Mitsubishi Electric PUZ-A42NHA5-BS, PUZ-A42NHA5, PUY-A42NHA5, PUY-A42NHA5-BS Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT -TYPE, AIR CONDITIONERS

Outdoor unit

April 2012

No.OCH512

SERVICE MANUAL

[Model names]

PUZ-A42NHA5

PUZ-A42NHA5-BS

PUY-A42NHA5

PUY-A42NHA5-BS

[Service Ref.]

PUZ-A42NHA5 PUZ-A42NHA5-BS

PUY-A42NHA5 PUY-A42NHA5-BS

R410A

Note:

• This manual describes only service data of the outdoor units.

•

RoHS compliant products have <G> mark on the spec name plate.

PUZ-A42NHA5 PUY-A42NHA5

CONTENTS

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

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

3. FEATURES ·····················································6

4. SPECIFICATIONS ·········································· 7

5. DATA ·······························································8

6. OUTLINES AND DIMENSIONS ··················· 11

7. WIRING DIAGRAM ······································ 12

8. WIRING SPECIFICATIONS ··························13

REFRIGERANT SYSTEM DIAGRAM

10. TROUBLESHOOTING ··································20

11. EASY MAINTENANCE FUNCTION·············· 72

12. FUNCTION SETTING ···································75 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

13.

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

PARTS CATALOG (OCB512)

·············18

·····83

OCH512

REFERENCE MANUAL

INDOOR UNIT

Model name Service Ref. Service manual No. PLA-A42BA4 PLA-A42BA4 OCH482

OCB482

PCA-A42KA5 PCA-A42KA5.TH OCH501

OCB501

PEAD-A42AA4 PEAD-A42AA4

HWE0905A

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

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

Preparation before the repair service.

• Prepare the proper tools.

• Prepare the proper protectors.

• Provide adequate ventilation.

• After stopping the operation of the air conditioner, turn off the power-supply beaker.

• Discharge the condenser before the work involving the electric parts.

Precautions during the repair service.

• Do not perform the work involving the electric parts with wet hands.

• Do not pour water into the electric parts.

• Do not touch the refrigerant.

• Do not touch the hot or cold areas in the refrigerating cycle.

• When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to touch the live parts.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

OCH512

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 contaminants such as sulfur, oxides, dirt, shaving particles, etc, which are hazard to refrigerant cycle. 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.

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.

Do not use a charging cylinder.

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

The refrigerant oil applied to flare and flange connections must be ester oil, ether oil or alkylbenzene oil in a small amount.

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 refrigerant other than R410A.

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

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

Use the specified refrigerant only.

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

[1] Cautions for service

OCH512

(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

—

2-3. CAUTIONS FOR REFRIGERANT PIPING WORK

OCH512

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 times higher than that of R22, their sizes of flared sections and flare nuts are different.

1 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 0.7 mm [7/256 inch] 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 [1/32]

1.0 [5/128] —

2 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 is higher than that of other refrigerants. Therefore, to enhance air tightness and intensity, flare cutting dimension of copper pipe for R410A has been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has 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.

: mm [inch]

0.8 [1/32]

1.0 [5/128]

Dimension A

Dimension B

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 [11/32-23/64]

13.2 [1/2-33/64]

16.6 [41/64-21/32]

19.7 [49/64-25/32] —

Unit : mm [inch]

( )

-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

3 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

Collection of refrigerant Refrigerant charge

Apply to flared section Prevent compressor malfunction

when charging refrigerant by spraying liquid refrigerant

Prevent gas from blowing out when detaching charge hose

Vacuum drying and air purge

Flaring work of piping

Bend the pipes Cut the pipes Weld the pipes 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 Tools can be used for other refrigerants Tools can be used for other refrigerants Tools can be used for other refrigerants Tools can be used for other refrigerants Tools can be used for other refrigerants

Tool exclusive for R410A

(Usable if equipped with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Unit : mm [inch]

Dimension B

R410A R22

17.0 [43/64]

22.0 [7/8]

26.0 [1-3/64]

29.0 [1-9/64] —

17.0

22.0

24.0

27.0

36.0

3 FEATURES

OCH512

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max. 100ft, 30m)

The refrigerant circuit with LEV (Linear Expansion Valve) and accumulator always control the optimal refrigerant level regardless of the length (100ft, 30m max. and 16ft, 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.

4 SPECIFICATIONS

OCH512

Service Ref. PUZ-A42NHA5 Power supply Phase

MCA A MOCP A Breaker size A External finish Heat exchanger Defrost method Crankcase heater Compressor

Fan Fan(drive)% No.

Sound level Cooling dB 51 Protection devices

Dimension W mm

Weight kg 114 Refrigerant

Refrigerant Pipe size OD mm 9.52 piping Liquid in. 3/8

Cycle Voltage

Model Motor output kW R.L.A. L.R.A. Starter type

Fan motor output Fan motor

Airflow m

Heating dB

Dmm Hmm W in. D in. 13 + 1-3/16 H in. 53-5/32

Charged kg 4.5 Control Linear expansion valve

Oil Model Charged L 1.4

Pipe size OD mm 15.88 Gas in. 5/8 Connection method Indoor Flared Connection method Outdoor Flared Height difference m Max. 30 IU - OU ft Max. 100 Piping length m Max. 50

F.L.A.

/min

CFM

lbs 251

lbs 10

oz 45

ft Max. 165

PUZ-A42NHA5-BS

Single

60Hz

208/230V

26 40 30

Munsell 3Y 7.8/1.1

Plate fin coil

Reverse cycle

Hermetic

ANB33FCTMT

2.5 20

27.5

Inverter

Propeller fan % 2

0.086 + 0.086

0.40 + 0.40 100

3530

HP switch

Comp. shell thermo

950

330+30

1350

37-12/32

R410A

Ether(FV50S

PUY-A42NHA5

PUY-A42NHA5-BS

–

112 247

)

OCH512

DATA

5-1. REFILLING REFRIGERANT CHARGE (R410A : oz, kg)

Service Ref. 50ft 60ft 70ft 80ft 90ft 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

15m 18m 21m 24m 27m 30m 33m 37m 40m 43m 46m 49m 50m

132 oz 136 oz 142 oz 148 oz 154 oz 160 oz 166 oz 172 oz 178 oz 184 oz 190 oz 196 oz 202 oz 160 oz

3.7 kg 3.9 kg 4.0 kg 4.2 kg 4.4 kg 4.5 kg 4.7 kg 4.9 kg 5.0 kg 5.2 kg 5.4 kg 5.6 kg 5.7 kg 4.5 kg

Piping Length (one way

)

Longer pipe than 70 or 100 ft,additional charge is required.

5-2. COMPRESSOR TECHNICAL DATA

PUZ-A42NHA5

Service Ref.

Compressor model ANB33FCTMT

Winding Registance

()

U-V 0.302 U-W 0.302 W-V 0.302

PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

(

at 20°C,68°F

)

Factory

Charged

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

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

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

MODE

COOLING

HEATING

SPL(dB)

51 55

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MICROPHONE

3.3ft UNIT

5ft

GROUND

5-3. STANDARD OPERATION DATA

OCH512

5-3-1. Heat pump

Representative matching Mode Total Capacity BTU/h

Input W Indoor unit model

Phase Cycle Voltage Current Outdoor unit model

Electrical circuit

Phase Cycle Voltage Current Discharge pressure MPa Suction pressure MPa Discharge temperature  Condensing temperature  Suction temperature  Ref. Pipe length m Discharge pressure PSIG Suction pressure PSIG

Refrigerant circuit

Discharge temperature °F Condensing temperature °F Suction temperature °F Ref. Pipe length ft 25 25 Intake air temperature DB  26.7 21.1

Indoor

Intake air temperature WB  19.4 15.6

side

Discharge air temperature DB  12.9 41.9 Intake air temperature DB  35 8.3

Outdoor side

Intake air temperature WB  23.9 6.1 Intake air temperature DB °F 80 70

Indoor

Intake air temperature WB °F 67 60

side

Discharge air temperature DB °F 55 107 Intake air temperature DB °F 95 47

Outdoor side

Intake air temperature WB °F 75 43 SHF 0.71 BF

COOLING HEATING

42,000 45,000

4,600 4,450

1.00A 0.94A

20.4A

2.83

0.82

73.4

47.5

4.9

7.6 410 120 164 118

PLA-A42BA4

Single

60Hz 230V

PUZ-A42NHA5

Single

60Hz 230V

21.5A

2.93

0.69

80.3

47.5

0.3

7.6 425 100 177 118

– –0.15

5-3-2. Cooling only

OCH512

Representative matching Mode Total Capacity BTU/h

Input W Indoor unit model

Phase Cycle Voltage Current Outdoor unit model

Electrical circuit

Phase Cycle

Voltage Current Discharge pressure MPa Suction pressure MPa Discharge temperature  Condensing temperature  Suction temperature  Ref. Pipe length m Discharge pressure PSIG Suction pressure PSIG

Refrigerant circuit

Discharge temperature °F Condensing temperature °F Suction temperature °F Ref. Pipe length ft 25

Indoor side

Outdoor side

Indoor side

Outdoor side

SHF 0.71 BF 0.15

Intake air temperature DB  26.7 Intake air temperature WB  19.4 Discharge air temperature DB  Intake air temperature DB  35 Intake air temperature WB  23.9 Intake air temperature DB °F 80 Intake air temperature WB °F 67 Discharge air temperature DB °F Intake air temperature DB °F 95 Intake air temperature WB °F 75

PLA-A42BA4

COOLING

42,000

4,600

PLA-A42BA4

Single

60Hz 230V

1.00A

PUY-A42NHA5

Single

60Hz 230V

20.4A

2.83

0.82

73.4

47.5

4.9

7.6 410 120 164 118

12.9

OCH512

OUTLINES AND DIMENSIONS

PUZ-A42NHA5 PUZ-A42NHA5-BS Unit: mm<inch> PUY-A42NHA5 PUY-A42NHA5-BS

417<16-13/32>

19<3/4>

2-U Shaped notched hole

(Foundation Bolt M10<W3/8>)

175<6-7/8>

600<23-5/8>

Rear Air Intake

175<6-7/8>

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<W3/8>)

bolts. (Bolts and washers must

3 FOUNDATION BOLTS

be purchased locally.)

<5-29/32> 150mm Min.

Dimensions of space needed

for service access are

shown in the below diagram.

370<14-9/16>

56<2-7/32>

45<1-25/32>

330<13>30<1-3/16>

Side Air Intake

FOUNDATION

<1-3/16> 30mm Min.

<19-11/16> 500mm Min.

2 SERVICE SPACE

Min.

10mm<3/8>

42<1-21/32>

66<2-5/8>

Air Discharge

Min.

500mm

<19-11/16>

Service space

28<1-3/32>

53<2-3/32>

2-12%36 Oval hole

(Foundation Bolt M10<W3/8>)

Left···Power supply wiring

Terminal Block

950<37-13/32>

Earth terminal

322<12-11/16>

Handle

Side Air Intake

Rear Air Intake

Handle

Right····Indoor/Outdoor wiring

Service panel

Handle

1076<42-3/8>

635<25>

1350<53-5/32>

Air intake

* 1 447<17-19/32>

Front piping cover

* 1 443<17-7/16>

23<29/32>

371<14-19/32>

When installing the conduit.

Rear piping cover

Set the attachment to the

inner side of each panel.

Conduit hole

(2-:27<1-1/16>Knockout)

Bottom piping hole

71<2-13/16>

1/2 Conduit attachment

2-:22.2<7/8>

Conduit hole

(2-:27<1-1/16>Knockout)

Rear trunking hole

40<1-9/16>

45<1-25/32>

Right trunking hole

(Knockout)

40<1-9/16>

<2-31/32>

Right piping hole

(Knockout)

45<1-25/32>

(Knockout)

219<8-5/8>

(Knockout)

55<2-3/16> 63<2-1/2>

63<2-1/2>

92<3-5/8>

73<2-7/8>

<2-1/2>

55<2-3/16>

40<1-9/16>

74<2-19/32>

:92

<3-5/8>

73<2-7/8>

:92

<3-5/8>

27<1-1/16>

Drain hole

5-:33<1-5/16>

145

<5-23/32>

145

<5-23/32>

145

<5-23/32>

220

<8-21/32>

81<3-3/16>

30<1-3/16>

31<1-7/32>

Rear piping hole

(Knockout)

92<3-5/8>

65<2-9/16>

27<1-1/16>

23<29/32>

92<3-5/8>

55<2-3/16>

19<3/4>

73<2-7/8> 23<29/32>

23<29/32>

27<1-1/16>

Min. 10mm

<3/8>

FREE

The diagram below shows a

basic example.

Explanation of particular details are

1 FREE SPACE (Around the unit)

given in the installation manuals etc.

<3/8>

Min. 10mm

Min. 150mm

<5-29/32>

<39-3/8>

Min. 1000mm

····Refrigerant GAS pipe connection (FLARE):15.88<5/8>

····Refrigerant LIQUID pipe connection (FLARE): 9.52<3/8>

Example of Notes





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

:92

(Knockout)

<3-5/8>

65<2-9/16>

92<3-5/8>

Front piping hole

(Knockout)

40<1-9/16>

Conduit hole

(2-:27<1-1/16>Knockout)

Piping Knockout Hole Details

Front trunking hole

OCH512

WIRING DIAGRAM

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

[LEGEND]

SYMBOL TB1 MC MF1,MF2 21S4 63H TH3 TH6 TH7 TH8

Terminal Block<Power Supply, Indoor/Outdoor > Motor for Compressor Fan Motor Solenoid Valve (Four-Way Valve) High Pressure Switch

Thermistor<Outdoor Pipe>

Thermistor<Outdoor 2-Phase Pipe> Thermistor<Outdoor>

Thermistor<Heatsink> TH32 Thermistor<Shell> LEV-A DCL

Electronic Expansion Valve

Reactor

CY1, CY2 Capacitor ACTM CB P.B.

TABU/V/W

Active Filter Module

Main Smoothing Capacitor

Power Circuit Board

Connection T erminal<U/V/W -Phase>

MF1

MS 3~

MF2

MS 3~

NAME SYMBOL NAME SYMBOL NAME

(WHT)

CNS

C. B.

CNF1 (WHT)

CNF2 (WHT)

CNDC (PNK)

TABS/T TABP1/P2/P TABN1/N2/N DS2, DS3 IPM

N.F.

LI/LO NI/NO EI, E2 52C

C.B.

F1~F4 SW1

SW4 SW5 SW6

TH7TH6 TH3TH32

t° t° t°t°

412121

TH7/6

TH3

TH32

(RED)

(WHT)

(BLK)

CN2

(WHT)

TRANS

CNAC (WHT)

21 43

Connection T erminal<L1/L2-Phase> Connection T erminal<DC Voltage> Connection T erminal<DC Voltage> Diode Bridge Power Module Noise Filter Circuit Board Connection Lead<L1-Phase> Connection Lead<L2-Phase> Connection T erminal<Ground> 52C Relay Controller Circuit Board Fuse<T6.3AL250V> Switch<

Forced Defrost, Defect History Record Reset, Refrigerant Address> Switch<Test Operation> Switch<Function Switch>

Switch<Model Select>

63H

LEV-A

63H

(YLW)

+2 PUZ only

LEV-A (WHT)

LED2

CN4

(WHT)

X52

13 13

21S4

(GRN)

21S4

LED1

CNVMNT

CNMNT

(WHT)

CNM

(WHT)

CN52C

(RED)

221

X51

(WHT)

SW5SW8SW4SWP

+1+1

SW6SW1

CN31

CN3S

(WHT)

CNDM

CN51

(WHT)

SW7 SW8 SW9 SWP CN31 LED1,LED2 SS CNM CNMNT CNVMNT CNDM CN3S CN51 X51,X52

When M-NET adapter is connected

SW7

SW9

ABS

3151

Switch<Function Setup> Switch<Function Setup> Switch Switch<Pump Down> Connector<Emergency Operation> LED<Operation Inspection Indicators> 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< Connected for Option> Connector< Connected for Option (Signal output)> Relay

SW11

SW1

CN5

(WHT)

LED2

SW12

LED3 LED4

M-NET ADAPTER

CND

CN2M

(WHT)

LED1

LED5

TB7

M-NET

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

N. F.

BLU

WHT

1 2

CN52C

1 2

CN5

(BLK)

(RED)

OFF

123456

SW5-5.6

OFF

7878123456

OFF

123456

52C

P. B.

CNAF

(WHT) 6

IPM

CN2

(WHT)

RED

TABP2

TH8

CN3

(WHT)

t°

CN5

(RED)

CN4

(WHT)

WHT

TABN

TABP

RED

TABV

TABU

WHT

RED

UVW

M 3~

BLK

CNDC

(PNK)

1 3

TABN1

TABW

BLK

DCL

BLK

ACTM

DS3

DS2

BLK

WHT

N1 N2

TABT

BLU

YLW

GRN

S1 S2 S3

INDOOR UNIT

3 1

CNAC2

CNAC1

ORN

(RED)

(WHT)

LI NI

CY1 CY2

BRN

TB1

+1. MODEL SELECT

The black square (■) indicates a switch position.

MODEL SW6

PUZ-A42NHA5

TABS

WHT

TABP1

RED

TABN2

WHT

BLU

RED

REDRED

WHT

L1 L2 GR

POWER SUPPLY 208 / 230V 60Hz

+Use copper supply wires.

PUY-A42NHA5

+2. SW5-1 to 4 : Function switch

OCH512

WIRING SPECIFICATIONS

8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT (A-control application)

The following connection patterns are available. The outdoor unit power supply patterns vary on models.

1:1 System Simultaneous twin system





L1 L2 GR

S1 S2 S3



S1 S2 S3





L1 L2 GR

S1 S2 S3



 



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

 Outdoor unit power supply  Wiring circuit breaker or isolating switch  Outdoor unit  Indoor unit/outdoor unit connecting cords  Remote controller  Indoor unit  Indoor unit earth

Indoor unit model Indoor unit power supply

Minimum circuit ampacity Maximum rating of overcurrent protective device

Outdoor unit model Outdoor unit power supply Breaker size Minimum circuit ampacity Maximum rating of overcurrent protective device

Outdoor unit power supply

Outdoor unit power supply earth Indoor unit-Outdoor unit *2

size

Wiring

Indoor unit earth *2

Wire No.

Remote controller-Indoor unit *3 Outdoor unit L1-L2 *4 Indoor unit-Outdoor unit S1-S2 *4 Indoor unit-Outdoor unit S2-S3 *4

rating

Circuit

Remote controller-Indoor unit *4

*1. Use earth leakage breaker (NV). *2. Max. 45 m, 147 ft If AWG13 used, Max. 50 m, 164 ft. If AWG13 used and S3 separated, Max. 80m, 262ft. *3. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 1500 ft *4. The figures are NOT always 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.

PLA-A42 PCA-A42

–

15A

A42

Single, 208/230V, 60 Hz

30A 26A

40A 2 % Min. AWG 10 1 % Min. AWG 10

3 % AWG 16 (polar)

1 % Min. AWG 16

2 % AWG 22 (Non-polar)

AC 208/230 V AC 208/230 V

DC 24 V DC 12 V

PEAD-A42

–

3.50A 15A

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

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

Notes:

2.Use copper supply wires.

3.Use wires rated 600V or more for the power supply cables and the indoor/outdoor unit connecting cables.

4.Install an earth longer than other cables.

230V

Single phase

A-Control

Outdoor Unit

In case of A-control wiring, there is high v oltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between po wer line and communication signal line.Therefore, please turn off the main power supply when servicing. And do not touc h 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.

Isolator

3 poles isolator

A-Control

Indoor Unit

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

OCH512

The following connection patterns are available. The outdoor unit power supply patterns vary on models.

1:1 System

* The optional indoor power supply terminal kit is required.





L1 L2 GR GR

S1 S2 S3





L1 L2



GR S1

S2 S3

1 2



L1 L2



S1 S2 S3







GR S1

S2 S3



L1 L2



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

Simultaneous twin system

L1 L2





GR S1

S2 S3



Outdoor unit power supply



Wiring circuit breaker or isolating switch



Outdoor unit



Indoor unit/outdoor unit connecting cords



Remote controller



Indoor unit



Indoor unit power supply



Option





Outdoor unit power supply



Wiring circuit breaker or isolating switch



Outdoor unit



Indoor unit/outdoor unit connecting cords



Remote controller



Indoor unit



Indoor unit power supply Option



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. Change the indoor unit electrical box wiring refering to the figure in the right and the DIP switch settings of the outdoor unit control board.

Indoor unit specifications Indoor unit electrical boxconnectorconnection 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)

Required

ON OFF 1 2

(SW8)

* There are three 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

Minimum circuit ampacity Maximum rating of overcurrent protective device

Indoor unit power supply

size

Indoor unit power supply earth

Indoor unit-Outdoor unit

Wiring

Indoor unit earth

Wire No.

Remote controller-Indoor unit Indoor unit L1-L2 Indoor unit-Outdoor unit S1-S2 Indoor unit-Outdoor unit S2-S3

rating

Circuit

Remote controller-Indoor unit

*1. Max. 120 m, 393 ft *2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 500 m, 1500 ft *3. The figures are NOT always against the ground.

*2 *3 *3 *3 *3

PLA-A42 PCA-A42

Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz

15A 2 % Min. AWG 16 1 % Min. AWG 16

2 % AWG 22 (polar) 3 % 1.5 (polar)

2 % AWG 22 (Non-polar) 2 % 0.3 (Non-polar)

–

AC 208/230 V AC 208/230 V

– DC 24 V DC 12 V

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

2. Use copper supply wires.

3. Use wires rated 300V or more for the power supply cables.

4. Install an earth longer than other cables.

L1 L2

S1 S2 S3

Indoor unit power supplied from outdoor unit (Initial setting)

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

BLUE

YELLOW

CN101

Indoor unit

control board

PEAD-A42

3.50A 15A

1 % Min. 1.5

DC 24 V DC 12 V

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

L1 L2

S1 S2 S3

Separate indoor unit/outdoor unit power supplies

– –

–

Connectors

CN101

Indoor unit

control board

8-3. INDOOR - OUTDOOR CONNECTING CABLE

OCH512

Outdoor power supply

Max. 45m, 147ft

Max. 50m, 164ft

Wire No. % Size

Max. 80m, 262ft

Indoor unit-Outdoor unit

+ The max. cable length may vary depending on the condition of installation, humidity or materials, etc.

Indoor/Outdoor separate power supply

Indoor unit-Outdoor unit

+ 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.

3 % AWG16(polar)

3 % AWG13(polar)

Wire No. % Size

Max. 120m, 393ft

2 % Min. AWG22

3 % AWG13(polar) and S3 separated

8-4. M-NET WIRING METHOD

OCH512

(Points to note) (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 5 cm. Do not put them in the same

conduit tube. (2) Terminal block (TB7) for transmission wires should never be connected to 208/230V power supply. If it is connected, electronic parts on M-NET P.C. board may burn out. (3) Use 2-core × 1.25mm² [AWG16] 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

Power supply unit for transmission wire

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

M-NET transmission wire

Power supply appliance

Refrigerant address 00

M-NET address 01

M-NET type outdoor unit

A-control remote controller

M-NET type outdoor unit

Refrigerant address 00

M-NET address 02

M-NET type outdoor unit

A-control remote controller

Refrigerant address 00

M-NET address 03

Good example 1 (Single spot grounding of shield wire)

Central remote controller

M-NET transmission wire

Good example 2 (Single spot grounding of shield wire)

Central remote controller

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 one circuit and the electric potential difference occurs due to the impedance difference among ground-

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

installation manual.

Power supply appliance

M-NET type outdoor unit

● M-NET wiring

OCH512

(1) Use 2-core × 1.25mm² [AWG16] 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 A terminal and the other to B. 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 (A, B, S) on M-NET terminal block should be individually wired to the other

M-NET terminal block

ABS

Transmission

wire

Ground wire

Shield part

outdoor unit’s terminal, i.e. A to A, B to B 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 series, 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”.)

8-4-2. Refrigerant address setting

M-NET Address No.

SW11

Switching

setting

ones digit

SW12 tens digit

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

ON OFF

OFF

ON 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 address 00

M-NET address 02

A-control remote controller

Refrigerant address 01

M-NET address 03

TB5

Refrigerant address 00

M-NET address 04

A-control remote controller

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

System controller

Power supply unit for transmission wire

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

“03” 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”.

Group A Group B

Refrigerant address 00

M-NET address 01

Refrigerant address 01

M-NET address 02

Refrigerant address 00

M-NET address 04

TB5

A-control remote controller

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

OCH512

REFRIGERANT SYSTEM DIAGRAM

PUZ-A42NHA5 Unit: mm (inch) PUZ-A42NHA5-BS

Refrigerant GAS pipe

15.88 (W5/8)

Ball valve

Service port (check)

4-way valve

(#50)

Strainer

Service port (check)

High pressure protect switch

Outdoor heat exchanger

Muffler

Thermistor (TH6)

Thermistor (TH3)

Refrigerant LIQUID pipe

9.52 (W3/8)

Strainer

(#100)

Accumulator

Compressor

Strainer

(#100)

Stop valve (with service port)

Thermistor (TH32)

Strainer

(#100)

Linear expansion valve

Refrigerant flow in cooling Refrigerant flow in heating

Distributor

PUY-A42NHA5 Unit: mm (inch) PUY-A42NHA5-BS

Refrigerant GAS pipe

15.88 (W5/8)

Ball valve

Strainer

Service port (check)

(#50)

Strainer

(#100)

Service port (check)

High pressure protect switch

Outdoor heat exchanger

Thermistor (TH6)

Thermistor (TH3)

Accumulator

Refrigerant LIQUID pipe

9.52 (W3/8)

Stop valve (with service port)

Compressor

Strainer

(#100)

Thermistor (TH32)

Strainer

(#100)

Linear expansion valve

Distributor

Refrigerant flow in cooling

1. Refrigerant collecting (pump down)

OCH512

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1 Supply power (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 collecting (pump down) cannot be completed normally.

* Start-up of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned on. Start the pump-down

operation 3 to 4 minutes after the power (circuit breaker) is turned ON.

2 After the liquid stop valve is closed, set SW1-1 on the control board of the outdoor unit to ON. The compressor (outdoor unit) and ventilators

(indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1 and LED2 on the control board of the outdoor unit are lit.

* Only set SW1-1 to ON if the unit is stopped. However, even if the unit is stopped and SW1-1 is set to ON less than three minutes after

the compressor stops, the refrigerant collecting operation cannot be performed. Wait until compressor has been stopped for three minutes and then set SW1-1 to ON again.

3 Because the unit automatically stops in about two to three minutes when the refrigerant collecting operation is completed (LED1 off, LED2

lit), be sure to quickly close the gas stop valve. If LED1 is lit and LED2 is off and the outdoor unit is stopped, refrigerant collection is not properly performed. Open the liquid stop valve completely, and then repeat step 2 after three minutes have passed.

* If the refrigerant collecting operation has been completed normally (LED1 off, LED2 lit), the unit will remain stopped until the power supply

is turned off.

4 Turn off the power supply (circuit breaker).

* Note that when the extension piping is very long with large refrigerant amount, it may not be possible to perform a pump-down operation.

Warning: When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst if air etc. get into it.

2. Refrigerant pipe airtight testing method

(1) Connect the testing tools.

• Make sure the stop valves A B are closed and do not open them.

• Add pressure to the refrigerant lines through the service port C of the liquid stop valve D. (2) Do not add pressure to the specified pressure all at once; add pressure little by little. 1 Pressurize to 0.5 MPa (5 kgf/cm²G), wait 5 minutes, and make sure the pressure does not decrease. 2 Pressurize to 1.5 MPa (15 kgf/cm 3 Pressurize to 4.15 MPa (41.5 kgf/cm²G) and measure the surrounding temperature and refrigerant pressure. (3) If the specified pressure holds for about one day and does not decrease, the pipes have passed the test and there are no leaks.

• If the surrounding temperature changes by 1°C, the pressure will change by about 0.03 MPa (0.3 kgf/cm²G). Make the necessary corrections.

(4) If the pressure decreases in steps (2) or (3), there is a gas leak. Look for the source of the gas leak.

G), wait 5 minutes, and make sure the pressure does not decrease.

















Stop valve <Liquid side>

  Stop valve <Gas side>  Service port  Open/Close section

 



Local pipe



Sealed, same way for gas side



Pipe cover



Do not use a wrench here.



Refrigerant leakage may result. Use 2 wrenches here.



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.

1 Set the operation mode (cooling/heating) using SW4-2. 2 Turn on SW4-1 to start test run with the operation mode set by SW4-2. 3 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 not a problem with the 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 because pressure difference is small in the refrigerant circuit.

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

<SW4>



ON OFF



 Stop  Operation  Cooling  Heating

(PUZ only)

10 TROUBLESHOOTING

OCH512

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 trouble shooting and ascertain the cause of the trouble according to “10-5. Troubleshooting of problems”.

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 concerning of parts such as electrical component, controller board, remote controller and etc.

Re-check the abnormal symptom.

Conduct trouble shooting and ascertain the cause of the



trouble according to “10-5. Troubleshooting of problems”. 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.

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 (L1, L2) on the outdoor unit by 500V Megger and check that it is 1.0M" or over. w Do 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 “12. FUNCTION SETTING”.

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

"TEST RUN" and the currently selected

OCH512

operation mode are displayed alternately.

Displays the remaining test run time.







[TEST] button



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.







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.

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

Pipe (liquid) temperature

7. Register the contact number.

• 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 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 blink. As to INDOOR BOARD LED, LED1 will be lit, LED2 will either be lit 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. (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 does not 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

cannot be operated.

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

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)

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

system startup. (Normal)

• Incorrect connection of outdoor terminal block (L1, L2, and S1, S2, S3.)

• Outdoor unit’s protection device connector is open.

Cause

blink alternately. <F5>

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.

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

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

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

green lights up. <00>

• 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)

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 inferior phenomena

LCD

U1~UP

Malfunction outdoor unit

F3~F9

Malfunction outdoor unit

E0~E5

Remote controller transmitting error Indoor/outdoor unit communication error

E6~EF

----

No error history No applied unit

FFFF

Forced compressor stop(due to water leakage abnormality)

Contents of inferior phenomena

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

LED1 (microprocessor power supply) LED2 (remote controller) LED3 (indoor/outdoor communication)

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.



OCH512

,



COOL

ON/OFF

MODE

CHECK

TEST RUN

SET

TEST

RUN

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

min





Test run [for IR 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 turned off status of remote controller

display.)

TEST RUN

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

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

OCH512

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 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

ON/OFF

button.















Error code (2 or 4 digits)



(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 shut off.



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



Switch to self-diagnosis mode.

Press the The display content will change as shown below.



CHECK

button twice within 3 seconds.

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





Display self-diagnosis results. <When there is error code history> (For the definition of each error code, refer to the indoor unit's installation manual or service handbook.)

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

OCH512

Press the

ON/OFF

CHECK

ON/OFF

The self-diagnosis address or refrigerant address will blink.

 Cancel self-diagnosis.

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

 Press the

button twice within 3 seconds.

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

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

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

CHECK

The display content will change as shown below.

button for 5 seconds or more.

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. © Transmission is not possible.

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

After 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.

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

OCH512

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 intermittent 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.

OCH512

[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 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.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

IR wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks  Check code

(Number of times)

1P1 2

P9 3E6,E7 4P4

PA 6P6 7EE 8P8 9E4, E5

10 11

– –

12 Fb

–

E0, E3 –E1, E2

Intake sensor error Pipe (TH2) sensor error Pipe (TH5) sensor error Indoor/outdoor unit communication error Drain sensor error/Float switch connector open 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 Remote controller signal receiving error

– –

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

Remote controller control board error

1st2

Off

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

· · · Repeated

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]

IR 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)

1 2

3 4

5 Abnormal high discharging temperature/insufficient refrigerant 6

7 8

9 11 12

13 14

E9 UP

U3,U4 UF

U2 U1,Ud

U5 U8 U6

U9,UH

– –

Others

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 pressure (63H operated)/Overheating protection operation

Abnormal temperature of heatsink

Outdoor unit fan protection stop

Compressor overcurrent interruption/Abnormal of power module

Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/Current sensor error

– –

Other errors

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

*1If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and

the OPERATION INDICATOR lamp does not come on, there are no error records.

*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.

10-4. SELF-DIAGNOSIS ACTION TABLE

OCH512

Error Code

Abnormal point and detection method

1 No voltage is supplied to termi-

nal block (TB1) of outdoor unit.

a) Power supply breaker is b) Contact failure or disconnecc) Open phase (L1 or L2

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

Case

1 Check following items.

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

turned off.

c) Connection of power supply terminal block

tion of power supply terminal phase)

Judgment and action

(TB1) (TB1)

None

2 Electric power is not charged to

power supply terminal of outdoor power circuit board.

a) Contact failure of power sup-

ply terminal

b) Open phase on the outdoor

power circuit board Disconnection of connector TABT or TABS

3 Electric power is not supplied

to outdoor controller circuit board.

—

a) Disconnection of connector

(CNDC)

4 Disconnection of reactor (DCL)

5 Disconnection of outdoor noise

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

It is especially needed to check

the resistance RS1 on the noise filter circuit board.

6 Defective outdoor power circuit

board

2 Check following items.

a) Connection of power supply terminal block

(TB1)

b) Connection of terminal on outdoor power

circuit board Disconnection of connector TABT or TABS Refer to 10-9.

3 Check connection of the connector (CNDC)

on the outdoor controller circuit board. Refer to 10-9.

4 Check connection of “L1” and “L2” on the

active filter module. (ACTM) Refer to 10-9.

5 a) Check connection of outdoor noise filter

circuit board.

b) Replace outdoor noise filter circuit board.

Refer to 10-9.

6 Replace outdoor power circuit board.

(5201)

63H connector open

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

7 Defective outdoor controller cir-

cuit board

1 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63H

3 63H is operating due to

defective parts.

4 Defective outdoor controller

circuit board

7 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 10-9.

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

OCH512

(6844)

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.

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 4 or more indoor units are

connected to 1 outdoor unit.

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 polarity

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

2 Check diameter and length of indoor/outdoor

unit connecting wire. Total wiring length: 80m [262ft] (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.

(6845)

(6846)

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.

Start-up time over

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

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.

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)

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

and EC.

8 Noise has entered into power

supply or indoor/outdoor unit connecting wire.

OCH512

Error Code

(1302)

Abnormal point and detection method

High pressure (High-pressure switch 63H operated)

Abnormal if high-pressure switch 63H operated ( w ) during compressor operation. w 4.15 MPa [602PSIG]

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 the defect.

7 Check if stop valve is fully open. 8 Check piping and repair the defect.

9~2 Check outdoor unit and repair the defect.

3 Check the inspected temperature of outside

temperature thermistor on LED display.

(SW2 on A-Control Service Tool : Refer to

10-10.)

4~6 Turn the power off and check F5 is displayed when the power is on again. When F5 is displayed, refer to “Judgment

and action” for F5.

7 Check linear expansion valve. Refer to 10-6, 7. 8 Replace outdoor controller board.

(TH32: 1132)

(TH32: 5132)

High comp.shell temperature

Abnormal if comp.shell temperature thermistor (TH32) exceeds 125: [257˚F].

Open/short circuit of comp.shell thermistor (TH32)

Abnormal if open (3: [37˚F] or less) or short (217: [422˚F] 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

1 Disconnection or contact failure

of connector (TH32) 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 on again.

When U3 is displayed, refer to “Judgement

and action” for U3. 5 Check linear expansion valve. Refer to 10-6, 7.

1 Check connection of connector (TH32) on the

outdoor controller circuit board.

Check breaking of the lead wire for thermistor

(TH32). Refer to 10-9.

2 Check resistance value of thermistor (TH32)

or temperature by microprocessor. (Thermistor/TH32: Refer to 10-6.) (SW2 on A-Control Service Tool: Refer to

10-10.) 3 Replace outdoor controller board.

Error Code

OCH512

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 is inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting. WCheck which unit has abnormality in its thermistor by switching the mode of SW2. (PAC-SK52ST) (Refer to 10-10.)

Case

1 Disconnection or contact failure

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

(

CN3

2 Defective thermistor 3 Defective outdoor controller

circuit board

)

Judgment and action

1 Check connection of connector (TH3,TH6/TH7)

on the outdoor controller circuit board.

Check connection of connector (CN3) on the

outdoor power circuit board.

Check breaking of the lead wire for thermistor

(TH3,TH6,TH7,TH8). Refer to 10-9.

2 Check resistance value of thermistor

(TH3,TH6,TH7,TH8) or check temperature by microprocessor.

(Thermistor / TH3, TH6, TH7, TH8 : Refer to

10-6.)

(SW2 on A-Control Service Tool: Refer to

10-10.) 3 Replace outdoor controller circuit board. WEmergency operation is available in case of abnormalities of TH3, TH6 and TH7. Refer to 10-8.

(4230)

Symbol Name

TH3 TH6 TH7 TH8

Temperature of heatsink

Abnormal if heatsink thermistor (TH8) detects temperature indicated below. A42N··························84:, 183˚F

Thermistors

Thermistor <Outdoor pipe>

Thermistor <Outdoor 2-phase pipe>

Thermistor <Outdoor>

Thermistor <Heatsink>

– 40[-40°F] or below – 40[-40°F] or below – 40[-40°F] or below – 27[-17°F] or below

1 The outdoor fan motor is

locked.

2 Failure of outdoor fan motor 3 Air flow path is clogged. 4 Rise of ambient temperature 5 Defective thermistor 6 Defective input circuit of

outdoor power circuit board

7 Failure of outdoor fan drive

circuit

Open detection Short detection

90[194°F] or above 90[194°F] or above 90[194°F] or above

102[216°F] or above

12 Check outdoor fan. 3 Check airflow path for cooling. 4 Check if there is something which causes

temperature rise around outdoor unit. (Upper limit of ambient temperature is 46: [114˚F].) Turn off power, and on again to check if U5 is displayed within 30 minutes. If U4 is displayed instead of U5, follow the action to be taken for U4. 5 Check resistance value of thermistor (TH8)

or temperature by microprocessor. (Thermistor/TH8: Refer to 10-6.) (SW2 on A-Control Service Tool: Refer to

10-10.)

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

Power module

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

(4250)

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

converse of compressor wiring connection

4 Defective compressor 5 Defective outdoor power circuit

board

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

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

4 Check compressor referring to 10-6. 5 Replace outdoor power circuit board.

Error Code

OCH512

(4400)

Abnormal point and detection method

Outdoor fan motor

Abnormal if the rotational frequency of fan motor is not detected during DC fan motor operation. Fan motor rotational frequency is abnormal if;

• 100 rpm or below detected continuously for 15 seconds at 20: [68˚F] or more outside air temperature.

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

Case

1 Failure in the operation of the

DC fan motor

2 Failure in the outdoor circuit

controller board

Judgment and action

1 Check or replace the DC fan motor. 2 Check the voltage of the outdoor circuit

controller board during operation.

3 Replace the outdoor circuit controller board.

(when the failure is still indicated even after performing the action 1 above.)

(4220)

(4100)

Overvoltage or voltage shortage and synchronous signal to main circuit

Abnormal if any of followings are detected during compressor operation;

• Decrease of DC bus voltage to 310V

• Instantaneous decrease of DC bus voltage to 200V

• Increase of DC bus voltage to 400V

• Decrease of input current of outdoor unit to 0.5A only if operation frequency is more than or equal to 40Hz or compressor current is more than or equal to 5A.

• Abnormal power synchronous (zero cross) signal

Compressor overcurrent interruption (When compressor locked)

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

1 Decrease of power supply

voltage

2 Disconnection of compressor

wiring

3 Disconnection or loose

connection of CN52C

4 Defective ACT module 5 Defective ACT module drive

circuit of outdoor power circuit board

6 Disconnection or loose

connection of CNAF

7 Defective 52C drive circuit of

outdoor noise filter circuit board

8 Disconnection or loose

connection of CN5 on the outdoor power circuit board

9 Disconnection or loose

connection of CN2 on the outdoor power circuit board

1 Stop valve is closed. 2 Decrease of power supply

voltage

3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective compressor 5 Defective outdoor power board

6 Dip Switch setting for selecting

model is incorrect on the outdoor power circuit board.

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

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

3 Check CN52C wiring. 4 Replace ACT module. 5 Replace outdoor power circuit board.

6 Check CNAF wiring.

7 Replace outdoor noise filter circuit board. 8 Check CN5 wiring on the outdoor power

circuit board. Refer to 10-9. 9 Check CN2 wiring on the outdoor power

circuit board. Refer to 10-9.

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

3 Correct the wiring (U·V·W phase) to

compressor. Refer to 10-9 (Outdoor power circuit board). 4 Check compressor. Refer to 10-6.

5 Replace outdoor power circuit board. 6 Check that the Dip Switch setting is correct

on the outdoor power circuit board by

referring to "Model Select" in "1) Function of

switches" in 10-10.

Current sensor error

• Abnormal if current sensor detects –1.5A

to 1.5A during compressor operation.

(5300)

(This error is ignored in case of test run mode.)

w This error is ignored in case of test run

mode.

• It’s abnormal for 38A the input current or 10 seconds continuous 34A or more.

1 Disconnection of compressor

wiring

2 Defective circuit of current

sensor on outdoor power circuit board

3 Decrease of power supply

voltage

1 Correct the wiring (U·V·W phase) to

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

2 Replace outdoor power circuit board.

3 Check the facility of power supply.

Error Code

OCH512

(4210)

Abnormal point and detection method

Compressor overcurrent interruption

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

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

1 Abnormal if main or sub remote control-

ler cannot receive normally any transmission from indoor unit of refrigerant

address “0” for 3 minutes. (Error code : E0) 2 Abnormal if sub-remote controller could

not receive for any signal for 2 minutes.

(Error code: E0) 1 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) 2 Indoor controller board cannot receive

any signal from remote controller for 2

minutes. (Error code: E4)

Case

1 Stop valve of outdoor unit is

closed.

2 Decrease of power supply volt-

age

3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective fan of indoor/outdoor

units

5 Short cycle of indoor/outdoor

units

6 Defective input circuit of out-

door controller board

7 Defective compressor

1 Contact failure at transmission

wire of remote controller

2 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.

3 Miswiring of remote controller 4 Defective transmitting receiving

circuit of remote controller

5 Defective transmitting receiving

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

6 Noise has entered into the

transmission wire of remote controller.

Judgment and action

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

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

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

Refer to 10-6. W Before the replacement of the outdoor controller circuit board, disconnect the wiring to compressor from the outdoor power circuit board and check the output voltage among phases, U, V, W, during test run. No defect on board if voltage among phases (U-V, V-W and W-U) is same. Make sure to perform the voltage check with same performing frequency.

1 Check disconnection or looseness of indoor

unit or transmission wire of remote controller. 2 Set one of the remote controllers “main”. If there is no problem with the action above. 3 Check wiring of remote controller.

• Total wiring length: max. 500m [1640ft] (Do not use cable o 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 1~3 are not applied. 4 Diagnose remote controllers.

a) When “RC OK” is displayed,

remote controllers 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” or "ERC 00-66" is dis-

played, noise may be causing abnormality.

If the unit is not normal after replacing indoor

controller board in group control, indoor controller board of address “0” may be abnormal.

Remote controller control board

1 Abnormal if data cannot be normally

read from the nonvolatile memory of the

remote controller control board.

(Error code: E1) 2 Abnormal if the clock function of remote

controller cannot be normally operated.

(Error code: E2)

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

1 Abnormal if remote controller could not

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

(Error code: E3) 2 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)

1 Abnormal if indoor controller board could

not find blank of transmission path. (Error code: E5)

2 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)

1 Defective remote controller

1 2 remote controller are set as

“main.” (In case of 2 remote con trollers) 2 Remote controller is connected

with 2 indoor units or more. 3 Repetition of refrigerant

address 4 Defective transmitting receiving

circuit of remote controller 5 Defective transmitting receiving

circuit of indoor controller board 6 Noise has entered into trans-

mission wire of remote control-

ler.

1 Replace remote controller.

1 Set a remote controller to main, and the

other to sub.

2 Remote controller is connected with only one

indoor unit.

3 The address changes to a separate setting. 4~6 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 displayed,

noise may be causing abnormality.

Error Code

OCH512

(6840)

(6841)

(6607

6608)

(0403)

Abnormal point and detection method

Indoor/outdoor unit communication error (Signal receiving error)

1 Abnormal if indoor controller board could

not receive any signal normally for 6 minutes after turning the power on.

2 Abnormal if indoor controller board could

not receive any signal normally for 3 minutes.

3 Consider the unit as abnormal under

the following condition; When 2 or more indoor units are connected to an outdoor unit, indoor controller board could not receive a signal for 3 minutes from outdoor controller circuit board, a signal which allows outdoor controller circuit board to transmit signals.

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.

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.

Case

1 Contact failure, short circuit or

miswiring (converse wiring) of indoor/outdoor unit connecting wire

2 Defective transmitting receiving

circuit of outdoor controller circuit board

3 Defective transmitting receiving

circuit of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

5 Defective fan motor 6 Defective rush current resistor

1 Contact failure of indoor/

outdoor unit connecting wire

2 Defective communication circuit

of outdoor controller circuit board

3 Defective communication circuit

of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

1 Indoor/outdoor unit connecting

wire has contact failure.

2 Defective communication circuit

of outdoor controller circuit board

3 Noise has entered power supply. 4 Noise has entered indoor/

outdoor unit connecting wire.

1 Noise has entered transmission

wire of remote controller.

2 Noise has entered indoor/

outdoor unit connecting wire.

3 Outdoor unit is not a power-

inverter models.

4 Model name of remote

controller is PAR-S25A.

1 Breaking of wire or contact

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

2 Breaking of wire or contact

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

3 Defective communication circuit

of outdoor power circuit board

4 Defective communication circuit

of outdoor controller circuit board for outdoor power circuit board

1 Breaking of wire or contact

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

2 Contact failure of M-NET board

power supply line

3 Noise has entered into M-NET

transmission wire.

Judgment and action

w Check LED display on outdoor controller

circuit board. (Connect A-Control service tool (PAC-SG50ST)) Refer to EA~EC item if LED displays EA~AC.

1 Check disconnecting or looseness of indoor

/outdoor unit connecting wire of indoor unit or outdoor unit.

Check all the units in case of twin indoor unit

system.

2~4

Turn the power off, and on again to check.

If abnormality generates again, replace

indoor controller board or outdoor controller circuit board.

Turn the power off, and detach fan motor from connector (CNF1,2). Then turn the power on again. If abnormality is not displayed, replace fan motor. If abnormality is displayed, replace outdoor controller circuit board.

6 Check RS1 on outdoor noise filter board with

tester. If open is detected, replace the board.

Other indoor controller board may have defect in case of twin indoor unit system.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor or outdoor units.

2~4 Turn the power off, and on again to

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

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire.

2~4 Turn the power off, and on again to

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

12 Turn the power off, and on again to check. Replace indoor controller board or outdoor

controller circuit board if abnormality is displayed again.

3 Replace outdoor unit with power-inverter type

outdoor unit.

4 Replace remote controller with MA remote

controller.

12 Check connection of each connector CN2

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

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

1 Check disconnection, looseness, or breaking

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

2 Check disconnection, looseness, or breaking

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

3 Check M-NET transmission wiring method.

Error Code

OCH512

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 min. to detect. Note 2) Abnormality P8 is not detected in

drying mode.

Cooling range : Indoor pipe temperature

(TH2 or TH5) – intake temperature (TH1) [ -3 deg [-5.4˚F]

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 deg [5.4˚F] [ (Condenser/

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

Case

1 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

2 Converse connection of

extension pipe (on plural units connection)

3 Converse wiring of indoor/

outdoor unit connecting wire (on plural units connection)

4 Defective detection of indoor

room temperature and pipe <condenser/evaporator> temperature thermistor

5 Stop valve is not opened

completely.

Judgment and action

1~4 Check pipe <liquid or condenser/

evaporator> temperature with room temperature display on remote controller and outdoor controller circuit board.

Pipe <liquid or condenser/evaporator>

temperature display is indicated by setting SW2 of outdoor controller circuit board as follows.

Conduct temperature check with outdoor controller circuit board after connecting

(

‘A-Control Service Tool (PAC-SK52ST)’.

Temperature display of indoor liquid pipe Indoor 1

123456

Temperature display of indoor liquid pipe Indoor 2

123456

A-Control Service Tool SW2 setting

Temperature display of indoor condenser/ evaporator pipe Indoor 1

ON OFF

123456

Temperature display of indoor condenser/ evaporator pipe Indoor 2

123456

)

ON OFF

23Check converse connection of extension

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

<M-NET communication error>

Error Code

(6600)

(6602)

(6603)

Abnormal point and detection method

Address duplicate definition

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

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 display at

remote controller indicate the controller that detected abnormality.

BUS BUSY

1. Overtime error by 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.

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

Case Judgment and action

1 There are 2 or more same

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

2 Noise has entered into trans-

mission signal and signal was transformed.

Error is detected if 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.

2 Defective transmitting receiving

circuit of transmission processor

3 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.

2 Transmission quantity has

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

3 Transmission are mixed with

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

Search the unit with same address as abnormality occurred. If the same address is found, 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 after the address is corrected, and turn the power on again. Check transmission waveform or noise on transmission wire.

1 If the works 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.

2 Check transmission waveform or noise on

transmission wire.

1 Check if transmission wire of indoor unit,

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

2 Check if transmission wire of indoor unit,

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

3 Check if terminal block for transmission wire

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

4 Check transmission waveform or noise on

transmission wire.

Error Code

OCH512

(6606)

Abnormal point and detection method

Communication error with communication processor

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

remote controller indicate the controller that detected abnormality.

Case Judgment and action

1 Data of transmission proces-

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

2 Address forwarding from unit

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

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. System returns to normal if abnormality was accidental malfunction. If the same abnormality generates again, abnormality-generated controller may be defective.

(6607)

NO ACK signal

1. Transmitting side controller detects abnormal if a massage was transmitted but there is no reply (ACK) that a message was received. Transmitting side detects abnormality every 30 seconds, 6 times continuously.

Note) The address and attribute displayed

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

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

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

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

2 Extinction of transmission wire

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

• Maximum distance ······ 200m [656ft] Remote controller line

• [39ft])

3 Extinction of transmission wire

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

Type······

With shield wire CVVS, CPEVS With normal wire (no shield) VCTF, VCTFK, CVV CVS, VVR, VVF, VCT

Diameter ····1.25mm

or more

4 Extinction of transmission wire

voltage and signal is caused by over-numbered units.

5 Accidental malfunction of

abnormality-detected controller (noise, lightning surge)

6 Defective of abnormality gen-

erated controller

1 Contact failure of transmission

wire of outdoor unit or indoor unit

2 Disconnection of transmission

connector (CN2M) of outdoor unit

3 Defective transmitting receiving

circuit of outdoor unit or indoor unit

(12m

[AWG16]

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

1 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.

2 Check address switch of abnormality gener-

ated address.

3 Check disconnection or looseness of abnor-

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

4 Check if tolerance range of transmission wire

is not exceeded.

5 Check if type of transmission wire is correct

or not.

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

• If there was no trouble with 1-5 above in different refrigerant system (2 or more outdoor units), judge with 6.

6 If address of abnormality source is the

address that should not exist, there is the unit that memorizes nonexistent address information. Delete useless address information with manual setting function of remote controller.

Only the system FRESH MASTER or

LOSSNAY are connected to, or the system that is equipped with group setting of different refrigerant system.

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

1 During group operation with

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

2 Contact failure of transmission

wire of remote controller or indoor unit

3 Disconnection of transmission

connector (CN2M) of indoor unit

4 Defective transmitting receiving

circuit of indoor unit or remote controller

If there was no trouble with 1-6 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.

From the previous page.

OCH512

Error Code

Abnormal point and detection method

4. If displayed address or attribute is remote controller,

Indoor unit detects abnormality when

indoor unit transmitted to remote controller and there was no reply (ACK).

Case Judgment and action

1 During group operation with

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

2 Contact failure of transmission

wire of remote controller or indoor unit

3 Disconnection of transmission

connector (CN2M) of indoor unit

4 Defective transmitting 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 transmitted to FRESH MASTER and there was no reply (ACK).

6. If displayed address or attribute is LOSSNAY,

Indoor unit detects abnormality when

indoor unit transmitted to LOSSNAY and there was no reply (ACK).

7. If displayed address or attribute is nonexistent,

1 During sequential operation

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

2 Contact failure of transmission

wire of indoor unit or FRESH MASTER

3 Disconnection of transmission

connector (CN2M) of indoor unit or FRESH MASTER

4 Defective transmitting receiving

circuit of indoor unit or FRESH MASTER

1 If the power supply of

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

2 During sequential operation

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

3 Contact failure of transmis-

sion wire of indoor unit of LOSSNAY

4 Disconnection of transmission

connector (CN2M) of indoor unit

5 Defective transmitting receiv-

ing circuit of indoor unit or LOSSNAY

1 The unit of former address

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

2 Abnormality is detected

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

Error Code

OCH512

(6608)

Abnormal point and detection method

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).

Case Judgment and action

1 Transmitting condition is

repeated fault because of noise and the like.

2 Extension of transmission wire

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

• Maximum distance ······ 200m [656ft] Remote controller line ····

• [39ft])

3 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 CVS, VVR, VVF, VCT

Diameter ····1.25mm2 [AWG16]

or more

4 Accidental malfunction of

abnormality-generated

controller

(12m

10-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

Phenomena

1. Remote controller display does not work.

1DC12V is not supplied to remote controller.

(Power supply display is not indicated on LCD.)

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

no display is indicated.

• “PLEASE WAIT” is not displayed.

• “PLEASE WAIT” is displayed.

Factor Countermeasure

1 Check transmission waveform or noise on

transmission wire.

2 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.

1Check LED2 on indoor controller board. (1) When LED2 is lit. Check the remote controller wiring for breaking or contact failure. (2) When LED2 is blinking. Check short circuit of remote controller wiring. (3) When LED2 is not lit. Refer to phenomena No.3 below. 2Check the following.

• Failure of remote controller if “PLEASE WAIT” is not displayed

• Refer to phenomena No.2 below if “PLEASE WAIT” is displayed.

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

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

1At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to start up.

2Communication error between the remote controller

and indoor unit

3Communication error between the indoor and outdoor

unit

4Outdoor unit protection device connector is open.

1After cancelling to select function from the remote

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

1Normal operation 2Self-diagnosis of remote controller 3”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. 4Check LED display on outdoor controller circuit board. Refer to 10-10. Check protection device connector (63L and 63H) for contact failure. Refer to 10-9.

1Normal operation

Phenomena

OCH512

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

Factor

1The pair number settings of the IR wireless remote controller and indoor controller board are mismatched.

Countermeasure

1Check the pair number settings.

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

6. Remote controller display works

normally and the unit performs cool-

ing operation, however, the capacity cannot be fully obtained. (The air does not cool well.)

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

1No operation for 2 minutes at most after the power

supply ON.

2Hand-held remote controller operation is prohibited.

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

• Hand-held remote controller operation is prohibited

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

3Refer to factor of phenomena No.2 on previous page.

1Refrigerant shortage

2Filter clogging

3Heat exchanger clogging

4Air duct short cycle

1Linear expansion valve fault

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

2Refrigerant shortage

3Lack of insulation for refrigerant piping 4Filter clogging

5Heat exchanger clogging

6Air duct short cycle 7Bypass circuit of outdoor unit fault

1Normal operation 2Normal operation

3Check the details of phenomena No.2 on

previous page.

1 If refrigerant leaks, discharging tempera-

ture rises and LEV opening increases.

Inspect leakage by checking the tempera-

ture and opening. Check pipe connections for gas leakage. 2 Open intake grille and check the filter.

Clean the filter by removing dirt or dust

on it. 3 If the filter is clogged, indoor pipe tem-

perature rises and discharging pressure

increases. Check if heat exchanger is

clogged by inspecting discharging pres-

sure. Clean the heat exchanger.

4 Remove the blockage.

1 Discharging temperature and indoor heat

exchanger temperature does not rise.

Inspect the failure by checking discharging

pressure. Replace linear expansion valve. 2 If refrigerant leaks, discharging tempera-

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

ture and opening. Check pipe connections for gas leakage.

3 Check the insulation. 4 Open intake grill and check the filter. Clean

the filter by removing dirt or dust on it. 5 If the filter is clogged, indoor pipe tem-

perature rises and discharging pressure

increases. Check if heat exchanger is

clogged by inspecting discharging pres-

sure. Clean the heat exchanger.

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

8. 1For 3 minutes after temperature adjuster turns off, the compressor will not start operating even if temperature adjuster is turned on. 2For 3 minutes after temperature adjuster turns on, the compressor will not stop operating even if temperature adjuster is turned off. (Compressor stops operating immediately when turning off by the remote controller.)

12Normal operation (For protection of compressor)

12Normal operation

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

OCH512

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.

Symptoms: Nothing is displayed on the remote controller 

OCH512

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.

AC 187V to AC 253V?

YES

Check the voltage of indoor controller board (CN2D).

NO Check the voltage among L1 and L2

on the terminal block (TB1) of the outdoor power circuit board.

AC 187V to AC 253V?

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.

AC 187V to AC 253V?

YES

•

Troubles concerning

power supply

• Bad wiring of the outdoor controller board

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

Inspection method and troubleshooting

• Check the power wiring to the outdoor unit.

• Check the breaker.

• 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.

DC 12V to DC 16V?

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

DC 12V to DC 16V?

YES

• 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 indoor/outdoor connecting wire

• Defective indoor power board

• 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.

• Replace the indoor power board.

Symptoms: Nothing is displayed on the remote controller 

OCH512

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

Diagnosis flow Cause

Check the voltage between S1 and of the indoor

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

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

unit.

AC 187V to AC 253V?

YES

Check the status of the indoor controller board LED3 display.

Blinking

Is the refrigerant address “0”?

YES

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

does not 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.

Symptoms: Nothing is displayed on the remote controller 

OCH512

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.

• Before repair

OCH512

Frequent calling from customers

Phone Calls From Customers How to Respond Note



Unit does not operate at all.

Remote controller

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.



“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.)

 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 microprocessor’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 or thermostat.

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

 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 blower 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.

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

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

Phone Calls From Customers How to Respond Note

OCH512

The room cannot be cooled or heated sufficiently.



Sound comes out from the air conditioner.

Something is wrong with the blower…..

A 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 does not match the setting of the remote controller during DRY operation.(No air comes out sometimes during DRY operation.)



The fan speed does not 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 not 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 microprocessor to prevent overcooling and to ensure efficient dehumidification. 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 0 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 fan is stopped to prevent cold air coming out of the indoor unit.

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.

Phone Calls From Customers How to Respond Note

OCH512



Something is wrong with the blower…..

Something is wrong with the airflow direction….

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.

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 does not 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 microprocessor 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.

 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 “auto recovery feature from power ”.

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

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).

There might be a case that “CENTRALLY CONTROLLED INDICATOR displayed.

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

” will not be

Phone Calls From Customers How to Respond Note

OCH512

A white mist is expelled from the indoor unit.

Water or moisture is expelled from the outdoor unt.

The display of IR wireless remote controller gets dim or does not come on. The indoor unit does not 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. * Use 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.

10-6. HOW TO CHECK THE PARTS

OCH512

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

Parts name

Thermistor (TH3) <Outdoor pipe>

Thermistor (TH6) <Outdoor 2-phase pipe>

Thermistor (TH7) <Outdoor>

Thermistor (TH8) <Heatsink>

Thermistor (TH32) <Shell>

Fan motor (MF1,MF2)

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

Check points

Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10~30, 50°F~86°F)

TH32

Normal

160k~410k

Abnormal

TH3 TH6

4.3k~9.6k

Open or short TH7 TH8

39k~105k

Refer to next page.

Measure the resistance between the terminals with a tester.



A42

, 68°F)

Abnormal

Open or short

(At the ambient temperature 20

Normal

2350$170

Motor for compressor (MC)

Linear expansion valve (LEV-A)

Gray

Orange Red Yellow Black

1 2 3 4 5 6

Measure the resistance between the terminals with a tester.



(Winding temperature 20

, 68°F)

Normal Abnormal

A42

Open or short

0.302

Disconnect the connector then measure the resistance with a tester. (Winding temperature 20, 68°F)

Normal

Gray - Black Gray - Red

Gray - Yellow

Gray - Orange

46$3

Abnormal

Open or short

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

OCH512

Notes



· High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay 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 Self check



Symptom : The outdoor fan cannot turn around.

Fuse check

Check the fuse (F5) on outdoor controller board.

board and fan motor.)

Did the fuse blow?

Wiring contact check

Contact of fan motor connector (CNF1, 2)

Is there contact failure?

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).

Wiring recovery

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.

10-7. HOW TO CHECK THE COMPONENTS

OCH512

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 (:): R T (˚F): R

t =15exp{3480(

T =15exp{3480(

0:[32˚F] 15k" 10:[50˚F] 9.6k"

273+t – 273

273+(T– 32)/1.8 – 273

30:[86˚F] 4.3k"

40:[104˚F] 3.0k" 20:[68˚F] 6.3k" 25:[77˚F] 5.2k"

Medium temperature thermistor

• Thermistor <Heatsink> (TH8) Thermistor R50 = 17k" ± 2%

B constant = 4170 ± 3% t (:): Rt =17exp{4170( T (˚F): R

T=17exp{4170(

1 1

273+t – 323

273+(T– 32)/1.8 – 323

0:[32˚F] 180k" 25:[77˚F] 50k" 50:[122˚F] 17k" 70:[158˚F] 8k" 90:[194˚F] 4k"

)}

1 1

)}

Resistance (k)

-20-100 1020304050

-4 -14 32 50 68 86 104122

200

150

100

Resistance (k)

Temperature



°F

High temperature thermistor

• Thermistor <Shell> (TH32)

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

t (:): Rt =7.465exp{4057( T (˚F): R

T =7.465exp{4057(

20:[68˚F] 250k" 30:[86˚F] 160k" 40:[104˚F] 104k" 50:[122˚F] 70k" 60:[140˚F] 48k"

273+t – 393

273+(T– 32)/1.8 – 393

70:[158˚F] 34k" 80:[176˚F] 24k" 90:[194˚F] 17.5k" 100:[212˚F] 13.0k" 110:[230˚F] 9.8k"

)}

1 1

)}

Resistance (k)

500

400

300

200

100

25 50 75 100 110 125 77 122 167 212 230 257

Temperature

50 75 100 120

122 167 212 248°F

Temperature



°F

Linear expansion valve

OCH512

(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 outdoor controller board and the linear expansion valve>

Outdoor controller board

DC12V

Gray

Orange

Red

Yellow

Black

Drive circuit

LEV

Connector LEV-A

OFF

ON OFF OFF

Output

5678

OFF

Output

(Phase)

:1 :2

:3 :4

234

OFF

(2) Linear expansion valve operation

Valve position (capacity)

Open

OFF OFF

ON ON

OFF OFF OFF

ON OFF 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 A point in order to define the valve position.

(The pulse signal is being sent for about 20 seconds.) When the valve moves smoothly, there is no sound or vibration

occurring from the linear expansion valve; however, when the pulse number moves from B to A or when the valve is locked, sound can be heard than normal situation.

No sound is heard when the pulse number moves from

B to A i n

case coil is burn 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 tightening (about 32 pulse)

Pulse number

500 pulse Opening a valve all the way

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

OCH512

<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 wound 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.

10-8. EMERGENCY OPERATION

OCH512

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

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

LWhen following abnormalities occur, emergency operation will be available.

Error code

E8 E9

E0 ~ E7

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

1 Make sure that there is no abnormality in outdoor unit other than the above abnormalities. (Emergency operation will not

be available when error codes other than the above are indicated.)

2 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.)

3 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.

4 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.

5 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

1 Turn the main power supply off. 2 Turn on the emergency operation switch (SWE) on indoor controller board. 3 Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to ON. 4 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 pins

SW4

Heating

1 2 Cooling

OFF

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

(4) Releasing emergency operation

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

board to OFF.

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

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

SW4

1 2 Cooling

Heating (PUZ only)

(5) Operation data during emergency operation

OCH512

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 data

Intake temperature (TH1) 27:, 81°F 20.5:, 69°F

Indoor ﬂ uid pipe temperature (TH2) 5:, 41°F 45:, 113°F

Indoor 2-phase pipe temperature (TH5) 5:, 41°F 50:, 122°F

Set temperature 25:, 77°F 22:, 72°F

Outdoor ﬂ uid pipe temperature (TH3) 45:, 113°F 5:, 41°F (w1)

Outdoor 2-phase pipe temperature (TH6) 50:, 122°F 5:, 41°F (w1)

Outdoor air temperature (TH7) 35:, 95°F 7:, 45°F (w1) Temperature difference code

(intake temperature - set temperature) (∆Tj) Discharge super heat (SHd)

Sub-cool (SC)

w1: 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.

w2: If one thermistor is set to open/short, the values of SHd/SC will be different from the list above.

Operation mode

COOL HEAT

30˚C, 54˚F30

5˚C, 9˚F5

C, 54˚F

C, 9˚F

Remarks

(w2)

[Example] When liquid temperature thermistor (TH3) has an open or short circuit.

Thermistor COOL HEAT

TH3 45:, 113°F 5:, 41°F

TH6

Regard normal ﬁ gure as effective data.

TH32

Regard normal ﬁ gure as effective data. TH5 5:, 41°F 50:, 122°F TH2 5:, 41°F 45:, 113°F

Discharge superheat (SHd) Cooling = TH32 - TH6 = Tc - Ta Heating = TH32 - TH5 = Td - (50: or 122°F) Degree of subcooling (SC) Cooling = TH6 - TH3 = Ta - (45: or 113°F) Heating = TH5 - TH2 = 50: - 45: = 5 ˚C. or = 122°F - 113°F = 9˚F

Ta Tb

Tc Td

10-9. TEST POINT DIAGRAM

OCH512

Outdoor controller circuit board PUZ-A42NHA5 PUZ-A42NHA5-BS

PUY-A42NHA5 PUY-A42NHA5-BS

<CAUTION> TEST POINT1 is high voltage.

SW7

Demand control setting

SW6

Model select

SW4

Test operation

SWP

Pump down

SW5

Function switch

SW8

Wiring replace CNM

Connect to A control service tool

CNMNT Connect to M-NET adapter (CN5)

CNVMNT Connect to M-NET adapter (CND)

LEV-A

Linear expansion valve

TH3

Thermistor <Outdoor pipe>

TH7/6

Thermistor <Outdoor/2-phase pipe>

TH32

Thermistor <Shell>

63H

High pressure switch

V (TEST POINT 4)

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

7(+)-4(-))

(CNF1

SW1

Forced defrost, detect history record reset, refrigerant address

CN51

External signal output

• Compressor operating signal

• Abnormal signal

CNDM

1 to 2: Input of low-level sound priority mode 1 to 3: Input of external contact point

CN52C

(Connect to the noise filter circuit board (CN52C))

CN4

Transmission to outdoor power circuit board (CN4)

SV2

Bypass valve <A24/30/36 only>

21S4

Four-way valve <PUZ only>

CN2

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

power circuit board 2-5: Zero cross signal (0-5V DC) 3-4:

18V DC

6-5: 16V DC 7-5: 16V DC

CNAC

2 to 4: Power supply for outdoor controller circuit board (208V-230V AC) 1 to 3: Power supply for indoor and outdoor unit connection wire (208/230V AC)

VSP (TEST POINT 3)

(Voltage between pins of C5A, C5B): DC 0V (when stopped), DC 1– 6.5V (when operated)

CNF1, CNF2 Connect to the fan motor

1-4: 280V DC 5-4: 15V DC 6-4: 0-6.5V DC 7-4: 15V DC (When stopped)

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

CNDC

280V DC (1+, 3-) (Outdoor power circuit board)

CNS

S1-S2: A208/230V AC

+ -

Communication power supply D71 Voltage 24V DC

Outdoor noise filter circuit board

OCH512

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

RS1

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

LO, NO Voltage of 208/230V AC is output (Connect to the outdoor power circuit board (TABS, TABT))

CNAC1, CNAC2 208/230V AC (Connect to the outdoor controller circuit board (CNAC))

EI Connect to the earth

E2 Connect to the earth

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

LI, NI Voltage of 208/230V AC is input. (Connect to the terminal block (TB1))

Outdoor power circuit board

OCH512

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

CN2 Connect to the outdoor controller circuit board (CN2) 1-5:Transmitting signal to the outdoor controller circuit board (0~5V DC)

2-5:Zero cross signal (0~5V DC) 3-4:18V DC 6-5:16V DC 7-5:16V DC

CNAF Connect to ACTM

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

1. Check of diode bridge TABP1-TABS, TABN1-TABS, TABP1-TABT,TABN1-TABT

2. Check of DIP-IPM P-U, P-V, P-W, N-U, N-V, N-W

CNDC 280-380V DC (1+, 3–)

DIP-IPM

Connect to the outdoor controller circuit board

TABS/TABT Connect to the outdoor noise filter circuit board Voltage among phases: 208/230V AC

CN3 Thermistor (TH8) <Heatsink>

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

CN4 Connect to the outdoor controller circuit board (CN4)

TABP2/SC-P2 Connect to ACTM

TABN Connect to the smoothing capacitor CB – (A42N only)

TABP Connect to the smoothing capacitor CB + (A42N only)

TABU/V/W Connect to the compressor (MC) Voltage among phases: 10V~180V AC

TABP1 Connect to 52C

TABN1 Connect to ACTM

TABN2 Connect to ACTM

Active filter module

OCH512

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

L1, L2 Connect to the DCL (Reactor)

P Connect to the outdoor power circuit board (TABP2)

N1 Non-connect

Upper side

Connect to the outdoor power circuit board (TABP1)

–

Connect to the outdoor power circuit board (TABN1)

Connection and internal circuit diagram

(+)

(–)

Connect to the outdoor power circuit board (CNAF) 1 : GND 2-1 : 18V DC 3-1 : Control signal 4, 5 : Not used 6-1 : Control signal

DCL

L1 L2

ACTM

N1 N2

Lower side

N2 Non-connect

Io Connect to the outdoor power circuit board (TABN2)

Load

Tester check points of Active ﬁ lter module

Error condition Normal value (reference)

(–) and Io open less than 1

(–) and L2

P and L2

P and Io

L2 and Io

1. The symptom when the unit is in open error condition is described to determine open error by tester check.

2. SW2 setting : Code "20" display

short 100k" ~ 1M open short 100k" ~ 1M" open short 100k" ~ 1M open short 100k" ~ 1M" open

ON OFF

Symptom when the unit is in trouble

The unit does not operate (can not be switched ON)

The breaker operates

The unit does not operate (can not be switched ON) 2 U9 Abnormal stop (W2)

The breaker operates

The unit does not operate (can not be switched ON) 2 U9 Abnormal stop (W2)

The breaker operates

The unit does not operate (can not be switched ON) 2 U9 Abnormal stop (W2)

The breaker operates

The unit does not operate (can not be switched ON) 2 U9 Abnormal stop (W2)

10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

OCH512

(1) Function of switches

The black square (■) indicates a switch position.

Type

switch

Dip

switch

Push

switch

Switch

SW1

SW4

SW8

SWP

No.

1 2

Function Effective timing

Forced defrost

1 Start Normal

Abnormal history clear

123

Refrigerant address

setting

1 2 1 2

Separate indoor/outdoor

Test run Operating OFF

Test run mode setting Heating Cooling

No function — — No function

unit power supplies

123

Pump down Start Normal

Action by the switch operation

ON OFF

Clear Normal Off or operating

456ON123456ON123456ON123456

0123

456ON123456ON123456ON123456

4567

456ON123456ON123456ON123456

891011

456ON123456ON123456ON123456

12 13 14 15

—

Used Not used

When compressor is operating in heating operation. +1

When power supply ON

Under suspension

— —

When power supply ON

Under suspension

w1 Forced defrost should be done as follows.

1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON. 2 Forced defrost will start by the above operation 1 if all 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°C [46°F]. 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.

Type of

OCH512

Switch

Dip

switch

Switch

SW5

SW7

SW9

SW6

SW5

No.

1 2

3,4,5

6 1

Function Effective timing

No function

Power failure

automatic recovery +2

No function

Model select

Setting of demand control

Max. Hz setting(cooling)

Max. Hz setting(heating)

4 5 6 1 2

3,4

No function

Defrost setting

No function

Function switch

No function

1 2 3 4 5

Model select

6 7 8 5 6

Action by the switch operation

ON OFF

—

Auto recovery

—

No auto recovery

—

Following SW5-6 reference

SW7-1 SW7-2

OFF

Max. Hz(cooling) Max. Hz(heating)

OFF OFF

% 0.8

—

For high humidity

—

Valid

—

MODEL SW6 SW5-5.6

PUZ-A42N

MODEL SW6 SW5-5.6

PUY-A42N

The black square (■) indicates a switch position.

HA5

OFF

123456

OFF

123456

Power consumption (Demand switch ON)

0% (Operation stop)

50% 75%

Normal Normal

—

Normal

—

Normal

—

OFF

123456

—

When power supply ON

—

Always

Always Always

—

Always

—

Always

—

w2 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 not all units have DIP SW. Please refer to the indoor unit installation manual. w3 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)) w4 Please do not use SW7-3~6 usually. Trouble might be caused by the usage condition.

(2) Function of connector

Action by open/ short operation

Types

Connector

CN31

Function Effective timing

Short Open

Emergency operation

Start

Normal

When power supply ON

Special function

OCH512

(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.

W The performance depends on the load of conditioned outdoor temperature. How to wire

Purchased locally

Relay supply

SW1

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

<Low-level sound priority mode circuit>

Insulate this point securely as this is not used.

Max. 10 m[33ft] including local wiring

Adaptor 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 Adaptor for external signal input (PAC-SC36NA).

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

(b) 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 the same as (a). Connect an SW1 which is procured at field to the between Orange and Red (1 and 3) of the Adaptor for external signal input (PAC-SC36NA), and insulate the tip of the brown lead wire.

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

OFF OFF

Power consumption

(SW1 on)

0% (Operation stop)

50% 75%

OCH512

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

Connector (63H) is open.

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.

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

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

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

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 (63H) on the outdoor controller board

is not disconnected.



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

—



Check if indoor/outdoor connecting wire is connected correctly.



Check if 4 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.

E4 E5

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.34~

page

P.27 P.28

(EA) P.28 (Eb) P.28

(EC)

+2 +2

P.33 (E8)

P.33 (E9)

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

P.33

P.37

Indication Error

OCH512

Outdoor controller board

LED1 (Green) 3 blinking 1 blinking

LED2 (Red)

Abnormality of shell thermistor (TH32)

2 blinking

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

3 blinking

Abnormality of outdoor fan

Contents Inspection method

Error

code

Check if stop valves are open.

Check if connectors (TH32, LEV-A) on outdoor controller board are not disconnected.

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

expansion valve using a tester.

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

Check if connector (63H) 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.

motor rotational speed

Check if stop valves are open.

4 blinking

5 blinking

Compressor overcurrent breaking (Start-up locked)

Compressor overcurrent breaking Abnormality of current sensor (P.B.) Abnormality of power module Open/short of shell thermistor (TH32)

Open/short of outdoor thermistors

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.

UP UH U6



Check if connectors (TH3, TH6, TH7 and TH32) on outdoor controller board and conn-

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



Measure resistance value of outdoor thermistors.

(TH3, TH6, TH7 and TH8)

6 blinking

7 blinking

Abnormality of heatsink temperature

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

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

Measure resistance value of outdoor heatsink thermistor(TH8).

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.

Detailed

reference

page

P.29

P.31

P.31 P.32

P.31 P.30

P.29 P.30

P.30 P.31

4 blinking

1 blinking

Abnormality of room temperature thermistor (TH1) Abnormality of pipe temperature thermistor /Liquid (TH2) Abnormality of pipe temperature thermistor/Condenser-Evaporator(TH5)

2 blinking

Abnormality of drain sensor (DS)

Float switch connector open(FS) Indoor drain overflow protection

3 blinking

Freezing (cooling)/overheating (heating) protection

4 blinking

Abnormality of pipe temperature

5 blinking

Abnormality of indoor controller board

––

Abnormality of remote controller board

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

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

are not disconnected. Measure resistance value of indoor thermistors.

P2 P9

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 pump using a tester. Check if drain pump 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) Replace indoor controller board.

Replace remote controller.

E1 E2

2 2

2

P.32

OCH512

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

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

Operation indicator SW2 : Indicator change of self diagnosis

SW2 setting

1ON23456

(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) 1Operation mode display

Display detail

The black square (■) indicates a switch position.

Explanation for display

1 second

interval

Unit

(Lighting)

SW2

LED1

1ON23456

The tens digit : Operation mode

Display Operation Model

O C H

2Display during error postponement Postponement code is displayed when compressor stops due to the work of protection device. Postponement code is displayed while error is being postponed.

(3) When the display blinks Inspection code is displayed when compressor stops due to the work of protection devices.

Display

E0~E7

Inspection unit

Outdoor unit

Indoor unit 1

Indoor unit 2

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

OFF / FAN

COOLING / DRY +

HEATING

DEFROSTING

Display

The ones digit : Relay output

Display

0 1 2 3 4 5 6 7 8 A

Contents to be inspected (During operation) Abnormal high pressure (63H operated)

Abnormal high discharging temperature, shortage of refrigerant

Open/short circuit of shell thermistor (TH32)

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

Abnormal temperature of heatsink

Abnormality of power module

Abnormality in outdoor fan motor.

Compressor overcurrent interruption (When Comp. locked)

Current sensor error

Compressor overcurrent interruption

Abnormality of indoor units

P1~P8

Communication error of M-NET system

A0~A7

Warming-up Compressor

— — — — — — —

— ON ON

Compressor

— — —

— ON ON ON ON

—

4-way valve

—

— ON ON

—

— ON ON

— ON

(Initial setting)

Solenoid valve

—

— —

SW2 setting

OCH512

1ON23456

Display detail

Pipe temperature / Liquid(TH3) – 40~194

The black square (■) indicates a switch position.

Explanation for display

– 40~194 (– 40~90:) (When the coil thermistor detects 0˚F or below, “–” and temperature are displayed by turns.) (Example) When -10˚F;

0.5 secs. 0.5secs. 2 secs.

Unit

˚F

1ON23456

Shell temperature (TH32) 37~327

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

37~327 (3~164:) (When the discharge thermistor detects 100˚F or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105˚F;

0.5 secs. 0.5secs. 2 secs.

0~10

0~9999 (When the number of times is 100 or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 42500 times (425 × 100 times);

0.5 secs. 0.5secs. 2 secs.

0~9999 (When it is 100 hours or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 2450 hours (245 × 10 hours);

0.5 secs. 0.5secs. 2 secs.

0~50 wOmit the figures after the decimal fractions.

˚F

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 as below.

(SW2)

1ON23456

Pulse

Code

display

Code

display

SW2 setting

OCH512

1ON23456

Display detail

Pipe temperature/Liquid (TH3) on error occurring – 40~194

The black square (■) indicates a switch position.

Explanation for display

– 40~194 (– 40~90:) (When the coil thermistor detects 0˚F or below, “–” and temperature are displayed by turns.) (Example) When –15˚F;

0.5 secs. 0.5secs. 2 secs.

Unit

˚F

1ON23456

Shell temperature (TH32) on error occurring 37~327

Compressor operating current on error occurring 0~50

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

37~327 (3~164:) (When the temperature is 100˚F or more, the hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130˚F;

0.5 secs. 0.5secs. 2 secs.

0~50

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

˚F

Code

display

Code

display

Thermostat ON time 0~999

1ON23456

Test run elapsed time 0~120

0~999 (When it is 100 minutes or more, the hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 245 minutes;

0.5 secs. 0.5secs. 2 secs.

0~120 (When it is 100 minutes or more, the hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105 minutes;

0.5 secs. 0.5secs. 2 secs.

Minute

SW2 setting

OCH512

1ON23456

Display detail

The number of connected indoor units

The black square (■) indicates a switch position.

Explanation for display

0~3 (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 – 38~190

Displayed as an outdoor capacity code

Capacity

A42N

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

– 38~190 (– 39~88:) (When the temperature is 0ºF or less, “–” and temperature are displayed by turns.)

0 : Normal 1 : For high humidity

Display details

Code

display

Code

display

˚F

1ON23456

Indoor pipe temperature / Cond. / Eva. (TH5(1)) Indoor 1 – 38~190

Indoor pipe temperature / Liquid (TH2(2)) Indoor 2 – 38~190

Indoor pipe temperature / Cond. / Eva. (TH5(2)) Indoor 2 – 38~190

Indoor room temperature (TH1) 46~102

– 38~190 (– 39~88:) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.)

46~102 (8~39:)

˚F

SW2 setting

OCH512

1ON23456

Display detail

Indoor setting temperature 62~86

Explanation for display

62~86 (17~30:)

The black square (■) indicates a switch position.

Unit

˚F

1ON23456

Outdoor pipe temperature / 2-phase pipe (TH6)

-38~190

Outdoor outside temperature (TH7)

-38~190

Outdoor heatsink temperature (TH8)

-40~327

Discharge superheat. SHd 32~360

Cooling = TH32-TH6 Heating = TH32-TH5

-38~190 (-39~88:) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.)

-40~327 (-40~164:) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.) (When the thermistor detects 100˚F or more, hundreds digit, tens digit and ones digit are displayed by turns.)

32~360 (0~182:) (When the temperature is 100˚F or more, hundreds digit, tens digit and ones digit are displayed by turns.)

˚F

1ON23456

Number of defrost cycles 0 – FFFE

Input current of outdoor unit

Targeted operation frequency 0~255

DC bus voltage 180~370

0 – FFFE (in hexadecimal notation) (When more than FF in hex (255 in decimal), the number is displayed in order of 16

's and 162's, and 161's and 160's places. (Example) When 5000 cycles;

0.5 secs. 0.5 secs. 2 secs.

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

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

180~370 (When it is 100V or more, hundreds digit, tens digit and ones digit are displayed by turns.)

2 cycles

0.1 A

SW2 setting

OCH512

1ON23456

Display detail

Capacity save 0~100 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

The black square (■) indicates a switch position.

Explanation for display Unit

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

0.5 secs. 0.5secs. 2 secs.

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

Code

display

1ON23456

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 outside 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. 0.5 secs. 2 secs.

Code

display

Code

display

Code

display

Fan step on error occurring 0~10

1ON23456

0~10

Step

SW2 setting

OCH512

1ON23456

Display detail

LEV-A opening pulse on error occurring 0~480

The black square (■) indicates a switch position.

Explanation for display

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. 0.5 secs. 2 secs.

Unit

Pulse

1ON23456

Indoor room temperature (TH1) on error occurring 46~102

Indoor pipe temperature / Liquid (TH2) on error occurring

-38~190

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

-38~190

Outdoor pipe temperature / 2-phase (TH6) on error occurring

-38~190

46~102 (8~39°C)

-38~190 (-39~88°C) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.) (Example) When –15˚F;

0.5 secs. 0.5 secs. 2 secs.

-38~190 (-39~88°C) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.) (Example) When –15˚F;

0.5 secs. 0.5 secs. 2 secs.

-38~190 (-39~88°C) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.) (Example) When –15˚F;

0.5 secs. 0.5 secs. 2 secs.

˚F

Outdoor outside temperature (TH7) on error occurring

-38~190

1ON23456

Outdoor heatsink temperature (TH8) on error occurring

-40~327

1ON23456

-38~190 (-39~88°C) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.) (Example) When –15˚F;

0.5 secs. 0.5 secs. 2 secs.

-40~327 (-40~164°C) (When the temperature is 0˚F or less, “–” and temperature are displayed by turns.) (When the temperature is 100˚F or more, hundreds digit, tens digit and ones digit are displayed by turns.)

˚F

SW2 setting

OCH512

1ON23456

Display detail

Discharge superheat on error occurring SHd 32~360

Cooling = TH32 -TH6 Heating = TH32 -TH5

The black square (■) indicates a switch position.

Explanation for display Unit

32~360 (0~182˚C) (When the temperature is 100˚F or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 150˚F;

0.5 secs. 0.5 secs. 2 secs.

˚F

1ON23456

Sub cool on error occurring. SC 32~266

Cooling = TH6-TH3 Heating = TH5-TH2

Thermostat-on time until error stops 0~999

U9 Error status during the Error postponement period

32~266 (0~130˚C) (When the temperature is 100˚F or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 115˚F;

0.5 secs. 0.5 secs. 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. 0.5 secs. 2 secs.

Description Detection point Display

Normal Overvoltage error Undervoltage error Input current sensor error. L1 or L2-phase open error. Abnormal power synchronous signal PFC/ACTM error Undervoltage

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

1 phase open error (04) + PFC error (10) = 14

Power circuit board Controller circuit board

Controller circuit board Power circuit board

Check CNAF wiring. Defective ACTM/P .B.

–

00 01 02

04 08 20

˚F

Minute

Code

display

SW2 setting

OCH512

Display detail

Controlling status of compressor operating frequency

The black square (■) indicates a switch position.

Explanation for display

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

•

The tens digit

Display

Compressor operating frequency control Primary current control

Secondary current control

Unit

1ON23456

•The ones digit

activated control is displayed.)

Display Compressor operating frequency control

2 4

(Example) The following controls are activated.

• Primary current control

• Preventive control for excessive temper ature rise of condensing temperature

• Preventive control for excessive temper ature rise of heatsink

(In this digit, the total number of

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 heatsink

LED

Code

display

OCH512

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 (°F) temperature (°F)

Number of ON/OFF Discharge



times (%10 times) temperature (°F) temperature (°F) Operating Outside air Filter operating current (A) temperature (°F) time* (Hours)

* The filter operating time is the time that has elapsed since the filter was reset.

Heat exchanger





Discharge temperature 147 °F

Remove the service panel.

Measure the discharge

Intake air



Heat exchanger





temperature.

L Conventional inspection work

Outdoor unit

Indoor unit

Measure the intake air temperature.

Measure the outside air temperature.

11-1. MAINTENANCE MODE OPERATION METHOD

* If you are going to use the "11-2.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



Operation mode

(1)Press the

[Display

TEST



]

MAINTENANCE

If stable operation is unnecessary or if you want to check the data with the air conditioner stopped, skip to step (4).

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.

button for 3 seconds to switch to maintenance mode.



Compressor information

Outdoor unit information

 

Indoor unit information

Activate/cancel maintenance mode

Confirm

(2)Press the

[Display

(3)Press the

[Display

MODE



]

FIL TER



] Waiting for stabilization

button to select the desired operation mode.

Stable cooling operation

COOL STABLE MODE

Stable heating operation

HEAT STABLE MODE

( ) button to check the setting.

Stable operation cancellation

STABLE MODE CANCEL

Stabilized

After 10 to 20 minutes

Data measurement

OCH512

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

[Display ]

button



Cumulative operation time

COMP ON %10 HOURS

Outdoor unit information

ON/OFF

[Display 

button

Heat exchanger

 

]

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 %100 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

FIL TER

( ) button to check the setting.

[Display example for accumulated operating time]

Display



Waiting for response

Flashing

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

Refrigerant address

Single refrigerant system

In the case of single refrigerant system, the refrigerant address is "00" and no operation is required. Simultaneous twin units belong to this category (single refrigerant system).

[1:1] Refrigerant address=00

Outdoor

unit

Indoor unit

Remote

controller

[Twin] Refrigerant address=00

Outdoor

unit

Indoor unit

Remote

controller

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 one remote controller. To check or set the refrigerant addresses.

Refrigerant address 00

Outdoor

unit

Indoor unit

Remote

controller

Refrigerant address 01

Outdoor

unit

Indoor unit

ON/OFF

Refrigerant address 02

Outdoor

unit

Indoor unit

button.

Refrigerant address 15

Outdoor

unit

Indoor unit

11-2.GUIDE FOR OPERATION CONDITION

OCH512

Inspection item Result

Breaker Good Retightened

Terminal block Outdoor Unit Good Retightened

Loose con-

nection

(Insulation resistance) M

Power supply

(Voltage) V

Compressor

* The filter operating time is the time that has elapsed since the filter was reset.

 Accumulated operating time Time  Number of ON/OFF times Times  Current A



Refrigerant/heat exchanger temperature



Refrigerant/discharge temperature

 Air/outside air temperature COOL °F HEAT °F

(Air/discharge temperature) COOL °F HEAT °F

T emperature

Appearance Good

Outdoor Unit

Heat exchanger Good Sound/vibration None Present

Cleanli-

ness

Air/intake air temperature COOL °F HEAT °F



(Air/discharge temperature) COOL °F HEAT °F



Refrigerant/heat exchanger temperature Filter operating time* Time

T emperature



Decorative panel Good Filter Good

Indoor Unit

Fan Good Heat exchanger Good

Cleanliness

Sound/vibration None Present

Indoor Unit Good Retightened

COOL °F HEAT °F COOL °F HEAT °F

Cleaning required Cleaning required

COOL °F HEAT °F

Cleaning required Cleaning required Cleaning required Cleaning required

Check Points

Enterthe 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

T emperature

Cool

difference

Inspection

T emperature

Heat

difference

* Fixed Hz operation may not be possible under the following tempera-

ture ranges. A)In cool mode, outdoor intake air temperature is 104 °For higher or

indoor intake air temperature is 73 °F or lower.

B)In heat mode, outdoor intake air temperature is 68 °F or higher or

indoor intake air temperature is 77 °F 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 "000" displayed stably in Display  on the remote controller?

(

 Discharge temperature) – ( Outdoor

heat exchanger temperature) (

 Indoor intake air temperature) – (

Indoor heat exchanger temperature) Is "000" displayed stably in Display

on the remote controller? (

 Discharge temperature) – ( Indoor

heat exchanger temperature) (

 Indoor heat exchanger temperature) –

(

 Indoor intake air temperature)



Stable Unstable

°F

Stable Unstable

°F

Area Check item

Normal Filter inspection Inspection A

Inspection B Inspection C

The above judgement is just guide based on Japanese standard

Normal operation state Filter may be clogged. *1 Performance has dropped. Detailed inspection is necessary. Refrigerant amount is dropping. Filter or indoor heat exchanger may be clogged.

Judgment

Cool Heat

conditions.

It may be changed depending on the indoor and outdoor temperature. It may be judged as "filter inspection" due to the outdoor and indoor temperature, even though it is not clogged.

Cool mode Heat mode

°F

Indoor



Inspection C

63 54 45

Filter inspection

Normal

27 18

Inspection A

Indoor intake air temperature)— (



Result

0 18 36 54 72 90 108 126 144

(

heat exchanger temperature)

[ Discharge temperature] – [ Outdoor heat exchanger temperature)

Inspection B

ºF

81 72 63 54 45 36 27 18

Indoor heat exchanger temperature) —

Indoor intake air temperature)





(

[ Discharge temperature] – [ Indoor heat exchanger temperature)

Inspection C

Filter inspection

Normal

Inspection B

Inspection A

18 36 54 72 90 108 126 144

°F°F

12 FUNCTION SETTING

OCH512

12-1. 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 4 setting the indoor unit number.) <Table 1> Function selections

Function

Power failure automatic recovery Indoor temperature detecting

LOSSNAY connectivity

Power supply voltage Frost prevention temperature Humidifier control

Change of defrosting control

Mode No.

Settings

Not available Available Average data from each indoor unit Data from the indoor unit with remote controllers Data from main remote controller Not supported Supported (indoor unit dose not intake outdoor air through LOSSNAY) Supported (indoor unit intakes outdoor air through LOSSNAY) 230V 208V 2 [36°F] (Normal) 3 [37°F] When the compressor operates, the humidifier also operates. When the fan operates, the humidifier also operates. Standard For high humidity

Wired remote controller

(RF thermistor)

(101)

(—)

(103)

(104)

(115)

(116)

(117)

Setting No.

: Initial setting

(when sent from the factory)

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

Remarks

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

Meaning of "Function setting" Mode02 : indoor temperature detecting

OUTDOOR

INDOOR

No.

Indoor temperature(ta)=

REMOTE (MAIN)

No1.

Average data of the sensor on all the

Initial

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

setting

indoor units

No2.

Data of the sensor

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

No3.

Data of the sensor

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

INDOOR

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

INDOOR

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

(2) Functions available when setting the unit number to 01-03 or AL (07 in case of IR wireless remote controller)

OCH512

• When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the indoor unit number.

• When setting functions for a simultaneous twin indoor unit system, set the unit number to 01 to 03 for each indoor unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number.

• When setting the same functions for an entire simultaneous Twin-indoor unit system, set refrigerant address to AL (07 in case of IR wireless remote controller) referring to 4 setting the indoor unit number.

Function

Filter sign

Air flow (

Fan speed

No.of air outlets

Optional high efficiency filter

Vane setting

Optional humidifier (

PLA only

Vane differential setting in heating mode (

cold wind prevention

Swing

Set temperature in heating mode(4 deg up Fan speed when the heating thermostat is OFF

Fan speed when the cooling thermostat is OFF

Detection of abnormality of the pipe temperature (P8

)

) *1

Settings

100h 2500h "Clean the filter" indicator is not displayed Quiet Standard High ceiling 4 directions 3 directions 2 directions Not supported Supported No vanes (Vane No.3 setting : PLA only) Vane No.1 setting Vane No.2 setting Not supported Supported No.1 setting (TH5: No.2 setting (Standard, TH5: 82-90°F (28-32)) No.3 setting (TH5: 90-100

Not available Swing Available Wave air flow Available Not available

Extra low Stop Keeping fan speed set by remote controller Keeping fan speed set by remote controller Stop Detect

)

Neglect

75-82°F (

24-28))

°F (

32-38))

}

PLA-BA

Mode No.

Wired remote controller

(RF thermistor)

(107)

(108)

(109)

(110)

(111)

(113)

(114)

(123)

(124)

(125)

(127)

(128)

Setting No.

: Initial setting (Factory setting

- : Not available

4-Way cassette

PLA-BA

1 2 3 1 2 3 1231 2 1 2 3 1 2 1 2 3 1 2 1 2 1 2 3 1 2 1 2

Ceiling suspended

)

PCA-KA

Mode No.11

Setting No. Settings PLA-BA PCA-KA

Vane No.3 setting No Vanes

2 Vane No.1 setting 3 Vane No.2 setting

* Be careful of the smudge on ceiling.

Less smudging (

Downward position than the standard Standard Less draft *

(

Upward position than the standard

)

No vane function Standard

Less draft *

)

(

Upward position than the standard

)

12-1-1. Selecting functions using the wired remote controller

OCH512

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 with stop the remote controller.)



Specify refrigerant address 00 (outdoor unit).



Specify unit No. 00. (indoor unit)

(Use



Select mode No. 02

(room temperature detection position).



Select setting No. 03 (remote controller fixed).

(Use



and  at the same time



and .)



Enter the setting.

(Press



and .)





For modes 15 and higher, press

(Specified indoor unit: FAN operation)





and  at the same time.

Modes 01 to 14 can be activated by pressing buttons simultaneously, and modes 15 to 28 by pressing buttons





and



and .

YES

Change refrigerant address or unit No.



Enter the setting.

(Press



End function display.

(Press  and  at the same time.)

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



Finished

YES

Example: Selecting room temperature detection position



[Operating Procedure]

OCH512

 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.

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.

display area.

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

FILTER

Refrigerant address display section

FUNCTION

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

SELECTION

Press the

ON/OFF

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

Unit number display section

FUNCTION SELECTION

TEST

 Set the outdoor unit's refrigerant address.

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

Press the [

CLOCK] buttons ( and ) to select the desired

CLOCK] buttons ( and ) to select the unit

number 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.

Press the [

* 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.

and unit 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.

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

 Select the setting content for the selected mode.

will blink, so check the currently set content.

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

will start to blink and registration starts.

Press the

MODE

Mode number display section

Press the [

Press the

Press the

MODE

button to confirm the refrigerant address

"F"

appears and blinks in the unit number display area and the

TEMP] buttons ( and ) to set the desired

button. The currently selected setting number

Setting number display section

button. The mode number and setting number

Setting number 1 = Indoor unit operating average

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



helps you find the location of the indoor unit for which you want to perform function selection. However, if "00" or " 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

setting number.

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

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

MODE

AL" is selected as the unit number, all the indoor

00 refrigerant address

Outdoor unit

Indoor unit

Press the [

Unit number 01 Unit number 02

Remote controller

Mode number 02 = Indoor temperature detection

TEMP] buttons ( and ) to select the desired

Setting number 3 = Remote controller built-in sensor

Fan draft

* 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

conditioner 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.

FILTER

TEST

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

* 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.)

12-1-2. Selecting functions using the IR wireless remote controller (Type C)

OCH512

Functions can be selected with the IR wireless remote controller. Function selection using IR wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the IR wireless remote controller.

[Flow of function selection procedure]

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

SET

FAN

VANE

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

min

CLOCK

ON/OFF

MODE

CHECK

TEST RUN

[Operating instructions]

1 Check the function settings. 2 Press the button twice continuously. CHECK is lit and “00” blinks.

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

CHECK

3 Set the unit number. Press the temp button to set the unit number. (Press “01” to specify the indoor unit whose unit number is 01.) Direct the IR 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 nu mber 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. 4 Select a mode. Press the temp button to set a mode. Press “24” to turn on the function that raises the set temperature by 4 degree during heat operation. Direct the IR wireless remote controller toward the sensor of the indoor unit and press the button.

The sensor-operation indicator will blink and beeps will be heard to indicate the current setting number. Current setting number: 1 = 1 beep (one second) 2 = 2 beeps (one second each) 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. 5 Select the setting number. Press the temp button to select the setting number. (02: Not available) Direct the IR wireless remote controller toward the receiver of the indoor unit and press the button. The sensor-operation indicator will blink and beeps will be heard to indicate the setting number. 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.

6 Repeat steps 4 and 5 to make an additional setting without changing unit number. 7 Repeat steps 3 to 5 to change unit number and make function settings on it. 8 Complete the function settings

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

 Check the function selection setting.

 Switch to function selection mode.

(Enter address "50" in troubleshooting mode, then press the HOUR button.)

 Specify unit No. "01" (since the function applies to unit 01). (Set address "01" while still in troubleshooting mode, then press the MINUTE button.) Note: You can't specify the refrigerant address.

Select mode No. "24" (function that raises set temperature by 4 degrees during HEAT operation).



Troubleshooting mode is the mode entered when you press the CHECK button twice to display "CHECK".





Change unit No.

(Set address "24" while still in troubleshooting mode, then press the HOUR button.)  Select setting No. "02" (OFF).

(Set address "02" while still in troubleshooting mode, then press the HOUR button.)

Finished

YES  End function selection mode. (End troubleshooting mode.)

Note: When you switch to function selection mode on the IR wireless remote controller's operation area, the unit ends function selection mode automatically if nothing is input for 10 minutes or longer.

min

YES

12-2. FUNCTION SELECTION OF REMOTE CONTROLLER

OCH512

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) (2) (3) (1)

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

(1) T emperature display /°F setting ("TEMP MODE /°F") (2) Room

(3)

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

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

Temperature range limit setting ("LIMIT TEMP FUNCTION")

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

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

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

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 (room) air temperature

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

operation with automatic mode

[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:

All operation buttons except [ ON/OFF] button are locked.

 no2:

All operation buttons are locked.  OFF (Initial setting value) : Operation lock setting is not made * T o 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 auto-

matic operation mode, the following settings can be made.

• To switch the setting, press the [ ON/OFF] button.  ON (Initial setting value) : The aut o m a t ic m o d e i s d i s p l a y e d w h e n



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

• To switch the setting, press the [

 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 [

 WEEKLY TIMER (initial setting): The weekly timer can be used.  AUTO OFF TIMER: The auto off timer can be used.  

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

(4) Contact number setting for error situation

• To switch the setting, press the [

 CALL OFF:  CALL **** *** **** : The set contact numbers are displayed in case

of the followings.).

SIMPLE TIMER: The simple timer can be used. TIMER MODE OFF: The timer mode cannot be used.

be used.

the operation mode is selected.

 OFF : The automatic mode is not displayed

CALL_ : The contact number can be set when the display is as

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.

•

T o 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, 67°F~87°F

Upper limit: 30  ~ 19, 87°F~67°F

• 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.

[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 : 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 "A utomatic heating" is displayed

under the automatic mode is running.

 OFF: Only "Automatic" is displayed under the automatic mode.

Heating mode : Lower limit: 17  ~ 28, 63°F~83°F

Upper limit: 28  ~ 17, 83°F~63°F

Automatic mode : Lower limit: 19  ~ 28, 67°F~83°F

Upper limit: 28  ~ 19, 83°F~67°F

Item 3 (Setting content)



ON/OFF] button.

ON/OFF] button (Choose one

ON/OFF] button.

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

of error.

shown on the left.

TEMP. ( ) and

ON/OFF] button.

[Function selection flowchart]

OCH512

Setting language (English)

Change Language

Function selection



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

Japanese



Item 3



OFF

no1



no2



OFF



OFF



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

FILTER

CHECK

CLEAR

TEST



Operation lock setting is not used. (Initial setting value)



All operation buttons except On/Off button are locked.

All operation buttons are locked.

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.

 





Mode selection

Display mode setting

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







One of the



description marked * on the right will be displayed. (current setting)





OFF



OFF



CALL-



°F



°C



OFF



OFF



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 °F is used.(Initial setting value)



The temperature unit °C 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.

12-3. Function selection of IR wireless remote controller

OCH512

TEMPERATURE DISPLAY °C/°F SETTING (Change of temp mode from °F to °C)

1 Press the set button with something sharp at the end. MODEL SELECT blinks. 2 Press the button. “F:” blinks. 3 Press the button. “C:” blinks. 4 Press the set button with something sharp at the end. MODEL SELECT is lighted for 3 seconds, then turned off.

AUTO START



COOL

DRY

AUTO

FAN

HEAT

ON/OFF TEMP

RUN

MODEL SELECT

FAN

SWING

NOT AV AILABLE

START

TEST

CHECK

°F °C

AMPMSTOP

AMPM







MODE

CHECK

TEST RUN

FAN

VANE

LOUVER

RESETSET CLOCK



AUTO STOP

AUTO START



min

OCH512

MONITORING THE OPERATION DAT A BY THE REMOTE CONTROLLER

13-1. HOW TO "MONITOR THE OPERATION DATA"

• Turn on the [Monitoring the operation data]





(3)



Example) Request code "004"

Discharge temperature 156°F Refrigerant address "00"



(7) (5)

(1)

(6)

(4)

(1)Press the (2)Press the

Note) It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while "- - - -" is blinking),

Operating the service inspection monitor

- - - ] appears on the screen (at

[ (The display (at

(3)Press the [TEMP] buttons (

[Screen

(4)Press the [CLOCK] buttons ( and ) to set the desired request code No. (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

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.

button to perform data request.



in the same way as in maintenance mode.)

(2)

A: Mode display B: Refrigerant address C: Data display area D: Request code display area

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.

13-2. REQUEST CODE LIST

OCH512

* 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

Shell temperature (TH32)

Outdoor unit - Liquid pipe 1 temperature (TH3)

Outdoor unit - Liquid pipe 2 temperature

Outdoor unit-2-phase pipe temperature (TH6)

7 8

Outdoor unit-Outside air temperature (TH7)

Outdoor unit-Heatsink temperature (TH8)

10 11

Discharge super heat (SHd)

Sub-cool (SC)

13 14 15

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

23 24

Primary current

DC bus voltage

26 27 28

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)

<Heat mode-4-deg correction> Indoor unit-Intake air temperature (Unit No. 2)

<Heat mode-4-deg correction> Indoor unit-Intake air temperature (Unit No. 3)

<Heat mode-4-deg correction> 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)

40 41

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)

45 46 47

Thermo ON operating time

Test run elapsed time

Description

(Display range)

Refer to 13-2-1. Detail Contents in Request Code. 0 – 50 0 – 9999 0 – 9999 37 ~ 327

-40 ~ 194

-38 ~ 190

-40 ~ 327

0 – 327 0 – 234

0– 255 0– 255 0– 10

0 – 9999

0– 500 0– 500

0– 50 180 – 370

0– 4 62 ~ 86 46 ~ 102 46 ~ 102

46 ~ 102

-38 ~ 190

0 – 999 0– 120

Unit Remarks

– A

10 hours

100 times

°F °F °F °F

°F °F

Hz Hz

Step

rpm

Pulses Pulses

A V

Units

°F °F

°F

°F °F °F °F

Minutes 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.

Request content

OCH512

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)

55 56 57 58 59

Signal transmission demand capacity

Contact demand capacity

External input state (silent mode, etc.)

62 63 64 65 66 67 68 69

Outdoor unit-Capacity setting display

Outdoor unit-Setting information

71 72

Outdoor unit-SW1 setting information

Outdoor unit-SW2 setting information

74 75

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

82 83

M-NET adapter connection (presence/absence)

84 85

86 87 88

Display of execution of replace/wash operation Outdoor unit-Microprocessor version information

Outdoor unit-Microprocessor version information (sub No.)

92 93 94 95 96 97 98 99

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 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code.

Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code.

0 – 255

Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code.

Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code.

Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code. Refer to 13-2-1.Detail Contents in Request Code.

"0000": Not connected "0001": Connected

"0000": Not washed "0001": Washed

Examples) Ver 5.01

"0501" Auxiliary information (displayed after version information) Examples) Ver 5.01 A000

"A000"

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)

Unit Remarks

– – – – – –

% – –

– –

– – – – – – –

–

Ver

–

Code

Request content

OCH512

Request code

Error history 1 (latest)

103

Error history 2 (second to last)

104

Error history 3 (third to last)

105

Abnormal thermistor display

106

(TH3/TH6/TH7/TH8)

Operation mode at time of error

107

Compressor-Operating current at time of error

108

Compressor-Accumulated operating time at time of error

109

Compressor-Number of operation times at time of error

110

Discharge temperature at time of error

111

Outdoor unit - Liquid pipe 1 temperature (TH3) at time of error

112

Outdoor unit - Liquid pipe 2 temperature at time of error

113

Outdoor unit-2-phase pipe temperature (TH6) at time of error

114 115

Outdoor unit-Outside air temperature (TH7) at time of error

116

Outdoor unit-Heatsink temperature (TH8) at time of error

117

Discharge super heat (SHd) at time of error

118

Sub-cool (SC) at time of error

119

Compressor-Operating frequency at time of error

120

Outdoor unit at time of error

121

• Fan output step Outdoor unit at time of error

122

• Fan 1 speed (Only for air conditioners with DC fan) Outdoor unit at time of error

123

• Fan 2 speed (Only for air conditioners with DC fan)

124

LEV (A) opening at time of error

125

LEV (B) opening at time of error

126 127 128 129

Thermo ON time until operation stops due to error

130 131

Indoor - Liquid pipe temperature at time of error

132

Indoor-Cond./Eva. pipe temperature at time of error

133

Indoor at time of error

134

• Intake air temperature <Thermostat judge temperature> 135 136 137 138 139 140

~ 146 147 148 149

Indoor-Actual intake air temperature

150

Indoor - Liquid pipe temperature

151

Indoor-Cond./Eva. pipe temperature

152

Description

(Display range)

Displays error history. (" - - " is displayed if no history is present.) Displays error history. (" - - " is displayed if no history is present.) 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 0 – 9999 37~ 327

-40 ~ 194

-38 ~ 190

-40 ~ 327 0– 327 0– 234 0– 255

0– 10

0 – 9999

0– 500 0– 500

0 – 999

-38 ~ 190

Unit Remarks

Code Code Code

Sensor

number

– A

10 hours

100 times

°F °F °F °F

Step

rpm

Pulses Pulses

Minutes

°F

°F °F °F

"0" is displayed if the air conditioner is a single-

fan type.

Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad). Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).

Request content

OCH512

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-Microprocessor version information

190

Indoor unit-Microprocessor 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 13-2-1 Detail Contents in Request Code. Refer to 13-2-1 Detail Contents in Request Code.

Undefined

Refer to

13-2-1 Detail Contents in Request Code.

Undefined

Examples) Ver 5.01 Auxiliary information (displayed after version information) Examples) Ver 5.01 A000 "A000"

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 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".

"0501"

Unit Remarks

1 hour

10 hours

For indoor fan phase control

–

For indoor fan pulsation control

–

For indoor DC brushless motor control

–

– – – – –

Ver

–

13-2-1. Detail Contents in Request Code

OCH512





[Operation state] (Request code : "0")

Data display

Relay output state Operation mode

Operation mode

Display Operation mode

0STOP • FAN C COOL • DRY HHEAT

d DEFROST

[Indoor unit – Control state] (Request code : "50")





Relay output state

Display

0 1

2 3 4 5 6 7 8 A

Power currently

supplied to compressor

–

ON ON

Example) Request code "004"

A: Mode display B: Refrigerant address C: Data display area D: Request code display area

Compressor Four-way valve Solenoid valve

Discharge temperature 156°F Refrigerant address "00"

–

ON ON ON ON ON

–

Data display

Unit No. 4 state Unit No. 3 state

Unit No. 2 state Unit No. 1 state

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.

[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 Frequency control state

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





Discharge temperature

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

overheat prevention

Condensation temperature

overheat prevention

Anti-freeze

protection control

Heatsink temperature

overheat prevention

[Fan control state] (Request code : "53")

OCH512

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

C d

E F

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  : Detected

Display

0 1 2 3 4 5 6 7 8 9 A b

d E F

Overvoltage Undervoltage L1-phase

error error open error

Power synchronizing

signal error

Error content

Display

Converter Fo

0 1 2 3

 : Detected

error

PAM error

[Contact demand capacity] (Request code : "61")

OCH512

Data display

000

Setting content

[External input state] (Request code : "62")

Data display

000

Input state

Setting content

Setting

Display Setting value

0 1 50% 2 75% ON 3 100%

Input state : Input present

Display

0 1 2 3 4 5 6 7 8 9

Contact demand Silent mode Spare 1 Spare 2

input input input input

SW7-1 SW7-2

[Outdoor unit – Capacity setting display] (Request code : "70")

Data display

912 10 18 11 24 14 30 20 36 25 42

Capacity

[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

0 1 2 3

Single-/ Heat pump/ 3-phase

Single-phase

3-phase

cooling only

Heat pump Cooling only Heat pump

Cooling only

[Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes : 73 to 82

OCH512

0: Switch OFF 1: Switch ON

SW1, SW2, SW6, SW7

123456 000000 0000

100000 0001 010000 0002 1 1 0 0 0 0 00 03 001000 0004 101000 0005 011000 0006 1 1 1 0 0 0 00 07 000100 0008 100100 0009 010100 000A 1 1 0 1 0 0 00 0b 001100 000C 1 0 1 1 0 0 00 0d 011100 000E 111100 000F 000010 0010 100010 010010 110010 001010 101010 011010 111010 000110 100110 010110 110110 00111 0 10111 0 01111 0 11111 0 000001 100001 010001 110001 001001 101001 011001 111001 000101 100101 010101 110101 001101 101101 011101 111101 000011 100011 010011 110011 001011 101011 011011 111011 000111 100111 010111 110111 00111 1 10111 1 01111 1 11111 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: Switch OFF 1: Switch 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 1111 000F

0: Switch OFF 1: Switch ON

SW8

123 000 0000

100 0001 010 0002 110 0003 001 0004 101 0005 011 0006 111 0007

0: Switch OFF 1: Switch ON

SW4, SW9, SW10

12 00 0000

10 0001 01 0002 11 0003

Data display

[Indoor unit – Model setting information] (Request code : 162)

OCH512

Data display

See the table on the right.

Display Model setting state Display Model setting state

00 20 01 21 02 22 03 23 04 24 05 25 06 26 07 27 08 28 09 29 0A 2A 0b 2b 0C 2C 0d 2d 0E 2E 0F 2F 10 30 11 31 12 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

PLA-A·BA

PCA-A·KA

[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 10 42 01 11 02 12 03 13 04 14 05 15 06 12 16 07 17 08 18 09 18 19 0A 1A 0b 24 1b 0C 1C 0d 30 1d 0E 1E 0F 36 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

14 DISASSEMBLY PROCEDURE

OCH512

PUZ-A42NHA5 PUZ-A42NHA5-BS PUY-A42NHA5 PUY-A42NHA5-BS

OPERATING PROCEDURE

1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide

the hook on the right downward to remove the service panel.

(2) Remove screws (3 for front, 3 for rear/5 × 12) 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 × 12) 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, CNF2 on controller

circuit board in electrical parts box.

(6) Remove 4 fan motor fixing screws (5 × 20) to detach the

fan motor. (See Photo 2)

Figure 1

Grille fixing screws

Photo 1

Propeller

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Slide

Front panel

Photo 2

Fan motor fixing screws

Top panel

Service panel

Service panel fixing screws

Fan grille

Fan motor

3. Removing the electrical parts box (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Disconnect the indoor/outdoor connecting wire from

terminal block.

(4) Remove all the following connectors from controller circuit

board; fan motor, linear expansion valve, thermistor <Outdoor pipe>, thermistor <Shell>, thermistor <Outdoor 2-phase pipe>, thermistor <Outdoor>, high pressure switch, 4-way valve coil. Pull out the disconnected wire from the electrical parts box. <Diagram symbol in the connector housing>

• Fan motor (CNF1, CNF2)

• Linear expansion valve (LEV-A)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Shell> (TH32)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• High pressure switch (63H)

• 4-way valve coil (21S4)

(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

Fan motor fixing screws

Controller circuit board (C.B.)

Electrical parts box

Electrical parts box fixing screw

Terminal block (TB1)

Valve bed

Compressor (MC)

Terminal cover

Cover panel (Front)

Cover panel fixing screws

OPERATING PROCEDURE

OCH512

PHOTOS

4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)

(1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Disconnect the connectors, TH6 and TH7 (red), on the controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the electrical parts box. (5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6) from the sensor holder.

Note: In case of replacing thermistor <Outdoor 2-phase pipe> (TH6), replace it together with thermistor <Outdoor> (TH7) since they are combined together. Refer to No.5 below to remove thermistor <Outdoor>.

5. Removing the thermistor <Outdoor> (TH7)

(1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Disconnect the connector TH7 (red) on the controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the electrical parts box. (See Photo 4) (5) Pull out the thermistor <Outdoor> (TH7) from the sensor holder.

Photo 4

Controller circuit board (C.B.)

Photo 5

Electrical parts box

Thermistor <Outdoor 2-phase pipe> (TH6)

Clamp

Note: In case of replacing thermistor <Outdoor> (TH7), replace it together with thermistor <Outdoor 2-phase pipe> (TH6), since they are combined together. Refer to No.4 above to remove thermistor <Outdoor 2-phase pipe>.

6. Removing the thermistor <Outdoor pipe> (TH3) and thermistor <Shell> (TH32)

(1) Remove the service panel. (See Figure 1) (2) Disconnect the connectors, TH3 (white) and TH32 (black), on the controller circuit board in the electrical parts box. (3) Loosen the clamp for the lead wire in the rear of the electrical parts box. (See Photo 4) (4) Pull out the thermistor <Outdoor pipe> (TH3) and thermistor <Shell> (TH32) from the sensor holder.

Lead wire of thermistor <Outdoor> (TH7)

Photo 6

Thermistor <Shell> (TH32)

Sensor holder

Thermistor <Outdoor pipe> (TH3)

Compressor (MC)

OPERATING PROCEDURE

OCH512

7. Removing the 4-way valve coil (21S4), and linear expansion valve coil (LEV-A)

(1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1)

[Removing the 4-way valve coil] (3) Remove 4-way valve coil fixing screw (M4 × 6). (4) Remove the 4-way valve coil by sliding the coil toward you. (5) Disconnect the connector 21S4 (green) on the controller

circuit board in the electrical parts box.

[Removing the linear expansion valve coil] (3) Remove the linear expansion valve coil by sliding the coil upward. (4) Disconnect the connectors, LEV-A (white), on the controller circuit board in the electrical parts box.

PHOTOS

8. Removing the 4-way valve

(1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove 3 valve bed fixing screws (4 × 10), 4 ball valve and stop valve fixing screws (5 × 16), then remove the valve bed. (4) Remove 4 right side panel fixing screw (5 × 12) in the rear of the unit and then remove the right side panel. (5) Remove the 4-way valve coil. (See Photo 7) (6) Recover refrigerant. (7) Remove the welded part of 4-way valve.

Note 1: Recover refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by remov-

ing the right side panel.

Note 3: When installing the 4-way valve, cover it with a

wet cloth to prevent it from heating (250˚F or more),

then braze the pipes so that the inside of pipes

are not oxidized.

9. Removing linear expansion valve

(1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove 3 valve bed fixing screws (4 × 10), 4 ball valve and stop valve fixing screws (5 × 16), then remove the valve bed. (4) Remove 4 right side panel fixing screw (5 × 12) in the rear of the unit and then remove the right side panel. (5) Remove the linear expansion valve. (See Photo 7) (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 remov-

ing the right side panel.

Note 3: When installing the linear expansion valve, cover

it with a wet cloth to prevent it from heating

(250˚F or more), then braze the pipes so that the

inside of pipes are not oxidized.

Photo 7

4-way valve coil fixing screw

4-way way valve coil

Linear expansion valve coil (LEV-A)

4-way valve

Linear expansion valve

OPERATING PROCEDURE

OCH512

PHOTOS

10. Removing the high pressure switch (63H)

(1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3)

(4) Pull out the lead wire of high pressure switch. (5) Recover refrigerant. (6) Remove the welded part of high pressure switch.

Note 1: Recover refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by remov-

Note 3: When installing the high pressure switch, cover it

Remove 3 right side panel fixing screws (5 × 12) in the rear of the unit and remove the right side panel.

ing the right side panel.

with a wet cloth to prevent it from heating (210°F or more), then braze the pipes so that the inside of pipes are not oxidized.

Photo 8

High pressure switch (63H)

11. Removing the reactor (DCL) and capacitor (CE)

(1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove the electrical parts box. (See Photo 3) <Removing the reactor> (4) Remove 4 reactor fixing screws (4 × 10) and remove the

reactor. <Removing the capacitor> (4) Remove 2 capacitor band fixing screws (4 × 10) and

remove the capacitor. w The reactor and capacitor is attached to the rear of the electri-

cal parts box.

Photo 9

Reactor fixing screws

Reactor (DCL)

Capacitor (CE)

Electrical parts box

Reactor fixing screws

Capacitor band fixing screws

OPERATING PROCEDURE

OCH512

PHOTOS

12. 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 × 12) and

remove the front cover panel. (See Photo 3)

(4) Remove 2 back cover panel fixing screws (5 × 12) 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 screw (5 × 12) in the rear

of the unit and then remove the right side panel. (8) Remove 3 separator fixing screws (4 × 10) and remove the

separator. (9) Recover refrigerant. (10) Remove the 3 points of the motor for compressor fixing

nut using spanner or adjustable wrench.

(11) Remove the welded pipe of motor for compressor inlet

and outlet and then remove the compressor.

Note: Recover refrigerant without spreading it in the air.

Photo 10

Valve bed

Separator

Separator fixing screw

Valve bed fixing screws

Accumulator

Compressor (MC)

Compressor fixing nut

13. Removing the accumulator

(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 × 12) and

remove the front cover panel. (See Photo 3) (4) Remove 2 back cover panel fixing screws (5 × 12) 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 screw (5 × 12) in the rear

of the unit and then 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

Compressor (MC)

Inlet

Outlet

Accumulator

Accumulator leg

Accumulator leg fixing screws

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

New publication, effective Apr. 2012 Specifications are subject to change without notice.

Mitsubishi Electric PUZ-A42NHA5-BS, PUZ-A42NHA5, PUY-A42NHA5, PUY-A42NHA5-BS Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual