Mitsubishi PC-3GJA2 Service Manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, COOLING AIR CONDITIONERS

CONTENTS

1. TECHNICAL CHANGE ·························2

2. SPECIFICATIONS·································3

3. DATA ·····················································5

4.

REFRIGERANT SYSTEM DIAGRAM

········7

5. PARTS LIST··········································8

Indoor unit
[

Model name] [Service Ref.]

PC-3GJA

PC-3GJA

2

No. OC208

This service manual describes
only the change points.
Please refer to OC134 REVISED
EDITION-A as to excluding this
manual.
This manual does not cover the
following outdoor units.
When serving them, please refer
to the service manual
No.OC127 REVISED EDITION-A,
OC187 and this manual in a set.
[Service Ref.]
PU-3YJC (OC187)
PU-3VJC (OC187)
PU-3NJA

1

(OC127 REVISED EDITION-A)

INDOOR UNIT

Ceiling Suspended

Series PC

MITSUBISHI ELECTRIC

12
11
10

9
8
7
6
5
4
3
2
1

29
28
27
26
25
24
23
22
21
20
19
18

TIMER TEMP

TIMER/TEMP.

UP

DOWN

POWER

COOL

ON/OFF

LOUVER

MODE

SELECT

FAN

SPEED

TIMER

MODE

DRY
FAN

HIGH

LOW

ON

AUTO
STOP

START

REMOTE CONTROLLER

1999

2

1

TECHNICAL CHANGE

CHANGE POINTS PC-3GJA1 PC-3GJA2

OUTDOOR UNIT

TOTAL INPUT (50Hz) 3.30 2.77 (PU-3JB)

COOLING

CAPACITY

(50Hz)

PU-3VJA

2

PU-3YJA3

24600 Btu/h

7200W

25900 Btu/h (PU-3JC)
7600W
25600 Btu/h (PU-3JB)
7500W

PU-3VJC
PU-3VJB

PU-3YJC
PU-3YJB

Differences between the connection with PC-3GJA1

2

SPECIFICATIONS

1. STANDARD SPECIFICATIONS

H

W

D

W

D
H

Service Ref.

W

Btu/h

W

Btu/h

W

Btu/h

kW

kW

3

/ min

m

CFM

3

/ min

m

CFM

Pa(mmAq)

dB

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

kg(lbs)

W

kW

kW

3

/ min(CFM)

m

3

m

/ min(CFM)

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

kg(lbs)

PC-3GJA

7,600

25,900

7,800

26,600

6,500

22,200

3.30

3.60/4.25 w1/w4

PC-3GJA

Munsell 0.7Y 8.59/0.97

0 (Direct blow)

Remote control & Built-in

210(8-1/4)

1310(51-9/16)

680(26-3/4)

PU-3VJC, PU-3YJC, PU-3NJA

(V) 2.2, (Y) 2.4 / (N) 2.2 2.2

1 PU-3VJB, PU-3YJB

Munsell 5Y 7/1

Capillary tube

870(34-1/4)

295+24(11-5/8 add 1)

850(33-7/16)

2

2

0.07

18-14

635-494

18-14

635-494

43-37
43-37
26 (1)

34(75)

32/38

w5

0.085
50(1765)
50(1765)

52/53

73(161)

Y : Thermal switch, HP switch, LP switch,

Reversed-phase protector,
Thermal relay

Item

Cooling capacity w1

Cooling capacity (SSA) w4

Total input w2

Service Ref.

External finish
Fan motor output

Airflow Hi-Lo

External static pressure
Operation control &Thermostat

Indoor unitOutdoor unit

Noise level high-low

Unit drain pipe I.D.

Dimensions

Weight

Service Ref.

