0– 4

17 – 30

8 – 39

-39 – 88

0 – 999

0 – 120

Unit Remarks

10 hours

100 times

   

 

Step

rpm

Pulses

Units

 



   

Minutes

–

"0" is displayed if the air conditioner is a single-fan type.

"0" is displayed if the target unit is not present.

is displayed if the target unit is not present.

"0"

is displayed if the target unit is not present.

"0"

Not possible to activate maintenance mode during the test run.

Page 82

Request content

Request code

Indoor unit-Control state

Outdoor unit-Control state

Compressor-Frequency control state

Outdoor unit-Fan control state

Actuator output state

Error content (U9)

Signal transmission demand capacity

Contact demand capacity

External input state (silent mode, etc.)

Outdoor unit-Capacity setting display

Outdoor unit-Setting information

Outdoor unit-SW1 setting information

Outdoor unit-SW2 setting information

Outdoor unit-SW4 setting information

Outdoor unit-SW5 setting information

Outdoor unit-SW6 setting information

Outdoor unit-SW7 setting information

Outdoor unit-SW8 setting information

Outdoor unit-SW9 setting information

Outdoor unit-SW10 setting information

M-NET adapter connection (presence/absence)

Display of execution of replace/wash operation

Outdoor unit-Microcomputer version information

Outdoor unit-Microcomputer version information (sub No.)

Outdoor unit - Error postponement history 1 (latest)

100

Outdoor unit - Error postponement history 2 (previous)

101

Outdoor unit - Error postponement history 3 (last but one)

102

Description

(Display range)

Refer to 12-2-1.Detail Contents in Request Code.

0 – 255

Refer to 12-2-1.Detail Contents in Request Code.

"0000": Not connected "0001": Connected

"0000": Not washed "0001": Washed

"0501"

Auxiliary information (displayed after

version information)

Displays postponement code. (" - - " is

displayed if no postponement code is present)

Displays postponement code. (" - - " is

displayed if no postponement code is present)

Displays postponement code. (" - - " is

displayed if no postponement code is present)

"A000"

Code

Unit Remarks

–

Ver

–

Page 83

Request code

Request content

Description

(Display range)

Unit Remarks

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

146

147

148

149

150

151

152

Displays error history. (" - - " is displayed if no history is present.)

: TH3

6 : TH6

7 : TH7

8 : TH8

0 : No thermistor error

Displayed in the same way as request code "0".

0 – 50

0 – 9999

3 – 217

-40 – 90

-39 – 88

-40 – 200

0 – 255

0 – 130

0 – 255

0 – 10

0 – 9999

0 – 500

0 – 999

-39 – 88

Code

Sensor

number

–

10 hours

100 times

   

Step

rpm

Pulses

Minutes



  

"0" is displayed if the air conditioner is a single-

fan type.

Average value of all indoor units is displayed if the air condi-

tioner consists of two or more indoor units (twin, triple, quad).

Average value of all indoor units is displayed if the air condi-

tioner consists of two or more indoor units (twin, triple, quad).

Error history 1 (latest)

Error history 2 (second to last)

Error history 3 (third to last)

Abnormal thermistor display

(TH3/TH6/TH7/TH8)

Operation mode at time of error

Compressor-Operating current at time of error

Compressor-Accumulated operating time at time of error

Compressor-Number of operation times at time of error

Discharge temperature at time of error

Outdoor unit - Liquid pipe 1 temperature (TH3) at time of error

Outdoor unit - Liquid pipe 2 temperature at time of error

Outdoor unit-2-phase pipe temperature (TH6) at time of error

Outdoor unit-Outside air temperature (TH7) at time of error

Outdoor unit-Heatsink temperature (TH8) at time of error

Discharge superheat (SHd) at time of error

Sub-cool (SC) at time of error

Compressor-Operating frequency at time of error

Outdoor unit at time of error

• Fan output step

Outdoor unit at time of error

• Fan 1 speed (Only for air conditioners with DC fan)

