Mitsubishi PU-1.6VLJA2, PU-2NJA1, PU-2VJA2, PU-2.5NJA1, PU-2.5VJA2 Service Manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE AIR CONDITIONERS

CONTENTS

1.

COMBINATION OF INDOOR AND OUTDOOR UNITS

·····3

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

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

4. OUTLINES AND DIMENSIONS ························6

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

6. REFRIGERANT SYSTEM DIAGRAM·············12

7. DISASSEMBLY PROCEDURE ·······················13

8. PARTS LIST ····················································15

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

Outdoor unit
[Model names]

PU-1.6VLJA
PU-2VJA
PU-2NJA
PU-2.5VJA
PU-2.5NJA
PU-3VJA
PU-3YJA
PU-3NJA
PU-4VLJSA
PU-4YJSA
PU-4TJSA

[Service Ref.]

PU-1.6VLJA

2

PU-2VJA

2

PU-2NJA

1

PU-2.5VJA

2

PU-2.5NJA

1

PU-3VJA

2

PU-3YJA

2

PU-3NJA

1

PU-4VLJSA

2

PU-4YJSA

2

PU-4TJSA

1

No.OC127

1997

Outdoor unit
PU-3J

The Slim Line.
From Mitsubishi Electric.

3

2 PART NAMES AND FUNCTIONS

1 COMBINATION OF INDOOR AND OUTDOOR UNITS

wUnit of pressure is based on ISO (International Standardization Organization)

[kgf/cm

2

]➝[Mpa] (1MPa=10.2kgf/cm2)

●Outdoor Unit

PU-1.6VLJA2
PU-2VJA2
PU-2NJA1

Air intake

Air outlet
(Expels warm air during cooling)

PU-4VLJSA2
PU-4YJSA2
PU-4TJSA2

Air intake

Air outlet

PU-2.5VJA2
PU-2.5NJA1
PU-3VJA2
PU-3YJA2
PU-3NJA1

Air intake

Air outlet

Service

Manual No.

Service

Ref.

OC138
OC125

OC134
OC131
OC143

OC129

PL-GJ(S)B

1

PL-KJC
PC-GJ(S)A

1

PE-EJH(S)A1
PS-GJ(S)1

PK-1.6/2FLA3
PK-2.5/3/4FLSA

2

Indoor unit Outdoor unit

PU-1.6 PU-2 PU-2.5 PU-3 PU-4

VLJA2

VLJA2 VJA2 NJA1 VJA2

NJA1

VJA2 YJA2

YJA2 TJA1

NJA1

_____

______
_
_
_

_
_

_
_

_
_

_
_

OC141PS-GJ(S)A

1

_ ____

4

3 DATA

1. ELECTRICAL SPECIFICATIONS

(1) Rating conditions

●JIS B 8616

Indoor : 27˚C(80˚F)DB,19˚C(66˚F)WB
Outdoor : 35˚C(95˚F)DB,24˚C(75˚F)WB

●SSA 385,386

Indoor : 29˚C(84˚F)DB,19˚C(66˚F)WB
Outdoor : 46˚C(115˚F)DB,24˚C(75˚F)WB

2. POWER SUPPLY & MODEL NAMES

Notes : 1.Power supply key N…1ph,220V,60Hz Y…3ph,380/220,400/230,

V(L)…1ph,220,230,240V,50Hz 415/240V,50Hz,4 wires
T…3ph,220V,60Hz

Power supply (1 phase)

Service Ref.

Current
Input
Starting current

A

A

kW

Power supply (1 phase)

Service Ref.

Current
Input
Starting current

A

A

kW

Power supply (3 phase)

Service Ref.

Current
Input
Starting current

A

A

kW

Power supply (3 phase)

Service Ref.

