Mitsubishi MUX-10NV-E1, MUX-18NV-E1, MUX-24NV-E1 Service Manual

SPLIT-TYPE AIR CONDITIONERS

SERVICE MANUAL

Wireless type
Models

MSX-05NV -

(WH)●

No. OB183

SECOND EDITION

MUX-10NV -

E1E1

MSX-09NV ­MSX-12NV -

(WH)●

(WH)●

CONTENTS

1. TECHNICAL CHANGES ····································2

2. PART NAMES AND FUNCTIONS······················3

3. SPECIFICATION·················································6

4. OUTLINES AND DIMENSIONS·························9

5. WIRING DIAGRAM···········································11

6. REFRIGERANT SYSTEM DIAGRAM··············14

7. PERFORMANCE CURVES······························21

8. MICROPROCESSOR CONTROL ····················23

9. SERVICE FUNCTIONS ····································30

10. TROUBLESHOOTING ······································31

11. DISASSEMBLY INSTRUCTIONS·····················37

12. PARTS LIST······················································46

13. OPTIONAL PARTS ····································BACK

MUX-18NV ­MUX-24NV -

E1E1

E1E1

1

TECHNICAL CHANGES

MSX-10LV- ➔ MSX-10NV­MSX-18LV- ➔ MSX-18NV­MSX-24NV- New model

E1

E1E2

E1E2

Connectable unit table

INDOOR UNIT OUTDOOR UNIT
MSX-05NV x 2 MUX-10NV­MSX-09NV x 2 or x 3 MUX-18NV­MSX-09NV x 1 or x 2
MSX-12NV x 1 or x 2

MUX-24NV-

E1
E1

E1

It is not connected except above connection of indoor unit and outdoor unit.

1. Indoor unit model has changed.

2. Indoor fan motor has changed. (RC2V17-AA RC4V19-AA)

3. Compressor has changed. (KH-134VLC KH-134VLL)

4. Remote controller model has changed.

5. Microprocessor controller has changed.

6. The receiving system has changed.

INDOOR

220/240V

OUTDOOR INDOOR

220/240V.50Hz

220/240V

MSX-18NV

220/240V.50Hz

12VDC

12VDC

OUTDOOR

MSX-18NV

220/240V

220/240V.50Hz

50Hz

220/240V

7. Terminal block has changed.

LN2LN2 2121LN 2 1

8. Wiring diagram has changed.

9. Compressor protector has changed. (MSX-18NV- )
THERMAL SWITCH
OVERCURRENT RELAY OVERCURRENT RELAY (INNER THERMOSTAT)

E1

12VDC

220/240V
50Hz

MSX-18NV-

E1

2

2

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSX-05NV- , MSX-09NV- , MSX-12NV-

(When the front panel is open)

E1E1E1

OUTDOOR UNIT

MUX-10NV- , MUX-18NV-

E1E1

MUX-24NV-

E1

Air inlet

(back and side)

Piping

Drainage hose

Air outlet

Drain outlet

3

.

MSX-05NV­MSX-09NV-

E1
E1

REMOTE CONTROLLER

4

MSX-05NV- (Product number 7000501T~)
MSX-09NV- (Product number 7000701T~)
MSX-12NV-

E1

E1

E1

5

Model

Function

Power supply

Unit No.

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 (at 20:)
Model
Winding resistance (at 20:)
Model
Winding resistance (at 20:)

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

kW

R/h
K/h
K/h

A
A

A
W
W

A(kW)

%
%

A

A

A

A

W

"

"

"

mm
mm
mm
mm
mm
mm

kg
kg

dB

dB
rpm
rpm

kg
k"
k"

KH - 134VLL

650

C -R 4.66 C -S 8.20

RC4V 19 - A A

WHT - BLK 292 BLK - RED 324

RA6V22 - BC

WHT - BLK 325.0 BLK - RED 393.3

815
275
183
760
540
230

8

31

5

37

46 - 47

1,100

700

4
1

1.15
10
10

Capacity

Electrical
data

Coefficient of performance(C.O.P)

Compressor

Indoor
fan motor
Outdoor
fan motor

Dimensions

Weight

Special
remarks

Indoor
Outdoor

Indoor
Outdoor
Indoor
Outdoor

Indoor
Outdoor

Indoor unit
Outdoor unit

Width
Height
Depth
Width
Height
Depth

Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit

RT11(at 25:)
RT12(at 25:)

MSX-10NV-

E1

OUTDOOR

Cooling

Single phase, 220-240V, 50Hz

MUX-10NV-

E1

INDOOR MSX-05NV-

E1

Single
A or B

2.2

0.8

492

1,560

0.17

3.33-3.43
35

705-755

–

94–86

96-92

3.05-3.15

0.17

2.97-2.78

Double

A + B

1.3x2

0.2x2

492x2

1,560

0.17x2

3.36-3.46
35x2

720-760

–

94–86

97-92

3.25-3.35

0.17x2

3.29-3.13

10

17

0.27

3

SPECIFICATION

NOTE:Test conditions

Cooling : Indoor DB27°C / WB19°C

6

Outdoor DB35°C / WB24°C

Model

Function

Power supply

Unit No.

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 (at 20:)
Model
Winding resistance (at 20:)
Model
Winding resistance (at 20:)

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

kW

R/h
K/h
K/h

A
A

A
W
W

A(kW)

%
%

A

A

A

A

W

"

"

"

mm
mm
mm
mm
mm
mm

kg
kg

dB

dB
rpm
rpm

kg
k"
k"

KH-134VLLx2

650x2

C-R 4.66, C-S 8.20

RC4V19-AA

WHT-BLK 292 BLK-RED 324

RA6V50-CB or RA6V50-CC

WHT-BLK117.3 BLK-YLW 65 YLW-RED 49.6

815
275
183
850
605
290

8

54

5
37
53

1,100

830-860

4

2

0.75+0.75
10
10

Capacity

Electrical
data

Coefficient of performance(C.O.P)

Compressor

Indoor
fan motor
Outdoor
fan motor

Dimensions

Weight

Special
remarks

Indoor
Outdoor

Indoor
Outdoor
Indoor
Outdoor

Indoor
Outdoor

Indoor unit
Outdoor unit

Width
Height
Depth
Width
Height
Depth

Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit

RT11(at 25:)
RT12(at 25:)

MSX-18NV-

E1

OUTDOOR UNIT

Cooling

Single phase, 220-240V, 50Hz

MUX-18NV-

E1

INDOOR UNIT MSX-09NV-

E1

Double

A + B or A + C

2.1x2

0.8x2

492x2

1,980

0.17x2

7.06-7.16
35x2

1500-1580

–

94-86
97-92

17x2

6.67-6.77

0.17x2

0.37

2.68-2.55

Single

A or B or C

2.3

0.9

492

1,320

0.17

3.63-3.73
35

755-795

–

94-86
95-89

17

3.3-3.4

0.17

0.32

2.91-2.77

Double

B + C

1.3x2

0.2x2

492x2

1,320

0.17x2

3.66-3.76
35x2

760-810

–

94-86
94-90

17

3.32-3.42

0.17x2

0.32

3.13-2.95

Triple

A + B + C

2.1+1.3x2

0.8+0.2x2
492x3

1,980

0.17x3

7.09-7.19
35x3

1495-1585

–

94-86
96-92

17x2

6.69-6.79

0.17x3

0.37

2.94-2.78

15

NOTE:Test conditions

Cooling : Indoor DB27°C / WB19°C

Outdoor DB35°C / WB24°C

7

Model

Function

Power supply

Unit No.

Capacity

Capacity

Dehumidification
Air flow

Indoor
Outdoor

Power outlet

Electrical
data

Running
current

Power input
Auxiliary heater
Power factor

Indoor
Outdoor
Indoor
Outdoor

Indoor

Outdoor
Starting current
Compressor motor current
Fan motor
current

Indoor unit

Outdoor unit

Coefficient of performance(C.O.P)

Model

Compressor

Output
Winding resistance (at 20:)

Indoor
fan motor
Outdoor
fan motor

Model
Winding resistance (at 20:)
Model
Winding resistance (at 20:)

Width
Indoor unit

Dimensions

Outdoor unit

Height

Depth

Width

Height

Depth

Weight

Indoor unit
Outdoor unit
Air direction

Special
remarks

Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit
Refrigerant filling capacity(R-22)

Thermistor

RT11(at 25:)

RT12(at 25:)

NOTE:Test conditions

Cooling : Indoor DB27°C / WB19°C

Outdoor DB35°C / WB24°C

MSX-24NV- E1INDOOR UNIT OUTDOOR UNIT

MSX-09NV­MSX-12NV-

E1
E1

Cooling

Single phase, 220-240V, 50Hz

Double
A+C or A+D
B+C or B+D

3.1+2.3

1.4+0.8

558+492

2400-2640

25

0.17x2

10.8-10.4
35x2

2.33-2.40

–

94–86

97-96

48

10.6-10.2

0.17x2

0.28-0.31

2.25-2.19

A+B+C or

1.95x2+2.2

0.5x2+0.8

558x2+492

kW

R/h
K/h
K/h

A
A
A
W

kW

A(kW)

%
%
A
A
A
A

Single
A or B

3.4

1.6

558

0.17

6.2-6.0
35

1.32-1.38

–

94–86

97-96

6.2-6.0

0.17

2.51-2.40

Single
C or D

2.6

1.2

492

0.17

4.4-4.3
35

0.94-0.98

–

94–86

97-96

4.4-4.2

0.17

2.67-2.56

Double

A+B

2.0x2

0.5x2

558x2

0.17x2

6.5-6.5
35x2

1.39-1.49

–

94–86

97-96

6.2-6.0

0.17x2

2.74-2.56

Double

C+D

1.7x2

0.3x2

492x2

0.17x2

4.6-4.4
35x2

0.98-1.02

–

94–86

97-96

4.4-4.2

0.17x2

3.24-3.12

RH-174VGH+RH-231VHA

W

"

RH-174VGH C-R3.30 C-S5.80 RH-231VHA C-R2.13 C-S3.91

RH-174VGH 800 RH-231VHA 1100

RC4V19-AA

"

WHT-BLK 292 BLK-RED 324

RA6V25-AA

"

mm
mm
mm
mm
mm
mm

kg
kg

WHT-BLK142 BLK-RED135

815
275
183
750
900
330

8

72

5
dB
dB

rpm
rpm

MSX-09NV 37 MSX-12NV 42

49

MSX-09NV 1100 MSX-12NV 1230

530-570

4

1

kg
k"
k"

1.15+1.15
10
10

Triple

A+B+D

0.17x3

11.1-10.6
35x3

2.37-2.45

–

94–86
97-96

10.6-10.2

0.17x3

2.46-2.39

MUX-24NV-

Triple

A+C+D or

B+C+D

2.9+1.55x2

1.3+0.3x2

558+492x2

0.17x3

11.1-10.6
35x3

2.37-2.45

–

94–86
97-96

10.6-10.2

0.17x3

2.42-2.35

E1

Four

A+B+C+D

1.95x2+1.55x2

0.5x2+0.3x2

558x2+492x2

0.17x4

11.5-10.9
35x4

2.45-2.50

–

94–86

97-96

10.6-10.2

0.17x4

2.70-2.65

8

230

260
295

Bolt pitch

4 holes 10 21

Bolt pitch for installation

500

250

10

262.5

540

760

112

Wiring hole

Rear side

20

63

384.5

67 57

57
57
57

68

68

Stop valve 1/4F

Stop valve 3/8F

151

Service panel

58

60

21

35

50

70

50

50

56

105

Air in

Air in

Air out

Drainage
4 hole

[16.2

108

ø415

35cm or more

50cm or more

10cm or more

10cm or more

Unless any obstacle
exists in front ,right

Unless any obstacle
exists in front
and left sides.