Outdoor unit at time of error

• Fan 2 speed (Only for air conditioners with DC fan)

LEV (A) opening at time of error

LEV (B) opening at time of error

Thermostat ON time until operation stops due to error

Indoor - Liquid pipe temperature at time of error

Indoor-2-phase pipe temperature at time of error

Indoor at time of error

• Intake air temperature <Thermostat judge temperature>

Indoor-Actual intake air temperature

Indoor - Liquid pipe temperature

Indoor-2-phase pipe temperature

Page 84

Request content

Request code

153

Indoor-Fan operating time

154

(After filter is reset)

Indoor-Total operating time

155

(Fan motor ON time)

156

Indoor fan output value (Sj value)

157

Indoor fan output value

158

(Pulsation ON/OFF)

Indoor fan output value (duty value)

159

160

161

Indoor unit-Model setting information

162

Indoor unit-Capacity setting information

163

Indoor unit-SW3 information

164

Wireless pair No. (indoor control board side) setting

165

Indoor unit-SW5 information

166

167

189

Indoor unit-Microcomputer version information

190

Indoor unit-Microcomputer version information (sub No.)

191

192

764

Stable operation (Heat mode)

765

Stable operation (Cool mode)

766

Stable operation cancellation

767

Description

(Display range)

0 – 9999

0–

255

Fan control data

00 **" "**" indicates fan control data.

"00 **" "**" indicates fan control data.

Refer to 12-2-1 Detail Contents in Request Code.

Undefined

Refer to

12-2-1 Detail Contents in Request Code.

Undefined

Auxiliary information (displayed after version information)

This request code is not provided to collect data. It is used to fix the operation state.

This request code is not provided to collect data. It is used to cancel the operation state that has been

fixed by request codes "765" and "766".

Unit Remarks

1 hour

10 hours

For indoor fan phase control

–

For indoor fan pulsation control

–

For indoor DC brushless motor control

–

Ver

–

Page 85

12-2-1. Detail Contents in Request Code





[Operation state] (Request code ":0")

Data display

Relay output state

Operation mode

Display Operation mode

0 STOP • FAN C COOL • DRY H HEAT

d DEFROST

[Indoor unit – Control state] (Request code :" 50 ")

Data display

Unit No. 4 state

Unit No. 3 state

Unit No. 2 state

Unit No. 1 state



Example) Request code "004"

A: Maintenance mode display B: Refrigerant address



Relay output state

Display

0 1

2 3 4 5 6 7 8 A

Display State

0 Normal 1 Preparing for heat operation 2– 3– 4 Heater is ON. 5 Anti-freeze protection is ON. 6 Overheat protection is ON. 7 Requesting compressor to turn OFF F There are no corresponding units.

Power currently

supplied to compressor

–

ON ON

C: Data display area D: Request code display area

Compressor 4-way valve Solenoid valve

Discharge temperature 69  Refrigerant address "00"

–

ON ON ON ON

–

ON ON

–

[Outdoor unit – Control state] (Request code ":51")

Data display State 0 0 0 0 Normal 0 0 0 1 Preparing for heat operation 0 0 0 2 Defrost

[Compressor – Frequency control state] (Request code ":52")

Data display

Frequency control state

Display Current limit control

0 No current limit 1 Primary current limit control is ON. 2 Secondary current limit control is ON.



Frequency control state

Display





0 1 Controlled 2 Controlled 3 Controlled Controlled 4 Controlled 5 Controlled Controlled 6 Controlled Controlled 7 Controlled Controlled Controlled 8 Controlled

9 Controlled Controlled A Controlled Controlled b Controlled Controlled Controlled

C Controlled Controlled

d Controlled Controlled Controlled E Controlled Controlled Controlled F Controlled Controlled Controlled Controlled

Discharge temperature



Condensation temperature

overheat prevention

protection control

Anti-freeze

Heatsink temperature

overheat prevention

Page 86

[Fan control state] (Request code :" 53 ")

Data display

Fan step correction value by heatsink temperature overheat prevention control

Fan step correction value by cool condensation temperature overheat prevention control

Display Correction value

- (minus) – 1 00

+1 +2

[Actuator output state] (Request code :"54")

Data display

Actuator output state 

Actuator output state 

Actuator output state

Display SV1 Four-way valve Compressor

0 1 2 3 4 5 6 7 8 9 A b



ON ON

Compressor is

warming up

ON ON

Actuator output state

Display 52C SV2 SS

0 1 2 3 4 5 6 7



ON ON

ON ON ON ON

[Error content (U9)] (Request code :"55")

Data display

Error content 

Error content 

Error content

Display

0 1 2 3 4 5 6 7 8 9



Overvoltage Undervoltage L

error error open error

-phase

: Detected

Power synchronizing

signal error

Error content

Display

Converter Fo

0 1 2 3



error

: Detected

PAM error

Page 87

[Contact demand capacity] (Request code "61")

Data display

000

Setting content

[External input state] (Request code "62")

Data display

Input state

Input state : Input present

Display

Contact demand Silent mode Spare 1 Spare 2

input input input input 0 1 2 3 4 5 6 7 8 9

[Outdoor unit -– Capacity setting display] (Request code : "70")

Data display

Capacity

10 50

935

11 60 14 71 20 100 25 125 28 140 40 200 50 250

[Outdoor unit – Setting information] (Request code "71")

Data display

Setting information 

Setting information 

Setting information 

Display Defrost mode

0 Standard 1 For high humidity

Setting information 

Display

Single-/3-phase

Heat pump/

cooling only

Single-phase

Heat pump

Cooling only

3-phase

Heat pump

Cooling only

Setting content

Display Setting value

Setting

SW7-1 SW7-2 0 1 50%

2 75% ON

3 100%

000

Page 88

[Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82

0: Swich OFF 1: Swich ON

SW1, SW2, SW6, SW7

123456

000000 0000 100000 0001 010000 0002 110000 0003 001000 0004 101000 0005 011000 0006 111000 0007 000100 0008 100100 0009 010100 000A 110100 000b 001100 000C 1 0 1 1 0 0 00 0d 011100 000E 11 110 0 000F 000010 0010 100010 010010 110010 001010 101010 011010 111010 000110 100110 010110 11 011 0 00 111 0 10 111 0 01 111 0 11 111 0 000001 100001 010001 110001 001001 101001 011001 111001 000101 100101 010101 110101 001101 101101 011101 11 110 1 000011 100011 010011 110011 001011 101011 011011 111011 000111 100111 010111 11 011 1 00 111 1 10 111 1 01 111 1 11 111 1

Data display

00 11 00 12 00 13 00 14 00 15 00 16 00 17 00 18 00 19 00 1A 00 1B 00 1C 00 1D 00 1E 00 1F 00 20 00 21 00 22 00 23 00 24 00 25 00 26 00 27 00 28 00 29 00 2A 00 2B 00 2C 00 2D 00 2E 00 2F 00 30 00 31 00 32 00 33 00 34 00 35 00 36 00 37 00 38 00 39 00 3A 00 3B 00 3C 00 3D 00 3E 00 3F

0: Swich OFF 1: Swich ON

SW5

1234

0000 0000 1000 0001 0100 0002 1 1 0 0 00 03 0010 0004 1010 0005 0110 0006 1 1 1 0 00 07 0001 0008 1001 0009 0101 000A 1 1 0 1 00 0b 0011 000C 1 0 1 1 00 0d 0111 000E 11 11 000F

0: Swich OFF 1: Swich ON

SW8

123

000 0000 100 0001 010 0002 11 0 0003 001 0004 101 0005 011 0006 11 1 0007

0: Swich OFF 1: Swich ON

SW4, SW9, SW10

0 0 00 00 1 0 00 01 0 1 00 02 1 1 00 03

Data display

Page 89

[Indoor unit – Model setting information] (Request code : 162)

Data display

See the table on the right.

