Mitsubishi Electric MS-GF25VA User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES······························ 6
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM············································ 9
7. REFRIGERANT SYSTEM DIAGRAM············· 10
8. SERVICE FUNCTIONS ··································· 12
9. MICROPROCESSOR CONTROL ··················· 14
10. TROUBLESHOOTING····································· 21
11. DISASSEMBLY INSTRUCTIONS···················· 35
SPLIT-TYPE AIR CONDITIONERS
Outdoor unit service manual
MU-GF·VA Series (OBH622)
SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB621)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Models
MS-GF20VA -E1
MS-GF25VA -E1
MS-GF35VA -E1
MS-GF50VA -E1
MS-GF60VA -E1
MS-GF80VA -E1
No. OBH621
REVISED EDITION-A
Please void OBH621.
Revision A:
• MS-GF50VA-
E1
, MS-GF60VA-
E1
and
MS-GF80VA-
E1
have been added.

2
MS-GF20VA - E1
MS-GF25VA - E1
MS-GF35VA - E1
1. New model
TECHNICAL CHANGES
1
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.
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
MS-GF50VA - E1
MS-GF60VA - E1
MS-GF80VA - E1
1. New model
Revision A:
• MS-GF50VA-
E1
, MS-GF60VA-
E1
and MS-GF80VA-
E1
have been added.
OBH621A

3
ACCESSORIES
PART NAMES AND FUNCTIONS
2
Model MS-GF20VA MS-GF25VA
MS-GF35VA
Installation plate 1
Installation plate fixing screw 4 × 25 mm 5
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
MS-GF20VA MS-GF25VA MS-GF35VA
Air filter
(Nano platinum filter)
Front panel
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter, option)
Operation indicator lamp
Remote control receiving section
Emergency operation switch (E.O. SW)
Horizontal vane
Air outlet Heat exchanger
Display section
Air inlet
Remote controller
OBH621A

4
ACCESSORIES
MS-GF50VA MS-GF60VA MS-GF80VA
Horizontal vane
Air outlet
Air filter
(Nano platinum filter)
Air inlet
Front panel
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter, option)
Remote controller
Display section
Heat exchanger
Operation indicator lamp
Remote control receiving section
Emergency operation switch
(E.O.SW)
Model MS-GF50VA MS-GF60VA
MS-GF80VA
Installation plate 1
Installation plate fixing screw 4 × 25 mm 7
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
OBH621A

5
SPECIFICATION
3
Indoor model MS-GF20VA MS-GF25VA MS-GF35VA MS-GF50VA MS-GF60VA MS-GF80VA
Function Cooling
Power supply Single phase 230 V, 50 Hz
Electrical
data
Running current A 0.20 0.22 0.30 0.42
Power input W 35 43 39 51
Fan motor
Model RC4V18-FA RC0J56-AF
Current A 0.20 0.22 0.30 0.42
Dimensions W × H × D mm 798 x 295 x 232 1,100 x 325 x 238
Weight kg 916
Special remarks
Air direction 5
Airflow
Super High (POWERFUL)
m3/h
558 624 1,086 1,086 1,206
High 474 558 870 942 1,086
Med. 378 396 762 822 978
Low 246 288 642 714 882
Sound level
Super High (POWERFUL)
dB (A)
40 44 45 48 50
High 36 40 42 45 47
Med. 31 33 38 41 43
Low 25 26 34 37 39
Fan speed
Super High (POWERFUL)
rpm
1,000 1,100 1,100 1,100 1,200
High 880 1,000 920 980 1,100
Med. 740 770 800 880 1,010
Low 540 610 720 790 930
Fan speed regulator 4
Remote controller model KM12A KM12B
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27 Wet-bulb temperature 19
Outdoor Dry-bulb temperature 35
Wet-bulb temperature 24
Indoor-Outdoor piping length: 5 m
OBH621A

6
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-70
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
40
NC-10
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
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-70
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
40
NC-10
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
Test conditions
Cooling: Dry-bulb temperature 27 °C
Wet-bulb temperature 19 °C
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-70
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
44
NC-10
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
NOISE CRITERIA CURVES
4
MS-GF20VA MS-GF25VA
MS-GF35VA
OBH621A

7
MS-GF50VA MS-GF60VA
MS-GF80VA
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-70
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
45
NC-10
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
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-70
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
48
NC-10
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
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-70
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
50
NC-10
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
OBH621A

8
Unit: mm
OUTLINES AND DIMENSIONS
5
211.5
231.5
253
21.5
155 155
80
80 225 225
3
5232
56
69
798
785 6.5
130619
50
295
50
42
56
43
42
8
100
107
112
45
56
69
33861
212.5
254
41
42
315 84
11×26 Oblong hole 11×20 Oblong hole
Installation plate
Indoor unit
Wall hole ø65
Air in
Air out
Installation plate
Piping
Drain hose
159
19
58
MS-GF20VA MS-GF25VA MS-GF35VA
Piping
Insulation ø35 O.D
Liquid line ø7 - 0.5 m (Flared connection ø6.35)
Gas line ø9.52 - 0.43 m (Flared connection: ø9.52)
Drain hose Insulation ø28 O.D Connected part ø16 O.D
Unit: mm
1090 5
1100
45 238.5
258.5
3
280
225 225
129
239.5
281
44
49.5 500.5 439.5
199.5199.5
110.5
65
63
76 843 181
65
65
30
63
65
67
63
325
3
100
125
160
110
(
70° )
238
5
210
21.5
184
12
Piping
Insulation Ø 50 O.D
Liquid line
Ø 9.52 - 0.5m (Flared connection Ø 6.35)
Gas line
Ø 12 - 0.43m (Flared connection Ø 15.88)
Drain hose Inslation
Ø 28 Connected part Ø 16 O.D
Piping
Insulation Ø 50 O.D
Liquid line
Ø 9.52 - 0.5m (Flared connection Ø 6.35)
Gas line
Ø 12 - 0.43m (Flared connection Ø 12.7)
Drain hose Inslation
Ø 28 Connected part Ø 16 O.D
Air out
Piping
Drain hose
11×26 Oblong hole 11×20 Oblong hole
Installation plate
Indoor unit
Wall hole
Ø 75
Air in Installation plate
MS-GF50VA
MS-GF60VA
159
19
58
Piping
Insulation Ø 50 O.D
Liquid line
Ø 9.52 - 0.5m (Flared connection Ø 9.52)
Gas line
Ø 12 - 0.43m (Flared connection Ø 15.88)
Drain hose Inslation
Ø 28 Connected part Ø 16 O.D
MS-GF80VA
MS-GF50VA MS-GF60VA MS-GF80VA
OBH621A

9
WIRING DIAGRAM
6
MS-GF20VA MS-GF25VA MS-GF35VA
MS-GF50VA MS-GF60VA MS-GF80VA
OBH621A

10
Unit: mm
REFRIGERANT SYSTEM DIAGRAM
7
MS-GF20VA MS-GF25VA
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe 6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Refrigerant flow in cooling
Refrigerant pipe 9.52
(with heat insulator)
MS-GF35VA
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe 6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Refrigerant flow in cooling
Refrigerant pipe 9.52
(with heat insulator)
OBH621A