10cm or more

Unless any obstacle
exists in right , left and
rear sides.

REQUIRED SPACE

Unit A

4

OUTLINES AND DIMENSIONS

INDOOR UNIT

MSX-05NV- , MSX-09NV­MSX-12NV-

E1

Unit : mm

E1E1

OUTDOOR UNIT

MUX10NV-

E1

9

16 310 16

290

530

605

292

20

500

Bolt pitch for installation

50

90 57 57 57

Service port

Stop valve

3/8F

A

154.6

Service portBC

Gas side
union

3/8F

Liquid side
union

1/4F

Stop valve 1/4F

30

52

186

70 66

Electrical wiring entrance (Rear) 15 25

Unless any
obstacle exists
in right ,left ,
and rear sides.

C

B

Unless any
obstacle exists
in front, right
and left sides.

REQUIRED SPACE

4 holes-10 21

34

35

5480

236

91

51

168

57

850

133

Air out

Air in

4 Drain holes [

16.2

Air in

10cm or more

50cm or more

35cm or more

10cm or more

10cm or more

A

OUTDOOR UNIT

MUX-18NV-

E1

MUX-24NV-

Handle for moving

10

E1

Air in

34330

750

27

200 200500

Air in

Air out

900

328

2-Oval hols(12Å~36)
(Base bolt M10)

2-U-Shape noched hols
(Base bolt M10)

29

412

372

53

Handle for moving

72.2

58.2

5050505050

50
50

64.8

264.2

Wiring hole

Liquid pipe
(flared ɔ6.35)

Gus pipe
(flared ɔ12.7)

Gus pipe
(flared ɔ9.52)

WHT

WHT

BRN

F13

F12

CIRCUIT BREAKER

WHT

1

TB2

2

TB2

TB3
1

BLU

BLU

BLK

RED

C2

221

1

43

X1

4X23

BLU

BLU

BLU

BLU

RED

YLW

RED

YLW

BLU

BRN

BLU

BLU

BLU

BRN

WHT

BRN

WHT WHTBRN

NO COM

52C1

NO

52C2

COM

3

1

RED

BLU

RED

BLK

21R2

21R1

21R

52C1

TB

52C2

MF

WHT

2

WHT

1

51C

R

S

MC

C

X2

N

L

POWER SUPPLY
220-240V

50Hz

GRN/YLW

BLK

12VDC

12VDC

WHT

ORN

GRY

TO INDOOR
UNIT No.A
CONNECTING

X1

1

2

1

2

TO INDOOR
UNIT No.B
CONNECTING

2

TB3

C1

CIRCUIT BREAKER

POWER
SUPPLY
CORD

50Hz

F12

12VDC

12VDC

TO OUTDOOR
UNIT
CONNECTING

TB

2

1

1

1

2

L

N

2

CN202

1

BLU

BLU

BLU

BLK

WHT

BRN

BRN

BLU

BLU

GRN/YLW

GRN/YLW

220-240V

~/N

GUARD

PLATE

TRANS

HIC1

MV

POWER MONITOR,

RECEIVER
P.C.BOARD

REMOTE
CONTROLLER

F11

NR11

ELECTRONIC CONTROL P.C BOARD

1

122

CN

TAB12

5

LD101

151

CN

CN201

MF

RT11

RT12

SR11

C11

5

4

3

2

6

1

3
2
1

3

CN211

111

CN

CN
112

121

CN

RED

WHT

BRN

YLW

GRY

BLK

5

WIRING DIAGRAM

INDOOR UNIT

MODELS MSX-05NV- , MSX-09NV- , MSX-12NV-

❈

❈

SYMBOL

C11
F11

MF
MV

NAME
INDOOR FAN CAPACITOR
FUSE(3.15A)
FAN MOTOR
VANE MOTOR

SYMBOL

NR11
RT11
RT12
SR11

NAME
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL TEMPERATURE THERMISTOR
SOLID STATE RELAY

NOTE:1. About the outdoor side electric wiring refer to the outdoor electric wiring diagram for servicing.

2. Use copper conductors only.(For field wiring)

3. Symbols below indicate.
: Terminal block, : Connector

SYMBOL

HIC1

TB

F12

E1E1E1

NAME
DC/DC CONVERTER
TERMINAL BLOCK
FUSE (93;)

OUTDOOR UNIT

MODEL MUX-10NV-

E1

❈

❈

❈

❈

❈

❈
❈

❈

❈

❈
❈

❈

SYMBOL

TB,TB2,TB3

TERMINAL BLOCK
RELAY(A)

X1

RELAY(B)

X2

21R
21R1
21R2

BYPASS VALVE SOLENOID COIL
SOLENOID COIL(A)
SOLENOID COIL(B)

.

NAME

SYMBOL

C1

COMPRESSOR CAPACITOR

C2

OUTDOOR FAN CAPACITOR
F12
F13
MC

MF

NOTE:1. Use copper conductors only.(For field wiring)

FUSE(2A)

FUSE(2A)

COMPRESSOR(B,C)

FAN MOTOR

2. Symbols below indicate.
: Terminal block, : Connector

3. ❈ on the wiring diagram shows the terminals with a lock mechanism, so it 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

NAME

OVER CURRENT RELAY(INNER THERMOSTAT)

51C1
52C1

COMPRESSOR CONTACTOR(A)

52C2

COMPRESSOR CONTACTOR(B)

① Slide the sleeve.
➁ Pull the wire while pushing the locking

lever.

11

TO INDOOR
UNIT No.A
CONNECTING

TO INDOOR
UNIT No.B
CONNECTING

TO INDOOR
UNIT No.C
CONNECTING

POWER SUPPLY
220-240V

50Hz

BRN

WHT

F14

BLU

GRY

F13

CIRCUIT BREAKER

YLW

RED

BRN

BLU

BLU

BLU

WHT

F12

BLU

BLU

BLU

GRY

1

TB3

TB2

1

43

43

12VDC

12VDC

12VDC

BLU

BLU

BLU

YLW

GRN/YLW

BLK

WHT

ORN

RED

YLW

51C2

BRN

YLW

BRN

BLU

WHT

WHT

WHT

RED

REDBLU

WHT

BRN

2

TB2

X2

X1

1

2

1

2

C2

C1

R

C

C

S

MC2

BLK

52CA

BLU

52C2

21R2

RED 2

X2

X1

COMNO

52CA

3

X12

5

1

MC1

51C1

1

1

52C1

X11

X11

21R

X11

X12

21R1

X12

C3

TB

52C1

52C2

1

2

L
N

4

78

4

6

2

6

2

2

87

3

1

5

3

2

4

43

BRN

BLU

BRN

BRN

WHT

GRY

WHT

BLU
BLU

R

MF

BLK

ORN
WHT

YLW

RED

BLK

5

4

2
3

1

RED

YLW

BLK

WHT

ORN

RED

GRY

S

1

1

OUTDOOR UNIT

MODEL MUX-18NV-

❈

E1

SYMBOL

C1
C2

C3
MC1
MC2

MF
F12
F13

❈

❈
❈

❈

❈

❈

❈

NAME
COMPRESSOR CAPACITOR(A)
COMPRESSOR CAPACITOR(B,C)
OUTDOOR FAN CAPACITOR
COMPRESSOR(A)
COMPRESSOR(B,C)
FAN MOTOR(INNER THERMOSTAT)
FUSE(2A)
FUSE(2A)

❈1

❈2

❈1

❈2
❈1

❈2

SYMBOL

TB
X11
X12

21R
21R1
21R2

F14

TB2,TB3

❈

❈

❈

❈

❈

❈

NAME
TERMINAL BLOCK
FAN MOTOR RELAY(A)
FAN MOTOR RELAY(B,C)
SOLENOID COIL
SOLENOID COIL(B)
SOLENOID COIL(C)
FUSE(2A)
TERMINAL BLOCK

SYMBOL

51C1
51C2
52CA
52C1
52C2

X1
X2

NAME

OVER CURRENT RELAY(A)INNER THERMOSTAT
OVER CURRENT RELAY(B,C)INNER THERMOSTAT

COMPRESSOR CONTACTOR(A)
COMPRESSOR CONTACTOR(B)
COMPRESSOR CONTACTOR(C)
RELAY(B)
RELAY(C)

NOTE:1. Use copper conductors only.(For field wiring)

2. Symbols below indicate.
: Terminal block, : Connector

3. ❈ on the wiring diagram shows the terminals with a lock mechanism, so it cannot be removed when you pull the lead wire Be sure to pull the wire by

.

① Slide the sleeve.
➁ Pull the wire while pushing the locking

lever.

pushing the locking lever (projected part) of the terminal with a finger

12

OUTDOOR UNIT

POWER SUPPLY
~/N

220-240V
50Hz

CIRCUIT

BREAKER

TO INDOOR
UNIT No.A
CONNECTING

TO INDOOR
UNIT No.B
CONNECTING

TO INDOOR
UNIT No.C
CONNECTING

TO INDOOR
UNIT No.D
CONNECTING

MODEL MUX-24NV-

4

❈

❈

❈

❈

BRN

BLU

BLU

BLU

BLU

4

BRN
BLU

21R1

21R2

21R3

21R4

52C1

52C2

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

3

3

BRN

ORN

ORN

ORN

ORN

4

TB

L
N

GRN/YLW

2

TB1

1

12VDC

2

TB2

1

12VDC

2

TB3

1

12VDC

2

TB4

1

12VDC

YLW

❈

❈

YLW

ORN

❈

❈

ORN

WHT

❈
❈

WHT

GRY

❈

❈

GRY

X1

X2

X3

X4

❈2

❈2

❈2

❈1

❈2

BRN

❈

❈1

❈1

❈1

❈

F

BRN

❈

BRN

BRN

BRN

BRN

❈

❈

❈

BRN

X1

4

X2

4

X3

4

X4

4

3

3

3

3

E1

5

GRY

ORN

WHT
YLW

1

RED

2
3

1

RED

2
3

BRN

1

WHT

1
2
3
4
5
6

C

WHT

MC1

S

R

BLK

C

WHT

MC2

S

R

BLK

1

❈

3

X11

5

❈

RED
ORN
WHT

MF

BLK

WHT

WHT

3

52C4

WHT

2
BLU

BLU

2

2

2

BLU

BLU

TB6

BLU

BLU

2

1

WHT

BLU

BLU

BLU

BLU

❈

7

X12

BLU

21RB

7
2

BLU

321

BLU

21RA

21

X11

TB5

BLU

8

BLU

BLU

BLU

ORN

8

WHT

52C3

3

4

BLU

1
2

52C1

1

BLU

1
2

52C2

1

BLU

1
2
3

52C3

1

BLU

1
2
3

52C4

1

TB7

BLU

12

WHT

RED

C1

BLK

BLU

WHT

RED
C2

❈

BLK

3

X12

C11

SYMBOL

C1
C2

C11
MC1
MC2

MF

F
21RA
21RB

MODEL MUX-24NV-

TB

L

POWER SUPPLY
~/N

220-240V

50Hz

CIRCUIT

BREAKER

TO INDOOR
UNIT No.A
CONNECTING

TO INDOOR
UNIT No.B

CONNECTING

TO INDOOR
UNIT No.C
CONNECTING

TO INDOOR
UNIT No.D
CONNECTING

NAME
COMPRESSOR CAPACITOR(A,B)
COMPRESSOR CAPACITOR(C,D)

FAN MOTOR CAPACITOR
COMPRESSOR(A,B)
COMPRESSOR(C,D)
FAN MOTOR(INNER THERMOSTAT)
FUSE(3.15A)
SOLENOID COIL
SOLENOID COIL

N

GRN/YLW

2

TB1

1

12VDC

2

TB2

1

12VDC

2

TB3

1

12VDC

GRY

2

TB4

1

12VDC

YLW

❈
❈

YLW

ORN

❈

❈

ORN

WHT

❈
❈

WHT

❈

❈

GRY

BRN

❈2

X1

❈1

❈2

X2

❈1

❈2

X3

❈1

❈2

X4

❈1

BRN

2

BRN

TB10

BRN

BRN

1

BRN

❈

F

❈

X1

❈

BRN

4

3

BRN

X2

❈

4

3

BRN

X3

❈

4

3

BRN

X4

❈

4

3

BRN

SYMBOL

TB
X11
X12

21R1
21R2
21R3
21R4

TB1~TB10

E1

4

3

52C1

4

52C2

BRN

BLU

BLU

21R1

BLU

BLU

❈

BLU

21R2

BLU

BLU

❈

BLU

21R3

BLU

BLU

❈

BLU

21R4

BLU

BLU ORN

❈

WHT

3

WHT

4

3

52C4

4

3

52C3

BLU

1
2

ORN

52C1

1

2

BLU

1
2

ORN

52C2

2

1

BLU

1
2
3

ORN

52C3

1

BLU

1
2
3

52C4

1

TERMINAL BLOCK
FAN MOTOR RELAY(A,B)
FAN MOTOR RELAY(B,C)
SOLENOID COIL(A)
SOLENOID COIL(B)
SOLENOID COIL(C)
SOLENOID COIL(D)
TERMINAL BLOCK

(Product number 700501~)

1

WHT

TB9

2

WHT

BLU

BLU

BLU

BLU

BLU

7

X12

BLU

21RB

21RA

21

X11

7

TB5

BLU

BLU

8

BLU

321

BLU

WHT

BLU

BLU

ORN

8

❈

2

2

1

1

TB7

WHT

BLU

BLU

2

BLU

2

NAME

BLU

TB8

BLU

BLU

WHT

BLU

TB6

BLU

12

2

1

WHT

RED

C1

BLK

BLU

WHT

RED

C2

BLK

3

X12

5

GRY

C11

ORN
WHT
YLW

SYMBOL

52C1
52C2
52C3
52C4

X1
X2
X3
X4

C

MC1

S

R

C

MC2

S

R

BRN

❈

3

1

1

X11

WHT

5

❈

RED

1

ORN

2

WHT

MF

3

BLK

4
5
6

COMPRESSOR RELAY(A)
COMPRESSOR RELAY(B)
COMPRESSOR RELAY(C)
COMPRESSOR RELAY(D)

RELAY(A)
RELAY(B)
RELAY(C)
RELAY(D)

NAME

NOTE:1. Use copper conductors only.(For field wiring)

2. Symbols below indicate.
: Terminal block, : Connector

3. ❈ on the wiring diagram shows the terminals with a lock mechanism, so it 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

.

① Slide the sleeve.
➁ Pull the wire while pushing the locking

lever.

13

OUTDOOR UNITINDOOR UNIT

UNIT A

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

UNIT B

Indoor

heat

exchanger

Outdoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

(option)
(With insulation)

Refrigerant pipe

9.52 (3/8)

(option)
(With insulation)

Refrigerant pipe

9.52 (3/8)

Flared connection

(option)
(With insulation)

Refrigerant pipe

6.35 (1/4)

(option)
(With insulation)

Refrigerant pipe

6.35 (1/4)

Flared connection

Stop valve
with service port

Solenoid valve
21R1

Solenoid valve
21R

Solenoid valve
21R2

Capillary tube

1.4 x 400

Capillary tube

1.4 x 400

Capillary tube

Capillary tube

1.4 x 200

1.6 x 1,000

Compressor

Refrigerant flow

Stop valve
with service port

Stop
valve

Stop
valve

6

REFRIGERANT SYSTEM DIAGRAM

MSX-05NV-

E1

MUX-10NV-

E1

Unit : mm

MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

Indoor unit A

MSX-05NV

Outdoor unit

MUX-10NV

ADDITIONAL REFRIGERANT CHARGE (R-22:g)

MSX-10NV

A

E1

- precharged 7m 8m 9m 10m 11m 12m 13m 14m 15m

B

unit+ unit 1150g 0 10 20 30 40 50 60 70 80

Outdoor unit refrigerant piping length (one way,2unit total)

PIPING PREPARATION

1 Table below shows the specifications of pipes commercially available.

UNIT No. Pipe

and

BA

UNIT

For liquid 6.35 1/4 6 mm Heat resisting foam plastic

For gas 9.52 3/8 6 mm 0.045 specific gravity

E1

2 Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3 Refrigerant bending radius must be 10cm or more.

14

E1

Additional piping max. length 10m

Outside diameter Insulation

mm inch thickness

Indoor unit B

MSX-05NV

E1

Max. length
difference
5m

Insulation material

Unit : mm

MSX-09NV-

INDOOR UNIT

UNIT A

MSX-09NV

MSX-09NV

E1

UNIT B

E1

E1

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

Room
temperature
thermistor
RT11

Room
temperature
thermistor
RT11

Refrigerant pipe

9.52<3/8>
(option)
(With insulation)

Flared connection

Refrigerant pipe

6.35<1/4>

(option)
(With insulation)

Refrigerant pipe

9.52<3/8>

(option)
(With insulation)

Flared connection

Refrigerant pipe

6.35<1/4>
(option)
(With insulation)

Refrigerant pipe

9.52<3/8>

Stop valve
with service port

Stop valve

Capillary tube

Stop valve
with
service port

Solenoid valve
21R1

Capillary tube

1.4 ✕ 600

1.4 ✕ 1000

Compressor(A)

Solenoid valve
21R

Capillary tube

1.4 ✕ 150

Capillary tube

1.6 ✕ 1,000

Compressor(B,C)

Stop valve
with
service port

MUX-18NV-

OUTDOOR UNIT

Outdoor

heat

exchanger

E1

UNIT C

MSX-09NV

E1

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Flared connection

Refrigerant pipe

6.35<1/4>
(option)
(With insulation)

Refrigerant flow

Solenoid valve
21R1

Capillary tube

1.4 ✕ 600

15

LA

Indoor unit A

MSX-09NV - E1

HL

B HLC

H

Indoor unit B

MSX-09NV - E1

Indoor unit C

MSX-09NV - E1

Outdoor unit

MUX-18NV - E1

MSX-09NV-

E1

MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

Max.
limits

UNIT No.

A
B
C

LA
LB
LC

Pipe length

10m
10m

10m

L

B

+

LC

Total

15m

Height difference (H)

5m
5m
5m

Note: The length of piping to individual units (A,B,C) should not exceed 10 meters.

If units B and C are linked, the maximum combined length of piping should not exceed 15 meters.

ADDITIONAL REFRIGERANT CHARGE (R-22:g)

Refrigerament piping length (one way)

Refrigerament piping length (one way,2 unit total)

9m

30

10m4511m

60

12m7513m9014m

A

unit

CB

unit + unit

Outdoor unit

precharged

750g

Outdoor unit

precharged

750g

7m 8m 9m 10m

0153045

7m

0

8m

15

PIPING PREPARATION

1Table below shows the specifications of pipes commercially available.

UNIT No.

BA

, and

C

unit

Pipe

For liquid

For gas

Outside diameter

mm inch

6.35 1/4

9.52 3/8

Insulation

thickness

6mm
6mm

Insulation material

Heat resisting foam plastic

0.045 specific gravity

No. of bends

10
10
10

105

Total

15

15m

120

2Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3Refrigerant bending radius must be 10cm or more.

16

MSX-09NV-

OUTDOOR UNITINDOOR UNIT

UNIT A

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

UNIT B

Indoor

heat

exchanger

Outdoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

(option)
(With insulation)

Refrigerant pipe
{12.7 (1/2)

(option)
(With insulation)

Refrigerant pipe
{12.7 (1/2)

Flared connection

(option)
(With insulation)

Refrigerant pipe

{6.35 (1/4)

(option)
(With insulation)

Refrigerant pipe

{6.35 (1/4)

Flared connection

Stop valve
with service port

Solenoid valve
21R1

Solenoid valve
21RA

Solenoid valve
21R2

Capillary tube

{1.6 x 400

Capillary tube

{1.6 x 400

Capillary tube

Capillary tube

{1.8 x 260

{1.6 x 1,000

Compressor

Refrigerant flow

Stop valve
with service port

Stop
valve

Stop
valve

UNIT C

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

UNIT D

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

(option)
(With insulation)

Refrigerant pipe

{9.52 (3/8)

(option)
(With insulation)

Refrigerant pipe

{9.52 (3/8)

Flared connection

(option)
(With insulation)

Refrigerant pipe
{6.35 (1/4)

(option)
(With insulation)

Refrigerant pipe

{6.35 (1/4)

Flared connection

Stop valve
with service port

Solenoid valve
21R3

Solenoid valve
21RB

Solenoid valve
21R4

Capillary tube

{1.6 x 650

Capillary tube

{1.6 x 650

Capillary tube

Capillary tube

{1.6 x 400

{1.6 x 1,000

Compressor

Stop valve
with service port

Stop
valve

Stop
valve

MSX-12NV- E1

MSX-12NV- E1

MSX-09NV- E1

MSX-09NV- E1

MSX-12NV-

E1
E1

MUX-24NV-

E1

Unit : mm

17

MSX-09NV­MSX-12NV-

E1
E1

MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

Indoor unit A

MSX-12NV- E1

Indoor unit B

MSX-12NV- E1

Indoor unit C

MSX-09NV- E1

Indoor unit D

MSX-09NV- E1

Outdoor unit

MUX-24NV- E1

Max.
limits

UNIT No.

A
B
C
D

LA

LB
LC
LD

Pipe length
20m
20m
20m
20m

LA

+

LB
LC

+

LD

Total

30m

Total

30m

Height difference (H)

10m
10m
10m
10m

10
10
10
10

Note: The length of individual units (A,B,C,D) should not exceed 20 meters.

If units Aand B or C and D are linked, the maximum combined length of piping should not exceed 30 meters.

HLDHLCHLBHLA

No. of bends

Total

15

Total

15

ADDITIONAL REFRIGERANT CHARGE (R-22g)

UNIT No.

BA

unit + unit

DC

unit + unit

Outdoor unit

precharged

1150g
1150g

9m10m11m12m13m14m15m16m17m18m19m20m21m22m23m24m25m26m27m28m29m30

0 102030405060
0

10 20 30 40 50 60

Refrigerament piping length (one way, 2 unit total)

PIPING PREPARATION

UNIT No.

BA

and unit

DC

and unit

Pipe

For liquid

For gas

For liquid

For gas

Outside diameter

mm inch

6.35 1/4

12.7

6.35

9.52

1/2
1/4
3/8

m

70 80 90 100 110 120 130 140 150 160 170 180 190 200 210
70 80 90 100 110 120 130 140 150 160 170 180 190 200 210

Insulation

thickness

6mm
6mm
6mm
6mm

Insulation material

Heat resisting foam plastic

0.045 specific gravity

18

Close

Open

Stop valve

Connection pipe

Gage manifold valve

Hexagonal
wrench

Vacuum pump

B unit
side

Service
port

Stop valve

Stop valve

Cap

Gas pipe

Liquid pipe

MUX-10NV­MUX-24NV-

Connect the gage manifold valve and the vacuum pump to the service port of the stop valve on the
liquid pipe side of the outdoor unit.

Run the vacuum pump (Vacuumize for more than 15 minutes.) and at this time confirm that the pres­sure gage shows -0.1 MPa (-76cmHg).

Check the vacuum with the gage manifold valve, then close the gage manifold valve, and stop the
vacuum pump.

Leave it as is for one or two minutes. Make sure the pointer of the gage manifold valve remains in
the same position.

E1
E1

PURGING PROCEDURES

Connect the refrigerant pipes (both the liquid and gas
pipes) between the indoor and the outdoor units.

Remove the service port cap of the stop valve on the side of
the outdoor unit gas pipe. (The stop valve will not work in its
initial state fresh out of the factory (totally closed with cap on).)

MUX-10NV-

E1

MUX-24NV-

Remove the gage manifold valve quickly from the service port of the stop valve.

After refrigerant pipes are connected and evacuated, fully open all stop valves on
gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.

MUX-10NV-

Pipe lenght

7m maximum

No gas charge is

needed.

E1

Pipe lenght

exceeding 7m

Charge the prescribed

amount of gas.

MUX-24NV-

Pipe lenght

9m maximum

No gas charge is

needed.

E1

Pressure gaugeCompound pressure gauge

Manifold valve

Handle Lo

Charge
hose

E1

Handle Hi

Vacuum

pump

Pipe lenght

exceeding 9m

Charge the prescribed

amount of gas.

Tighten the cap to the service port to obtain the initial status.

Retighten the cap.

Leak test

19

Hexagonal
wrench

Cap

Service valves or
stop valves (4 pcs.)

Gage manifold valve

Connection pipe

Vacuum pump

Outdoor unit

Service valve
or stop valve
for UNIT

A

Service port
(check joint)

Liquid

Gas

A

UNIT

Gage manifold valve

Connection pipe

Vacuum pump

Outdoor unit

Service valve
or stop valve
for and
UNIT

B

C

B

C

Service port (check joint)

Liquid

Liquid
Gas

UNIT

UNIT

MUX-18NV-

E1

EVACUATION PROCEDURES

● Conduct air purging B unit and C unit, then Aunit.

● Conduct purging in the piping and indoor unit concurrently by using the service valve or stop valve of outdoor unit.

(1) Connect the refrigerant piping (both of the liquid pipe and gas pipe) between the indoor “ (and ) UNIT” and out-

CB

door units.

(2) Connect the gage manifold valve and the vacuum pump to the service port of service valve (lower (gas) side) for

“B(and C) UNIT”.

(3) Run the vacuum pump (Vacuumize for more than 15 minutes.) and at this time confirm that the pressure gage shows

-0.1MPa.
(4) Check the vacuum with the gage manifold valve, then close the gage manifold valve, and stop the vacuum pump.
(5) Leave it as is for one or two minutes. Make sure the pointer of the gage manifold valve remains in the same position.
(6) Remove the gage manifold valve quickly from the service port of the stop valve.
(7) Tighten the cap to the service port ot obtain the initial status.

(8) Connect the refrigerant piping (both of the liquid pipe and gas pipe) between the indoor “A UNIT” and outdoor units.
(9) Connect the gage manifold valve and the vacuum pump to the service port of stop valve (gas pipe side) for “A UNIT”.
(10) Run the vacuum pump (Vacuumize for more than 15 minutes.) and at this time confirm that the pressure gage shows

-0.1MPa.
(11) Check the vacuum with the gage manifold valve, then close the gage manifold valve, and stop the vacuum pump.
(12) Leave it as is for one or two minutes. Make sure the pointer of the gage manifold valve remains in the same position.
(13) Remove the gage manifold valve quickly from the service port of the stop valve.
(14) Tighten the cap to the service port to obtain the initial status.

● Turn valve rod of service valves or stop valves in counter clockwise direction it contacts the opposite side, that is until
the valves are fully opened.

● Fit back the cap of valve rod service valves or stop valves.

● Leak test

Using a gas leak detector or soap water, confirm that the refrigerant gas is not leaking from the flare nut connection.

CAUTION

● Connect refrigerant pipes of unit first, then connect unit, finally connect unit.(If you connect unit first, you
cannot connect unit.)

● Both refrigerant pipes and indoor and outdoor connecting wires are supposed to be connected properly in accordance

B

with unit references such as unit, unit, and unit.

20

CBA

AACB

7

PERFORMANCE CURVES

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions.
Since operating conditions vary according to the areas where these units are installed.
The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions
indicated by the performance curve.

(1) GUARANTEED VOLTAGE

Voltage rating: ±10% (198~264V) 50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature: °CWB
(2) Indoor discharge air wet-bulb temperature: °CWB
(3) Outdoor intake air dry-bulb temperature: °CWB
(4) Total input: W

Indoor air wet- bulb temperature difference on the left side of the chart on next page shows the difference between the
indoor intake air wet-bulb temperature and the indoor discharge air wet-bulb temperature for your reference at service.

How to measure the indoor air wet-bulb temperature difference

1. Attach at least 2 sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets
of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air
speed is high.

2. Attach at least 2 sets of dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of
the sun.

3. Make sure the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY ON/OFF button to start the EMERGENCY operation.

6. When system stabilizes after more than15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and make sure the temperature does not change.

OUTDOOR UNITINDOOR UNIT

1.CAPACITY AND THE INPUT CURVES (ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)

9.1

8.3

7.6

6.9

6.2

5.5

Indoor air WB temperature

difference (deg.)

8.9

8.2

7.4

6.7

6.0

5.4

10.1

9.3

8.4

7.6

6.8

6.1

1.4

10.4

9.4

8.5

7.6

6.8

MSX-10NV- E1

MSX-18NV- E1

MSX-24NV- E1

MSX-24NV- E1

(MSX-09NV- E1 )

(MSX-12NV- E1 )

21

2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

COOL operation

① Both indoor and outdoor unit are under same temperature/humidity condition.

Dry-bulb temperature Relative humidity (%)

20
25
30

➁ Air flow should be set at MAX.

MUX-10NV-

E1

50
60
70

MUX-18NV-

MUX-24NV-

E1

E1

22

8

MICROPROCESSOR CONTROL

Wireless remote controller

MSX-05NV- , MSX-09NV- , MSX-12NV-

Once the controls are set, the same operation mode can be
repeated by simply turning the OPERATE/STOP button ON.
Indoor unit receives the signal with a beep tone.
When the system turns off, 3-minute time delay will operate to
protect system from overload and compressor will not restart
for 3 minutes.

1. “I FEEL CONTROL” (h) OPERATION

E1E1E1

(1) Press OPERATE/STOP button on the remote con-

troller. OPERATION INDICATOR LAMP of the
indoor unit will turn on with a beep tone.

(2) Press OPERATION SELECT button to set “I FEEL

CONTROL”(h) Then a beep tone is heard.

(3) The operation mode is determined by the initial

room temperature at start-up of the operation.

Initial room temperature mode

.

more than 25:

13: to 25:

COOL mode of

I FELL CONTROL

DRY mode of

“I FELL CONTROL”

INDOOR UNIT DISPLAY SECTION

● Once the mode is fixed, the mode will not change
by room temperature afterwards.

● Under the ON-TIMER (w – ) operation, the mode is
determined according to the room temperature as the
operation starts.

● When the system is stopped with the
OPERATE/STOP button on the remote controller,
and restarted within 2 hours in “I FEEL CONTROL”
(h) mode, the system operates in previous mode
automatically regardless of the room temperature.

Example

Previous operation
COOL mode of
“I FEEL CONTROL”

or COOL mode

OFF ONON

2 hours

● When the system is restarted after 2 hours, the operation
mode is determined by the initial room temperature at
start-up of the operation.

Example

Previous operation

COOL mode of

“I FEEL CONTROL”

or COOL mode

OFFON

Restart
COOL mode of
“I FEEL CONTROL”

COOL or DRY mode of
“I FEEL CONTROL” that
determined by initital
room temperature start­up of the operation.

2 hours

23

(4) The initial set temperature is decided by the initial room temperature.

Model Initial room temperature Initial set temperrature

COOL mode of 26: or more 24:

“I FEEL ❈ 1

CONTROL” 26: or less

DRY mode of

“I FELL CONTROL” minus 2:

❈1 After the system restarts by the remote controller, the system operates with the previous set temperature regardless of

the initial set temperature.
The set temperature is calculated by the previous set temperature.

(5) TEMPERATURES buttons

In “I FEEL CONTROL” (h) mode, set temperature is decided by the microprocessor based on the room temperature.
In addition, set temperature is controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm.
Pressing the TOO WARM or TOO COOL button emits a beep tone.

13: to 25:

Initial room temperature
minus 2:
Initial room temperature

● Fuzzy control

When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, considering
the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user’s preference to heat or
cold. So this is called “Fuzzy control”, and works only in “I FEEL CONTROL” mode.
In DRY mode of “I FEEL CONTROL”, the set temperature doesn’t change.

▼ TOO
COOL… To raise the set temperature 1~2 degrees(°C)

▲ TOO
WARM … To lower the set temperature 1~2 degrees(°C)

24

— COOL mode of “I FEEL CONTROL” —

ON

Compressor and
outdoor fan motor

Indoor fan motor

OFF

ON

ON

OFF

Run continuously in cooling mode

NOTE : Coil frost prevention during COOL mode of “I FEEL CONTROL”

There are two types of controls in coil frost prevention.

① Temperature control

When the indoor coil thermistor RT12 reads 4°C or below for 5 minutes, the coil frost prevention mode starts.
The compressor stops and the indoor fan operates at the set speed for 5 minutes.
After that, if RT12still reads below 4°C this mode prolonged until the RT12 reads over 4°C.

② Time control

When the three conditions below have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes.
a. Compressor has been continuously operating.
b. Indoor fan speed is Lo or Me.
c. Room temperature is below 26°C.
When compressor turns off half way, the accumulated time is cancelled.
When compressor turns on again, time counting starts from the beginning.
When the indoor fan speed becomes Hi or the room temperature exceeds 26°C, time counting stops temporarily.
After, when the above conditions are satisfied again, time counting restarts.
The indoor fan operates at set speed.

● Indoor fan operates at the set speed by FAN CONTROL switch.
Followings are the fan speed in AUTO.

Room temperature minus set temperature : more than 2 ~ 4 degrees (°C)··············Hi
Room temperature minus set temperature : 1 ~ 4 degrees (°C) ·····························Me
Room temperature minus set temperature : less than 1 ~1.5 degrees (°C)·············Lo

—DRY mode of “I FEEL CONTROL”—

The system for dry operation uses the same refrigerant circuit as the cooling circuit.
The compressor and the indoor fan are controlled by the temperature and the microprocessor.
By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature
decrease.
The operation of the compressor and indoor fan is as follows.

1. When the room temperature is 23°C or over:

Compressor operates by temperature control and time control.

① Set temperature is controlled to fall 2°C as initial set temperature.
② When the thermostat is ON, the compressor repeats 8 minutes ON and 3 minutes OFF.

When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.
Indoor fan and outdoor fan operate in the same cycle as the compressor.

1 deg.

1.5 deg.

2 deg.

4 deg.

2. When the room temperature is under 23°C.

When the thermostat is ON, the compressor repeats 2 minutes ON and 3 minutes OFF.
When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.

25

Operation time chart

Example

1st ON

ON

Thermostat

Indoor fan

Outdoor fan
compressor

8 min. 1 min.3 min.

NOTE ● Coil frost prevention during DRY mode of “I FEEL CONTROL”

The operation is same as coil frost prevention during COOL mode of “I FEEL CONTROL” excepting the
indoor fan is OFF.

● Coil frost becomes the fan speed Lo during the indoor fan is OFF.
(Because the coil frost prevention is priority.)

2. COOL (

(1) Press OPERATE/STOP button.

(2) Select COOL mode.
(3) Set the TEMPERATURES button.

3. DRY (

(1) Press OPERATE/STOP button.

(2) Select DRY mode.
(3) The microprocessor reads the room temper-

(4) DRY operation will not work when the room
(5) When DRY operation works, the fan speed is

ff

) OPERATION

OPERATION INDICATOR of the indoor unit
turns on with a beep tone.

(TOO WARM or TOO COOL button)
The setting range is 16 ~ 31°C
✻ Indoor fan continues to operate regardless

of thermostat’s OFF-ON

✻ Coil frost prevention is same as COOL

mode of “I FEEL CONTROL”

ee

) OPERATION

OPERATION INDICATOR of the indoor unit
turns on with a beep tone.

ature and determines the set temperature.
Set temperature is as shown in the right
chart.
Thermostat (SET TEMP.)is not work.
The other operations are same as DRY
mode of “I FEEL CONTROL”.

temperature is 13°C or below.
lower than cool operation.

OFF

OFF

OFF

OFF

OFF

ONONON

ONONON

26

4.FAN OPERATION

(1)Press OPERATION/STOP button.
(2)Select FAN mode.
(3)Select the desired fan speed.When AUTO,it becomes Lo.(Only DRY operation.)

Only indoor fan operates.Outdoor unit does not operate.

5. FAN MOTOR CONTROL

(1) Rotational frequency feedback control

The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feedback

the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (Hi,Me.Lo) the
microprocessor controls SR11 and adjusts fan motor electric current to make the current rotational frequency close to the
target rotational frequency. With this control, when the fan speed is switched, the rotational frequency changes smootly.

Rotational frequency

Hi

Me

Lo

New control

Hi

time

(2) Fan motor lock-up protection

When the rotational frequency feedback signal is not output for 12 seconds, (or when the microprocessor cannot detect the

signal for 12 seconds) the fan motor is regarded locked-up. Then the electric current to the fan motor is shut off. 3 minutes
later, the electric current is applied to the fan motor again. During the fan motor lock-up, the operation indicator flashes to
show the fan motor abnormality. (See page 32.)

6. AUTO VANE OPERATION

(1) Vane motor drive

MSX-N series is equipped with a stepping motor for the vane. The rotating direction, speed, and angle of the motor are

controlled by plus signals (approx. 12V) transmitted from indoor microprocessor.

(2) The auto vane angle changes as follows by pressing the VANE CONTROL “” button.

AUTO 1

2 3

4 5

Horizontal Middle Downward

(3) Positioning

The vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle.
The positioning is decided as follows.
(a) When the operate button is pushed. (POWER ON)
(b) When th stop button is pushed. (POWER OFF)
(c) When the vane control change AUTO to MANUAL.
(d) When the SWING is finished.
(e) When the test run starts.
(f ) When the power supply is ON.

27

(4) VANE AUTO ( ) mode

In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum

room-temperature distribution.

① In COOL and DRY operation

Vane angle is fixed to Angle 1.

➁ In FAN operation

Vane angle is fixed to Angle 4.

(5) Dew prevention

During COOL or DRY operation with the vane angle at Angle 4 or 5 when the compressor cumulative operation the

exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention.

(6) SWING MODE ( )

By pressing the SWING button “” vane swings vertically. The remote controller displays “” SWING mode is can-

celled when the SWING button is pressed again or the operation stops or changes to other mode or VANE button is
pressed.

7. SLEEP MODE ()

• When the sleep button “” is pressed, the indoor fan speed drops and the air flow sound from the indoor unit is
decrecsed.

• The indications of the remote controller are “” and “”.

• When the button is pressed during the SLEEP mode operation, the SLEEP made is released.

8. TIMER OPERATION

1. How to set the timer.
(1) Press OPERATE/STOP button to start the air conditioner.
(2) Check that the current time is set correctly.
NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display

of TIMER MONITOR so set the current time, correctly with CLOCKSETTING button.

(3) Press TIMER CONTROL button to select the operation.

“w –

” button... AUTO START operation (ON timer) Ascertain the OPERATION INDICATOR on the indoor unit lights.

l

“w – O” button... AUTO STOP operation (OFF timer)

(4) Press HR. and MIN. button to set the timer. Time setting is 10-minute units.

HR. and MIN, button will work when “w – l” or “w – O” mark is flashing.
These marks disappear in 30 seconds.

When setting the ON timer, check that OPERATION INDICATOR of the indoor unit lights.

NOTE1 : Be sure to place the remote controller at the position where its signal can reach the air conditioner even during

TIMER operation, or the set time may deviate within the range of about 10 minutes.

NOTE2 : Reset the timer in the following cases, or the set time may deviate and other malfunctions may occur.

● A power failure occurs.

● The circuit breaker functions.

2. CANCEL
Timer setting can be cancelled with the TIMER CONTROL buttons. (“w – l” or “w – O”)

To cancel the ON timer, press the “w – l” button.
To cancel the OFF timer, press the “w – O” button.

Timer is cancelled and the display of set time disappears.

28

PROGRAM TIMER

● The OFF timer and ON timer can be used in combination.

● ”” display shows the order of the OFF timer and ON timer operation order.

(Example 1) The current time is 8:00 PM.

The unit turns off at 11:00 PM, and on at 6:00 AM.

NOTE : TIMER setting will be cancelled by power failure or breaker functioning.

(Example 2) The current time is 11:00 AM.

The unit turns on at 5:00 PM, and off at 9:00 PM.

9. EMERGENCY-TEST OPERATION

When the remote controller is missing, has failed or the batteries run down, press the EMERGENCY ON/OFF button on the
front of the indoor unit. The unit will start and the OPERATION INDICATOR will light.
The first 30 minutes of operation will be the test run operation. This operation is for servicing. The indoor fan runs at high
speed and the system is in continuous operation. The thermostat is ON and the timer is reset to normal.
After 30 minutes of test run operation the system shifts to emergency run operation with a set temperature of 24°C
The fan shifts to MED speed.
This operation continues until the EMERGENCY RUN ON/OFF button is pressed or a button on the remote controller is
pressed, then normal operation will start.
The coil frost prevention circuit operates in this mode.
In the test run or emergency operation, auto vane operates in AUTO mode with the set temperature 24°C.

NOTE : Do not press the EMERGENCY ON/OFF button during normal operation.

Push 1 - time

<Coolong>
2 - times
<Stop>

29

9

SERVICE FUNCTIONS

1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the electronics control P.C. board.
The time will be shortened as follows.
3-minute delay : 3-minute ➔ 3-second.
AUTO START : 1 hour ➔ 1-minutes
AUTO STOP : 1 hour ➔ 1-minutes

Short the connector during the timer mode.

}

2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.
Remove batteries before modification.
The board has a print as shown below :

<The reset button can be located on the rear side.>

(1)How to modify the remote controller P.C. board

MSX-05NV- ,MSX-09NV-

The P.C.board has the print “J10” and “J20”.Jumper wires are mounted to each “J10” and “J20”.Replace J20 and J10 with
J21 and J11 according to the number of indoor unitw as shown in Table 1.
After modification,push the reset button near the batteries.

Table.1

No. 1 unit
No. 2 unit
No. 3 unit

No. 4 unit

Note : At power supply failure or installation, indoor unit deletes the memory about remote controller.

When the power supply is turned on and indoor unit receives the first signals from the remote controller, the remote

controller number is designated as the indoor unit number.
Therefore at and after the second time indoor unit accepts the remote controller of the initial setting number.
At setting-error, turn the power supply off to cancel the individual operation and then turn the power supply on to restart

the setting

1 unit operation
No modification

E1E1

NOTE : For remodeling, take out the batteries at first.

After finish remodeling, put back the batteries then push the RESET but­ton.

2 unit operation
Same as at left

-

-

-

Replace J10 with J11

-

-

3 unit operation

Same as at left
Same as at left

Replace J20 with J21

4 unit operation

Same as at left
Same as at left
Same as at left

-

Replace J10 with J11
Replace J20 with J21

<The reset button can be located on the front side.>

(2)How to modify the remote controller P.C. board

MSX-05NV- (Product number 7000501T~) ,MSX-09NV- (Product number 7000701T~) ,MSX-12NV-

E1E1E1

NOTE : For remodeling, take out the

batteries at first.
After finish remodeling, put
back the batteries then
push the RESET button.

The P.C.board has the print “J1” and “J2”.Jumper wires are mounted to each “J1” and “J2”.Cut J1 and J2 according to the
number of indoor unitw as shown in Table 1.
After modification,push the reset button near the batteries.

Table.1

No. 1 unit
No. 2 unit
No. 3 unit

No. 4 unit

Note : At power supply failure or installation, indoor unit deletes the memory about remote controller.

When the power supply is turned on and indoor unit receives the first signals from the remote controller, the remote

controller number is designated as the indoor unit number.
Therefore at and after the second time indoor unit accepts the remote controller of the initial setting number.
At setting-error, turn the power supply off to cancel the individual operation and then turn the power supply on restart

the setting

30

1 unit operation
No modification

-

-

-

2 unit operation
Same as at left

Cut J1

-

-

3 unit operation

Same as at left

Cut J2

-

4 unit operation

Same as at left
Same as at left
Same as at left

Cut J1
Cut J2

10

TROUBLESHOOTING

MSX-05NV- , MSX-09NV- , MSX-12NV-

10-1 Cautions on troubleshooting

10-1-1 Before troubleshooting, check the followings:

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for mis-wiring.

10-1-2 Take care the followings during servicing.

1) Be sure to unplug the power cord before removing the front panel, the cabinet, the top panel, and the P.C. boards.

2) When removing the P.C. board, hold the edge of the board with care NOT to apply stress on the components.

3) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

10-1-3 Troubleshooting procedure

1) First, check if the POWER LAMP on the indoor unit is flashing to indicate an abnormality. To make sure, check the
abnormality indication for 2 or 3 times before starting service work.

2) If the P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for
bursting and discoloration.

3) When troubleshooting, refer to the flow chart and the check table on page 28.

10-14 How to replace batteries

Weak batteries may cause the remote controller malfunction.
In this case, the remote controller can not be repaired only by the battery replacement. To operate the remote con­troller normally, discharge the remote controller in the following order.
This remote controller has the reset button. After refilling new batteries, press the reset button with tip end of ball point
pen or the like, and then use the remote controller.

E1E1E1

31

10-2 Instruction of troubleshooting

Start

Indoor unit oper­ates. Outdoor unit
doesn’t operate.

Outdoor unit
operates in
only Test
Run mode.

Check room
temperature
thermistor.

Outdoor unit
doesn’t oper­ate even in
Test Run
mode.

Refer to

DD

“Check of
outdoor unit”
on page 31.

Indoor unit
dosen’t receive
the signal from
remote
controller.

Refer to

BB

”Check of
receiver P.C.
board” on page

30.

Indoor unit operation
monitor lamp is flashing

2-time flash

2.5-second OFF
3-time flash

2.5-second OFF

Cause:Indoor unit
2-time-Room temperature/Indoor coil thermistor trouble.
3-times-Indoor fan motor trouble

Check indoor coil
thermistor. Refer
to“Test point dia­gram and voltage”
on page 32.

Refer to

AA

“Check of indoor
fan motor” on
page 30.

Indoor unit doesn’t
receive the signal from
remote controller.
Also, operation monitor
lamp doesn’t flash, when
the emergency operation
switch is pressed.

Refer to CC“Check of
indoor electric control
P.C. board” on page 31.

Check room temperature.
Refer to“Test point dia­gram and voltage” on
page 32.

10-2-1 troubleshooting check table

❈ Before taking measures make sure that the symptom reappears, for accurate troubleshooting.

Self check table

Abnormal

NO.

1

2

point

Indoor coil
thermistor

Room
tempera­ture ther­mistor

Indoor fan
motor

2-time flash

2.5-second OFF

3-time flash

Indication

2.5-second OFF

Symptom

Outdoor unit
does not run.

Indoor fan
repeats 12 sec­onds ON and 3
minutes OFF.
When the indoor
fan breaks, the
fan keeps stop­ping.

Detect method

Detects Indoor coil/room tem­perature thermistor short or
open circuit every 2 seconds
during operation.

When rotational frequency
feedback signal is not emit
during 12-second indoor fan
operation

● Check thermistor calibretion

● Reconnect connector

● Check indoor borad

● Disconnect connector CN211 and then

check connector CN121 22- 33to make
sure rotational frequency feedback signal
of 1.5V or over exists.

● Check indoor electronic control P.C.
board.

● Check indoor fan motor

● Reconnect conector

Repair

32

BLK

RED

WHT

P

10-2-2 Trouble criterion of main parts

1
2
3

RED

BLK

YLW
GRY
BRN

WHITE

1
2
3

Part name

Room
temperature
thermistor

Indoor coil
thermistor

Compressor

Indoor fan
motor

Check method and criterion

Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)

Normal

8kΩ ~ 20kΩ

Opened or short-circuited

Abnormal

Measure the resistance between the terminals with a tester.
(Coil wiring temperature-10°C ~ 40°C)

Normal

C-R

C-S

MUX-10NV­MUX-18NV-

KH-134VLL

4.1 ~ 5.0Ω

7.2 ~ 8.8Ω

E1

E1

RH-174VGH

2.9 ~ 3.6Ω

5.1 ~ 6.3Ω

MUX-24NV-

RH-231VHA

1.9 ~ 2.3Ω

3.4 ~ 4.2Ω

E1

Abnormal

Opened or

short-circuited

Measure the resistance between the terminals with a tester.
(Coil wiring temperature10°C ~ 30°C)

WHT-BLK

Motor part

BLK-RED

Normal
280 ~ 303Ω
313 ~ 336Ω

Abnormal

Opened or

short-circuited

Measure the voltage Power ON.

BRN-YLW

Sensor part

YLW-GRY

Normal

4.5 ~ 5.5Ω

(When fan revolved one time)

0V➔5V➔0V

(Approx.)

Abnormal

Remain

0V or 5V

Figure

Measure the resistance between the terminals with a tester.
(Coil wiring temperature -10°C ~ 40°C)

Outdoor fan
motor

Solenoid coil

21R, 21RA,

( )

21RB

Solenoid coil

21R1, 21R2,

()

21R3, 21R4

WHT-BLK

BLK-RED
BLK-YLW

YLW-RED

Measure the resistance with a tester. (Part temperature -10°C ~ 40°C)

Measure the resistance with a tester. (Part temperature -10°C ~ 40°C)

Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)

Vane motor

MUX-10NV-

287 ~ 351Ω
347 ~ 424Ω

Normal

602 ~ 749Ω

Normal

1498 ~ 1834Ω

Normal

282 ~ 305Ω

Normal

E1

MUX-18NV-

103 ~ 127Ω

57 ~ 71Ω
43 ~ 54Ω

Abnormal

Opened or short-circuited

Abnormal

Opened or short-circuited

Abnormal

Opened or short-circuited

E1

MUX-24NV-

125 ~ 153Ω

119 ~ 146Ω

E1

Abnormal

Opened or

short-circuited

MUX-10NV

MUX-18NV

BLK

MUX-24NV

P

BLK

REDYLW ORN

RED ORN

P

WHT

WHT

33

A

Check of indoor fan motor

Inodoor fan does not operate.

Are lead wires connected?

Reconnect

lead wires

Disconnect lead wires from connector CN211 on indoor control P.C. board.
Measure resistance between lead wires No.1 and No.3 and then No.2 and No.3.

B

Check of receiver P.C. board

Turn OFF power supply.
Check connector CN211 visually.

Is resistance 0 (short circuit) or ∞ (open circuit)?

Yes ( 0 or ∞ )

Repair indoor fan motor.

NoYesNo

Is soldered point normal?

Yes

Resolder it.

Replace indoor electronic control
P.C. board.

No

(others)

Indoor unit operates by pressing the emergency ON/OFF switch, but does not operate with the remote controller.

Check the model name of remote
controller.

Is.LCD display on remote controller
visible?

Yes

Remove batteries and then set them
back. Check if the unit operates with
remote controller.

Does the unit operate with remote
controller?

Yes

OK

No

(not clear)

No

Replace batteries.(see page 27.)

Turn a radio to AM and press switch on
remote controller.

Is noise heard from radio?

Yes

Are there any fluorescent lights of

inverter or rapid-start type within
the range of 1m?

No

Measure the voltage between control board connector LD101 No.2 and JPG.
when remote controller button is pressed.

No

Yes

Replace remote controller

● Re-install the unit away from lights.

● Attach a filter on receiving part.

34

Is the voltage approx. 4V DC?

No(5V or OV DC)

Replace the receiver

Yes

Replace indoor electronic control
P.C. board.

C

Check

of indoor electronic control P.C. board

The unit doesn’t operate with
the remote controller.
Also, the operation indicator
doesn’t light up by pressing the
emergency ON/OFF switch.

Replace fuse.

Yes

Trouble of indoor elec­tronic control P.C.
board.

No

1.Pull out power supply
cord.

2.Measure resistance
between CN201 on

electronic control
P.C. board and on
the terminal block with
a tester.

No

CN201

11 33

Check both “parts side”and “pattern
side ✻ of indoor electronic control P.C.
board visually

D

Check of outdoor unit

Is fuse(F11)blown?

Be sure to check both fuse
and varistor in any case.

Is varistor(NR11)burnt?

Yes

Replace varistor.

Compressor and outdoor fan do not operate.(Only indoor fan operates.)

Yes

Is there resistance

1

N

L
N

(Approx.0Ω)

No

Trouble of fuse(F12)

Terminal
block

Start

Press EMERGENCY ON/OFF button.
3-minute time delay works.
Test mode operates for 30 minutes.

Check voltage to terminal block of outdoor unit. Is

there 220-240V AC to terminal block between LL-

NN

?

Yes

Check voltage to terminal block of indoor unit. Is

there DC12V to terminal block between 22- 11?

Yes

Check the fuse (F12-F14).Is it cut?

No

Check the outdoor fan motor , compressor , relya ,
and wiring.

No

Check the connection of indoor and outdoor

and the power supply.

No

Check continuity of indoor and outdoor unit connection.

Yes

Replace the fuse.

35

TEST POINT DIAGRAM AND VOLTAGE
MSX-05NV- , MSX-09NV- , MSX-12NV­Indoor electronic control P.C. board

E1E1E1

CN201 No.1

Varistor(NR11)

Fuse AC250V 3.15A

Room temperature
thermistor (RT11)

Indoor coil
thermistor (RT12)

Timer short mode
point

Room temperature thermistor (RT11)
Indoor coil thermistor (RT12)

36

11

DISASSEMBLY INSTRUCTIONS

NOTE:

❈ on the wiring diagram shows the terminals with a lock mechanism, so it

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.

① Slide the sleeve.
➁ Pull the wire while pushing

the locking lever.

11-1 MSX-05NV- , MSX-09NV- , MSX-12NV- INDOOR UNIT

E1E1E1

OPERATING PROCEDURE

1. Removing the front panel.

(1) Remove the screws caps of the front panel.

Remove the screws.

(2) Pull the panel bottom to your side slightly and unhook the

catches at the top.

2. Removing the electronic control P.C. board and the
display P.C. board.

(1) Remove the front panel. (Refer to 1)
(2) Remove the screw of the electrical cover.

Remove the electrical cover.

(3) Disconnect the room temperature thermistor and the con-

nector from the indoor coil thermistor.

(4) Remove the terminal cover.

Remove the screw of the terminal block.

(5) Disconnect all the connectors on the electronic control P.C.

board.

(6) Disconnect the white lead wire and the black lead wire from

52C relay.

(7) Remove the electronic control P.C. board and the display

P.C. board.

Photo 1

Front panel

Screw

Photo 2

PHOTOS

Room temperature
thermistor connector

Indoor electronic
control P.C.
board

Terminal block
cover

Terminal block
cover screw

37

OPERATING PROCEDURE PHOTOS

3. Removing the electrical box.

(1) Remove the front panel. (Refer to 1)
(2) Remove the electrical cover.
(3) Disconnect the connector of the indoor coil thermistor.
(4) Disconnect the motor connector (CN211) and the vane

motor connector (CN151) on the electronic control P.C.
board.

(5) Unhook the catches (both upper and lower), remove the

electronic box.

4. Removing the vane motor.

(1) Remove the front panel.(Refer to 1)
(2) Remove the screw of the vane motor, disconnect the con-

nector.

(3) Remove the vane motor.

5. Removing the line flow fan and the indoor fan
motor.

(1) Remove the front panel. (Refer to 1)
(2) Disconnect the connector from the vane motor.
(3) Pull out the drain hose from the nozzle assembly, remove

the nozzle assembly.

(4) Lifting the left side of the heat exchanger, remove the elec-

trical box.
(5) Remove the fixture of the fan motor.
(6) Remove the line flow fan and the fan motor.

Photo 3

Photo 4

Vane motor screw

Drain hose

Vane motor

38

Fan motor
catches

Fan motor
fixture

Indoor coil
termistor

11-2 MUX-10NV - OUTDOOR UNIT

E1

OPERATING PROCEDURE PHOTOS

1. Removing the cabinet.

(1) Remove the screws fixing the service panel.
(2) Remove the screw fixing the side panel.
(3) Remove the service panel.
(4) Remove the side panel.
(5) Remove the cabinet.

Photo 1

Screws

Photo 2

Cabinet

Service

panel

Screws

2. Removing the propeller.

(1) Remove the cabinet.
(2) Remove the propeller nut.
(3) Remove the propeller.

Note : Loosen the propeller in the rotating direction for removal.

When setting the propeller, align the motor-shaft cut
section.

3. Removing the outdoor fan motor.

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the propeller.(Refer to 2.)
(3) Remove the lead clamps and disconnect the outdoor fan

motor connector.
(4) Remove outdoor fan motor set screws.
(5) Remove the outdoor fan motor.

Photo 3

Propeller

Propeller

Photo 4

Outdoor fan motor

Outdoor fan motor
set screws

39

OPERATING PROCEDURE PHOTOS

4. Removing the compressor.

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the terminal cover.

(3) Pull out lead from the compressor terminal, then remove

the thermal protector.

(4) Remove the suction pipe welded section and discharge

pipe welded section using a burner.

Pull out when the welding melts.
(5) Remove the sound proof felt.
(6) Remove the compressor 3 set nuts.
(7) Remove the compressor.

Note :

● Before using the welder, confirm that the pressure gauge is
0 kg/cm

● When using the welder, leave the service port open and release
the pressure to avoid expansion by heat.

2

.

Photo 5

Discharge

pipe

Suction

pipe

Sound proof felt

40

11-3 MUX-18NV - OUTDOOR UNIT

E1

OPERATING PROCEDURE PHOTOS

1.Removing the cabinet.

(1) Remove the screws fixing the service panel.
(2) Remove the screw fixing the side panel.
(3) Remove the service panel.
(4) Remove the side panel.
(5) Remove the cabinet.

Photo 1

Side
panel

Side panel
set screw

Cabinet

Service panel

Service panel
set screw

2. Removing the propeller.

(1) Remove the cabinet.
(2) Remove the propeller nut.
(3) Remove the propeller.

Note: Loosen the propeller in the rotating direction for removal.

When setting the propeller, align the motor-shaft cut sec­tion.

3.Removing the outdoor fan motor.

(1) Remove the cabinet.(Refer to 1.)
(2) Remove the propeller.(Refer to 2.)
(3) Remove the lead clamps and disconnect the outdoor fan

motor connector.
(4) Remove outdoor fan motor set screws.
(5) Remove the outdoor fan motor.

Photo 2

Photo 3

Propeller

Propeller nut

Fan motor

Outdoor fan motor
set screws

41

OPERATING PROCEDURE

4. Removing the compressor.

(1) Remove the cabinet.(Refer to 1.)
(2) Remove the terminal cover.
(3) Pull out lead from the compressor terminal,then remove

the terminal overcurrent relay.

(4) Remove the suction pipe welded section and discharge

pipe welded section using a burner.

Pull out when the welding melts.
(5) Remove the sound proof felt.
(6) Remove the compressor 3 set nuts.
(7) Remove the compressor.

NOTE:

● Before using the welder, confirm that the pressure gauge is

0 Kg/cm

● When using the welder, leave the service port open and

release the pressure to avoid expansion by heat.

2

.

PHOTOS

Photo 4

Suction pipe

5. Removing the compressor.

(1) Remove the cabinet.(Refer to 1.)
(2) Remove the terminal cover.
(3) Pull out lead from the compressor terminal,then remove

the terminal overcurrent relay.
(4) Remove the screws fixing the back panel.
(5) Remove the suction pipe welded section and discharge

pipe welded section using a burner.

Pull out when the welding melts.
(6) Remove the sound proof felt.
(7) Remove the compressor 3 set nuts.
(8) Remove the compressor.

Discharge pipe

Sound proof felt

42

11-4 MUX-24NV- OUTDOOR UNIT

E1

OPERATING PROCEDURE PHOTOS

1.Removing the cabinet.

(1) Remove the screws fixing the service panel.
(2) Remove the screw fixing the top panel.
(3) Remove the service panel.
(4) Remove the top panel.
(5) Remove the screws fixing the front panel.
(6) Remove the front panel.
(7) Remove the screws fixing the outer nozzle.
(8) Remove the outer nozzle.

Photo 1

Screws

Front panel

Top panel

Service panel

set

screws

Photo 2

Rear panel

Rear panel
set
screws

Photo 3

Top panel

set screws

Screws Screws

43

OPERATING PROCEDURE PHOTOS

2. Removing the relay panel.

(1) Remove the cabinet. (Refer to 1)
(2) Disconnect the following connectors.

.

Compressor (MC1,MC2)

.

Outdoor fan motor

.

Solenoid coil (21R1,21R2,21R3,21R4,21RA,21RB)

3. Removing the propeller.

(1) Remove the cabinet.
(2) Remove the propeller nut.
(3) Remove the propeller.

Note : Loosen the propeller in the rotating direction for removal.

When setting the propeller, align the motor-shaft cut
section.

Photo 4

Compressor connector
(MC1,MC2)

Photo 5

Solenoid coil connector
(21RA,21RB)

Screws

Solenoid coil connector
(21R1,21R2,21R3,21R4)

4. Removing the outdoor fan motor.

(1) Remove the cabinet. (Refer to 1)
(2) Remove the propeller. (Refer to 3)
(3) Disconnect the connector remove the clamp of outdoor fan

motor lead wire.

(4) Remove the screws fixing the outdoor fan motor.

44

Propeller

Propeller nut

Photo 6

Clamp

Outdoor
fan
motor

Outdoor fan motor
set screws

OPERATING PROCEDURE PHOTOS

5. Removing the compressor. (A,B)

(1) Remove the cabinet. (Refer to 1)
(2) Remove the relay panel. (Refer to 2)
(3) Remove the terminal cover.
(4) Pull out lead from the compressor.
(5) Remove the suction pipe welded section and discharge

pipe welded section using a burner. Pull out when the

welding melts.
(6) Remove the sound proof felt.
(7) Remove the compressor set nuts.
(8) Remove the compressor.

6. Removing the compressor. (C,D)

(1) Remove the cabinet. (Refer to 1)
(2) Remove the relay panel. (Refer to 2)
(3) Remove the screws fixing rear panel. (Refer to photo 2)
(4) Remove the rear panel.
(5) Remove the terminal cover.
(6) Pull out lead from the compressor.
(7) Remove the suction pipe welded section and discharge

pipe welded section using a burner. Pull out when the

welding melts.
(8) Remove the sound proof felt.
(9) Remove the compressor set nuts.

(10) Remove the compressor.

Photo 7

Terminal cover

Sound proof felt Suction pipe Discharge pipe

45

12

No.

Parts No. Parts Name Remarks

MSX-12NV-

E1

(WH)

Symbol

in Wiring

Diagram

1

2
3

4

5
6

E02 154 000
E02 157 000
E02 151 010
E02 164 100
E02 151 234
E02 160 234
E02 151 970
E02 151 970

FRONT PANEL
FRONT PANEL
GRILLE
AIR FILTER
BOX
BOX
INSTALLATION PLATE
SCREW CAP

1
1
2

1
1
2

MSX-05/09NV-

E1

(WH)

1

1
2
1

1
2

1PC/SET

2PCS/SET

Q'ty / unit

PARTS LIST

INDOOR UNIT
STRUCTURAL PARTS
MSX-05NV - (WH)
MSX-09NV - (WH)
MSX-12NV - (WH)

6

E1
E1
E1

1

5

4

2

Optional parts

3

46

INDOOR UNIT

No.

Parts No. Parts Name Remarks

Q'ty / unit

MSX-05/09NV-

E1

(WH)

MSX-12NV-

E1

(WH)

Symbol

in Wiring

Diagram

Part number that are circled not shown in the figure.

1

2
3
4
5
6
7
8

9
10
11

12

13
14
15
16
17
18
19

E02 199 235
E02 166 235
E02 166 040
E02 141 702
E02 151 303
E02 151 300
E02 151 505
E02 151 302
E02 151 509
E02 151 308
E02 151 307
E02 211 375
E02 211 450
E02 281 450
E02 152 395
E02 127 382
E02 164 081
E02 151 350
E02 085 385
E02 001 504
E02 199 520

NOZZLE(WH)
NOZZLE(WH)
VANE(WH)
DRAIN HOSE
VANE MOTOR
INDOOR FAN MOTOR
RUBBER MOUNT
LINE FLOW FAN
BEARING MOUNT
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
TERMINAL BLOCK
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
POWER SUPPLY CORD
FUSE
ELECTRICAL BOX
INDOOR FAN CAPACITOR
VARISTOR
SLEEVE BEARING
FAN GUARD

1

1
1
1
1
2
1
1
1
1
1
1

1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1

RC4V19 ­2PES/SET

3.15A

1.5µF/440VAC

MV

MF

RT11
RT12

TB

F11

C11

NR11

ELECTRICAL PARTS
MSX-05NV - (WH)
MSX-09NV - (WH)
MSX-12NV - (WH)

E1
E1
E1

8

18

3

9

10

15

7

11

6

5

1

2

4

13

12

47

No.

Parts No. Parts Name Remarks

MSX-05/09NV-

E1

(WH)

Symbol

in Wiring

Diagram

Q'ty / unit

1

2

3

E02 151 620
E02 151 666
E02 155 666
E02 151 667

INDOOR HEAT EXCHANGER
UNION(GAS)
UNION(GAS)
UNION(LIQUID)

1
1

1

{ 9.52
{ 12.7
{ 6.35

MSX-12NV-

E1

(WH)

1

1
1

INDOOR UNIT

HEAT EXCHANGER

MSX-05NV - (WH)

MSX-09NV - (WH)

MSX-12NV - (WH)

E1
E1
E1

1

48

3

2

REMOTE CONTROLLER & ACCESSORY PARTS
MSX-05NV - (WH)
MSX-09NV - (WH)
MSX-12NV - (WH)

E1
E1
E1

2

1

No.

Parts No. Parts Name Remarks

12E02 138 426

E02 141 083

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

Symbol

in Wiring

Diagram

Q'ty / unit

MSX-05/09/12NV-

(WH)

1
1

E1

49

OUTDOOR UNIT

FUNCTIONAL PARTS AND ELECTRICAL PARTS

MUX-10NV -

E1

3

4

2

1

5

8

6

9

10

7

Part number that are circled not shown in the figure.

No.

10
11
12
13
14

Parts No. Parts Name Remarks

M21 601 501

1

T2W E42 301

2

T2W E42 388

3

T2W E39 389

4

T2W E42 389

5

T2W E42 374

6

M21 370 378

7

T2W 459 342

8

M21 N71 350

9

T2W 304 353
T2W E03 330
M21 B00 340
T2W E42 375
T2W A79 382

PROPELLER
OUTDOOR FAN MOTOR
BYPASS VALVE SOLENOID COIL A
BYPASS VALVE SOLENOID COIL B
BYPASS VALVE SOLENOID COIL
TERMINAL BLOCK
TERMINAL BLOCK
COMPRESSOR CONTACTOR
FAN MOTOR CAPACITOR
COMPRESSOR CAPACITOR
OVERCURRENT RELAY
RELAY
TERMINAL BLOCK
FUSE

Symbol

in Wiring

Diagram

MF
21R1
21R2

21R

TB
TB

52C1,52C2

C2
C1

51C

TB

F12,F13

Q'ty / unit

MUX-10NV-

1
1
1
1
1
1
2
2
1
1
1
2
1
2

E1

RA6V22-

L N

1.5+440V
17+440V

G4F11123T
2,1,2,1
2A 250V

50

OUTDOOR UNIT
STRUCTURAL PARTS
MUX-10NV -

E1

5

6

7

4

3

2

14

1

15

13

8

9

10

11

12

Symbol

No.

10
11
12
13
14
15

When servicing , cut the tube to the propper length as shown in the REFRIGERANT SYSTEM DIAGRAM.
See page 14.

Parts No. Parts Name Remarks

T2W 418 521

1

T2W E03 232

2

M21 478 297

3

T2W 459 630

4

T2W 416 515

5

T2W E03 293

6

M21 179 645

7

M21 463 936

8

M21 195 648

9

T2W E03 936
T2W E42 662
T2W E42 661
T2W E03 290

T92 514 200

T2W E03 245

OUTER NOZZLE
CABINET
TOP PANEL
OUTDOOR HEAT EXCHANGER
MOTOR SUPPORT
SEPARATOR
SOLENOID VALVE
CAPILLARY TUBE
SOLENOID VALVE
CAPILLARY TUBE
STOP VALVE(LIQUID)
STOP VALVE
BASE ASSEMBLY
COMPRESSOR
SERVICE PANEL

in Wiring

Diagram

Q'ty / unit

MUX-10NV-

1
1
1
1
1
1
2
1
1
1
2
2
1
1
1

E1

[3.0x[1.4x1900

KH-134VLLMC

51

OUTDOOR UNIT
MUX-18NV -

E1

2

27

17

16

8

11

28

7

6

5

12

10

29
15

1

9

14
13

18
19

3

24
25
24

25
20

21
22

23

32

26

36

3130

4

52

Part number that are circled not shown in the figure.

No.

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

Parts No. Parts Name Remarks

T2W 510 232

1

T2W 667 249

2

T2W 466 509

3

M21 K59 245

4

T2W E41 291

5

T2W E42 375

6

T2W E42 374

7

T2W 304 353

8

M21 W16 350

9

T2W 813 342
T2W 459 342
M21 B19 515
T2W A23 490
T2W E41 489
T2W E41 488
T2W A73 301

R01 093 115
M21 179 645
M21 195 648

M21 K59 662
M21 K59 661
T2W 689 665
T2W 689 667

M21 L01 666
M21 SJ4 667

T92 514 200
T2W A74 630

M21 987 936
M21 463 936
M21 463 936
M21 463 936

T2W E03 330
T2W E41 374

M21 370 378

M21 B00 340
T2W E06 290
T2W A79 382

CABINET
SIDE PANEL
OUTER NOZZLE
SERVICE PANEL
BACK PANEL
OUTDOOR TERMINAL BLOCK
TERMINAL BLOCK
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
OUTDOOR FAN RELAY
CONTACTOR
MOTOR SUPPORT
SOLENOID COIL
SOLENOID COIL(B)
SOLENOID COIL(C)
OUTDOOR FAN MOTOR
PROPELLER
SOLENOID VALVE
SOLENOID VALVE
STOP VALVE(LIQUID)
STOP VALVE(GAS)
STOP VALVE(LIQUID)
STOP VALVE(GAS)
UNION(1/4)
UNION(3/8)
COMPRESSOR
OUTDOOR HEAT EXCHANGER
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
OVERCURRENT RELAY
TERMINAL BLOCK
TERMINAL BLOCK
RELAY
BASE
FUSE

Symbol

in Wiring

Diagram

TB2

TB

C1,2

C3

X11,X12

52C1,52C2

21R
21R1
21R2

MF

MC1,MC2

51C1,51C2

TB3

X1,X2,52CA

F12,F13,F14

Q'ty / set

MUX-18NV-

1
1
1
1
1
1
1
2
1
2
2
1
1
1
1
1
1
2
1
1
1
1
1
2
2
2
1
1
1
1
1
2
1
2
3
1
3

E1

17µF 440V
3µF 440V
LY-2F

RA6V50 -

KH-134VLL

[3.0X[1.6X3,200(mm)
[3.0X[1.4X1,900(mm)
[3.0X[1.4X1,900(mm)
[3.0X[1.4X1,900(mm)

G4F11123T

2A 250V

When servicing , cut the tube to the propper length as shown in the REFRIGERANT SYSTEM DIAGRAM.
See page 15.

53

OUTDOOR UNIT
MUX-24NV -

E1

28

23

38

29

22

32

31

25

27

26

4

8

10

1

2

34

24

303733

5

35

36

6

17

7

54

19

18

14

3

13

11

20

21

15

12

9

16

Part number that is circled is not shown in the figure.

No.

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

32

33
34
35

36

37
38

Parts No. Parts Name Remarks

T2W E44 232

1

T2W E44 521

2

T2W E44 245

3

T2W E44 249

4

T2W E44 297

5

T2W E44 523

6

T2W E44 248

7

T2W E44 630

8

T2W E44 290

9

M21 51E 515

T92 702 600

T92 531 600
M21 179 645
M21 21J 662

M21 00L 661

M21 00A 661
T2W E44 648
T2W E44 641
T2W E44 643
T2W E44 642
T2W E44 644
T2W E44 301

M21 17A 501
T2W E44 388
T2W E44 389
T2W E38 388
T2W E38 389
T2W E37 388
T2W E37 389

T2W 813 342

M21 B00 340

T2W 459 342

T2W E06 353
T2W A62 353
T2W E44 374

T2W E44 375

T2W E08 381

T2W 779 353

FRONT PANEL
OUTER NOZZLE
SERVICE PANEL
SIDE PANEL
TOP PANEL
REAR GUARD
REAR PANEL
HEAT EXCHANGER
BASE
MOTOR SUPPORT
COMPRESSOR(A,B)
COMPRESSOR(C,D)
SOLENOID VALVE(A,B)
STOP VALVE(LIQUID)
STOP VALVE
STOP VALVE
SOLENOID VALVE
PIPE A S. V
S. V HEADER A
PIPE B S. V
S. V HEADER B
FAN MOTOR
PROPELLER FAN
SOLENOID COIL
SOLENOID COIL
SOLENOID COIL
SOLENOID COIL
SOLENOID COIL
SOLENOID COIL
FAN MOTOR RELAY
RELAY

COMPRESSOR RELAY

FAN MOTOR CAPACITOR
COMPRESSOR CAPACITOR
TERMINAL BLOCK

TERMINAL BLOCK

FUSE
COMPRESSOR CAPACITOR

Symbol

in Wiring

MC2
MC1

MF

21R1
21R2
21R3
21R4
21RA
21RB

X11,X12

X1,X2,X3,X4

52C1,52C2
52C3,52C4

C1

TB
TB1,TB2
TB3,TB4

C2

Q'ty / unit

MUX-24NV-

1
1
1
1
1
1
1
1
1
1
1
1
4
4
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
4

4

1
1
1

4

1
1

E1

RH-174VGH
RH-231VHA

LIQUID

LY-2F
G4F11123T-MT

AC200/240V

3=/440V
30=/420V

3.15A 250V
25=/420V

55

13

OPTIONAL PARTS

1. REFRIGERANT PIPES

Please use the optional extension pipe as follows.
The following models have flared connections on its indoor and outdoor sides.

Pipe Size O.D. mm(in.)

[9.52

(3/8)

[12.7

(1/2)

[6.35

(1/4)

[27 [21

[31 [27

Applied unit

MSX-05NV­MSX-09NV-

MSX-12NV-

Models

MAC-440PI
MAC-441PI
MAC-442PI
MAC-443PI

MAC-660PI
MAC-661PI
MAC-662PI
MAC-663PI
MAC-664PI

Pipe

length

3m
5m
7m

10m

3m
5m

7m
10m
15m

Crosssection A - Gas B - Liquid C - Insulation D - Insulation

2. AIR CLEANING FILTER

● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity.

● Normal life of AIR CLEANING FILTER is 3 months. However, when it becomes dirty, replace it as soon as possible.

● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet.

● DO NOT reuse AIR CLEANING FILTER even if it is washed.

● DO NOT remove or attach AIR CLEANING FILTER during unit operation.

Model Part NO.
MSX - 05NV­MSX - 09NV- MAC-1000FT
MSX - 12NV-

E1
E1
E1

E1
E1

E1

3. DEODORIZING FILTER

● DEODORIZING FILTER removes ammonia and hydrogen sulfide emitted from tobacco, and odors of pets.

● Clean DEODORIZING FILTER every two weeks. If the filter is particularly dirty, clean the filter more often.

● For cleaning, soak the filter in warm water for a while, and then wash and rinse it. Dry the filter in the shade thoroughly.

● When the filter color is still dark even after cleaning, replace the filter with a new one.

Replace the filter at least once a year.

Part No. Model

MAC-1500DF MSX - 05NV- , MSX - 09NV- , MSX - 12NV-

● DEODORIZING FILTER and AIR CLEANING FILTER can be attechednon either side.

HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYO

Issued in Apr. 1997.MEE NO. OB183 SECOND EDITION 1902
Issued in Jan. 1997.MEE NO. OB183 1902
Printed in Japan

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