Display Model setting state Display Model setting state

00 PSA-RP·GA, PSH-PGAH 20 01 21 02

PEAD-RP·EA(2)/GA, PEHD-P·EAH 03 SEZ-KA·VA 04 24 05 SLZ-KA·VA(L) 25 06 PCA-RP·HA 26 07 27 08 28

PEA-RP400/500GA

09 29 0A 2A 0b 2b PKA-RP·GAL, PKH-P·GALH

PEA-RP200/250GA

0C 2C

0d 2d 0E 2E 0F 2F PLA-RP· AA 10 30 11 PEA-RP·EA 31 PLH-P·AAH 12 MEXZ-GA·VA(L) 32 13 33 14 34 15 35 16 36 17 37 18 38 19 39 1A 3A 1b 3b

1C 3C

1d 3d 1E 3E 1F 3F

PKA-RP·FAL(2), PKH-P·FALH

PCA-RP·GA(2), PCH-P·GAH, PLA-RP·BA

PLA-RP·AA2

[Indoor unit – Capacity setting information] (Request code 163 )

Data display

See the table on the right.

Display Capacity setting state Display Capacity setting state

00 12 10 112 01 16 11 125 02 22 12 140 03 25 13 04 28 14 05 32 15 06 35, 36 16 07 40 17 08 45 18 09 50 19 0A 56 1A 0b 63 1b

0C 71 1C

0d 80 1d 0E 90 1E 0F 100 1F

[Wireless pair No. (indoor control board side) setting] (Request code 165 )

Data display

See the table on the right.

Display Pair No. setting state

00 No. 0 01 No. 1 J41 disconnected 02 No. 2 J42 disconnected 03 No. 3 J41, J42 disconnected

Page 90

13 EASY MAINTENANCE FUNCTION

L Reduces maintenance work drastically. L Enables you to check operation data of the indoor and outdoor units by remote controller.

Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models.

Smooth Maintenance Function

Easy maintenance information (unit)

Compressor Outdoor unit Indoor unit

Accumulated operating



time

(%10 hours) temperature () temperature ()

Number of ON/OFF Discharge



times (%10 times) temperature ( ) temperature ( )

Operating Outside air Filter operating current (A) temperature () time* (Hours)

* The filter operating time is the time that has elapsed since the filter was reset.

Heat exchanger





Discharge temperature 64

Intake air



Heat exchanger







L Conventional inspection work

Outdoor unit

Remove the service panel.

Measure the discharge temperature.

Indoor unit

Measure the intake air temperature.

Measure the outside air temperature

13-1. MAINTENANCE MODE OPERATION METHOD

If you are going to use 13-2. "GUIDE FOR OPERATION CONDITION", set the airflow to "High" before activating maintenance mode.

L Switching to maintenance mode

Maintenance mode can be activated either when the air conditioner is operated or stopped. It cannot be activated during test run. + Maintenance information can be viewed even if the air conditioner is stopped.

N Remote controller button information





Compressor information

Operation mode

(1) Press the

[Display

TEST



]

MAINTENANCE

button for 3 seconds to switch to maintenance mode.

If stable operation is unnecessary or if you want to check the data with the air conditioner stopped, skip to step (4).

Outdoor unit information

 

Indoor unit information

Confirm

Activate/cancel maintenance mode

L Fixed Hz operation

The operating frequency can be fixed to stabilize operation of inverter model. If the air conditioner is currently stopped, start it by this operation.

(2) Press the

[Display

(3) Press the

[Display

MODE



]

FILTER



] Waiting for stabilization

button to select the desired operation mode.

Stable cooling operation

COOL STABLE MODE

Stable heating operation

HEAT STABLE MODE

Stable operation cancellation

STABLE MODE CANCEL

( ) button to confirm the setting.

Stabilized

After 10 to 20 minutes

Page 91

L Data measurement

ON/OFF

When the operation is stabilized, measure operation data as explained below.

