Mitsubishi PUH-P200MYA, PUH-P250MYA Service Manual

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Page 1

TECHNICAL & SERVICE MANUAL

HEAT PUMP

PUH-P200MYA,PUH-P250MYA

(Single and Twin/Triple/Four)

Models

AIR-COOLED SPLIT-TYPE PACKAGED AIR CONDITIONERS

2005

For use with the R407C

Page 2

Page

Contents

1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT ...................................... 1

[1] Storage of Piping Material ...................................................................................................2

[2] Piping Machining ................................................................................................................. 3

[3] Necessary Apparatus and Materials and Notes on Their Handling ..................................... 4

[4] Brazing................................................................................................................................. 5

[5] Airtightness Test .................................................................................................................. 6

[6] Vacuuming ........................................................................................................................... 6

[7] Charging of Refrigerant ....................................................................................................... 7

2 SPECIFICATIONS ...................................................................................................................... 8

3 EXTERNAL DIMENSIONS ....................................................................................................... 10

4 ELECTRICAL WIRING DIAGRAM ............................................................................................ 11

[1] Outdoor Unit ....................................................................................................................... 11

[2] Skelton of Indoor/Outdoor Connection .............................................................................. 12

5 Technical Data of PUH-P200MYA/P250MYA to Meet LVD .................................................... 13

[1] Standard Operation Data ................................................................................................... 13

[2] Cooling Capacity Curves ................................................................................................... 15

[3] Heating Capacity Curves ................................................................................................... 15

[4] Capacity Reduction Ratio due to Changes in Piping Length ............................................. 16

[5] Center of Gravity (Outdoor unit) ........................................................................................ 17

[6] NC Curve (Outdoor unit) ................................................................................................... 18

6 SERVICE DATA ........................................................................................................................ 19

[1] Appearance of Equipment ................................................................................................. 19

[2] Refrigerant Circuit .............................................................................................................. 21

[3] Limitation of Refrigerant Piping Length.............................................................................. 21

[4] Refrigerant Piping .............................................................................................................. 22

[5] Refrigerant Charge ............................................................................................................ 22

[6] Operation Rage ................................................................................................................. 22

7 CONTROL ................................................................................................................................ 23

[1] Composition of Control ...................................................................................................... 23

[2] Control specifications......................................................................................................... 24

[3] Function of switches and connectors (outdoor unit) .......................................................... 28

[4] Simple parts check method ............................................................................................... 36

[5] Reference Data.................................................................................................................. 37

[6] Troubleshooting of each part ............................................................................................. 38

[7] Emergency operation......................................................................................................... 41

[8] Self-diagnosis and troubleshooting.................................................................................... 43

est run

.................................................................................................................................... 53

Page 3

–1–

¡ PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

Caution

Do not use the existing refrigerant piping.

•A large amount of chlorine that may be contained in the residual refrigerant and refrigerating machine oil in the existing piping may cause the refrigerating machine oil in the new unit to deteriorate.

Use refrigerant pipes made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and free of such contaminants as sulfur, oxides, dust, dirt, shaving particles, oil, and water.

• These types of contaminants inside the refrigerant pipes may cause the refrigerant oil to deteriorate.

Store the pipes to be installed indoors, and keep both ends of the pipes sealed until immediately before brazing. (Keep elbows and other joints wrapped in plastic.)

•

Infiltration of dust, dirt, or water into the refrigerant system may cause the refrigerating machine oil to deteriorate or cause the unit to malfunction.

Use a small amount of ester oil, ether oil, or alkylbenzene to coat flares and flanges.

• Infiltration of a large amount of mineral oil may cause the refrigerating machine oil to deteriorate.

Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system.

• If gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will change and may result in performance loss.

Only use refrigerant R407C.

• The use of other types of refrigerant that contain chlorine (i.e. R22) may cause the refrigerating machine oil to deteriorate.

Use a vacuum pump with a reverse-flow check valve.

•

If a vacuum pump that is not equipped with a reverse-flow check valve is used, the vacuum pump oil may flow into the refrigerant cycle and cause the refrigerating machine oil to deteriorate.

Prepare tools for exclusive use with R407C. Do not use the following tools if they have been used with the conventional refrigerant (gauge manifold, charging hose, gas leak detector, reverse-flow check valve, refrigerant charge base, vacuum gauge, and refrigerant recovery equipment.).

• If the refrigerant or the refrigerating machine oil left on these tools are mixed in with R407C, it may cause the refrigerating machine oil to deteriorate.

• Infiltration of water may cause the refrigerating machine oil to deteriorate.

• Gas leak detectors for conventional refrigerants will not detect an R407C leak because R407C is free of chlorine.

Do not use a charging cylinder.

•

If a charging cylinder is used, the composition of the refrigerant will change, and the unit may experience power loss.

Exercise special care when handling the tools for use with R407C.

• Infiltration of dust, dirt, or water into the refrigerant system may cause the refrigerating machine oil to deteriorate.

If the refrigerant leaks, recover the refrigerant in the refrigerant cycle, then recharge the cycle with the specified amount of the liquid refrigerant indicated on the air conditioner.

•Since R407C is a nonazeotropic refrigerant, if additionally charged when the refrigerant leaked, the composition of the refrigerant in the refrigerant cycle will change and result in a drop in performance or abnormal stopping.

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[1] Storage of Piping Material

(1) Storage location

Store the pipes to be used indoors. (Warehouse at site or owner’s warehouse) Storing them outdoors may cause dirt, waste, or water to infiltrate.

(2) Pipe sealing before storage

Both ends of the pipes should be sealed until immediately before brazing. Wrap elbows and T’s in plastic bags for storage.

* The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil (such as Suniso). Water

infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure. Piping materials must be stored

with more care than with the conventional refrigerant pipes.

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[2] Piping Machining

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

Do not use oils other than ester oil, ether oil or alkylbenzene.

Use only the necessary minimum quantity of oil.

Reason:

1. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside.

Notes:

• Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure.

•

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–4–

[3] Necessary Apparatus and Materials and Notes on Their Handling

The following tools should be marked as dedicated tools for R407C.

<<Comparison of apparatus and materials used for R407C and for R22>>

Apparatus Used Use R22 R407C

Gauge manifold Evacuating, refrigerant filling Current product Charging hose Operation check Current product Charging cylinder Refrigerant charging Current product Do not use Gas leakage detector Gas leakage check Current product Shared with R134a Refrigerant collector Refrigerant collection R22 For R407C use only Refrigerant cylinder Refrigerant filling R22 Identification of dedi-

cated use for R407C: Record refrigerant name and put brown belt on upper part of cylinder.

Vacuum pump Vacuum drying Current product Can be used by attach-

ing an adapter with a

check valve. Vacuum pump with a check valve Current product Flare tool Flaring of pipes Current product Bender Bending of pipes Current product Application oil Applied to flared parts Current product Ester oil or Ether oil or

Alkybenzene (Small

amount) Torque wrench Tightening of flare nuts Current product Pipe cutter Cutting of pipes Current product Welder and nitrogen cylinder Welding of pipes Current product Refrigerant charging meter Refrigerant charging Current product Vacuum gauge Checking the vacuum degree Current product

Symbols: To be used for R407C only. Can also be used for conventional refrigerants.

Tools for R407C must be handled with more care than those for conventional refrigerants. They must not come into contact

with any water or dirt.

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[4] Brazing

No changes from the conventional method, but special care is required so that foreign matter (ie. oxide scale, water, dirt, etc.) does not enter the refrigerant circuit.

Example: Inner state of brazed section

When non-oxide brazing was not used When non-oxide brazing was used

Items to be strictly observed:

1. Do not conduct refrigerant piping work outdoors on a rainy day.

2. Apply non-oxide brazing.

3. Use a brazing material (BCuP-3) which requires no flux when brazing between copper pipes or between a copper pipe and copper coupling.

4. If installed refrigerant pipes are not immediately connected to the equipment, then braze and seal both ends of them.

Reasons:

1. The new refrigerant oil is 10 times more hygroscopic than the conventional oil. The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil.

2. A flux generally contains chlorine. A residual flux in the refrigerant circuit may generate sludge.

Note:

• Commercially available antioxidants may have adverse effects on the equipment due to its residue, etc. When

applying non-oxide brazing, use nitrogen.

Page 8

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[5] Airtightness Test

No changes from the conventional method. Note that a refrigerant leakage detector for R22 cannot detect R407C leakage.

Halide torch R22 leakage detector

Items to be strictly observed:

1. Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment’s airtightness, taking temperature variations into account.

2. When investigating leakage locations using a refrigerant, be sure to use R407C.

3. Ensure that R407C is in a liquid state when charging.

Reasons:

1. Use of oxygen as the pressurized gas may cause an explosion.

2. Charging with R407C gas will lead the composition of the remaining refrigerant in the cylinder to change and this refrigerant can then not be used.

Note:

•A leakage detector for R407C is sold commercially and it should be purchased.

[6] Vacuuming

1. Vacuum pump with check valve A vacuum pump with a check valve is required to prevent the vacuum pump oil from flowing back into the refrigerant circuit when the vacuum pump power is turned off (power failure). It is also possible to attach a check valve to the actual vacuum pump afterwards.

2. Standard degree of vacuum for the vacuum pump Use a pump which reaches 0.5 Torr (500 MICRON) or below after 5 minutes of operation. In addition, be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil. If the vacuum pump is not properly maintained, the degree of vacuum may be too low.

3. Required accuracy of the vacuum gauge Use a vacuum gauge that can measure up to 5 Torr. Do not use a general gauge manifold since it cannot measure a vacuum of 5 Torr.

4. Evacuating time

•Evacuate the equipment for 1 hour after -755 mmHg (5 Torr) has been reached.

• After envacuating, leave the equipment for 1 hour and make sure the that vacuum is not lost.

5. Operating procedure when the vacuum pump is stopped In order to prevent a backflow of the vacuum pump oil, open the relief valve on the vacuum pump side or loosen the charge hose to drawn in air before stopping operation.

The same operating procedure should be used when using a vacuum pump with a check valve.

Page 9

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[7] Charging of Refrigerant

R407C must be in a liquid state when charging, because it is a non-azeotropic refrigerant.

For a cylinder with a syphon attached For a cylinder without a syphon attached

Cylinder color identification R407C-Gray Charged with liquid refrigerant

R410A-Pink

Reasons:

1. R407C is a mixture of 3 refrigerants, each with a different evaporation temperature. Therefore, if the equipment is charged with R407C gas, then the refrigerant whose evaporation temperature is closest to the outside temperature is charged first while the rest of refrigerants remain in the cylinder.

Note:

• In the case of a cylinder with a syphon, liquid R407C is charged without turning the cylinder up side down. Check the

type of cylinder before charging.

Cylin-

der

Cylin-

der

Valve

Liquid

Page 10

–8–

Cooling Heating

18,000 20,400

20.9 23.7

3N~ 380/400/415 V 50 Hz

7.27 7.17

13.0 12.8

Propeller fan × 1

185

0.38

Hermetic

5.5

0.05 (240V)

R407C/FVC68D

Steel plate painting with polyester powder

(MUNSELL 5Y8/1 or similar)

1,715(H) × 990(W) × 840(L)

3.3

Overcurrent protection/Thermal switch

ø12.7 Flare / ø25.4 Flange

PEH-RP200MYA

215

Indoor: 15 °CWB~24 °CWB Indoor: 15°CDB~27 °CDB

Outdoor: -5 °CDB~46 °CDB

Outdoor: -12 °CWB~18 °CWB

2 SPECIFICATIONS

Specifications of air-source heat pump type packaged air conditioner

(Outdoor unit)

Model name PUH-P200MYA Quantity

Capacity

kcal/h

Power source

Power input kW

Current A

Type x Quantity

Fan Airflow rate m3/min

Motor output kW

Type

Compressor Motor output kW

Crankcase heater kW

Refrigerant/Lubricant

External finish

External dimension mm

High pressure protection MPa

Compressor/Fan

Refrigerant piping diameter Liquid/Gas mm

Indoor unit

Noise level dB (A)

Net weight kg

Operating temperature range

Notes:

1. Cooling/Heating capacity indicates the maximum value at operation under the following condition.

Cooling Indoor: 27 °CDB/19 °CWB Outdoor: 35

CDB

Heating Indoor: 20 °CDB Outdoor: 7

CDB/6 °CWB

Pipe length: 7.5m Height difference: 0m

2. Works not included: Installation/Foundation work, Electrical connection work, Duct work, Insulation work, Power source switch, and other items not specified in this specifications.

Protection

device

Page 11

–9–

Cooling Heating

22,400 26,200

26.0 30.5

3N~ 380/400/415V 50Hz

9.02 8.62

16.0 15.4

Propeller fan × 1

185

0.38

Hermetic

7.5

0.05 (240V)

R407C/FVC68D

Steel plate painting with polyester powder

(MUNSEL 5Y8/1 or similar)

1,715(H) × 990(W) × 840(L)

3.3

Overcurrent protection/Thermal switch

ø12.7 Flare / ø28.6 Flange

PEH-RP250MYA

220

Indoor: 15 °CWB~24 °CWB Indoor: 15 °CDB~27 °CDB

Outdoor: -5 °CDB~46 °CDB Outdoor: -12 °CWB~18 °CWB

Specifications of air-source heat pump type packaged air conditioner

(Outdoor unit)

Model name PUH-P250MYA Quantity

Capacity

kcal/h

Power source

Power input kW

Current A

Type x Quantity

Fan Airflow rate m3/min

Motor output kW

Type

Compressor Motor output kW

Crankcase heater kW

Refrigerant/Lubricant

External finish

External dimension mm

High pressure protection MPa

Compressor/Fan

Refrigerant piping diameter Liquid/Gas mm

Indoor unit

Noise level dB (A)

Net weight kg

Operating temperature range

Notes:

1. Cooling/Heating capacity indicates the maximum value at operation under the following condition.

Cooling Indoor: 27 °CDB/19 °CWB Outdoor: 35 °CDB Heating Indoor: 20 °CDB Outdoor: 7 °CDB/6 °CWB

Pipe length: 7.5 m Height difference: 0 m

2. Works not included: Installation/Foundation work, Electrical connection work, Duct work, Insulation

work, Power source switch, and other items not specified in this specifications.

Protection

device

Page 12

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3 EXTERNAL DIMENSIONS

• Models PUH-P200MYA/P250MYA

100 251

234

60 75

194

10048

80 40

121

6 5

840

910

880

990

215

560

1715

225

1490

413

190

149

16531

378

160

198

237

8073

Service panel

4-14X20 holes

<For mounting

anchor bolt M8>

(Field supply)

Plane view

Rear view

Left side view

Front view

Right side view

Refrig. service

valve (liquid)

12.7<flare> Refrig. service

valve(gas)

38.1 Knockout hole

<Bottom side hole for

the power supply>

38.1 Knockout hole <Left side hole for

the power supply>

Knockout hole

<Front side hole for

the power supply and

control wiring>

38.1 Knockout hole <Right side hole for

the power supply>

25.4 Knockout hole

<Bottom side hole for

the control wiring>

25.4 Knockout hole <Left side hole for

the control wiring>

25.4 Knockout hole <Right side hole for

the control wiring>

Knockout hole

Left piping hole

Knockout hole

Front piping hole

Knockout hole

Pressure gauge

(for option)

Knockout hole

Rear piping hole

(It is necessary

for the option)

Connecting pipe

8 :

25.4<brazed>

10 :

28.6<brazed>

Note 1

Note 2

Note 3

Knockout hole

Bottom piping hole

Cross section X-X

Cross section Y-Y

Air outlet

Air

inlet

Air

inlet

• Refrigerant connecting pipe ......................................

1pc.

(The connecting pipe is fixed with the unit)

•Packing for connecting pipe ......................................

1pc.

(It is attached control box cover)

• Conduit mounting plate

(Painted the same color as the unit body)

27 ............................................................................

1pc.

34 ............................................................................

1pc.

40 ............................................................................

1pc.

•Tapping screw 4 x 12 ..............................................

4pcs.

Note: 1. Please leave a space under the outdoor unit for

the piping when you connected the piping from

the bottom.

(Please be careful not to close the hole of the

bottom plate by the basement.)

2. It is possible to change to

27 or

34 by selecting

the conduit mounting plate.

3. The hole size can be selected to

27 or

34 or

40 by selecting the conduit mounting plate.

Page 13

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4 ELECTRICAL WIRING DIAGRAM

[1] Outdoor Unit

• Model PUH-P200MYA/P250MYA

Symbol Name

F1, F2 FUSE (15A 250VAC CLASS T)

F01~F04 FUSE (6.3A 250VAC CLASS F)

F10~F30 FUSE (6.3A 250VAC CLASS F)

51C OVER CURRENT RELAY (COMPRESSOR)

52C MAGNETIC CONTACTOR (COMPRESSOR)

63L PRESSURE SWITCH (LOW PRESSURE)

63H1 PRESSURE SWITCH (HIGH PRESSURE)

63H2 PRESSURE SWITCH (FOR CONTROL)

MC COMPRESSOR MOTOR

MF FAN MOTOR (OUTDOOR)

TR TRANSFORMER

X1 AUXILIARY RELAY (FOR 16, 20HP)

LED 1 LED (FOR SERVICE)

X01~X05 AUXILIARY RELAY (MAIN BOARD)

CN2,CN20~28

CN3,34,30,3N,3S

CN4,40,51~53,81

CONNECTOR MAIN BOARD

CNFC1, FG, S3

CNMT,VMNT

Symbol Name

SW1~SW5 SWITCH (MAIN BORD)

21S4 4-WAY VALVE

SV1 SOLENOID VALVE

CH CRANK CASE HEATER (COMPRESSOR)

LEV ELECTRINIC EXPANSION VALVE

TH1 LIQUID TEMP.

TH2 THERMISTOR DISCHARGE TEMP.

TH3 COND./EVA. TEMP.

TB1 POWER SOURCE TERMINAL BLOCK

TB3, 4 OUTDOOR/INDOOR CONNECTION TERMINAL BLOCK

TB8 TERMINAL BLOCK (FOR 16, 20HP)

C11, C12 CONNECTOR (FAN MOTOR)

C14 CONNECTOR (63H2)

CAFAN, CNFC2

CONNECTOR (F. C. BOARD)

CNPO

CNOUT1, 2

CONNECTOR (N, F. BOARD)

CNIN

Note :

1. Be sure to apply earth work to the unit. (Use the earth terminal of TB1.)

2. The dotted lines show field wiring.

3. Color of earth wire is yellow and green twisting.

4. This motor (*1) includes auto reset type internal thermostat.

5. Indoor and outdoor connecting wires (*2) are made with polarities, make sure matching wiring and terminal.

6. SW5 (*3) is shown PUH-P250MYA setting. In case of PUH-P200MYA setting is shown as below.

Caution :

1. To protect compressor from abnormal current, over current relays is installed. Therefore, do not change factory set value of over current relays.

(*3)

SW5

OFF

63H1

63L

CN23

CN22

CN21

CN26

CN25

CN53

CN52

5 6

CNFC1

CN20

F01

F04

F02

F03

INDOOR UNIT

TB4

S1 S2 S3

(3P)

(5P)

(3P)

(6P)

(7P)

RED

51C

52C

RED

TB1

L2 L3 N PE

POWER SUPPLY 3N~PE 380/400/415V 50HZ

WHITE WHITE

BLACK

(*1)

13 1

C11

(3P)

CNFAN

(5P)

CNFC2

F. C . BOARD

CNPO

(5P)

CNOUT1

BLUE

(5P)

F10

F20

F30

CNIN

(7P)

GREEN/YELLOW

CIRCUIT BREAKER (FIELD SUPPLY) PUH-P200MYA-EU : 50A PUH-P250MYA-EU : 60A

(6P)

CNOUT2

N.F.BOARD

TB3

C12

(3P)

S1 S2 S3

SV1

51C

52C

TO INDOOR UNIT CONNECTING WIRES (*2) (POLER)

21S4

TB8

OUT OUT ININ

CNVMNT

(3P)

X04

X01

X02

X05

CNFG

(3P)

CNMNT

(5P)

(*3)

OFF

SW5

OFF

SW3

X03

LED1

Transmission Circuit

CNS3

(3P)

OUTDOOR UNIT CONTROL BOX

TH1

TH2

LEV

212

CN2

CN40 CN4CN3

(2P)

(6P)

SW4

(2P) (2P)

OFF

SW1

OFF

SW2

CN34

CN28

(3P)

DC power supply

(3P)

TH3

CN3D (3P)

CN3S (3P)

CN3N (3P)

CN24 (3P)

CN27 (3P)

CN81 (3P)

CN51 (5P)

63H2

C14

(2P)

Page 14

–12–

Indoor Units

PEH-RP*MYA PLH-P*KAH, PLH-P*AAH PLA-P*KA, PLA-P*AA PEHD-P*EAH, PEAD-P*EA PCH-P*GAH, PCA-P*GA PKH-P*GALH, PKH-P*FALH PKA-P*GAL, PKA-P*FAL PSH-P*GAH, PSA-P*GA

Indoor Units

PEH-RP*MYA PLH-P*KAH, PLH-P*AAH PLA-P*KA, PLA-P*AA PEHD-P*EAH, PEAD-P*EA PCH-P*GAH, PCA-P*GA PKH-P*GALH, PKH-P*FALH PKA-P*GAL, PKA-P*FAL PSH-P*GAH, PSA-P*GA

Multi distributor pipes (Option)

25 : 25 : 25 : 25

2HP+2HP

+2HP+2HP

–

2.5HP+2.5HP+

2.5HP+2.5HP –

–

SDT-1111SA-E

[2] Skelton of Indoor/Outdoor Connection

(1) Applicable combinations of 8 & 10HP [PUH-P200MYA/P250MYA]

(2) System

Indoor units

Distributor

Remote controller

Outdoor unit

Pipe work

Transmission line

3-core cable

Distributor

Remote controller

Outdoor unit

Pipe work

Transmission line

3-core cable

Indoor unit

Remote controller

Outdoor unit

Pipe work

Transmission line

3-core

*4-core cable

cable 3-core *cable

Indoor units

Twin

TripleSingle

Single

8HP

–

– –

–

10HP

–

– –

–

50 : 50

4HP+4HP

–

5HP+5HP

–

SDD-50WSA-E

33 : 33 : 33

2.5HP+2.5HP +2.5HP

–

3HP+3HP

+3HP

–

SDT-111SA-E

25 : 25 : 50

2HP+2HP

+4HP

–

2.5HP+2.5HP +5HP

–

SDT-112SA-E

20 : 40 : 40

1.6HP+3HP +3HP

–

2HP+4HP

+4HP

–

SDT-122SA-E

PUH-P250MYA PUH-P200MYA

Four

Distributor

Remote controller

Outdoor unit

Pipe work

Transmission line

3-core cable

Indoor units

indicates applicable HP

* Two outdoor units connected when using

PEH-P400·500MYA, therefore 4-core cable required in order to send and receive alternate defrost signal.

Outdoor unit

Indoor Units PEH-P*MYA Indoor Unit PEH-P*MYA

16HP

20HP

– – – –

Page 15

–13–

380 400 415 380 400 415

50 50 50 50 50 50

27/19 27/19 27/19 20/– 20/– 20/–

35/– 35/– 35/– 7/6 7/6 7/6

7.5 7.5 7.5 7.5 7.5 7.5

7.9 7.9 7.9 7.9 7.9 7.9

13.0 13.0 13.0 12.8 12.8 12.8

7.27 7.27 7.27 7.17 7.17 7.17

11.9 11.9 11.9 11.7 11.7 11.7

1.1 1.1 1.1 1.1 1.1 1.1

1.12 1.12 1.12 1.12 1.12 1.12

0.65 0.65 0.65 0.65 0.65 0.65

2.11 2.11 2.11 1.91 1.91 1.91

0.48 0.48 0.48 0.40 0.40 0.40

75 75 75 70 70 70

666000

46 46 46 0 0 0

35 35 35 30 30 30

5 Technical Data of PUH-P200MYA/P250MYA to Meet LVD

[1] Standard Operation Data

(1) PUH-P200MYA

Operating condition

Operating condition Cooling Heating

Voltage V

Power source frequency Hz

Indoor air condition (DB/WB) °C

Outdoor air condition (DB/WB) °C

Piping length m

Refrigerant charge kg

Current A

Input kW

Compressor current A

Fan current A

Current A

Input kW

Discharge pressure MPa

Suction pressure MPa

Discharge refrigerant temperature °C

Suction refrigerant temperature °C

Liquid pipe temperature

(at piping sensor)

°C

Compressor shell bottom temperature °C

Outdoor unit

Indoor unit

Refrigerant circuit

Electrical characteristics

380 400 415 380 400 415

50 50 50 50 50 50

27/19 27/19 27/19 20/– 20/– 20/–

35/– 35/– 35/– 7/6 7/6 7/6

7.5 7.5 7.5 7.5 7.5 7.5

8.4 8.4 8.4 8.4 8.4 8.4

16.0 16.0 16.0 15.4 15.4 15.4

9.02 9.02 9.02 8.62 8.62 8.62

14.9 14.9 14.9 14.3 14.3 14.3

1.1 1.1 1.1 1.1 1.1 1.1

1.64 1.64 1.64 1.64 1.64 1.64

0.94 0.94 0.94 0.94 0.94 0.94

2.22 2.22 2.22 1.75 1.75 1.75

0.50 0.50 0.50 0.38 0.38 0.38

80 80 80 65 65 65

888-1-1-1

48 48 48 0 0 0

30 30 30 20 20 20

(2) PUH-P250MYA

Operating condition

Operating condition Cooling Heating

Voltage V

Power source frequency Hz

Indoor air condition (DB/WB) °C

Outdoor air condition (DB/WB) °C

Piping length m

Refrigerant charge kg

Current A

Input kW

Compressor current A

Fan current A

Current A

Input kW

Discharge pressure MPa

Suction pressure MPa

Discharge refrigerant temperature °C

Suction refrigerant temperature °C

Liquid pipe temperature

(at piping sensor)

°C

Compressor shell bottom temperature °C

Outdoor unit

Indoor unit

Refrigerant circuit

Electrical characteristics

Note: The values listed above indicate that when connected with the indoor unit PEH-RP200MYA as representative data.

Note: The values listed above indicate that when connected with the indoor unit PEH-RP250MYA

as representative data.

Page 16

(3) PUH-P200MYA×2 units

V 380 415 380 415

Hz 50 50 50 50

°C 27/19 27/19 20/– 20/–

°C 35/– 35/– 7/6 7/6

m 7.5 7.5 7.5 7.5

kg 7.9 7.9 7.9 7.9

Current A 13.0 13.0 12.8 12.8

Input kW 7.27 7.27 7.17 7.17

Compressor Current A 11.9 11.9 11.7 11.7

Fan current A 1.1 1.1 1.1 1.1

Current A 4.5 4.1 4.5 4.1

Input kW 2.30 2.30 2.30 2.30

MPa 2.11 2.11 1.81 1.81

MPa 0.52 0.52 0.40 0.40

°C75 75 70 70

°C6 6 0 0

°C46 46 0 0

°C35 35 30 30

Note: The values listed above indicate that when connected with the indoor unit PEH-P400MYA as representative data.

*1: Value for one outdoor unit.

(4) PUH-P250MYA×2 units

V 380 415 380 415

Hz 50 50 50 50

°C 27/19 27/19 20/– 20/–

°C 35/– 35/– 7/6 7/6

m 7.5 7.5 7.5 7.5

kg 8.4 8.4 8.4 8.4

Current A 16.0 16.0 15.4 15.4

Input kW 9.02 9.02 8.62 8.62

Compressor Current A 14.9 14.9 14.3 14.3

Fan current A 1.1 1.1 1.1 1.1

Current A 5.1 4.7 5.1 4.7

Input kW 2.50 2.50 2.50 2.50

MPa 2.22 2.22 1.75 1.75

MPa 0.50 0.50 0.38 0.38

°C80 80 65 65

°C8 8 -1 -1

°C48 48 0 0

°C30 30 20 20

Note: The values listed above indicate that when connected with the indoor unit PEH-P500MYA as representative data.

*1: Value for one outdoor unit.

Cooling Heating

Electrial characterristics

Outdoor unit

Indoor unit

Refrigerant circuit

Discharge pressure

Suction pressure

Discharge refrigerant temperature

Suction refrigerant temperature

Liquid pipe temperature (at piping sensor)

Compressor shell bottom temperature

Cooling Heating

Operating condition

Voltage

Power source frequency

Indoor air condition(DB/WB)

Outdoor air condition(DB/WB)

Piping length

Refrigerant charge

Indoor air condition(DB/WB)

Refrigerant circuit

Discharge pressure

Suction pressure

Discharge refrigerant temperature

Suction refrigerant temperature

Liquid pipe temperature (at piping sensor)

Compressor shell bottom temperature

Outdoor air condition(DB/WB)

Operating condition

Outdoor unit

Piping length

Refrigerant charge

Operating conditionElectrial characterristics

Indoor unit

Voltage

Power source frequency

–14–

Page 17

–15–

[2] Cooling Capacity Curves

• PUH-P200MYA/P250MYA

[3] Heating Capacity Curves

• PUH-P200MYA/P250MYA

-5 -3 -1 1 3 5 7 9 11 13 15171921232527293133353739414345

0.6

0.8

1.2

1.4

Capacity ratio

-5 -3 -1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45

22 20

18 16

0.7

0.9

1.1

1.22

Input ratio

-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18

15 20

0.6

0.8

1.2

1.4

Capacity ratio

-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18

0.6

0.8

1.2

1.4

Input ratio

Indoor inlet air wet

bulb temp. <˚CWB>

inlet air wet

bulb temp. <˚CWB>

Indoor

Indoor inlet air dry

bulb temp. <˚CDB>

Indoor inlet air dry

bulb

temp. <˚CDB>

Outdoor air

temperature

<˚CWB>

Outdoor air temperature

<˚CWB>

Outdoor air temperature

<˚CDB>

Outdoor air

temperature

<˚CDB>

Page 18

–16–

[4] Capacity Reduction Ratio due to Changes in Piping Length

(1) Cooling capacity

(2) Heating capacity

(3) Calculation formula of equivalent piping length

PUH-P200MYA

PUH-P250MYA

Model name

Equivalent piping length

30m 30 ~ 50m 50 ~70m

1.0 0.995 0.99

PUH-P200MYA Equivalent piping length (m) = Actual piping length (m) + (0.47 × Number of bend)

PUH-P250MYA Equivalent piping length (m) = Actual piping length (m) + (0.5 × Number of bend)

6 1.0

4 0.98

2 0.88

0 0.85

-2 0.86

-4 0.89

-6 0.92

-8 0.92

-10 0.92

(4) Reduction ratio by frosting

Outdoor unit inlet wet bulb temperature

Heating capacity reduction ratio

(°CWB)

Capacity ratio

Equivalent piping length (m)

0 10 20 30 40 50 60 70

0.8

0.9

PUH-P200MYA

Capacity ratio

Equivalent piping length (m)

0 10 20 30 40 50 60 70

0.8

0.9

PUH-P250MYA

Page 19

–17–

[5] Center of Gravity (Outdoor unit)

PUH-P200MYA

PUH-P250MYA

XYZ

330 350 490 215

300 330 510 220

Item

Model name

Center of gravity (mm)

Net weight

(kg)

(1) Caution for Lifting

Suspending spot

Protection pad

Name plate

Indicates the unit front side.

Hanger rope (Over 7m × 2)

Service panel

Compressor position

Center of gravity

Inclining to the right front side of unit.

2-point,front and rear

Warning

Must be durable against unit weight. For the lifting of unit for movement, please be sure to suspend at four points, and not to give any shock to unit.

Never apply two-point lifting as it is dangerous.

Use pads properly to prevent the scratching of external panel caused by contact with sling.

Fasten here properly to prevent unit from slipping off from the sling at lifting.

Lift unit slowly by suspending rope uniformly so that the rope will not slip off or unit will not incline seriously.

Be careful that unit may fall down if the rope is not in a proper position as the center or gravity of unit is being inclined.

Below 40˚

Page 20

–18–

[6] NC Curve (Outdoor unit)

(1) Octave Band Analysis

1) PUH-P200MYA

2) PUH-P250MYA

Note: The measuring point is 1m from the bottom of the unit (1m from the front of the unit).

Note:

The measuring point is 1m from the bottom of the unit (1m from the front of the unit).

µPa

Measurement condition

Sound pressure level in anechoic room

56 dB (A)

63Hz63125Hz59250Hz56500Hz551000Hz502000Hz454000Hz428000Hz

OCTAVE BAND PRESSURE LEVEL< dB> 0dB =

Approximate minimum audible limit on continuous noise

63 125 250 500 1000 2000 4000 8000

OCTAVE BAND CENTER FREQUENCIES <Hz>

NC60

NC50

NC30

NC20

(dB)

NC40

Measurement condition

Sound pressure level in anechoic room

57 dB (A)

63Hz63125Hz60250Hz56500Hz561000Hz512000Hz474000Hz448000Hz

OCTAVE BAND PRESSURE LEVEL< dB> 0dB =

Approximate minimum audible limit on continuous noise

63 125 250 500 1000 2000 4000 8000

OCTAVE BAND CENTER FREQUENCIES <Hz>

(dB)

NC60

NC50

NC40

NC30

NC20

Page 21

–19–

• PUH-P200MYA/P250MYA Detail of Electrical Parts Box

(with cover removed) (with Main Board Panel removed)

6 SERVICE DATA

[1] Appearance of Equipment

MAIN BOARD

Power source terminal block

Te rminal block for outdoor/indoor control wiring connection

F. C. BOARD

N. F. BOARD

Overcurrent relay <51C>

Magnetic contactor for compressor <52C>

Transformer

Te r minal block for defrosting signal

Relay for defrosting signal receiving <X1>

• PUH-P200MYA/P250MYA (with cover removed)

Outdoor unit heat exchanger

Compressor

Electrical parts box

Ball valve for refrigerant piping connection <Liquid side> Flare Ball valve for refrigerant piping connection <Gas side> Flange

Page 22

–20–

• PUH-P200MYA/P250MYA (Detail of machine room)

Accumulator

Electric expansion valve (LEV)

Thermistor <Discharge temp.> TH2

Thermistor <Condenser/evaporator temp.> TH3

(At the back of the heat exchanger panel (header cover). When this screw is removed, the header cover is removed.)

Thermistor <Liquid temp.> TH1

4-way valve

Pressure switch

(63H2)

Pressure switch

(63H1)

Solenoid valve(SV1)

Pressure switch (63L)

Check joint (low pressure)

Check joint (high pressure)

Page 23

–21–

[2] Refrigerant Circuit

Flare connection

Flange connection

Brazing connection

Cooling operation

Heating operation

[3] Limitation of Refrigerant Piping Length

PUH-P200,250

L ≤ 50 m H ≤ 40 m

L + a + b ≤ 70 m L + a, L + b ≤ 50 m  a – b  ≤ 8 m H ≤ 40 m, h ≤ 1 m

L + a + b + c ≤ 70 m L + a, L + b, L + c ≤ 50 m  a – b,  b – c ,  c – a ≤ 8 m H ≤ 40 m, h ≤ 1 m

L + a + b + c + d ≤ 70 m L + a, L + b, L + c, L + d ≤ 50 m  a – b ,  b – c ,  c – d,  d – a  ≤ 8 m H ≤ 40 m, h ≤ 1 m

(3) Triple

(1) Single (2) Twin

(4) Four

PUH-P200,250

* Two outdoor units must be connected when using PEH-P400·500MYA.

Total bends are 15 units, and max. bends are 8 units within L + a, L + b, L + c and L +

Indoor units

Indoor heat exchanger

Outdoor unit

Service port

Ball valve

Strainer

Service port

Low pressure switch (Protection)

Solenoid valve

Strainer

High pressure switch (Protection)

High pressure switch (Control)

Muffler

Outdoor heat exchanger

Service port

Accumulator

Service port

Strainer

Multiple-distributor

Ball valve

Compressor

Electric expansion valve

Capillary tube

Page 24

–22–

[4] Refrigerant Piping

[5] Refrigerant Charge

Model Gas pipe Liquid pipe

PUH-P200MYA ø25.4 ø 12.7

PUH-P250MYA ø

28.58 ø 12.7

35, 50, 60, 71 ø 15.88 ø9.52

100, 125 ø19.05 ø 9.52

200

25.4 (ø 12.7)

250

400

500

ø28.58

ø25.4 × 2 ø12.7 × 2

ø12.7 × 2

ø28.58 × 2

12.7

Outdoor unit

Indoor unit

[6] Operation Rage

-5 46

Outdoor air temperature (°CDB)

Indoor air temperature (

°CWB)

-12 18

Outdoor air temperature (°CWB)

Indoor

air temperature (

°CDB)

Additional

* 1

refrigerant charge

0.026× L + 0.014 × (

a + b + c + d) + 1.7(kg)

Amount of refrigerant

at ex-factory

R407C 6.0 kg

R407C 6.5 kg

L: Main section actual length

a + b + c + d: Join section actual length

The value of calculation result at the second decimal place must be rounded up to the first decimal place.

(e.g. 2.22 kg must be rounded up to 2.3 kg) * 1 : For amount of total indoor units

Model

PUH-P200MYA

PUH-P250MYA

Cooling Heating

* 1

0.026× L + 0.014 × ( a + b + c + d) + 1.7(kg)

ø 9.52

* Use the reducer that is provided when using the size of the liquid pipe that is parenthesized in the table.

Page 25

–23–

7 CONTROL

[1] Composition of Control

Function block diagram

3N~ 380/400/415 V 50 Hz

outdoor

indoor

Electrical

terminal block

Indoor/outdoor

connection terminal

Indoor/outdoor

connection terminal

block

Fuse

Transformer

microcomputer

Communication

circuit

DC/DC

converter

LED1

<Power>

DC5V for

12V

Magnetic

contractor

Fuse

Semiconductor relay

Fan control

Over current relay

4-way valve, LEV, solenoid valve, crankcase heater

Outdoor fan

Semiconductor relay

Compressor

Louver

Vane

Drain pump

Others

Remote

controller

terminal block

Remote controller

terminal block

Remote controller

Current

detection

LED2 LED3

DC5V

Key input

LCD

Send/receive

Communication

circuit

Fan control

Indoor fan

Page 26

–24–

[2] Control specifications

(1) Protection functions

1) The main protection devices for the outdoor unit are: a) High pressure protection (63H1) b) Compressor overcurrent protection (51C) c) Liquid temp thermistor trouble (TH1) d) Discharge temperature protection (TH2 ≥118 °C) e) Discharge temp thermistor trouble (TH2) f) Condenser/evaporater temp thermistor trouble (TH3) g) Low pressure protection (63L)

2) When tripping of a detection device is sensed, the check mode is entered and the compressor is stopped. (After 3 minutes, the compressor restarts.) Thereafter, the compressor is stopped when the specified number of check modes or greater is sensed within the check time.

3) Check mode is released by stopping operation, changing the operation mode, or check mode time up. A check mode is also released by stopping of operation by remote controller.

4) Detected check mode history (newest) and abnormality history (last 2 times) are memorized and are displayed on the segment by circuit board DIP switch setting. The operation mode when the newest abnormality was generated, the thermistor temperature (TH1,2,3), and the thermostat ON time can also be displayed.

(2) Compressor, 4-way valve, and crankcase heater control

1) Determines the operation mode and operates the compressor based on the indoor/outdoor communication or MNET communication data.

2) Compressor control has a function which prevents the compressor from restarting within 3 minutes.

3) The 4-way valve is always ON during heating (except during defrosting). In other modes, it is OFF. However, when the operation mode was changed from heating to stop, the 4-way valve is turned off 10 minutes after the compressor was stopped.

4) While the compressor is stopped, the crankcase heater remains ON. (OFF while the compressor is operating.)

5) When the operation mode is changed while the compressor is operating, the compressor stops and 3 minutes later restarts in the new mode.

Protection functions

a) High pressure protection

(63H1)

b) Compressor overcurrent

protection (51C)

c) Liquid temp thermistor

trouble (TH1)

d) Discharge temperature

protection (TH2

118 °C)

e) Discharge temp ther-

mistor trouble (TH2)

f) Condenser/evaporater

temp thermistor trouble (TH3)

g) Low pressure protection

(63L)

Operation value

3.3 MPa

P200MYA: 22 A P250MYA: 27 A

Less than -39 °C or greater than 88 °C

Greater than 118 °C

Less than 0 °C or greater than 216 °C

Less than -39 °C or greater than 88 °C

0 MPa

Detection condition

Compressor operating

Compressor operating except for 10 minutes at end of defrosting and 7 minutes while compressor starting

Compressor operating

Compressor operating except for 10 minutes at end of defrosting and 5 minutes while compressor starting Compressor operating except for 10 minutes at end of defrosting and 7 minutes while compressor starting Compressor operating except for defrosting, 10 minutes at end of defrosting

Number of

check modes

1 time

2 times

1 time

2 times

Check time

–

30 minutes

> =

Page 27

–25–

(3) Fan control

Controls the fan speed based on the piping temperature (TH1) to perform cooling at low outdoor temperatures and heating at high outdoor temperatures.

1) Control at cooling a) When the compressor stops, the fan stops (fan output=0%). b) When the power is turned on, or when the compressor is restated after it has been stopped for 30 minutes or

longer, the piping temperature ( TH1) determines the fan output.

When TH ≤ 25˚C Fan output = 100 % When TH < 25˚C Fan output = 60 %

c) When the compressor is restarted within 30 minutes after it has been stopped, the fan step before the compres-

sor was stopped is selected. However, when the fan output was under 30% when the fan was stopped, 30% is

selected. d) When the mode was changed from heating to cooling, the fan step conforms to item 2. e) Two minutes after the fan is started, the fan step (number of units) is controlled every 30 seconds based on the

piping temperature (TH1). f) When TH1 reaches 50˚C or higher, or when the control high pressure switch (63H2) tripped, the fan output

becomes 100%. g) Fan output while the compressor is operating is within the 20% to 100% range.

•FAN step The following expression determines the next fan step count nj+1: nj + 1 = nj + ∆nj nj: Current fan step, ∆nj: Displacement step amount nj control

• If nj + 1 ≥ 100% nj + 1 = 100%

• If nj + 1 ≥ 20% nj + 1 = 20%

• If TH1 ≥ 50 °C or 63H2 is “OFF” nj + 1=100%

FAN ∆nj Outputs are all %.

* In the night mode, the maximum value of nj is 80%. (When TH1 < 50˚C)

Target condensation temperature 31 °C

Condensation temperature TH1

20 ≤ nj < 50 50 ≤≤ nj 100

Current

output

t > 49 °C

t = 49

t > 46

t = 46

t > 43

t = 43

t > 40

t = 40

t > 36

t = 36

t > 33

t = 33

t > 29

t = 29

t > 26

-2

t = 26

t > 23

-2

t = 23

t > 20

-3

-4

≤

20 ˚C

-5

-10

Page 28

–26–

T = 17

T > 15

-3

2) Control at heating a) When the compressor is stopped and during defrosting, the fan is stopped. b) When the power is turned on, or when the compressor is restarted after being stopped for 30 minutes or longer,

the piping temperature (TH1) determines the fan step.

TH1 > 8˚C Fan output = 60% TH1 ≤ 8˚C Fan output = 100%

c) When the compressor is restarted within 30 minutes, the fan step is the step before the compressor was stopped. d) When the mode is changed from cooling to heating, the fan step conforms to item b). e) When returning from defrosting, the fan step is the step before defrosting. f) Two minutes after the fan was restarted, the fan step is controlled every 30 seconds based on the piping

temperature (TH1).

g) When TH1 is -5˚C or lower, the fan output is made 100%.

•FAN step The following expression determines the next fan step count nj + 1: nj + 1 = nj + ∆nj nj: Current fan step, ∆nj: Displacement step amount nj control

• If nj + 1 ≤ 100% nj + 1 = 100%

• If nj + 1 ≤ 20% nj + 1 = 20%

• If TH1 < -5 °C nj + 1=100%

FAN ∆nj Outputs are all %.

(4) Defrosting control

1) When the following conditions are satisfied, defrosting starts: a) When the integrated compressor operation time has exceeded T

1 (initial setting 50 minutes) and the piping

temperature (TH1) is below -10˚C

b) When the integrated compressor ˚C

Piping differential temperature ∆TH1 = TH10 - TH1

2) The defrosting prohibit time T

1 is set as following based on the defrosting time T2:

Note: T

1 is reset at the end of defrosting, or by cooling ON command.

Note: When the compressor was stopped during defrosting, T1 = 20 minutes is set to recognize the stop as

defrosting end.

3) During defrosting, all the outdoor fans are stopped and the bypass solenoid valve (SV1) is turned ON and the 4-way valve (21S4) is turned OFF.

4) When the following conditions are satisfied, defrosting ends: a) T

2 ≤ 2 mins TH1 ≤ 30°C

b) 2 < T

2 < 15 minutes TH1 ≤ 8°C continuous 2 minutes

c) T

2 =15 minutes

5) When

6) When using PEH-P400·500MYA, alternate defrosting is possible after sending and receiving each respective outdoor unit defrost signal.

the fan and 4-way valve (21S4) are turned ON at the end of defrosting, the heating mode is reset. Two

minutes after defrosting reset, the bypass solenoid valve (SV1) turns OFF.

Target evaporation temperature 10 °C

Evaporation temperature TH1

20 ≤ nj + 1 ≤ 100

Current

output

T > 19 °C

-10

T = 19

T > 17

-4

T = 15

T > 13

-2

T = 13

T > 11

-2

T = 11

T > 8

T = 8

T > 6

T = 6

T > 4

T = 4

T > 2

T = 2

T > 0

T≤ 0˚C

Current piping temperature

Piping temperature 10 minutes after starting or 10 minutes after returning from defrosting

2 ≤ 3 (minutes) T1 60 (minutes)

3 < T2 < 15 40 T

= 15

Page 29

–27–

(6) Electronic expansion valve (LEV)

1) Initial processing after power turned on

After the power is turned on, full close processing is performed as initial drive processing. a) A 2200 pulses down is output from power on. b) At the end of 2200 pulse down output, 60 pulses up is output. c) Sixty pulses up output ends initial processing. At this point, the valves are fully closed.

2) Control contents

3) Normal LEV control

a) The operation frequency when the compressor is started (including after defrosting reset) determines the stan-

dard opening angle.

b) After a) above, sub cool (SC) shown below controls the LEV opening angle.

<Definition of SC> Cooling: SC = TH3 (outdoor unit)-TH1 (outdoor unit) Heating: SC = TH5 (indoor unit)-TH2 (indoor unit) * When there are multiple indoor units, the value of TH2 and TH5 is the average value of TH2 and TH5 of all

the indoor units. <LEV control> LEV is controlled so that SC is equal to SCm. SC < SCm: LEV opening angle is made smaller SC > SCm: LEV opening angle is made larger SC = SCm: LEV opening angle remains unchanged SCm = 5~15 (SCm is different with Indoor Units.)

4) Transient LEV control a) When outlet temperature (outdoor unit TH2) rises

When the outlet temperature (outdoor unit TH2) exceeds 115 °C, the LEV opening angle is made larger.

(7) Service functions

1) Abnormality history clear

a) When DIP SW1-2 is turned ON while the compressor is operating or stopped, the abnormality history is cleared.

(5) Bypass solenoid valve control (SV1)

1) Control at cooling

a) While the compressor is stopped, the solenoid valve is OFF. b) When the power is turned on, or when the compressor is restarted after it has been stopped for 30 minutes or

longer, if the liquid temperature (TH1) is 25˚C or higher then the solenoid valve turns ON for 2 minutes.

c) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 5 minutes if the liquid temperature (TH1) is staying below 25˚C. d) The item b) or c) is applied to the mode change from heating to cooling. e) When the previous operation mode is cooling and the compressor restarted within 30 minutes after it’s stopping

by the tripping of 63H2, the solenoid valve turns ON for 2 minutes.

2) Control at heating a) While the compressor is stopped, the solenoid valve is OFF. b) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 2 minutes if the liquid temperature (TH1) is staying above 8˚C.

c) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 5 minutes if the liquid temperature (TH1) is staying below 8˚C. d) The item b) or c) is applied to the mode change from cooling to heating. e) When the control pressure switch (63H2) trips, the solenoid valve turns ON. f) If 63H2 resets 15 minutes after tripping, the solenoid valve turns OFF. g) During defrosting, the solenoid valve turns ON. h) When the previous operation mode is heating and the compressor restarted within 30 minutes after it’s stopping

by the tripping of 63H2, the solenoid valve turns ON for 2 minutes. i) When the previous operation mode is heating, and the compressor restarted within 30 minutes after the tripping

of 63L, the solenoid valve turns ON for 2 minutes.

At compressor starting At compressor stopping At defrosting Normal

LEV output opening angle

Initial opening angle

1000 pulses

2000 pulses (full close)

See next item

Opening angle control range

Approx. 1000 to 2000 pulses

– –

1000 to 1500 pulses

Page 30

–28–

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

01234

56789

10 11 12 13 14

[3] Function of switches and connectors (outdoor unit)

(1) Function of switches

1) Function of switches (Normal mode)

Switch

SW1 CN33 When

open

(Normal)

SW2

SW3

SW4

SW5

Switch effec-

tive timing

–

Running or

stopped

When power

turned on

Running or

stopped

stopped*

stopped

–

When power

turned on

When power

turned on

Operation by switch operation

ON OFF

––

Clear Normal

See pages 29 to 34.

Operate Stop

Heat Cool

Do Do not

Do not Do

Cooling only Heat pump

PUH-P250MYA PUH-P200MYA

Normal mode

SW3 = Unrelated

Kind of

switch

DIP SW

Tact SW

DIP SW

Pole

1 2 3 4 5 6

1 2 1

Function

None

Abnormality history clear

Refrigerant system

address setting

Self diagnosis

Mode input register

Trial run

Trial run mode switching

Inlet temp. re-reading

3-phase power source

detection

Cooling only switching

Model setting

Remarks

Function

None

Night mode

Defrosting end switching

Defrosting prohibit time

switching

None

Switch effec-

tive

timing

–

stopped

–

Switch

SW1 When CN33

shorted

(mode

switching)

Operation by switch operation

ON OFF

––

Night mode Normal mode

Fixed Training

––

Kind of

switch

DIP SW

Pole

1 2 3

*1 Trial run performs trail run processing by input change while stopped. (For details, see the trail run section) *2 Mode input is entered by SW3 OFF→ON change (___↑). Press and hold down SW3 for about 2 seconds. The set

mode can be registered according to the outdoor unit setting information on page 31.

2) Switch functions at set mode change

Note: After changing the mode by CN33 shorting (mode switching), return to the normal mode by opening CN33.

3) Connector function assignment

12 °C continuous 2 minutes

8 °C continuous 2 minutes

Set input mode

CN33 = short SW3 = ON*

→

Shows that Nos. 3, 4, 5 , and 6 of SW1 are ON.

Type

Connector

CN31 CN32 CN33

Function

Emergency operation

Function test

DIP switch mode switching

Operation by open/short

short open

Start Normal

Function mode Normal

Mode switching Normal

Switch effec-

tive timing

At initialization At initialization

stopped

Page 31

–29–

Display Check unit

0 Outdoor unit 1 Indoor unit 1 2 Indoor unit 2 3 Indoor unit 3 4 Indoor unit 4

Display Compressor 4-way valve Bypass solenoid valve

0– – – 1– – ON 2– ON – 3– ON ON 4ON – – 5ON – ON 6ON ON – 7ON ON ON

The operation status and check code contents can be ascertained by means of the 2-digit number and symbol on digital display light emitting diode LED2 by operating DIP switch SW2.

• When ON (normal operation): Displays the operation mode.

• When blinking (Operation stopped by tripping protection device): Displays the check mode

[Tens digit: Operation mode]

Display Operation mode

O stopped C Cooling/Dry H Heating

d Defrost

[Units digit: Relay output]

• PUH-P8MYA/P10MYA

Display Check contents (at power on)

E8 Indoor-outdoor communication receive abnormal (outdoor unit) E9 Indoor-outdoor communication send abnormal (outdoor unit)

Indoor/outdoor connection erroneous wiring, number of indoor units mismatch

Indoor/outdoor connection erroneous wiring (indoor unit power failure, disconnection)

Ed Serial communication abnormal (M-NET)

E0-E7 Communication other than outdoor unit abnormal

F8 Input circuit faulty

Display Check contents (operating)

U2 Compressor discharge temperature abnormal, CN23 short-circuit connector unplugged U3 Compressor discharge temp thermistor (TH2) open/short U4 Liquid temp thermistor (TH1), Condenser/evaporater temp thermistor (TH3) open/short U6 Compressor overcurrent protection trip (51C trip)

UE High pressure protection (63H1 trip)

UL Low pressure protection (63L trip) P1-P8 Indoor unit abnormal A0-A8 M-NET communication abnormal

SW2

LED2

12 3 4 5 6

OFF

(Load status)

Page 32

–30–

°C

100 times

10 hours

5 pulses

Check mode 1 display method

bit 1 ..... Compressor discharge temperature

abnormal

bit 2 ..... Compressor discharge temp thermistor

abnormal (TH2)

bit 3 ..... CN23 short-circuit connector un-

plugged

bit 5 ..... Liquid temp thermistor abnormal (TH1)

SW2 setting Display contents Description of display Unit

Liquid temperature (TH1)

-39 ~88

Discharge temperature (TH2) 0 ~

216

FAN output 0 100

Number of compressor ON/OFF 0 999

0 999

~ ~ 0 999

~ 0 999

Compressor integrated operation time

Current check mode code 1

Current check mode code 2

LEV opening angle (/5) 0 400

(When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When -10,

every other second –

←→ 10

0 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 115,

every other second 1

←→ 15

0 100 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

(When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 425,

every other second 4

←→ 25

(When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

Check mode segment display method Segment and bit correspondence

Check mode 2 display method

bit 1 ..... Overcurrent trip (Comp)

bit 2 ..... Low pressure protection

0 400 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 200 ,

every other second 2

←→ 00

Self diagnosis by SW2

• PUH-P200MYA/P250MYA

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

bit 2 bit 3

bit 1

bit 5

bit 6 bit 7

bit 4

bit 8

Page 33

–31–

Newest check code Newest outdoor unit abnormality Check display

Operation mode when abnormality occurred

Liquid temperature (TH1) when abnormality occurred

- 39 ~

- 39 ~ 88

COMP discharge temperature (TH2) when abnormality occurred 0 216

Check code history (1) (newest) Abnormal unit No. and check code inverted display

Check code history (2) (One before newest) Abnormal unit No. and check code inverted display

Current thermostat ON time 0 999

Number of indoor units connected 0 4

When no check mode,“00” <Example> When piping thermistor abnormal U4

Operation mode when abnormally stopped <Example> Comp. only ON at cooling operation C4

(When 0 °C or lower, “–” and temperature are displayed alternately.) <Example> When -15,

every other second –

←→ 15

0 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 130,

every other second 1

←→ 30

When no abnormality history “0”, “←→”, “–”

0 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

0 4

Code display

°C

Code display

Minutes

Units

SW2 setting Display contents

Description of display

Unit

1 23456

OFF

123 456

OFF

123 456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

123 456

OFF

Page 34

–32–

Outdoor unit capacity is displayed as function code.

Model name function code

PUH-P200MYA 20 PUH-P250MYA 25

-39 88

(When 0 °C or lower, “–”and temperature are displayed alternately.) When there are no indoor units, “00” is displayed.

8 39.5

When there are no indoor units, “00” is displayed.

17 30

When there are no indoor units, “00” is displayed.

Outdoor unit set information 1

Outdoor unit set information 2

Indoor unit piping temperature (TH2) Indoor 1

Indoor unit piping temperature (TH2) Indoor 2

Indoor unit piping temperature (TH2) Indoor 3

Indoor unit piping temperature (TH2) Indoor 4

Indoor intake temperature

Indoor set temperature

Code display

°C

SW2 setting Display contents Description of display Unit

Outdoor unit set information 1 Function setting (display valves) 3-phase power source detection Do (1) Do not (0) Cooling only switching Cooling only (2) H/P (0) Night mode Night mode (1) Normal mode (0) Defrosting end time

12 °C continuous 2 minutes

(2)

8 °C continuous 2 minutes

(0)

Defrosting prohibit time Fixed (4) Training (0)

Tens digitUnits digit

Set information display values are added and displayed at each position.

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

Page 35

–33–

Indoor unit control status Indoor 1, 2

Indoor unit control status Indoor 3, 4

Condenser/evaporater temperature (TH3)

Outdoor unit control status

Discharge super heat SHd 0 216 Cooling: Outdoor TH2 -

Outdoor TH3

Heating: Outdoor TH2

- Indoor TH3 (Average)

Sub cool Sc 0 130 Cooling: Outdoor TH3

- Outdoor TH1

Heating: Indoor TH3

(Average) Indoor TH2 (Average)

Target sub cool step N 1 5

-39 88 (When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When -10,

every other second –

←→ 10

0 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 150,

every other second 1

←→ 50

0 130 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

1 5

–

°C

–

°C

–

SW2 setting Display contents Description of display Unit

Indoor unit No.1 Indoor unit No.3

Indoor unit No.2 Indoor unit No.4

Control mode

Indoor unit

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Freeze prevention

Surge prevention

Compressor OFF

Display

0 1 2 3 4 5 6 7

Outdoor unit

← ← ← ← ← ← ← ←

Control mode display system

Indoor unit No.1 Indoor unit No.3 Outdoor unit

Indoor unit No.2 Indoor unit No.4

Control mode

Indoor unit

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Freeze prevention

Surge prevention Compressor OFF

Display

0 1 2 3 4 5 6 7

Outdoor unit

← ← ← ← ← ← ← ←

1 23456

OFF

1 23456

OFF

1 23456

OFF

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Page 36

–34–

Communication demand capacity 0 255

Abnormal thermistor display 1 3, –

FAN output at abnormal stop 0 100

LEV opening angle (/5) at abnormal stop 0 400

Outdoor Condenser/ evaporater temp temperature at abnormal stop

-39 88

Discharge super heat SHd at abnormal stop 0 216 Cooling: Outdoor TH2-

Outdoor TH3

Heating: Outdoor TH2-

Indoor TH3 (average)

Sub cool Sc at abnormal stop 0 130 Cooling: Outdoor TH3-

Outdoor TH1

Heating: Indoor TH3

(average) -Indoor TH2 (average)

0 255 When communication demand not set: 100% (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

1 3, – 1: Outdoor liquid temp thermistor (TH1) 2: Outdoor discharge temp thermistor (TH2) 3: Outdoor condenser/evaporater temp thermistor (TH3) –: No abnormal thermistor

0 100 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second

←→ 00

0 400 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 200,

every other second 2

←→ 00

-39 88 (When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When -10,

every other second –

←→ 10

0 216 (When 100 °C or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 150,

every other second

←→ 50

0 130 (When 100 °C or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

–

5 pulses

°C

SW2 setting Display contents

Description of display

Unit

1 23456

OFF

1 23456

OFF

123456

OFF

123456

OFF

123456

OFF

1 23456

OFF

123456

OFF

Page 37

–35–

Thermostat ON time up to abnormal stop 0 999

LEV regular control count n 1 5

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 1

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 2

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 3

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 4

0 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

1 5

-39 88

(When 0 ˚C or lower, “–”and temperature are displayed alternately.) When there are no indoor units, “00” is displayed.

Minutes

–

˚C

SW2 setting Display contents

Description of display

Unit

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

1 23456

OFF

Page 38

–36–

[4] Simple parts check method

• PUH-P200MYA/P250MYA

Part name

Thermistor (TH1) <Liquid temperature detection> Thermistor (TH2) <Discharge temperature detection> Thermistor (TH3) <Condenser/ evaporater temperature detection>

Fan motor

Compressor

Thermal protector trip temperature 135 ±5˚C : ON 88 ±5˚C : OFF

Judgment instructions

Disconnect the connector and measure the resistance value with a multimeter. (Ambient temperature 10 ˚C to 30 ˚C)

Measure the resistance value across the terminals with a multimeter. (Winding temperature 20 ˚C)

Normal

4.3 kΩ~9.6 kΩ

160 kΩ~410 kΩ

Abnormal

Open or short

(Based on thermistor characteristic table (next page))

TH1, 3

TH2

White

Blue

Black

Normal

45.5 Ω

Abnormal

Open or short

Motor lead wire

Between 2 phases

Normal

PUH-P200MYA

Each phase 1.574 Ω

PUH-P250MYA

Each phase 1.263 Ω

Abnormal

Open or short

Red

Page 39

–37–

[5] Reference Data

Low temperature thermistor Thermistor <Liquid temperature detection> (TH1)

Thermistor <Condenser/evaporater temperature detection> (TH3)

Thermistor <Liquid temperature detection> (TH1) Thermistor <Condenser/evaporater temperature detection> (TH3) Thermistor Ro = 15 kΩ ± 3 % B constant = 3,460 kΩ ± 2 %

Rt = 15 exp {3,460 (–––––– – ––––)}

0 °C: 15 kΩ 10 °C: 9.7 kΩ 20 °C: 6.4 kΩ 25 °C: 5.3 kΩ 30 °C: 4.3 kΩ 40 °C: 3.1 kΩ

273 + t 273

Resistance

High temperature thermistor Thermistor <Discharge temperature detection> (TH2)

Thermistor (Discharge temperature detection) (TH2) Thermistor R120 = 7.465 kΩ ± 2 % B constant = 4,057 kΩ ± 2 %

Rt = 7.465 exp {4,057 (–––––– – ––––)}

20 °C: 250 kΩ 70 °C: 34 kΩ 30 °C: 160 kΩ 80 °C: 24 kΩ 40 °C: 104 kΩ 90 °C: 17.5 kΩ 50 °C: 70 kΩ 100 °C: 13.0 kΩ 60 °C: 48 kΩ 110 °C: 9.8 kΩ

273 + t 393

Temperature

Resistance

Temperature

-20 -10 10 20 30 40 50 600

90 100 110 120

Page 40

–38–

[6] Troubleshooting of each part

(1) LEV

1) Overview of LEV operation LEV (electronic expansion valve) receives pulse signals from the outdoor unit main circuit board and drives a valve by means of a servomotor. The valve opening angle changes in proportion to the number of pulses. <Outdoor controller board and LEV>

The output pulses change in the following order: Valve closing 1 → 2 → 3 → 4 → 1 Valve opening 4 → 3 → 2 → 1 → 4 *1. When the LEV opening angle is not changed, all output

phases turn OFF.

2. When the output misses a phase or remains ON, the motor cannot rotate smoothly and makes a clacking sound and vibrates.

White

Red

Orange

Blue

Brown

Yellow

Brown

Red

Blue

Yellow

White

Connector Outdoor controller board CN40

Drive circuit

Output (phase)

No.

ø1 ø2 ø3 ø4

Output state

1234 ON OFF OFF ON ON ON OFF OFF

OFF ON ON OFF OFF OFF ON ON

LEV opening and closing operations

* When the power is turned on, to register the valve posi-

tion, a 2200 pulses valve close signal is output and is always set to point A .

If the valve moves smoothly, the LEV will not generate a sound or vibration, but at E → A and when the valve is locked, a sound louder than the sound generated by missing phase, etc. will be generated.

* Generation of sound can be checked by placing the tip of

a screwdriver against the valve and your ear against the handle.

Valve opening angle (flow)

Valve closing

Valve opening

Increased throttling region (80 - 100 pulses)

Full open 2000 pulses

Pulse count

Page 41

–39–

2) Judgment method and probable trouble mode

3) Electronic expansion valve motor replacement instructions

1. Description of construction

1.1 A lock nut connects the motor to the valve body.

1.2 The motor consists of a motor rotating section, rotation transmission gear section, and a driver which converts rotation to linear motion.

1.3 The valve body consists of a valve assembly, which moves up and down, and an orifice. A bellows at the top of the valve body block isolates the refrigerant circuit from the atmosphere side. Therefore, the motor is not exposed to the refrigerant.

2. Principle of operation

2.1 Pulses output from the control circuit board are sequentially supplied to four coils and the motor is rotated. The motor can be rotated in either clockwise or counterclockwise by changing the order in which the pulses are supplied.

2.2 The gear section reduces the motor speed to 1/30 and supplies the motor rotation to the motor output shaft.

2.3 The motor output shaft is threaded and is used as a driver.

2.4 The up and down motion of the end of the driver moves the valve assembly of the valve body up and down and controls the flow by changing the distance between the orifice and the bottom end of the valve.

Trouble mode

Microcomputer drive circuit faulty

LEV mechanism locked

LEV motor coil open or shorted

Connector connection incorrect, or contact faulty

Judgment method

(1)Disconnect the control circuit board connector, and con-

nect the check LED shown below.

When the mains power is turned on, a pulse signal is output for 10 seconds. If the LED remains OFF or ON, the drive circuit is abnormal. (1)When the LEV is in the locked state and driven, the mo-

tor races. At this time, a soft clicking sound is generated. When this sound is generated both when closing and

when opening, the mechanism is abnormal. Measure the resistance between the coils (red-white, redorange, brown-yellow, brown-blue) with a multimeter. If 150 Ω ±10%, the coil is normal. (1)Visually check for loose connector terminals and check

the color of the lead wires.

(2) Disconnect the control circuit board connector and

check the continuity with a multimeter.

Remedy

When drive circuit is faulty, replace control circuit board.

Replace LEV

Replace LEV coil

Check continuity of faulty point

Valve assembly

Motor

Driver

Lock nut

Refrigerant circuit

alve

body

Orifice

Bellows

Page 42

–40–

3. Work precautions

3.1 Do not apply abnormal force to the motor.

3.2 Do not use a motor that has been dropped.

3.3 Do not remove the cap until immediately before starting work.

3.4 Do not wipe off the molybdenum.

3.5 Do not remove the packing.

3.6 Do not coat the lock nut with a substance other than the specified lock tight, grease, etc.

4. Replacement instructions

4.1 Stop the air conditioner from the remote controller. After confirming that the air conditioner has stopped, turn off the outdoor unit power.

4.2 Get two wrenches. Hold the flat part of the body with one wrench and loosen the lock nut with the other wrench. The lock nut loosens when turned counterclockwise as viewed from the motor. Always use two wrenches. Do not hold the motor with one hand and try to loosen the lock nut with only one wrench.

4.3 When the lock nut is turned several turns, it will disengage from the threads and the motor can be removed.

4.4 Get the replacement motor. The replacement motor is limited to a motor whose driver end position has been set at the factory for replacement use. (The driver end of factory set parts does not stick out.) Use of a motor whose driver end position is not set is related to erroneous valve flow control or no operation.

4.5 During replacement work, be sure that dirt, foreign matter, or water does not enter the part where the motor and valve body separate. (Since the part exposed by separation corresponds to the mechanical part of the valve.) Do not damage the connecting part with the tools. After removing the motor, 1

blow out the body bellows section with N2 gas, etc. to remove the water clinging to the inside and 2 after fan stop processing of the pertinent unit in the motor removed state, dry the bellows section by performing the cooling operation for 30 minutes.

4.6 Remove the cap of the replacement motor and butt the bottom of the motor against the top of the valve body and hold it so that both are aligned and connect the motor to the valve body with the lock nut.

Coat the entire periphery of the threaded part with screw lock. Be sure that the screw lock does not enter the interior. If a defect occurs during replacement work, do not use the motor, instead use a new replacement motor.

4.7 After tightening the lock nut 2 to 3 turns by hand, hold the flat part of the body with one wrench and tighten to the prescribed torque with a torque wrench. Tighten to a torque of 15N·m (150kgf·cm) (Control value 15 ±1N·m (150 ± 10 kgf·cm)) If tightened too tight, the flare nut may break during use.

4.8 When tightening the lock nut, hold the motor with your hand, etc. so that strong rotation torque and bending load are not applied.

4.9 The difference of the relative positions of the motor and body after assembly has no affect on the valve control and open/close mechanism. Do not try to forcefully position the motor and valve body to correct “displacement” after tightening of the lock nut due to the difference in the positional relationship between the motor and valve body before and after assembly.

Fixing with the clip may be impossible due to motor section deformation, but fixing of the piping is sufficient and fixing by clip is unnecessary.

4.10 Connect the connector. At this time, be sure not to pull the lead wires forcefully. Also, firmly insert the connector up to the lock and check that it cannot not be easily disconnected.

4.11Turn on the outdoor unit power and operate the air conditioner from the remote controller and confirm that there are no abnormalities.

Rotation direction “displacement” is OK.

Motor

Packing

Molybdenum

Cap

Page 43

–41–

[7] Emergency operation

1) When the following check displays occur at the outdoor unit, or when the wired remote controller or indoor unit microcomputer fails, if there are no other defects, emergency operation is possible by shorting the connector (CN31) on the outdoor controller board.

• Abnormalities that allow emergency operation

2) Check items and precautions when performing emergency operation a) In addition to the abnormalities above, check the outdoor unit for any abnormalities. (When there is an abnor-

mality other than the above, emergency operation is impossible.)

b) Check the operating range. (For U4 display)

Since the outdoor fan always operates at full speed at emergency operation, do not operate the air conditioner outside the range shown below.

Operation outside this range may cause compressor trouble.

c) When performing emergency operation, set the outdoor unit after setting the emergency operation switch (SWE)

on the indoor controller board. For the indoor emergency operation method, refer to the indoor unit wiring diagram.

d) A power failure causes emergency operation to become continuous operation. ON/OFF, temperature adjust-

ment and other operations cannot be performed from the remote controller. (When a PEH-RP200MYA or RP250MYA indoor unit is connected, check that the special indoor unit power is turned on, then start emergency operation.)

e) Since cool air is discharged from the indoor unit, when the outdoor unit starts the defrosting operation during

heating emergency operation, do not operate the air conditioner for a long time. f) You can perform cooling emergency operation up to 10 hours. The indoor unit heat exchanger may freeze. g) At the end of emergency operation, always return the switch settings, etc. to their original state.

3) Emergency operation contents a) The operation mode operates according to the contents set (cooling or heating) by SW4-2. b) The fan operation condition is always 100% operation. c) The operation mode display flashes every other second.

Display Check contents

Liquid temp thermistor (TH1) open or shorted

Condenser/evaporater temp thermistor (TH3) open or shorted E8 Indoor-outdoor communication receive abnormal (outdoor unit) E9 Indoor-outdoor communication send abnormal (outdoor unit)

E0 - E7 Communication other than outdoor unit abnormal

Operation range (outdoor unit intake temperature)

Cooling geater than 20 °C

Heating less than 10 °

Page 44

–42–

4) Emergency operation method

* Before starting, recheck that the trouble allows

emergency operation.

*1 Only when PEH-RP200, RP250, P400, P500MYA indoor

unit connected.

*1. When PEH-RP200, RP250, P400, P500MYA indoor unit

is connected, first turn off the outdoor unit power, then turn off the indoor unit power.

Emergency operation release method

Start

Piping work complete?

YES

Check that mains power is OFF

Turn on emergency operation switch (SWE) on indoor controller board

Short CN31 (emergency operation connector) on outdoor controller board

Set operation mode (cooling or heating) with SW4-2 on outdoor board (SW4-1 not used)

SW4

OFF ON

Cooling Heating

Turn on indoor power *1

Turn on mains power

Check that emergency operation starts, and that operation mode display flashes

Turn off mains power. (Outdoor, indoor) *1

Turn off emergency operation switch (SWE) on indoor controller board

Open CN31 (emergency operation connector) on outdoor controller board

Set SW4-2 as shown below

SW4

Turn on mains power

OFF ON

Page 45

–43–

[8] Self-diagnosis and troubleshooting

Abnormality display

None

Meaning of abnormality display and abnormality troubleshooting

Indoor/outdoor connection erroneous wiring, too many indoor units (5 or more)

1. Outdoor controller board automatically recognizes the number of connected indoor units. However, when the number of connected indoor units cannot be set due to erroneous indoor/outdoor connection, erroneous wiring, etc. even after 4 minutes have elapsed since the power was turned on, an abnormality is recognized.

2. When the outdoor controller board identified “5 or more” connected indoor units, an abnormality is recognized.

Indoor/outdoor connection erroneous wiring

The outdoor controller board automatically sets the unit No. of the indoor units. However, when the unit No. of the indoor units cannot be set due to indoor/outdoor connection erroneous wiring even after 4 minutes has elapsed since the power was turned on, an abnormality is recognized.

Start-up time over

When start-up processing does not end even through 4 minutes has elapsed since the power was turned on, an abnormality is recognized.

Reverse phase detected

Missing phase detected

Cause

(1) Voltage not applied to outdoor unit ter-

minal block TB1.

a. Power supply circuit breaker not

closed.

b. Power supply terminals connection

faulty, or disconnected.

c. Missing phase (R or S phase)

(2) No electricity at controller board power

supply connector.

a. Power supply connector contact

faulty.

b. Te r minal R/1 or S/2 on controller

board disconnected.

(3) Outdoor unit controller board faulty.

a. Blown fuse on controller board. b. Part faulty.

(1) Indoor/outdoor connection wire con-

tact faulty or erroneous wiring.

(2) Indoor/outdoor connection wire diam-

eter or wiring length outside specification.

(3) Five or more indoor units connected

to outdoor unit.

(4) Outdoor controller board send/receive

circuit faulty.

(5) Indoor controller board send/receive

circuit faulty.

(6) Noise has entered on power supply

or indoor/outdoor connection wire.

(1) Indoor/outdoor connection wire con-

tact faulty, or erroneous wiring.

(2) Indoor/outdoor connection wire diam-

eter or wiring length outside specification.

(3) Outdoor controller board send/receive

circuit faulty.

(4) Indoor controller board send/receive

circuit faulty.

(5) Noise has entered on power supply

or indoor/outdoor connection wire.

(1) Indoor/outdoor connection wire con-

tact faulty.

(2) Indoor/outdoor connection wire diam-

eter or wiring length outside specification.

(3) Noise has entered on power supply

or indoor/outdoor connection wire.

Power supply reverse phase connection.

Power supply missing phase.

Judgment method and remedy

(1)

a. Check power supply circuit breaker. b. Check power supply terminal block

connections.

c. Check power supply terminal block

connections.

(2)

a. Check power supply connector board

connections.

(3)

a. Replace fuse. b. Replace controller board.

(However, when cannot be repaired even through the check above was carried out.)

(1) Check if indoor unit or outdoor unit in-

door/outdoor connection wire disconnected or loose. Also check polarity.

(2) Check indoor/outdoor wire diameter

and wiring length. Outdoor-indoor: Max. 50m Indoor-indoor (span): Max. 30m Also check that VVF and other flat cables are connected in S1, S2, S3 order. (S2 in the middle)

(3) Check number of indoor units con-

nected to outdoor unit.

(4) Check by turning power off and on.

If abnormality is displayed again, replace outdoor controller board or indoor controller board.

* LED3 of the indoor controller board

flashes when communication is being performed.

(1) Check power supply terminal block

connections.

(2) Replace controller board

(However, when cannot be repaired even though check above was carried out.)

Page 46

–44–

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Discharge temperature abnormal

When the discharge thermistor temperature (TH2) exceeds 118 °C while the compressor is operating, an abnormality is recognized.

49C trip (CN23 connector disconnected)

When connector CN23 opens while the compressor is operating, an abnormality is recognized.

Discharge temp thermistor (TH2) open or shorted.

When an open (0 °C or lower) or short (216 °C or higher) is detected while the compressor is operating, an abnormality is recognized. (Detection is disabled for 5 minutes at compressor starting.)

Liquid temp thermistor (TH1) or condenser/evaporater temp thermistor (TH3) open or shorted.

When an open (-39 °C or lower) or short (88 °C or higher) is detected while the compressor is operating, an abnormality is recognized. (Detection is disabled for 7 minutes beginning from 10 seconds after the compressor starts and for 10 minutes after return from defrosting.)

Compressor overcurrent trip

When the current value reaches the overload set value or higher while the compressor is operating, an abnormality is recognized.

P200MYA ..............................

..............................

22 A

P250MYA 27 A

High pressure abnormal (63H1 trip)

Detected (3.3

-0.15

MPa) by 63H1 trip

while compressor is operating.

63H1: Pressure switch (high pres-

sure)

OFF: 3.3 MPa

Cause

(1) Compressor overheating due to insuf-

ficient refrigerant.

(2) Thermistor faulty. (TH2) (3) Outdoor controller board faulty.

(1) Shorting connector CN23 on outdoor

controller board dislodged or contact faulty.

(1) Connector (CN3) dislodged or con-

nect faulty.

(2) Thermistor faulty.

(3) Outdoor controller board faulty.

(1) Connector (TH1: CN2, TH3: CN4) dis-

lodged or contact faulty.

(2) Thermistor faulty.

(3) Outdoor controller board faulty.

(1) Overload operation exceeding unit us-

age range limit. (2) Power supply terminal voltage low. (3) Power supply missing phase. (4) Compressor motor faulty. (5) Compressor locked. (6) Connector (CN22) on outdoor control-

ler board dislodged or contact faulty. (7) 51C disconnected or contact faulty.

(1) Started with ball valve closed. (2) Connector (CN21) on outdoor control-

ler board dislodged or contact faulty. (3) 63H1 disconnected or contact faulty. (4) Indoor filter clogged. Power reset de-

tected during heating overload opera-

tion (Heating). (5) Low indoor unit air flow (heating). (6) Low outdoor unit air flow (cooling). (7) Part faulty.

Judgment method and remedy

(1) Check input super heat.

Check for refrigerant leakage and check piping length. Charge with additional refrigerant.

(2)(3)

Turn off power and restart operation and check if U3 is displayed within 8 minutes. When U3 is displayed, carry out U3 processing. (Do not replace board at U2 display only.)

(1) Repair shorting connector.

(1) Check connector contact and ther-

mistor wire.

(2) Check thermistor resistance value, or

check temperature by microcomputer. (Check using SW2 self-diagnosis function.) See page 37.

(3) Replace outdoor controller board.

(Replace board after sufficiently checking 1 and 2.)

(1) Check connector contact and ther-

mistor wire.

(2) Check thermistor resistance value or

check temperature by microcomputer. (Check using SW2 self-diagnosis function.) See to page 37.

(3) Replace outdoor controller board.

(Replace board after sufficiently checking 1 and 2)

(1) Check usage conditions.

(Check for short cycle operation.) (2) Check power supply voltage. (3) Check wiring for breaks and faulty con-

tact. (4) Check motor winding resistance (See

page 36.) (5) Replace compressor. (6)(7)

After checking connections, restart and

check operation.

(1) Check if ball valve is fully open. (2)(3)

Repair connector. (4) Check indoor filter. (5) Check flow duct static pressure and for

faulty fan motor. (6) Check for faulty outdoor fan motor. (7)

Replace pressure switch.

Page 47

–45–

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Low pressure abnormal (63L trip)

Detected by tripping of 63L while the compressor is operating. (Ignored during defrosting and for 10 minutes at defrosting return.) 63L: Pressure switch (low pressure) OFF: 0 MPa

Remote controller communications receive abnormal (remote controller).

1) When transmission from refrigerant address “0” IC is not received normally even once in 3 minutes, an abnormality is recognized.

2) When a sub remote controller does not receive even one signal in 2 minutes, an abnormality is recognized.

Remote controller communication send abnormal (remote controller)

1) When the remote controller can not confirm that the transmission circuit is idle in 6 seconds, an abnormality is recognized.

2) When the remote controller cannot complete 30 continuous transmissions, an abnormality is recognized.

Indoor-outdoor communication receive abnormal (Outdoor unit)

When the outdoor controller can not receive normally even once in 3 minutes, an abnormality is recognized.

Indoor-outdoor communication send abnormal (Outdoor unit)

1) When the outdoor controller detectes reception of 30 consecutive “0” even through “1” was received, an abnormality is recognized.

2) When the outdoor controller can not confirm that the transmission circuit is idle in 3 minutes, an error is recognized.

Check code undefined

Displayed when an undefined check code is received.

Cause

(1) Started with ball valve closed. (2) Connector (CN27) on outdoor control-

ler board open or contact faulty. (3) 63L disconnected or contact faulty. (4) Part faulty.

(1) Remote controller send/receive

circuit faulty. (2) Refrigerant address “0” indoor control-

ler board send/receive circuit faulty. (3) Noise entered on remote controller

transmission line.

(1) Remote controller send/receive circuit

faulty. (2) Noise entered on remote controller

transmission line.

(1) Indoor/outdoor connection wire con-

tact faulty. (2) Outdoor controller board send/receive

circuit faulty. (3) Indoor controller board send/receive

circuit faulty. (4) Noise entered on indoor/outdoor con-

nection wire.

(1) Outdoor controller board send/receive

circuit faulty. (2) Noise entered at power supply. (3) Noise entered on indoor/outdoor con-

nection wire.

(1) Noise entered on remote controller

transmission line. (2) Noise entered on indoor/outdoor con-

nection wire.

Judgment method and remedy

(1) Check if ball valve fully open. (2)(3) Repair connector.

(4) Replace pressure switch.

Perform remote controller diagnosis. Ta ke the following action based on the diagnosed result: a) [RC OK] display

Remote controller normal. Turn power off and on and check. If “H0” remains on for 4 minutes or longer, replace indoor controller board.

b) [RC NG] display

Replace remote controller.

c) [RC E3] display

[ERC00-66]

(1) Check for disconnected or loose indoor

unit or outdoor unit indoor/outdoor connection wire.

(2)~(4)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor controller board.

(1)(2)(3)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor controller board.

(1)(2)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor controller board.

Noise, etc. probable

cause.

  

Page 48

–46–

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Intake sensor abnormal

1) If thermistor open or short is detected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry, and heat operations. Short: 90 °C or higher Open: -40 °C or lower

Piping sensor abnormal

1) If thermistor short or open is detected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry, and heat (except during defrosting) operation. Short: 90 °C or higher Open: -40 °C or lower

Drain sensor abnormal

1) If thermistor short or open continuously detected for 30 seconds, the compressor enters the check mode and turns off and the indoor fan turns off.

2) When another short or open is continuously detected for 30 seconds in the check mode, an abnormality is recognized. (If returned, returns to normal operation.)

3) Always detected during cool, dry, and drain pump operation. Short: 90 °C or higher Open: -20 °C or lower

Cause

(1) Thermistor characteristics faulty. (2) Connector contact faulty.

(Insertion faulty)

(3) Thermistor wiring open or contact

faulty.

(4) Indoor controller board faulty.

(1) Thermistor characteristics faulty. (2) Connector contact faulty.

(Insertion faulty)

(3) Thermistor wiring open or contact

faulty.

(4) Faulty refrigerant circuit, etc. has

caused thermistor temperature to rise to 90 °C or higher or drop to -40 °C or lower.

(5) Indoor controller board faulty.

(1) Thermistor characteristics faulty. (2) Connector contact faulty.

(Insertion faulty)

(3) Drain sensor wiring open or contact

faulty.

(4) Indoor controller board faulty.

Judgment method and remedy

(1)~(3)

Check thermistor resistance value

0 °C ...... 15.0 kΩ

10 °C ........ 9.7 kΩ

20 °C ........ 6.4 kΩ

30 °C ........ 5.3 kΩ

40 °C ........ 3.1 kΩ

Open or faulty contact can be detected by applying force (pulling, bending) to lead wire while measuring thermistor resistance.

(2) Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Check remote controller room tempera-

ture display. If there is a difference between actual room temperature and displayed room temperature after checking that there are no problems at (1)~(3), replace indoor controller board. If there are no problems above, there are no abnormalities. Turn power off and on and operate.

(1)~(3)

Check thermistor resistance value. For characteristic, see above (P1).

(2) Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Operate in trail run mode and check

piping temperature with remote controller. When piping temperature is abnormally low (cooling) or high (heating), refrigerant circuit is probably faulty.

(5) Check test run mode piping tempera-

ture with remote controller. If there is a difference between actual piping temperature and displayed piping temperature when there are no abnormalities at (1)~(4), replace indoor controller board. If there is no problem above, there are no abnormalities. Turn on power and operate.

(1)~(3)

Check thermistor resistance value.

0 °C .... 6.0 kΩ

10 °C .... 3.9 kΩ

20 °C .... 2.6 kΩ

30 °C .... 1.8 kΩ

40 °C .... 1.3 kΩ

(2) Check connector for faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor controller board. If there are no problems above, there are no abnormalities. T

urn on power and operate.

Page 49

–47–

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Drain overflow protection operation

1) When the drain sensor thermistor overheats and the temperature rise is small, the compressor enters the check mode and is turned off and the indoor fan is turned off.

2) If the state above is detected again in the check mode, drain pump abnormality is recognized.

3) Always detected during drain pump operation.

Water leakage abnormality (PDH only)

1) When the drain sensor thermistor overheats and the temperature rise is small, the compressor enters the check mode and the drain pump is turned on for 6 minutes. (Detection: 1 time/hour)

2) If the state above is detected again within 12 hours after the check mode was entered, a water leakage abnormality is recognized.

3) Detected during stop, fan, and heat operation.

Freezing/excessive rise protection operation

1) Freezing protection When the piping temperature remains at -15 °C or lower for 3 minutes after 3 minutes have elapsed since the compressor started, the compressor enters the 6 minutes restart prohibit mode and if the piping temperature again remains at -15 °C for 3 minutes within 16 minutes after 6 minutes restarting, an abnormality is recognized.

2) Excessive rise protection When a piping temperature rise to 70 °C or higher is detected after the compressor starts, the compressor enters the 6 minutes restart prohibit mode. If a piping temperature rise up to 70 °C or higher is detected again within 10 minutes after 6 minutes restarting, an abnormality is recognized.

Cause

(1) Drain pump trouble. (2) Drain faulty.

Drain pump clogged. Drain pipe clogged.

(3) Water droplets on drain sensor.

Drain water waves created by transmission of drain water from lead wire, clogged filter, etc.

(4) Indoor controller board faulty.

(1) Water leaking from humidifier water

supply pipe. (2) Water droplets on drain sensor. (3) Indoor controller board faulty.

<Cool and dry> (1) Filter is clogged (insufficient air flow). (2) Air duct short cycle. (3) Low load operation (low temperature)

exceeding allowable range. (4) Indoor fan motor faulty. (5) Outdoor fan control faulty (intermedi-

ate period, winter). (6) Refrigerant overcharged. (7) Refrigerant circuit faulty (clogged).

<Heat> (1) Filter clogged (insufficient air flow) (2) Air duct short cycle. (3) Overload operation (high tempera-

ture) exceeding allowable range. (4) Indoor fan motor faulty. (5) Outdoor fan control faulty (intermedi-

ate period) (6) Refrigerant overcharged. (7) Refrigerant circuit faulty (clogged) (8) Outdoor unit bypass circuit faulty.

Judgment method and remedy

(1) Check drain up mechanism. (2) Check drain characteristic. (3) Check drain sensor lead wire arrange-

ment and check for filter clogging.

(4) If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor controller board. If there are no problems above, there are no abnormalities. Turn on the power and operate.

(1) Repair water leakage. (2) Check drain sensor lead wire arrange-

ment and check for filter clogging.

(3) If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor controller board. If there are no problems above, there are no abnormalities. Turn on power and operate.

<Cool and dry> (1) Check filter for clogging. (2) Remove obstruction. (4) Check fan motor operation and wind-

ing resistance. (5) Check outdoor fan motor operation. (6)(7)

Check refrigerant circuit operation.

<Heat> (1) Check filter for clogging. (2) Remove obstruction. (4) Check fan motor operation and wind-

ing resistance. (5) Check outdoor fan motor operation. (6)~(8)

Check refrigerant circuit operation.

Page 50

–48–

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Piping temperature abnormal

<Cool> When the piping temperature stays outside the cooling area for 1 minute after 3 minutes have elapsed since the compressor was started, the indoor fan operates at low speed. If the piping temperature does not return to the cooling area after 5 minutes operation at low speed, an abnormality is recognized. Note 1) It takes a minimum of 9 min-

utes for an abnormality to be detected.

Note 2) At dry operation, P8 abnor-

mality is not detected. <Heat> When the piping temperature falls outside the heating area and enters the ventilation area after compressor operation and the end of hot adjust, the indoor fan stops and the piping temperature does not return to the heating area within 20 minutes after 10 seconds have elapsed after it left the heating area, an abnormality is recognized. Note 3) It takes a minimum of 22

minutes and a maximum of

27 minutes for an abnormal-

ity to be detected. Note 4) Except during defrosting

(Detected again after de-

frosting return.)

Remote control communication receive abnormal

1) When the indoor controller board

can not receive data normally from the remote controller or another indoor controller board even once in 3 minutes, an abnormality is recognized.

2) When the indoor controller board

can not receive signals even once in 2 minutes, an abnormality is recognized.

Cause

(1) Indoor intake piping thermistor tem-

perature differential small.

- EInsufficient refrigerant

- EPiping thermistor holder dislodged.

- ERefrigerant circuit faulty.

(2) Extension piping (When multiple units

connected).

(3) Indoor/outdoor connection wire

(When multiple units connected).

(4) Indoor intake piping thermistor detec-

tion faulty.

(1) Remote controller transmission line

contact faulty.

(2) All remote controllers set as “sub”

remote controller.

(3) Remote controller send/receive circuit

faulty.

(4) Indoor controller board send/receive

circuit faulty.

(5) Noise entered on remote controller

transmission line.

Judgment method and remedy

(1) Operate in test run mode and check

piping temperature.

(2)(3)

Check extension piping or indoor/outdoor connection wire.

(4) Check remote controller room tempera-

ture display and piping temperature in test run mode.

(1) Check if indoor unit or remote control-

ler transmission line disconnected or loose.

(2) Set one remote controller as “main”.

When there are no problems at the

above (3) Perform remote controller diagnosis. a) [RC OK] display

Remote controller normal. Check by turning power off and on. If the abnormality occurs again, replace indoor controller board.

b) [RC NG] display

Replace remote controller.

c) [RC E3] display

[ERC00-66] noise, etc. is probable cause.

Page 51

Normal boot-up completed.

No error occurs, therefore no countermeasures

possible.

No error occurs, therefore no countermeasures

possible.

No error occurs, therefore no countermeasures

possible.

Normal stoppage

No power to remote controller and so

inoperable.

Error can be confirmed at outdoor unit LED.

(1) Repair cable C Communication error detected at No.1 and No.2

system indoor unit due to remote controller

error, however, no error reported at remote

controller as inoperable during stoppage.

The outdoor unit for address 00 is no longer

connected to the system, and operation is not

possible as there is no power supply to the

remote controller. Error can be confirmed at

outdoor unit LED.

(1) Repair cable A.

[Emergency Repair]

(1)

Set to the No.2 address 00 and cut the power

to the No.1 outdoor unit. (single system

operation.) Change No.1 address to 01.

The outdoor unit for address 00 is no longer

connected to the system, and operation is not

possible as there is no power supply to the

remote controller, resulting in an error.

Unable to boot up system No.2 and error

detected at both the outdoor and indoor unit,

however, the remote controller cannot be used

during the stoppage, and therefore no error is

indicated. Error can be confirmed at outdoor unit

LED.

(No.1 system has booted up and therefore

operation is possible.)

(1) Repair cable B.

[Emergency Repair]

(1) Cut power to outdoor unit No.2.

Single system operation.

Error detected at both No.2 outdoor and indoor

unit, however, the remote controller cannot be

used during the stoppage, and therefore no

error is indicated.

Communication error detected at No.2 system

indoor unit, however, no error reported at

remote controller when D breakage occurs.

Error can be confirmed at outdoor unit LED.

(No.1 system has booted up and therefore

operation is possible.)

(1) Repair cable D Communication error detected at No.2 system

indoor unit, however, no error reported at

remote controller when D breakage occurs. No.2

system cannot be operated.

No error occurs, therefore no countermeasures

possible.

No error occurs, therefore no countermeasures

possible.

No error occurs, therefore no countermeasures

possible.

(1) Repair cable C

(1) Repair cable A.

[Emergency Repair]

(1)

Set to the No.2 address 00 and cut the power

to the No.1 outdoor unit. (single system

operation.) Change No.1 address to 01.

(1) Repair cable B.

[Emergency Repair]

(1) Cut power to outdoor unit No.2.

Single system operation.

(1) Repair cable C

Error Details Recommended Countermeasure Error Details Recommended Countermeasure

No No.1 system stoppage.

No.2 system error stoppage.

Remote controller indicates error, however,

remote controller operation is not possible other

than at stoppage. (Fan stoppage.)

No No.1 system stoppage.

No.2 system error stoppage.

Remote controller indicates error, however,

remote controller operation is not possible other

than at stoppage. (No fan stoppage.)

No.1 system error stoppage.

No No.2 system stoppage.

Remote controller indicates error, however,

remote controller operation is not possible other

than at stoppage. (No fan stoppage.)

Correct cause of error.

Communication error detected at No.1 and No.2

system indoor unit due to remote controller

error, and all systems stopped.

(1) Repair cable C

The outdoor unit for address 00 is no longer

connected to the system, and operation is not

possible as there is no power supply to the

remote controller, resulting in an error.

(1) Repair cable A.

[Emergency Repair]

(1) Set to the No.2 address and cut the power to

the No.1 outdoor unit. (single system

operation.) Change No.1 address to 01.

Error occurred at both No.2 system outdoor and

indoor unit and error occurs at remote controller.

Operation can be continued as no error has

occurred at system No.1, however, remote

controller operation is not possible other than at

stoppage. (No fan stoppage.)

(1) Repair cable B.

[Emergency Repair]

(1) Cut power to outdoor unit No.2.

Single system operation.

Communication error detected at No.2 system

indoor unit, however, no error reported at

remote controller when D breakage occurs.

Communication error detected at No.2 system

indoor unit, resulting in stoppage.

(1) Repair cable C

Error Details Recommended Countermeasure

Prior to power ON to boot-up Stoppage (power supplied) During Operation

Cable A

breakage,

reverse

connection

Wiring Errors

Cable B

breakage,

reverse

connection

Cable C

breakage,

reverse

connection

Cable D

breakage,

reverse

connection

No.1 system

error

No.2 system

error

51F error

Refrigerant

Related Errors

No. 1 system indoor/outdoor unit transmission cable.

No. 2 system indoor/outdoor unit transmission cable.

Remote controller cable for board No.1 (communication of operation and control details).

Cable connecting No.1 and No.2 board (communication of operation and control details)

* Error countermeasures for PEH-P400·500MYA

Remote controller

Indoor unit

No.2 board

Outdoor unit No.1

Address: 00

Outdoor unit No.2

Address: 01

No.1 board

:::

–49–

Page 52

–50–

Symptom and operation when normal

1. No remote controller display

2. Remote controller displays “PLEASE WAIT” unchanged.

3. When remote controller operation switch pressed, operation display appears but immediately disappears.

4. Does not beep and air conditioner does not operate even when operated with wireless remote controller. (Operation display appears on wireless remote controller.)

5. When operated with wireless remote controller, beeps but does not operate.

6. Remote controller display is normal and cooling operation is performed, but without any capacity (does not cool).

Cause

(1) DC14V is not supplied to remote con-

troller. (No power O display on liquid crystal panel.)

(2) DC14V is supplied to remote controller

but nothing is displayed.

- “PLEASE WAIT” not displayed

- “PLEASE WAIT” displayed

(1) Remote controller displays “PLEASE

WAIT” for maximum of 2 minutes for starting after power turned on.

(2) Indoor-remote controller communication

faulty.

(3) Outdoor-indoor communication faulty.

(1) Operation switch is disabled for approxi-

mately 30 seconds after function select operation from remote controller is released.

(1) Wireless remote controller and indoor

controller board pair number setting mismatched.

(2) Cause of item 1.

(1) Air conditioner does not operate for a

maximum of 2 minutes after the power is turned on.

(2) Set to local operation prohibit mode.

- Remote start/stop adapter is connected to CN32 on indoor controller board.

- Air conditioner is connected to MELANS and is set to local operation prohibit mode from centralized controller, etc.

(3) Cause of item 2.

(1) Insufficient refrigerant. (2) Filter clogged. (3) Outdoor unit heat exchanger clogged. (4) Air duct short cycle. (5) Outdoor unit bypass circuit faulty.

Symptom judgment and remedy

(1) Check LED2 on indoor controller board.

1)Steady light Check remote controller wire open or faulty contact.

2)Flashing Check for remote controller wire short.

3)Not lit Check outdoor controller refrigerant address.

(2) Make the following judgment:

- When “PLEASE WAIT” is not displayed, remote controller is faulty.

When “PLEASE WAIT” is displayed, see item 2.

(1) Normal operation. (2) Remote controller self-diagnosis. (3) When outdoor-indoor cannot communicate

“PLEASE WAIT” is displayed for a maximum 6 minutes. Check LED3 on indoor controller board.

1) Does not flash

Check indoor/outdoor connection cable for erroneous wiring. (S1 and S2 or S3 open)

2) Flashes

Indoor/outdoor connection cable is normal.

(1) Normal operation.

(1) Check pair number setting. (2) Item check of item 1.

(1) Normal operation. (2) Normal operation. (3) Item check of item 2.

(1) - When there is leakage, discharge tempera-

ture rises. Therefore, check by measuring temperature.

- Check for gas leakage from piping connections, etc.

(2) Open intake grille and check filter. Clean filter,

and remove dust and dirt.

(3) - Since both indoor piping temperature and

outlet pressure rise when filter clogged, judge by measuring outlet pressure.

- Clean heat exchanger. (4) Remove obstruction. (5)

Check refrigerant circuit operation state.

Page 53

–51–

Symptom and operation when normal

7. Remote controller display is normal and heating operation is performed

but without any capacity (does no

heat).

Cause

(1) Insufficient refrigerant. (2) Refrigerant piping heat insulation insuf-

ficient. (3) Filter clogged. (4) Indoor unit heat exchanger clogged. (5) Air duct short cycle. (6) Outdoor unit bypass circuit faulty.

Symptom judgment and remedy

(1) - Since the discharge temperature rises when

there is leakage, judge by measuring the temperature.

- Check piping connections, etc. for gas leakage.

(2) Check heat insulation. (3) Open intake grille and check filter.

Clean filter, and remove dust and dirt.

(4) - Since the indoor piping temperature and out-

let pressure rise when the heat exchanger is clogged, judge by measuring the outlet pressure.

- Clean heat exchanger.

(5) Remove obstruction. (6)

Check refrigerant circuit operation state.

Page 54

–52–

Erroneous wiring contents Remarks

Normal

wiring

Open

between S1

Open

between S2

Open

between S3

Remote control-

ler display

“ ” Power

supply mark

No display

Condition

Trial run

(relocation)

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Indoor controller board

LED display

Outdoor controller

board LED display

(after 4 minutes)

LED1

Off

LED2

Off

LED3

Flashing

Off

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Indoor

side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Page 55

–53–

The test run can be carried out either from the outdoor unit or the indoor unit.

1. Check list

• After the installation, piping setup, and wiring of the indoor and outdoor units is complete, check that refrigerant is not leaking, the power and control wires are not loose, and the poles are not reversed. (When connecting model PEH-(R)P-MYA in particular, check that there is current in the separate power supply cable for the indoor unit.)

• Use a 500 V insulation resistance tester to make sure that the resistance between the power terminal and the ground is

1.0 MΩ or more. If it is less than 1.0 MΩ, do not operate the unit. * Absolutely do not touch the tester to indoor/outdoor connection terminals S1, S2, and S3. An accident could occur.

• Make sure there is no malfunction in the outdoor unit. (If there is a malfunction, you can diagnose it using LED1 on the board.)

• Check that the ball valve is fully open on both the liquid and gas ends.

• Check the electrical power phase. If the phase is reversed, the fan may rotate in the wrong direction or stop, or unusual sounds may be produced.

• Starting at least 12 hours before the test run, send current through the crankcase heater. (If the current is running for a shorter period of time, damage to the compressor could result.)

After the above checks are complete, carry out the test run as indicated in the following outline.

2. Starting and finishing the test run

• Procedure from the indoor unit: carry out the test run as in the manual provided with the indoor unit.

• Procedure from the outdoor unit: start and stop the test run and set test run mode (cooling/heating) using the SW4 dip switches on the board.

a) Set test run mode (cooling/heating) using SW 4-2. b) The test run will begin when SW 4-1 is turned ON, according to the mode selected by SW 4-2. c) The test run is stopped when SW 4-1 is turned OFF.

Note: Test run mode cannot be stopped during operation by using SW 4-2. (If the operation mode is to be changed, first stop it using SW 4-1, then after changing the operation mode, start the test run again using SW 4-1.)

• If the 2-hour timer is set, the test run will stop automatically after 2 hours.

• During the test run, the room temperature display on the indoor unit will indicate the temperature of the indoor unit piping.

8 Test run

(1) Test run (For PUH-P200MYA/P250MYA)

cooling

run

<SW4>

heating

1 2

stop

OFF

Page 56

–54–

(2) How to handle problems with the test run (For PUH-P200MYA/P250MYA)

Error code list: details

Error details

Remote controller communication – reception error Remote controller communication – transmission error Remote controller communication – reception error Remote controller communication – transmission error Communication between indoor and outdoor units – reception error Communication between indoor and outdoor units – transmission error Communication between indoor and outdoor units – reception error Communication between indoor and outdoor units – transmission error Indoor/outdoor connection wiring error, indoor unit overload (5 units or more) Indoor/outdoor connection wiring error (interference, loose) Excessive time in use Serial communication error Serial communication error Reverse phase, out of phase verification Faulty input circuit Duplicated M-NET address setting M-NET error in PH/W transmission M-NET bus busy M-NET communication error with P transmission M-NET error – no ACK M-NET error- no response Undefined error code Outlet temperature error CN23 Short-circuit Connector Unplugged Open/short in discharge temp thermistor Open/short in liquid temp or condenser/evaporater temp thermistor Compressor overcurrent interruption (51C operation) High pressure error (63H1 operation) Low pressure error (63L operation) Power synchronous idle circuit error Inlet sensor error Piping sensor error Drain sensor error Drain overflow protector operation Water leak error (PDH only) Freeze prevention operation Surge prevention operation Piping temperature error

MELANS

display 6831,6834 6832,6833 6831,6834 6832,6833 6740,6843 6841,6842 6840,6843 6841,6842

6844

6845 6846 0403 0403 4103 4115 6600 6602 6603 6606 6607 6608

undefined

1102 1108 5104 5105 4101 1302 1300 4115 5101 5102 2503 2502 2500 1503 1504

1110

Remote control-

ler display

E0 E3 E4 E5 E6 E7 E8 E9

EB EC ED EE

A8 EF U2 U2 U3 U4 U6 UE UL

Problem location

Remote Controller Remote Controller

Indoor unit Indoor unit Indoor unit

Indoor unit Outdoor unit Outdoor unit

Outdoor unit

Outdoor unit Outdoor unit Outdoor unit

M-NET board

Outdoor unit Outdoor unit

M-NET board M-NET board M-NET board M-NET board M-NET board M-NET board

– Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit

Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit

Indoor unit

Page 57

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Item

Operation mode/relay output

Outdoor unit control condition

Indoor unit control condition

Error code history 1 Error code history 2

Display contents

tens place O: stop

C: cooling H: heating d: defrosting

units place 1: SV1 Relay output = SV1 + 21S4 + 52C

2: 21S4 4: 52C

Ex. During cooling mode, when 52C and

SV1 are ON: C5 When an error occurs, the error code and error signal (*1) are displayed in alternation. Control mode display system

The error code (ex. U8, UA) and error indicator (*1) are displayed in alternation.

• Depending on the position of the SW2 switch on the outdoor unit board, the segments light up to indicate the running condition of the unit and the particulars of the check code.

SW2 setting

123456 000000

011110

010110

110110

011100 111100

*1 Display system for error indicator

The indicator corresponds to the following numbers

0 .......... Outdoor unit

1 .......... Indoor unit No.1

2 .......... Indoor unit No.2

3 .......... Indoor unit No.3

4 .......... Indoor unit No.4

Indoor unit No.1 Indoor unit No.3 Outdoor unit

Indoor unit No.2 Indoor unit No.4

(IC1) (IC2)

Control mode

Indoor unit

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Freeze prevention

Surge prevention Compressor OFF

Display

0 1 2 3 4 5 6 7

Outdoor unit

←

(IC3) (IC4)

Page 58

New publication, effective Sep.2005

Specifications subject to change without notice.

The Air Conditioning & Refrigeration Systems Works acquired ISO 9001 certification under Series 9000 of the International Standard Organization (ISO) based on a review of quality warranties for the production of refrigeration and air conditioning equipment.

ISO Authorization System The ISO 9000 series is a plant authorization system relating to quality warranties as stipulated by the ISO. ISO 9001 certifies quality warranties based on the “design, development, production, installation and auxiliary services” for products built at an authorized plant.

The Air Conditioning & Refrigeration Systems Works acquired environmental management system standard ISO 14001 certification.

The ISO 14000 series is a set of standards applying to environmental protection set by the International Standard Organization (ISO). ISO 14001 certifies the plant’s environmental protection system and activities.

HEAD OFFICE MITSUBISHI DENKI BLDG. MARUNOUCHI TOKYO 100-0005 TELEX J24532 CABLE MELCO TOKYO

Certificate Number FM33568

Certificate Number EC97J1227

Registered on March 10, 1998

HWE05180

Printed in Malaysia