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

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

www.zubadan.ro

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.

+ 76 hidden pages

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

Specifications and Main Features

Frequently Asked Questions

User Manual