Mitsubishi ob207 Service Manual
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.
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Models
No. OB207
MSH-07NV MSH-09NV MSH-12NV MSH-18NV MSH-24NV MSH-07NV MSH-09NV MSH-12NV MSH-18NV MSH-24NV MSH-18NV -
(WH)
(WH)
(WH)
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(WH)
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CONTENTS
· MUH-07NV -
· MUH-09NV -
· MUH-12NV -
· MUH-18NV -
· MUH-24NV -
· MUH-07NV -
· MUH-09NV -
· MUH-12NV -
· MUH-18NV -
· MUH-24NV -
· MUH-18NV -
E1E1
E1E1
E1E1
E1E1
E1E1
E2E2
E2E2
E2E2
E2E2
E2E2
E3E3
1. TECHNICAL CHANGES····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································6
4. OUTLINES AND DIMENSIONS ······················ 11
5. WIRING DIAGRAM ··········································15
MSH-18NV MSH-18NV MSH-18NV -
Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- , and MSH-18NVare connected with MXZ-32NV- as multi system units.
E1
E2
E3
E1
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
E3E2E1
1
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
E2E1
E2E1
E2E1
E2E1
E3E2
E3E2
E2E1
E2E1
2
2
PART NAMES AND FUNCTIONS
INDOOR UNIT
MSH-07NV - MSH-07NV MSH-09NV - MSH-09NV MSH-12NV - MSH-12NV -
E1
E1
E1
E2
E2
E2
MSH-18NV MSH-24NV MSH-18NV MSH-24NV MSH-18NV -
E1
E1
E2
E2
E3
(When the front panel is open)
MSH-07NV - MSH-09NV - MSH-12NV MSH-07NV - MSH-09NV - MSH-12NV -
MSH-18NV - MSH-24NV - MSH-18NV MSH-24NV - MSH-18NV -
E3E2
OUTDOOR UNIT
MUH-07NV MUH-09NV MUH-07NV MUH-09NV -
E1
E1
E2
E2
MUH-12NV MUH-18NV MUH-18NV MUH-18NV -
MSH-07NV - MSH-09NV - MSH-12NV -
E1E1E1
MSH-07NV - MSH-09NV - MSH-12NV -
E2E2E2
MSH-18NV - MSH-24NV - MSH-18NV MSH-24NV - MSH-18NV -
E2E1E1
E1
E1
E2
E3
MUH-24NV MUH-24NV -
E3E2
E1E1E1
E2E2E2
E2E1E1
E1
E2
3
MSH-07NV - MSH-09NV - MSH-12NV - MSH-18NV - MSH-18NV -
REMOTE CONTROLLER
E2E1E1E1E1
4
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 -
E1E1
E1E1
E2E2
E2E2
E3E2
5
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
SPECIFICATION
NOTE:Test conditions
Cooling : Indoor DB27°C / WB19°C
Heating : Indoor DB20°C /WB15.5°C
6
Outdoor DB35°C / WB24°C
Outdoor DB 7°C / WB 6°C
Model
Function
Power supply
Capacity
Capacity
Dehumidification
Air flow
Power outlet
Running current
Power input
Auxiliary heater
Electrical data
Power factor
Starting current
Compressor motor current
Fan motor current
Coefficient of performance(C.O.P)
Model
Compressor
Output
Winding resistance(at20:)
Indoor
fan motor
Outdoor
fan motor
Model
Winding resistance(at20:)
Model
Winding resistance(at20:)
Indoor unit
Dimensions
Outdoor unit
Weight
Indoor unit
Outdoor unit
Air direction
Sound level
(Hi)
Fan speed
(Hi)
Special remarks
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:)
MSH-12NV -
Cooling
E1 E2
Heating
Single phase,220-240V,50Hz
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
3.4
1.6
INDOOR 558 OUTDOOR 2130-2244
10
5.75-5.90
1220-1300
5.95-6.10
1260-1350
—
96-92
96-92
35
5.21-5.36
5.41-5.56
INDOOR 0.17 OUTDOOR 0.37
2.78-2.61
3.17-2.96
RH-231VHAT
W
"
1100
C-R2.1 C-S3.9
RC4V19-AA
"
WHT-BLK292 BLK-RED324
RA6V40-EC or EE
"
WHT-BLK130 BLK-RED134.6
mm
mm
mm
mm
mm
mm
kg
kg
815
275
183
850
605
290
8
43
5
dB
dB
rpm
rpm
42
50
1230
780-820
4
1
kg
k"
k"
k"
1.15
10
10
33.18
4.0
—
—
MSH-18NV -
Cooling
E1 E2 E3
Heating
Single phase,220-240V,50Hz
5.1
2.5
5.4
—
INDOOR 756 OUTDOOR 2142
15
9.4-9.2
2030-2120
—
98-96
9.2-9.0
1980-2070
—
98-96
52-58
8.76-8.56
8.56-8.36
INDOOR 0.25 OUTDOOR 0.39
2.51-2.41
2.73-2.61
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
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
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-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
8
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.
Capacity
Capacity
Electrical data
Coefficient of performance(C.O.P)
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Weight
Special remarks
NOTE:Test conditions
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
E1
Model
Function
Power supply
Width
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at25:)
RT12(at25:)
RT61(at0:)
MSH-07NV- (INDOOR UNIT)
E1 E2 E1 E2
Cooling Heating
Single phase,220-240V,50Hz
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
— —
— —
492
10
0.17
35
—
94-86
—
—
0.17
—
—
W
"
—
—
RC4V19-AA
"
WHT-BLK292 BLK-RED324
—
"
mm
mm
mm
mm
mm
mm
kg
kg
—
815
275
183
—
—
—
8
—
5
dB
dB
rpm
rpm
37
—
1,100
—
4
—
kg
k"
k"
k"
—
10
10
—
Please refer to Service manual OB185 for capacity.
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
—
E3E2E1
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
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-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
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
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
10
4
OUTLINES AND DIMENSIONS
MSH-07NV - MSH-09NV - MSH-07NV - MSH-09NV -
INDOOR UNIT
Unit: mm
E2E2E1E1
MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV -
OUTDOOR UNIT
E2E2E1E1
11
MSH-12NV - MSH-12NV -
INDOOR UNIT
E2E1
Unit: mm
9.52
MUH-12NV - MUH-12NV -
OUTDOOR UNIT
E2E1
If the right/left sides or
back side is vacant,the
front has only to be 50cm
unobstructed.
If the front or right/left sides
are vacant, the top has only
to be 10cm unobstructed.
12
MSH-18NV - MSH-24NV - MSH-18NV - MSH-24NV - MSH-18NV -
33 297297
450450
450450
352352438438
254254
2020
6060
4040
150150 648648 217217
55190190
995995
1901907757755050
320320
10151015
17.517.5
160160
5656
4holes 14holes 111✕✕2020
Indoor unitIndoor unit
Installation plateInstallation plate
Power supply cordPower supply cord
Lead to right 2mLead to right 2m
Lead to left 1mLead to left 1m
WWall hole all hole [[7575
Installation plateInstallation plate
Liquid line Liquid line [[8-0.5m8-0.5m
Gas line Gas line [[12-0.43m12-0.43m
Insulation Insulation [[50 O.D50 O.D
[ [28 I.D28 I.D
Insulation Insulation [[2828
Drain hose Drain hose [[1616
Air outAir out
{
Air inAir in
If the right/left sides or
back side is vacant,the
front has only to be 50cm
unobstructed.
If the front or right/left sides
are vacant, the top has only
to be 10cm unobstructed.
INDOOR UNIT
Unit: mm
E3E2E2E1E1
MUH-18NV - MUH-18NV - MUH-18NV -
E3E2E1
OUTDOOR UNIT
13
150
500
E2E1
Service space
500
10
4553
Knock out holes for
power line 2-[27
120
60
R20
R20
25 max.
Standard bolt length
80
65
Front right piping holes-
17
detail figures
MUH-24NV- MUH-24NV- Unit : mm (inch)
200
Note:Allow adequate
upper clearance
10
Front opening
10
Outdoor Unit-Necessary surrounding clearance
362(14-1/4)
1715
185
(7-9/32)
Air intake
500(19-11/16)
185
(7-9/32)
330(13)
39.5 27.5
Air intake
Air outlet
Refrigerant-pipe flared
connection [15.88 5/8F
Refrigerant-pipe flared
connection [9.52 3/8F
850(33-7/16)
553
352
Terminal block for power line
Terminal block for indoor and outdoor unit connection
870(34-1/4)
302
Service panel
Ground
terminal
Handle for moving
Outlet guide
installation hole
Handle for moving
337
403
179 524
441
Knock out hole
for front piping
(refrigerant,drainage
and wiring)
104
2-12✕23 Oval holes
40 60524
33
Knock out hole
for right piping
(refrigerant,drainage
and wiring)
45
42
Bottom
33
(standard bolt M10)
piping hole
Drain hole
R6
2-U-shaped
notched
holes
Drain hole
12
14
7 24(1)295(11-5/8)
200
1000For 10 units or less
The upper side must be open.
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation)
100 10
Handle
for moving
Side air intake
Rear fresh
air intake
23
Rear piping hole
95
138
5
❈
❈
❈
❈
❈
❈
~/N
~
TO OUTDOOR
UNIT
CONNECTING
12VDC
L
3
2
N
;
FOR MULTI SYSTEM
WIRING DIAGRAM
MSH-07NV MSH-09NV -
E1
E1
MODELS WIRING DIAGRAM
INDOOR UNIT
SYMBOL
C11
F12
F11
MF
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
MUH-07NV MUH-09NV -
NAME
E1
E1
MODELS WIRING DIAGRAM
SYMBOL
NR11
RT11
RT12
52C
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
CONTACTOR
NAME NAME
SYMBOL
TB
MV
SR11
TERMINAL BLOCK
VANE MOTOR
SOLID STATE RELAY
OUTDOOR UNIT
❈
❈
❈
❈
❈
NAME
SYMBOL
MF
NR61
RT61
SR61
TB
NAME NAME
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
SYMBOL
C1
C65
52C
F61
MC
NOTE:1. Use copper conductors only.(For field wiring)
COMPRESSOR CAPACITOR
OUTDOOR FAN MOTOR CAPACITOR
CONTACTOR
FUSE(2A)
COMPRESSOR(INNER THERMOSTAT)
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.
3. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
SYMBOL
X62
21S4
IC881
❈❈
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
DC/DC CONVERTER
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
15
MSH-12NV -
E1
MODEL WIRING DIAGRAM
INDOOR UNIT
~/N
FOR MULTI SYSTEM
TO OUTDOOR
UNIT
CONNECTING
SYMBOL
C11
F12
F11
MF
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
NAME
~
12VDC
❈
❈
❈
❈
L
3
2
N
;
SYMBOL
NR11
RT11
RT12
52C
NAME NAME
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
CONTACTOR
❈
❈
SYMBOL
TB
MV
SR11
TERMINAL BLOCK
VANE MOTOR
SOLID STATE RELAY
MUH-12NV -
E1
OUTDOOR UNIT
SYMBOL
C1
C65
52C
F61
MC
COMPRESSOR CAPACITOR
OUTDOOR FAN MOTOR CAPACITOR
CONTACTOR
FUSE(2A)
COMPRESSOR(INNER THERMOSTAT)
MODEL WIRING DIAGRAM
❈
❈
NAME
❈
SYMBOL
NR61
MF
RT61
SR61
TB
❈
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
❈ ❈
NAME NAME
SYMBOL
X62
21S4
IC881
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
DC/DC CONVERTER
NOTE:1. Use copper conductors only.(For field wiring)
2. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
3. Symbols below indicate.
: Terminal block, : Connector
16
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
MSH-18NV -
E1
MODEL WIRING DIAGRAM
INDOOR UNIT
❈
❈
❈
❈
SYMBOL
C11
F12
F11
MF
MV
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
NAME
SYMBOL
NR11
RT11
RT12
IC141
52C
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
❈
❈
NAME NAME
SYMBOL
TB
DSAR
HIC1
TERMINAL BLOCK
SURGE ABSORBER
DC/DC CONVERTER
E1
MUH-18NV -
MODEL WIRING DIAGRAM
OUTDOOR UNIT
❈
❈
❈
SYMBOL
C1
C65
DSAR
F61
MC
NOTE:1. Use copper conductors only.(For field wiring)
COMPRESSOR CAPACITOR
OUTDOOR FAN MOTOR CAPACITOR
SURGE ABSORBER
FUSE(2A)
COMPRESSOR<INNER THERMOSTAT>
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.
3. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
NAME
❈
❈
SYMBOL
MF
NR61
RT61
SR61
TB
NAME NAME
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
SYMBOL
X62
21S4
52C
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
17
MSH-24NV -
INDOOR UNIT
E1
MODEL WIRING DIAGRAM
220-240V~
220-240V~
TO OUTDOOR
UNIT
CONNECTING
POWER
SUPPLY
CORD
~/N 220-240V
50Hz
TB
3
2
L
N
❈
❈
BRN
❈
BLU
RED
WHT
BLU
CIRCUIT BREAKER
GRN/YLW
BLU
RECEIVER
P.C.BOARD
F12
2
1
REMOTE
CONTROLLER
NF
101CN102
3 3
CN
DISPLAY
P.C.BOARD
3
4
BLU
HIC1
WHT
4
52C
❈
3
TRANS
F11
CN201
3
1
CN
151
ELECTRONIC CONTROL P.C BOARD
5
MV
IC141
NR11
CN
112
CN
111
CN
121
CN211
4
C11
2
1
RT12
RT11
3
BRN
YLW
GRY
WHT
MF
RED
BLK
E1
NAME
NAME
SYMBOL
NR11
RT11
RT12
IC141
52C
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
MODEL WIRING DIAGRAM
6
YLW
5
BLK
4
WHT
3
ORN
2
RED
1
RED
F
ORN
RED
TB2
BLU
WHT
DSAR
NAME NAME
12VDC
220-240V~
UNIT
TO INDOOR
CONNECTING
SYMBOL
MF
NR61
RT61
SR61
TB. TB2
MF
TB
3
❈
❈
2
WHT
N
❈
GRN/YLW
OUTDOOR FAN MOTOR
<INNER THERMOSTAT>
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
YLW
BLK
WHT
ORN
RED
WHT
26F1
NAME NAME
X1
1
5
3
RED
BLU
VLT
WHT
VLT
C2
52C1
7
8
CR
X1
YLW
CN730
YLW
WHT
3
2
1
❈
TAB20
BLU
SYMBOL
REVERSING VALVE COIL RELAY
X62
REVERSING VALVE COIL
21S4
CONTACTOR
52C
COMPRESSOR CONTACTOR
52C1
FAN MOTOR RELAY
X1
SYMBOL
C11
F12
F11
MF
MV
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN MOTOR CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
MUH-24NV -
OUTDOOR UNIT
SYMBOL
COMPRESSOR CAPACITOR
C1
OUTDOOR FAN MOTOR CAPACITOR
C2
SURGE ABSORBER 1
DSAR
FUSE(2A)
F61
COMPRESSOR<INNER THERMOSTAT>
MC
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. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
BRN
3
CZ
52C1
1
CN711
52C
❈
4
2
C1
SYMBOL
HIC1
1 2 3
❈
WHT
WHT
RED
BLK
TB
NF
F61
S
SR61
MC
TERMINAL BLOCK
DC/DC CONVERTER
NOISE FILTER
RT61
4
CN661
21S4
BLK
CN721
BLK
X62
IC881
NR61
TRANS
DEICER
P.C. BOARD
C
R
SYMBOL
FUSE(2A)
F
THERMOSTAT (AIR FLOW CONTROL)
26F1
DC/DC CONVERTER
IC881
SURGE ABSORBER 2
CR
SURGE ABSORBER 3
CZ
1.Slide the sleeve.
2.Pull the wire while
NAME
pushing the locking
lever.
18
MSH-07NV - MSH-09NV - MSH-12NV -
INDOOR UNIT
E2E2E2
MODELS WIRING DIAGRAM
TO OUTDOOR
UNIT
CONNECTING
12VDC
220-240V~
POWER
SUPPLY
CORD
~/N 220-240V
50Hz
CIRCUIT BREAKER
TO OUTDOOR
UNIT
CONNECTING
SYMBOL
C11
F12
F11
MF
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN MOTOR CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
TB
L
3
2
N
❈
BLU
FOR MULTI SYSTEM
12VDC
NAME
❈
BRN
❈
❈
GRN/YLW
L
3
2
N
BRN
WHT
BLU
RED
F12
GUARD
PLATE
GRN/YLW
POWER MONITOR,
RECEIVER
P.C.BOARD
BLU
1
BLU
2
1
CN
122
LD101
REMOTE
CONTROLLER
SYMBOL
NR11
RT11
RT12
52C
CN201
3
BLU
5
CN
151
2
1
ELECTRONIC CONTROL P.C BOARD
5
❈
3
❈
4
MV
NAME NAME
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
CONTACTOR
52C
HIC1
TRANS
F11
SR11
NR11
C11
SYMBOL
TB
HIC1
SR11
MV
CN
112
CN
111
CN
121
3
3
2
1
RT12
RT11
BLK
GRY
YLW
BRN
WHT
RED
CN211
TERMINAL BLOCK
DC/DC CONVERTER
SOLID STATE RELAY
VANE MOTOR
1
2
3
MF
4
5
6
MUH-07NV - MUH-09NV -
OUTDOOR UNIT
12VDC
220-240V~
TO INDOOR
UNIT
CONNECTING
E2E2
TB
3
2
N
❈
RED
❈
BLU
❈
WHT
MODELS WIRING DIAGRAM
RT61
1
CN730
TAB20
CN661
IC881
❈
F61
TRANS
52C
4
21S4
BLK
BLK
CN721
X62
NR61
3
❈
DEICER P.C. BOARD
BLU
GRN/YLW
SYMBOL
COMPRESSOR CAPACITOR
C1
FUSE(2A)
F61
COMPRESSOR<INNER THERMOSTAT>
MC
SOLID STATE RELAY
SR61
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. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
NAME
SYMBOL
MF
NR61
RT61
NAME NAME
OUTDOOR FAN MOTOR
<INNER THERMOSTAT>
VARISTOR
DEFROST THERMISTOR
SYMBOL
X62
21S4
52C
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
SR61
X62
C65
CN711
C1
❈❈
RED
1
WHT
2
3
BLK
4
RED
BLK
SYMBOL
MF
WHT
C
MC
S
C65
IC881
TB
R
FAN MOTOR CAPACITOR
DC/DC CONVERTER
TERMINAL BLOCK
1.Slide the sleeve.
2.Pull the wire while
NAME
pushing the locking
lever.
19
MUH-12NV -
E2
OUTDOOR UNIT
TO
MODEL WIRING DIAGRAM
TB
GRN/YLW
3
N
RED
❈
WHT
❈
BLU
❈
CN730
TAB20
12VDC
220-240V~2
INDOOR UNIT
CONNECTING
RT61
CN661 CN721
1
F61
IC881
❈
BLU
TRANS
❈
4
52C
21S4
BLK
BLK
X62
NR61
❈
3
DEICER P.C.BOARD
C1
RED
BLK
SR61
X62
WHT
C65
CN711
MC
S
MF
RED
RED
C
WHT
BLK
R
1
2
3
4
ORN
WHT
BLK
1
2
3
4
SYMBOL
COMPRESSOR CAPACITOR
C1
FUSE(2A)
F61
COMPRESSOR<INNER THERMOSTAT>
MC
SOLID STATE RELAY
SR61
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. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
NAME
SYMBOL
MF
NR61
RT61
NAME NAME
OUTDOOR FAN MOTOR
<INNER THERMOSTAT>
VARISTOR
DEFROST THERMISTOR
SYMBOL
X62
21S4
52C
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
SYMBOL
C65
IC881
TB
NAME
FAN MOTOR CAPACITOR
DC/DC CONVERTER
TERMINAL BLOCK
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
20
MSH-18NV -
E2
MODEL WIRING DIAGRAM
INDOOR UNIT
❈
❈
❈
❈
~/N
FOR MULTI SYSTEM
TO OUTDOOR
UNIT
CONNECTING
SYMBOL
C11
F12
F11
MF
MV
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
NAME
12VDC
L
3
2
N
;
SYMBOL
NR11
RT11
RT12
IC141
52C
NAME NAME
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
❈
❈
SYMBOL
TB
DSAR
HIC1
TERMINAL BLOCK
SURGE ABSORBER
DC/DC CONVERTER
E2
MUH-18NV -
MODEL WIRING DIAGRAM
OUTDOOR UNIT
❈
MF
NR61
RT61
SR61
TB
❈
❈
NAME NAME
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
❈
❈
SYMBOL
C1
C65
DSAR
F61
MC
NOTE:1. Use copper conductors only.(For field wiring)
COMPRESSOR CAPACITOR
OUTDOOR FAN MOTOR CAPACITOR
SURGE ABSORBER
FUSE(2A)
COMPRESSOR<INNER THERMOSTAT>
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.
3. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
NAME
SYMBOL
SYMBOL
X62
21S4
52C
IC881
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
DC/DC CONVERTER
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
21
MSH-24NV -
E2
MODEL WIRING DIAGRAM
INDOOR UNIT
220-240V~
220-240V~
TO OUTDOOR
UNIT
CONNECTING
TB
3
RED
❈
2
WHT
❈
L
BRN
N
❈
BLU
BLU
BLU
F12
NF
2
1
3
4
BLU
CN201
3
1
WHT
POWER
SUPPLY
CORD
~/N 220-240V
50Hz
CIRCUIT BREAKER
RECEIVER
P.C.BOARD
101
CN
3 3
CN
102
DISPLAY
P.C.BOARD
CN
151
ELECTRONIC CONTROL P.C BOARD
5
MV
GRN/YLW
REMOTE
CONTROLLER
SYMBOL
C11
F12
F11
MF
MV
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
MUH-24NV -
OUTDOOR UNIT
NAME
SYMBOL
NR11
RT11
RT12
IC141
52C
E2
MODEL WIRING DIAGRAM
MF
TB
12VDC
220-240V~
TO INDOOR
UNIT
CONNECTING
3
❈
2
❈
F
WHT
N
❈
GRN/YLW
DSAR
NAME NAME
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
X1
6
1
YLW
RED
ORN
BLU
WHT
YLW
BLK
WHT
ORN
RED
TB2
RED
5
4
3
2
1
BLK
WHT
ORN
RED
WHT
26F1
3
A1
VLT
WHT
BLU
5
C2
BLU
VLT
8RED
7
52C1
CR
X1
A2
YLW
WHT
BRN
CN730
3
2
1
❈
TAB20
YLW
3
1 2
C1
4
❈
3
❈
CZ
52C1
52C
F11
CN711
52C
4
❈
WHT
RED
HIC1
TRANS
SYMBOL
1 2 3
F61
WHT
S
BLK
IC141
NR11
TB
NF
HIC1
SR61
MC
CN
112
CN
111
3
CN
121
CN211
4
C11
2
1
TERMINAL BLOCK
NOISE FILTER
DC/DC CONVERTER
RT61
21S4
BLK
BLK
CN721
CN661
4
X62
IC881
NR61
TRANS
DEICER
P.C. BOARD
C
R
BRN
YLW
GRY
WHT
RED
BLK
RT12
RT11
MF
SYMBOL
C1
C2
DSAR
CR
CZ
F61
MC
NOTE:1. Use copper conductors only.(For field wiring)
COMPRESSOR CAPACITOR
FAN MOTOR CAPACITOR
SURGE ABSORBER 1
SURGE ABSORBER 2
SURGE ABSORBER 3
FUSE(2A)
COMPRESSOR<INNER THERMOSTAT>
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.
3. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
NAME
SYMBOL
MF
NR61
RT61
SR61
TB,TB2
F
26F1
NAME NAME
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
FUSE(2A)
THERMOSTAT (AIR FLOW CONTROL)
22
SYMBOL
X62
21S4
52C
52C1
IC881
X1
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
COMPRESSOR CONTACTOR
DC/DC CONVERTER
FAN MOTOR RELAY
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
MSH-18NV -
INDOOR UNIT
E3
MODEL WIRING DIAGRAM
TO OUTDOOR
UNIT
CONNECTING
12VDC
220-240V~
POWER
SUPPLY
CORD
~/N 220-240V
50Hz
CIRCUIT BREAKER
FOR MULTI SYSTEM
TO OUTDOOR
UNIT
CONNECTING
L
3
12VDC
TB
2
N
❈
BRN
❈
❈
❈
BLU
L
3
2
N
BRN
WHT
BLU
F12
RED
BLU
BLU
BRN
GRN/YLW
DSAR
GRN/YLW
RECEIVER
P.C.BOARD
REMOTE
CONTROLLER
2
1
LD1
CN CN
102
101
❈
4
CN201
BLU
3
1
CN
151
ELECTRONIC CONTROL P.C BOARD
52C
❈
3
5
33
MV
DISPLAY
P.C.BOARD
F11
HIC1
TRANS
IC141
NR11
CN
112
CN
121
CN211
4
C11
2
1
CN
111
RT12
3
BRN
YLW
GRY
MF
WHT
RED
BLK
RT11
SYMBOL
C11
F12
F11
MF
MV
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
MUH-18NV -
NAME
E3
MODEL WIRING DIAGRAM
SYMBOL
NR11
RT11
RT12
IC141
52C
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
NAME NAME
OUTDOOR UNIT
RT61
12VDC
220-240V~
INDOOR UNIT
CONNECTING
TO
GRN/YLW
TB
3
❈
RED
❈
2
WHT
N
❈
BLU
WHT
DSAR
CN730
TAB21
TAB20
WHT
CN661
1
F61
❈
IC881
❈
TRANS
DEICER P.C.BOARD
52C
NO
BLU
COM
X62
C1
21S4
BLK
BLK
CN721
NR61
SYMBOL
DSAR
SR61
WHT
RED
BLK
TB
HIC1
52C
VLT
CN720
X62
TERMINAL BLOCK
SURGE ABSORBER
DC/DC CONVERTER
VLT
RED
WHT
BLK
R
1
2
3
4
RED
ORN
WHT
BLK
C65
CN711
MC
S
1
2
3
4
C
MF
SYMBOL
C1
C65
DSAR
F61
MC
NOTE:1. Use copper conductors only.(For field wiring)
COMPRESSOR CAPACITOR
OUTDOOR FAN MOTOR CAPACITOR
SURGE ABSORBER
FUSE(2A)
COMPRESSOR<INNER THERMOSTAT>
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.
3. Symbols below indicate.
: Terminal block, : Connector
4. “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.
NAME
SYMBOL
MF
NR61
RT61
SR61
TB
NAME NAME
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
SYMBOL
X62
21S4
52C
IC881
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
DC/DC CONVERTER
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
23
6
REFRIGERANT SYSTEM DIAGRAM
MSH-07NV MSH-07NV -
INDOOR UNIT
Unit:mm
E1
E2
Refrigerant pipe [ 9.52
(Option)
(with heat insulator)
Muffler
Reversing valve
(4-way valve)
MUH-07NV MUH-07NV -
OUTDOOR UNIT
E1
E2
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Stop valve
Flared connection
Flared connection
Refrigerant pipe [6.35 Stop valve
(Option)
(with heat insulator)
(with service
port)
Accumulator
Strainer
Defrost
thermistor
RT61
Capillary tube
[1.4x850
Check
valve
Strainer
Capillary tube
[1.4x800 (2 pcs)
Capillary tube
[1.6x750
Reversing valve coil
(4-way valve coil)
heating ON
cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
Outdoor
heat
exchanger
Unit:mm
MSH-09NV MSH-09NV -
INDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
E1
E2
Indoor coil
thermistor
RT12
Refrigerant pipe [9.52
(Option)
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe [6.35 Stop valve
(Option)
(with heat insulator)
Muffler
Stop valve
(with service
port)
Accumulator
Strainer
Reversing valve
(4-way valve)
Defrost
thermistor
RT61
Check
valve
Capillary tube
[1.6x1300
MUH-09NV MSH-09NV -
OUTDOOR UNIT
Strainer
Capillary tube
[1.4x800 (2 pcs)
Capillary tube
[1.6x400
Reversing valve coil
(4-way valve coil)
heating ON
cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
E1
E2
Outdoor
heat
exchanger
24
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