Mitsubishi Electric MSC-GE20VB User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 2
3. SPECIFICATION················································ 4
4. NOISE CRITERIA CURVES ······························ 5
5. OUTLINES AND DIMENSIONS ························ 7
6. WIRING DIAGRAM············································ 9
7. REFRIGERANT SYSTEM DIAGRAM ············· 10
8. SERVICE FUNCTIONS ····································11
9. MICROPROCESSOR CONTROL ··················· 14
10. TROUBLESHOOTING····································· 22
11. DISASSEMBLY INSTRUCTIONS ···················· 33
MSC-GE20VB - E1
MSC-GE25VB - E1
MSC-GE35VB - E1
MS-GE50VB -E1
MSH-GE50VB - E1
SPLIT-TYPE AIR CONDITIONERS
SERVICE MANUAL
Models
INDOOR UNIT
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Outdoor unit service manual
MU-GA•VB Series (OB386)
MUH-GA•VB Series (OB387)
MUX-A•VB Series (OB384)
MXZ-A•WV Series (OB319)
MU/MUH-GE•VB Series (OBH530)
No. OBH529
REVISED EDITION-A
PARTS CATALOG (OBB529)
Revision A:
• Another type of the electronic control P.C.
board (TYPE 2) has been added to the
original one (TYPE 1). They are both com-
patible with MS/MSH-GE50VB- E1 .
Please void OBH529.

2
TECHNICAL CHANGES
1
PART NAMES AND FUNCTIONS
2
MSC-GA20VB - E1 →MSC-GE20VB - E1
MSC-GA25VB - E1 →MSC-GE25VB - E1
MSC-GA35VB - E1 →MSC-GE35VB - E1
1. Front panel has been changed.
MS-GA50VB - E1 →MS-GE50VB - E1
1. Indoor fan motor has been changed. (RC4V32-AA RC4V32-BA)
MSH-GA50VB - E1 →MSH-GE50VB - E1
1. Indoor fan motor has been changed. (RC4V32-AA RC4V32-BA)
Emergency operation switch
Fan
Air outlet
Vertical vanes
Air inlet
to Breaker
Remote control
receiving section
Display section
Air cleaning filter(option)
(White bellows type)
Front panel
Power supply cord
Panel
Horizontal vane
Operation section
(When the front panel is opened)
Remote controller
Operation indicator lamp
Remote control
receiving section
Catechin air filter
MSC-GE20VB MSC-GE25VB MSC-GE35VB
Use the specified refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
Revision A:
• Another type of the electronic control P.C. board (TYPE 2) has been added to the original one (TYPE 1). They are both com-
patible with MS/MSH-GE50VB- E1 .
OBH529A

3
Front panel
(When the grille is opened)
Remote controller
Operation section Display section
Emergency operation switch
Operation indicator lamp
Air inlet
To breaker
Power supply cord
Remote control
receiving section
Air cleaning filter (option)
(White bellows type)
Horizontal vane
Vertical vanes
Catechin air filter
Remote control
receiving section
Panel
ACCESSORIES
Installation plate
Installation plate fixing screw 4 25 mm
Remote controller holder
Fixing screw for 3.5 1.6 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
1
7
1
2
2
1
1
MS-GE50VB
MSH-GE50VB
1
5
1
2
2
1
1
MSC-GE20VB
MSC-GE25VB
MSC-GE35VB
MS-GE50VB MSH-GE50VB
OBH529A

4
SPECIFICATION
3
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Heating: Indoor Dry-bulb temperature 20°C Wet-bulb temperature - °C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
Indoor-Outdoor piping length: 5 m
Indoor model
Function
Power supply
Air flow (High/Med./Low)
Running current
Power input
Power factor
Fan motor current
Model
Dimensions W H D
Weight
Air direction
Sound level
(High/Med./Low)
Fan speed (High/Med./Low)
Fan speed regulator
Remote controller model
Fan motor Electrical data
Special remarks
Cooling Heating
Single phase
230 V, 50 Hz
768/642/516
768/642/516
0.3
60
87
0.3
RC4V32-BA
1,100 325 258
16
5
42/38/34
1,070/920/780
1,070/920/780
3
KM04A
/h
A
Breaker capacity 1010
A
W
%
A
mm
kg
dB
rpm
MSH-GE50VB
Cooling
Single phase
230 V, 50 Hz
0.3
60
87
0.3
RC4V32-BA
1,100 325 258
16
5
42/38/34
3
KM04B
MS-GE50VB
Breaker capacity
Running current
Power input
Power factor
Model
Fan motor current
Dimensions W H D
Weight
Air direction
Air flow (High/Med./Low)
Sound level (High/Med./Low)
Fan speed (High/Med./Low)
Fan speed regulator
Remote controller model
A
A
W
%
A
mm
kg
m3/h
dB
rpm
MSC-GE20VB
Single phase
230 V, 50 Hz
Single phase
230 V, 50 Hz
Single phase
230 V, 50 Hz
10
0.17
35
90
RC4V19-JA
0.17
815 278 244
9
5
3
KM04F
Cooling
474/372/276
36/31/25
900/750/600
Heating
510/420/342
36/31/25
950/820/700
MSC-GE25VB
10
0.17
35
90
RC4V19-JA
0.17
815 278 244
9
5
3
KM04F
Cooling
474/384/306
36/31/25
900/770/650
Heating
588/456/342
39/32/25
1,050/870/700
MSC-GE35VB
10
0.19
40
92
RC4V19-HA
0.19
815 278 244
10
5
3
KM04F
Cooling
582/444/324
40/33/26
930/760/600
Heating
606/498/396
39/33/26
960/830/700
Electrical data
Fan motor
Special remarks
Indoor model
Function
Power supply
OBH529A

5
NOISE CRITERIA CURVES
4
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-10
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27 Wet-bulb temperature19
Heating : Dry-bulb temperature 20 Wet-bulb temperature -
MSC-GE20VB
COOLING
High
FUNCTIONFAN SPEED
36
HEATING
SPL(dB(A)) LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-10
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27 Wet-bulb temperature 19
Heating : Dry-bulb temperature 20 Wet-bulb temperature -
MSC-GE25VB
COOLING
High
FUNCTIONFAN SPEED
36
HEATING 39
SPL(dB(A)) LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-10
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling : Dry-bulb temperature 27 Wet-bulb temperature 19
Heating : Dry-bulb temperature 20 Wet-bulb temperature -
MSC-GE35VB
COOLING
FUNCTIONFAN SPEED
40
HEATING
High
39
SPL(dB(A)) LINE
OBH529A

6
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-10
NC-70
Test conditions,
Cooling : Dry-bulb temperature 27 Wet-bulb temperature 19
Heating : Dry-bulb temperature 20 Wet-bulb temperature -
COOLING
FUNCTIONFAN SPEED
42
HEATING
High
SPL(dB(A)) LINE
MSH-GE50VB
INDOOR UNIT
WALL
MICROPHONE
0.8m
1m
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-10
NC-70
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27°C Wet-bulb temperature 19°C
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
COOLING
FUNCTIONFAN SPEED
42
High
SPL(dB(A)) LINE
MS-GE50VB
OBH529A

7
OUTLINES AND DIMENSIONS
5
MSC-GE20VB
MSC-GE25VB
244
242 5
7 or more
90
110
30
149
606
278
60
815
783
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
Air out
Installation plate
Insulation 28
Drain hose 16
(Connected part O,D)
Air in
Liquid line 6.35-0.5m
Gas line 9.52-0.43m
Insulation 37 O.D
21 I.D
{
Wireless remote controller
162
19
58
81.5
81.5
41
2.5
42
271
231.5
4.5
81.5 133.5
326326
Wall hole 65
Indoor unit
Installation plate
Unit: mm
244
242
218.5
258
81.581.5
41
42
2.5
17.5
161.5161.5
326326
5
7 or more
90
110
30
149
606
278
60
815
783
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
Air out
Indoor unit
Installation plate
Wall hole 65
Installation plate
Insulation 28
Drain hose 16
(Connected part O,D)
Liquid line 6.35-0.5m
Gas line 9.52-0.43m
Insulation 37 O.D
21 I.D
{
Wireless remote controller
162
19
58
Air in
MSC-GE35VB Unit: mm
OBH529A

8
258
162
19
58
47
7.5
315
255.547
2.5
98 173
98 173414.5 414.5
5
253
791
56
1068
1100
325
Air out
Air in
Insulation 28
Drain hose 16
(Connected part O.D)
Installation plate
Wall hole 75
Wireless remote controller
Installation plate Indoor unit
{
Liquid line 6.35- 0.5 m
Gas line 12-0.43 m
Insulation 50 O.D
32 I.D
Power supply cord
Lead to right 2.0 m
Lead to left 1.0 m
MS-GE50VB
MSH-GE50VB
Unit: mm
OBH529A

9
WIRING DIAGRAM
6
MS-GE50VB
MSH-GE50VB
MSC-GE20VB MSC-GE25VB MSC-GE35VB
OBH529A

10
REFRIGERANT SYSTEM DIAGRAM
7
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe 9.52
(with heat insulator)
Unit:mm
Indoor coil
thermistor
RT12
Flared connection
Flared connection
Refrigerant pipe 6.35
(with heat insulator)
MS-GE50VB MSH-GE50VB
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe 12.7
(with heat insulator)
Flared connection
Flared connection
Indoor coil
thermistor
RT12
Refrigerant pipe 6.35
(with heat insulator)
Distributor
Refrigerant flow in cooling
Refrigerant flow in heating (MSC,MSH)
MSC-GE20VB MSC-GE25VB MSC-GE35VB
OBH529A