Mitsubishi Electric MU-GA50VB User manual

CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································3
4. NOISE CRITERIA CURVES·······························5
5. OUTLINES AND DIMENSIONS ·························6
6. WIRING DIAGRAM ············································7
7. REFRIGERANT SYSTEM DIAGRAM················9
8. PERFORMANCE CURVES······························12
9.TROUBLESHOOTING·······································20
10. DISASSEMBLY INSTRUCTIONS·····················28
11. PARTS LIST······················································32
12. RoHS PARTS LIST···········································34
MU-GA50VB -
MU-GA60VB -
MU-GA80VB - A1
A1
A1
SPLIT-TYPE, AIR CONDITIONERS
MU-GA50VB
NOTE:
• This service manual describes technical data of outdoor units.
• RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
No. OB464
OUTDOOR UNIT
SERVICE MANUAL
Wireless type
Models
HFC
utilized
R410A
Indoor unit service manual
MS-GA·VB (OB463)
OB464-1.qxp 06.7.11 4:23 PM Page 1

TECHNICAL CHANGES
2
1
MU-A18WV - ➔MU-GA50VB -
1. Model name has been changed.
Indication of capacity has been changed. (BTU➔ kW)
2. Valve cover has been added.
3. Fan motor has been changed. (RA6V50-OG➔RA6V60-MA)
MU-A24WV - ➔MU-GA60VB -
1. Model name has been changed.
Indication of capacity has been changed. (BTU➔ kW)
2. Compressor has been changed. (NN29VBAHT➔NN25VBAHT)
3. Capillary tubes have been changed to LEV.
4. Fan speed regulator has been changed. (1 speed ➔2 speed)
5. Outdoor fan motor has been changed. (RA6V60-MA ➔RA6V75-AD)
6. Ambient temperature thermistor has been added.
7. Outdoor unit size has been changed. (W 850 mm x H 605 mm x D 290 mm ➔ W 840 mm x H 850 mm x D 330 mm)
MU-A30WV - ➔MU-GA80VB -
1. Model name has been changed.
Indication of capacity has been changed. (BTU➔ kW)
2. Compressor has been changed. (NN37VAAHT➔NN33VACHT)
A1A1
A1A1
A1A1
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3
PART NAMES AND FUNCTIONS
2
Drainage hose
Piping
Air inlet Air inlet
Air outlet
Drain outlet
(back and side)
Air outlet
(back and side)
OUTDOOR UNIT
MU-GA50VB MU-GA60VB
MU-GA80VB
SPECIFICATION
3
Outdoor model
Function
Power supply
Capacity
Dehumidification
Air flow(High/ Low)
Power outlet
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Maximum current
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level(High)
Fan speed(High)
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigeration oil (Model)
kW
L/h
K/h
A
A
W
%
A
A
A
A
W
"
"
mm
kg
dB
rpm
kg
L
MU-GA50VB
Cooling
Single phase
230V, 50Hz
5.1
1.4
2,322/ –
15
7.69
1,681
95
37
7.14
0.55
11.5
2.91
RN196VHSHT
1,300
C-R 1.80
C-S 3.00
RA6V60-MA
WHT-BLK 71
BLK-RED 89
850o605o290
45
52
873
1
1.60
0.52(NEO22)
MU-GA60VB
Cooling
Single phase
230V, 50Hz
6.5
2.3
2,940/1,470
25
10.09
2,251
97
45 or less
9.52
0.57
15.0
2.80
NN25VBAHT
1,600
C-R 0.89
C-S 2.03
RA6V75-AD
WHT-BLK 62.8 BLK-YLW 55.9
YLW-RED 26.0
840o850o330
73
55/53
805/435
2
2.40
1.20(NEO22)
Electrical data
Compressor
Fan motor
Special remarks
Coefficient of performance(C.O.P)
Capacity
NOTE: Test conditions are based on AZ/NZS 3823.1.1.
Cooling : Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Indoor-Outdoor piping length : 7.5m
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4
Outdoor model
Function
Power supply
Capacity
Dehumidification
Air flow(High/Low)
Power outlet
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Maximum current
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level(High/Low)
Fan speed(High/Low)
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigeration oil (Model)

kW
L/h
K/h
A
A
W
%
A
A
A
A
W
"


"
mm
kg
dB
rpm
kg
L
MU-GA80VB
Cooling
Single phase
230V, 50Hz
7.8
3.5
2,940/1,470
25
12.91
2,881
97
45 or less
12.34
0.57
20.0
2.64
NN33VACHT
2,200
C-R 0.68
C-S 1.80
RA6V75-AD
WHT-BLK 62.8 BLK-YLW 55.9
YLW-RED 26.0
840o850o330
75
55/53
805/435
2
2.40
1.30(NEO 22)
Electrical data
Compressor
Fan motor
Special remarks
Coefficient of performance(C.O.P)
Capacity
NOTE: Test conditions are based on AZ/NZS 3823.1.1.
Cooling : Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Indoor-Outdoor piping length : 7.5m
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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-70
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
52
SPL(dB(A)) LINE
High
FAN SPEED
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB=20µPa
MU-GA50VB
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
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
55
SPL(dB(A)) LINE
High
FAN SPEED
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB=20µPa
MU-GA60VB MU-GA80VB
OUTDOOR UNIT
MICROPHONE
1m
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6
OUTLINES AND DIMENSIONS
5
MU-GA60VB MU-GA80VB
OUTDOOR UNIT
Unit: mm
OUTDOOR UNIT
MU-GA50VB
100
157
161
Liquid refrigerant
pipe joint
Refrigerant pipe
(Flared) [6.35
Service panel
183
500
850
30
50
20350
35
248
605
292
20
310 290
345
Air in
Air out
Drainage
3holes [33
50
90
Air in
Drainage
hole [16.2
355
81
74
30-
35-
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [12.7
100mm or more
350mm or more
100mm or more
100mm or more
REQUIRED SPACE
500mm or more
30-
35-
155
90
198
40
515
299
66
34
51
330
360
850
430
500 80
121
840
Open as a rule
500mm or more if
the front and both
sides are open
100mm or more
200mm or more if
there are obstacles
to both sides
Open as a rule
500mm or more if the back,
both sides and top are open 350mm or more
100mm or more
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [15.88
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [9.52 (MU-GA80VB)
[6.35 (MU-GA60VB)
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7
WIRING DIAGRAM
6
MU-GA50VB
OUTDOOR UNIT
BRN
WHT
WHT
POWER SUPPLY
230V 50Hz
~/N
TB1
CIRCUIT BREAKER
PE
BLU
N
GRN/YLW
BRN
L
NO COM
52C
TB2
CONNECTING
12V
INDOOR UNIT
TO
BLK
1
WHT
2
52C
C2
4
WHT
ORN
RED
2
3
1
RED
C1
BLK
BLK
ORN
WHT
RED
MF
R
MC
S
C
DSAR
BLU
1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring)
3.Symbols below indicate. : Connector
: Terminal block
NOTES:
SYMBOL
C1
C2
DSAR
NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
SYMBOL
MC
MF
TB1,TB2
NAME
COMPRESOR (INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
TERMINAL BLOCK
SYMBOL
52C NAME
COMPRESSOR CONTACTOR
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8
OUTDOOR UNIT
CT
R
C
C1
BLK
RED MC
S
WHT
GRN
BLU
BRN
BLU
BRN
LD82
LD83
LD80
LD81
LDE 52C
21
LEV
6 5 4 3
RED ORN
12
321
RT63RT62 MF
6
CN662 CN724 CN711
X52 TAB52
F61
NO
COM
SR61
SR62
BRN
BLU
X52
POWER SUPPLY
~/N 230V 50Hz
GRN/YLW
TB1
BLU
5
3
NR61
BLU
RED
TO INDOOR UNIT CONNECTING
12V
DSAR
52C
BLU A2A1
ORN C2
RED
CIRCUIT BREAKER
WHT BLK
YLW
CN730
1
7
TB2
BRN
WHT BLK
YLW
T61
DEICER
P.C. BOARD
NOISE FILTER PC BOARD
P E
L
N
N
3
SYMBOL
SR62
TB1
TB2
T61
X52
52C
SYMBOL
MC
MF
NR61
RT62
RT63
SR61
SYMBOL
CT
C1
C2
DSAR
F61
LEV
NAME NAME NAME
CURRENT TRANS
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(T3.15AL250V)
EXPANSION VALVE COIL
COMPRESSOR (INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
VARISTOR
DISCHARGE TEMPERATURE THERMISTOR
AMBIENT TEMPERATURE THERMISTOR
SOLID STATE RELAY
SOLID STATE RELAY
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
CONTACTOR
SOFT START RELAY
NOTE 1. Use copper conductors only (For field wiring).
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N).
3. Symbols below indicate.
/: Terminal block, : Connector
MU-GA60VB MU-GA80VB
OB464-1.qxp 06.7.11 4:23 PM Page 8

9
REFRIGERANT SYSTEM DIAGRAM
7
MU-GA50VB
OUTDOOR UNIT Unit:mm
Muffler
Refrigerant pipe [12.7
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe[6.35
(with heat insulator)
Stop
valve
Compressor
Stop valve
(with service
port) Outdoor
heat
exchanger
Refrigerant flow in cooling
Oil separator
Capillary tube
[3.0o[1.6o350
Capillary tube
[2.5o[0.6o1,000
Strainer
#100
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10
MU-GA60VB MU-GA80VB
OUTDOOR UNIT
Unit:mm
Indoor
unit
Max. Height
difference
B
A
Max. length
Outdoor unit
MAX. HEIGHT DIFFERENCE
MAX. REFRIGERANT PIPING LENGTH
Outdoor
heat
exchanger
Flared connection Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
[3.6✕[2.4✕50 Refrigerant flow in cooling
Compressor
Refrigerant pipe [15.88
(with heat insulator)
[9.52
(MU-GA80VB)
[6.35 (MU-GA60VB)
LEV
Muffler
Muffler
Strainer
Ambient
temperature
thermistor
RT63
Capillary tube
[4.0✕[2.4✕200
(Upper path) Capillary tube
[4.0✕[2.4✕100
(Lower path)
Refrigerant pipe
(with heat insulator)
Model Piping size O.D : mm
Refrigerant piping : m
Gas
12.7
15.88
Liquid
6.35
9.52
MU-GA50VB
MU-GA60VB
MU-GA80VB
Max. length
A
Max. Height
difference
B
25
30
10
15
OB464-1.qxp 06.7.11 4:23 PM Page 10