Mitsubishi PUH-1.6VKA2, PUH-2VKA2, PUH-2.5VKA2, PUH-3VKA2, PUH-3YKA2 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

OUTDOOR UNIT PUH-3K

The Slim Line. From Mitsubishi Electric.

TECHNICAL & SERVICE MANUAL

Outdoor unit [model names] [Service Ref.]

1997

No.OC128

PUH-1.6VKA PUH-1.6VKA PUH-2VKA PUH-2VKA

2

PUH-2.5VKA PUH-2.5VKA PUH-3VKA PUH-3VKA PUH-3YKA PUH-3YKA

2 2

PUH-4YKSA PUH-4YKSA PUH-5YKSA PUH-5YKSA PUH-6YKSA PUH-6YKSA

CONTENTS

1.

2. PART NAMES AND FUNCTIONS·····················3

3. DATA··································································4

4. OUTLINES AND DIMENSIONS························5

5. WIRING DIAGRAM ···········································9

6.

7. DISASSEMBLY PROCEDURE ·······················17

8. PARTS LIST····················································19

9. OPTIONAL PARTS··························Back cover

2

3 3 2

COMBINATION OF INDOOR AND OUTDOOR UNITS

REFRIGERANT SYSTEM DIAGRAM

················16

·····2

1 COMBINATION OF INDOOR AND OUTDOOR UNITS

Indoor unit Outdoor unit

Service Ref.

PLH-GKH(S)B

1

PLH-KKHC PCH-GKH(S)A

1

PEH-EKH(S)A2.TH PKH-FKH(S)A PSH-GJH(S)A

3

1

Service

Manual No.

OC139 OC123 OC135 OC153 OC130 OC142

1.6

VKA

—

— —

—

2

VKA

—

2.5

2

VKA

2

—

VKA

—

3

2

YKA

2

—

4

YKSA

—

5

3

YKSA

3

—

6

YKSA

—

3

2

2 PART NAMES AND FUNCTIONS

PUH-1.6VKA2 PUH-2VKA2

Air intake

Air outlet (Expels warm air during cooling)

PUH-4YKSA3

Air intake

Air outlet

PUH-5YKSA3 PUH-6YKSA2

Air intake

Air outlet

PUH-2.5VKA2 PUH-3YKA2 PUH-3VKA2

Air intake

Air outlet

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR MAXIMUM PIPING LENGTH AT SHIPMENT.

The unique refrigerant circuit and a large accumulator always control the optimal refrigerant level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes problems. Heretofore it is completely eliminated. This unique system improves the quality and reliability of the work done. It also helps to speed up the installation time.

3

3 DATA

1. REFILLING REFRIGERANT CHARGE (R-22 : kg)

Service Ref.

Refrigerant piping length (one way)

PUH-1.6VKA PUH-2VKA PUH-2.5VKA PUH-3VKA PUH-3YKA PUH-4YKSA PUH-5YKSA PUH-6YKSA

5m

2

3

2

1.5

2.1

2.5

3.5

4.7

4.3

10m

1.7

2.3

2.7

3.6

4.8

4.4

15m

1.8

2.4

2.8

3.8

5.0

4.6

20m

1.9

2.5

2.9

3.9

5.1

4.7

25m

2.1

2.7

3.1

4.1

5.3

4.9

30m

2.2

2.8

3.2

4.2

5.4

5.0

35m

2.3

2.9

3.3

4.4

5.6

5.2

40m

2.4

3.0

3.4

4.5

5.7

5.3

2. COMPRESSOR TECHNICAL DATA at 20˚C

Compressor Model

U-V

(

Winding

Resistance

(Ω)

R-C

U-W

(

S-C

W-V

RH247VFC

) )

2.00

4.55 —

NH38VMD

1.05

2.23 —

NH41VMD

1.03

2.22 —

NH52VND

0.83

2.03 —

NH52YDA

3.60

NH56YDA

3.50

45m

— —

3.1

3.6

4.6

5.9

5.5

50m

— —

3.3

3.7

4.8

6.0

5.6

Compressor Model

Winding

Resistance

(Ω)

T1-T2 T2-T3 T3-T1

ZR61K3TFD

2.53-2.91

at 25˚C

ZR68KCTFD

2.31

4

4 OUTLINES AND DIMENSIONS

100 10

1000For 10 units or less

200

Outdoor Unit-Necessary surrounding clearance

(Concentrated installation)

The upper side must be open.

Outdoor Unit-Necessary surrounding clearance

200

10

Note:Allow adequate

upper clearance

150

500

Service space

Front opening

Handle

for moving

138

95

Rear piping hole

23

33

Rear fresh

air intake

Side air intake

7 24(1)295(11-5/8)

Outlet guide

installation hole

302

Air intake

Air outlet

870(34-1/4)

185

(7-9/32)

185

(7-9/32)

500(19-11/16)

330(13)

362(14-1/4)

1715

39.5 27.5 Terminal block for indoor and outdoor unit connection

Terminal block for power line

Handle for moving

77

524

339

282

297

444

650 (25-5/8)

40 60524

Service panel

Ground terminal

Refrigerant-pipe flared

connection

[15.88 3/8F

Refrigerant-pipe flared

connection

[9.52 3/8F

Knock out hole

for front piping

(refrigerant,drainage

and wiring)

Knock out hole

for right piping

(refrigerant,drainage

and wiring)

R

20

R20

60

120

4553

25 max.

Knock out holes for

power line 2-[27

Standard bolt length

65

Front right piping holes-

detail figures

80

17

42

45

12

R6

104

33

Bottom

piping hole

2-U-shaped

notched

holes

Drain hole

2-12✕23 Oval holes

(standard bolt M10)

Handle for moving

PUH-1.6VKA2/PUH-2VKA

2

Unit : mm (inch)

5

PUH-2.5VKA

100 10

1000For 10 units or less

200

Outdoor Unit-Necessary surrounding clearance

(Concentrated installation)

The upper side must be open.

Outdoor Unit-Necessary surrounding clearance

200

10

Note:Allow adequate

upper clearance

150

500

Service space

Front opening

138

95

Rear piping hole

23

33

Rear fresh

air intake

Side air intake

7 24(1)295(11-5/8)

Outlet guide

installation hole

302

Air intake

Air outlet

870(34-1/4)

185

(7-9/32)

185

(7-9/32)

500(19-11/16)

330(13)

362(14-1/4)

1715

39.5 27.5 Terminal block for indoor and outdoor unit connection

Terminal block for power line

Handle for moving

179 524

441

337

352

403

553

850(33-7/16)

40 60524

Service panel

Ground

terminal

Refrigerant-pipe flared

connection [15.88 5/8F

Refrigerant-pipe flared

connection [9.52 3/8F

Knock out hole

for front piping

(refrigerant,drainage

and wiring)

Knock out hole

for right piping

(refrigerant,drainage

and wiring)

R

20

R20

60

120

4553

25 max.

Knock out holes for

power line 2-[27

Standard bolt length

65

Front right piping holes-

detail figures

80

17

42

45

12

R6

104

33

Bottom

piping hole

2-U-shaped

notched

holes

Drain hole

2-12✕23 Oval holes

(standard bolt M10)

Handle for moving

2

PUH-3VKA2/PUH-3YKA

2

Unit : mm (inch)

6

PUH-4YKSA

300

Outdoor Unit-Necessary surrounding clearance

3

Note:Allow adequate

upper clearance

10

Front opening

10

1715

185

(7-9/32)

100

500

Service space

500

10

Terminal block for

indoor and outdoor

unit connection

362(14-1/4)

330(13)

39.5 27.5

Terminal block for power line

Ground

terminal

Service panel

Handle

for moving

Refrigerant-pipe flared

1258(49-1/2)

959

4553

Knock out holes for

60

connection [19.05 3/4F

Refrigerant-pipe flared

connection [9.52 3/8F

Knock out hole

for front piping

403

382

power line 2-[27

120

(refrigerant,drainage

and wiring)

104

R20

20

R

Knock out hole

for right piping

(refrigerant,

57 52

Bottom

39

Unit : mm (inch)

Standard bolt length

25 max.

80

65

Front right piping holes-

17

R6

drainage and wiring)

piping hole

2-U-shaped

notched

holes

detail figures

12

Air intake

500(19-11/16)

185

(7-9/32)

Air intake

300

1000For 10 units or less

The upper side must be open.

870(34-1/4)

302

Air outlet

Outlet guide

7 24(1)295(11-5/8)

installation hole

Side air intake

52461

585

Handle for moving

Rear fresh

air intake

345

2-12✕23 Oval holes

(standard bolt M10)

83 524

40 60524

Drain hole

33

23

Drain hole

Outdoor Unit-Necessary surrounding clearance

(Concentrated installation)

150 10

Handle

for moving

Rear piping hole

95

138

7

PUH-5YKSA3/PUH-6YKSA

150 10

1000For 10 units or less

300

Outdoor Unit-Necessary surrounding clearance

(Concentrated installation)

Outdoor Unit-Necessary surrounding clearance

The upper side must be open.

Handle

for moving

138

95

Rear piping hole

23

33

Rear fresh

air intake

Side air intake

7 24(1)345(13-9/16)

Outlet guide

installation hole

352

Air intake

Air outlet

970(38-3/16)

185

(7-9/32)

185

(7-9/32)

600(23-5/8)

380(14-31/32)

412(16-1/4)

1715

39.5 27.5

Terminal block for

indoor and outdoor

unit connection

Terminal block for power line

300

10

Note:Allow adequate

upper clearance

150

500

Service space

Handle for moving

52461

585

83 524

345

382

403

959

1258(49-1/2)

90 60524

Service panel

Ground

terminal

Handle

for moving

Refrigerant-pipe flared

connection [19.05 3/4F

Refrigerant-pipe flared

connection [9.52 3/8F

Knock out hole

for front piping

(refrigerant,drainage

and wiring)

Knock out hole

for right piping

(refrigerant,

drainage and wiring)

R

20

R20

60

120

4553

25 max.

Knock out holes for

power line 2-[27

Standard bolt length

65

Front right piping holes-

detail figures

80

17

52

57

12

R6

104

39

Bottom

piping hole

2-U-shaped

notched

holes

Drain hole

2-12✕23 Oval holes

(standard bolt M10)

Front opening

2

Unit : mm (inch)

8

5 WIRING DIAGRAM

LD1

LD2

LD3

LD4

LD5

LD6

LD7

LD8

SW1 SW2 SW2

21

OFF ON

O.B

3 2 CN3

CN4T

1

4321

CN4

4321

4

T

YLW ORN BRN

FROOM INDOOR UNIT CONNECTING WIRES 12V DC (polar)

2

1

TB1

L N

3

TB3

LED

BRN 12.3V AC

RED 12.3V AC

RED ORN YLW

220V 230V

240V

POWER SUPPLY ~/N(1phase)

220-240V 50Hz

GRY/YLW

BLK

RED R

T

UWBLU

WHT BLU RED

BLK

RED

52C

C2

MC

R

S

C

21R

RED

SV

✕14

21 S4

21S4

✕13

WHT

BRN

YLW

BLU

WHT

TRF

52C

GRY

52C

✕12

CH ZNR R/1 S/2 T/3

BLU BLU

BLU

✕11

A

S

B

HC

RT

CN2

✕14 ✕13 ✕12 ✕11

4 3 2 1

MF

F

63H1

FC

26C

MF2

63H2

51CM

MF1

S

BLU

RED ORN

WHT

RED

ORN

C1

PUH-1.6VKA

SYMBOL HC C1 C2 FC<O.B F<O.B 21S4 21R LD1~LD8

CRANKCASE HEATER OUTDOOR FAN CAPACITOR COMPRESSOR CAPACITOR

>

FAN CONTROLLER

>

FUSE(6A R.V.COIL B.V.COIL CHECK,SERVICE LED

2

NAME

)

SYMBOL MC MF O.B SW1·2·3<O.B T TB1,3 RT X11<O.B

COMPRESSOR (INNER THERMOSTAT)

NAME

OUTDOOR FAN MOTOR (

INNER THERMOSTAT)

OUTDOOR CONTROLLER BOARD

>

CHECK,SERVICE SELECTOR TRANSFORMER TERMINAL BLOCK

OUTDOOR COIL THERMISTOR (

0˚C/15kΩ,25˚C/5.4kΩ

>

HC RELAY

)

SYMBOL X12<O.B X13<O.B X14<O.B ZNR<O.B 52C 63H1

>

COMPRESSOR RELAY

>

21S4 RELAY

>

21R RELAY

>

VARISTER CONTACTOR HIGH PRESSURE SWITCH

NAME

Main functions of LED

LED No.

LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8

NOTE : If the operation stops and the protection device is functioning, the check display will flash. How to use SW1 and 2

●

Pressing erases the past check contents loaded on the microcomputer.

●

The output display (light) remains lit during operation, but pressing displays the past check contents by a flashing mode. Pressing the switch again returns it to output display (light).

CAUTION FOR SERVICING

●

The connector marked s turns the compressor ON and OFF during servicing. The compressor stops when the white connector is disconnected. See fig.1.

CAUTIONS FOR POWER SUPPLY WIRING

●

Since LD8 lights when normal power is turned ”ON”, check the power supply with the ON or OFF LD8.

❈

Since the indoor transformer (T) is connected with 240V power, using 220V or 230V power will require a wiring connection change. See fig.2.

CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES

●

Since the indoor and outdoor connecting wires have polarity, be sure to connect the same terminal numbers (1,2,3) for the indoor and outdoor units.

(

when both Nos. 1 and 2 of are ”OFF”)

Output display (light Compressor ON command from indoor Heating indoor command 63H1 ON Compressor ON Outdoor fan ON 4-way valve ON Bypass valve ON Crankcase heater ON

SW1

)

SW3

Check display (flash

— —

RT short/open

—

— 26C functions RT overheat protection Defective input

SW2

)

fig. 1 White connector

fig. 2 ❈When power supply is 220V

RED WHITE

220V ORANGE YELLOW

230V

240V

9

PUH-2VKA2/PUH-2.5VKA

SYMBOL

CN3(O.B CN4T(O.B

HC C1 C2 FC(O.B F(O.B

)

LD1-LD8

)

CONNECTING WIRES INDOOR/OUTDOOR CONNECTOR

)

TRANSFORMER CONNECTOR CRANKCASE HEATER OUTDOOR FAN CAPACITOR COMPRESSOR CAPACITOR FAN CONTROLLER FUSE(6,3A CHECK,SERVICE LED

NAME

)

2

SYMBOL MC MF O.B 21R SW1·2·3(O.B T TB1,3 RT X11(O.B

COMPRESSOR (INNER THERMOSTAT) OUTDOOR FAN MOTOR (INNER THERMOSTAT) OUTDOOR CONTROLLER BOARD BYPASS VALVE SOLENOID COIL

)

CHECK,SERVICE SELECT SWITCH TRANSFORMER TERMINAL BLOCK OUTDOOR COIL THERMISTOR

)

HC RELAY

NAME

SYMBOL X12(O.B X13(O.B X14(O.B ZNR(O.B 21S4 52C 63H1

)

MC RELAY

)

21S4 RELAY

)

21R RELAY

)

SURGE ABSORBER 4-WAY VALVE SOLENOID COIL CONTACTOR HIGH PRESSURE SWITCH

NAME

TO INDOOR UNIT CONNECTING WIRES DC 12V

POWER SUPPLY ~/N 220-240V 50Hz

L N

1 2 3

TB3

AC12.3V

TB1

YLW

ORN

BRN

RED

AC

12.3V

BRN BRN

LED

O.B.

SW1 SW2 SW3

21

CN4T

4321

T

LD1

LD2

LD3

LD4

OFF ON

3 2

CN3

1

4

RED

220V

ORN

230V

YLW

240V

RED

BLU

RED BLU

GRN/YLW

LD5

CN2

LD6

RED

WHT WHT

RT

LD7

LD8

SV TRF

RED

21R

4321

✕14 ✕13 ✕12 ✕11

✕14 ✕13

21S4

RED

GRY

21 S4

L3/5

52C

CN4

52C

GRY

52C

A1

A2

T3/6

✕12 ✕11

CH

WHT

HC

BLU

T1/2L1/1

WHT BLU RED

ZNR

C2

63H1

F

RST

BLUBLU

26C

51CM

BRN

BRN 63H1

R

C

MC

S

F.C.

MF2

MF1

S

BLU

C1

BLU

ORN

WHT

3 4 2 1

WHT BLU REDRED ORN

MF

YLW

CAUTIONS FOR POWER SUPPLY WIRING

●

Since LD8 lights when normal power is turned “ON”, check the power supply with the ON or OFF LD8.

❈

Since the transformer (T) is connected with 240V power, if 220V or 230V power is used, change the wiring connection in the following procedure

CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES

●

Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers (1,2,3) for indoor and outdoor units.

❈When power supply is 220V

RED WHITE

220V ORANGE YELLOW

230V

240V

Main functions of LED

LED No.

LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8

(

when both Nos.1 and 2 of are “OFF”

Output display (light

SW3

) Compressor indoor command Heating indoor command 63H1 ON

Compressor ON Outdoor fan ON

4-way valve ON Bypass valve ON Crankcase heater ON

Check display (flash

Outdoor coil thermistor short/open

26C functions RT overheat protection Defective input

)

) — —

— —

NOTE :

If the operation stops to function of the protection device, the check display flashes.

How to use SW1 and 2

●

SW1

Pressing erases the past check contents loaded on the microcomputer. The output display (light) remains during operation but pressing displays the past check contents in flushing mode. Pressing the switch again returns to output display (light).

SW2

10

PUH-3VKA

SYMBOL

CN3(O.B CN4T(O.B

HC C1 C2 FC(O.B F(O.B LD1-LD8

)

CONNECTING WIRES INDOOR/OUTDOOR CONNECTOR

)

TRANSFORMER CONNECTOR CRANKCASE HEATER OUTDOOR FAN CAPACITOR COMPRESSOR CAPACITOR

)

FAN CONTROLLER

)

FUSE(6,3A CHECK,SERVICE LED

2

NAME

)

SYMBOL MC MF O.B 21R SW1·2·3(O.B T TB1,3 RT X11(O.B

)

COMPRESSOR (INNER THERMOSTAT)

NAME

OUTDOOR FAN MOTOR (INNER THERMOSTAT) OUTDOOR CONTROLLER BOARD BYPASS VALVE SOLENOID COIL

)

CHECK,SERVICE SELECT SWITCH TRANSFORMER TERMINAL BLOCK OUTDOOR COIL THERMISTOR HC RELAY

SYMBOL X12(O.B X13(O.B X14(O.B ZNR(O.B 21S4 52C 63H1

)

MC RELAY

)

21S4 RELAY

)

21R RELAY

)

SURGE ABSORBER 4-WAY VALVE SOLENOID COIL CONTACTOR HIGH PRESSURE SWITCH

NAME

TO INDOOR UNIT CONNECTING WIRES DC 12V

POWER SUPPLY ~/N 220-240V 50Hz

L N

1 2 3

TB3

TB1

YLW

ORN

BRN

RED

AC

12.3V

AC12.3V

BRN BRN

T

LED

O.B.

SW1 SW2 SW3

OFF

ON

21

3 2 1

CN4T

4321

RED ORN YLW

GRN/YLW

LD1

CN3

220V 230V

240V

RED

BLU

LD2

LD3

4

RED BLU

LD4

CN2

LD5

RT

LD6

LD7

LD8

SV TRF

RED

21R

WHT WHT

4321

✕14 ✕13 ✕12 ✕11

✕14 ✕13

21S4

RED

GRY

21 S4

L3/5

52C

CN4

52C

GRY

52C

A1

A2

T3/6

✕12 ✕11

CH

WHT

HC

BLU

T1/2L1/1

WHT BLU RED

ZNR

C2

63H1

F

RST

BLUBLU

26C

51CM

BRN

BRN 63H1

R

C

MC

S

F.C.

MF2

MF1

S

BLU

C1

BLU

ORN

WHT

3 4 2 1

WHT BLU REDRED ORN

MF

YLW

Main functions of LED

LED No.

LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8

Output display (light Compressor indoor command Heating indoor command 63H1 ON Compressor ON Outdoor fan ON 4-way valve ON Bypass valve ON Crankcase heater ON

(

when both Nos.1 and 2 of are ”OFF”

SW3

)

Outdoor coil thermistor short/open

RT overheat protection Defective input

)

Check display (flash

— —

— — —

How to use SW1 and 2

●

)

Pressing erases the past check contents loaded on the microcomputer.

●

The output display (light) remains lit during operation but pressing displays the past check contents in flashing mode. Pressing the switch again returns to output display (light).

SW1

SW2

NOTE : If the operation stops to function of the protection device, the check display flashes.

CAUTIONS FOR POWER SUPPLY WIRING

●

Since LD8 lights when normal power is furned ”ON”, check the power supply with the ON or OFF LD8.

❈

Since the transformer (T) is connected with 240V power, if 220V or 230V power is used, change the wiring connection in the following procedure.

CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES

●

Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers (1,2,3) for indoor and outdoor units.

❈When power supply is 220V

RED WHITE

220V ORANGE YELLOW

230V

240V

11