External finish
Refrigerant (R-22) control
Crankcase heater w3
Compressor output
Protection devices
Fan motor output

Airflow

Noise level

Dimensions

Weight

50Hz

60Hz

60Hz

50Hz
60Hz

50Hz

60Hz

50Hz
60Hz

50/60Hz
50/60Hz

50Hz
60Hz

50/60Hz

Notes :
w1 Rating conditions (JIS B8616, GB/T 7725-96) w4 Rating conditions (SSA385, 386)

Indoor : D.B. 27°C, W.B. 19°C Indoor : D.B. 29°C, W.B. 19°C
Outdoor : D.B. 35°C, W.B. 24°C Outdoor : D.B. 46°C, W.B. 24°C
Refrigerant piping length (one way) : 5m (16ft) Refrigerant piping length (one way) : 5m (16ft)

w2 Total input based on indicated voltage w5 V, N : Inner thermostat, HP switch, LP switch.

MODEL

50Hz
60Hz

PC-3GJA2
1ph 220V/1ph 220V, 3ph 380V
1ph 220V/1ph 220V

7,500

25,600

2.77

w3 The capacity of crankcase heater (W) based on 220V

3

4

2. POWER SUPPLY & MODEL NAMES

Power supply

50Hz

1ph.

60Hz 1ph.

3ph.

Indoor unit Service Ref.

220, 230, 240V

220V

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

380/220V

220V

PC-3GJA

2

Outdoor unit Service Ref.

PU-3VJC

PU-3VJB

PU-3YJC

PU-3YJB

PU-3NJA

1

Power supply (1 Phase) V : 220V 50Hz

Service Ref. PC-3GJA

2

0.51

0.12

1.17

PU-3

V : 230V 50Hz

PC-3GJA

2

0.53

0.13

1.22

PU-3

V : 240V 50Hz

PC-3GJA

2

0.55

0.15

1.27

PU-3

N : 220V 60Hz

PC-3GJA

2

0.70

0.16

1.11

PU-3

Current A

Outdoor unit

Input
Starting current

kW

A

(2). Rating conditions -SSA 385, 386

{

Indoor : D.B. 29°C (84°F), W.B. 19°C (66°F)

Outdoor : D.B. 46°C (115°F), W.B. 24°C (75°F)

PC Series Indoor Unit (Single Phase)

Power supply (1 Phase) N : 220V 60Hz

Service Ref. PC-3GJA

2

Current A

Outdoor unit

Input
Starting current

kW

A

0.70

0.16

1.11

PU-3

Notes : 1. Power supply key N

...

1ph, 220V,60Hz Y

...

3ph. 380/220, 400/230, 415/240V,

V

...

1ph, 220, 230, 240V 50Hz 50Hz, 4 wires

2. Primary power supplies for all indoor units are single-phase.

3. ELECTRICAL SPECIFICATIONS

(1). Rating conditions -JIS B 8616

{

Indoor : D.B. 27°C (80°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F)

PC Series Indoor Unit (Single Phase)

5

DATA

3

1. PERFORMANCE DATA
Cooling capacity

50Hz

Cooling Capacity Correction Factors

50Hz

Service Ref.

PU-3VJC / PU-3YJC

PC-3GJA

2

Temperature T.C.
Outdoor D.B.

21˚C
(69.8˚F)

Indoor W.B.
16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

7.6

8.1

8.4

8.5

8.6

9.1

C.F.

(T.I.)

PU-3VJB / PU-3YJB

T.C. C.F.

(T.I.)

0.81

0.82

0.83

0.83

0.84

0.86

7.5

8.0

8.3

8.4

8.5

9.0

0.81

0.82

0.83

0.83

0.84

0.86

25˚C
(77˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

7.5

7.9

8.2

8.3

8.5

9.0

0.84

0.85

0.86

0.86

0.87

0.89

7.4

7.8

8.1

8.2

8.4

8.9

30˚C
(86˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

7.2

7.7

7.9

8.0

8.2

8.7

0.90

0.92

0.93

0.93

0.94

0.96

7.1

7.6

7.8

7.9

8.1

8.6

32.2˚C
(90˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

7.1

7.5

7.8

7.9

8.0

8.5

0.93

0.95

0.96

0.97

0.97

0.99

7.0

7.4

7.7

7.8

7.9

8.4

35˚C
(95˚F)

16˚C
18˚C

19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)

(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

6.9

7.4

7.6

7.7

7.8

8.4

0.96

0.99

1.00

1.00

1.01

1.04

6.8

7.3

7.5

7.6

7.7

8.3

40˚C
(104˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

6.6

7.0

7.3

7.4

7.5

8.0

1.03

1.06

1.07

1.08

1.08

1.11

6.5

6.9

7.2

7.3

7.4

7.9

40.6˚C
(105˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

6.5

7.0

7.2

7.3

7.5

8.0

1.04

1.06

1.08

1.08

1.09

1.12

6.5

6.9

7.1

7.2

7.4

7.9

45˚C
(113˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

6.3

6.7

6.9

7.0

7.2

7.7

1.10

1.12

1.14

1.15

1.16

1.20

6.2

6.6

6.8

6.9

7.1

7.6

46˚C
(115˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

6.2

6.6

6.9

7.0

7.1

7.6

1.11

1.14

1.15

1.16

1.17

1.21

6.1

6.5

6.8

6.9

7.0

7.5

50˚F
(122˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

5.9

6.4

6.6

6.7

6.8

7.3

1.16

1.19

1.21

1.22

1.23

1.28

52˚C
(125.5˚F)

16˚C
18˚C
19˚C

19.4˚C
20˚C
22˚C

(60.8˚F)
(64.4˚F)
(66.2˚F)

(67˚F)
(68˚F)

(71.6˚F)

5.8

6.2

6.4

6.5

6.7

7.2

1.19

1.22

1.24

1.25

1.26

1.31

0.84

0.85

0.86

0.86

0.87

0.89

0.90

0.92

0.93

0.93

0.94

0.96

0.93

0.95

0.96

0.97

0.97

0.99

0.96

0.99

1.00

1.00

1.01

1.04

1.03

1.06

1.07

1.08

1.08

1.11

1.04

1.06

1.08

1.08

1.09

1.12

1.10

1.12

1.14

1.15

1.16

1.20

1.11

1.14

1.15

1.16

1.17

1.21

Evaporator airflow (m

3

/min) 18

Bypass factors

S.H.F. at rating conditions

0.08

0.73

18

0.08

0.73

Service Ref.

Refrigerant piping length (one way)

5m (16ft)

PC-3GJA

2

1.0

10m (33ft)

0.978

15m (49ft)

0.962

20m (66ft)

0.948

25m (82ft)

0.934

30m (98ft)

0.921

35m (115ft)—40m (131ft)—45m (148ft)—50m (164ft)

—

Notes : 1. T.C. : Total capacity ( o 103W)

...

(Btu / h)

.
=

. (W) o 3.4, (kcal / h) = (W) o 0.86

C.F. (T.I.) : Correction factors of Total input (Indoor unit input + Outdoor unit input)

2. (°F) = 32 + 9 / 5 (°C)
Lower limit ·········Indoor : D.B. 21°C (70°F), W.B. 15.5°C (60°F), Outdoor : D.B. 21°C (70°F)

3. Guaranteed operating range (cooling)

{

Upper limit ·········Indoor : D.B. 35°C (95°F), W.B. 22.5°C (72.5°F), Outdoor : D.B. 52°C (125.5°F) PU-JC

: D.B. 46°C (115°F) PU-JB

6

2. STANDARD OPERATION DATA

3. OUTLET AIR SPEED AND COVERAGE RANGE

Service Ref. PC-3GJA2

MODE

Capacity W

Input

Indoor unit service Ref.

TotalElectical circuitRefrigerant circuitIndoor side

Outdoor

side

kW

Discharge pressure

MPa

(kgf/F)

Suction pressure

MPa

(kgf/F)

Discharge temperature ˚C

Condensing temperature ˚C

Suction temperature ˚C

Ref. pipe length

Intake air temperature

Discharge air temperature

m

D.B. ˚C

W.B. ˚C

D.B. ˚C

D.B. ˚C

W.B. ˚C

Phase, Hz

Volts

Amperes

Outdoor unit service Ref.

Phase, Hz

Volts

Amperes

Intake air temperature

1.96

(20.0)

0.44
(4.5)

7,600

3.30

1, 50

220

0.51

PU-3VJC

1, 50

220

15.1

87.9

52.3

3.7

5

27

19

12.2

35

24

1.91

(19.5)

0.46

(4.69)

7,500

2.77

1, 50

220

0.51

PU-3VJB

1, 50

220

12.4

84

50.7

3.8

5

27

19

12.3

35

24

Cooling

PC-3GJA

2

Airflow
Air speed
Coverage
range
Airflow
Air speed
Coverage
range

m

3

/min

m/sec.

m

ft

m

3

/min

m/sec.

m

ft

Configuration

50Hz

Frequency

60Hz

Service Ref.

PC-3GJA

2

18

3.8

10.4

34.5
18

3.8

10.4

34.5

Ceiling suspended

The air coverage range is the value up to the position
where the air speed is 0.25 m/sec. when air is blown out
horizontally from the unit at Hi notch position.
The coverage range should be used as a general
guideline since it varies according to the size of the room
and furniture inside the room.

The unit of pressure has been changed to MPa based on SI(International System of unit) in accordance with I.S.O.(International
Organization for Standardization).

The conversion factor is : 1(MPa)=10.2(kgf / FF)

REFRIGERANT SYSTEM DIAGRAM4

PC-3GJA2 / PU-3VJC, PU-3YJC

Refrigerant pipe ø15.88(5/8")
(with insulator) option

Flexible tube

Flared
connection

Indoor coil
thermistor
RT2

Distributor
with
strainer

PC-3GJA

Indoor heat
exchanger

2

strainer

Refrigerant pipe ø9.52(3/8")
(with heat insulator) option

Flared
connection

Ball
valve

Accumulator

Low pressure
switch

Charge
pIug

Check
pIug

Compressor

strainer

(O.D.3.2 oI.D.1.8 o800mm)
o2pcs

Ball valve
(with service port)

UNIT : mm(inch)

PU-3VJC
PU-3YJC

High pressure
switch

strainer

Capillary tube

D.P.R.
(Discharge pressure regulator)

Outdoor heat
exchanger

PC-3GJA

PC-3GJA

Indoor heat
exchanger

Indoor coil
thermistor
RT2

Distributor
with
strainer

2

/ PU-3VJB, PU-3YJB

2

Flexible tube

strainer

Flared
connection

Refrigerant pipe ø15.88(5/8")
(with insulator) option

Flared
connection

flow of refrigerant

Ball
valve

Accumulator

Low pressure
switch

Charge
pIug

Check
pIug

Compressor

strainer

(O.D.3.2 oI.D.1.8 o800mm)
o2pcs

High pressure
switch

strainer

Capillary tube

PU-3VJB
PU-3YJB

Outdoor heat
exchanger

Refrigerant pipe ø9.52(3/8")
(with heat insulator) option

Ball valve
(with service port)

flow of refrigerant

7

8

5

PARTS LIST

No.

Part No. Part Name Specification

GJA, GJA1, GJA2

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Amount

Q'ty / set Price

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

FAN MOTOR
FAN JOINT
SHAFT (FAN)
SLEEVE BEARING
MOTOR LEG
SIROCCO FAN
SIROCCO FAN
CASING
INDOOR COIL THERMISTOR
ROOM TEMPERATURE THERMISTOR
HEAT EXCHANGER
DRAIN PAN ASSY
DRAIN PLUG
BEARING SUPPORT
FAN GUARD
FAN GUARD
FAN GUARD
PIECE (MOTOR)

DC9C4P70MS

Remarks

(Drawing No.)

T7W 30J 762
R01 29J 116
R01 29J 100
R01 705 103
R01 29J 130
R01 29J 114
R01 33J 114
R01 17J 110
R01 17J 202
R01 18J 202
T7W 33J 480
R01 29J 529
R01 17J 524
R01 29J 145
T7W 20J 675
T7W 21J 675
T7W 18J 675
R01 43E 126

PC-3

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

MF

RT2
RT1

11

9

6

8

5

2

1

18

13

15

7

16

3

12

17

4•14

10

FAN PARTS
PC-3GJA
PC-3GJA

1

PC-3GJA2

9

No.

Part No. Part Name Specification

PC-3

GJA, GJA1, GJA2

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Amount

Q'ty / set Price

1
2
3
4
5
6
7
8
9

10

INDOOR CONTROLLER BOARD
FUSE
TRANSFORMER
CONTROL BOX
FAN MOTOR CAPACITOR
TERMINAL BLOCK
TERMINAL BLOCK
BOX COVER
REMOTE CONTROLLER BOARD
REMOTE CONTROLLER CORD

1
1
1
1
1
1
1
1
1
1

(BG00N015G12)

(BG02A804G13)

I.B

F1,2<I.B>

T

C
TB2
TB4

R.B

250V 6.3A

3P(L,N,;)
2P(1,2)

12m

Remarks

(Drawing No.)

T7W 27K 310
T7W 520 239
T7W 23J 260

—
T7W 39J 255
T7W 521 716
T7W 512 716

—
T7W 20K 200
T7W 139 305

8

7

5

3

2

6

4

9

10

1

ELECTRICAL PARTS
PC-3GJA
PC-3GJA

1

PC-3GJA2

10

STRUCTURAL PARTS
PC-3GJA
PC-3GJA

1

PC-3GJA2

18

4

23

8

9

6

3

2

7 19

26

25

22

1

17

24

10

5

15

27

12

1413

1116

11

No.

Part No. Part Name

Specification

PC-3

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

Unit

Amount

Q'ty / set Price

Part numbers that are circled not shown in the figure.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

RIGHT SIDE PANEL
LEFT SIDE PANEL
L.L. FILTER
REAR PANEL
FRONT PANEL
GRILLE ASSY
UNDER PANEL
GRILLE HINGE
GRILLE CATCH
RIGHT SIDE BOX
LEFT SIDE BOX
GUIDE VANE ASSY-6R.
GUIDE VANE ASSY-6L.
GUIDE VANE ASSY-6C.
AUTO VANE
VANE MOTOR
RIGHT LEG
LEFT LEG
WIRELESS BOARD CASE
JOINT SOCKET
DRAIN HOSE COVER
SIDE PLATE-R.
SIDE PLATE-L.
SERVICE PANEL
BEAM(GA)
REAR SUPPORT
VANE SUPPORT

1
1
2
1
1
2
1
4
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2

1
1
2
1
1
2
1
4
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2

(BG17H464H08)
(BG02H454H04)
(BG02R321G06)

MV

Remarks

(Drawing No.)

R01 17J 661
R01 17J 662
R01 A14 500
R01 29J 676
R01 29J 651
R01 17J 691
R01 29J 669
R01 17J 061
R01 17J 054
R01 17J 067
R01 17J 068
R01 17J 085
R01 18J 086
R01 29J 087
R01 29J 002
R01 29J 223
R01 17J 808
R01 17J 809
R01 17J 070
R01 17J 523
R01 17J 072
R01 18J 665
R01 18J 666
R01 17J 668

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GJA, GJA1GJA2

HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8310 TELEX J24532 CABLE MELCO TOKYO

cCopyright 1999 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Issued in Nov. 1999. No. OC208 1572
Printed in Japan

New publication, effective Nov. 1999
Specifications subject to change without notice