Mitsubishi PUHZ-P200YHA(3), PUHZ-P250YHA(3) Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A

Outdoor unit [model names]

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

[Service Ref.]

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

February 2009

No.OCH424

REVISED EDITION-A

Revision:

• PUHZ-P200/250YHA3

are added in REVISED EITION-A.

• Some descriptions have

been modified.

• Please void OCH424.

Note:

• This manual describes only

service data of the outdoor units.

• RoHS compliant products

have <G> mark on the spec name plate.

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

CONTENTS

1. TECHNICAL CHANGES

2. REFERENCE MANUAL

3. SAFETY PRECAUTION

4. FEATURES

5. SPECIFICATIONS

6. DATA

7. OUTLINES AND DIMENSIONS

8. WIRING DIAGRAM

9. WIRING SPECIFICATIONS

10.

REFRIGERANT SYSTEM DIAGRAM

11. TROUBLESHOOTING

12. FUNCTION SETTING

13.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

14. EASY MAINTENANCE FUNCTION

15. DISASSEMBLY PROCEDURE

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PARTS CATALOG (OCB424)

12 17 19 69

2 2 3 6 7

TECHNICAL CHANGES

PUHZ-P200YHA PUHZ-P200YHA3 PUHZ-P250YHA PUHZ-P200YHA3

• OUTDOOR CONTROLLER BOARD (C.B.) has been changed. (S/W has been changed: Corresponding to the additional combination between PKA-RP•HAL/KAL, PCA-RP•KA and PEAD-RP•JA(L))

REFERENCE MANUAL

INDOOR UNIT’S SERVICE MANUAL

Model name Service Ref.

PLA-RP35/50/60/71/100/125/140BA PLA-RP71/100/125/140BA2

PCA-RP50/60/71/100/125/140GA PCA-RP50/60/71/100/125/140GA(#1) PCA-RP50GA2 PCA-RP50GA2(#1)

PCA-RP71/125HA

PKA-RP35/50GAL PKA-RP35/50GAL(#1)

PKA-RP60/71/100FAL PKA-RP60/71/100FAL(#1) PKA-RP50FAL2 PKA-RP50FAL2(#1)

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

PEAD-RP60/71/100GA

PLA-RP35/50/60/71/100/125/140BA(#2).UK PLA-RP35/50/60/71BA PLA-RP71/100/125BA2.UK PLA-RP140BA2R1.UK

PCA-RP71/125HA(#1)

PEAD-RP50/60/71/125/140EA(#1).UK PEAD-RP35/100EA2(#1).UK

PEAD-RP60/71/100GA(#1).UK

1.UK

Service

Manual No.

OCH412 OCB412

OC328

OC329

OC330

OC331

HWE0521

HWE0506

PEA-RP200/250/400/500GA

PKA-RP60/71/100KAL

PCA-RP50/60/71/100/125/140KA

PKA-RP35/50HAL

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

PKA-RP60/71/100KAL.TH

PCA-RP50/60/71/100/125/140KA

PKA-RP35/50HAL

HWE0708A

OCH452

OCB452

OCH454

OCB454 OCH453

OCB453

SAFETY PRECAUTION

3-1. ALWAYS OBSERVE FOR SAFETY

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

3-2. 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 clean the pipes and make sure that the insides of the pipes are clean.

· 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 indoors during installation and 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

Handle 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.

[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

1 Gauge manifold · Only for R410A

· Use the existing fitting

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

2 Charge hose · Only for R410A

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

3 Electronic scale

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

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

6 Refrigerant charge base

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

· Cylinder with syphon

8 Refrigerant recovery equipment

specifications

. (UNF1/2)

Cautions for refrigerant piping work

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.

1Thickness of pipes Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7mm or below.)