(4) Press the [TEMP] buttons (

and ) to select the desired refrigerant address.

[Screen



]

(5) Select the type of data to be displayed.

After selecting, go to step (6).

Compressor information



button

Cumulative

 

]

operation time

COMP ON x10 HOURS

[Display

Outdoor unit information

button

Heat exchanger

 

[Display



]

temperature

OUTDOOR UNIT H·EXC. TEMP

Indoor unit information

button

Indoor room

 

[Display



]

temperature

INDOOR UNIT INLET TEMP

ON/OFF Number Operating current

COMP ON x100 TIMES

Comp. discharge temperature

OUTDOOR UNIT OUTLET TEMP

Heat exchanger temperature

INDOOR UNIT

H·EXC. TEMP

COMP ON CURRENT (A)

Outdoor ambient temperature

OUTDOOR UNIT OUTDOOR TEMP

Filter operating time

INDOOR UNIT FILTER USE H

(6) Press the

FILTER

( ) button to confirm the setting.

[Display example for accumulated operating time]

Display



Waiting for response

Blinking

After approx. 10 seconds

(7) Data is displayed on the display (at ).

To check the data for each item, repeat steps (5) to (7).

(8) To cancel maintenance mode, press the

TEST

N Refrigerant address Single refrigerant system

In the case of single refrigerant system, the refrigerant address is "00" and no operation is required. Simultaneous twin, triple and quadruple units belong to this category (Single refrigerant system).

[1:1]

Refrigerant address=00

Outdoor

unit

Indoor unit

[Twin]

Refrigerant address=00

Outdoor

unit

Indoor unit

12,340 hours

button for 3 seconds or press the

Multi refrigerant system (group control)

Up to 16 refrigerant systems (16 outdoor units) can be connected as a group by 1 remote controller. To check or set the refrigerant addresses.

Refrigerant address 00

Outdoor

unit

Indoor unit

Refrigerant address 01

Outdoor

unit

Indoor unit

Refrigerant address 02

Outdoor

unit

Indoor unit

button.

Refrigerant address 15

Outdoor

unit

Indoor unit

Remote

controller

Remote

controller

Remote

controller

Page 92

13-2. GUIDE FOR OPERATION CONDITION

Inspection item Result

Breaker Good Retightened

Terminal block Outdoor Unit Good Retightened

Loose con-

nection

(Insulation resistance) M

Power supply

(Voltage) V

 Accumulated operating time Time

 Number of ON/OFF times Times

Com-

pressor

 Current A



Refrigerant/heat exchanger temperature

Refrigerant/discharge temperature

  Air/outside air temperature COOL  HEAT 

(Air/discharge temperature) COOL  HEAT 

Temperature

Appearance Good

Outdoor Unit

Heat exchanger Good

Sound/vibration None Present

Cleanli-

ness

Air/intake air temperature COOL  HEAT 



(Air/discharge temperature) COOL  HEAT 



Refrigerant/heat exchanger temperature

Filter operating time* Time

Temperature



Decorative panel Good

Filter Good

Indoor Unit

Fan Good

Heat exchanger Good

Cleanliness

Sound/vibration None Present

* The filter operating time is the time that has elapsed since the filter was reset.

Indoor Unit Good Retightened

COOL  HEAT  COOL  HEAT 

Cleaning required

COOL  HEAT 

Cleaning required

Check Points

Enter the temperature differences between ,, and  into the graph given below. Operation state is determined according to the plotted areas on the graph. For data measurements, set the fan speed to "Hi" before activating maintenance mode.

Classification Item Result

Inspection

Temperature

Cool

difference

Inspection

Temperature

Heat

difference

* Fixed Hz operation may not be possible under the following tempera-

ture ranges. A)In cool mode, outdoor intake air temperature is 40  or higher or

indoor intake air temperature is 23  or lower.

B)In heat mode, outdoor intake air temperature is 20  or higher or

indoor intake air temperature is 25  or lower.

* If the air conditioner is operated at a temperature range other than the

ones above but operation is not stabilized after 30 minutes or more have elapsed, carry out inspection.

* In heat mode, the operation state may vary due to frost forming on the

outdoor heat exchanger.

Is "D000" displayed stably on the remote

controller?



Discharge temperature) – ( Outdoor

(

heat exchanger temperature)



Indoor intake air temperature) – (

(

Indoor heat exchanger temperature)

Is "D000" displayed stably on the remote

controller?

(



Discharge temperature) – ( Indoor

heat exchanger temperature)



Indoor heat exchanger temperature) –

(



Indoor intake air temperature)

Stable Unstable



Stable Unstable



Area Check item

Normal

Filter inspection

Inspection A

Inspection B

Inspection C

Normal operation state

Filter may be clogged. *1

Performance has dropped. Detailed in-

spection is necessary.

Refrigerant amount is dropping.

Filter or indoor heat exchanger may be

clogged.

Judgment

Cool Heat

* The above judgement is just a guide based on Japanese standard conditions. It may be changed depending on the indoor and outdoor temperature. *1 It may be judged as "Filter inspection" due to the outdoor and indoor temperature, even though it is not clogged.

Cool mode Heat mode



Indoor



Inspection C

Filter inspection

Normal

Inspection A

Indoor intake air temperature)— (



010 20304050607080

(

heat exchanger temperature)

Result

[ Discharge temperature] – [ Outdoor heat exchanger temperature)

Inspection B



Indoor heat exchanger temperature) —

Indoor intake air temperature)





(

[ Discharge temperature] – [ Indoor heat exchanger temperature)

Inspection C

Filter inspection

Normal

Inspection B

Inspection A

010 20304050607080



Page 93

14 DISASSEMBLY PROCEDURE

PUHZ-RP200YHA2 PUHZ-RP250YHA2

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, CNF1 and CNF2 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

Cover panel(front)

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 and power

supply wire from terminal block. (4) Disconnect the connectors on the controller circuit board. (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.)

Fan motor fixing screws

Electrical parts box

Electrical parts box fixing screw

Terminal block (TB1)

Terminal block (TB2)

Noise filter circuit board (N.F.)

Page 94

OPERATING PROCEDURE

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 2 wire clamps on top 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.6 below to remove thermistor <Outdoor>.

Photo 4

Electrical parts box

PHOTOS

Thermistor <Outdoor 2-phase pipe>(TH6)

Clamp

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 2 wire clamps on top 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.5 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 elec-

trical parts box.

[Removing the thermistor<Outdoor pipe>(TH3)]

(4) Pull out the thermistor <Outdoor pipe> (TH3) from the

sensor holder.

Photo 5

Lead wire of thermistor <Outdoor> (TH7)

Sensor holder

Photo 6 (Photo:PUHZ-RP250YHA2)

Thermistor <Outdoor pipe> (TH3)

Thermistor <Discharge> (TH4)

[Removing the thermistor<Discharge>(TH4)]

For RP200 (4) Remove the soundproof cover(upper) for compressor. (5) Pull out the thermistor <Discharge> (TH4) from the ther-

mo-holder of the compressor shell.

For RP250 (4) Pull out the thermistor <Discharge> (TH4) from the sen-

sor holder.

Soundproof cover(upper) for compressor

Compressor (MC)

Page 95

OPERATING PROCEDURE

7. Removing the 4-way valve coil (21S4) and linear expansion valve coil (LEV-A, LEV-B) and bypass valve coil(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 4-way valve coil]

(4) Remove 4-way valve coil fixing screw (M4 × 6). (5) Remove the 4-way valve coil by sliding the coil toward you.

[Removing the linear expansion valve coil]

(4) Remove the linear expansion valve coil by sliding the coil

upward.

[Removing the bypass valve coil]

(4) Remove bypass valve coil fixing screw (M4 × 6). (5) Remove the bypass valve coil by sliding the coil upward.