Current
Input
Starting current

A

A

kW

V : 220V 50Hz V : 230V 50Hz

PU-1.6VLJA

2 PU-2VJA2 PU-2.5VJA2 PU-1.6VLJA2 PU-2VJA2

PU-1.6VLJA2

PU-3VJA2 PU-4VLJSA2 PU-3VJA2 PU-4VLJSA2 PU-3VJA2 PU-4VLJSA2 PU-3NJA2

PU-2VJA2 PU-2.5VJA2 PU-2NJA1

PU-3YJA2 PU-4YJSA2 PU-3YJA2

PU-3YJA2 PU-4YJSA2 PU-4TJSA1

PU-4YJSA2

PU-2.5NJA1

PU-2.5VJA2

11.3

2.44
48

6.7

1.42
30

11.4

2.46
45

11.0

2.46
50

6.7

1.47
32

11. 0

2.49
47

Power supply (1 phase)

Service Ref.

Current
Input
Starting current

A

A

kW

V : 240V 50Hz N : 220V 60Hz

10.8

2.48
52

6.9

1.52
33

10.7

2.52
49

11.4

2.45
54

13.4

2.91
58

V : 220V 50Hz V : 230V 50Hz V : 240V 50Hz N : 220V 60Hz

15.1

3.18
68

16.9

3.35
79

14.4

3.19
68

16.6

3.44
79

13.9

3.20
68

16.3

3.52
79

17.6

3.44
80

Y : 380/220V 50Hz

5.7

3.18
36

5.7

3.29
38

Y : 400/230V 50Hz

5.4

3.19
36

5.5

3.33
38

Y : 415/240V 50Hz T : 200V 60Hz

5.3

3.20
36

5.5

3.36
38

12.2

4.27
69

Power supply

Service Ref.

Current
Input
Starting current

A

A

kW

PU-2NJA

1

13.6

2.97
54

PU-2.5NJA

1

15.8

3.44
58

N : 220V (1 phase) 60Hz

Power supply

Service Ref.

Current
Input
Starting current

A

A

kW

PU-3NJA

1

20.9

4.09
80

PU-4TJSA

1

14.0

4.97
69

N : 220V (1 phase) 60Hz T : 220V (3 phase) 60Hz

Power supply

50Hz

60Hz

1ph.
3ph.
1ph.
3ph.

Service Ref. (indoor unit)

220, 230, 240V
380/220, 400/230, 415/240V
220V
220V

Model name (outdoor unit)/Service Ref.

PU-1.6 PU-2 PU-2.5 PU-3 PU-4

PU-1.6VLJA

2 PU-2VJA2 PU-2.5VJA2

_

_

_
_
_

_

_

_

PU-2NJA

1 PU-2.5NJA1

PU-3VJA2 PU-4VLJSA2
PU-3YJA2
PU-3NJA1

PU-4YJSA2

PU-4TJSA1

5

2. COMPRESSOR TECHNICAL DATA

Compressor

RH247VFC

NHJ33NBD

NHJ41VMD

NHJ38NBD

NHJ41VMD

NHJ52VND

NHJ52YDA

NHJ47NAD

NH56VND

NHJ56YDA

NHJ56TKA

Winding resistance("). at 20:

R-C/U-V S-C/V-W W-U

2.00 4.55 –

0.70 1.44 –

0.92 2.44 –

0.70 1.42 –

0.92 2.44 –

0.83 2.03 –

3.68 3.68 –

0.58 1.14 3.68

0.64 1.55 –

3.30 3.30 3.30

0.83 0.83 0.83

Outdoor unit

Service Ref.

PU-1.6VLJA

2

PU-2NJA1
PU-2VJA2
PU-2.5NJA1
PU-2.5VJA2
PU-3VJA2
PU-3YJA2
PU-3NJA1
PU-4VLJSA2
PU-4YJSA2
PU-4TJSA2

3. ADDITIONAL REFRIGERANT CHARGE (R-22

……

kg (lbs))

Service Ref.

Outdoor unit precharged(kg)

(up to 20m)

Refrigerant piping length (one way)

PU-1.6VLJA

2

PU-2VJA2
PU-2NJA1
PU-2.5VJA2
PU-2.5NJA1
PU-3VJA2
PU-3YJA2
PU-3NJA1
PU-4VLJSA2
PU-4YJSA2
PU-4TJSA2

1.3

1.78

1.9

2.4

2.4

3.08

2.88

3.5

3.8

4.6

4.6

20m (66ft) 25m (82ft) 30m (98ft) 35m (115ft) 40m (131ft)

0

0

0

0

0

0

0

0

0

0

0

–

0.06 (0.13)

0.06 (0.13)

0.06 (0.13)

0.06 (0.13)

0.06 (0.13)

0.06 (0.13)

0.06 (0.13)

0.15 (0.33)

0.15 (0.33)

0.15 (0.33)

–––

––

––

––

––

––

––

––

0.45 (0.99) 0.6 (1.32)

0.45 (0.99) 0.6 (1.32)

0.45 (0.99) 0.6 (1.32)

0.12 (0.26)

0.12 (0.26)

0.12 (0.26)

0.12 (0.26)

0.12 (0.26)

0.12 (0.26)

0.12 (0.26)

0.30 (0.66)

0.30 (0.66)

0.30 (0.66)

6

4 OUTLINES AND DIMENSIONS

PU-1.6VLJA2/PU-2VJA2/PU-2NJA1

Unit : mm (inch)

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

10

10

Note:Allow adequate

upper clearance

150

500

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 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 front 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

Drain hole

2-12✕23 Oval holes

(standard bolt M10)

Handle for moving

7

PU-2.5VJA2/PU-2.5NJA1
PU-3VJA2/PU-3YJA2 /PU-3NJA1

Unit : mm (inch)

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

10

10

Note:Allow adequate

upper clearance

150

500

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 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 front 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

Drain hole

2-12✕23 Oval holes

(standard bolt M10)

Handle for moving

8

PU-4VLJSA2/PU-4YJSA2/PU-4TJSA1

Unit : mm (inch)

300

Note:Allow adequate

upper clearance

10

150

500

Service space

500

4553

Standard bolt length

Knock out holes for

power line 2-[27

120

60

R20

25 max.

80

65

Outdoor Unit-necessary surrounding clearance

Front opening

10

1715

185

(7-9/32)

Air intake

500(19-11/16)

185

(7-9/32)

10

Terminal block for

indoor and outdoor

unit connection

362(14-1/4)

330(13)

39.5 27.5

870(34-1/4)

Air outlet

Air intake

Terminal block for power line

302

Ground

Service panel

terminal

Handle

for moving

52461

585

Refrigerant-pipe flared

1258(49-1/2)

959

connection [19.05 3/4F

Refrigerant-pipe flared

connection [9.52 3/8F

403

382

83 524

345

Knock out hole

for front piping

(refrigerant,drainage

2-12✕23 Oval holes

40 60524

R20

Knock out hole

for front piping

(refrigerant,

drainage and wiring)

and wiring)

57
52

Bottom

39

104

(standard bolt M10)

Drain hole

R6

piping hole

2-U-shaped

Front right piping holes-

17

notched

holes

Drain hole

detail figures

12

Outlet guide

installation hole

Handle for moving

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

300

1000For 10 units or less

The upper side must be open.

Outdoor Unit-necessary surrounding clearance

(Concentrated installation)

150 10

Side air intake

Handle

for moving

Rear fresh

air intake

33

23

Rear piping hole

95

138

9

5 WIRING DIAGRAM

PU-1.6VLJA2

PU-2VJA2,PU-2.5VJA2

WHT

BLU
RED

WHT

MC

MF3

BLU
RED

ORNORN

4
2
1
3

63H

52C

63L

A1

A2

A

WHT

RED

TB3

1

1

2

2

B

P1

P3 P3

X17

X6

X6

X17X14

X14

CP

P2

52C

52C

52
C

F3

(5A)

GRY

GRY

GRY

GRY

BLU

RED

ORN

YLW

WHT

WHT

WHT

BLU

RED

49C

49F3

C3

C

BLU

WHT

TB1

POWER SUPPLY
~/N
220-240V
50Hz

N

T1/2

BLU

T3/6

L3/5

L1/1

52C

S

R

C

13 14

VLT

VLT

22
21

52C

HC

GRN/YLW

L

PU-3VJA2

PU-3NJA1

POWER
SUPPLY
~/N
220~240V
50Hz

TB3

TB1

RED

1

2

WHT

L

N

(5A)

WHT

BLU

GRN/YLW

BLU

RED

a

F3

52

C

b

YLW

ORN

B

A

X14

1

X17X14

2

52C

R

T

63H

GRY

P1

52C

52C

X6

X6

U

W

GRY

P3 P3

WHT

X17

63L

P2

BLU

WHT

WHT

BLU
RED

C3

WHT

CP

BLU

R

C

S

RED

C
49C

BLU

3

RED

1

ORNORN

2

WHT

4

49F3

MC

MF3

C
CP
C3
F3
MC
MF3
TB1
TB3
49C
49F3
52C
63H
63L

NOTES:1.THE DOTTED LINES SHOW FIELD WIRING.

2. TO INDOOR UNIT TERMINAL BLOCK.

COMPRESSOR RUN CAPACITOR
COMPRESSOR PROTECTOR
FAN MOTOR CAPACITOR
FUSE(5A)
COMPRESSOR
FAN MOTOR
POWER SUPPLY TERMINAL BLOCK
INDOOR/OUTDOOR CONNECTING LINE TERMINAL BLOCK
COMPRESSOR INTERNAL THERMOSTAT
FAN MOTOR INTERNAL THERMOSTAT
COMPRESSOR CONTACTOR
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH

POWER
SUPPLY
~/N
220-240V
50Hz

TB1

WHT

RED

A1

B

BLU

52

BLU

C

A2

ORN

X17X14

52C

L1/1

GRY

L3/5

HC

GRY

22
21

GRY

P1

X6

X6

TB3

RED

1

2

WHT

L

N

(5A)

F3

GRN/YLW

YLW

A

X14

1

2

POWER
SUPPLY
~/N
220V 60Hz

TB1

WHT

L

BLU

N

GRN/YLW

TB3

(5A)

RED
1

2

WHT

BLU

RED

52C

A1

F3

52

C

A2

YLW

ORN

A

B

X14

1

X17X14

2

52C

63H

52C

13 14

VLT

52C

52C

L1/1

GRY

L3/5

HC

GRY

22
21

GRY

P1

52C

X6

X6

T1/2

GRY

VLT

P3 P3

52C

63H

52C

13 14

VLT

52C

X17

VLT

P3 P3

63L

WHT

T1/2

T3/6

WHT

BLUT3/6

P2

GRY

WHT

X17

63L

WHT

P2

49C

C

C

S

RED

R

BLU

WHT

WHT

3

ORN

ORN

1

C3

CP

BLU

WHT

WHT

REDRED

2

BLU

BLU

4

C

BLU
RED

C3

WHT

CP

49F3

4
2
1
3

BLU

RED

BLU
RED

ORNORN

WHT

S

C
49C

R

MC

MF3

49F3

C
CP

MC

C3
F3
HC
MC
MF3

MF3

TB1
TB3
49C
49F3
52C
63H
63L LOW PRESSURE SWITCH

NOTES:1.THE DOTTED LINES SHOW FIELD WIRING.

2. TO INDOOR UNIT TERMINAL BLOCK.

COMPRESSOR RUN CAPACITOR
COMPRESSOR PROTECTOR
FAN MOTOR CAPACITOR
FUSE(5A)
CRANKCASE HEACITOR
COMPRESSOR
FAN MOTOR
POWER SUPPLY TERMINAL BLOCK
INDOOR/OUTDOOR CONNECTING LINE TERMINAL BLOCK
COMPRESSOR INTERNAL THERMOSTAT
FAN MOTOR INTERNAL THERMOSTAT
COMPRESSOR CONTACTOR
HIGH PRESSURE SWITCH

10

PU-2NJA1,PU-2.5NJA1

PU-3YJSA2

WHT

BLU
BRN

YLW

WHT

49F4

MF4

MF3

MC

BLU
RED

ORN

4
2
1
3

WHT

WHT

GRY

52C

13

32
31

21

14

63L

63H

26C

A2

A1

A

WHT

REDTB3

1

1

2

2

BP1 P3P3

X17

X6

X6

X17X14

X14

CP

P2

52C 52C

52C

HC

F3

(5A)

WHT

GRY

VLT

VLT

GRY

BLU

RED

ORN

YLW

WHT

BLU
RED

ORN

C3

C4

BLUBLU

BLU

RED

C

BLU

GRY

GRY

RED

TB1

C
CP
C3,4
F3
HC
MC
MF3,4
TB1
TB3
49C
49F3,4
52C
63H
63L

COMPRESSOR RUN CAPACITOR
COMPRESSOR PROTECTOR
FAN MOTOR CAPACITOR
FUSE(5A)
CRANKCASE HEATOR
COMPRESSOR
FAN MOTOR
POWER SUPPLY TERMINAL BLOCK
INDOOR/OUTDOOR CONNECTING LINE TERMISTOR BLOCK
COMPRESSOR INTERNAL THERMOSTAT
FAN MOTOR INTERNAL THERMOSTAT
COMPRESSOR CONTACTOR
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH

NOTES:1.THE DOTTED LINES SHOW FIELD WIRING.

2. TO INDOOR UNIT TERMINAL BLOCK.

POWER
SUPPLY
~/N
220V-240V
50Hz

L

N

L3/5 T3/6 WHT

L1/1 T2/1

52C

WHT

49F3

49C

BLU
RED

ORN

4

R

2
1
3

S

C

GRN/YLW

52

C

PU-4VLJSA2

POWER
SUPPLY
~/N
220V 60z

TB3

TB1

RED
1

2

WHT

N

L

(5A)

RED

BLU

GRN/YLW

BLU

RED

A1

F3

52

C

A2

YLW

ORN

A

B

X14

1

X17X14

2

52C

L1/1

L3/5

63H

GRY

P1

52C

52C

X6

X6

T1/2

GRY

P3 P3

WHT

X17

63L

P2

WHT

BLUT3/6

WHT

49C

C

C

S

RED

R

BLU

WHT

WHT

3

ORN

ORN

1

C3

CP

BLU

REDRED

2

BLU

4

49F3

MC

MF3

C
CP
F3
MC
MC
MF3
TB1
TB3
49C
49F3
52C
63H
63L

NOTES:1.THE DOTTED LINES SHOW FIELD WIRING.

2. TO INDOOR UNIT TERMINAL BLOCK.

COMPRESSOR RUN CAPACITOR
COMPRESSOR PROTECTOR
FAN MOTOR CAPACITOR
FUSE(5A)
COMPRESSOR
FAN MOTOR
POWER SUPPLY TERMISTOR BLOCK
INDOOR/OUTDOOR CONNECTING LINE TERMISTOR BLOCK
COMPRESSOR INTERNAL THERMOSTAT
FAN MOTOR INTERNAL THERMOSTAT
COMPRESSOR CONTACTOR
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH

POWER SUPPLY
3N~
380/220~415/240V 50Hz

TB3

RST

1
2

52C

GRY

ORN

RED

P1

WHT

X6

L1/1

L2/3

L3/5

BLU

BLU

YLW

A

52C

X6

47

13

HC

VLT

47

52C

52C

52C

26C

14

P3 P3

VLT

YLW

BRN

C

X17

36H

63L

WHT

P2

51C

51C

A

YLW

9695

WHT

T1/2

T2/4

T3/6

GRY

CP

TB1

CP
C3
F3
HC
MC
MF3
TB1
TB3
26C
47
49F3
51C
52C
63H
63L

NOTES:1.THE DOTTED LINES SHOW FIELD WIRING.

2. TO INDOOR UNIT TERMINAL BLOCK.

RED

L1

WHT

L2

BLK

L3

N

F3

(5A)

RED

1

2

WHT

GRY

GRN
/YLW

22

GRY

21

RED

A1

52

C

A2

YLW

A

B

X14

1

X17X14

2

COMPRESSOR PROTECTOR
FAN MOTOR CAPACITOR
FUSE(5A)
CRANKCASE HEATER
COMPRESSOR
FAN MOTOR
TERMINAL BLOCK (POWER SUPPLY)
TERMINAL BLOCK (CONNECTING WIRES INDOOR/OUTDOOR)
THERMAL SWITCH
ANTI-PHASE PROTECTOR
INTERNAL THERMOSTAT
TERMINAL RELAY
COMPRESSOR CONTACTOR
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH

WHT

RED

WHT

BLU

WHT

BLU

4

RED

RED

BLU

2

ORNORN

1
3

WHT

C3

W

49F3

MF3

MF4