Diagram below: Piping diameter and thickness

Nominal

dimensions(inch)

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

Outside

diameter

6.35

9.52

12.70

15.88

19.05

(mm)

Thickness

R410A R22

0.8

1.0

—

(mm)

0.8

1.0

2Dimensions of flare cutting and flare nut The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refriger ants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been speci fied 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)

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

Outside

diameter

6.35

9.52

12.70

15.88

19.05

Dimension A

R410A R22

9.1

13.2

16.6

19.7

24.0

(mm)

( )

-0.4

9.0

13.0

16.2

19.4

23.3

Flare nut dimensions

Nominal

dimensions(inch)

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

Outside

diameter

6.35

9.52

12.70

15.88

19.05

3Tools 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 Charge refrigerant 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

Tool exclusive for R410A

Tool exclusive for R410A Tools for other refrigerants can

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

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

Tool exclusive for R410A

oil

(minimum amount)

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Dimension B

(mm)

Dimension B

R410A R22

17.0

22.0

26.0

29.0

36.0

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)

17.0

22.0

24.0

27.0

36.0

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.

FEATURES

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

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

OUTDOOR UNIT

Airflow 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) kg(lbs)

mm(in.) mm(in.)

A A

/min(L/s

dB dB

PUHZ-P200YHA PUHZ-P200YHA3

Cooling

9.47

)

126(278)

5.8(12.8)

9.52(3/8)

25.4(1)

Heating

3 phase 50Hz, 400V

9.88

YHA: ANB52FFJMT or ANB52FFPMT

4.7

59 59

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

YHA3: ANB52FFPMT

Line start

HP switch

Discharge thermo

—

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

2.30(FV50S)

Flared

Flared & Brazing

Max. 30m Max. 70m

PUHZ-P250YHA PUHZ-P250YHA3

Cooling

11.0

YHA: 133(294)/ YHA3: 135(298)

7.1(15.7)

12.7(1/2)

25.4(1)

Heating

12.0

5.5

59 59

DATA

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

Service Ref.

PUHZ-P200YHA PUHZ-P200YHA3

PUHZ-P250YHA PUHZ-P250YHA3

10m

4.8

5.9

20m

5.3

6.5

6-2. COMPRESSOR TECHNICAL DATA

Unit

Compressor model

Winding

Resistance

(  )

U-V

U-W

W-V

PUHZ-P200, 250YHA PUHZ-P200, 250YHA3

ANB52FFJMT ANB52FFPMT

0.30

Piping length (one way)

30m

5.8

7.1

40m

6.7

8.3

For pipe longer than 30m, additional charge is required.

(at 20°C)

ANB52FFPMT

0.30

50m

7.6

9.5

60m

8.5

10.7

70m

9.4

11.9

Factory

charged

5.8

7.1

6-3. NOISE CRITERION CURVES

MICROPHONE

UNIT

1.5m

GROUND

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS

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

NOISE

63 125 250 500 1000 2000 4000 8000

SPL(dB)

MODE

COOLING

HEATING

BAND CENTER FREQUENCIES, Hz

LINE 59 59

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

6-4. STANDARD OPERATION DATA

Representative matching

Mode

Capacty

Total

Input

Indoor unit

Phase , Hz Voltage Input Current

Outdoor unit

Electrical circuitRefrigerant circuitIndoor side

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

side

Outdoor

SHF

D.B.

W.B.

D.B. D.B.

W.B.

V A

MPa

(kgf/%)

MPa

(kgf/%)

°C °C °C

m °C °C °C °C °C

PEA-RP250GAPEA-RP200GA

HeatingCooling

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

7.21 7.36 8.44 8.47

PEA-RP200GA

PUHZ-P200YHA

PUHZ-P200YHA3

2.96

(30.2)

0.87

(8.87)

0.81

3, 50

400

1.00

400

9.889.47

2.59

(26.4)

0.64

(6.53)

43.249.7

-0.88.0

7.57.5 2027 1519

35.717.1 735 624

— —

PEA-RP250GA

3, 50

400

1.18

2.302.00

PUHZ-P250YHA

PUHZ-P250YHA3

3, 503, 50

400

2.94

(30.0)

0.86

(8.75)

0.86

0.150.18

HeatingCooling

12.011.0

2.67

(27.2)

0.62

(6.32)

74.074.873.775.6

45.149.6

-2.37.1

7.57.5 2027 1519

39.115.4

— —

735 624

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

Rear piping cover

Front piping cover

Side Air Intake

Handle for moving

Piping Knockout Hole Details

637323

5527

4045

Power supply wiring hole

(2-:27Knockout)

Rear trunking hole

(Knockout)

Rear piping hole

(Knockout)

:92

922723

6373

4075

5519

Power supply wiring hole

(2-:27Knockout)

Right trunking hole

(Knockout)

Right piping hole

(Knockout)

:92

6373

5527

40 45

Power supply wiring hole

(2-:27Knockout)

Front trunking hole

(Knockout)

Front piping hole

(Knockout)

:92

Over

Less than

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

4 PIPING-WIRING DIRECTIONS

3 FOUNDATION BOLTS2 SERVICE SPACE

1 FREE SPACE (Around the unit)

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

purchased locally.)

Dimensions of space needed

for service access are

shown in the below diagram.

The diagram below shows a basic

example.

Explantion of particular details are

given in the installation manuals etc.

FOUNDATION

500

150

Service space

FREE

Over 10mm

Over 150mm

Ove

r 1000mm

40560

175600175

33030

37028 19

417

60 37

2-12%36 oval holes

(Foundation Bolt M10)

2-U Shaped notched holes

(foundation Bolt M10)

Side Air Intake

Rear Air Intake

Air Discharge

Installation Feet

999 995

*1 A

*2 339

950

322

371

635

1350

*1 439

Handle for moving

Terminal Connections

Left···Power supply wiring

Right···Indoor/Outdoor wiring

Service Panel

(

Earth terminal

Brazing





)

PUHZ-P250YHA

PUHZ-P250YHA3

PUHZ-P200YHA

PUHZ-P200YHA3

:9.52

(3/8 inch)

:12.7

(1/2 inch)

421

447





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



· · · ·Refrigerant LIQUID pipe connection (FLARE) *1· · · ·Indication of STOP VALVE connection location

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

Example of Notes

14514514522030

219

Drain hole

(5-:33)

Bottom piping hole

(Knockout)

Side Air Intake

Air Intake

Rear Air Intake

Handle for moving

7 OUTLINES AND DIMENSIONS

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

Unit : mm

8 WIRING DIAGRAM

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

[LEGEND]

SYMBOL TB1 TB2 Terminal Block<Indoor/Outdoor> MC MF1,MF2 21S4 63H TH3 TH4 TH6 TH7 LEV-A ACL4 DCL CB1,CB2 RS FUSE1, FUSE2 CY1,CY2 P.B.

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< Capacitor

Power Circuit Board Connection Terminal<U/V/W -Phase>

SC-U/V/W

C. B.

MF1

MF2

CNS

(WHT)

CY2

CY1

TB2

INDOOR UNIT

S2 S3

NAME SYMBOL NAME SYMBOL NAME

T15AL250V>

TH7TH6 TH3 TH4

tt t t

CNF1

BRN

ORN

(WHT)

CNF2

(WHT)

CNDC (PNK)

WHT

FUSE1

WHT

YLW

TRANS

CNAC (WHT)

REDRED

FUSE2

412121 TH7/6 (RED)

TH3

(WHT)

RED

TH4

(WHT)

CN2

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 SW8 SW9

63H

(YLW)

P. B .

CN2

(WHT)

1 2

CN4

(WHT)

1 2

CN5

(RED)

X52A

BLK

TB-P1

DCL

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> Switch<Function Setup> Switch

LED1

LED2

21S4

TB-P2

RED

L1/L2/L3/NI-Power supply> L1/L2/L3-Power supply>

LEV-A

CNVMNT

LEV-A

(WHT)

CNM

(WHT)

CN4

(WHT)

X52

21S4

(GRN)

TB-C1 TB-N1

WHT

CB1 CB2

CNMNT

(WHT)

141

1313

SC-W SC-V SC-U

TB-L3 TB-L2 TB-L1

BLK

SW5SW8SW4

SWP

X51

(WHT)

+1+1

SW6SW1

CN31

BLK WHT RED

SWP CN31 LED1,LED2 F3,F4 SS CNM CNMNT

CNVMNT

CNDM CN3S

CN51 X51,X52

SW7

SW9

131315

CN3S

(WHT)

CNDM

CN51

(WHT)

BLK

WHT

RED

+1 MODEL SELECT

MODEL

+2 SW5 -1 to 5 : Function Switch

MC MS

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

When M-NET adapter is connected

SW1

CN5

(WHT)

LED2 LED3 LED4

M-NET SUBSTRATE

2 1

CN2M

(WHT)

LED1

LED5

ABS

TB7

M-NET

SW6

200Y

OFF

12345678

250Y

OFF

12345678

SW11

SW12

CND

ON OFF

SW5-6 +2

123456

POWER SUPPLY 3N~ 400V 50Hz

BREAKER

TB1

N. F.

CNAC1

(WHT)

LI 1

RED

L1 L2 L3

WHT

BLK

BLU

GRN/YLW

LI 2

LI 3

GD2GD1

BLK

CNDC

(PNK)

BLK

CNCT (RED)

WHT

CNAC2

(RED)

3112

LO 1

RED

LO 2

WHT

LO3

BLK

M-NET ADAPTER

SYMBOL

TB7

Terminal Block(M-NET connection)

CN5

Connector<Transmission>

CND

Connector<Power Supply>

CNL

(BLU)

ACL4

WHT

Connector<M-NET communication>

CN2M SW1

Switch<Status of communication>

SW11

Switch<Address setting:1st digit>

SW12

Switch<Address setting:2nd digit>

LED1

LED<Power Supply:DC5V>

LED2

LED<Connection to Outdoor Unit>

LED3

LED<Transmission:Sending>

LED4

LED<Transmission:Receiving>

LED5

LED<Power Supply:DC12V>

NAME

9 WIRING SPECIFICATIONS

9-1. FIELD ELECTRICAL WIRING (power wiring specifications)

P200, P250

Outdoor unit model P200, 250 Outdoor unit Power supply Outdoor unit input capacity *1 Main switch (Breaker)

Wiring

Wire No. %

size(mm²)

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 % 0.3 (Non-polar) Outdoor unit L1-N, L2-N, L3-N AC 230 V

Circuit rating

Indoor unit-Outdoor unit S1-S2 *4 AC 230 V Indoor unit-Outdoor unit S2-S3 *4 DC 24 V Remote controller-Indoor unit *4 DC 12 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.

Caution: Be sure to install N-line. Without N-line, it could damage the unit.

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 fexible 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

400V 3 phase

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

400 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

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 L



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

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

Indoor unit

L1 L2 L3

S1 S2 S3

Outdoor unit No.1



Remote controller

supply

Unit power



Unit



power supply

 Earth leakage breaker  wiring circuit breaker or

isolating switch

Unit power



supply

L1 L2



Indoor/outdoor unit connection cable

S1 S2 S3

Outdoor unit No.2

L L2



Indoor/outdoor unit connection cable

S1 S2 S3

Indoor unit

L1 L2 L3

S1 S2 S3

TB4-1

TB4-2

S1 S2 S3

1 2

Unit power



supply

 Earth leakage breaker  wiring circuit breaker or

isolating switch

Outdoor unit

L L2



Indoor/outdoor unit connection

cable S1 S2 S3

9-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

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

Simultaneous twin/triple/four system

The optional indoor power supply terminal kit is required.



   

S1 S2 S3





S1 S2







1 2





L N

S1 S2 S3

1 2

S1 S2 S3

1 2

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



Indoor unit earth



* 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 Required

Required

1 2 (SW8)

Electric heater (For models with heater)

S1 S2 S3

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

ORANGE

CND

Indoor unit

control board

Electric heater (For models with heater)

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 *4 Indoor unit-Outdoor unit S2-S3 *4

rating

Circuit

Remote controller-Indoor unit *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

*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.

S1 S2 S3

Separate indoor unit/outdoor unit power supplies

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.





Remote controller

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

YELLOW

BLUE

YELLOW

BLUE

CND

Unit power supply

Connectors

ORANGE CND

Indoor unit

control board

9-3. 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 earth or a poor electrical contact at the intermediate connection point.

9-4. 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 1.25mm² shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

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.

Group 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) Earth 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.

M-NET transmission wire

Power supply unit for transmission wire

A-control remote controller

Bad example (Multi spot earthing of shield wire)

Central remote controller

Power supply appliance

Refrigerant address 00

M-NET address 01

M-NET type outdoor unit

A-control remote controller

Refrigerant address 00

M-NET address 02

M-NET type outdoor unit

Refrigerant address 00

M-NET address 03

A-control remote controller

Good example 1 (Single spot earthing of shield wire)

Central remote controller

M-NET transmission wire

Good example 2 (Single spot earthing of shield wire)

Central remote controller

M-NET transmission wire

If there are more than 2 earthing spots on the shield wire, noise may enter into the shield wire because the earth wire and

shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among earthing spots.

In case of single spot earthing, noise does not enter into the shield wire because the earth wire and shield wire do not form

1 circuit.

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

installation manual.

Power supply appliance

M-NET type outdoor unit

 M-NET wiring

(1) Use 2-core x 1.25mm² 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

M-NET terminal block

Earth wire

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

M1 M2 S

Transmission

wire

Shield part

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 earth wire on the plate as shown on the right figure.

9-4-1. 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 (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”.)

M-NET Address No.

SW11

Switng setting

ones digit

SW12 tens digit

9-4-2. 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

9-4-3. 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

w 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

w 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”.

10 REFRIGERANT SYSTEM DIAGRAM

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

Refrigerant flow in cooling Refrigerant flow in heating

Refrigerant GAS pipe :25.4(:1 inch)

Refrigerant LIQUID pipe P200 : :9.52(:3/8 inch) P250 : :12.7(:1/2 inch)

Ball valve

Strainer

Accumulator

Stop valve (with service port)

Service port

(check)

(#50)

Strainer (#40)

4-way valve

Strainer (#100)

Service port

(check)

High pressure protect switch

Muffler

Thermistor (TH4)

Compressor

Linear expansion valve

Strainer (#100)

Outdoor heat exchanger

Thermistor (TH7)

Thermistor (TH6)

Thermistor (TH3)

Distributor

1. Refrigerant recovering (pump down)

Perform the following procedures to recover refrigerant when moving the indoor unit or the outdoor unit. 1Turn on the power supply (circuit breaker). wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally. 2After 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 fan (indoor and outdoor units) start operating and refrigerant recovering operation begins. LED1 and LED2 on the control board of the outdoor unit are lit. wSet the SWP switch (push-button type) to ON in order to perform refrigerant 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 for 3 minutes until compressor stops and set the SWP switch to ON again. 3Because 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. wIn case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then repeat step 2 3 minutes later. wIf 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. 4Turn off the power supply (circuit breaker).

2. Start and finish of test run

• Operation from the indoor unit

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

• Operation from the outdoor unit

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

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

• There may be a faint knocking sound around the machine room after power is supplied, but this is

no problem with product because the linear expansion 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 not a problem with product because the check valve itself generates the sound due to small pressure difference 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.)

 Stop  Operation  Cooling  Heating

<SW4>



ON OFF



11 TROUBLESHOOTING

11-1. TROUBLESHOOTING

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the 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 “11-4. Self-diagnosis action table”.

Conduct troubleshooting and ascertain the cause of the trouble according to “11-5. 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 “11-5. Troubleshooting

by inferior

11-2. 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.

wDo not 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 “Selection of Functions through Remote Controller”.

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

"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 and triple operation. Malfunctions may not be displayed regardless of incorrect wiring. w1 After turning on the power supply, the system will go into startup mode, “PLEASE WAIT” will blink on the display section of the room temperature, and lamp (green) of the remote controller will flash. 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 w1 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.

cannot be operated.

OUTDOOR BOARD LED Display

< > indicates digital display.

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

green(once) and red(once) blink alternately. <F1>

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

alternately. <F3, 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 short.

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

• Remote controller transmission wire open.

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

system startup. (Normal)

Cause

1, L2, L3 and

w Press the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD display.

LCD

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

Contents of trouble

LCD

Malfunction outdoor unit

U1~UP

F3~F9

Malfunction

E0~E5

Remote controller transmitting error

E6~EF

Indoor/outdoor unit communication error

----

No error history

FFFF

No applied unit 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

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

Flashes when indoor and outdoor unit are communicating.



,



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".

1 Turn on the main power to the unit. 2 Press the button twice continuously.

(Start this operation from the status of remote controller display

turned off.)

TEST RUN

A and current operation mode are displayed. 3 Press the ( ) button to activate mode, then

check whether cool air is blown out from the unit.

4 Press the ( ) button to activate mode, then

check whether warm air is blown out from the unit.

5 Press the button and check whether strong air is blown out

from the unit.

6 Press the button and check whether the auto vane operates

properly.

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

Note:

• Point the remote controller towards the indoor unit receiver while following steps 2 to 7.

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

TEST RUN

MODE

FAN

VANE

COOL

HEAT

11-3. HOW TO PROCEED "SELF-DIAGNOSIS"















11-3-1. 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.

 T o 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.

11-3-2. 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 shut 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] or [00]

and

[15].

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



Display self-diagnosis results.

Error code (2 or 4 digits)



Reset the error history.

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

(Alternating Display)

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



 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.

11-3-3. 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.

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.

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.

CHECK

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

11-3-4. 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.

• 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.

Off

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

1st2

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

· · · Repeated

[Output pattern B]

Beeper sounds OPERATION

INDICATOR lamp blink pattern

Beep Beep 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”)

0.5 sec.

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

1st2

· · · Repeated

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

Wired remote controller

Symptom Remark

(Number of times)

1P1 2

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

3E6,E7

Intake sensor error

Indoor/outdoor unit communication error

4 P4 Drain sensor error/Float switch connector open 5 6

P5 PA P6 EE

8P8

Drain pump error Forced compressor stop (due to water leakage abnormality) Freezing/Overheating protection operation Communication error between indoor and outdoor units Pipe temperature error

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

9 E4, E5 Remote controller signal receiving error 10 11 12

–

[Output pattern B]

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

Wireless remote controller

– –

Fb E0, E3

E1, E2

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

– –

Indoor unit control system error (memory error, etc.) Remote controller transmission error

Remote controller control board error

Symptom Remark

(Number of times)

9 10

12 13 14

E9 UP

U3,U4 UF

U2 U1,Ud U5

U8 U6 U7

U9,UH

– –

Others

*1If 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.

*2If 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.

11-4. SELF-DIAGNOSIS ACTION TABLE

Error Code

Abnormal point and detection method

1 No voltage is supplied to terminal

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

b) Contact failure or disconnec-

terminal c) Open phase (L2 or N phase)

(Note 1) Refer to indoor unit section for code P and code E. (P.32, 33)

Case

1 Check following items.

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

turned off.

tion of power supply

Judgment and action

block (TB1)

None

(5201)

—

63H connector open

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

2 Electric power is not supplied to

outdoor controller circuit board. a) Disconnection of connector

(CNDC)

3 Disconnection of reactor

(ACL4)

4 Disconnection of outdoor noise

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

5 Defective outdoor controller circuit board

1 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63H

3 63H is working due to defective

parts.

4 Defective outdoor controller circuit board

2 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 11-9.

3 Check connection of reactor. (ACL4)

4 a) Check connection of outdoor noise filter

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

Refer to 11-9.

5 Replace controller board (When items above

are checked but the units cannot be repaired).

1 Check connection of 63H connector on outdoor controller circuit board. Refer to 11-9.

2 Check the 63H side of connecting wire.

3 Check continuity by tester.

Replace the parts if the parts are defective. 4 Replace outdoor controller circuit board.

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

1 Contact failure or miswiring of

indoor/outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

3 Excessive number of indoor

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

4 Defective transmitting receiving

circuit of outdoor controller

circuit board 5 Defective transmitting receiving

circuit of indoor controller board

6 Defective indoor power board 7 2 or more outdoor units have

refrigerant address “0” .

(In case of group control) 8 Noise has entered into power supply or indoor / outdoor unit connecting wire.

1 Contact failure or miswiring of

indoor/outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

4 Defective transmitting receiving

circuit of outdoor controller circuit board

5 Defective transmitting receiving

circuit of indoor controller board

6 Defective indoor power board 7 2 or more outdoor units have

refrigerant address “0”.

(In case of group control) 8 Noise has entered into power

supply or indoor/outdoor unit connecting wire.

Judgment and action

1 Check disconnection or looseness or polar-

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

2 Check diameter and length of indoor/outdoor

unit connecting wire. Total wiring length: 80m (Including wiring connecting each indoor unit

and between indoor and outdoor unit) Also check if the connection order of flat

cable is S1, S2, S3.

3 Check the number of indoor units that are

connected to one outdoor unit. (If EA is

detected.)

4~6 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.

7 Check if refrigerant addresses (SW1-3 to

SW1-6 on outdoor controller circuit board)

are overlapping in case of group control system.

8 Check transmission path, and remove the

cause.

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

and EC.

(6846)

Start-up time over

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

1 Contact failure of indoor/ outdoor unit connecting wire 2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

7 2 or more outdoor units have

refrigerant address “0” .

(In case of group control) 8 Noise has entered into power

supply or indoor/outdoor unit connecting wire.

Error Code

(1302)

Abnormal point and detection method

High pressure (High-pressure switch 63H worked)

Abnormal if high-pressure switch 63H worked ( w ) during compressor operation. w 4.15 MPa

63H: High-pressure switch

Case

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

dirt of indoor fan

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

valve (Not full open)

8 Clogged or broken pipe 9 Locked outdoor fan motor

0 Malfunction of outdoor fan

motor

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

defective inspection of outside temperature thermistor

(It detects lower temperature

than actual temperature.)

4 Disconnection or contact failure

of connector (63H) on outdoor controller board

5 Disconnection or contact failure

of 63H connection

6 Defective outdoor controller

board

7 Defective action of linear

expansion valve

8 Malfunction of fan driving circuit

Judgment and action

1~6 Check indoor unit and repair defect.

7 Check if stop valve is fully open.

8 Check piping and repair defect. 9~2 Check outdoor unit and repair defect.

3 Check the inspected temperature of outside

temperature thermistor on LED display.

(SW2 on A-Control Service Tool : Refer to

11-10.)

4~6 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.

7 Check linear expansion valve. Refer to 11-6. 8 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.)

1 Overheated compressor opera-

tion caused by shortage of refrigerant

2 Defective operation of stop

valve

3 Defective thermistor 4 Defective outdoor controller

board

5 Defective action of linear

expansion valve

6 Clogging with foreign objects in

refrigerant circuit

w Clogging occurs in the parts

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

1 Disconnection or contact failure of connector (TH4) on

the outdoor controller circuit board

2 Defective thermistor

3 Defective outdoor controller

circuit board

1 Check intake superheat. Check leakage of refrigerant. Charge additional refrigerant.

2 Check if stop valve is fully open.

34 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.

5 Check linear expansion valve. Refer to 11-6. 6 After recovering refrigerant, remove water

from entire refrigerant circuit under vacuum more than 1 hour.

1 Check connection of connector (TH4) on the

outdoor controller circuit board. Check breaking of the lead wire for thermistor (TH4). Refer to 11-9. 2 Check resistance value of thermistor (TH4) or

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

11-10.) 3 Replace outdoor controller board.

+ 64 hidden pages

Mitsubishi PUHZ-P200YHA(3), PUHZ-P250YHA(3) Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual