Mitsubishi Electric PUHZ-SHW80VHA, PUHZ-SHW112VHA, PUHZ-SHW112YHA, PUHZ-SHW140YHA Service Manual

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SERVICE MANUAL

R410A

Outdoor unit [Model names]

PUHZ-SHW80VHA

PUHZ-SHW112VHA

[Service Ref.]

PUHZ-SHW80VHA PUHZ-SHW112VHA

September 2012

No.OCH526

Note:

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

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

PUHZ-SHW112YHA

PUHZ-SHW140YHA

PUHZ-SHW112YHA PUHZ-SHW140YHA

CONTENTS

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

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

3. SPECIFICATIONS ········································7

4. DATA ·····························································9

5. OUTLINES AND DIMENSIONS··················11

6. WIRING DIAGRAM ····································· 12

7. WIRING SPECIFICATIONS ························14

8. REFRIGERANT SYSTEM DIAGRAM ········15

9. TROUBLESHOOTING ································17

10. FUNCTION SETTING ································· 73

11.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

12. EASY MAINTENANCE FUNCTION ···········90

13. DISASSEMBLY PROCEDURE ···················95

····80

PARTS CATALOG (OCB526)

OCH526

REFERENCE MANUAL

INDOOR UNIT SERVICE MANUAL 1-1. FOR AIR TO WATER SYSTEM

Model name Service ref. Service manual No.

EHST20C-VM6HB EHST20C-YM9HB EHST20C-VM6B EHST20C-YM9B EHST20C-VM6EB EHST20C-YM9EB EHST20C-VM6SB EHPT20X-VM2HB EHPT20X-VM6HB EHPT20X-YM9HB EHPT20X-VM6B EHPT20X-YM9B

EHSC-VM6B EHSC-YM9B EHSC-VM6EB EHSC-YM9EB EHPX-VM2B EHPX-VM6B EHPX-YM9B ERSC-VM2B

EHST20C-VM6HB.UK EHST20C-YM9HB.UK EHST20C-VM6B.UK EHST20C-YM9B.UK EHST20C-VM6EB.UK EHST20C-YM9EB.UK EHST20C-VM6SB.UK EHPT20X-VM2HB.UK EHPT20X-VM6HB.UK EHPT20X-YM9HB.UK EHPT20X-VM6B.UK EHPT20X-YM9B.UK

EHSC-VM6B.UK EHSC-YM9B.UK EHSC-VM6EB.UK EHSC-YM9EB.UK EHPX-VM2B.UK EHPX-VM6B.UK EHPX-YM9B.UK ERSC-VM2B.UK

1-2. FOR AIR TO AIR SYSTEM

Model name Service Ref.

PLA-RP71/125BA2 PLA-RP71/125BA2.UK

PLA-RP100BA3 PLA-RP100BA3

PLA-ZRP35/50/60/71/100/125BA PLA-ZRP35/50/60/71/100/125BA

PKA-RP100KAL PKA-RP100KAL.TH

OCH531

OCH532

Service Manual No.

OCH412 OCB412

OCH459 OCB459

OCH529 OCB529

OCH452 OCB452

PKA-RP60/100FAL PKA-RP50FAL2 PKA-RP60/100FAL PKA-RP50FAL2 OC331

PKA-RP50HAL PKA-RP50HAL

PEAD-RP50/60/71/100/125/JA(L) PEAD-RP50/60/71/100/125/JA(L)(R1).UK

PEAD-RP50/60/71/100/125/JA(L)Q PEAD-RP50/60/71/100/125/JA(L)Q.UK BWE10160

OCH453 OCB453

HWE08130 BWE09220 BWE09240

OCH526

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 breaker.

• 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

Cautions for units utilizing refrigerant R410A

Use new refrigerant pipes.

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

· Be sure to perform replacement operation before test run.

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

· Avoid using thin pipes.

Make sure that the inside and outside of refrigerant piping is clean and it has no 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 keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

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

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

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

Use a vacuum pump with a reverse flow check valve.

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

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

The following tools are necessary to use R410A refrigerant.

Tools for R410A Gauge manifold Charge hose

Gas leak detector

Torque wrench

Flare tool Size adjustment gauge Vacuum pump adaptor

Electronic refrigerant charging scale

Handle tools with care.

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

Do not use a charging cylinder.

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

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

Charge refrigerant from liquid phase of gas cylinder.

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

Do not use refrigerant other than R410A.

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

Use 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

OCH526

(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.

Gauge manifold

Charge hose

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

Refrigerant recovery equipment

Tool name

Specifications

· Only for R410A

· Use the existing fitting

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

· Only for R410A

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

· Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon

specifications

—

. (UNF1/2)

[4] Refrigerant leakage detection function

This air conditioner can detect refrigerant leakage which may happen during a long period of use. In order to enable the leakage detection, settings are required to let the unit memorize the initial conditions (initial learning). Refer to 14-3. INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION.

2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES

OCH526

(1) Flowchart

Measure the existing pipe thickness and check for damage.

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

Check if existing air conditioner can operate.

Existing air conditioner can operate.

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

Disconnect existing air conditioner from piping.

Existing pipes can be reused.

Existing air conditioner cannot operate.

Use a refrigerant recovery equipment to recover the refrigerant.

In case existing pipes were used

for gas or oil heat pump system, be sure to clean the pipes.

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

Existing pipes cannot be reused. Use new pipes.

Connect a new air conditioner.

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

Connecting a new air conditioner

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

 When using gas piping of :19.05mm for SHW112, 140. Make sure that DIP SW8-1 on outdoor unit controller board is set to ON.

 This is to keep the pressure on pipes within permissible range.

● Use different diameter joint or adjust the piping size by brazing.  When using pipes larger than specified size for SHW80.

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



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

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

The pipes can be reused.

● Use different diameter joint or adjust the piping size by brazing.

SHW·HA

(2) Cautions for refrigerant piping work

OCH526

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 or below.)

Diagram below: Piping diameter and thickness

Nominal

dimensions(inch)

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

Outside

diameter

6.35

9.52

12.70

15.88

19.05

(mm)

Thickness

R410A R22

0.8

1.0

—

(mm)

0.8

1.0

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 its working pressure is higher than that of other refrigerants. Therefore, to enhance airtightness 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.

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

13.2

16.6

19.7 —

( )

-0.4

9.0

13.0

16.2

19.4

23.3

Flare nut dimensions

(mm)

dimensions(inch)

Nominal

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

Outside

diameter

6.35

9.52

12.70

15.88

19.05

Dimension B

R410A

17.0

22.0

26.0

29.0

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 Refrigerant recovery Refrigerant charge Apply to flared section

Prevent compressor malfunction when charging refrigerant by

spraying liquid refrigerant Prevent gas from blowing out

when detaching charge hose Vacuum drying and air purge

Flaring work of piping

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

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

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

Tool exclusive for R410A Tools for other refrigerants can

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

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

Tool exclusive for R410A

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting flaring dimension)

(mm)

R22

17.0

22.0

24.0

27.0

36.0

Can R407C tools be used?

Ester oil, ether oil: Alkylbenzene oil: minimum amount

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting

flaring dimension)

+36.0mm for indoor unit of RP100, 125 and 140

OCH526

SPECIFICATIONS

<Reference data> Plate heat exchanger (MWA2-38PA)

SHW80 SHW112 SHW140

Nominal water ﬂ ow L/min 22.9 32.1 40.1 Heating

(A7/W35)

Heating (A7/W45)

Heating (A2/W35)

Heating (A2/W45)

Nominal water ﬂ ow L/min 20.4 32.1 35.8 Cooling

(A35/W7)

Cooling (A35/W18)

Capacity kW 8.0 11.2 14.0 COP 4.65 4.46 4.22 Power input kW 1.72 2.51 3.32 Capacity kW 8.0 11.2 14.0 COP 3.42 3.51 3.28 Power input kW 2.34 3.19 4.27 Capacity kW 8.0 11.2 14.0 COP 3.55 3.34 2.96 Power input kW 2.25 3.35 4.73 Capacity kW 8.0 11.2 14.0 COP 2.90 2.78 2.45 Power input kW 2.76 4.03 5.71

Capacity kW 7.1 10.0 12.5 EER 3.31 2.83 2.17 Power input kW 2.14 3.53 5.76 Capacity kW 7.1 10.0 12.5 EER 4.11 4.74 4.26 Power input kW 1.72 2.11 2.93

Rating conditions Nominal operating condition

Heating (A2/W35)

Outside air temperature (Dry-bulb) + 2 °C Outside air temperature (Wet-bulb) + 1 °C Water temperature (inlet/outlet) + 30 °C/+ 35 °C

Heating (A7/W35)

Outside air temperature (Dry-bulb) + 7 °C Outside air temperature (Wet-bulb) + 6 °C Water temperature (inlet/outlet) + 30 °C/+ 35 °C

Heating (A7/W45)

Outside air temperature (Dry-bulb) + 7 °C Outside air temperature (Wet-bulb) + 6 °C Water temperature (inlet/outlet) + 40 °C/+ 45 °C

Heating (A7/W55)

Outside air temperature (Dry-bulb) + 7 °C Outside air temperature (Wet-bulb) + 6 °C Water temperature (inlet/outlet) + 50 °C/+ 55 °C

Heating (A-7/W35)

Outside air temperature (Dry-bulb) - 7 °C Outside air temperature (Wet-bulb) — Water temperature (inlet/outlet) — °C/+ 35 °C

Heating (A-7/W45)

Outside air temperature (Dry-bulb) - 7 °C Outside air temperature (Wet-bulb) — Water temperature (inlet/outlet) — °C/+ 45 °C

Heating (A-7/W55)

Outside air temperature (Dry-bulb) - 7 °C Outside air temperature (Wet-bulb) — Water temperature (inlet/outlet) — °C/+ 55 °C

Heating (A-15/W35)

Outside air temperature (Dry-bulb) - 15 °C Outside air temperature (Wet-bulb) — Water temperature (inlet/outlet) — °C/+ 35 °C

Heating (A-15/W45)

Outside air temperature (Dry-bulb) - 15 °C Outside air temperature (Wet-bulb) — Water temperature (inlet/outlet) — °C/+ 45 °C

Heating (A-15/W55)

Outside air temperature (Dry-bulb) - 15 °C Outside air temperature (Wet-bulb) — Water temperature (inlet/outlet) — °C/+ 55 °C

Cooling (A35/W7)

Outside air temperature (Dry-bulb) + 35 °C Outside air temperature (Wet-bulb) + 24 °C Water temperature (inlet/outlet) + 12 °C/+ 7 °C

Cooling (A35/W18)

Outside air temperature (Dry-bulb) + 35 °C Outside air temperature (Wet-bulb) + 24 °C Water temperature (inlet/outlet) + 23 °C/+ 18 °C

Note: "COP" and "Power input" in the above table are values that does NOT contains the "pump input (based on EN 14511)".

Service Ref.

OCH526

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

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

OUTDOOR UNIT

Noise level Dimensions

Weight Refrigerant

Charge

Oil (Model) Pipe size O.D.

Connection method Between the indoor &

outdoor unit

REFRIGERANT PIPING

/min(CFM

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

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

kg(lbs)

mm(in.) mm(in.)

dB dB

PUHZ-SHW80VHA

PUHZ-SHW112VHA

Single 50Hz, 230V

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

ANB33FJMMT

2.5

Inverter

Discharge thermo, Comp. surface thermo

)

HP switch, LP switch

—

Plate fin coil

Propeller fan % 2

0.074+0.074 100(3,530)

Reverse cycle

51 52

950(37-3/8)

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

1,350(53-1/8)

120(265)

R410A

5.5(12.1)

1.40(FV50S)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 75m

Service Ref.

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

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

OUTDOOR UNIT

Noise level Dimensions

Weight Refrigerant

Charge

Oil (Model) Pipe size O.D.

Connection method Between the indoor &

outdoor unit

REFRIGERANT PIPING

/min(CFM

Cooling Heating

D H

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

kg(lbs)

Liquid

Gas

mm(in.)

mm(in.) Indoor side Outdoor side Height difference Piping length

dB dB

PUHZ-SHW112YHA PUHZ-SHW140YHA

3phase, 50Hz, 400V

Linear Expansion Valve

Discharge thermo, Comp. surface thermo

)

Munsell 3Y 7.8/1.1

Hermetic

ANB33FJLMT

2.5

Inverter

HP switch, LP switch

—

Plate fin coil

Propeller fan % 2

0.074+0.074 100(3,530)

Reverse cycle

51 52

950(37-3/8)

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

1,350(53-1/8)

134(295)

R410A

5.5(12.1)

1.40(FV50S)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 75m

OCH526

DATA

4-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

Service Ref.

PUHZ-SHW80VHA

10m

5.1

20m

5.3

30m

PUHZ-SHW112VHA PUHZ-SHW112YHA

PUHZ-SHW140YHA

5.1

5.3

4-2. COMPRESSOR TECHNICAL DATA

Service Ref.

Compressor model

PUHZ-SHW80VHA PUHZ-SHW112VHA

ANB33FJMMT

Piping length (one way)

40m

5.5

6.1

Additional charge is required for pipes longer than 10m.

(at 20)

PUHZ-SHW112YHA PUHZ-SHW140YHA

ANB33FJLMT

50m

6.7

60m

7.3

75m

7.9

Factory charged

5.5

Winding

Resistance

(  )

U-V

U-W

W-V

0.188

4-3. NOISE CRITERION CURVES

PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA

MODE

COOLING

HEATING

SPL(dB)

51 52

LINE

NC-70

NC-60

NC-50

NC-40

0.302

MICROPHONE

UNIT

1.5m

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

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-30

GROUND

NC-20

4-4. STANDARD OPERATION DATA

OCH526

Representative matching

Mode

Capacity

TotalElectrical circuitRefrigerant circuitIndoor side

Input

Indoor unit

Phase , Hz Voltage Current

Outdoor unit

Phase , Hz Voltage Current Discharge pressure Suction pressure Discharge temperature Condensing temperature Suction temperature Ref. pipe length

Intake air temperature

Discharge air temperature

Intake air temperature

side

Outdoor

SHF

D.B.

W.B.

D.B. D.B.

W.B.

V A

A MPa MPa



PEAD-RP71JA

Cooling

7,100

3.30

PEAD-RP71JA

1.28 1.17 1.68 1.57 2.40 2.29

PUHZ-SHW80VHA

8.09

2.46

0.92 68 42 14

7.5 27 19 15 35 24

0.85

Heating

8,000

2.21

1 , 50

230

1 , 50

230

8.94

2.71

0.76 74 43

7.5 20 15 38

7 6

—

PEAD-RP100JA PEAD-RP125JA

Cooling

10,000

3.26

PEAD-RP100JA PEAD-RP125JA

PUHZ-SHW112VHA PUHZ-SHW112YHA

11.10/3.69

2.61

0.97 68 44 13

7.5 27 19 16 35 24

0.89

Heating

11,200

3.10

1 , 50

230

1/3 , 50

230/400

11.28/3.74

2.22

0.72 65 37

7.5 20 15 35

7 6

—

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

Cooling

12,500

3.89

PUHZ-SHW140YHA

4.92

2.79

0.89 72

7.5 27 19 15 35 24

0.85

Heating

14,000

3.88

1 , 50

230

3 , 50

400

4.91

2.70

0.70 76 44

7.5 20 15 39

7 6

—

OCH526

OUTLINES AND DIMENSIONS

PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA

(19)28 370

2-U Shaped notched holes

(Foundation Bolt M10)

600175 175

Rear Air Intake

Installation Feet

417

330

Unit : mm

930

1,079

Terminal connection

Left ····Power supply wiring

53 56

42 66

2-12 x 36 Oval holes

(Foundation Bolt M10)

Air Discharge

Right··· Indoor/Outdoor wiring

950

Earth terminal

322

Service panel

Handle for moving

635

1350

371

+1 447 +1 443

SHW·VHA

33)

Drain hole

(5-

14514522030 145

SHW·YHA

Front piping cover

Rear piping cover

Bottom piping hole

(Knockout)

81 219

Side Air Intake

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

4 PIPING-WIRING DIRECTIONS

FOUNDATION

Over 150mm

Less than

500

Over

500

Over

Service space

Over 10mm

(Bolts and washers must be

purchased locally.)

shown in the below diagram.

150

Over

FREE

Please secure the unit firmly

with 4 foundation (M10) bolts.

3 FOUNDATION BOLTS

Dimensions of space needed

for service access are

2 SERVICE SPACE

Handle for moving

Side Air Intake

Rear Air Intake

Handle

for

moving

Handle for moving

Power supply wiring hole

(2- 27Knockout)

Rear trunking hole

(Knockout)

Rear piping hole

(Knockout)

Right trunking hole

(Knockout)

27Knockout)

Power supply wiring hole

(2-

Air intake

Right piping hole

(Knockout)

Power supply wiring hole

(2- 27Knockout)

27 55

73 63

19 55

73 63

23 27

73 63

23 27 55

The diagram below shows a

basic example.

Explanation of particular details is

given in the installation manuals etc.

1 FREE SPACE (Around the unit)

Over 10mm

Over 1000mm

···Refrigerant GAS pipe connection (FLARE) 15.88(5/8 inch)

···Refrigerant LIQUID pipe connection (FLARE) 9.52(3/8 inch)

Example of Notes

1 ···Indication of STOPVALVE connection location.

Piping Knockout Hole Details

Front trunking hole

(Knockout)

Front piping hole

(Knockout)

OCH526

WIRING DIAGRAM

PUHZ-SHW80VHA PUHZ-SHW112VHA

SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 MC MF1, MF2 21S4 63H 63L 63HS TH3 TH4 TH6 TH7 TH8 TH32 Thermistor<Suction> TH33 Thermistor<Ref. check> TH34 LEV-A, LEV-B, LEV-C

MF1

MS 3~

MF2

MS 3~

Terminal Block<Power Supply, Indoor/Outdoor Motor for Compressor Fan Motor Solenoid Valve (Four-Way Valve) High Pressure Switch Low Pressure Switch High Pressure Sensor Thermistor<Liquid> Thermistor<Discharge> Thermistor<2-Phase Pipe> Thermistor<Ambient> Thermistor (internal) <Heat Sink>

Thermistor<Comp. Surface> Linear Expansion Valve

63L63H

TRANS

TH33

TH33 (YLW)

CNAC

(WHT)

C. B.

CNS

(WHT)

1 CNDC (PNK)

CNF1

CNF2

TH6TH7 TH4TH3

TH32

t° t° t° t°

t°

141221

TH32

TH7/6

TH3

(BLK)

(RED)

(WHT)

63L

(RED)

63H

(YLW)

CN2

(WHT)

DCL CB CY1, CY2 P. B. Power Circuit Board

U, V, W LI NI P2 N2 DCL1, DCL2 IGBT EI, E2, E3, E4 52C

C. B.

SW1

TH4

(WHT)

Reactor Main Smoothing Capacitor Capacitor

Connection T erminal<U/V/W -Phase> Connection T erminal<L-Phase> Connection T erminal<N-Phase> Connection T erminal Connection T erminal Connection T erminal<Reactor> Power Module Connection T erminal<Ground> 52C Relay Controller Circuit Board Switch<Manual Defrost, Defect History, Record Reset, Refrigerant Address

LEV-A

63HS

(WHT)

21S4

(GRN)

(RED)

TH34

t°

21 TH34

LED2

CN4

(WHT)

21S4

LEV-A (WHT)

LED1

X52

31 31

LEV-B

(RED)

LEV-C

(BLU)

X54

SV1 /CH

(GRY)

114

LEV-C

CNVMNT

CN52C

(RED)

311 5

CNMNT

(WHT)

CNM

(WHT)

X51

(WHT)

*1 *1

SW5SW8SW4SWP

SW6SW1

SW4 SW5

SW6 SW7 SW8 SW9 SWP CN31 CNDM CN51 SV1/CH SS CNM LED1, LED2 F1, F2, F3, F4 X51, X52, X54

SW7

SW9

CN31

1 3

CN3S

(WHT)

1 3

(WHT)

CNDM

CN51

(WHT)

Switch<Test Operation> Switch<Function Switch, Model Select Switch<Model Select> Switch<Function Switch> Switch<Function Switch> Switch<Function Switch> Switch<Pump Down> Connector<Emergency Operation> Connector<Connection for Option> Connector<Connection for Option> Connector<Connection for Option> Connector<Connection for Option> Connector<Connection for Option> LED<Operation Inspection Indicators> Fuse<T6.3AL250V> Relay

When M-NET adapter is connected

ABS

CN5

(WHT)

M-NET ADAPTER

CN2M (WHT)

TB7

M-NET

CND

(WHT)

WHT

RED

CN4

(WHT)

CN2

(WHT)

CNDC

(PNK)

t°

TH8

UVW

RED

BLK

WHT

*3 Ambient temp. of ZUBADAN Flash Injection becomes effective.

The black square ( ) indicates a switch position.

Ambient temp.

3°C or less

(lnitial setting)

0°C or less

SW9-3,4 *4

ON OFF

1234

ON OFF

1234

*4 SW9-1 to 2 : Function Switch

Ambient temp.

–3°C or less

–6°C or less

DCL2

DCL

SW9-3,4 *4

ON OFF

1234

ON OFF

1234

DCL1

IGBT

POWER SUPPLY ~/N 230V 50Hz

CN52C

(RED)

52C

BLK

BLU

YLW

GRN/YLW

RED

L N S1 S2 S3

INDOOR UNIT

ORN

BRN

P. B.

BLK

(RED)

CNAC2

1 3

BLK

RE D

WHT

(WHT)

CNAC1

LINI

M-NET ADAPTER

SYMBOL TB7 CN5 CND CN2M

*1 MODEL SELECT

The black square ( ) indicates a switch position.

MODEL

80V

112V

Terminal Block<M-NET connection> Connector<Transmission> Connector<Power Supply> Connector<M-NET communication>

SW6 SW5-6 *2

ON OFF

12345678

ON OFF

12345678

*2 SW5 -1 to 5 : Function Switch

TB1

CY1 CY2

NAME

ON OFF

123456

PUHZ-SHW112YHA PUHZ-SHW140YHA

OCH526

SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 TB2 MC MF1, MF2 21S4 63H 63L 63HS TH3 TH4 TH6 TH7 TH8 TH32 Thermistor<Suction> TH33 Thermistor<Ref. check> TH34

LEV-A, LEV-B, LEV-C

ACL1, ACL2, ACL3, ACL4 CY1, CY2

MF1

MF2

Terminal Block<Power Supply> Terminal Block<Indoor/Outdoor> Motor for Compressor Fan Motor Solenoid Valve (Four-Way Valve) High Pressure Switch Low Pressure Switch High Pressure Sensor Thermistor<Liquid> Thermistor<Discharge> Thermistor<2-Phase Pipe> Thermistor<Ambient> Thermistor<Heat Sink>

Thermistor<Comp. Surface> Linear Expansion Valve Reactor Capacitor

C. B.

CNF1

(WHT)

CNS

(WHT)

1 CNDC (PNK)

CNF2

(WHT)

MS 3~

TRANS

63L63H

TH33

t°

31 TH33 (YLW)

CNAC (WHT)

CK RS P. B.

N. F.

CONV. B.

TH6TH7

TH32

t°

12 TH32 (BLK)

TH4TH3

t° t° t° t°

141221

TH7/6

TH3

TH4

(RED)

(WHT)

63L

(RED)

63H

(YLW)

CN2

(WHT)

Capacitor Rush Current Protect Resistor

TB-U/V/W TB-L1/L2/L3 TB-N X52CA

LI1, LI2. LI3, NI LO1, LO2, LO3, NO GD1, GD3

N-IN CK-OU

Power Circuit Board Connection Terminal<U/V/W -Phase Connection Terminal Connection Terminal 52C Relay Noise Filter Circuit Board Connection Terminal Connection Terminal Connection Terminal<Ground> Converter Circuit Board Connection Terminal<L1-Power Supply Connection Terminal<L1-Power Supply Connection Terminal<L2-Power Supply Connection Terminal<L3-Power Supply Connection Terminal Connection Terminal

LEV-A

63HS

(WHT)

LED2

21S4

(GRN)

TH34

t°

21 TH34

(RED)

LED1

LEV-A (WHT)

CN4

(WHT)

31 31

X52

21S4

311 5

CNMNT

(WHT)

CNM

X51

<L1/L2/L3-Power Supply

<L1/L2/L3/N-Power Supply <L1/L2/L3/N-Power Supply

LEV-C

LEV-B

CNVMNT

LEV-B (RED)

LEV-C

(BLU

(WHT)

114

(WHT)

)

X54

SV1

/CH

(WHT)

(GRY)

>L1-A1/IN >L1-A2/OU >L2-A2/OU >L3-A2/OU

*1 *1

SW5SW8SW4SWP

> >

SW6SW1

CN31

C. B.

CN3S

CNDM

CN51

Controller Circuit Board

SW1 SW4

SW5 SW6 SW7 SW8 SW9 SWP CN31 CNDM CN51 SV1/CH SS CNM LED1, LED2 F1, F2, F3, F4 X51, X52, X54

SW7

SW9

(WHT)

3 1

(WHT)

3 1

(WHT)

Switch<Manual Defrost, Defect History, Record Reset, Refrigerant Address Switch<Test Operation Switch<Function Switch, Model Select Switch<Model Select Switch<Function Switch Switch<Function Switch Switch<Function Switch Switch<Pump Down Connector<Emergency Operation Connector<Connection for Option Connector<Connection for Option Connector<Connection for Option Connector<Connection for Option Connector<Connection for Option LED<Operation Inspection Indicators FUSE<T6.3AL250V Relay

When M-NET adapter is connected

ABS

CN5

(WHT)

M-NET ADAPTER

CN2M (WHT)

TB7

M-NET

CND

(WHT)

> > >

> > > > > >

P. B.

TB-U

TB-V

RED

WHT

INDOOR

UNIT

TB2

S1 S2 S3

CY1

CY2

YLW

ORN

BRN

N. F.

CNAC1

(WHT)

TB1

POWER SUPPLY 3N~ 400V 50Hz

L2 L3

*3 Ambient temp. of ZUBADAN Flash Injection becomes effective.

The black square( )indicates a switch position.

Ambient temp.

3°C or less

(lnitial setting)

*4 SW9-1 to 2 : Function Switch

SW9-3,4 *4

ON OFF

RED

WHT

1234

BLK

BLU

GRN/YLW

LI1

LI2

LI3

Ambient temp.

0°C or less

GD1

BLK

SW9-3,4 *4

ON OFF

TB-W BLK

1234

TH8

t°

1312

CN7

CN6

(WHT)

BLK

TB-L3

GD3

BLK

Ambient temp.

–3°C or less

1712

CN2

CN5

(WHT)

(RED)

WHT

RED

TB-L1

CNDC (PNK)

RED

X52CA

TB-N

BLK

TB-L2

CN4

(WHT)

RED

CNCT (RED)

BRN

SW9-3,4 *4

ON OFF

1234

CNL

(BLU)

WHT

CNAC2

(RED)

LO1

LO2

LO3

Ambient temp.

–6°C or less

BLK

3 1

RED

WHT

BLK

BLU

L3-OU

CN7

ACL4

BLK

(WHT)

L1-A1

RED

WHT

L3-A2

RED

ON OFF

L2-OU

CONV. B.

L1-IN

SW9-3,4 *4

M-NET ADAPTER

SYMBOL

Terminal Block<M-NET connection>

TB7

Connector<Transmission>

CN5

Connector<Power Supply>

CND

Connector<M-NET communication>

CN2M

WHT

RED

L2-A2

L1-A2

L1-OU

N-IN

CK-OU BLK

BLU

ACL1

ACL2

ACL3

1234

NAME

*1 MODEL SELECT

The black square( )indicates a switch position.

MODEL

112Y

MODEL

140Y

SW6

ON OFF

12345678

SW5-6 *2

ON OFF

123456

SW6

ON OFF

12345678

SW5-6 *2

ON OFF

123456

SW5 -1 to 5 : Function Switch

OCH526

WIRING SPECIFICATIONS

FIELD ELECTRICAL WIRING (power wiring specifications)

Outdoor unit model Outdoor unit power supply Outdoor unit input capacity Main switch (Breaker) *1 32 A 40 A 16 A 32 A

*1. A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).

*2. (SHW80 - 140)

*3. The 10 m wire is attached in the remote controller accessory. *4. The ﬁ gures are NOT always against the ground.

Outdoor unit power supply 3 × Min. 4 3 × Min. 6 5 × Min. 1.5 5 × Min. 4

)

Indoor unit-Outdoor unit *2 3 × 1.5 (Polar) 3 × 1.5 (Polar) 3 × 1.5 (Polar)

Wiring

Indoor unit-Outdoor unit earth *2 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 2.5

Wire No. ×

size (mm

Remote controller-Indoor unit *3 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar) Outdoor unit L-N (single) Outdoor unit L1-N, L2-N, L3-N (3 phase) Indoor unit-Outdoor unit S1-S2 *4 AC 230 V AC 230 V AC 230 V AC 230 V Indoor unit-Outdoor unit S2-S3 *4 DC 24 V DC 24 V DC 24 V DC 24 V

Circuit rating

Remote controller-Indoor unit *4 DC 12 V DC 12 V DC 12 V DC 12 V

Make sure that the current leakage breaker is one compatible with higher harmonics. Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter. The use of an inadequate breaker can cause the incorrect operation of inverter.

Max. 45 m If 2.5 mm² used, Max. 50 m If 2.5 mm² used and S3 separated, Max. 80 m (SHW230) Max. 80 m Total Max. including all indoor/indoor connection is 80 m.

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

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.

*4 AC 230 V AC 230 V AC 230 V AC 230 V

SHW80V SHW112V SHW112, 140Y SHW230Y

~/N (single),

50 Hz, 230 V

~/N (single),

50 Hz, 230 V

3N~ (3 ph 4-wires),

50 Hz, 400 V

3N~ (3 ph 4-wires),

50 Hz, 400 V

Cable length 50m:3×4 (Polar)/

Cable length 80m:3×6 (Polar)

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

Power supply cables and the cables between Interface unit/Flow temp. controller and outdoor unit shall not be lighter than polychloroprene

2. sheathed ﬂ exible cables. (Design 60245 IEC 57

3. Be sure to connect the cables between

)

Interface unit/Flow temp. controller

and outdoor unit directly to the units (no intermediate connections are allowed). Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may cause insufﬁ cient insulation to ground or a poor electrical contact . (If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)

4. Install an earth longer than other cables.

5. Do not construct a system with a power supply that is turned ON and OFF frequently.

Power supply

Outdoor Unit

Isolator

3 poles isolator

Indoor unit (Interface unit / Flow temp. controller)

Warning:

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

Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a ﬁ re or communication failure.

8 REFRIGERANT SYSTEM DIAGRAM

OCH526

PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA

Refrigerant GAS pipe connection (5/8 inch)

Refrigerant LIQUID pipe connection (3/8 inch)

Ball valve

Linear expansion valve B

Stop valve (with service port)

Strainer #50

Charge plug (Low pressure)

Strainer #100

Solenoid valve (Four-way valve)

Strainer #100

Power receiver

Linear expansion valve C

Charge plug (High pressure)

Muffler

Low pressure switch 63L

Strainer #100

High pressure sensor (63HS)

High pressure switch 63H

Thermistor TH32 (Suction)

Thermistor TH4 (Discharge)

Thermistor TH34 (Comp. surface)

Linear expansion valve A

Compressor

Injection port

Heat interchange circuit

Heat exchanger

Strainer #100

Thermistor TH7 (Ambient)

Thermistor TH6 (2-phase pipe)

Thermistor TH3 (Liquid)

Distributor

Thermistor TH33 (Ref. check)

Refrigerant flow in cooling Refrigerant flow in heating

Symbol Part name Detail COMP Compressor DC inverter scroll compressor (Mitsubishi Electric Corporation) H/P SW High pressure switch (63H) For protection (OFF: 4.15MPa) L/P SW Low pressure switch (63L) For protection (OFF: -0.03MPa) REV/V Reversing (4-way) valve (21S4) Change the refrigerant circuit (Heating / Cooling) and for Defrosting Charge plug Charge plug High pressure / Low pressure / For production test use P-Sensor Pressure sensor (63HS) For calculation of the condensing temperature from high pressure LEV-A Linear expansion valve -A Heating:Secondary LEV Cooling:Primary LEV LEV-B Linear expansion valve -B Heating:Primary LEV Cooling:Secondary LEV LEV-C Linear expansion valve -C For HIC (heating only) TH32 Suction temperature thermistor For LEV control

TH33

Refrigerant leakage detection (Ref. check) thermistor

For refrigerant leakage detection

TH3 Liquid temperature thermistor Heating:Evaporating temperature Cooling:Sub cool liquid temperature TH4 Discharge temperature thermistor For LEV control and for compressor protection TH6

2-phase pipe temperature thermistor

Outdoor 2-phase pipe temperature TH7 Ambient temperature thermistor For fan control and for compressor frequency control TH34 Comp. surface temperature thermistor For protection Power Receiver

Power Receiver For accumulation of refrigerant HIC Heat interchange circuit For high heating capacity Plate HEX Plate Heat Exchanger MWA2-38PA (MITSUBISHI)

TH1 TH2

Outlet water temperature thermistor For ﬂ ow temp. controller

Liquid pipe temperature thermistor For ﬂ ow temp. controller

<Reference> System example

8-1. Refrigerant collecting (pump down)

OCH526

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 “CEN-

TRALLY 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.

* In the case of multi-units control, before powering on, disconnect the wiring between the master indoor unit and the slave

indoor unit. For more details refer to the installation manual for the indoor unit.

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

(outdoor unit) and 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 the SWP switch (push-button type) to ON if the unit is stopped. However, even if the unit is stopped and the

SWP switch is set to ON less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be performed. Wait until compressor has been stopped for 3 minutes and then set the SWP switch to ON again.

3 Because the unit automatically stops in about 2 to 3 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 3 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. When performing the pump-down operation, make sure that the low pressure is lowered to near 0 MPa (gauge).

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

8-2. Unit replacement operation

When reusing the existing pipes that carried R22 refrigerant for the SW75/100/120 models, replacement operation must be performed before performing a test run.

1 If new pipes are used, these procedures are not necessary. 2 If existing pipes that carried R22 refrigerant are used for the SW75/100/120 models, these procedures are not necessary.

(The replacement operation cannot be performed.) 3 During replacement operation, “C5” is displayed on “A-Control Service Tool (PAC-SK52ST)”. (This is applied to only

SW75/100/120 models.)

8-3. 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

no problem with product because the linear expansion pipe is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor

starts operating, but this is no problem with product because the check valve itself, generates the sound because pressure difference is small in the refrigerant circuit.

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

<SW4>



ON OFF



 Stop  Operation  Cooling  Heating

9 TROUBLESHOOTING

OCH526

9-1. 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 “9-4. Self-diagnosis action table”.

Conduct troubleshooting and ascertain the cause of the trouble according to “9-5. Troubleshooting by inferior phenomena”.

Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise and etc. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the

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

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

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

according to “9-5. Troubleshooting

by inferior

9-2. 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

leakage, loosened connections and incorrect polarity.

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

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 power failure automatic recovery, make proper changes of

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

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

"TEST RUN" and the currently selected

OCH526

operation mode are displayed alternately.

Displays the remaining test run time.





[TEST] button



Pipe (liquid) temperature

Operating procedures

1. Turn on the main power supply.

2. Press TEST button twice.

3. Press OPERATION SWITCH button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for correct running.

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

7. Register the contact number.







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

The TEST RUN appears on the screen. Cooling mode:

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

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

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

Check if cool air blows and water is drained.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.

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

• Check that all the indoor units are running properly in case of simultaneous twin operation. Malfunctions may not be displayed regardless of incorrect wiring. w1 After turning on the power supply, the system will go into startup mode, “PLEASE WAIT” will blink on the display section

of the room temperature, and lamp (green) of the remote controller will flash. As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the address is not 0. LED3 will blink. As to OUTDOOR BOARD LED, LED1 (green) and LED2 (red) will be lit up. (After the startup mode of the system finishes, LED2 (red) will be turned off.)

In case OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations 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

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

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

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

cannot be operated.

OUTDOOR BOARD LED Display

< > indicates digital display.

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

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

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

alternately. <F3, F5, F9> After “startup” is displayed,

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

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

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

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

• Outdoor unit’s protection device connector is open.

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

• Remote controller transmission wire is short.

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

• Remote controller transmission wire is open.

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

system startup. (Normal)

Cause

1, L2, L3 and

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

LCD

Abnormality of room temperature thermistor

Abnormality of pipe temperature thermistor/Liquid

Abnormality of drain sensor/ Float switch connector open

Drain overflow protection is operating.

Freezing/overheating protection is operating.

Abnormality of pipe temperature

Abnormality of pipe temperature thermistor/Cond./Eva

Abnormality of indoor controller board

Contents of inferior phenomena

LCD

Malfunction outdoor unit

U1~UP

Malfunction

F3~F9 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

outdoor unit

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

(microprocessor power supply)

LED1

(remote controller)

LED2

(indoor/outdoor communication)

LED3

Lights when power is supplied.

when power is supplied for wired remote controller.

Lights The indoor unit should be connected to the outdoor unit with address “0” setting.

Flashes when indoor and outdoor unit are communicating.



OCH526

,



ON/OFF

MODE

CHECK

TEST RUN

SET

TEST RUN

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

min





Test run [for wireless remote controller]

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

1 Turn on the main power to the unit. 2 Press the

(Start this operation from the status of remote controller display

turned off.)

TEST RUN

A 3 Press the

check whether cool air is blown out from the unit.

4 Press the

check whether warm air is blown out from the unit.

5 Press the

from the unit.

6 Press the

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

button twice continuously.

and current operation mode are displayed.

MODE

( ) button to activate

MODE

( ) button to activate

FAN

button and check whether strong air is blown out

VANE

button and check whether the auto vane operates

COOL

HEAT

mode, then

9-3. HOW TO PROCEED “SELF-DIAGNOSIS”

OCH526

9-3-1. When a Problem Occurs During Operation

If a problem occurs in the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display.  [CHECK] and the refrigerant address are displayed on the

temperature display, and the error code and unit number are displayed alternately as shown below. (If the outdoor unit is malfunctioning, the unit number will be “00”.)

 In the case of group control, for which one remote controller controls

multiple refrigerant systems, the refrigerant address and error code of the unit that first experienced trouble (i.e., the unit that transmitted the error code) will be displayed.

 To clear the error code, press the button.

ON/OFF















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.

9-3-2. Self-Diagnosis During Maintenance or Service

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



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



Switch to self-diagnosis mode.



Press the will change as shown below.

CHECK

button twice within 3 seconds. The display content

Unit number or refrigerant address to be diagnosed

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



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

(Alternating Display)

Error code (2 or 4 digits)



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



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



OCH526

Press the address or refrigerant address will blink.



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



Press the



Press the

ON/OFF

CHECK

ON/OFF

button twice within 3 seconds. The self-diagnosis

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

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

start of self-diagnosis.

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

9-3-3. 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 change as shown below.

CHECK

button for 5 seconds or more. The display content will



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

CHECK

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

9-3-4. Malfunction-diagnosis method by wireless remote controller

OCH526

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.

OCH526

[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.

[Output pattern B]

Beeper sounds OPERATION

INDICATOR lamp blink pattern

Beep Beep Beep Beep Beep

1st2nd3

Off

Self-check starts. (Start signal received)

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

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

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

(Number of times)

1P1 2

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

3E6,E7

Intake sensor error

Indoor/outdoor unit communication error

4 P4 Drain sensor error/Float switch connector open 5

P5 Drain pump error

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

10 11

– –

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

–

E0, E3

Remote controller transmission error

– E1, E2 Remote controller control board error

1st2

Off

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

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

Off

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

Symptom Remark

· · · Repeated

Beep Beep

1st2

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

· · · Repeated

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

[Output pattern B]

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

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

Wired remote controller

Symptom Remark

(Number of times)

1 2

3 4 5 Abnormal high discharging temperature/insufficient refrigerant

6 7

8 9

10 11

12 13 14

E9 UP

U3,U4 UF U2

U1,Ud U5

U8 U6 U7

U9,UH

– –

Others

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

the OPERATION INDICATOR lamp does not come on,

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

Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked)

Abnormal high pressure (63H operated)/Overheating protection operation

Abnormal temperature of heatsink

Outdoor unit fan protection stop

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

abnormal synchronous signal to main circuit/Current sensor error

– –

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

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

there are no error records.

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

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

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

9-4. SELF-DIAGNOSIS ACTION TABLE

OCH526

Error Code

None —

Abnormal point and detection method

No voltage is supplied to terminal

block (TB1) of outdoor unit.

a) Power supply breaker is b) Contact failure or

c) Open phase (L or N phase)

2 Electric power is not charged

to power supply terminal of outdoor power circuit board.

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

3 Electric power is not supplied

to outdoor controller circuit board.

a) Disconnection of connector

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

Case

turned off. disconnection of power

supply terminal

supply terminal power circuit board

(CNDC)

Judgment and action

1 Check following items.

a) Power supply breaker b) Connection of power supply terminal block (TB1) c) Connection of power supply terminal block (TB1)

2 Check following items.

a) Connection of power supply terminal block (TB1) b) Connection of terminal on outdoor power

circuit board

Check connection of the connector LI or NI. Refer to 9-9.

3 Check connection of the connector (CNDC)

on the outdoor controller circuit board.

Check connection of the connector, CNDC on

the outdoor power circuit board(V)/the noise filter(Y). Refer to 9-9.

(5202)

63L connector open

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

4 Disconnection of reactor (DCL

or ACL)

5 Disconnection of outdoor noise

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

6 Defective outdoor power circuit

board

7 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of 63L connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63L

3 63L is working due to

refrigerant leakage or defective parts.

4 Defective outdoor controller

circuit board

4 Check connection of reactor. (DCL or ACL)

Refer to 9-9.

5 a) Check connection of outdoor noise filter

circuit board.

b) Replace outdoor noise filter circuit board.

Refer to 9-9.

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

are checked but the units can not be repaired).

1 Check connection of 63L connector on

outdoor controller circuit board.

Refer to 9-9.

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

Charge additional refrigerant. Check continuity by tester. Replace the parts if the parts are defective. 4 Replace outdoor controller circuit board.

(5201)

63H connector open

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

1 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63H

3 63H is working due to defective

parts.

4 Defective outdoor controller

circuit board

1 Check connection of 63H connector on

outdoor controller circuit board.

Refer to 9-9.

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

OCH526

(4119)

Abnormal point and detection method Judgment and action

2 connector open

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

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

1 Disconnection or contact failure

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

2 Disconnection or contact failure

of 63H, 63L

3 63H and 63L are working due

to defective parts.

4 Defective outdoor controller

board.

Case

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

outdoor controller circuit board. Refer to 9-9. 2 Check the 63H and 63L side of connecting

wire. 3 Check continuity by tester. Replace the parts if the parts are defective. 4 Replace outdoor controller circuit board.

(6844)

(6845)

Indoor/outdoor unit connector miswiring, excessive number of units (4 units or more)

1. Outdoor controller circuit board can automatically check the number of connected indoor units. Abnormal if the number cannot be checked automatically due to 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 the number of connected indoor units as “4 units or more”.

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

1 Contact failure or miswiring of

indoor/outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

3 4 or more indoor units are

connected to one 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.

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 Check disconnection or looseness or polarity

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

2 Check diameter and length of indoor/outdoor

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

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

cable is S1, S2, S3. 3 Check the number of indoor units that are

connected to one outdoor unit. (If EA is

detected) 4~6 Turn the power off once, and on again to

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

Check if refrigerant addresses (SW1-3 to

SW1-6 on outdoor controller circuit board) are

overlapping in case of group control system. 8 Check transmission path, and remove the

cause. * The descriptions above, 1-8, are for EA, Eb

and EC.

(6846)

Start-up time over

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

1 Contact failure of indoor/

outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

7 2 or more outdoor units have

refrigerant address “0” . (In case of group control) 8 Noise has entered into power

supply or indoor/outdoor unit

connecting wire.

OCH526

Error Code

(1302)

Abnormal point and detection method Judgment and action

High pressure (High-pressure switch 63H operated)

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

63H: High-pressure switch

Case

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

dirt of indoor fan

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

valve (Not full open)

8 Clogged or broken pipe 9 Locked outdoor fan motor

0 Malfunction of outdoor fan

motor

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

defective inspection of outside temperature thermistor

(It detects lower temperature

than actual temperature.)

4 Disconnection or contact failure

of connector (63H) on outdoor controller board

5 Disconnection or contact failure

of 63H connection

6 Defective outdoor controller

board

7 Defective action of linear

expansion valve

8 Malfunction of fan driving circuit

1~6 Check indoor unit and repair defect.

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

9~2 Check outdoor unit and repair defect.

3 Check the detected temperature of outside

temperature thermistor on LED display. (SW2 on A-Control Service Tool : Refer to 9-10.)

4~6 Turn the power off and check F5 is

displayed when the power is turned again.

When F5 is displayed, refer to “Judgment

and action” for F5.

7 Check linear expansion valve. Refer to 9-6. 8 Replace outdoor controller board.

(1102)

(5104)

High discharging temperature

(1) Abnormal if discharge temperature

thermistor (TH4) exceeds 125: or 110: continuously for 5 minutes.

Abnormal if discharge temperature

thermistor (TH4) exceeds 110: or more continuously for 30 seconds after 90 seconds have passed since the defrosting operation started.

(2) Abnormal if discharge superheat (Cooling: TH4 – T63HS / Heating: TH4 –

T63HS)

exceeds 70: continuously for 10

minutes.

High comp. surface temperature

Abnormal if comp. surface temperature (TH34) exceeds 125:. In the case of high comp. surface temperature error, compressor does not restart unless the thermistor (TH34) becomes less than 95:.

Open/short circuit of outdoor unit temperature thermistor (TH4, TH34)

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

1 Overheated compressor

operation caused by shortage of refrigerant

2 Defective operation of stop

valve

3 Defective thermistor 4 Defective outdoor controller

board

5 Defective action of linear

expansion valve

6 Clogging with foreign objects in

refrigerant circuit

* Clogging occur in the parts

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

7 In the case of the unit does not

restart: Detection temp. of thermistor (TH34) ] 95:

1 Disconnection or contact failure

of connector (TH4, TH34) on the outdoor controller circuit board

2 Defective thermistor

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 displayed when the power is turned on again.

When U3 is displayed, refer to “Judgement

and action” for U3. 5 Check linear expansion valve. Refer to 9-6. 6 After recovering refrigerant, remove water

from entire refrigerant circuit under vacuum more than 1 hour.

1 Check connection of connector (TH4, TH34)

on the outdoor controller circuit board. Check breaking of the lead wire for thermistor (TH4, TH34). Refer to 9-9. 2 Check resistance value of thermistor (TH4,

TH34) or temperature by microprocessor. (Thermistor/TH4, TH34: Refer to 9-6.)

(SW2 on A-Control Service Tool: Refer to 9-10.) 3 Replace outdoor controller board.

Error Code

OCH526

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

(TH32:5105) (TH33:5105)

Abnormal point and detection method

Open/short of outdoor unit thermistors (TH3, TH32, TH33, TH6, TH7, and TH8)

Abnormal if open or short is detected during compressor operation. Open detection of thermistors TH3, TH32, TH33 and TH6 is inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting. * Check which unit has abnormality in

its thermistor by switching the mode of SW2. (PAC-SK52ST) (Refer to 9-10.) Heatsink thermistor(TH8) is in the power module.

Symbol Name

TH3,TH32,TH33 Thermistor <Liquid>, <Suction>, <Ref. check> - 40 °C or below 90 °C or above

TH6 Thermistor <2-phase pipe> - 40 °C or below 90 °C or above TH7 Thermistor <Ambient> - 40 °C or below 90 °C or above TH8 Thermistor <Heatsink> SHW112, 140YHA - 27 °C or below 102 °C or above TH8 Internal thermistor SHW80, 112VHA - 35 °C or below 170 °C or above

1 Disconnection or contact failure

of connectors Outdoor controller circuit board TH3, TH32, TH33, TH7/6

Outdoor power circuit board

()

CN3

2 Defective thermistor

3 Defective outdoor controller

circuit board

Thermistors

Case

Check connection of connector (TH3, TH32, TH33,

TH7/6) 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, TH32, TH33, TH6,TH7,TH8). Refer to 9-9.

2 Check resistance value of thermistor (TH3,

TH32, TH33, TH6,TH7,TH8) or check temperature by microprocessor. (Thermistor/TH3,TH6,TH7,TH8: Refer to 9-6.) (SW2 on A-Control Service Tool: Refer to 9-10.)

3 Replace outdoor controller circuit board.

* Emergency operation is available in case

Judgment and action

of abnormalities of TH3, TH32, TH33, TH6 and TH7. Refer to 9-8.

Open detection Short detection

(4230)

(4250)

(1520)

Temperature of heatsink

Abnormal if heatsink thermistor (TH8) detects temperature indicated below. SHW80V ·········································95: SHW112V ·········································95: SHW112Y ·········································84: SHW140Y ·········································84:

Power module

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

Too low superheat due to low discharge temperature

Abnormal if discharge superheat is continuously detected less than or equal to -15: for 3 minutes even though linear expansion valve has minimum open pulse after compressor starts operating for 10 minutes.

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

Failure of outdoor fan drive circuit

1 Outdoor stop valve is closed. 2 Decrease of power supply voltage

Looseness, disconnection or converse

of compressor wiring connection

4 Defective compressor 5

Defective outdoor power circuit board

1 Disconnection or loose

connection of discharge temperature thermistor (TH4)

2 Defective holder of discharge

temperature thermistor

3 Disconnection or loose connection

of linear expansion valve’s coil

Disconnection or loose connection of linear expansion valve’s connector

5 Defective linear expansion valve

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

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

5 Check resistance value of thermistor (TH8)

or temperature by microprocessor.

(Thermistor/TH8: Refer to 9-6.)

(SW2 on A-Control Service Tool: Refer to 9-10.)

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

1 Open stop valve. 2 Check facility of power supply. 3

Correct the wiring (U•V•W phase) to compressor.

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

4 Check compressor referring to 9-6. 5 Replace outdoor power circuit board.

12 Check the installation conditions of

discharge temperature thermistor (TH4).

3 Check the coil of linear expansion valve. Refer to 9-7. 4 Check the connection or contact of LEV-A and

LEV-B on outdoor controller circuit board.

5 Check linear expansion valve. Refer to 9-6.

(4400)

Outdoor fan motor

Abnormal if rotational frequency of the 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: or more outside air temperature.

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

1 Failure in the operation of the 2 Failure in the outdoor circuit

DC fan motor controller board

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.)

Error Code

OCH526

(4220)

Abnormal point and detection method

Detailed

codes

To find out the details about U9 error, turn ON SW2-1, 2-2, 2-3, 2-4, 2-5 and 2-6 when U9 error occurs. To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Refer to 9-10.

Overvoltage error

• Increase in DC bus voltage to

SHW80, 112VHA: 400V SHW112, 140YHA: 760V

Undervoltage error

• Instantaneous decrease in DC bus voltage to SHW80, 112VHA: 200V SHW112, 140YHA: 350V

Case

1 Abnormal increase in power source

voltage

2 Disconnection of compressor wiring

3 Defective outdoor power circuit

board

4 Compressor has a ground fault. 1 Decrease in power source voltage,

instantaneous stop.

2 Disconnection or loose connection

of CN52C on the outdoor power circuit board/controller circuit board (SHW·VHA)

3 Defective converter drive circuit

in outdoor power circuit board (SHW·VHA)

4 Defective 52C drive circuit in outdoor

power circuit board

5 Defective outdoor converter circuit

board (SHW·YHA)

6 Disconnection or loose connection

of rush current protect resistor RS (SHW·YHA)

7 Defective rush current protect

resistor RS (SHW·YHA)

8 Disconnection or loose connection

of main smoothing capacitor CB (SHW·VHA)

9 Disconnection or loose connection

of CN2 on the outdoor power circuit board /controller circuit board (SHW·VHA)

0 Power circuit failure on DC supply

for 18V DC output on outdoor controller circuit board (SHW·VHA)

Judgment and action

1 Check the field facility for the power

supply.

2 Correct the wiring (U.V.W phase) to

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

3 Replace outdoor power circuit board. 4 Check compressor for electrical insula-

tion. Replace compressor.

1 Check the field facility for the power

supply.

2 Check CN52C wiring. (SHW·VHA)

3 Replace outdoor power circuit board.

(SHW·VHA)

4 Replace outdoor power circuit board. 5 Replace outdoor converter circuit

board. (SHW·YHA)

6 Check RS wiring. (SHW·YHA)

7 Replace RS. (SHW·YHA) 8 Check CB wiring. (SHW·VHA)

9 Check CN2 wiring. (SHW·VHA)

0 Replace outdoor controller circuit board.

(SHW·VHA)

Input current sensor error/ L1-phase open error

• Decrease in input current through outdoor unit to 0.1A only if operation frequency is more than or equal to 40Hz or compressor current is more

than or equal to 6A.

Abnormal power synchronous signal

• No input of power synchronous signal to power circuit board

• Power synchronous signal of 44 Hz or less, or 65 Hz or more is detected on power circuit board.

1 L1-phase open (SHW·YHA) 2 Disconnection or loose connection

between TB1 and outdoor noise filter circuit board (SHW·YHA)

3 Disconnection or loose connection

of CN5 on the outdoor power circuit board/CNCT on the outdoor noise filter board

4 Defective ACCT(AC current trans)

on the outdoor noise filter circuit board (SHW·YHA)

5 Defective input current detection

circuit in outdoor power circuit board

6 Defective outdoor controller circuit

board

1 Distortion of power source voltage,

noise superimposition.

2 Disconnection or loose connection

of earth wiring

3 Disconnection or loose connection

of CN2 on the outdoor power circuit board /controller circuit board

Defective power synchronous signal

circuit in outdoor controller circuit board

5 Defective power synchronous signal

circuit in outdoor power circuit board

1 Check the field facility for the power

supply. (SHW·YHA)

2 Check the wiring between TB1 and

outdoor noise filter circuit board. (SHW·YHA)

3 Check CN5/CNCT wiring. (SHW·YHA)

4 Replace outdoor noise filter circuit

board. (SHW·YHA)

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

1 Check the field facility for the power

supply.

2 Check earth wiring. 3 Check CN2 wiring.

4 Replace outdoor controller circuit board. 5 Replace outdoor power circuit board.

Continue to the next page.

From the previous page.

OCH526

Error Code

(4220)

(1504)

Abnormal point and detection method

Detailed

codes

Overheat protection

Abnormal if outdoor pipe thermistor (TH3), condensing temperature T 70: or more during compressor operation.

PFC error (Overvoltage/ Undervoltage/Overcurrent)

• PFC detected any of the followings

a) Increase of DC bus voltage

to 420V.

b) Decrease in PFC control

voltage to 12V DC or lower

c) Increase in input current to

50A peak (For models equipped with single-phase PFC only)

PFC/IGBT error (Undervoltage)

When Compressor is running,

• DC bus voltage stays at 310V or lower for consecutive 10 seconds

(SHW80, 112VHA only)

63HS detects

Case

Not applicable for SHW80, 112VHA and SHW112, 140YHA models.

1 Incorrect switch settings on the

outdoor controller circuit board for model select

2 Defective outdoor power circuit

board

3 Defective outdoor controller

circuit board

Defective outdoor fan (fan

motor) or short cycle of outdoor unit during cooling operation

2 Defective outdoor pipe

thermistor (TH3), condensing temperature T

Defective outdoor controller board

63HS

Judgment and action

Check for the switch settings for Model Select on the outdoor controller circuit board.

1 Correction of a model select

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

1 Check outdoor unit air passage.

23 Turn the power off and on again to check

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

(1302)

(4100)

(5300)

Abnormal pressure of pressure sensor (63HS)

Abnormal if pressure sensor (63HS) detects 0.1 MPa or less. Detection is inoperative for 3 minutes after compressor starting and 3 minutes after and during defrosting.

Compressor overcurrent interruption (When compressor locked)

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

Current sensor error or input current error

• Abnormal if current sensor detects –1.0A to 1.0A during compressor operation. (This error is ignored in case of test run mode.)

• Abnormal if 40A (SHW80,112V) of input current is detected or 37A (SHW80,112V) or more of input current is detected for 10 seconds continuously.

1 Disconnection or contact

failure of connector (63HS) on the outdoor controller circuit board

2 Defective pressure sensor

3 Defective outdoor controller

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

1 Disconnection of compressor

wiring

2 Defective circuit of current

sensor on outdoor power circuit board

3 Decrease of power supply

voltage

1 Check connection of connector (63HS) on

the outdoor controller circuit board.

Check breaking of the lead wire for

thermistor (63HS).

2 Check pressure by microprocessor.

(Pressure sensor/ 63HS) (SW2: Refer to 9-10.)

3 Replace outdoor controller board.

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

3 Correct the wiring (U•V•W phase) to

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

5 Replace outdoor power circuit board.

1 Correct the wiring (U•V•W phase) to

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

2 Replace outdoor power circuit board.

3 Check the facility of power supply.

(1300)

Low pressure (63L operated)

Abnormal if 63L is operated (under

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

1 Stop valve of outdoor unit is

closed during operation.

2 Disconnection or loose

connection of connector (63L) on outdoor controller board

3 Disconnection or loose

connection of 63L

4 Defective outdoor controller

board

5 Leakage or shortage of

refrigerant

6 Malfunction of linear expansion

valve

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

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

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

Refer to 9-6.

Error Code

OCH526

(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.

Case

1 Stop valve of outdoor unit is

closed.

2 Decrease of power supply

voltage

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

outdoor controller board

7 Defective compressor 8 Defective outdoor power circuit

board

9 Dip switch setting difference of

outdoor controller circuit board

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 9-9 (Outdoor power circuit board).

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

* 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.

7 Check compressor. Refer to 9-6. 8 Replace outdoor power circuit board. 9 Check the dip switch setting of outdoor

controller circuit board.

E0 E4

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

1 Abnormal if main or sub remote

controller 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 any signal for 2 minutes.

(Error code: E0) 1 Abnormal if indoor controller board can

not receive normally any data 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)

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)

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.

1 Defective remote controller

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 (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 it is not the above-mentioned problem of

1~3 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 "RCE3" or "ERC00-66" is displayed,

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.

1 Replace remote controller.

Error Code

OCH526

Abnormal point and detection method

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

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

Case

1 2 remote controller are set as

“main.”

(In case of 2 remote controllers)

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

transmission wire of remote controller.

Judgment and action

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

controllers 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.

When “RC E3” or “ERC 00-66” is displayed, noise may be causing abnormality.

(6840)

(6841)

(6607

6608)

(0403)

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

Abnormal if outdoor controller circuit board could not receive anything normally for 3 minutes.

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

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

Abnormal if serial co

between outdoor controller circuit board and outdoor power circuit board is d

efective.

mmunication

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 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 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 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.

2 Abnormal if communication between

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

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.

Check disconnection, looseness, or breaking of connection wire between outdoor controller circuit board (CNMNT) and M-NET board (CN5).

Check disconnection, looseness, or breaking of connection wire between outdoor controller circuit board (CNMNT) and M-NET board (CND).

3 Check M-NET transmission wiring method.

Error Code

OCH526

Abnormal point and detection method Judgment and action

Freezing/overheating protection is working

Overheating protection <Heating mode>

Abnormal if condensing temperature of pressure sensor (63HS) detects Tcond. : or more and compressor operation frequency is less than or equal to 25 Hz. Detection is inoperative during defrosting.

1 Overcharge of refrigerant 2 Defective refrigerant circuit

(clogs)

Malfunction of linear expansion valve

4 Reduced water flow

· Clogged filter

· Leakage of water

5 High temperature

Case

12 Check operating condition of refrigerant

circuit.

3 Check linear expansion valve. 45 Check water piping.

· Over-load

· Inlet water is too warm.

6 Defective water pump

6 Check water pump.

w 4~6 is in the case that the unit

is used as Air to water.

Tcond

stage-f

stage-g

-18 -17 -15 -14 -12 -11 -9 -8 -6 -5 -3 -2

stage-e

stage-a stage-b stage-c stage-d stage-e stage-f stage-g

Tcond

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.

It takes at least 9 minutes to detect.

Note 1) Note 2) Abnormality P8 is not detected in

drying mode.

Cooling range : Indoor pipe temperature

(TH2 or TH5) – room temperature (TH1) [ -3 :

TH: Lower temperature between liquid pipe

temperature and condenser/evaporator temperature

<Heating mode> When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished, the unit is detected as abnormal when condenser/ evaporator pipe temperature is not in heating range within 20 minutes.

Note 3) It takes at least 27 minutes to

detect abnormality.

Note 4) It excludes the period of defrosting

(Detection restarts when defrosting mode is over)

Heating range : 3 : [ (Condenser/

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

stage-b

stage-c

stage-d

Ambient temperature ( TH7)

63 62 61 60 59 57 51

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/

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.

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

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

plural units connection)

4 Defective detection of indoor

room temperature and pipe <condenser / evaporator> temperature thermistor

Temperature display of indoor liquid pipe Indoor 2

123456

5 Stop valve is not opened

completely.

A-Control Service Tool SW2 setting

23 Check converse connection of extension

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

[ ]

stage-a

Temperature display of indoor condenser/ evaporator pipe Indoor 1

ON OFF

123456

Temperature display of indoor condenser/ evaporator pipe Indoor 2

123456

)

ON OFF

<M-NET communication error>

OCH526

Error Code Abnormal point and detection method Case Judgment and action

(6600)

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.

1 There are 2 or more same

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

2 Noise has entered into

transmission signal and signal was transformed.

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

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.

(6602)

(6603)

Hard ware error of transmission processor

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

at remote controller indicate the controller that detected abnormality.

BUS BUSY

Overtime error by signal collision damage

Abnormal if transmitting signal is not

possible for 8-10 minutes continuously because of collision of transmission.

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

Note) The address and attribute displayed

at remote controller indicate the controller that detected abnormality.

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 collides each other.

Defective transmitting receiving circuit of transmission processor

3 Transmission data is changed

by the noise on transmission.

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

3 Transmission are mixed with

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

1 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) is not connected.

4 Check transmission waveform or noise on

transmission wire.

(6606)

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.

1 Data of transmission processor

or unit processor is not transmitted normally because of accidental trouble such as noise or thunder 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, indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again. System returns normally if abnormality was accidental malfunction. If the same abnormality generates again, abnormalitygenerated controller may be defective.

Error Code Abnormal point and detection method Case Judgment and action

OCH526

NO ACK signal

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

Note) The address and attribute displayed

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

(6607)

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

•

Remote controller line

3 Extinction of transmission wire

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

.....

Type

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

Diameter

4 Extinction of transmission wire

voltage and signal is caused by over-numbered units.

5 Accidental malfunction of

abnormality-detected controller (noise, thunder surge)

6 Defective of abnormality-

generated controller

.....

1.25mm

.....

200m

(12m)

or more

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

1 Turn off the power supply of outdoor

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

2 Check address switch of abnormality-

generated address.

3 Check disconnection or looseness of

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

4 Check if tolerance range of transmission

wire is not exceeded.

5 Check if type of transmission wire is correct

or not.

If there were some trouble of 1-5 above, repair the defect, then turn off the power supply of outdoor unit, indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again.

• If there was no trouble with 1-5 above in single refrigerant system (1 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.

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

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

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

1 During group operation with

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

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

6 If address of abnormality source is the

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

Only the system FRESH MASTER or

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

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

Continued to the next page.

From the previous page.

OCH526

Error Code Abnormal point and detection method Case Judgment and action

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

1 During group operation with

indoor unit of multi-refrigerant system, if indoor unit transmit signal to remote controller while outdoor unit power supply of one refrigerant system is 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 transmits signal to FRESH MASTER and there was no reply (ACK).

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

1 During sequential operation

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

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

2 During sequential operation

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

3 Contact failure of transmission

wire of indoor unit of LOSSNAY

4 Disconnection of transmission

connector (CN2M) of indoor unit

5 Defective transmitting

receiving circuit of indoor unit or LOSSNAY

7. If displayed address or attribute is nonexistent.

1 The unit of former address

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

2 Abnormality is detected

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

Error Code Abnormal point and detection method Case Judgment and action

OCH526

M-NET NO RESPONSE

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

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

(6608)

1 Transmitting condition is

repeated fault because of noise and the like.

2 Extinction of transmission wire

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

• Maximum distance

•

Remote controller line

3 Extinction of transmission wire

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

....

Type

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

Diameter

4 Accidental malfunction

of abnormality-generated controller

....

1.25mm

....

200m

(12m)

or more

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.

9-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

Phenomena

1. Remote controller display does not work.

1 DC12V is not supplied to remote controller.

(Power supply display

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

no display is indicated.

• “PLEASE WAIT” is not displayed.

• “PLEASE WAIT” is displayed.

Factor Countermeasure

1 Check LED2 on indoor controller board.

is not indicated on LCD.)

(1) When LED2 is lit.

Check the remote controller wiring for breaking or contact failure.

(2) When LED2 is blinking.

Check short circuit of remote controller wiring.

(3) When LED2 is not lit.

Refer to No.3 below.

2 Check the following.

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

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

2. “PLEASE WAIT” display is remained

3. When pressing the remote controller

on the remote controller.

operation switch, the OPERATION display is appeared but it will be turned off soon.

1 At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to start up.

2 Communication error between the remote controller

and indoor unit

3 Communication error between the indoor and outdoor

unit

4 Outdoor unit protection device connector is open.

1 After cancelling to select function from the remote

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

1 Normal operation 2 Self-diagnosis of remote controller

”PLEASE WAIT” is displayed for 6 minutes 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 normal.

4 Check LED display on outdoor controller

circuit board. Refer to 9-9. Check protection device connector (63L and 63H) for contact failure. Refer to 9-8.

1 Normal operation

Phenomena

OCH526

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

5. When operating by the wireless

remote controller, beep sound is heard, however, unit does not start operating.

6. Remote controller display works

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

7. Remote controller display works

normally and the unit performs heating operation, however, the capacity cannot be fully obtained.

Factor

1 The pair number settings of the wireless remote

controller and indoor controller board are mismatched.

1 No operation for 2 minutes at most after the power

supply ON.

2 Local remote controller operation is prohibited.

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

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

3 Factor of No.2. 1 Refrigerant shortage

2 Filter clogging

3 Heat exchanger clogging

4 Air duct short cycle 1 Linear expansion valve fault

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

2 Refrigerant shortage

3 Lack of insulation for refrigerant piping 4 Filter clogging

5 Heat exchanger clogging

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

Countermeasure

1 Check the pair number settings.

1 Normal operation 2 Normal operation

3 Check the phenomena of No.2. 1 If refrigerant leaks, discharging

temperature rises and LEV opening increases. Inspect leakage by checking the temperature and opening. Check pipe connections for gas leakage.

Open suction grille and check the filter. Clean the filter by removing dirt or dust on it.

3 If the filter is clogged, indoor pipe

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

• 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

temperature rises and LEV opening increases.

Inspect leakage by checking the temperature and opening.

Check pipe connections for gas leakage.

3 Check the insulation. 4

Open suction grille and check the filter. Clean the filter by removing dirt or dust on it.

5 If the filter is clogged, indoor pipe

temperature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pressure. Clean the heat exchanger.

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

8. 1

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

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

12 Normal operation

(For protection of compressor)

12 Normal operation

Phenomena Countermeasure

OCH526

A ﬂ owing water sound or occasional hissing sound is heard.■ These sounds can be heard when refrigerant and/or water is (are) ﬂ owing

Water does not heat or cool well.

Water or vapour is emitted from the outdoor unit.

The operation indicator does not appear in the remote controller display.

“

” appears in the remote controller display.

When restarting the outdoor unit soon after stopping it, it does not operate even though the ON/OFF button is pressed.

FTC operates without the ON/OFF button being pressed.

FTC stops without the ON/OFF button being pressed.

Remote controller timer operation cannot be set.

“PLEASE WAIT” appears in the remote controller display.

An error code appears in the remote controller display.

in the indoor unit or refrigerant pipe, or when the refrigerant and/or water is (are) chugging.

■

Clean the filter of water piping. (Flow is reduced when the filter is dirty or

clogged.)

■

Check the temperature adjustment and adjust the set temperature.

■

Make sure that there is plenty of space around the outdoor unit.

■

During cooling mode, water may form and drip from the cool pipes and joints.

■

During heating mode, water may form and drip from the heat exchanger

of outdoor unit.

■

During defrosting mode, water on the heat exchanger of outdoor unit

evaporates and water vapour may be emitted.

■

Turn on the power switch. “ ” will appear in the remote controller display.

■

During external signal control, “ ” appears in the remote controller dis-

play and FTC operation cannot be started or stopped using the remote controller.

■

Wait approximately 3 minutes. (Operation has stopped to protect the out-

door unit.)

■

Is the on timer set?

Press the ON/OFF button to stop operation.

■

Is the FTC connected to a external signal?

Consult the concerned people who control the FTC.

■

Does “

Consult the concerned people who control the FTC.

■

Has the auto recovery feature from power failures been set?

Press the ON/OFF button to stop operation.

■

Is the off timer set?

Press the ON/OFF button to restart operation.

■

Is the air conditioner connected to a central remote controller?

Consult the concerned people who control the FTC.

■

Does “

Consult the concerned people who control the FTC.

■

Are timer settings invalid?

If the timer can be set,

remote controller display.

■

The initial settings are being performed. Wait approximately 3 minutes.

■

If the remote controller is not only for FTC, change it.

■

The protection devices have operated to protect the FTC and outdoor unit.

■

Do not attempt to repair this equipment by yourself.

Turn off the power switch immediately and consult your dealer. Be sure to

provide the dealer with the model name and information that appeared in the remote controller display.

” appear in the remote controller display?

SIMPLE

, or

WEEKLY

AUTO OFF

appears in the

•

PLEASE WAIT

PLEASE WAIT → Error code

Display messages do not appear even when operation switch is turned ON (operation lamp does not light up).

Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For description of each LED (LED1, 2, 3) provided on the FTC, refer to the following table.

LED1 (power for microprocessor) Indicates whether control power is supplied. Make sure that this LED is always lit. LED2 (power for remote controller) Indicates whether power is supplied to the remote controller.

LED3 (communication between FTC and outdoor units) Indicates state of communication between the FTC and outdoor units.

If the unit cannot be operated properly after test run, refer to the following table to find the cause.

Symptom

Wired remote controller LED 1, 2 (PCB in outdoor unit)

For about 2 minutes after power-on

Subsequent to about 2 minutes after power-on

After LED 1, 2 are lighted, LED 2 is

turned off, then only LED 1 is lighted.

(Correct operation)

Only LED 1 is lighted. →

Only LED 1 is lighted.

This LED lights only in the case of the FTC which is connected to the outdoor unit refrigerant addresses “0”.

Make sure that this LED is always blinking.

LED 1, 2 blink.

→

LED 1 blinks twice, LED 2 blinks once.

•

For about 2 minutes following power-on,operation of the remote controller is not possible due to system start-up. (Correct operation)

•Connector for the outdoor unit’s protection device is not connected.

•Reverse or open phase wiring for the outdoor unit’s power terminal block (L1, L2, L3)

•Incorrect wiring between FTC and outdoor (incorrect polarity of S1, S2, S3)

•Remote controller wire short

Cause

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

OCH526

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 

OCH526

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

Diagnosis flow Cause

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

AC 198V to AC 264V?

YES

NO Check the voltage among L(L3) and

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

AC 198V to AC 264V?

YES

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

•

Troubles concerning

power supply

Inspection method and troubleshooting

• Check the power wiring to the outdoor unit.

• Check the breaker.

Check the voltage of indoor controller board (CN2D).

DC 12V to DC 16V?

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

DC 12V to DC 16V?

YES

AC 198V to AC 264V?

YES

• Bad wiring of the outdoor controller board

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

• Bad wiring of the outdoor controller board

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

• Defective indoor controller board

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

• Check the wiring of the outdoor unit.

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

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

• Check if miswiring, breaking or poor contact is causing this

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

• Replace the indoor

controller board.

•

Check if there is miswiring

or breaking of wire.

• Defective indoor power board

• Replace the indoor

power board.

Symptoms: Nothing is displayed on the remote controller 

OCH526

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

Diagnosis flow Cause

Check the voltage between S1 and of the

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

outdoor unit.

AC 198V to AC 264V?

YES

Check the status of the indoor controller board LED3 display.

Blinking.

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

Is the refrigerant address “0”?

YES

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

S2 on the terminal block (TB4)

Not lighting.

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

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

YES

• Breaking or poor contact of the indoor/ outdoor connecting wire

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

Inspection method and troubleshooting

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

connecting wire.

• Set the refrigerant

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

Is anything displayed?

Displayed.

Is “EA” or “Eb” displayed?

YES

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

DC 17V to DC 28V?

YES

Not displayed.

Is “E8” displayed?

Can the unit be restarted?

Can all the indoor

unit be operated?

YES

• Defective outdoor controller circuit board

YES

• Defective outdoor controller circuit board

• Defective indoor controller board

• Influence of electromagnetic noise

• Defective outdoor power circuit board

• Defective indoor power board

• Replace the outdoor

controller circuit board.

• Replace the outdoor

controller circuit board.

Replace the indoor controller

• board of the indoor unit which

doesn’t operate.

• Not abnormal. There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

• Replace the outdoor

power circuit board.

• Replace the indoor

power board.

Symptoms: Nothing is displayed on the remote controller 

OCH526

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

OCH526

Frequent calling from customers

Phone Calls From Customers How to Respond Note



Unit does not operate at all.

The operating display of remote

controller does not come on.

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

 Check if power is supplied to air conditioner. Nothing appears on the display unless power is supplied.  Wait around 3 minutes to restart unit. The air conditioner is in a state of being protected by the microcomputer’s directive. Once the compressor is stopped, the unit cannot be restarted for 3 minutes. This control is also applied when the unit is turned on and off by remote controller.

Remote controller

 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.)

 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 fan is stopped. The up/down vane will be automatically set to horizontal blow in order to prevent cold air from directly blowing out to human body. The display will turn into “STANDBY” when DEFROST operation ends.

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. Regular filter: 100 hrs.

Phone Calls From Customers How to Respond Note

OCH526

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 zero to the set speed, in proportion to the temperature rise of the discharged air.

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

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

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

OCH526



Something is wrong with the blower…..

Something is wrong with the airflow direction….

Air blows out for a while after

HEAT operation is stopped.



The airflow direction is changed

during COOL operation.

The airflow direction is changed



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

The airflow direction 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 does not have that function, “NOT AVAILABLE” will be displayed on the remote controller when “AIR DIRECTION” or “LOUVER” button is pressed.

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

“STANDBY” will be displayed on the remote controller in case of 1) and 2). “DEFROST” will be displayed on the screen in case of 3).

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

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

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

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

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

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



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.

conditioner is under the control of external directive.

Check if any operations are ordered by distant

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

OCH526

A white mist is expelled from the indoor unit.

Water or moisture is expelled from the outdoor unit.

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

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

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

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

9-6. HOW TO CHECK THE PARTS

OCH526

PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA

Parts name

Thermistor (TH3) <Liquid>

Thermistor (TH4) <Discharge>

Thermistor (TH6) <

2-phase pipe

Thermistor (TH7) <Ambient>

Thermistor (TH8) <Heatsink>

Thermistor (TH32) <Suction>

Thermistor (TH33) <Ref. check>

Thermistor (TH34) <Comp. surface>

(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)

TH4

Normal

160k~410k

Abnormal

TH3 TH6 TH7

4.3k~9.6k

Open or short TH32 TH33 TH34

TH8

39k~105k

Refer to next page.Fan motor

Measure the resistance between the terminals with a tester.



(At the ambient temperature 20

Normal

)

Abnormal

Motor for compressor (MC)

Linear expansion valve (LEV-A/LEV-B/LEV-C)

Gray

Orange Red Yellow Black

1 2 3 4 5

Solenoid valve coil <Bypass valve> (SV)

1435$150

Open or short

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

Normal



)

Abnormal

HRP100, 125YHRP71, 100V

Open or short

0.188  0.302 

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

Normal

Gray - Black Gray - Red

Gray - Yellow

Gray - Orange

46$3

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

Normal

1197$10

Abnormal

Open or short

Abnormal

Open or short

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

OCH526

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 DC280~380V

Yes

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

Recover wiring.

board.

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

Is the voltage normal?

Yes

Replace the fan motor.

Yes

Check the operation of fan. END

Replace outdoor

controller board.

Check the operation. END

Replace outdoor controller board.

Replace the fan motor.

9-7. HOW TO CHECK THE COMPONENTS

Vout (V)

4.5

2.5

0.5

2.5 5 PRESSURE

(MPa)

MULTI CONTROLLER BOARD

5V DC

WHT BLU

Vout

SENSOR

- : 5V (DC) - : Output Vout (DC)

BLK

3 2 1

63HS

MICRO PROCESSOR

GND

OCH526

Low temperature thermistors

• Thermistor <Liquid> (TH3)

• Thermistor <2-phase pipe> (TH6)

• Thermistor <Ambient> (TH7)

• Thermistor <Suction> (TH32)

• Thermistor <Ref. check> (TH33) Thermistor R0 = 15k' ± 3%

B constant = 3480 ± 2%

t =15exp{3480(

0: 15k' 10: 9.6k'

273+t – 273

)}

30: 4.3k'

40: 3.0k' 20: 6.3k' 25: 5.2k'

Resistance (k)

-20-100 1020304050 Temperature ()

Medium temperature thermistor

• Thermistor <Heatsink> (TH8) *SHW80, 112VHA only

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

Rt =17exp{4150(

273+t – 323

)}

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

High temperature thermistor

• Thermistor <Discharge> (TH4)

• Thermistor <Comp. surface> (TH34)

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

t =7.465exp{4057(

273+t – 393

)}

200

150

100

Resistance (k)

500

400

300

25 50 75 100 125

Temperature ()

20: 250k' 30: 160k' 40: 104k' 50: 70k' 60: 48k'

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

Resistance (k)

200

100

50 75 100 120

Temperature ()

Linear expansion valve

OCH526

(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

OFF

ON OFF OFF

Output

5678

OFF OFF

OFF

OFF OFF

ON ON

OFF

ON ON

OFF

OFF OFF OFF

ON OFF OFF



Output

(Phase)

:1 :2

:3 :4

234

OFF

(2) Linear expansion valve operation

Connector LEV-A

LEV-B LEV-C

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.

No sound is heard when the pulse number moves from

B to A in

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

Valve position (capacity)



Extra tightening (about 32 pulse)



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

Open

500 pulse Opening a valve all the way

Pulse number

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

OCH526

<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 body

Hold the lower part of the main body (shown as A) firmly so that the main body does not move and attach the coil by inserting it downward into the main body. Then securely attach the coil stopper to 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.

9-8. EMERGENCY OPERATION

OCH526

(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) on indoor controller board 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 code 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.

Inspected content Open/short of pipe thermistor (TH3/TH6/TH7/TH32/TH33/TH8) Open of pressure sensor (T63HS) 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)

(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.)

OFF

CN31

Shorting pins

SW4

1 2 Cooling

Heating

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

(4) Releasing emergency operation

1 Turn the main power supply off.

SW4

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.

1 2 Cooling

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

Heating

(5) Operation data during emergency operation

OCH526

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

Operation mode

Operation data

COOL Intake temperature (TH1) Indoor pipe temperature (TH2) Indoor 2-phase pipe temperature (TH5) Set temperature

63HS

Pressure saturation temperature (T

) Liquid temperature (TH3) Discharge pipe temperature (TH4) 2-phase pipe temperature (TH6) Ambient temperature (TH7) Temperature difference code (intake temperature - set temperature) (Tj) Discharge superheat (SHd) Sub-cool (SC)

27

5

5 25 50 45 80 50 35

30deg

5deg

HEAT

20.5 45 50 22 50

5

80

5 7

30deg

5deg

Remarks

— — — —

(+1) (+1) (+1) (+1) (+1)

— (+2) (+2)

+1: If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data. When the unit enters emergency operation and TH values are mismatched, set the thermistors to open/short. And the unit runs emegency operation with the values listed above. +2: If one thermistor is set to open/short, the values for each will be different from the list above.

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

Thermistor

TH3

TH6

COOL

45

Regard normal figure as effective data.

HEAT

5

Discharge superheat (SHd) Cooling = TH4 - T Heating = TH4 - T

Degree of subcooling (SC) Cooling = T Heating = T

63HS

TH4

Regard normal figure as effective data. TH5 TH2

63HS

5 5

50 45

Regard normal figure as effective data.

63HS

= Tc - Te

63HS

= Td - Tf

- TH3 = Te - 45

- TH2 = Tf - 45

9-9. TEST POINT DIAGRAM

OCH526

Outdoor controller circuit board PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA

SW1

SW7

Demand control setting

SW6

Model select

SW4

Test operation

SWP

Pump down

SW5

Function switch

SW8

Pipe replace 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,B,C

Linear expansion valve

63HS

Pressure sensor

63L

Low pressure switch

TH4

Thermistor <Discharge>

TH3

Thermistor <Liquid>

TH7/6

Thermistor <Ambient/ 2-phase pipe>

TH32

Thermistor <Suction>

TH33

Thermistor <Ref. check>

VFG

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

7(+)-4(-))

(CNF1

VSP

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

SW9

Function switch

CNF1, CNF2 Connect to the fan motor

1-4: 280 - 380V 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)

Manual defrost, detect history record reset, refrigerant address

CNDC

280V - 380 DC (1+, 3-) (Outdoor power circuit board for SHW80,112V) (Noise filter circuit board for SHW112,140Y)

<CAUTION> TEST POINT1 is high voltage.

CNDM

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

CN51

External signal output

• Compressor operating signal

• Abnormal signal

CN52C

Connect to the power circuit board (SHW80, 112V)

SV2

Bypass valve

SV1

Drain hose heater output

21S4

Four-way valve

CN4

Transmission to outdoor power circuit board (CN4)

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: Not used (SHW112,140Y)

18V DC

(SHW80,112V)

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

CNAC

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

63H

High pressure switch

CNS

S1-S2: 230V AC

Outdoor noise filter circuit board

OCH526

PUHZ-SHW112YHA PUHZ-SHW140YHA

GD1

Connect to the earth

LI1, LI2, LI3, NI POWER SUPPLY

LI1-LI2/LI-LI3/LI3-LI1 : AC400V input LI1-NI/LI2-NI/LI3-NI : AC230V input (Connect to the terminal block (TB1))

CNAC1, CNAC2 AC230V

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

CNDC

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

GD3

Connect to the earth

CNCT Primary current

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

CNL Connect to the ACL4

NO Connect to the outdoor converter circuit board (N-IN)

LO1, LO2, LO3 POWER SUPPLY

LO1-LO2/LO2-LO3/LO3-LO1 : AC400V OUTPUT (Connect to the outdoor power circuit board (TB-L1, L2, L3))

Outdoor power circuit board

OCH526

PUHZ-SHW80VHA PUHZ-SHW112VHA

CN4 Connect to the outdoor controller circuit board (CN4)

Power module

Connect to the smoothing capacitor CB -

Brief Check of POWER MODULE * Usually, they are in a state of being short-circuited if they are broken.

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

1. Check of POWER MODULE 1 Check of DIODE circuit

R - L1 , S - L1 , R - N1 , S - N1 2 Check of IGBT circuit L2 - N1 3 Check of INVERTER circuit P - U , P - V , P - W , N1 - U , N1 - V , N1 - W

Note: The marks R , S , L1 , L2 , P , N1 , U , V and W

shown in the diagram are not actually printed on the board.

CN2 Connect to the outdoor controller circuit board (CN2) 1-5: Transmitting signal to outdoor controller circuit board (0-5 V DC) 2-5: Zero cross signal (0-5 V DC) 3-4: 18 V DC 6-5: 16 V DC 7-5: 16 V DC

CN52C

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

CNDC

280-380 V DC (1+, 3-) Connect to the outdoor controller circuit board (CNDC)

E2, E3

Connect to the earth

W V U L2 P N1 L1

U/V/W

Connect to the compressor (MC) Voltage among phases: 10 V-180 V AC

Connect to the smoothing capacitor CB +

DCL1, DCL2

Connect to DCL

EI, E4

Connect to the earth

CNAC1, CNAC2

230 V AC Connect to the outdoor controller circuit board (CNAC)

NI, LI

Voltage of 230 V AC is input (Connect to the terminal block (TB1))

Outdoor power circuit board

OCH526

PUHZ-SHW112YHA PUHZ-SHW140YHA

Brief Check of POWER MODULE * Usually, they are in a state of being short-circuited if they are broken.

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

1. Check of DIODE MODULE L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1

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

Note: The marks L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W

shown in the diagram are not actually printed on the board.

Diode module

TB-N1

Connect to the CK capacitor

L3 N1L1P1 L2

TB-U, TB-V, TB-W

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

UP2VW

DIP-IPM

TAB connector on X52CA

Connect to the RS resistor

CN4

Connect to the outdoor controller circuit board (CN4)

CN5

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

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

→ Transmitting

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

2-5: Zero cross signal (0-5V DC) 3-4: Not used 6-5: 16V DC 7-5: 16V DC

[ 5 : – 1, 2, 6, 7 : + ]

CN7

Connect to the outdoor converter circuit board (CN7)

CN6

Thermistor <Heat sink> (TH8)

TB-L1, TB-L2, TB-L3

Connect to the outdoor converter circuit board (L1-OU, L2-OU, L3-OU) 400V AC

Outdoor converter circuit board

OCH526

PUHZ-SHW112YHA PUHZ-SHW140YHA

CK-OU

Connect to the CK capacitor

L1-IN, N-IN

Connect to the noise filter circuit board (LO1, No)

L1-A1

Connect to the ACL1

CN7

Connect to the outdoor power circuit board (CN7)

L1-A2, L2-A2, L3-A2

Connect to the ACL1, ACL2, ACL3

L1-OU, L2-OU, L3-OU

Connect to the outdoor power circuit board (TB-L1, L2, L3)

9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

OCH526

(1) Function of switches

Type

switch

Switch

No.

1 2

Function Effective timing

Forced defrost

Abnormal history clear

SW1

Dip

switch

Refrigerant address

setting *2

Push

switch

SW4

SW8

SWP

1 2 1 2

Separate indoor/outdoor

Test run Operating OFF

Test run mode setting Heating Cooling

Use of existing pipe Used Not used

No function

unit power supplies

Pump down Start Normal

Action by the switch operation ON OFF

1 Start Normal

Clear Normal off or operating

123

456ON123456ON123456ON123456

0123

123

456ON123456ON123456ON123456

4567

123

456ON123456ON123456ON123456

891011

123

456ON123456ON123456ON123456

12 13 14 15

——

Used Not used

The black square (

■) indicates a switch position.

When compressor is working in heating operation. +1

When power supply ON

Under suspension

Always

—

When power supply ON

Under suspension

*1 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:. 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.

*2 When the air to water system is used, up to 6 refrigerant address (0 to 5) can be assigned.

Type of

OCH526

Switch

SW5

No.

1 2

3,4,5

Function Effective timing

No function

Power failure

automatic recovery *2

No function

Model select

The black square (

Action by the switch operation

ON OFF

—

Auto recovery

No auto recovery

—

Following SW5-6 reference

—

■) indicates a switch position.

—

When power supply ON

—

Dip

switch

SW7

SW9

SW6

SW5

Setting of demand control

Defrost Hz setting 4 5 6 1 2

No function No function

Defrost setting

No function

Function switch

Starting Ambient temp.

3,4

of flash injection

1 2 3 4 5

Model select

6 7 8 6

SW7-1 SW7-2

OFF

Defrost Hz

— —

For high humidity

—

Valid

SW9-3 SW9-4

OFF OFF

ON ON

MODEL

80V

OFF

123 64745 8

112V

OFF

123 64745 8

SW6

OFF OFF

0.54

OFF

Power consumption (Demand switch ON)

0% (Operation stop)

Ambient temp.

≤ 3 °C (Initial setting)

≤ 0 °C ≤ -3 °C ≤ -6 °C

SW5-6

ON OFF

123456

ON OFF

123456

50% 75%

Normal

— —

Normal

—

Normal

MODEL

112Y

140Y

SW6

ON OFF

123 64745 8

ON OFF

123 64745 8

Always

— —

Always

—

Always

ON OFF

123456

ON OFF

123456

SW5-6

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

“Auto recovery” activates. Please set “Auto recovery” basically by remote controller because all units do not have DIP SW. Please refer to the indoor unit installation manual.

*3 SW7-1,2 are used for demand control. SW7-1,2 are effective only at the demand control.

(Refer to next page : Special function (b))

*4 Please do not use SW7-3, 4 ,6 usually. Trouble might be caused by the usage condition.

(2) Function of connector

Types Connector Function

Action by open/short operation

Short Open

Connector CN31 Emergency operation Start Normal When power supply ON

Effective timing

Special function

OCH526

(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.

NOTE: When the Dip SW 9-1 on the control board of the outdoor unit is ON, set Dip SW9-1 to OFF.

How to wire

<Low-level sound priority mode circuit>

Insulate this point securely as this is not used.

Purchased locally

Adapter for external signal input (PAC-SC36NA-E)

Outdoor unit controller board

Relay supply

SW1

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

Red 3

Brown 2

Orange 1

Max. 10 m including local wiring

  

CNDM

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

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

(b) On demand control (Local wiring)

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

How to wire Basically, the wiring is same with (a). Connect an SW 1 which is procured locally between Orange and Red (1 and 3) of the adapter for external signal input (PACSC36NA-E),

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

Power consumptopn

(SW1 ON)

OFF OFF 0 % (Operation stop)

ON OFF 50 %

OFF ON 75 %

OCH526

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

2 blinking 1 blinking

2 blinking

3 blinking

4 blinking

5 blinking

*1.Error code displayed on remote controller *

2.Refer to service manual for indoor unit.

Connector(63L) is open. Connector(63H) is open. 2 connectors are open.

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 indoor unit.

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

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

Remote controller signal receiving error is detected by remote controller.

Remote controller transmitting error is detected by remote controller.

Remote controller signal receiving error is detected by indoor unit.

Remote controller transmitting error is detected by indoor unit.

Error code is not defined.

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

Communication error of M-NET system

Outdoor controller board A-Control Service Tool

LED1 (Green) LED2 (Red) Error code

Lighted Lighted Lighted Lighted Lighted

Contents Inspection method

Not lighted Not lighted

Lighted

Error

code



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

board is not disconnected.



Check continuity of pressure switch (63H or 63L) 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.26 P.26 P.27 P.27 (EA) P.27 (Eb) P.27

(EC)

P.33 (E8)

P.33 (E9)

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

P.33

P.35~

P.38

page

*2 *2

Indication Error

OCH526

Outdoor controller board

LED1 (Green) 3 blinking 1 blinking

LED2 (Red)

Abnormality of discharging temperature (TH4) and Comp. surface temperature (TH34)

Abnormality of superheat due

Contents Inspection method

Error

code

Check if stop valves are open.

Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller

board are not disconnected.

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

outdoor linear expansion valve using a tester.

to low discharge temperature

2 blinking

3 blinking

Abnormal high pressure (High pressure switch 63H operated.) Abnormal low pressure (Low pressure switch 63L operated.)

Abnormality of outdoor fan motor rotational speed Protection from overheat

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

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

using a tester.

Check the outdoor fan motor.

Check if connector (TH3) (63HS) on outdoor controller board is disconnected.

operation (TH3)

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 outdoor thermistors (TH4, TH34)

Open/short of outdoor thermistors

Check if stop valves are open.

Check looseness, disconnection, and converse connection of

compressor wiring.



Measure resistance values among terminals on compressor using a tester.

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

Check if connectors

controller board and connector disconnected. Measure resistance value of outdoor thermistors.

(TH3, TH32, TH33, TH6, TH7 and TH8)

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

Measure resistance value of outdoor thermistor(TH8).

compressor wiring.



Measure resistance value among terminals on compressor using a tester

Check if power supply voltage decreases. Check the wiring of CN52C. Check the wiring of CNAF.

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

controller board are not disconnected.

Measure resistance value of indoor thermistors.

4 blinking

6 blinking

7 blinking

1 blinking

Abnormality of heatsink temperature

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

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

2 blinking

3 blinking

4 blinking

Abnormality of drain sensor (DS) Float switch connector open (FS)

Indoor drain overflow protection

Freezing (cooling)/overheating (heating) protection

Abnormality of pipe temperature

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)

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

(63H)(63L)

(TH3, TH32, TH33, TH4, TH34 and TH7/6)

on outdoor controller board is not disconnected.

(CN3)

on outdoor power board are not

on outdoor

Detailed

reference

page

P.28

P.29

P.28 P.31

P.29

P.31 P.31

P.32 P.31 P.29 P.28

P.29

P.30

*2 *2

P.34

OCH526

[When optional part “A-Control Service Tool (PAC-SK52ST)” is connected to outdoor controller board (CNM)]

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

Operation indicator SW2 : Indicator change of self diagnosis

SW2 setting

1ON23456

Display detail

The black square (■) indicates a switch position.

Explanation for display Unit

(Be sure that 1 to 6 in the SW2 are set to OFF.)

(1) Display when the power supply ON

When the power supply ON, blinking displays by turns.

1 second

interval

Wait for 4 minutes at the longest.

(2) When the display lights (Normal operation)

1 Operation mode display.

(Lighting)

LED1

The tens digit : Operation mode

Display Operation Model

C H d

OFF / FAN

COOLING / DRY +

HEATING

DEFROSTING

w C5 is displayed during replacement operation.

2 Display during error postponement

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

(3) When the display blinks

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

Display Contents to be inspected (During operation)

Abnormal high pressure (63H operated)

Abnormal high discharging temperature, high comp. surface temperature,

shortage of refrigerant Open/short of outdoor unit thermistors (TH4, TH34)

Open/short of outdoor unit thermistors (TH3, TH32, TH33, TH6, TH7 and TH8)

Abnormal temperature of heatsink

Abnormality of power module

Abnormality of superheat due to low discharge temperature

Abnormality in outdoor fan motor

Overheat protection

Compressor overcurrent interruption (When Comp. locked)

Display Inspection unit

Outdoor unit

Indoor unit 1

Indoor unit 2

Display Contents to be inspected (When power is turned on)

63L connector(red) is open.

63H connector(yellow) is open.

2 connectors(63H/63L) are open.

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

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

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

E0~E7

Current sensor error

Abnormal low pressure(63L operated)

Compressor overcurrent interruption

Abnormality of indoor units

P1~P8

Communication error of M-NET system

A0~A7

The ones digit : Relay output

Display

0 1 2 3 4 5 6 7 8

Warming-up Compressor

— — — — — — —

— ON ON

Compressor

— — —

— ON ON ON ON

—

SW2

1ON23456

4-way valve

—

— ON ON

—

— ON ON

— ON

(Initial setting)

Solenoid valve

—

— —

SW2 setting

OCH526

1ON23456

Display detail

Pipe temperature / Liquid (TH3) – 40~90

The black square (■) indicates a switch position.

Explanation for display

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

0.5 secs. 0.5secs. 2 secs.

Unit

1ON23456

Discharge temperature (TH4) 3~217

Output step of outdoor FAN 0~10

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

Compressor integrating operation times 0~9999

Compressor operating current 0~50

3~217 (When the discharge thermistor detects 100: or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105:;

0.5 secs. 0.5secs. 2 secs.

0~10

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

0.5 secs. 0.5secs. 2 secs.

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

0.5 secs. 0.5secs. 2 secs.

0~50 w Value after the decimal point will be truncated.

Step

100 times

10 hours

1ON23456

Compressor operating frequency 0~225

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

0.5 secs. 0.5secs. 2 secs.

LEV-A opening pulse 0~480

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

digit and ones digit are displayed by turns. (Example) When 150 pulse;

0.5 secs. 0.5secs. 2 secs.

Error postponement code history (1) of outdoor unit

Postponement code display Blinking: During postponement

Lighting: Cancellation of postponement “00” is displayed in case of no postponement.

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

error is displayed by setting SW2 like below.

(SW2)

1ON23456

Pulse

Code

display

Code

display

SW2 setting

OCH526

1ON23456

Display detail

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

The black square (■) indicates a switch position.

Explanation for display

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

0.5 secs. 0.5secs. 2 secs.

Unit

1ON23456

Discharge temperature (TH4) on error occurring 3~217

Compressor operating current on error occurring 0~20

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

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

3~217 (When the temperature is 100: or more, the hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130:;

0.5 secs. 0.5secs. 2 secs.

0~20

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

Code

display

Code

display

1ON23456

Thermo ON time 0~999

Test run elapsed time 0~120

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

OCH526

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 – 39~88

Displayed as an outdoor capacity code.

Capacity SHW80V SHW112V,112Y SHW140Y

Code

14 20 25

• The tens digit (Total display for applied setting) Setting details

H·P /

Cooling only

Single phase / 3 phase

0 : H·P 1 : Cooling only 0 :

Display details

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.

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

0 : Normal 1 :

Display details

For high humidity

Code

display

Code

display

1ON23456

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

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

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

Indoor room temperature (TH1) 8~39

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

8~39

SW2 setting

OCH526

1ON23456

Display detail

Indoor setting temperature 17~30

The black square (■) indicates a switch position.

Explanation for display Unit

17~30

1ON23456

Pressure saturation temperature (T63HS)

-39~88

Outdoor outside temperature (TH7)

-39~88

Outdoor heatsink temperature (TH8)

-40~200

Discharge superheat SHd 0~255

Cooling = TH4-T63HS Heating = TH4-T63HS

Number of defrost cycles 0 – FFFE

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

-40~200 (When the temperature is 0: or less, “–” and temperature are displayed by turns.) (When the thermistor detects 100: or more, hundreds digit, tens digit and ones digit are displayed by turns.)

0~255 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.)

0 – 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.

°C

2 cycles

1ON23456

Input current of outdoor unit

LEV-B opening pulse 0~480

U9 error detail history (latest)

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

0~480 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.)

Description Display

Normal Overvoltage error Undervoltage error Input current sensor error L1-phase open error Abnormal power synchronous signal PFC/IGBT error (SHW80, 112V) 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/IGBT error (20) = 24

00 01 02

04 08 20

0.1 A

Pulse

Code

display

SW2 setting

OCH526

1ON23456

Display detail

DC bus voltage 180~370

The black square (

■) indicates a switch position.

Explanation for display

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

Unit

1ON23456

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

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

Error postponement code history (2) of outdoor unit

Error postponement code history (3) of outdoor unit

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

0~255 (When the capacity is 100%, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 100%;

0.5 secs. 0.5secs. 2 secs.

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

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

Code

display

Code

display

Code

display

1ON23456

Error thermistor display When there is no error thermistor,

“–“ is displayed.

Operation frequency on error occurring 0~255

Fan step on error occurring 0~10

3: Liquid pipe temperature (TH3) 4: Discharge pipe temperature (TH4) 6: 2-phase pipe temperature (TH6) 7: Ambient temperature (TH7) 8: Heatsink temperature (TH8) 32: Suction pipe temperature (TH32) 34: Comp. surface temperature (TH34)

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.

0~10

Code

display

Step

SW2 setting

OCH526

1ON23456

Display detail

LEV-A opening pulse on error occurring 0~480

The black square (

■) indicates a switch position.

Explanation for display Unit

0~480 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130 pulse;

0.5 secs. 0.5secs. 2 secs.

Pulse

1ON23456

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

Indoor pipe temperature / Liquid (TH2) on error occurring

-39~88

Pressure saturation temperature (T

63HS)

on error occurring

-39~88

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

-39~88

8~39

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

0.5 secs. 0.5secs. 2 secs.

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

0.5 secs. 0.5secs. 2 secs.

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

0.5 secs. 0.5secs. 2 secs.

1ON23456

Outdoor outside temperature (TH7) on error occurring

-39~88

Outdoor heatsink temperature (TH8) on error occurring

-40~200

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

0.5 secs. 0.5secs. 2 secs.

-40~200 (When the temperature is 0°C or less, “–” and temperature are displayed by turns.) (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.)

SW2 setting

OCH526

1ON23456

Display detail

Discharge superheat on error occurring SHd 0~255

Cooling = TH4-T63HS Heating = TH4-T63HS

The black square (

■) indicates a switch position.

Explanation for display

0~255 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 150°C;

0.5 secs. 0.5secs. 2 secs.

Unit

1ON23456

Sub cool on error occurring SC 0~130

Cooling = T Heating = T63HS-TH2

Thermo-on time until error stops 0~999

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

-39~88

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

-39~88

63HS-TH3

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

0.5 secs. 0.5secs. 2 secs.

0~999 (When it is 100 minutes or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 415 minutes;

0.5 secs. 0.5secs. 2 secs.

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

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

Minute

1ON23456

Controlling status of compressor operating frequency

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

•

The tens digit

Display

•The ones digit

activated control is displayed.)

Display

(Example) The following controls are activated.

• Primary current control

• Preventive control for excessive tempe rature rise of condensing temperature

• Preventive control for excessive tempe rature rise of heatsink

Compressor operating frequency control

Primary current control

Secondary current control

(In this digit, the total number of

Compressor operating frequency control

Preventive control for excessive temp-

erature rise of discharge temperature Preventive control for excessive temp-

erature rise of condensing temperature

Frosting preventing control Preventive control for excessive temp-

erature rise of radiator panel

Code

display

LED



SW2 setting

OCH526

1ON23456

Display detail

Outdoor suction pipe temperature (TH32)

-39~88

The black square (■) indicates a switch position.

Explanation for display

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

0.5 secs. 0.5secs. 2 secs.

Unit

1ON23456

LEV-C opening pulse 0~480

Outdoor pipe temperature (TH33)

-39~88

Comp. surface thermistor (TH34)

-52~221

U9 error details (To be shown while error call is deferred.)

0~480 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.)

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

-52~221 (When the temperature is 0: or less, “–” and temperature are displayed by turns.) (When the discharge thermistor detects 100: or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105:;

0.5 secs. 0.5secs. 2 secs.

Description Display

Normal Overvoltage error Undervoltage error Input current sensor error L1-phase open error Abnormal power synchronous signal PFC/IGBT error (SHW80, 112V) Undervoltage

 Display examples for multiple errors: Overvoltage (01) + Undervoltage (02) = 03 Undervoltage (02) + Power-sync signal error (08) = 0A L1 phase open error (04) + PFC/IGBT error (20) = 24

00 01 02

04 08 20

Pulse

Code

display

10 FUNCTION SETTING

OCH526

10-1. 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.

<Table 1> Function selections

(1) Functions are available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.)

W1 The functions below are available only when the wired remote controller is used. The functions are not available for

floor standing models.

Function

Power failure automatic recovery Indoor temperature detecting 1

LOSSNAY connectivity

Power supply voltage Frost prevention temperature Humidifier control (Heating mode) Change of defrosting control Refrigerant leakage setting (%)

OFF ON Average data from each indoor unit Data from the indoor unit with remote controller Data from main remote controller Not supported Supported Supported 240V 220V, 230V 2 (Normal) 3 When the compressor operates, the humidifier also operates. When the fan operates, the humidifier also operates. Standard For high humidity 80% 60%

(Indoor unit does not intake outdoor air through LOSSNAY (Indoor unit intakes outdoor air through LOSSNAY)

Meaning of "Function setting" Mode02:indoor temperature detecting

OUTDOOR

Settings

OUTDOOR

)

Mode No.

04 15 16 17 21

Setting No.

(when sent from the factory)

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

OUTDOOR

: Initial setting

Remarks

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

OUTDOOR

No.

Indoor temperature(ta)=

No.1

Average data of the sensor on all the indoor units

No.2

Data of the sensor on the indoor unit that connected with remote controller

No.3

Data of the sensor on main remote controller.

INDOOR

REMOTE (MAIN)

Initial

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

INDOOR

REMOTE (SUB)

INDOOR

REMOTE (MAIN)

INDOOR

REMOTE (SUB)

INDOOR

REMOTE (MAIN)

REMOTE (SUB)

setting

ta=A ta=B ta=A ta=A

ta=C ta=C ta=C ta=C

INDOOR

REMOTE (MAIN)

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

OCH526

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

• When setting functions for a simultaneous twin indoor unit system, set the unit number to 01 to 02 for each indoor case of selecting different functions for each unit referring to 4 setting the indoor unit number of Operating Procedure.

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

)

PKA-HAL

Mode

Function Settings

Filter sign 100h 1

Air flow (

Fan speed

No.of air outlets 4 directions 1

Optional high efficiency filter Vane setting

Energy saving air Disabled flow(Heating mode

Optional humidifier (

PLA only

Vane differential setting in heating mode (

cold wind prevention

Swing Not available Swing Set temperature in heating

mode(4 deg up Fan speed when the Extra low 1 heating thermostat is OFF

Fan speed when the cooling thermostat is OFF

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

)

2500h 07 2

No filter sign indicator Quiet Standard High ceiling

3 directions 09 2 2 directions Not supported Supported

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

)

Enabled Not supported Supported

No.1 setting (TH5: 24-28

No.2 setting (Standard,TH5:28-32

)

No.3 setting (TH5: 32-38 Available Wave air flow

Available Not available

Stop Set fan speed Set fan speed Stop Available

(

Vane No.3 setting : PLA only

) )

PLA

}

Temperature correction: Valid

Temperature correction: Invalid

)

}

PLA

No.

08 2

11 2

12 13

14 2

23 24

25 2

27 28

Setting No.

+1 PKA-HAL/KAL : 2 deg up

3 1

3 1 2

1 3

1 2 1 2 1

3 1 2 1 2

4-Way

cassette

PLA-BA(2)(3)

: Initial setting (Factory setting

- : Not available

Ceiling

concealed

PEAD-EA(2)

PEAD-GA

PKA-GAL

PKA-FAL(2)

Wall mounted

unit in

PKA-KAL

Mode No.11

Setting No. Settings PLA-BA(2)(3)

* Be careful of the smudge on ceiling.

PEAD-RP•JA(L)

Filter sign 100h 1

External static pressure External static pressure

Set temperature in heating mode(4 deg up

Fan speed during the heating thermo OFF

Fan speed during the cooling thermo OFF

Detection of abnormality of the pipe temperature (P8)

Vane No.3 setting No Vanes

Less smudging (

Downward position than the standard

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

Function Settings

2500h 07 2

No filter sign indicator

35/50/70/100/150Pa

)

Available Not available Extra low Stop Set fan speed Set fan speed Stop

Available Not available

Less draft * (

Upward position than the standard

No.

08 10

(

Refer to the right table Refer to the right table

1 2

1 2 3

1 2

: Initial setting

Setting

Mode

No.

)

Factory setting

)

External static

pressure

35Pa 50Pa 70Pa 100Pa 150Pa

Setting No.

Mode No. 08 Mode No. 10

2 3 1 2 3

1 1 2 2 2

Initial setting

(

Factory setting

)

10-1-1. Selecting functions using the wired remote controller

OCH526

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 the remote controller stopped.)



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



Example: Selecting room temperature detection position

Finished

YES



End function display.

(Press



and  at the same time.)

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



[Operating Procedure]

OCH526

 Check the function selection settings.

Changing the function selection settings for each mode will change its relevant mode function. Perform steps  through  to check all the function selection settings, and then change the settings as necessary. For the initial settings, refer to the <T able 1> in the chapter 12-1. The following is the procedure to operate the remote controller internal sensor.

Turn off the remote controller. Set the outdoor address. Hold down 2 buttons simultaneously for 2 seconds: the  and  buttons to set the modes 01 through 14, and the  and  buttons to set the modes 15 through 28.

FUNCTION

The “ ” will flash for a while and show “-- ” as below.

SELECTION

Refrigerant address display section

FUNCTION

*If the and temperature displays flash “” for 2 seconds and stop flashing, this seems to be an error. Check for noise source or interference around the

SELECTION

transmission path.

Note: If the operation is made incorrectly before completion, finish operation by going to the step  and restart from the step .

Press the [ buttons ( and ) to select the desired refrigerant address. The refrigerant address changes from "00" to "15". (This operation is not possible for single refrigerant systems.)

CLOCK]

 Set the indoor unit number.

 Press the

area.

 Confirm the refrigerant address and unit number.

 Press the

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

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

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

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

MODE

 Select the mode number.

 Press the [

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

 Select the setting content for the selected mode.

 Press the

blink, so check the currently set content.

ON/OFF

MODE

Mode number display section

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

TEMP] buttons ( and ) to set the desired mode

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

Unit number display section

button to confirm the refrigerant address and unit

"F"

appears and blinks in the unit number display area and the

button. The currently selected setting number will

Press the buttons( and ) No. in turn such as 00 → 02 → 03 → 04 → AL. Select the unit No. to which the function selection applies.

* 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".

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

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

00 refrigerant address

Outdoor unit

Indoor unit

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

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

Mode number display section

 Press the [

number.

Unit number 01

Confirm

TEMP] buttons ( and ) to select the desired setting

Remote controller

Mode number 02 = Indoor temperature detection

) to indicate the indoor unit

Unit number 02

Fan mode

Setting number display section

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

 Press the

to blink and registration starts.

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

Check to see if there are any sources of noise or interference near the transmission path.  If you wish to continue to select other functions, repeat steps  to  .  Complete function selection.

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

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

tioner OFF screen will reappear.

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

button. The mode number and setting number will start

MODE

FILTER

Setting number 1 = Indoor unit operating average

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

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

TEST

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

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

Setting number 3 = Remote controller built-in sensor

10-1-2. Selecting functions using the wireless remote controller (Type C)

Kmi

OCH526

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

[Flow of function selection procedure]

CHECK

SET

FAN

VANE

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

CLOCK

min

HOUR button

MINUTE button

ON/OFF button

Check button

ON/OFF

MODE

CHECK

TEST RUN

[Operating instructions]

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

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

CHEC

3 Set the unit number. Press the temp button to set the unit number. (Press “01” to specify the indoor unit whose unit number is 01.) Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

By setting unit number with the button, specified indoor unit starts performing fan operation.

min

Detect which unit is assigned to which number using this function. If unit number is set to AL, all the indoor units in same refrigerant system start performing fan operation simultaneously.

* If a unit number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the unit number setting. * If the signal was not received by the sensor, you will not hear a beep or a “double ping sound” may be heard. Reenter the unit number setting. 4 Select a mode. Press the temp button to set a mode. Press “24” to turn on the function that raises the set temperature by 4 degree during heat operation. Direct the wireless remote controller toward the sensor of the indoor unit and press the button.

The sensor-operation indicator will 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 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 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 wireless remote controller for 30 seconds after completing the function setting.

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 the function selection setting.  Switch to function selection mode.

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

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

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



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



(Set address "24" while still in troubleshooting mode, then press the HOUR button.)

 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 wireless remote controller's operation area, the unit ends function selection mode automatically if nothing is input for 10 minutes or longer.



YES

Change unit No.

10-2. FUNCTION SELECTION OF REMOTE CONTROLLER

OCH526

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 / (2)

(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")

Room 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 2 remote controllers are connected to 1 group, 1 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

°F")

• Setting the temperature unit ( or

• 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),

[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

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

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

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

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



[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.



French (F)

(2) Use of clock setting

• To switch the setting, press the [

 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):

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

* When the use of clock setting is OFF , the "WEEKLY TIMER"

(4) Contact number setting for error situation

• To switch the setting, press the [  CALL OFF: The set contact numbers are not displayed in case

one of the followings.)

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

cannot be used.

the operation mode is selected.

 OFF : The automatic mode is not displayed

 CALL **** *** **** : The set contact numbers are displayed

when the operation mode is selected.

CALL_ : The contact number can be set when the display

(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 Upper limit: 30  ~ 19 Heating mode : Lower limit: 17  ~ 28 Upper limit: 28  ~ 17 Automatic mode : Lower limit: 19  ~ 28 Upper limit: 28  ~ 19

• 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 /

• To switch the setting, press the [

  : 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 : 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.

Item 3 (Setting content)

°F) to display



ON/OFF] button.

ON/OFF] button. (Choose

The weekly timer can be used.

The simple timer can be used.

ON/OFF] button.

of error.

in case of error.

is as shown on the left.

TEMP. ( ) and

°F setting

ON/OFF] button.

[Function selection flowchart]

OCH526

Setting language (English)

Change Language

Normal display (Display when the air conditioner is not running)

Hold down the button and press the button for 2 seconds.

Remote controller function selection mode



Item 2Item 1

English



German Spanish

Russian





Italian Chinese French

Hold down the button and press the button for 2 seconds.

Press the operation mode button. Press theTIMER MENU button. Press theTIMER ON/OFF button.

Dot display



TEMP.



PAR-21MAA



MONITOR/SET

BACK DAY

CLOCK

ON/OFF

OPERATION

ON/OFF

CHECK

CLEAR



FILTER



TEST







Function selection

Mode selection

Display mode setting

Japanese

















Item 3



OFF

no1

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



All operation buttons except On/Off button are locked.



no2



OFF



OFF



OFF



OFF



CALL-



°C



°F



OFF



OFF



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.

The temperature range can be changed on automatic mode.

Automatic filter elevation panel up/down operation mode

Not necessary to set this mode. Refer to OPERATION MANUAL of Optional Parts (Panel) for details on operation.

Fixed air flow direction mode

Not necessary to set this mode. Refer to OPERATION MANUAL of indoor unit for details on operation.

The remote controller will be the main controller. (Initial setting value)



The remote controller will be the sub controller.

The clock function can be used. (Initial setting value)



The clock function cannot be used.

Weekly timer can be used. (Initial setting value)



Auto off timer can be used.

Simple timer can be used.

Timer mode cannot be used.

The set contact numbers are not displayed in case of error. (Initial setting value)



The set contact numbers are displayed in case of error.

The temperature unit °C is used. (Initial setting value)



The temperature unit °F is used.

Room air temperature is displayed. (Initial setting value)



Room air temperature is not displayed.

One of “Automatic cooling” and “Automatic heating” is displayed under the automatic mode is running. (Initial setting value)



Only “Automatic” is displayed under the automatic mode.

OCH526

MONITORING THE OPERA TION DA T A BY THE REMOTE CONTROLLER

11-1. HOW TO "MONITOR THE OPERATION DATA"

• Turn on the [Monitoring the operation data]





(3)



Example) Request code "004"

Discharge temperature 69 Refrigerant address "00"



(7) (5)

(1)

(6)

(4)

(1)Press the (2)Press the

Note)

Operating the service inspection monitor

- - - ] appears on the screen (at

[

(The display (at (3)Press the [TEMP] buttons (

[Screen]

(4)Press the [CLOCK] buttons ( and ) to set the desired request code No. (5)Press the

(The requested data will be displayed at  in the same way as in maintenance mode.) Data collected during operation of the remote controller will be displayed.

The collected data such as temperature data will not be updated automatically even if the data changes. To display the updated data, carry out step (4) again.

TEST

CHECK

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

since no buttons are operative.



FIL TER

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.

(2)

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

- - - -"

is blinking)

(6)While [Maintenance monitor] is displayed, press the (7)To return to normal mode, press the

Canceling the Monitoring the operation data

ON/OFF

CHECK

button.

button for 3 seconds to return to maintenance mode.

11-2. REQUEST CODE LIST

OCH526

* Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.

Request content

Request code

Operation state

Compressor-Operating current (rms)

Compressor-Accumulated operating time

Compressor-Number of operation times

Discharge temperature (TH4)

Outdoor unit - Liquid pipe 1 temperature (TH3)

Outdoor unit - Liquid pipe 2 temperature

Outdoor unit-2-phase pipe temperature (TH6)

7 8

Outdoor unit-Suction pipe temperature (TH32) Outdoor unit-Outside air temperature (TH7)

Outdoor unit-Heatsink temperature (TH8)

10 11

Discharge superheat (SHd)

Sub-cool (SC)

13 14

Pressure saturation temperature (T63HS)

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

LEV (C) opening Primary current

DC bus voltage

26 27 28

Number of connected indoor units

Indoor unit-Setting temperature

Indoor unit-Intake air temperature <Thermo judge temperature>

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 11-2-1. Detail Contents in Request Code. 0 – 50 0 – 9999 0 – 9999 3 – 217

-40 – 90

-39 – 88

-40 – 200

0 – 255 0 – 130

-39 – 88

0– 255 0– 255 0– 10

0 – 9999

0– 500 0– 500

0– 500 0– 50

180 – 370

0– 4 17 – 30 8– 39 8– 39

8– 39

-39 – 88

0 – 999 0– 120

10 hours

100 times

Pulses Pulses

Pulses

Minutes Minutes

Unit Remarks

– A

   

  

 



Hz Hz

Step

rpm

Units

 



   

"0" is displayed if the air conditioner is a single-fan type.

A V

"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

OCH526

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 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code.

Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code.

0 – 255

Refer to 11-2-1.Detail Contents in Request Code.

Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code.

Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code.

Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code. Refer to 11-2-1.Detail Contents in Request Code.

"0000": Not connected "0001": Connected

"0000": Not washed "0001": Washed

Displays postponement code. (" - - " is displayed if no postponement code is present) Displays postponement code. (" - - " is displayed if no postponement code is present) Displays postponement code. (" - - " is displayed if no postponement code is present)

"A000"

Code

Unit Remarks

– – – – – –

% – –

– –

– – – – – – –

–

Ver

–

Request content

OCH526

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 superheat (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

Pressure saturation temperature (T

129

Thermo ON time until operation stops due to error

130 131

Indoor - Liquid pipe temperature at time of error

132

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

133

Indoor at time of error

134

• Intake air temperature <Thermo 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. temperature

152

63HS) at time of error

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 3– 217

-40 – 90

-39 – 88

-40 – 200 0– 255 0– 130 0– 255

0– 10

0 – 9999

0– 500 0– 500

-39 – 88 0 – 999

-39 – 88

Unit Remarks

Code Code Code

Sensor

number

– A

10 hours

100 times

   

Step

rpm

Pulses Pulses



Minutes



  

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

fan type.

Average value of all indoor units is displayed if the air conditioner consists of 2 indoor units (twin). Average value of all indoor units is displayed if the air conditioner consists of 2 indoor units (twin).

Request content

OCH526

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 11-2-1 Detail Contents in Request Code. Refer to 11-2-1 Detail Contents in Request Code.

Undefined

Refer to

11-2-1 Detail Contents in Request Code.

Undefined

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".

Unit Remarks

1 hour

10 hours

For indoor fan phase control

–

For indoor fan pulsation control

–

For indoor DC brushless motor control

–

– – – – –

Ver

–

11-2-1. Detail Contents in Request Code

OCH526





[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 ")

Data display

Unit No. 4 state Unit No. 3 state

Unit No. 2 state Unit No. 1 state





Relay output state

Display

0 1

2 3 4 5 6 7 8

Display State

0 Normal 1 Preparing for heat operation 2– 3– 4 Heater is ON. 5 Anti-freeze protection is ON. 6 Overheat protection is ON. 7 Requesting compressor to turn OFF F There are no corresponding units.

Power currently

supplied to compressor

–

ON ON

Example) Request code "004"

A: Maintenance mode display B: Refrigerant address

C: Data display area D: Request code display area

Compressor Four-way valve Solenoid valve

Discharge temperature 69  Refrigerant address "00"

–

ON ON ON ON

ON ON

–

[Outdoor unit – Control state] (Request code ":51")

Data display State 0000Normal 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

Condensation temperature

overheat prevention

protection control

Anti-freeze

Heatsink temperature

overheat prevention

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

OCH526

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  : Detected

Display

Error content  Error content 

Error content

Overvoltage Undervoltage L

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

d E F

1-phase

Power synchronizing

signal error

Display

0 1 2 3

 : Detected

Converter Fo

error

PAM error

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

OCH526

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 A b C d E F

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

935 10 50 11 60 14 71 20 100 25 125 28 140 40 200 50 250

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

OCH526

0: Switch OFF 1: Switch ON

SW1, SW2, SW6, SW7

123456 000000 0000

100000 0001 010000 0002 110000 0003 001000 0004 101000 0005 011000 0006 111000 0007 000100 0008 100100 0009 010100 000A 110100 000b 001100 000C 1 0 1 1 0 0 00 0d 011100 000E 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 0 0 00 00

1 0 00 01 0 1 00 02 1 1 00 03

Data display

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

OCH526

Data display

See the table on the right.

Display Model setting state Display Model setting state

00 PSA-RP•GA, PSH-PGAH 20 01 21 02

PEAD-RP•EA(2)/GA, PEHD-P•EAH22PCA-RP•GA(2), PCH-P•GAH, PLA-RP71-100BA2 03 SEZ-KA•VA 23 04 24 05 SLZ-KA•VA(L) 25 06 PCA-RP•HA 26 07 27 08 28 09 29

0A 2A

0b 2b PKA-RP•GAL, PKH-P•GALH

0C 2C

0d 2d

0E 2E

0F 2F PLA-RP•AA 10 30 11 PEA-RP•EA 31 PLH-P•AAH 12 MEXZ-GA•VA(L) 32 13 33 14 34 15 35 16 36 17 37 18 38 19 39

1A 3A

1b 3b

1C 3C

1d 3d

1E 3E

1F 3F

PKA-RP•FAL(2), PKH-P•FALH

PEAD-RP•JA(L)

PLA-RP•AA2 PLA-RP100BA3, 140BA2

[Indoor unit – Capacity setting information] (Request code 163 )

Data display

See the table on the right.

Display Capacity setting state Display Capacity setting state

00 12 10 112 01 16 11 125 02 22 12 140 03 25 13 04 28 14 05 32 15 06 35, 36 16 07 40 17 08 45 18 09 50 19

0A 56 1A

0b 63 1b

0C 71 1C

0d 80 1d

0E 90 1E

0F 100 1F

[Wireless pair No. (indoor control board side) setting] (Request code 165 )

Data display

See the table on the right.

Display Pair No. setting state

00 No. 0 01 No. 1 J41 disconnected 02 No. 2 J42 disconnected 03 No. 3 J41, J42 disconnected

12 EASY MAINTENANCE FUNCTION

OCH526

L Reduces maintenance work drastically. L Enables you to check operation data of the indoor and outdoor units by remote controller.

Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models.

Smooth Maintenance Function

Easy maintenance information (unit)

Compressor Outdoor unit Indoor unit

Accumulated operating



time

(%10 hours) temperature () temperature ()

Number of ON/OFF Discharge



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

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

Heat exchanger





Discharge temperature 64

Intake air



Heat exchanger







L Conventional inspection work

L

Outdoor unit

Remove the service panel.

Measure the discharge temperature.

L

Indoor unit

Measure the intake air temperature.

Measure the outside air temperature

12-1. MAINTENANCE MODE OPERATION METHOD

If you are going to use 12-2. "GUIDE FOR OPERATION CONDITION", set the airflow to "High" before activating maintenance mode.

L Switching to maintenance mode

Maintenance mode can be activated either when the air conditioner is operated or stopped. It cannot be activated during test run. + Maintenance information can be viewed even if the air conditioner is stopped.

N Remote controller button information





Compressor information

Operation mode

(1)Press the

[Display

TEST



]

MAINTENANCE

button for 3 seconds to switch to maintenance mode.

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

Outdoor unit information

 

Indoor unit information

Confirm

Activate/cancel maintenance mode

L Fixed Hz operation

(2)Press the

(3)Press the

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 to select the desired operation mode.

Stable cooling operation

COOL STABLE MODE

Stable heating operation

HEAT STABLE MODE

Stable operation cancellation

STABLE MODE CANCEL

( ) button to confirm the setting.

[Display

MODE



]

FIL TER



] Waiting for stabilization

Stabilized

After 10 to 20 minutes

L Data measurement

OCH526

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 x10 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 x100 TIMES

Comp discharge temperature

OUTDOOR UNIT OUTLET TEMP

Heat exchanger temperature

INDOOR UNIT

H·EXC. TEMP

COMP ON CURRENT (A)

Outdoor ambient temperature

OUTDOOR UNIT OUTDOOR TEMP

Filter operating time

INDOOR UNIT FILTER USE H

(6)Press the

FIL TER

( ) button to confirm the setting.

[Display example for accumulated operating time]

Display



Waiting for response

Blinking

After approx. 10 seconds

(7)Data is displayed on the display (at ).

To check the data for each item, repeat steps (5) to (7).

(8)To cancel maintenance mode, press the

TEST

N Refrigerant address Single refrigerant system

In the case of single refrigerant system, the refrigerant address is "00" and no operation is required. Simultaneous twin 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

12-2. GUIDE FOR OPERATION CONDITION

OCH526

Inspection item Result

Breaker Good Retightened

Terminal block Outdoor Unit Good Retightened

Loose con-

nection

(Insulation resistance) M

Power supply

Compressor

(Voltage) V

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



Refrigerant/heat exchanger temperature



Refrigerant/discharge temperature

 Air/outside air temperature COOL  HEAT 

(Air/discharge temperature) COOL  HEAT 

T emperature

Appearance Good

Outdoor Unit

Heat exchanger Good Sound/vibration None Present

Cleanli-

ness

Air/intake air temperature COOL  HEAT 



(Air/discharge temperature) COOL  HEAT 



Refrigerant/heat exchanger temperature Filter operating time* Time

T emperature



Decorative panel Good Filter Good

Indoor Unit

Fan Good Heat exchanger Good

Cleanliness

Sound/vibration None Present

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

Indoor Unit Good Retightened

COOL  HEAT  COOL  HEAT 

Cleaning required Cleaning required

COOL  HEAT 

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 40  or higher or

indoor intake air temperature is 23  or lower.

B)In heat mode, outdoor intake air temperature is 20  or higher or

indoor intake air temperature is 25  or lower.

* If the air conditioner is operated at a temperature range other than the

ones above but operation is not stabilized after 30 minutes or more have elapsed, carry out inspection.

* In heat mode, the operation state may vary due to frost forming on the

outdoor heat exchanger.

Is "D000" displayed stably on the remote controller? (

 Discharge temperature) – ( Outdoor

heat exchanger temperature) (

 Indoor intake air temperature) – (

Indoor heat exchanger temperature) Is "D000" displayed stably on the remote controller? (

 Discharge temperature) – ( Indoor

heat exchanger temperature) (

 Indoor heat exchanger temperature) –

(

 Indoor intake air temperature)

Stable Unstable



Stable Unstable



Area Check item

Normal Filter inspection Inspection A

Inspection B Inspection C

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

Judgment

Cool Heat

* The above judgement is just guide based on Japanese standard conditions. It may be changed depending on the indoor and outdoor temperature. * 1 It may be judged as “filter inspection” due to the outdoor and indoor temperature, even though it is not clogged.

Cool mode Heat mode



Indoor



Inspection C

35 30 25

Filter inspection

Normal

15 10

Inspection A

Indoor intake air temperature)— (



010 20304050607080

(

heat exchanger temperature)

Result

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

Inspection B



45 40 35 30 25 20 15 10

Indoor heat exchanger temperature) —

Indoor intake air temperature)





(

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

Inspection C

Filter inspection

Normal

Inspection B

Inspection A

010 20304050607080



12-3. INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION

OCH526

N Remote controller button position



Operation mode

[Display ]



Refrigerant leakage detection (initial teaching)

GAS LEAK TEST START



Compressor information

Outdoor unit information

 

Indoor unit information

Refrigerant leakage detection judgement

GAS LEAK JUDGE

Confirm

This air conditioner (Outdoor unit) can detect refrigerant leakage which may happen during a long period of use. In order to enable the leakage detection, the following settings are required to let the unit memorize the initial condition (initial refregerant amount).

Caution : Make sure to perform the "test run" and confirm the unit works without any problems, before starting the following setting. For more precise detection, make sure to set the airflow at "High notch" before enabling this setting.

1.How to select the "Refrigerant Leakage Detection" mode

Detection is possible regardless the unit`s operation (ON or OFF).



Press button for more than 3 seconds to switch to

"EASY MAINTENANCE" mode.[Display

TEST



]

2.How to start the initial learning



* The initial learning for the leakage detection is always done once after the new installation or the data reset.

Press CLOCK button and select the [GAS LEAK TEST START]

[Display 

] Waiting for stabilization

Stabilized

After 45 minutes

Press ( )button to confirm.

How to finish the initial learning

Once the unit`s operation is stabilized, the initial learning is completed. Press button for more than 3 seconds to cancel the initial leaning. The initial learning can also be cancelled by pressing button.

FILTER

TEST



ON/OFF

3. How to start "Judgment of refrigerant leakage " mode.

OCH526

To know the current condition of refrigerant amount, same operation must be performed. Please repeat the same procedure ~ as when "Initial learning operation" for "Checking operation".

Press CLOCK button and select the [GAS LEAK JUDGE]

Press ( ) button to confirm. (Display LOADING)

Refrigerant leakage detection (initial teaching)

GAS LEAK TEST START

FILTER

Display 

Waiting for response

Refrigerant leakage detection judgment

GAS LEAK JUDGE

Flashing

" 0"

Judgment

Display[C] indication Meaning (% setting)

" 0 " Refrigerant leakage is less than 20% of initial condition. " 20 " Refrigerant leakage is more than 20% of initial condition.

" 8888 " "Error"=No initial data is available.

<Note>

% for judgment can be changed by "Unit function setting of remote controller". Selectable either 80%(initial setting) or 60%

Refer to 12-1 Mode No.21. (When the "%" for judgment is changed, please start "Initial learning ~" about 1 minute () and cancel .) Then, please start "Judgment of refrigerant leakage" mode(~).

When the unit is removed and installed again or refrigerant is charged additionally, the "Initial learning" must be performed again by following procedure.

(1)Turn "Main Power" OFF. (2)Connect the pin of CN31 to ON position on the outdoor controller board. (3)Turn SW4-1 on the outdoor controller board to ON. (4)Turn "Main Power" ON to reset the initial data. After reset the data, please turn pin of CN31 and SW4-1 to original(OFF) position.

1.On the following condition, the operation cannot be stabillized and judgment of cheking operation may not be accurate. (a)Outdoor temperature 40or Room temperature 23 (b)Air flow setting is not "High-notch".

2.Please check the operation and unit status, when the operation is not stabilized after more than 45 minutes.

OCH526

DISASSEMBLY PROCEDURE

PUHZ-SHW80VHA PUHZ-SHW112VHA

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 Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 5 fan grille fixing screws (5 × 12) to detach the

fan grille. (See Photo 1)

(4) Remove a nut (for right handed screw of M6) to detach the

propeller. (See Photo 2-1)

(5) Disconnect the connectors, CNF1, CNF2 on controller cir-

cuit board in electrical parts box.

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

fan motor. (See Photo 2-2)

Photo 1

Grille fixing screws

Photo 2-1

Propeller

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Service panel fixing screw

Fan grille Service panel

Service panel fixing screws

Front panel

Slide

Photo 2-2

Fan motor fixing screws

Top panel

Fan motor

3. Removing the electrical parts box

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the indoor/outdoor connecting wire from

(6) Remove the terminal cover and disconnect the compressor (7) Remove an electrical parts box fixing screw (4 × 10) and

terminal block.

(4) Disconnect the connector CNF1, CNF2, LEV-A, LEV-B and

LEV-C on the controller circuit board.

• CNF1, CNF2 : Fan motor

• LEV-A, LEV-B, LEV-C : LEV

(5) Disconnect the pipe-side connections of the following parts.

• Thermistor <Liquid>(TH3)

• Thermistor <Discharge>(TH4)

• Thermistor <2-phase pipe>(TH6)

• Thermistor <Ambient>(TH7)

• Thermistor <Suction> (TH32)

• Thermistor <Ref. check> (TH33)

• Thermistor <Comp. surface> (TH34)

• High pressure switch (63H)

• Low pressure switch (63L)

• High pressure sensor (63HS)

• 4-way valve coil (21S4)

lead wire.

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.

Fan motor fixing screws

Photo 3

Controller circuit board (C.B.)

Electrical parts box

Electrical parts box fixing screw

Terminal block (TB1)

Valve bed

Screw

Terminal cover

Compressor (MC)

OPERATING PROCEDURE PHOTOS

OCH526

4. Removing the thermistor <2-phase pipe> (TH6) and thermistor <Ambient>(TH7)

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connectors TH7/6 (red) on the controller

circuit board in the electrical parts box.

(4) Loosen the clamp for the lead wire in the rear of the electri-

cal parts box.

(5) Pull out the thermistor <2-phase pipe> (TH6) and thermis-

tor <Ambient> (TH7) from the sensor holder.

Note: In case of replacing thermistor <2-phase pipe> (TH6)

or thermistor <Ambient> (TH7), replace it together.

5. Removing the thermistor <Discharge> (TH4) and thermistor <Comp. surface> (TH34)

(1) Remove the service panel. (See Photo 1) (2) Disconnect the connector TH4 (white) and TH34 (red) on

the controller circuit board in the electrical parts box.

(3) Loosen clamps for the lead wire in the rear of the electri-

cal parts box and the separator. (See Photo 4-1)

(4) Pull out the thermistor <Discharge> (TH4) from the sensor

holder.

[Removing the thermistor<Comp. surface> (TH34)] (5) Remove the sound proof cover (upper) for compressor. (6) Pull out the thermistor <Comp. surface> (TH34) from the

holder of the compressor shell.

Photo 4-1

Photo 4-2

Lead wire of thermistor <Ambient> (TH7)

Sensor holder

Photo 5

Muffler

Clamp

Low pressure switch (63L)

Separator

Compressor (MC)

Clamps

Thermistor <2-phase pipe> (TH6)

Thermistor <Comp. Surface> TH34

Thermistor <Discharge>TH4

Electrical parts box

Heat exchanger

Thermistor <Suction>TH32

Removing the thermistor <Liquid> (TH3), thermistor

<Suction> (TH32) and thermistor <Ref. check> (TH33)

(1) Remove the service panel. (See Photo 1) (2) Disconnect the connectors, TH3 (white) and TH32 (black),

TH33 (yellow) on the controller circuit board in the electrical parts box.

(3) Loosen clamps for the lead wire in the rear of the electrical

parts box (See Photo 4-1) and separator (See Photo 5). (3) Loosen clamp for the lead wire for TH3. (4)

Pull out the thermistor <Liquid> (TH3), thermistor <Suction>

(TH32) and thermistor <Ref. check> (TH33)

from the sen-

sor holder. (TH32 : See Photo 5) (TH33 : See Photo 7)

Photo 6

Thermistor <Comp. surface> (TH34)

Clamp (for TH3)

Thermistor <Liquid> (TH3)

Power receiver

OPERATING PROCEDURE

OCH526

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

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

PHOTOS

Photo 7

[Removing the 4-way valve coil]

(3) Remove 4-way valve coil fixing screw (M5 × 6). (4) Remove the 4-way valve coil by sliding the coil toward you. (5) Disconnect the connector 21S4 (green) on the controller cir-

cuit 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), LEV-B (red) and

LEV-C(blue) on the controller circuit board in the electrical parts box.

8. Removing the 4-way valve

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve

and stop valve fixing screws (5 × 16) then remove the valve bed.

(4) Remove 4 right side panel fixing screws (5 × 12) in the rear

of the unit then remove the right side panel. (5) Remove the 4-way valve coil. (6) Recover refrigerant. (7) Remove the welded part of 4-way valve.

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

cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

9. Removing linear expansion valve

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve

and stop valve fixing screws (5 × 16) then remove the valve bed.

(4) Remove 4 right side panel fixing screws (5 × 12) in the rear

of the unit then remove the right side panel. (5) Remove the linear expansion valve coil. (6) Recover refrigerant. (7) Remove the welded part of linear expansion valve.

High pressure switch (63H)

Linear expansion valve coil (LEV-C)

Linear expansion valve coil (LEV-A)

Linear expansion valves

Thermistor <Ref. check> (TH33)

4-way valve

Linear expansion valve coil (LEV-B)

Low pressure switch (63L)

Linear expansion valve

Note : When installing the linear expansion valve, cover

it with a wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

10. Removing the high pressure switch (63H), the low pressure switch (63L) and

the pressure sensor (63HS)

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 3 right side panel fixing screws (5 × 12) in the

rear of the unit and remove the right side panel.

(4) Pull out the lead wire of high pressure switch and low

pressure switch. (5) Recover refrigerant. (6) Remove the welded part of high pressure switch, low pres-

sure switch, and the pressure sensor (63HS).

Note : When installing the high pressure switch, cover it

with a wet cloth to prevent it from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized.

High pressure sensor (63HS)

4-way valve coil (21S4)

Note 1: Recover refrigerant without spreading it in

the air.

Note 2: The welded part can be removed easily by

removing the right side panel.

OPERATING PROCEDURE

OCH526

PHOTOS

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

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 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 4 capacitor band fixing screws (4 × 10) and remove the capacitor. w The reactor and capacitor are attached to the rear of the electrical parts box.

12. Removing the compressor (MC)

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 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) and 4 ball valve

and stop valve fixing screws (5 × 16) then remove the valve

bed. (7) Remove 3 right side panel fixing screws (5 × 12) in the

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

the separator. (9) Remove the soundproof cover for compressor.

(10) Remove the terminal cover and remove the compressor

lead wire. (11) Recover refrigerant. (12) Remove the 3 points of the compressor fixing nut using

a spanner or a adjustable wrench. (13) Remove the welded pipe of compressor inlet and outlet

then remove the compressor.

Photo 8

Reactor fixing screws

Photo 9

Separator

Reactor (DCL)

Capacitor (CB)

Valve bed

Electrical parts box

Reactor fixing screws

Capacitor band fixing screws

Note: Recover refrigerant without spreading it in the air.

Compressor (MC)

Power receiver

Compressor fixing nut

OPERATING PROCEDURE

OCH526

13. Removing the power receiver

(1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 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) and 4 ball valve and stop valve fixing screws (5 × 16) then remove the valve bed. (7) Remove 3 right side panel fixing screws (5 × 12) in the rear of the unit then remove the right side panel. (8) Recover refrigerant. (9) Remove 4 welded pipes of power receiver inlet and outlet. (10) Remove 2 receiver leg fixing screws (4 × 10).

Note: Recover refrigerant without spreading it in the air.

Photo 10

Power receiver

PHOTOS

Pipes of power receiver

Receiver leg fixing screws

Receiver leg

PUHZ-SHW112YHA PUHZ-SHW140YHA

OCH526

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 Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 5 fan grille fixing screws (5 × 12) to detach the

fan grille. (See Photo 1)

(4) Remove a nut (for right handed screw of M6) to detach the

propeller. (See Photo 2-1)

(5) Disconnect the connectors, CNF1, CNF2 on controller cir-

cuit board in electrical parts box.

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

fan motor. (See Photo 2-2)

Photo 1

Grille fixing screws

Photo 2-1

Propeller

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Service panel fixing screw

Fan grille Service panel

Service panel fixing screws

Front panel

Slide

Photo 2-2

Fan motor fixing screws

Top panel

Fan motor

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

supply wire from terminal block.

(4) Disconnect the connector CNF1, CNF2, LEV-A, LEV-B and

LEV-C on the controller circuit board. <Symbols on the board>

• CNF1, CNF2 : Fan motor

• LEV-A, LEV-B, LEV-C : LEV

(5) Disconnect the pipe-side connections of the following parts.

• Thermistor <Liquid>(TH3)

• Thermistor <Discharge>(TH4)

• Thermistor <2-phase pipe>(TH6)

• Thermistor <Ambient>(TH7)

• Thermistor <Suction> (TH32)

• Thermistor <Ref. check> (TH33)

• Thermistor <Comp. surface> (TH34)

• High pressure switch (63H)

• Low pressure switch (63L)

• High pressure sensor (63HS)

• 4-way valve coil (21S4)

• Reactors (ACL1, ACL2, ACL3)

(6) Remove the terminal cover and disconnect the compressor

lead wire.

(7) Remove 2 electrical parts box fixing screws (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

Noise filter circuit board (N.F.)

Terminal block (TB1)

Fan motor fixing screws

Controller circuit board (C.B.)

Terminal block (TB2)

Electrical parts box

Electrical parts box fixing screw

100

Mitsubishi Electric PUHZ-SHW80VHA, PUHZ-SHW112VHA, PUHZ-SHW112YHA, PUHZ-SHW140YHA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual