Mitsubishi Electric MS-09SN-C1 User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················4
3. SPECIFICATION·················································6
4. OUTLINES AND DIMENSIONS ·························9
5. WIRING DIAGRAM ··········································12
6. REFRIGERANT SYSTEM DIAGRAM··············18
7. PERFORMANCE CURVES······························22
8. MICROPROCESSOR CONTROL ····················25
9. SERVICE FUNCTIONS ····································32
10. TROUBLESHOOTING······································34
11. DISASSEMBLY INSTRUCTIONS·····················42
12. PARTS LIST······················································50
13. OPTIONAL PARTS···········································58
Wireless type
Models
MS-09SN - (WH) · MU-09SN -
MS-09SN - (WH) · MU-09SN -
MS-10SN - (WH) · MU-10SN -
MS-10SN - (WH) · MU-10SN -
MS-12SN - (WH) · MU-12SN -
MS-12SN - (WH) · MU-12SN -
MS-15SN - (WH) · MU-15SN -
MS-15SN - (WH) · MU-15SN -
MS-17SN - (WH) · MU-17SN -
MS-18SN - (WH) · MU-18SN -
MS-24SN - (WH) · MU-24SN -
C1C1
C1C1
C1C1
C2C2
C1C1
C2C2
C1C1
C2C2
C1C1
C2C2
C1C1
SPLIT-TYPE, AIR CONDITIONERS
MS-09SN -
MS-09SN -
MS-10SN -
MS-10SN - C2
C1
C2
C1
No. OB256
REVISED EDITION-B
Revision:
●MS-09SN - , MS-10SN - , MS-12SN - , MS-15SN -
and MS-18SN - has been added.
●Please void OB256 REVISED EDITION-A.
C1
C2C2C2C2
OB256-1qxp 2.2.8 9:07 AM Page 1

2
TECHNICAL CHANGES
MS-09NW - ➔ MS-09SN -
1. Power supply voltage has changed. (110V ➔220V)
2. Indoor unit model has changed.
3. Remote controller has changed.
• SLEEP MODE function has been removed.
• ECONO COOL operation has been added.
• SWING button was removed, but SWING MODE function is available by VANE CONTROL button.
MS-10SN -
New model
MS-12NN - ➔ MS-12SN -
1. Design of receiver part on indoor unit has changed.
2. Remote controller has changed.
• SLEEP MODE function has been changed.
• ECONO COOL operation has been added.
• SWING button was removed, but SWING MODE function is available by VANE CONTROL button.
MS-15NN - ➔ MS-15SN -
MS-17NN - ➔ MS-17SN -
1. Design of receiver part on indoor unit has changed.
2. Remote controller has changed.
• SLEEP MODE function has been removed.
• ECONO COOL operation has been added.
• SWING button was removed, but SWING MODE function is available by VANE CONTROL button.
MS-24NN - ➔ MS-24SN -
1. Design of receiver part on indoor unit has changed.
2. Remote controller has changed.
• SLEEP MODE function has removed.
• ECONO COOL operation has added.
• SWING button was removed, but SWING MODE function is available by VANE CONTROL button.
MS-09SN - ➔ MS-09SN -
MS-10SN - ➔ MS-10SN -
MS-12SN - ➔ MS-12SN -
MS-15SN - ➔ MS-15SN -
1. Fan guard has added.
2. Indoor electronic control P.C. board has changed.
Indoor fan speed has changed.
MS-18SN -
New model C1
C2C1
C2C1
C2C1
C2C1
C1C1
C1C1
C1C1
C1C1
C1
C1C1
1
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3
MU-09NW - ➔ MU-09SN -
1. Outdoor unit model has changed.
2. Additional refrigerant amount of extended pipe length over 7m has changed. (10g/m ➔15g/m)
MU-10SN -
New model
MU-12NN - ➔ MU-12SN -
1. Outdoor unit model has changed.
2. Additional refrigerant amount of extended pipe length over 7m has changed. (10g/m ➔15g/m)
3. Diameter of expansion pipe (GAS) has changed. ([15.88 ➔[12.7)
MU-15NN - ➔ MU-15SN -
MU-17NN - ➔ MU-17SN -
1. Additional refrigerant amount of extended pipe length over 7m has changed. (10g/m ➔15g/m)
2. Service port has removed from outdoor unit.
3. Fusible plug has removed from outdoor unit.
MU-24NN - ➔ MU-24SN -
1. Additional refrigerant amount of extended pipe length over 7m has changed. (10g/m ➔15g/m)
MU-09SN - ➔ MU-09SN -
MU-10SN - ➔ MU-10SN -
MU-12SN - ➔ MU-12SN -
MU-15SN - ➔ MU-15SN -
1. Sub number has changed.
MU-18SN -
New model C1
C2C1
C2C1
C2C1
C2C1
C1C1
C1C1
C1C1
C1C1
C1
C1C1
OB256-1qxp 2.2.8 9:07 AM Page 3

4
PART NAMES AND FUNCTIONS
2
INDOOR UNIT
MS-09SN -
MS-09SN -
MS-10SN -
MS-10SN - C2
C1
C2
C1
Emergency operation switch
Operation section
Horizontal vane
Air filter
Deodorizing filter(option)
(gray sponge type)
Vertical vane
Air inlet
Grille
Remote control
receiving section
Remote controller
Display section
(when the grille is open)
Operation indicator lamp
Receiving section
Air cleaning filter(option)
(white bellows type)
Front panel
Emergency operation switch Operation indicator lamp
Receiving section
Air inlet
Piping
Drain hose
Air outlet
Drain outlet
(back and side)
OUTDOOR UNIT
MS-12SN -
MS-12SN -
MS-15SN -
MS-15SN -
MS-17SN -
MS-18SN -
MS-24SN - C1
C1
C1
C2
C1
C2
C1
MS-09SN -
MS-09SN -
MS-10SN -
MS-10SN - C2
C1
C2
C1
MS-09SN -
MS-09SN -
MS-10SN -
MS-10SN - C2
C1
C2
C1
MS-17SN -
MS-18SN -
MS-24SN - C1
C1
C1 MS-12SN -
MS-12SN -
MS-15SN -
MS-15SN - C2
C1
C2
C1
MU-09SN -
MU-09SN -
MU-10SN -
MU-10SN -
MU-12SN -
MU-12SN - C2
C1
C2
C1
C2
C1
MS-12SN -
MS-12SN -
MS-15SN -
MS-15SN - C2
C1
C2
C1 MS-17SN -
MS-18SN -
MS-24SN - C1
C1
C1
MU-15SN -
MU-15SN -
MU-17SN -
MU-18SN -
MU-24SN - C1
C1
C1
C2
C1
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5
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
ECONO COOL
STOP
START
HR.
MIN.
I FEEL COOL
DRY
PM
CLOCK
AM
RESET CLOCK
FAN
Open the front lid.
Signal transmitting section
Operation display section
OPERATE /STOP
(ON /OFF)button
TEMPERATURE buttons
OPERATION SELECT button
FAN SPEED CONTROL button OFF-TIMER button
HR. button
MIN. button
(TIME SET button)
ON-TIMER button
RESET button
ECONO COOL button
VANE CONTROL button
CLOCK SET button
REMOTE CONTROLLER
MS-09SN -
MS-09SN -
MS-10SN -
MS-10SN -
MS-12SN -
MS-12SN -
MS-15SN -
MS-15SN -
MS-17SN -
MS-18SN -
MS-24SN - C1
C1
C1
C2
C1
C2
C1
C2
C1
C2
C1
ACCESSORIES
<Indoor unit>
Installation plate
Installation plate fixing screw 4 x 25 mm
Remote controller mounting hardware
Fixing screw for 33.5 x 16 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
1
5
1
2
2
1
1
1
2
3
4
5
6
7
MS-09SN-
MS-09SN-
MS-12SN-
MS-12SN-
MS-15SN-
MS-15SN- 1
6
1
2
2
1
1
MS-17SN-
MS-18SN-
MS-24SN-
C2
C1
C2
C1
C2
C1 C1
C1
C1
OB256-1qxp 2.2.8 9:07 AM Page 5

6
SPECIFICATION
3
Indoor model
Function
Power supply
Capacity
Dehumidification
Air flow
(High/Med.w/Loww)
Power outlet
Running current
Total input
Auxiliary heater
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level
(High/Med.w/Loww)
Fan speed (High/Med.w/Loww)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
Outdoor model
Air flow
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity(R22)
Refrigerating oil (Model)
Capillary tube
(Inner diameter Olength)
(kcal/h)/(kW)
R/h
K/h
A
A
W
A(kW)
%
A
A
(kcal/h/W)/(W/W)
"
mm
kg
dB
rpm
k"
k"
K/h
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
mm
MS-10SN - C1
2,450/2.85
4.50
1,005
99
2.44/2.84
910/800w/680w
MU-10SN - C1
3.97
1.2
564/474w/384w
26
10
37/33w/29w
1,950
0.36
RH-145NGDT
700
C-R 2.74
C-S 3.78
RA6N33-AA
WHT-BLK 150
BLK-RED 265
49
740
0.82
[1.6 O900
MS-10SN - C2
2,500/2.91
4.61
992
98
2.52/2.93
940/830w/710w
MU-10SN - C2
4.08
Electrical data
Fan motor
Special remarks
Compressor
Electrical data
Fan motor
Special remarks
Capacity
Energy efficiency ratio (EER)
Capacity
Connection method
Connection method
MS-09SN - C1
880
97
2.44/2.84
890/740w/600w
MU-09SN - C1
2,150/2.50
1.1
474/384w/300w
4.13
21
9
35/30w/26w
1,638
3.68
0.28
RH-130NGDT
650
C-R 3.19
C-S 3.55
RA6N23-AA
WHT-BLK 169
BLK-RED 226
45
630
0.80
[1.4 O600
MS-09SN - C2
843
93
2.55/2.97
920/770w/630w
MU-09SN - C2
Cooling
Single phase
220V, 60Hz
10
—
0.17
RC4N19-AA
WHT-BLK 335
BLK-RED 320
850O278O191
5
3
10
10
Flared
780o540o255
32
1
300(MS56)
Flared
NOTE:Test conditions are based on CNS3615.
Cooling : Indoor DB 27°C / WB 19.5°C
Outdoor DB 35°C /
Indoor-Outdoor piping length 5m
w Reference value
OB256-1qxp 2.2.8 9:07 AM Page 6

7
Indoor model
Function
Power supply
Capacity
Dehumidification
Air flow
(High/Med.w/Loww)
Power outlet
Running current
Total input
Auxiliary heater
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level
(High/Med.w/Loww)
Fan speed
(High/Med.
w
/Low
w
)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
Outdoor model
Air flow
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity(R22)
Refrigerating oil (Model)
Capillary tube
(Inner diameter Olength)
(kcal/h)/(kW)
R/h
K/h
A
A
W
A(kW)
%
A
A
(kcal/h/W)(W/W)
"
mm
kg
dB
rpm
k"
k"
K/h
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
mm
MS-15SN - C1
1,180/1,040w/900w
MU-15SN - C1
3,650/4.24
2.2
6.50
1,400
98
36
2.61/3.03
2,340
5.74
0.50
RH-207NHDT
1,000
C-R 1.68
C-S 2.78
RA6N50-BA
WHT-BLK 116
BLK-RED 111
850o605o290
42
52
865
1.30
520(MS56)
[1.8 O550
Electrical data
Fan motor
Special remarks
Compressor
Electrical data
Fan motor
Special remarks
Capacity
Energy efficiency ratio (EER)
Capacity
Connection method
Connection method
MS-15SN - C2
1,210/1,070w/930w
MU-15SN - C2
Cooling
Single phase
220V, 60Hz
780/672w/570w
15
—
0.26
RA4N30-AB
WHT-BLK 118
BLK-RED 162
1,015O320O190
14
5
42/38w/34
w
3
10
10
Flared
1
Flared
MS-12SN - C1
1,180/1,040w/900w
MU-12SN - C1
3,150/3.66
1.5
5.14
1,120
99
30
2.81/3.27
1,656
4.52
0.36
RH-167NHDT
800
C-R 2.16
C-S 3.11
RA6N33-AA
WHT-BLK 150
BLK-RED 265
780o540o255
36
49
700
1.20
520(MS56)
[1.8O500
MS-12SN - C2
1,210/1,070w/930w
MU-12SN - C2
NOTE:Test conditions are based on CNS3615. (MS-12/15SN- )
Cooling : Indoor DB 27°C / WB 19.5°C
Outdoor DB 35°C /
Test conditions are based on CNS 14464. (MS-12/15SN- )
Cooling : Indoor DB 27°C / WB 19°C
Outdoor DB 35°C /
Indoor-Outdoor piping length 5m
w Reference value
C2
C1
OB256-1qxp 2.2.8 9:07 AM Page 7

8
Indoor model
Function
Power supply
Capacity
Dehumidification
Air flow
(High/Med.w/Loww)
Power outlet
Running current
Total input
Auxiliary heater
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level
(High/Med.w/Loww)
Fan speed
(High/Med.
w
/Low
w
)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
Outdoor model
Air flow
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level
Fan speed (High)
Fan speed regulator
Refrigerant filling
capacity(R22)
Refrigerating oil (Model)
Capillary tube
(Inner diameter Olength)
(kcal/h)/(kW)
R/h
K/h
A
A
W
A(kW)
%
A
A
(kcal/h/W)/(W/W)
"
mm
kg
dB
rpm
k"
k"
K/h
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
mm
Electrical data
Fan motor
Special remarks
Compressor
Electrical data
Fan motor
Special remarks
Capacity
Energy efficiency ratio (EER)
Capacity
Connection method
Connection method
Cooling
Single phase
220V, 60Hz
—
0.29
RA4N30-AB
WHT-BLK 118
BLK-RED 162
1,015O320O190
14
5
3
10
10
Flared
850O605O290
Flared
MS-17SN - C1
3,950/4.59
2.3
7.30
1,580
98
39
2.50/2.91
1,260/1,140w/1,020w
MU-17SN - C1
6.51
RH-231NHDT
1,100
C-R 1.65
C-S 2.67
1.35
[2.0 O700
2,280
0.50
RA6N50-BA
WHT-BLK 116
BLK-RED 111
44
52
865
1
520(MS56)
15
MS-18SN - C1
4,500/5.23
2.6
840/750w/660w
8.77
1,910
99
49
2.36/2.74
45/41w/38w
1,290/1,170w/1,050w
MU-18SN - C1
7.98
RH-277NHDT
1,300
C-R 1.38
C-S 2.55
1.40
[2.0 O500
MS-24SN - C1
5,600/6.51
3.4
20
14.00
3,040
99
56
1.84/2.14
1,260/1,140w/1,020w
MU-24SN - C1
2,460
13.08
0.63
NH-38NBDT
1,700
C-R 0.83
C-S 1.83
RA6V60-AC
WHT-BLK 81.1, BLK-RED 102
BLK-YLW 92.2
61
54
930
2
2.15
1,200(MS32)
[2.0O700(600+100)
NOTE:Test conditions are based on CNS3615. (MS-17/24SN- )
Cooling : Indoor DB 27°C / WB 19.5°C
Outdoor DB 35°C /
Test conditions are based on CNS14464. (MS-18SN- )
Cooling : Indoor DB 27°C / WB 19°C
Outdoor DB 35°C /
Indoor-Outdoor piping length 5m
w Reference value
C1
C1
OB256-1qxp 2.2.8 9:07 AM Page 8

9
OUTLINES AND DIMENSIONS
4
INDOOR UNIT
116.581.5
58 19
162
326
42
169
2.5
326
271 4.5
231.5
41
82
78
67
818
278
850
16562956
7 or more
100
5
189
Wireless remote controller
Wall hole [65
Indoor unit
Installation plate
Air in
{
Air out Insulation [28
Drain hose [16
(Connected part O.D)
Installation plate
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[21 I.D
Unit: mm
MS-09SN -
MS-09SN - C2
C1
INDOOR UNIT
116.581.5
818
278
850
16562956
or more
100
41
2.5
42
271 4.5
231.5
82 169
326 326
5
189
Air in
Air out Insulation [28
Drain hose [16
(Connected part O.D)
Installation plate
Wall hole [65
Indoor unit
Installation plate
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[21 I.D
78
67
7
{
162
19
58
Wireless remote controller
MS-10SN -
MS-10SN - C2
C1
OB256-1qxp 2.2.8 9:07 AM Page 9

10
320
25
43-
35-
155
90
104
74
260
10
780
500
122
40
540
320 285 255
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [9.52 (MU-09/10SN)
[12.7 (MU-12SN)
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35
Airout
Air in
Air in
Service port
109 32
110
147
Drainage
3holes [33
If clearance
behind the outdoor unit
is only 400
mm
or 500
mm
side Amust be fully opened.
100mm or more
100mm or more
100mm or more
350mm or more
REQUIRED SPACE
A
400mm or more
OUTDOOR UNIT
MU-09SN -
MU-09SN -
MU-10SN -
MU-10SN -
MU-12SN -
MU-12SN - C2
C1
C2
C1
C2
C1
Unit: mm
OB256-1qxp 2.2.8 9:07 AM Page 10

11
58 19
162
3 297
450
450
352438
254
20
60
40
150 648 217
5190
995
19077550
320
1015
Wireless remote controller
4holes 11x 20 Indoor unit
Installation plate
Power supply cord
Lead to right 2m
Lead to left 1m
Wall hole [75
Installation plate
Liquid line [8-0.5m
Gas line [12-0.43m
Insulation [50 O.D
[28 I.D
Insulation [28
Drain hose [16
Air out
{
Air in
If clearance
behind the
outdoor unit is
only 400
mm
or
500
mm,
side A
must be fully
opened.
100mm or more
REQUIRED SPACE
350mm or more
500mm or more
100mm or more
100mm or more
A
350 20
35
248
Air in
Air out
290 310
345
30 Service panel
Service port
605
292
20
50 183
500
850 74
157
100
Drainage
3holes [16.2
161
Gas refrigerant
pipe joint
Refrigerant pipe (flared)
[15.88
Liquid refrigerant
pipe joint
Refrigerant pipe (flared)
[6.35 (MU-15/17/18SN)
[9.52 (MU-24SN)
30
o
35
o
INDOOR UNIT
OUTDOOR UNIT
MS-12SN -
MS-12SN -
MS-15SN -
MS-15SN - C2
C1
C2
C1 MS-17SN -
MS-18SN -
MS-24SN - C1
C1
C1
MU-15SN -
MU-15SN -
MU-17SN - C1
C2
C1 MU-18SN -
MU-24SN - C1
C1
OB256-1qxp 2.2.8 9:07 AM Page 11

12
5WIRING DIAGRAM
MS-09SN -
MS-10SN - C1
C1
MODELS WIRING DIAGRAM
SYMBOL
RT12
SR141
TB
52C
SYMBOL
MF
MV
NR11
RT11
SYMBOL
C11
F11
F12
HIC1
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(3.15A)
THERMAL FUSE(93:)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
CONTACTOR
3
2
2
3
RT12
RT11
BLK
GRY
YLW
BRN
WHT
RED
1
2
3
4
5
6
MF
F11
52C
HIC1
TRANS
NR11
C11
SR141
CN211
112
CN
CN
111
121
CN
1
3
ELECTRONIC CONTROL P.C. BOARD
TB
REMOTE
CONTROLLER
POWER MONITOR,
RECEIVER
P.C. BOARD
MV
F12
POWER
SUPPLY
CORD
1[220V~
60Hz
L1
L
2
11
2
4
3
CN201
CN
151
55
LD101T
GRN/YLW
BLU
WHT BLU
BLU
BRN
BLU
BLU BLU
C
220V~
TO OUTDOOR
UNIT
CONNECTING BRN
GRN/YLW
INDOOR UNIT
NOTE:1. About the outdoor side 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
MODELS WIRING DIAGRAM
OUTDOOR UNIT
MU-09SN -
MU-10SN -
MU-12SN - C1
C1
C1
NOTE: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.
/: Terminal block
FROM INDOOR
UNIT
CONNECTING
220V~ BLU
WHT
C
2
C2
TB
MF
RED
BLK
WHT
MC
C1
SR
C
WHT
BLK
RED
SYMBOL
TB
SYMBOL
MC
MF
SYMBOL
C1
C2
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
TERMINAL BLOCK
SG79B730H02
VG79B076H01
OB256-1qxp 2.2.8 9:07 AM Page 12

13
MS-09SN -
MS-10SN - C2
C2
MODELS WIRING DIAGRAM
SYMBOL
RT12
SR141
TB
52C
SYMBOL
MF
MV
NR11
RT11
SYMBOL
C11
F11
F12
HIC1
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(3.15A)
THERMAL FUSE(93:)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
CONTACTOR
3
2
2
3
RT12
RT11
BLK
GRY
YLW
BRN
WHT
RED
1
2
3
4
5
6
MF
F11
52C
HIC1
TRANS
NR11
C11
SR141
CN211
112
CN
CN
111
121
CN
1
3
ELECTRONIC CONTROL P.C. BOARD
TB
REMOTE
CONTROLLER
POWER MONITOR,
RECEIVER
P.C. BOARD
MV
F12
POWER
SUPPLY
CORD
1[220V~
60Hz
L1
L
2
11
2
4
3
CN201
CN
151
55
LD101T
GRN/YLW
BLU
WHT BLU
BLU
BRN
BLU
BLU BLU
C
220V~
TO OUTDOOR
UNIT
CONNECTING BRN
GRN/YLW
INDOOR UNIT
NOTE:1. About the outdoor side 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
MODELS WIRING DIAGRAM
OUTDOOR UNIT
MU-09SN -
MU-10SN -
MU-12SN - C2
C2
C2
NOTE: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.
/: Terminal block
FROM INDOOR
UNIT
CONNECTING
220V~ BLU
WHT
C
2
C2
TB
MF
RED
BLK
WHT
MC
C1
SR
C
WHT
BLK
RED
SYMBOL
TB
SYMBOL
MC
MF
SYMBOL
C1
C2
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
TERMINAL BLOCK
SG79J520H01
VG79B176H01
OB256-1qxp 2.2.8 9:07 AM Page 13

14
MS-12SN -
MS-15SN - C1
C1
MODELS WIRING DIAGRAM
SYMBOL
RT12
TB
52C
SYMBOL
IC141
MF
MV
NR11
RT11
SYMBOL
C11
DSAR
F11
F12
HIC1
NAME NAME NAME
INDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
THERMAL FUSE(93:)
DC/DC CONVERTER
HYBRID IC
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
TERMINAL BLOCK
CONTACTOR
220V~
BLU
BRN
2
60Hz
TRANS
HIC1
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
BLU
RECEIVER
P.C.BOARD
BLK
WHT
GRY
RED
RT11
MV5
F11
33
BLU MF
3
121
CN
CN
112
1[220V~
CORD
POWER
SUPPLY
TO OUTDOOR
UNIT
CONNECTING BRN
L
L1
GRN/YLW
TB
NR11
IC141
52C
C
RT12
YLW
BRN
4
3
CN201
1
2
F12
WHT
BLU
BLU
BLU
INDOOR UNIT
NOTE:1. About the outdoor side 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
MODELS WIRING DIAGRAM
OUTDOOR UNIT
MU-15SN -
MU-17SN - C1
C1
NOTE: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.
/: Terminal block, : Connector
220V~
MF
BLK
WHT
RED
ORN
C
2
BLU 4
BLU
WHT
BLK
RED
C1
TB
ORN
C2RED
WHT
1
2
3
FROM
INDOOR UNIT
CONNECTING
C
SR
MC
SYMBOL
TB
SYMBOL
MC
MF
SYMBOL
C1
C2
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
TERMINAL BLOCK
MS-17SN - C1
OB256-1qxp 2.2.8 9:07 AM Page 14

15
MS-12SN -
MS-15SN - C2
C2
MODELS WIRING DIAGRAM
SYMBOL
RT12
TB
52C
SYMBOL
IC141
MF
MV
NR11
RT11
SYMBOL
C11
DSAR
F11
F12
HIC1
NAME NAME NAME
INDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
THERMAL FUSE(93:)
DC/DC CONVERTER
HYBRID IC
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
TERMINAL BLOCK
CONTACTOR
220V~
BLU
BRN
2
60Hz
TRANS
HIC1
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
BLU
RECEIVER
P.C.BOARD
BLK
WHT
GRY
RED
RT11
MV5
F11
33
BLU MF
3
121
CN
CN
112
1[220V~
CORD
POWER
SUPPLY
TO OUTDOOR
UNIT
CONNECTING BRN
L
L1
GRN/YLW
TB
NR11
IC141
52C
C
RT12
YLW
BRN
4
3
CN201
1
2
F12
WHT
BLU
BLU
BLU
INDOOR UNIT
NOTE:1. About the outdoor side 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
MODELS WIRING DIAGRAM
OUTDOOR UNIT
MU-15SN - C2
NOTE: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.
/: Terminal block, : Connector
220V~
MF
BLK
WHT
RED
ORN
C
2
BLU 4
BLU
WHT
BLK
RED
C1
TB
ORN
C2RED
WHT
1
2
3
FROM
INDOOR UNIT
CONNECTING
C
SR
MC
SYMBOL
TB
SYMBOL
MC
MF
SYMBOL
C1
C2
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
TERMINAL BLOCK
MS-18SN - C1
VG79B123H01
VG79B175H01
OB256-1qxp 2.2.8 9:07 AM Page 15

16
MODELS WIRING DIAGRAM
OUTDOOR UNIT
MU-18SN - C1
NOTE: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.
/: Terminal block, : Connector
220V~
MF
BLK
WHT
RED
ORN
C
2
BLU 4
BLU
WHT
BLK
RED
C1
TB
ORN
C2RED
WHT
1
2
3
FROM
INDOOR UNIT
CONNECTING
C
SR
MC
SYMBOL
TB
SYMBOL
MC
MF
SYMBOL
C1
C2
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
TERMINAL BLOCK
VG79B106H01
OB256-1qxp 2.2.8 9:07 AM Page 16

17
MS-24SN - C1
MODEL WIRING DIAGRAM
SYMBOL
RT12
TB
52C
SYMBOL
IC141
MF
MV
NR11
RT11
SYMBOL
C11
DSAR
F11
F12
HIC1
NAME NAME NAME
INDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
THERMAL FUSE(93:)
DC/DC CONVERTER
HYBRID IC
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
TERMINAL BLOCK
CONTACTOR
220V~
220V~
2
C
CN
151
CN
102 CN 101
35
MV
DISPLAY
P.C.BOARD RECEIVER
P.C.BOARD
3
REMOTE
CONTROLLER
52C
RT12
IC141 112
CN
HIC1
NR11
TRANS
1WHTWHT
DSAR
GRN/YLW
LD1
3
1
111
CN
ELECTRONIC CONTROLP.C. BOARD
4
2
1
C11
CN211
WHT
BLK
WHT
GRY
RED
RT11
F11
BLU
MF
3
121
CN
60Hz
1[220V~
CORD
POWER
SUPPLY
TO OUTDOOR
UNIT
CONNECTING RED
3
GRN/YLW
TB
BLU YLW
BRN
4
3
CN201
1
2
F12
BLU
BRN
BLU
BLU
INDOOR UNIT
NOTE:1. About the outdoor side 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
MODEL WIRING DIAGRAM
OUTDOOR UNIT
MU-24SN - C1
NOTE: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.
/: Terminal block, : Connector
6
5
4
3
2
1
RED
RED
2
FROM INDOOR UNIT CCONNECTING
220V~ 220V~
GRY
REDCR
6
26F1
X1
BLU
BLU
BLU
BLU
YLW
WHT
52C
52C
5
1
43
65
X1 78
A2/b
A1/a52C
RED
3
C
WHT
YLW
52C
1
2
TB C
RS
BLK RED
C1
MC
3YLW YLW
BLK
WHT
RED
ORN WHT
BLK
ORN
RED
C2
MF
SYMBOL
X1
26F1
52C
SYMBOL
MC
MF
TB
SYMBOL
CR
C1
C2
NAME NAME NAME
CR SURGE ABSORBER
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
TERMINAL BLOCK
FAN MOTOR RELAY
THERMOSTAT(AIRFLOW CONTROL)
CONTACTOR
OB256-1qxp 2.2.8 9:07 AM Page 17

18
REFRIGERANT SYSTEM DIAGRAM
6
MS-09SN -
MS-09SN - C2
C1 MU-09SN -
MU-09SN - C2
C1
INDOOR UNIT OUTDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe [9.52
(Option)
(with heat insulator)
Outdoor
heat
exchanger
Capillary tube
[3.0x[1.4x600
Strainer
Refrigerant pipe [6.35
(Option)
(with heat insulator)
Refrigerant flow in cooling
Unit:mm
Stop valve
(with service port)
Indoor coil
thermistor
RT12
Compressor
Flared connection
Flared connection
Stop valve
MS-10SN -
MS-10SN - C2
C1 MU-10SN -
MU-10SN - C2
C1
INDOOR UNIT OUTDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe [9.52
(Option)
(with heat insulator)
Outdoor
heat
exchanger
Capillary tube
[3.0x[1.6x900
Strainer
Refrigerant pipe [6.35
(Option)
(with heat insulator)
Refrigerant flow in cooling
Unit:mm
Stop valve
(with service port)
Indoor coil
thermistor
RT12
Compressor
Flared connection
Flared connection
Stop valve
OB256-1qxp 2.2.8 9:07 AM Page 18

19
MS-15SN -
MS-15SN -
MS-17SN -
MS-18SN - C1
C1
C2
C1 MU-15SN -
MU-15SN -
MU-17SN -
MU-18SN - C1
C1
C2
C1
INDOOR UNIT OUTDOOR UNIT
Unit:mm
Room
temperature
thermistor RT11
Flared
connector
Flared
connector
Refrigerant pipe {6.35
(Option)
(with heat insulator)
Refrigerant pipe {15.88
(Option)
(with heat insulator)
Refrigerant flow
Compressor
Accumulator
Stop valve
(with service port)
Stop valve
Strainer
Outdoor heat
exchanger
Distributor
MU-17SN- { 3.0✕ { 2.0✕700
MU-18SN-
{ 3.0✕ { 2.0✕500
C1
C1
MU-15SN- { 3.0✕ { 1.8✕550
MU-15SN-
{ 3.0✕ {1.8 ✕550
C1
C2
Capillary tube
Indoor heat
exchanger
Indoor coil
thermistor
RT12
MS-12SN -
MS-12SN - C2
C1 MU-12SN -
MU-12SN - C2
C1
INDOOR UNIT OUTDOOR UNIT
Unit:mm
Room
temperature
thermistor RT11
Flared
connector
Flared
connector
Refrigerant pipe {6.35
(Option)
(with heat insulator)
Refrigerant pipe {12.7
(Option)
(with heat insulator)
Refrigerant flow
Compressor
Stop valve
(with service port)
Stop valve
Strainer
Outdoor heat
exchanger
Distributor
{ 3.0✕ { 1.8✕500
Capillary tube
Indoor heat
exchanger
Indoor coil
thermistor
RT12
OB256-1qxp 2.2.8 9:07 AM Page 19

20
INDOOR UNIT OUTDOOR UNIT
RT11
Room
temperature
thermistor
Flared
connector
Flared
connector
Refrigerant pipe [9.52
(Option)
(with heat insulator)
Refrigerant pipe [15.88
(Option)
(with heat insulator)
Stop Valve
Discharge pressure
regulator open
2.55MPa(26.0kgf/F)
Strainer
Flow of refrigerant
Stop valve
(With service port)
Indoor coil
thermistor
RT12
[3.0 600
[2.0
[3.0 350[1.6
[3.0 100[2.0
Compressor
Accumulator
Outdoor heat
exchanger
Indoor heat
exchanger
MS-24SN - C1 MU-24SN - C1
Unit:mm
OB256-1qxp 2.2.8 9:07 AM Page 20