PHOTOS

Photo 7 (Photo:PUHZ-RP200YHA2)

Bypass valve coil fixing screw

Bypass valve coil

Bypass valve

Linear expansion valve coil(LEV-A)

Linear expansion valve

4-way valve coil

4-way valve

4-way valve coil fixing screw

8. Removing the 4-way valve and 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 valve bed fixing screws (4 × 10), 4 ball valve

and stop valve fixing screws (5 × 16) then remove the valve bed.

(5) Remove 3 right side panel fixing screws (5 × 10) in the

rear of the unit then remove the right side panel.

[Removing the 4-way valve]

(6) Remove the 4-way valve coil. (7) Recover refrigerant. (8) Remove the welded part of 4-way valve.

[Removing the bypass valve]

(6) Remove bypass valve coil.

(7) Recover refrigerant. (8) Remove the welded part of bypass valve.

9. Removing the 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), 4 ball valve

and stop valve fixing screws (5 × 16) then remove the valve bed.

(4) Remove 4 right side panel fixing screws (5 × 10) in the rear

of the unit then remove the right side panel. (5) Remove the linear expansion valve coil. (6) Recover refrigerant. (7) Remove the welded part of linear expansion valve.

Note 1: Recover 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 parts of refrigerant cir-

cuit, 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.

Page 96

OPERATING PROCEDURE

10. Removing the high pressure switch (63H)(63H1)(63H2) and the 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) Recover refrigerant. (6) Remove the welded part of high pressure switch and low

pressure switch.

63H(For RP200) 63H1, 63H2, 63L(For RP250)

Note 1: Recover 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 parts of refrigerant cir-

cuit, 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.

PHOTOS

Photo 8 (Photo:PUHZ-RP200YHA2)

High pressure switch

11. Removing the 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.

(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), 4 ball valve

and stop valve fixing screws (5 × 16), then remove the valve bed.

(7) Remove 3 right side panel fixing screws (5 × 10) in the

rear of the unit and remove the right side panel.

(8) Remove 3 separator fixing screws (4 × 10) and remove

the separator. (9) Remove the soundproof cover for compressor. (10) Remove the terminal cover and remove the compressor

lead wire. (11) Recover refrigerant. (12) Remove the 3 points of the compressor fixing nut using a

spanner or a adjustable wrench. (13) Remove the welded pipe of compressor inlet and outlet

and remove the compressor.

Note: Recover refrigerant without spreading it in the air.

Photo 9

Compressor terminal

Compressor (MC)

Soundproof cover

Compressor

fixing nut

Page 97

OPERATING PROCEDURE

12. Removing the accumulator(RP200)

(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.

(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), 4 ball valve

and stop valve fixing screws (5 × 16) then remove the

valve bed. (7) Remove 3 right side panel fixing screws (5 × 10) in the

rear of the unit and remove the right side panel. (8) Recover refrigerant. (9) Remove 2 welded pipes of accumulator inlet and outlet. (10) Remove 2 accumulator leg fixing screws (4 × 10).

Note: Recover refrigerant without spreading it in the air.

Photo 11

Inlet

Outlet

Photo 10

Valve bed fixing screw

Valve bed

Separator

Compressor

Separator fixing screw

Compressor fixing nuts

PHOTOS

Accumulator

Valve bed fixing screws

Accumulator leg fixing screws

Accumulator

13. Removing the power receiver(RP250)

(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. (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 screws (5 × 10) in the

rear of the unit and then remove the right side panel. (8) Recover refrigerant. (9) Remove 4 welded pipes of power receiver inlet and outlet. (10) Remove 2 receiver leg fixing screws (4 × 10).

Note: Recover refrigerant without spreading it in the air.

Photo 12

Compressor

(MC)

Pipes of power receiver

Receiver leg fixing screws

Power receiver

Receiver leg

Page 98

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

New publication, effective Nov. 2007 Specifications subject to change without notice

Mitsubishi PUHZ-RP200YHA2, PUHZ-RP250YHA2 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual