Mitsubishi Electric MS-07NV -E1 (WH) 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 ·························9
5. WIRING DIAGRAM ··········································12
6. REFRIGERANT SYSTEM DIAGRAM··············20
7. PERFORMANCE CURVES······························24
8. MICROPROCESSOR CONTROL ····················27
9. SERVICE FUNCTIONS ····································34
10. TROUBLESHOOTING······································37
11. DISASSEMBLY INSTRUCTIONS·····················45
12. PARTS LIST······················································53
13. OPTIONAL PARTS···········································61
Wireless type
Models
MS-07NV - (WH) · MU-07NV -
MS-09NV - (WH) · MU-09NV -
MS-12NV - (WH) · MU-12NV -
MS-18NV - (WH) · MU-18NV -
MS-24NV - (WH) · MU-24NV -
MS-07NV - (WH) · MU-07NV -
MS-09NV - (WH) · MU-09NV -
MS-12NV - (WH) · MU-12NV -
MS-18NV - (WH) · MU-18NV -
MS-24NV - (WH) · MU-24NV -
MS-18NV - (WH) · MU-18NV - E3E3
E2E2
E2E2
E2E2
E2E2
E2E2
E1E1
E1E1
E1E1
E1E1
E1E1
No. OB206
MS-18NV -
MS-24NV -
MS-18NV -
MS-24NV -
MS-18NV - E3
E2
E2
E1
E1
This Servise Manual OB206 deals with MS-07/09/12/18/24NV-E1,
MU-07/09/12/18/24NV-E1, MS-18NV-E2, and MU-18NV-E2 in
OB175 THIRD EDITION issued in June in 1997.
Therfore, please refer to OB206, not to OB175 THIRD EDITION,
for the above models.
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2
TECHNICAL CHANGES
MS-07NV - ➔MS-07NV -
1. Indoor electronic control P.C. board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
MS-09NV - ➔MS-09NV -
1. Indoor electronic control P.C. board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
3. Refrigerant filling capacity (R-22) has changed. (900g ➔850g)
MS-12NV - ➔MS-12NV -
1. Indoor electronic control P.C. board has changed.
However, it is compatible between and models.
Auto restart function is added.
MS-18NV - ➔MS-18NV -
1. Indoor electronic control P.C. board has changed.
However, it is compatible between and models.
2. Auto restart function is added.
MS-24NV - ➔MS-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
MS-07NV - MS-09NV - MS-12NV -
MS-07NV - MS-09NV - MS-12NV - E2E2E2
E1E1E1
OUTDOOR UNIT
MU-12NV - MU-18NV -
MU-24NV - MU-12NV -
MU-18NV - MU-24NV -
MU-18NV - E3
E2E2
E2E1
E1E1
MU-07NV- MU-09NV -
MU-07NV- MU-09NV - E2E2
E1E1
(When the front panel is open)
MS-07NV - MS-09NV - MS-12NV -
MS-07NV - MS-09NV - MS-12NV - E2E2E2
E1E1E1 MS-07NV - MS-09NV - MS-12NV -
MS-07NV - MS-09NV - MS-12NV - E2E2E2
E1E1E1
MS-18NV - MS-24NV -
MS-18NV - MS-24NV - MS-18NV - E3E2E2
E1E1 MS-18NV - MS-24NV -
MS-18NV - MS-24NV - MS-18NV - E3E2E2
E1E1
MS-18NV -
MS-24NV -
MS-18NV -
MS-24NV -
MS-18NV - E3
E2
E2
E1
E1
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4
REMOTE CONTROLLER
MS-07NV - MS-09NV - MS-12NV -
MS-18NV - MS-24NV - MS-18NV - E2E1E1
E1E1E1
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5
MS-07NV - (Product number 7000001T~) MS-09NV - (Product number 7000001T~)
MS-12NV - (Product number 7000001T~) MS-24NV - (Product number 7000001T~)
MS-07NV - MS-09NV -
MS-12NV - MS-18NV - (Product number 7000001T~)
MS-24NV - MS-18NV - E3E2
E2E2
E2E2
E1E1
E1E1
OB206t-1.qxp 25/9/97 6:43 PM Page 5

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:)
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"
MS-07NV - E1 E2
Cooling
2.2
0.8
3.15-3.05
680-710
98-97
2.69-2.59
3.24-3.10
RH-135VGHT
650
C-R 4.17 C-S 5.75
0.65
MS-09NV - E1
Cooling
2.5
1.1
3.60-3.45
780-810
98-98
3.15-2.99
3.21-3.09
RH-145VGHT
700
C-R 4.04 C-S 5.96
0.9
815
275
183
780
540
255
8
32
5
37
44-45
1,100
740-770
4
1
10
10
Single phase,220-240V,50Hz
INDOOR 492 OUTDOOR 1620
10
—
25
INDOOR 0.17 OUTDOOR 0.29
RC4V19-AA
WHT-BLK292.4 BLK-RED324.6
RA6V23-AB
WHT-BLK268.4 BLK-RED390.8
6
NOTE:Test conditions
Cooling : Indoor DB27:/ WB19:
Outdoor DB35:/ WB24:
SPECIFICATION
3
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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:)
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"
MS-09NV - E2
Cooling
2.5
1.1
INDOOR 492 OUTDOOR 1620
3.60-3.45
780-810
98-98
25
3.15-2.99
INDOOR 0.17 OUTDOOR 0.29
3.21-3.09
RH-145VGHT
700
C-R 4.04 C-S 5.96
RA6V23-AB
WHT-BLK268.4 BLK-RED390.8
780
540
255
32
37
44-45
1,100
740-770
0.65
815
275
183
8
5
4
1
10
10
MS-12NV - E1 E2
Cooling
3.5
1.6
INDOOR 558 OUTDOOR 2190-2304
6.20-6.35
1310-1390
96-91
35
5.66-5.81
INDOOR 0.17 OUTDOOR 0.37
2.67-2.52
RH-231VHAT
1,100
C-R 2.11 C-S 3.97
RA6V40-EC or EE
WHT-BLK130.4 BLK-RED134.6
850
605
290
38
42
50
1,230
780-820
0.8
RC4V19-AA
WHT-BLK292.4 BLK-RED324.6
—
10
Single phase,220-240V,50Hz
NOTE:Test conditions
Cooling : Indoor DB27:/ WB19:
Outdoor DB35:/ WB24:
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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:)
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"
MS-18NV - E1 E2 E3 MS-24NV - E1 E2
Single phase,220-240V,50Hz
—
WHT-BLK183.8 BLK-RED250.5
1,015
320
190
850
605
290
14
5
4
10
10
Cooling
6.4
3.4
INDOOR 816 OUTDOOR 2286
25
12.9-12.6
2,780-2,900
98-96
59
12.06-11.76
INDOOR 0.29 OUTDOOR 0.55
2.30-2.21
NH-47VMDT
2,200
C-R0.96 C-S 2.07
RA4V27-EC
RA6V60-AA or AB
WHT-BLK81.1 BLK-RED102.2 BLK-YLW 92.2
61
45
53
1,260
860-886
2
2.15
Cooling
5.1
2.5
INDOOR 756 OUTDOOR 2190
15
9.1
1,910-2,010
95-92
51-55
8.46
INDOOR 0.25 OUTDOOR 0.39
2.67-2.54
NH-33VMDT
1,500
C-R1.2 C-S 2.7
RA4V27-EA
RA6V50-OD or OF
WHT-BLK116.4 BLK-RED111
55
42
52
1,180
810-845
1
1.65
NOTE:Test conditions
Cooling : Indoor DB27:/ WB19:
Outdoor DB35:/ WB24:
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9
OUTLINES AND DIMENSIONS
4
MS-07NV - MS-09NV -
MS-07NV - MS-09NV - E2E2
E1E1
MU-07NV - MU-09NV -
MU-07NV - MU-09NV - E2E2
E1E1
INDOOR UNIT
OUTDOOR UNIT
Unit : mm
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10
MS-12NV - MS-12NV - E2E1
MU-12NV - MU-12NV - E2E1
INDOOR UNIT
OUTDOOR UNIT
{
12.7
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.
Unit : mm
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11
MS-18NV - MS-24NV -
MS-18NV - MS-24NV - MS-18NV - E3E2E2
E1E1
MU-18NV - MU-24NV -
MU-18NV - MU-24NV - MU-18NV - E3E2E2
E1E1
OUTDOOR UNIT
INDOOR UNIT
33297297
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
Wireless remote controllerWireless remote controller
Power supply cordPower supply cord
Lead to right 2mLead to right 2m
Lead to left 1mLead to left 1m
WWall holeall hole [[7575
Installation plateInstallation plate
Liquid lineLiquid line [[8-0.5m8-0.5m
Gas lineGas line [[12-0.43m12-0.43m
InsulationInsulation [[50 O.D50 O.D
[[28 I.D28 I.D
InsulationInsulation [[2828
Drain hoseDrain 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.
Unit : mm
OB206t-1.qxp 25/9/97 6:43 PM Page 11

MS-07NV -
MS-09NV - E1
E1
MU-07NV - E1
MU-09NV - E1
MODELS WIRING DIAGRAM
MODELS WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
SYMBOL
C11
F12
F11
MF
SYMBOL
NR11
RT11
RT12
HIC1
SYMBOL
TB
MV
SR11
52C
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VARISTOR
ROOMTEMPERATURE THERMISTOR
INDOOR COILTHERMISTOR
DC/DC CONVERTER
TERMINAL BLOCK
VANE MOTOR
SOLID STATE RELAY
CONTACTOR
❈
❈
SYMBOL
C1
C2
SYMBOL
MF
MC
SYMBOL
TB
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR OUTDOOR FAN MOTOR
COMPRESSOR (INNERTHERMOSTAT)
TERMINAL BLOCK
FUSE (2A)
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
❈
❈
❈
❈
❈
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
12
WIRING DIAGRAM
5
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13
MS-12NV - E1
MU-12NV - E1
MODEL WIRING DIAGRAM
MODEL WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
SYMBOL
C11
F12
F11
MF
SYMBOL
NR11
RT11
RT12
HIC1
SYMBOL
TB
MV
SR11
52C
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VARISTOR
ROOMTEMPERATURE THERMISTOR
INDOOR COILTHERMISTOR
DC/DC CONVERTER
TERMINAL BLOCK
VANE MOTOR
SOLID STATE RELAY
CONTACTOR
❈
❈
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
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
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
❈
❈
❈❈
❈
SYMBOL
C1
C2
SYMBOL
MF
MC
SYMBOL
TB
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR OUTDOOR FAN MOTOR
COMPRESSOR (INNER THERMOSTAT)
TERMINAL BLOCK
FUSE(2A)
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14
MS-18NV - E1
MU-18NV - E1
MODEL WIRING DIAGRAM
MODEL WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
BRN
DSAR
GRN/YLW
LD1
REMOTE
CONTROLLER
3
1
DISPLAY
P.C.BOARD
101
CN 102 CN 151
CN 111
CN
ELECTRONIC CONTROL P.C BOARD
4
2
1
C11
CN211
BLK
RECEIVER
P.C.BOARD
BLK
WHT
GRY
RED
RT11
MV
5
F11
3 3
BLK MF
3
121
CN
CN
112
50Hz
CORD
POWER
SUPPLY
TO OUTDOOR
UNIT
CONNECTING
BRN
L
N
GRN/YLW
TB
NR11
IC141
52C
BRN
2
RT12
YLW
BRN
4
3
CN201
1
2
F12
WHT
BLU
BLK
BLK
220-240V
1~
SYMBOL
TB
DSAR
SYMBOL
NR11
RT11
RT12
IC141
52C
SYMBOL
C11
F12
F11
MF
MV
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
TERMINAL BLOCK
SURGE ABSORBER
TB
GRN / YLW
2
N
WHT
BLK
TO INDOOR UNIT
CONNECTING C
R
S
C2
C1
WHT
BLK
RED
ORN
MC
MF
WHT
BLK
RED
ORN
RED
BLK
1
2
3
4
SYMBOL
C1
C2
SYMBOL
MF
MC
SYMBOL
TB
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR OUTDOOR FAN MOTOR
COMPRESSOR (INNERTHERMOSTAT)
TERMINAL BLOCK
FUSE (2A)
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
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
❈
❈
❈
❈
❈
❈
❈
❈
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15
MS-24NV - E1
MU-24NV - E1
MODEL WIRING DIAGRAM
MODEL WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
52C
CIRCUIT BREAKER
RT12
IC141 112
CN
HIC1
NR11
TRANS
1
220-240V~
WHT
220-240V~
WHT
DSAR
GRN/YLW
LD1
REMOTE
CONTROLLER
3
1
DISPLAY
P.C.BOARD
101
CN 102
CN 151
CN 111
CN
ELECTRONIC CONTROL P.C BOARD
4
2
1
C11
CN211
BLU
RECEIVER
P.C.BOARD
BLK
WHT
GRY
RED
RT11
MV
5
F11
3 3
BLU MF
3
121
CN
50Hz
~/N 220-240V
CORD
POWER
SUPPLY
TO OUTDOOR
UNIT
CONNECTING
RED
3
N
GRN/YLW
TB
BRN
2
YLW
BRN
4
3
CN201
1
2
F12
WHT
BLU
BLU
BLU
SYMBOL
TB
DSAR
HIC1
SYMBOL
NR11
RT11
RT12
IC141
52C
SYMBOL
C11
F12
F11
MF
MV
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93¡C)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
TERMINAL BLOCK
SURGE ABSORBER
DC / DC CONVERTER
6
5
4
3
2
1
78 RED
X1
BLU
F1
TB2
RED
BLU
BLU
GRY
WHT
TO INDOOR
UNIT
CONNECTING
REDRED a
b
TB
2WHT 52C1
2
R
C
S
BLK RED
C1
MC
YLW YLW
BLK
WHT
RED
ORN WHT
BLK
ORN
RED
C2
MF
RED CR
52C
N
RED
GRN/YLW
3
6
26F1
X1
BLU 5
1
3
220-240V
220-240V
SYMBOL
C1
C2
X1
SYMBOL
MF
MC
52C
SYMBOL
TB
CR
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
FAN MOTOR RELAY
OUTDOOR FAN MOTOR
COMPRESSOR (INNERTHERMOSTAT)
COMPRESSOR CONTACTOR
TERMINAL BLOCK
SURGE ABSORBER
FUSE(2A)
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
❈
❈
❈
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
❈
❈
❈
❈
❈
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16
MS-07NV - MS-09NV - MS-12NV - E2E2E2
MU-07NV - MU-09NV - E2E2
MODELS WIRING DIAGRAM
MODELS WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
SYMBOL
C11
F12
F11
MF
SYMBOL
NR11
RT11
RT12
HIC1
SYMBOL
TB
MV
SR11
52C
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93:)
FUSE(3.15A)
INDOOR FAN MOTOR
VARISTOR
ROOMTEMPERATURE THERMISTOR
INDOOR COILTHERMISTOR
DC/DC CONVERTER
TERMINAL BLOCK
VANE MOTOR
SOLID STATE RELAY
CONTACTOR
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
SYMBOL
C1
C2
SYMBOL
MF
MC
SYMBOL
TB
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR OUTDOOR FAN MOTOR
COMPRESSOR (INNERTHERMOSTAT)
TERMINAL BLOCK
FUSE (2A)
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
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
CIRCUIT BREAKER
GUARD
PLATE
POWER
SUPPLY
CORD
~/N 220-240V
50Hz
NR11
TRANS
HIC1
220-240V~
TO OUTDOOR
UNIT
CONNECTING F12
MV
POWER MONITOR,
RECEIVER
P.C.BOARD
REMOTE
CONTROLLER
TB
MF
RT11
RT12
SR11
52C
F11 C11
ELECTRONIC CONTROL P.C BOARD
1
2
1
5
4
3
2
6
1
3
2
1
L
N
2
1
LD101
122
CN
3
55
151
CN
CN201 3
4
CN211
111
CN
CN
112
121
CN
RED
WHT
BRN
YLW
GRY
BLK
BLU
BRN
BRN
BLU
BLU
WHT
BLU
BLU
GRN/YLW
GRN/YLW
❈
❈
❈❈
❈
BLU
F
BLK
MF
RED
BLK
WHT
3
2
1
MC
C1
SR
C
WHT
BLU RED
GRN/YLW
WHT
RED
C2
TB
N
TO
INDOOR UNIT
CONNECTING
BLU
WHT
❈❈❈
220-240V~ 2
❈
OB206t-1.qxp 25/9/97 6:44 PM Page 16

17
MS-18NV - E2
MU-18NV - E2
MODEL WIRING DIAGRAM
MODEL WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
~
SYMBOL
TB
DSAR
HIC1
SYMBOL
NR11
RT11
RT12
IC141
52C
SYMBOL
C11
F12
F11
MF
MV
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93¡C)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
VARISTOR
ROOMTEMPERATURE THERMISTOR
INDOOR COILTHERMISTOR
HYBRID IC
CONTACTOR
TERMINAL BLOCK
SURGE ABSORBER
DC / DC CONVERTER
❈
❈
SYMBOL
C1
C2
SYMBOL
MF
MC
SYMBOL
TB
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR OUTDOOR FAN MOTOR
COMPRESSOR (INNERTHERMOSTAT)
TERMINAL BLOCK
FUSE(2A)
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
❈
❈
❈
❈
❈
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
OB206t-1.qxp 25/9/97 6:44 PM Page 17

18
MS-24NV - E2
MU-24NV - E2
MODEL WIRING DIAGRAM
MODEL WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
SYMBOL
TB
DSAR
HIC1
SYMBOL
NR11
RT11
RT12
IC141
52C
SYMBOL
C11
F12
F11
MF
MV
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93¡C)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
HYBRID IC
CONTACTOR
TERMINAL BLOCK
SURGE ABSORBER
DC / DC CONVERTER
SYMBOL
C1
C2
X1
TB2
SYMBOL
MF
MC
52C
26F1
SYMBOL
TB
CR
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
FAN MOTOR RELAY
TERMINAL BLOCK
OUTDOOR FAN MOTOR
COMPRESSOR (INNER THERMOSTAT)
COMPRESSOR CONTACTOR
THERMAL READ SWITCH
TERMINAL BLOCK
SURGE ABSORBER
FUSE(2A)
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
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
220-240 ~
6
5
4
3
2
1
220-240 ~
78 RED
X1
BLU
F1
TB2
RED
BLU
BLU
GRY
WHT
TO INDOOR
UNIT CONNECTING
RED
RED A1/a
A2/b
TB
2WHT 52C1
2
R
C
S
BLK RED
C1
MC
YLW YLW
BLK
WHT
RED
ORN WHT
BLK
ORN
RED
C2
MF
RED CR
52C
N
RED
GRN/YLW
3
6
26F1
X1
BLU 5
1
3
❈
❈
❈
52C
CIRCUIT BREAKER
RT12
IC141 112
CN
HIC1
NR11
TRANS
1
220-240V~ `
WHT
220-240V~
WHT
DSAR
GRN/YLW
LD1
REMOTE
CONTROLLER
3
1
DISPLAY
P.C.BOARD
101
CN 102
CN 151
CN 111
CN
ELECTRONIC CONTROL P.C BOARD
4
2
1
C11
CN211
BLU
RECEIVER
P.C.BOARD
BLK
WHT
GRY
RED
RT11
MV
5
F11
3 3
BLU MF
3
121
CN
50Hz
~/N 220-240V
CORD
POWER
SUPPLY
TO OUTDOOR
UNIT
CONNECTING
RED
3
N
GRN/YLW
BRN
2YLW
BRN
4
3
CN201
1
2
F12
WHT
BLU
BLU
BLU
❈
❈
❈
❈
❈
TB
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19
MU-12NV - MU-18NV - E3E2
MODELS WIRING DIAGRAM
OUTDOOR UNIT
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
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
SYMBOL
C1
C2
SYMBOL
MF
MC
SYMBOL
TB
F
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR OUTDOOR FAN MOTOR
COMPRESSOR (INNER THERMOSTAT)
TERMINAL BLOCK
FUSE(2A)
MS-18NV - E3 MODEL WIRING DIAGRAM
INDOOR UNIT
SYMBOL
TB
DSAR
HIC1
SYMBOL
NR11
RT11
RT12
IC141
52C
SYMBOL
C11
F12
F11
MF
MV
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(93¡C)
FUSE(3.15A)
INDOOR FAN MOTOR
VANE MOTOR
VARISTOR
ROOMTEMPERATURE THERMISTOR
INDOOR COILTHERMISTOR
HYBRID IC
CONTACTOR
TERMINAL BLOCK
SURGE ABSORBER
DC / DC CONVERTER
NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
MF
BLK
WHT
RED
ORN
N
220-240V~
BLU 4
BLU
WHT
BLK
RED
C1
TB
WHT
ORN
F
C2 RED
WHT
1
2
3
GRN/YLW
TO
INDOOR UNIT
CONNECTING
C
SR
MC
2❈
❈
CIRCUITBREAKER
50Hz
220-240V~
BRN
DSAR
GRN/YLW
LD1
REMOTE
CONTROLLER
3
1
DISPLAY
P.C.BOARD
101
CN 102
CN 151
CN ELECTRONIC CONTROL P.C BOARD
BLU
RECEIVER
P.C.BOARD
MV
5
F11
3 3
BLU
~/N 220-240V
CORD
POWER
SUPPLY
TO OUTDOOR
UNIT
CONNECTING
BRN
L
N
GRN/YLW
TB
52C
BRN
24
3
CN201
1
2
F12
WHT
BLU
BLU
BLU
TRANS
HIC1
111
CN
4
2
1
C11
CN211
BLK
WHT
GRY
RED
RT11
MF
3
121
CN
CN
112
NR11
IC141 RT12
YLW
BRN
❈
❈
❈
❈
❈
❈
OB206t-1.qxp 25/9/97 6:44 PM Page 19

20
REFRIGERANT SYSTEM DIAGRAM
6
MS-07NV - MS-09NV -
MS-07NV - MS-09NV - E2E2
E1E1 MU-07NV - MU-09NV -
MU-07NV - MU-09NV - E2E2
E1E1
MS-12NV - MS-12NV - E2E1 MU-12NV - MU-12NV - E2E1
INDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
OUTDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Flared
connection
Refrigerant pipe [9.52
(Option)
(with heat insulator)
Accumulator
Outdoor
heat
exchanger
Capillary tube
[1.6x1200 Strainer
Refrigerant pipe
[6.35
(Option)
(with heat insulator)
Refrigerant flow in cooling
Unit:mm
Unit:mm
Refrigerant pipe [12.7
(Optional)
(with heat insulator)
Stop valve
(with service port)
Stop valve
(with service port)
Strainer
Refrigerant pipe
[6.35
(Option)
(with heat insulator)
Stop valve Capillary tube
[1.8x800
Refrigerant flow in cooling
Outdoor
heat
exchanger
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Indoor coil
thermistor
RT12
Flared
connection Compressor
Indoor
heat
exchanger
Compressor
OB206t-1.qxp 25/9/97 6:44 PM Page 20