Mitsubishi Electric MSH-07NV User manual

SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································6
4. OUTLINES AND DIMENSIONS ······················ 11
5. WIRING DIAGRAM ··········································15
6. REFRIGERANT SYSTEM DIAGRAM··············24
7. PERFORMANCE CURVES······························29
8. MICROPROCESSOR CONTROL ····················33
9. SERVICE FUNCTIONS ····································44
10. TROUBLESHOOTING······································47
11. DISASSEMBLY INSTRUCTIONS·····················60
12. PARTS LIST······················································70
13. OPTIONAL PARTS ····································BACK
Wireless type
Models
MSH-07NV - (WH) · MUH-07NV -
MSH-09NV - (WH) · MUH-09NV -
MSH-12NV - (WH) · MUH-12NV -
MSH-18NV - (WH) · MUH-18NV -
MSH-24NV - (WH) · MUH-24NV -
MSH-07NV - (WH) · MUH-07NV -
MSH-09NV - (WH) · MUH-09NV -
MSH-12NV - (WH) · MUH-12NV -
MSH-18NV - (WH) · MUH-18NV -
MSH-24NV - (WH) · MUH-24NV -
MSH-18NV - (WH) · MUH-18NV -
E3E3
E2E2
E2E2
E2E2
E2E2
E2E2
E1E1
E1E1
E1E1
E1E1
E1E1
No. OB207
MSH-18NV -
MSH-18NV -
MSH-18NV - E3
E2
E1
This Servise Manual OB207 deals with MSH-07/09/12/18/24NV-E1,
MUH-07/09/12/18/24NV-E1, MSH-18NV-E2, and MUH-18NV-E2 in
OB176 REVISED EDITION-A issued in July in1997.
Therefore, please refer to OB207, not to OB176 REVISED
EDITION-A, for the above models.
Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- ,and MSH-18NV-
are connected with MXZ-32NV- as multi system units.
E1
E3E2E1
OB207t-1qxp 25/9/97 8:51 PM Page 1

2
TECHNICAL CHANGES
MSH-17NV - ➔MSH-07NV -
1. Indoor electronic control P.C.board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
MSH-09NV - ➔MSH-09NV -
1. Indoor electronic control P.C.board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
MSH-12NV - ➔MSH-12NV -
1. Indoor electronic control P.C.board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
MSH-18NV - ➔MSH-18NV -
1. Indoor electronic control P.C.board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
MSH-24NV - ➔MSH-24NV -
1. Indoor electronic control P.C.board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
E2E1
E2E1
E3E2
E3E2
E2E1
E2E1
E2E1
E2E1
E2E1
E2E1
1
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3
PART NAMES AND FUNCTIONS
2
INDOOR UNIT
MSH-07NV - MSH-07NV -
MSH-09NV - MSH-09NV -
MSH-12NV - MSH-12NV - E2
E1
E2
E1
E2
E1






OUTDOOR UNIT
MUH-12NV -
MUH-18NV -
MUH-18NV -
MUH-18NV - E3
E2
E1
E1 MUH-24NV -
MUH-24NV - E2
E1
MUH-07NV -
MUH-09NV -
MUH-07NV -
MUH-09NV - E2
E2
E1
E1
(When the front panel is open)
MSH-07NV - MSH-09NV - MSH-12NV -
MSH-07NV - MSH-09NV - MSH-12NV - E2E2E2
E1E1E1
MSH-18NV - MSH-24NV - MSH-18NV -
MSH-24NV - MSH-18NV - E3E2
E2E1E1
MSH-18NV - MSH-24NV - MSH-18NV -
MSH-24NV - MSH-18NV - E3E2
E2E1E1
MSH-18NV -
MSH-24NV -
MSH-18NV -
MSH-24NV -
MSH-18NV - E3
E2
E2
E1
E1
MSH-07NV - MSH-09NV - MSH-12NV -
MSH-07NV - MSH-09NV - MSH-12NV - E2E2E2
E1E1E1
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4
REMOTE CONTROLLER
MSH-07NV - MSH-09NV - MSH-12NV - MSH-18NV - MSH-18NV - E2E1E1E1E1
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5
MSH-07NV - (Serial number 7000201T~) MSH-09NV - (Serial number 7000201T~)
MSH-12NV - (Serial number 7000001T~) MSH-24NV -
MSH-07NV - MSH-09NV -
MSH-12NV - MSH-18NV - (Serial number 7000001T~)
MSH-24NV - MSH-18NV - E3E2
E2E2
E2E2
E1E1
E1E1
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6
SPECIFICATION
3
Capacity
Electrical data
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Weight
Special remarks
Model
Function
Power supply
Coefficient of performance(C.O.P)
Capacity
Dehumidification
Air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding resistance(at20:)
Model
Winding resistance(at20:)
Model
Winding resistance(at20:)
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Air direction
Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator
Refrigerant filling capacity(R-22)
Thermistor
Width
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at25:)
RT12(at25:)
RT61(at0:)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"

"
mm
mm
mm
mm
mm
mm
kg
kg
dB
dB
rpm
rpm
kg
k"
k"
k"
MSH-07NV - E1 E2
Single phase,220-240V,50Hz
INDOOR 492 OUTDOOR 1620
10
98-98
25
INDOOR 0.17 OUTDOOR 0.33
RH-135VGHT
650
C-R4.17 C-S5.75
RC4V19-AA
WHT-BLK292 BLK-RED324
RA6V29-CB
WHT-BLK218.0 BLK-RED423.7
815
275
183
780
540
255
8
34
5
37
47
1,100
790-820
4
1
0.85
10
10
33.18
MSH-09NV - E1 E2
Single phase,220-240V,50Hz
INDOOR 492 OUTDOOR 1620
10
25
INDOOR 0.17 OUTDOOR 0.33
RH-174VGHT
800
C-R3.26 C-S5.82
RC4V19-AA
WHT-BLK292 BLK-RED324
RA6V29-CB
WHT-BLK218.0 BLK-RED423.7
815
275
183
780
540
255
8
34
5
37
48
1,100
790-820
4
1
0.85
10
10
33.18
Cooling
2.2
0.8
3.30-3.20
710-750
—
2.80-2.70
3.10-2.93
Heating
2.5
—
3.15-3.05
680-720
—
2.65-2.55
3.68-3.47
Cooling
2.5
1.1
4.10-4.00
880-920
—
98-96
3.60-3.50
2.84-2.72
Heating
3.1
—
4.30-4.10
920-940
—
97-96
3.80-3.60
3.37-3.30
NOTE:Test conditions
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB24°C
Heating : Indoor DB20°C /WB15.5°C
Outdoor DB 7°C / WB 6°C
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7
Capacity
Electrical data
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Weight
Special remarks
Model
Function
Power supply
Coefficient of performance(C.O.P)
Capacity
Dehumidification
Air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding resistance(at20:)
Model
Winding resistance(at20:)
Model
Winding resistance(at20:)
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Air direction
Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator
Refrigerant filling capacity(R-22)
Thermistor
Width
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at25:)
RT12(at25:)
RT61(at0:)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"

"
mm
mm
mm
mm
mm
mm
kg
kg
dB
dB
rpm
rpm
kg
k"
k"
k"
MSH-12NV - E1 E2
Single phase,220-240V,50Hz
INDOOR 558 OUTDOOR 2130-2244
10
35
INDOOR 0.17 OUTDOOR 0.37
RH-231VHAT
1100
C-R2.1 C-S3.9
RC4V19-AA
WHT-BLK292 BLK-RED324
RA6V40-EC or EE
WHT-BLK130 BLK-RED134.6
815
275
183
850
605
290
8
43
5
42
50
1230
780-820
4
1
1.15
10
10
33.18
MSH-18NV - E1 E2 E3
Single phase,220-240V,50Hz
INDOOR 756 OUTDOOR 2142
15
52-58
INDOOR 0.25 OUTDOOR 0.39
NH-36VMDT
1700
C-R1.2 C-S2.7
RA4V27-EA
WHT-BLK183.8 BLK-RED250.5
RA6V50-OD or OF
WHT-BLK116.4 BLK-RED111.0
1015
320
190
850
605
290
14
59
5
42
52
1180
810-845
4
1
1.8
10
10
33.18
Cooling
3.4
1.6
5.75-5.90
1220-1300
—
96-92
5.21-5.36
2.78-2.61
Heating
4.0
—
5.95-6.10
1260-1350
—
96-92
5.41-5.56
3.17-2.96
Cooling
5.1
2.5
9.4-9.2
2030-2120
—
98-96
8.76-8.56
2.51-2.41
Heating
5.4
—
9.2-9.0
1980-2070
—
98-96
8.56-8.36
2.73-2.61
NOTE:Test conditions
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB24°C
Heating : Indoor DB20°C /WB15°.5C
Outdoor DB 7°C / WB 6°C
OB207t-1qxp 25/9/97 8:51 PM Page 7

8
Capacity
Electrical data
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Weight
Special remarks
Model
Function
Power supply
Coefficient of performance(C.O.P)
Capacity
Dehumidification
Air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding resistance(at20:)
Model
Winding resistance(at20:)
Model
Winding resistance(at20:)
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Air direction
Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator
Refrigerant filling capacity(R-22)
Thermistor
Width
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at25:)
RT12(at25:)
RT61(at0:)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"

"
mm
mm
mm
mm
mm
mm
kg
kg
dB
dB
rpm
rpm
kg
k"
k"
k"
MSH-24NV - E1 E2
Cooling Heating
Single phase,220-240V,50Hz
6.0 6.2
3.1 —
816
25
12.6-11.7 11.5-11.0
2720-2750 2470-2580
—
98
59
11.73-10.83 10.63-10.13
INDOOR 0.29 OUTDOOR 0.58
2.21-2.18 2.51-2.40
NH-47VMDT
2200
C-R 0.96 C-S 2.07
RA4V27-EC
WHT-BLK183.8 BLK-RED250.5
RA6V85-AA
WHT-BLK62.7 BLK-YLW30.2 YLW-RED62.9
1015
320
190
870
850
295
14
72
5
45
53
1,260
720-750
4
2
2.4
10
10
33.18
NOTE:Test conditions
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB24°C
Heating : Indoor DB20°C /WB15.5°C
Outdoor DB 7°C / WB 6°C
OB207t-1qxp 25/9/97 8:51 PM Page 8

9
Capacity
Electrical data
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Weight
Special remarks
Model
Function
Power supply
Coefficient of performance(C.O.P)
Capacity
Dehumidification
Air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding resistance(at20:)
Model
Winding resistance(at20:)
Model
Winding resistance(at20:)
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Air direction
Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator
Refrigerant filling capacity(R-22)
Thermistor
Width
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at25:)
RT12(at25:)
RT61(at0:)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"

"
mm
mm
mm
mm
mm
mm
kg
kg
dB
dB
rpm
rpm
kg
k"
k"
k"
MSH-07NV- (INDOOR UNIT)
Cooling Heating
Single phase,220-240V,50Hz
— —
— —
492
10
0.17
35
—
94-86
—
—
0.17
—
—
—
—
RC4V19-AA
WHT-BLK292 BLK-RED324
—
—
815
275
183
—
—
—
8
—
5
37
—
1,100
—
4
—
—
10
10
—
MSH-09NV- (INDOOR UNIT)
Cooling Heating
Single phase,220-240V,50Hz
— —
— —
492
10
0.17
35
—
94-86
—
—
0.17
—
—
—
—
RC4V19-AA
WHT-BLK292 BLK-RED324
—
—
815
275
183
—
—
—
8
—
5
37
—
1,100
—
4
—
—
10
10
—
E1 E2 E1 E2
Please refer to Service manual OB185 for capacity.
NOTE:Test conditions
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB24°C
Heating : Indoor DB20°C /WB15.5°C
Outdoor DB 7°C / WB 6°C
Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- ,and MSH-18NV- are
connected with MXZ-32NV- as multi system units.
E1
E3E2E1
OB207t-1qxp 25/9/97 8:51 PM Page 9

10
Capacity
Electrical data
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Weight
Special remarks
Model
Function
Power supply
Coefficient of performance(C.O.P)
Capacity
Dehumidification
Air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding resistance(at20:)
Model
Winding resistance(at20:)
Model
Winding resistance(at20:)
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Air direction
Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator
Refrigerant filling capacity(R-22)
Thermistor
Width
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at25:)
RT12(at25:)
RT61(at0:)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"

"
mm
mm
mm
mm
mm
mm
kg
kg
dB
dB
rpm
rpm
kg
k"
k"
k"
MSH-12NV- (INDOOR UNIT)
Cooling Heating
Single phase,220-240V,50Hz
— —
—
558
10
0.17
35
—
94-86
—
—
0.17
—
—
—
—
RA4V19-AA
WHT-BLK292 BLK-RED324
—
—
815
275
183
—
—
—
8
—
5
42
—
1,230
—
4
—
—
10
10
—
MSH-18NV- (INDOOR UNIT)
Cooling Heating
Single phase,220-240V,50Hz
— —
—
756
10
0.28
60
—
97-89
—
—
0.25
—
—
—
—
RA4V27-EA
WHT-BLK184 BLK-RED251
—
—
1015
320
190
—
—
—
14
—
5
42
—
1,180
—
4
—
—
10
10
—
Please refer to Service manual OB185 for capacity.
E1 E2 E2 E3
NOTE:Test conditions
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB24°C
Heating : Indoor DB20°C /WB15.5°C
Outdoor DB 7°C / WB 6°C
Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- ,and MSH-18NV- are
connected with MXZ-32NV- as multi system units.
E1
E3E2E1
OB207t-1qxp 25/9/97 8:51 PM Page 10