Mitsumi electronic MS09NW-WH, MS15NN-WH, MS12NN-WH, MS17NN-WH, MU09NW User Manual

SPLIT-TYPE AIR CONDITIONERS

L

I

S

T

E

D

R

SERVICE MANUAL

Wireless type
Models

No. OB192

MS12NN
MS15NN
MS17NN
INDOOR UNIT

MS09NW
MS12NN
MS15NN
MS17NN

Remote
controller

(WH)
(WH)
(WH)
(WH)

· MU09NW

· MU12NN

· MU15NN

· MU17NN

CONTENTS

1. FEATURES·························································3

2. TECHNICAL CHANGES ····································4

3. PART NAMES AND FUNCTIONS······················4

4. SPECIFICATIONS ··············································6

5. DATA···································································9

6. OUTLINES AND DIMENSIONS·······················17

7. WIRING DIAGRAM ··········································19

8. REFRIGERANT SYSTEM DIAGRAM··············21

9. MICROPROCESSOR CONTROL ····················22

10. SERVICE FUNCTIONS·····································30

11. TROUBLESHOOTING ······································31

12. DISASSEMBLY INSTRUCTIONS·····················39

13. PARTS LIST······················································47

14. OPTIONAL PARTS ···········································55

The Slim Line.
From Mitsubishi Electric.

MU12NN
MU15NN
MU17NN
OUTDOOR UNIT

Refer to our Service Manual OB202 when the indoor unit is used in the multi-system operation.
Applied models are MS09NW and MS15NN.

1

SWING

1013/16

FEATURES

LCD wireless

MS12NN, MS15NN, MS17NN MU12NN, MU15NN, MU17NN

remote controller

Models Cooling capacity SEER

MS09NW 8,500Btu/h 10.2
MS12NN 12,300/12,600Btu/h 11.3/11.3
MS15NN 14,300/14,600Btu/h 10.5/10.5
MS17NN 15,900/16,100Btu/h 10.2/10.2

NEW “I FEEL CONTROL” IN OUR LCD WIRELESS REMOTE CONTROLLER WITH ON/OFF PROGRAM
TIMER

Mitsubishi Electric’s new wireless remote controller incorporates a number of advanced features that provide even greater con-

trol and ease-to- use. It has a liquid crystal display which indicates such infomation as mode, fan speed and temperature
selected as well as the programmed ON/OFF time. It is also equipped with “I Feel Control”, a unique Mitsubishi Electric feature
that allows the user to adjust the temperature to exactly the level he or she wants simply by tapping the button that describes
present conditions : “Too Cool” or “Too Warm”. The optimum temperature set this way is then memorized for immediate recall
whenever the air conditioner is used again. And what’s more, the new controller has been made more redesigned and easier
to handle than before.

Select desired air flow direction.
REMOTE-CONTROL OPERATION MODE

Using the remote controller, you can select from five airflow set-

tings to match room layout and the location of people. Also, you
can set the vane to swing automatically.

Small in size, big on cooling.
COMPACT INDOOR UNIT

The sleek design of the NW/NN Series matches virtually any room

13

16

layout. For instance, MS09NW is 10

3

which used to be 14

16

/

o 311/8 o 53/8.

/

16

o 321/

o 73/16(Ho Wo D),

AUTO-RESTART FUNCTION

The auto restart function restarts the equipment when power is

restored following an outage automatically. Operation resumes in
the mode in which the equipment was running immediately before
the outage.

HIGH PERFORMANCE ROTARY COMPRESSOR

The advanced design of Mitsubishi Electric’s powerful and energy-

efficient rotary compressor results in lower operating costs and
longer service life.

MS09NW

3

2

TECHNICAL CHANGES

MS09EW ➔ MS09NW

1. Indoor unit has changed.
(Outline dimension changes. 31-1/8”o5-3/8”o14-3/16”(WoDoH)

2. Outdoor unit has changed.
(Outline dimension changes. 29-15/16”o9-1/16”o21-1/4”(WoDoH)➔30-11/16”o10-1/16”o21-1/4”(WoDoH))
(Capillary tube, refrigerant and pipe had changed.)

3. Remote controller has changed. (The timer function was changed to the clock timer function.)

4. Indoor auto vane has been adopted.

➔32-1/16”o7-3/16”o10-13/16(WoDoH)

MS12EN, MS15EN ➔ MS12NN, MS15NN

1. Indoor unit has changed.
(Outline dimension changes. 39-3/8”o7”o14-3/16”(WoDoH)➔39-15/16”o7-1/2”o12-5/8”(WoDoH))

2. Outdoor unit has changed.
(Outline dimension changes. 33-1/2”o11-7/16”o23-7/8”(WoDoH)➔33-7/16”o11-7/16”o23-13/16”(WoDoH))
(Capillary tube, refrigerant and pipe had changed.)

3. Remote controller has changed. (The timer function was changed to the clock timer function.)

4. The swing mode was addedd to indoor auto vane.

MS17NN

1. New Model

3

PART NAMES AND FUNCTIONS

MS09NW, MS12NN, MS15NN, MS17NN

REMOTE CONTROLLER

4

INDOOR UNIT

Operation section

MS12NN

Emergency operation switch

Emergency operation switch

MS09NW

(When the front panel is opened)

MS09NW

MS12NN
MS15NN
MS17NN

MS09NW

MS12NN, MS15NN, MS17NN

OUTDOOR UNIT

MU09NW

MS12NN, MS15NN, MS17NN

MU12NN
MU15NN
MU17NN

5

4

ITEM MODELS MS09NW MS12NN

Cooling capacity
Power consumption
EER [SEER]
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. ampacity
Fan motor

Airflow Lo—Me—Hi
Moisture removal

Sound level Lo-Me-Hi
Cond. drain connection O.D.

Dimensions
Weight

OUTDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. ampacity
Fan motor

Compressor

Refrigerant control
Sound level

Dimensions
Weight

REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING

Pipe size
Connection method

Between the indoor
& outdoor units

w1
w1
w1

Dry
Wet

W
D
H

Model
Winding resistance (at 68˚F) ½

W
D
H

Liquid
Gas
Indoor
Outdoor
Height difference
Piping length

Btu/h

W

V, phase, Hz

A
A

F.L.A

CFM
CFM

Pints/h

dB(A)

in.
in.
in.
in.

lbs

V, phase, Hz

A
A

F.L.A

R.L.A
L.R.A

dB(A)

in.
in.
in.

lbs

in.
in.

ft
ft

8,500

840

10.1 (10.2)
MS09NW

0.5

0.37
208-265-328
177-226-279

2.3

31-37-42

32-1/16

7-3/16

10-13/16

18

MU09NW

115, 1, 60

14

0.66

KH122WES

C-R 0.98 C-S 2.21

10
37

46

30-11/16

10-1/16

21-1/4

64

3/8

White

115, 1, 60

15

5/8

Munsell 5Y6.5/1

15

Capillary tube

Wireless type

12V DC

Not supplied (optional parts)

1/4

Flared

Flared
Max. 25
Max. 49

12,300/12,600

1,100/1,130

11.2/11.2 (11.3/11.3)
MS12NN

0.6

0.43
360-395-452
314-342-392

3.2

36-39-42
39-15/16

7-1/2

12-5/8

31

MU12NN

208/230, 1, 60

12

0.52

RH167NHDT

C-R 2.16 C-S 3.11

9

29

52
33-7/16
11/7/16

23-13/16

92

5/8

Cooling

Maximum

Minimum

Indoor intake air temperature

95˚FDB, 71˚FWB
67˚FDB, 57˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB

When MS09NW indoor unit is operating with MUM18NW and MUM30NN outdoor unit connected.
(Please refer to the manual No.OB202 for MUM18NW and MUM30NN.)

Notes w1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, 75˚FWB

Operating Range

6

SPECIFICATIONS

ITEM MODELS MS15NN MS17NN

Cooling capacity 
Power consumption 
EER [SEER]
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. ampacity
Fan motor

Airflow Lo—Me—Hi
Moisture removal

Sound level Lo-Me-Hi
Cond. drain connection O.D.

Dimensions
Weight

OUTDOOR UNIT
External finish
Power supply
Max. fuse size (time delay)
Min. ampacity
Fan motor

Compressor

Refrigerant control
Sound level

Dimensions
Weight

REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING

Pipe size
Connection method

Between the indoor
& outdoor units

w1
w1
w1

Dry
Wet

W
D
H

Model
Winding resistance (at 68˚F) ½

W
D
H

Liquid
Gas
Indoor
Outdoor
Height difference
Piping length

Btu/h

W

V, phase, Hz

A
A

F.L.A

CFM
CFM

Pints/h

dB(A)

in.
in.
in.
in.

lbs

V, phase, Hz

A
A

F.L.A

R.L.A
L.R.A

dB(A)

in.
in.
in.

lbs

in.
in.

ft
ft

14,300/14,600

1,370/1,400

10.4/10.4 (10.5/10.5)
MS15NN

0.6

0.43
360-395-452
293-321-367

4.7

36-39-42

MU15NN

14

RH207NHDT

C-R 1.68 C-S 2.78

10
35

52

92

White

115, 1, 60

15

5/8

39-15/16

7-1/2

12-5/8

31

Munsell 5Y6.5/1

208/230, 1, 60

20

0.52

Capillary tube

33-7/16
11-7/16

23-13/16

Wireless type

12V DC

Not supplied (optional parts)

1/4

5/8
Flared
Flared

Max. 25
Max. 49

15,900/16,100

1,570/1,600

10.1/10.1 (10.2/10.2)
MS17NN

0.7

0.51
406-441-491
346-374-417

5.1

40-43-45

MU17NN

15

RH231NHDT

C-R 1.65 C-S 2.67

11
38

52

97

Cooling

Maximum

Minimum

Indoor intake air temperature

95˚FDB, 71˚FWB
67˚FDB, 57˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB

When MS15NN indoor unit is operating with MUM30NN outdoor unit connected.
(Please refer to the manual No.OB202 for MUM30NN.)

Notes w1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, 75˚FWB

Operating Range

7

25

Models

MS09NW

MS12NN
MS15NN
MS17NN

Additional piping

Max. length : ft

A

49

Gas

[ 3/8



[ 5/8

Piping size O.D. : in. Length of connecting pipe : in.

Liquid



[ 1/4

Indoor unit

16-15/16

Outdoor unit

0

MAX. REFRIGERANT PIPING LENGTH

MAX. HEIGHT DIFFERENCE

8

5

Models

Indoor air Outdoor intake air DB temperature(˚F

)

MS09NW

71
67
63
71
67
63
71
67
63
71
67
63

TC

10.4

9.9

9.3

15.4

14.6

13.7

17.9

16.9

15.9

19.7

18.7

17.5

SHC

5.9

6.9

7.7

11.6

10.4

8.9

9.2

11.0

12.5

10.2

12.1

13.7

TPC

0.75

0.71

0.67

1.01

0.95

0.90

1.25

1.18

1.12

1.42

1.34

1.28

TC

9.7

9.2

8.6

14.4

13.6

12.7

16.7

15.8

14.7

18.4

17.4

16.3

SHC

5.5

6.4

7.2

8.3

9.7

10.7

8.6

10.2

11.6

9.5

11.3

12.7

TPC

0.82

0.78

0.74

1.10

1.05

1.00

1.37

1.30

1.24

1.56

1.48

1.42

TC

9.1

8.5

8.0

13.5

12.6

11.8

15.7

14.6

13.7

17.3

16.1

15.1

SHC

5.2

6.0

6.7

7.8

8.9

10.0

8.1

9.5

10.8

8.9

10.5

11.9

TPC

0.88

0.84

0.80

1.19

1.13

1.08

1.47

1.40

1.34

1.68

1.60

1.53

TC

8.5

7.9

7.3

12.6

11.7

10.8

14.6

13.6

12.5

16.1

15.0

13.8

SHC

4.8

5.5

6.1

7.3

8.3

9.1

7.5

8.8

9.8

8.3

9.7

10.8

TPC

0.93

0.89

0.86

1.25

1.20

1.15

1.55

1.48

1.43

1.77

1.70

1.63

TC

7.8

7.3

6.6

11.6

10.8

9.8

13.4

12.5

11.4

14.8

13.8

12.6

SHC

4.4

5.1

5.5

6.7

7.6

8.3

6.9

8.1

8.9

7.7

8.9

9.8

TPC

0.97

0.93

0.89

1.30

1.25

1.20

1.61

1.55

1.48

1.84

1.78

1.70

IWB

(˚F)

75 85 95 105 115

MS12NN

MS15NN

MS17NN

Notes 1. IWB : Intake air wet-bulb temperature.
TC : Total Capacity (x10

3

Btu/h), SHC : Sensible Heat Capacity (x10

3

Btu/h)

TPC : Total Power Consumption (kW)

2. SHC is based on 80˚F of indoor intake air DB temperature.

Models

Refrigerant piping length (one way)

MS09NW

MS12NN
MS15NN
MS17NN

1.0

1.0

1.0

1.0

25ft (std)

0.954

0.954

0.954

0.954

40ft

0.927

0.927

0.927

0.927

49ft

DATA

MS09NW, MS12NN, MS15NN, MS17NN

1. PERFORMANCE DATA

1) COOLING CAPACITY

2) COOLING CAPACITY CORRECTIONS

9

2. PERFORMANCE CURVE

71
67
63

71
67
63

71
67

63

71
67
63

Total power consumption (kW) Total capacity ( o10 Bw/h)

Outdoor intake air DB temperature (¡F) Outdoor intake air DB temperature (¡F)

Indoor intake air WB temperature (

¡

F)

Indoor intake air WB temperature (¡

F)

Indoor intake air WB temperature (¡F)

Indoor intake air WB temperature (¡F)

Cooling capacity

SHF at rating condition = 0.7

= 279CFM
= 0.26

Airflow

Bypass Factor

Cooling capacity

SHF at rating condition = 0.71

= 392CFM
= 0.17

Airflow

Bypass Factor

12

10

8

6

1.2

65 75 85 95 105 115 67 75 85 95 105 115

0.8

0.6

Total power consumption (kW) Total capacity ( o10 Bw/h)

16

14

12

10

8

2

1

71
67
63

71
67
63

71
67
63

71
67

63

Indoor intake air WB temperature (

¡

F)

Indoor intake air WB temperature (

¡

F)

Cooling capacity

SHF at rating condition = 0.7

= 367CFM
= 0.22

Airflow

Bypass Factor

67 75 85 95 105 115

Total power consumption (kW) Total capacity ( o10 Bw/h)

18

16

14

12

2

1

Outdoor intake air DB temperature (¡F)

Indoor intake air WB temperature (

¡

F)

Indoor intake air WB temperature (

¡

F)

Cooling capacity

SHF at rating condition = 0.65

= 417CFM
= 0.24

Airflow

Bypass Factor

67 75 85 95 105 115

Total power consumption (kW) Total capacity ( o10 Bw/h)

20

18

16

14

2

1

Outdoor intake air DB temperature (¡F)

NOTE : Apoint on the curve shows the reference point.

MS09NW MS12NN
MU09NW MU12NN

MS15NN MS17NN
MU15NN MU17NN

10

3. CONDENSING PRESSURE AND SUCTION PRESSURE

86 F
80

75
70

86 F

80
75
70

300

(PSIG)

280

260

240

220

200

180
170

68 70 75 80 85 90 95 100 104 F

Condensing pressure

Outdoor ambient temperature

Indoor DB temperature

Indoor DB temperature

(PSIG)

40

50

60

70

80

90

68 70 75 80 85 90 95 100 104 F

Suction pressure

Outdoor ambient temperature

Data is based on the condition of indoor humidity 50%. Air flow should be set at Hi. Apoint on the curve shows
the reference point

MU09NW

MU09NW

11

Data is based on the condition of indoor humidity 50%. Air flow should be set at Hi. Apoint on the curve shows

86 F
80
75

70

86 F

80
75
70

300

(PSIG)

280

260

240

220

200

180

160

68 70 75 80 85 90 95 100 104 F

Condensing pressure

Outdoor ambient temperature

Indoor DB temperature

Indoor DB temperature

(PSIG)

40

50

60

70

80

90

68 70 75 80 85 90 95 100 104 F

Suction pressure

Outdoor ambient temperature

the reference point

MU12NN

MU12NN

12

Data is based on the condition of indoor humidity 50%. Air flow should be set at Hi. Apoint on the curve shows
the reference point

MU15NN

(PSIG)

320

300

86 F

280

260

240

220

Condensing pressure

200

Indoor DB temperature

80
75
70

MU15NN

180

160

68 70 75 80 85 90 95 100 104 F

Outdoor ambient temperature

(PSIG)

90

Indoor DB temperature

80

70

60

Suction pressure

50

86 F

80
75

70

40

68 70 75 80 85 90 95 100 104 F

Outdoor ambient temperature

13

300

320

(PSIG)

280

260

240

220

200

180

160

68 70 75 80 85 90 95 100 104 F

Condensing pressure

Outdoor ambient temperature

Indoor DB temperature

Indoor DB temperature

(PSIG)

40

50

60

70

80

90

68

(20)

70 75 80 85 90 95 100 104 F

Suction pressure

Outdoor ambient temperature

86 F
80
75
70

86 F

80
75

70

Data is based on the condition of indoor humidity 50%. Air flow should be set at Hi. Apoint on the curve shows
the reference point

MU17NN

MU17NN

14

4. STANDARD OPERATION DATA

MS09NW

Cooling

8,500

0.7

0.84

MS09NW

115, 1, 60

0.035

0.34
MU09NW
115, 1, 60

0.805

6.49

0.66

259

80
161
117

49
137

25

2 lbs 2oz

80

67

60

57

1,230

279

95

—

780

1,024

Capacity
SHF
Input
INDOOR UNIT MODEL
Power supply (V, phase, Hz)
Input
Fan current
OUTDOOR UNIT MODEL
Power supply (V, phase, Hz)
Input
Comp. current
Fan current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp
Ref. pipe length
Refrigerant charge

Intake air temperature

Discharge air temperature

Fan speed
Airflow (Hi)

Intake air temperature

Fan speed High / Low
Airflow

Unit

Btu / h

—

kW

kW

A

kW

A

A
psi-G
psi-G

˚F
˚F
˚F
˚F

ft

—
˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

MS15NN

Cooling

14,300/14,600

0.65

1.37/1.40
MS15NN

115, 1, 60

0.047

0.41

MU15NN

208/230, 1, 60

1.323/1.353

6.01/5.51

0.49
256

77
166
116

48
154

25

2 lbs 14 oz

80

67

55

54

1,200

367

95

—

830/900

1,324/1,430

MS17NN

Cooling

15,900/16,100

0.65

1.57/1.60
MS17NN

115, 1, 60

0.054

0.47

MU17NN

208/230, 1, 60

1.516/1.546

7.01/6.41

0.49
252

77
174
114

46
160

25

lbs oz

80

67

56

54

1,290

417

95

—

830/900

1,288/1,394

MS12NN

Cooling

12,300/12,600

0.71

1.10/1.13
MS12NN

115, 1, 60

0.047

0.41

MU12NN

208/230, 1, 60

1.053/1.083

4.71/4.31

0.49
243

78
157
112

48
140

25

2 lbs 14 oz

80

67

58

56

1,200

392

95

—

830/900

1,324/1,430

DB

WB

DB

WB

DB

WB

Item

Model

Total

Electrical
circuit

Refrigerant
circuit

Indoor
unit

Outdoor
unit

POWER SUPPLY

MS09NW

INDOOR UNIT

115V 60Hz, 1[

OUTDOOR UNIT

SIGNAL WIRE
2 wire 12V DC

Field installed
115V 60Hz, 1[

MS12/15/17NN

INDOOR UNIT

115V 60Hz, 1[

OUTDOOR UNIT

SIGNAL WIRE
2 wire 12V DC

Field installed
208/230V 60Hz, 1[

15

5. OPERATING RANGE

Models

MS09NW

MS12NN
MS15NN
MS17NN

MU09NW

MU12NN
MU15NN
MU17NN

Indoor unit

Outdoor unit

Rating

115V 60Hz 1[



208/230V 60Hz 1[



Guaranteed Voltage

Min. 103V — Max. 127V

Min. 198V 208V 230V Max. 253V

Model

MS09NW

MS12NN

MS15NN

MS17NN

Function

Dry

Wet

Dry

Wet

Dry

Wet

Dry

Wet

328
279
452
392
452
367
491
417

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

25.6

21.8

29.2

25.5

29.2

23.9

31.7

27.0

Air flow

(CFM)

Air speed

(ft/sec.)

Coverage

range (ft)

Model

MS09NW

MU09NW

MS12NN
MU12NN
MS15NN
MU15NN
MS17NN
MU17NN

Outdoor unit

precharged
(up to 25ft)

2 lbs 2 oz
2 lbs 14 oz
2 lbs 14 oz

25ft

0

30ft

1

33ft

1

Refrigerant piping length (one way)

40ft

2

45ft

2

49ft

3

3lbs

Function

Cooling

Standard temperature

Maximum temperature

Minimum temperature

Maximum humidity

DB (˚F)

80
95
67

WB (˚F)

67
71
57

Indoor

78%

DB (˚F)

95

115

67

WB (˚F)

—
—
—

Outdoor

—

Condition

Intake air
temperature

(1) POWER SUPPLY

(2) OPERATION

6. OUTLET AIR SPEED AND COVERAGE RANGE

● The air coverage range is the value up to the position

7. ADDITIONAL REFRIGERANT CHARGE (R-22(oz))

16

where the air speed is 1 ft/sec, when air is blown out
horizontally from the unit properly at the High speed
position.
The coverage range should be used only as a gen­eral guideline since it varies according to the size of
the room and furniture arranged in the room.

6

OUTLINES AND DIMENSIONS

MS09NW

INDOOR UNIT

10-13/16

2-3/8

2-3/16

30-13/16

32-1/16

24-5/8

11/16

5-1/8

3-5/16

3-5/16

7-3/8

1-5/8

1/4

3-15/16

8-7/8

12-11/16

7-3/16

3-9/16

8-7/8

12-3/8

3/16

2-13/16

5-1/4

7-3/16

3-11/16

1/4-19-11/16

3/8-16-15/16

1-3/8 O.D.

3/4 I.D

Unit : inch

8-11/16

10-3/8 3/8

1/8

1-13/16

2-9/16

5/8

1-1/8

6-5/16

MU09NW

OUTDOOR UNIT

7/8

10-1/16

21-1/4

11-1/4

12-5/8

10-5/16

3/8

12-5/8

11/16

4-13/16

9-13/16

3-9/16

1-11/16

19-5/8

30-11/16

4-3/8 o 13/16

12-5/16

1-15/16

1-1/16

16-11/16

3/4

2-13/16

1-1/4

11-1/4

9/16 9/16

(5/16 o 7/8)

2-3/8

2-9/16

3-9/16

2-9/16

12-5/8

13-1/2

4-3/16

5/8

20 in

7/16

4

4 in.

16

16 in.

1/4

3/8

4 in.

4 in.

14 in.

17

MS12NN, MS15NN, MS17NN

INDOOR UNIT

5-15/16

7/16 o 13/16

25-1/2

Unit : inch

8-9/16

2-3/8

1-9/16

17-11/16

17-11/16

17-1/4

39-15/16

12-5/8

1-15/16

2-3/16

6-5/16

30-1/2

MU12NN, MU15NN, MU17NN

OUTDOOR UNIT

13-7/8

11/16

7-1/2

11-3/16

13/161/8

10-13/16

11-11/16

2-15/16

7-1/2

3/16

5/16-19-11/16

1/2-16-15/16

1-15/16 O.D.
1-1/8 O.D.

5/8
1-1/8

18

1-3/8

9-3/4

23-13/16

11-1/2

13/16

13-12/16

5/8

7-3/16

19-11/16
33-7/16

13/16

1-15/16

11-7/16

1-3/16

6-3/16

2-15/16

12-3/16

3-15/16

13-9/16

6-5/16

4 in.

20 in.

1/4

5/8

4 in.

4 in.

14 in.

7

WIRING DIAGRAM

MS09NW

MODEL WIRING DIAGRAM

INDOOR UNIT

TB

2

TO OUTDOOR
UNIT
CONNECTING
WIRES
DC12V

POWER
SUPPLY
115V
1 phase
60Hz

GROUND

POWER MONITOR,
RECEIVER
P.C.BOARD

YLW

w

1

VLT

w

N

BLK

w

L1

RED

REMOTE
CONTROLLER

LD101

5

AUTO RESTART
ASSY

CN

104

SYMBOL NAME SYMBOL NAME SYMBOL NAME

C11 INDOOR FAN CAPACITOR NR11 VARISTOR TB TERMINAL BLOCK

HIC1 DC/DC CONVERTER RT11

F11 FUSE(3.0A) RT12

MF INDOOR FAN MOTOR

CN202

1
2

CN201

1
2
3

TAB12

CN
151

5

MV

ELECTRONIC CONTROL P.C BOARD

5

ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR

HIC1

TRANS

F11

SR11

NR11

C11

CN
112

CN

111

CN
121

3
2
1

CN211

3

MV VANE MOTOR

SR11 SOLID STATE RELAY

BLK
GRY
YLW
BRN
WHT
RED

RT12

RT11

1
2
3

MF

4
5
6

NOTE:1. For the outdoor electric wiring, refer to the outdoor unit electric wiring diagram .

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

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

MU09NW

MODEL WIRING DIAGRAM

OUTDOOR UNIT

GROUND

POWER SUPPLY
115V
1 phase 60Hz

FROM INDOOR UNIT
CONNECTING WIRES
DC12V

TB

L1

w w w

RED

N

BLK

w

w

VLT 1

2

w

YLW 2

SYMBOL NAME SYMBOL NAME SYMBOL NAME

C1
C2

COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR

51C OVERCURRENT RELAY 52C COMPRESSOR CONTACTOR

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

2. “w”show the terminals with a lock mechanism, so they can not be removed when you pull

the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.

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

52C 51C

NO

w

w

COM

52C

WHT WHT
WHT

2

C2

1

WHT

C1

WHT
BLK
RED

RED

BLK1

1
2
3

WHT
BLK
RED

C

MC

S

R

MF

MF OUTDOOR FAN MOTOR TB1 TERMINAL BLOCK

MC

COMPRESSOR

(INNER THERMOSTAT)

1.Slide the sleeve.

2.Pull the wire while
pushing the locking
lever.

19

MS12NN, MS15NN, MS17NN

INDOOR UNIT

TB

2

YLW

1

N
L1

w

w

w

VLT

BLK
RED

BRN

DSAR

GRN/YLW

TO OUTDOOR
UNIT
CONNECTING
WIRES
DC12V

POWER
SUPPLY
115V
1 phase
60Hz

GROUND

MODELS WIRING DIAGRAM

CN201

1

12

CN202

CN

CN

102

101

3 3 5 5

2
3

TAB12

CN
104

CN
151

F11

HIC1

TRANS

NR11

C11

SR144
SR142
SR143

CN
112

CN
111

LDCOM
LDC11
LDC12

LDFH
LDFL
LDFM

WHT
ORN
RED
BLK
YLW
BLU

RT12
RT11

1
2
3
4
5
6
7
8

WHT
ORN
RED
BLK
YLW
BLU
BRN

GRN/YLW

MF

RECEIVER
P.C. BOARD

REMOTE
CONTROLLER

DISPLAY
P.C. BOARD

AUTO RESTART
ASSY

MV

SYMBOL NAME SYMBOL NAME SYMBOL NAME

C11 INDOOR FAN CAPACITOR NR11 VARISTOR TB TERMINAL BLOCK

HIC1 DC/DC CONVERTER RT11

F11 FUSE(3.0A) RT12

MF INDOOR FAN MOTOR

NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.

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

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

MU12NN, MU15NN, MU17NN

SR142~SR144

MODELS WIRING DIAGRAM

ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SOLID STATE RELAY

MV VANE MOTOR

DSAR SURGE ABSORBER

OUTDOOR UNIT

GROUND

POWER SUPPLY
208/230V
1phase 60Hz

TB

L1

L2

RED

w

52C

BLU

WHT

www

COMNO

C1

RED

BLK

C

MC

S

R

BLK

BLU

4321

WHTWHT

FROM INDOOR UNIT
CONNECTING WIRES
DC12V

1

w

VLT

w

2

w

YLW

52C

C2

h

ORN

RED

WHT

ORN

RED

MF

SYMBOL NAME SYMBOL NAME SYMBOL NAME

C1
C2

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

2. “w”show the terminals with a lock mechanism, so they cannot be removed when you pull

3. Symbols below indicate.

COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR

the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.

: Terminal block, : Connector

MF
MC

OUTDOOR FAN MOTOR(INNER THERMOSTAT)
COMPRESSOR(INNER THERMOSTAT)

TB TERMINAL BLOCK

52C

COMPRESSOR CONTACTOR

1.Slide the sleeve.

2.Pull the wire while
pushing the locking
lever.

20

8

Indoor heat
exchanger

Indoor heat
exchanger

Refrigerant pipe 3/8
(option)
(with heat insulator)

Refrigerant pipe 5/8
(option)
(with heat insulator)

Refrigerant pipe 1/4
(option)
(with heat insulator)

Refrigerant pipe 1/4
(option)
(with heat insulator)

Stop valve

Stop valve
with service port

Stop valve
with service
port

Stop valve

Service
port

Service
port

Service
port

Service
port

Flared

connection

Flared

connection

Flared

connection

Flared

connection

Accumulator

Accumulator

Compresser

Muffler

Muffler

Room temperature
thermistor
RT11

Room temperature
thermistor
RT11

Distributor

Indoor coil
thermistor
RT12

Fusible plug

MU12NN OD 0.12 o ID 0.071 o 31-1/2
MU15NN OD 0.12 o ID 0.071 o 21-5/8
MU17NN OD 0.12 o ID 0.079 o 27-9/16

Flow of refrigerant

Flow of refrigerant

Indoor coil
thermistor
RT12

Compressor

Fusible plug

Strainer

Strainer

Outdoor heat
exchanger

Outdoor heat
exchanger

Capillary tube

Capillary tube

O.D 0.12 o I.D.0.063 o 47-1/4

REFRIGERANT SYSTEM DIAGRAM

MS09NW / MU09NW

INDOOR UNIT OUTDOOR UNIT

Unit:inch

MS12NN / MU12NN
MS15NN / MU15NN
MS17NN / MU17NN

INDOOR UNIT

Unit:inch

OUTDOOR UNIT

21

9

Operation Indicator

MICROPROCESSOR CONTROL

Wireless remote controller

INDOOR UNIT DISPLAY SECTION

MS09NW, MS12NN, MS15NN, MS17NN

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 turned off, 3-minute time delay will operate
to protect system from overload and compressor will not restart
for 3 minutes.

1. “I FEEL CONTROL” OPERATION

(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” 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 77˚F

55˚F to 77˚F

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

● Under the ON-TIMER operation, the mode is determined
according to the room temperature when 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”
mode, the system operates in previous mode auto­matically regardless of the room temperature.

COOL mode of

“I FEEL CONTROL”

DRY mode of

“I FEEL CONTROL”

22

Example

Previous operation
COOL mode of
“I FEEL CONTROL”

or COOL mode

● 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

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.

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

Model

Initial room temperature

79: or more

COOL mode of

“I FEEL CONTROL”

79˚F or more

DRY mode of

“I FEEL CONTROL”

w1 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” 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.
Each time the TOO WARM or TOO COOL button is pressed,the indoor unit receives the signal and emits a beep tone.

55˚F to 77 ˚F

Initial room temperature
minus 4˚F

Initial room temperature
minus 4˚F

Initial set temperature

75˚F

w 1

● 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
cool. 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 2~4 degrees(°F)

▼ TOO
WARM … To lower the set temperature 2~4 degrees(°F)

23

— COOL mode of “I FEEL CONTROL” —

ON

Compressor and

OFF

ON

OFF

outdoor fan motor

Indoor fan motor

ON

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.

11

Temperature control
<MS09NW> When the indoor coil thermistor RT12 reads 39°F or below for 5 minutes, the coil frost prevention mode starts.
<MS12/15/17NN> When the indoor coil thermistor RT12 reads 30°F or below, the coil frost prevention mode starts

immediately.

However, the coil frost prevention only works after 5 minutes from the compressor starts.

The compressor stops and the indoor fan operates at the set speed for 5 minutes.
After that, if RT12still reads below 39°F (MS09NW) or below 30°F (MS12/15/17NN) this mode is prolonged until the RT12

reads over 39°F (MS09NW) or 30°F (MS12/15/17NN) .

22

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 79°F.
When compressor stops, the accumulated time is cancelled and when compressor restarts, time counting starts
from the beginning.
Time counting also stops temporarily when the indoor fan speed becomes Hi or the room temperature exceeds
79°F. However, when two of the above conditions (b.and c.) are satisfied again.Time accumulation is resumed.

● Indoor fan operates at the set speed by FAN SPEED CONTROLbutton.
Followings are the fan speed in AUTO.

Initial temperature difference
Room temperature minus set temperature : 4 degrees or more············································Hi
Room temperature minus set temperature : 2 degree or more and less than 2 degrees·····Me
Room temperature minus set temperature : less than 2 degree···········································Lo

2 deg.

3 deg.

4 deg.

7 deg.

—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 73°F or over:

Compressor operates by temperature control and time control.

11

Set temperature is controlled to fall 4°F as initial set temperature.

22

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.

2. When the room temperature is under 73°F.

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.

24

Operation time chart

95

86

77

68

59

50

50 59 68 77 86 95FF

Example

Thermostat

1st ON

ON

OFF

Indoor fan

Outdoor fan
compressor

2. COOL OPERATION

(1) Press OPERATE/STOP button.

OPERATION INDICATOR of the indoor unit

turns on with a beep tone.
(2) Select COOL mode.
(3) Set the TEMPERATURE button.

(TOO WARM or TOO COOL button)

The setting range is 59 ~ 89°F

w Indoor fan continues to operate regardless of

thermostat’s OFF-ON

w Coil frost prevention is as same as COOL

mode of “I FEEL CONTROL”

3. DRY OPERATION

(1) Press OPERATE/STOP button.

OPERATION INDICATOR of the indoor unit

turns on with a beep tone.
(2) Select DRY mode.
(3) The microprocessor reads the room temperature

and determines the set temperature. Set temper-

ature is as shown on the right chart.

Thermostat (SET TEMP.)is not working.

The other operations are as same as DRY mode

of “I FEEL CONTROL”.
(4) DRY operation will not function when the room

temperature is 55°F or below.
(5) When DRY operation functions, the fan speed is

lower than cool operation.

ON

OFF

ON

OFF

8 min.

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

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

● During coil frost prevention the indoor fan speed becomes Lo and the outdoor fan is OFF.
(Because the coil frost prevention has priority.)

ON

ON

3 min.

ON

OFF

ON

OFF

1 min.

25

4.FAN OPERATION

(1)Press POWER ON/OFF 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 (MS09NW only)

(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 smoothly.

(2) Fan motor lock-up protection

When the rotational frequency feedback signal has 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

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

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

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

26

(3) Positioning

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

(4) VANE AUTO mode

In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum
room-temperature distribution.

11

In COOL and DRY operation

Vane angle is fixed to Angle 1.

22

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

27

7. TIMER OPERATION

START STOP

START STOP

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

lights.
“

w

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

HR. and MIN, button will work when “
These marks disappear in 1 minute.
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

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

2. CANCEL

Timer setting can be cancelled with the TIMER CONTROLbuttons. (“
To cancel the ON timer, press the “
To cancel the OFF timer, press the “

Timer is cancelled and the display of set time disappears.

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

START

” button... AUTO STOP operation (OFF timer)

STOP

w

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

● A power failure occurs.

● The circuit breaker functions.

” button.

START

w

” button.

STOP

w

w

” or “

START

” mark is flashing.

STOP

START

w

” or “

w

STOP

”)

PROGRAM TIMER

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

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

(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.

28

8. EMERGENCY-TEST OPERATION

Emergency operation
switch

Emergency operation
switch

When the remote controller is missing, has failed or the batteries run down, press the EMERGENCY OPERATION switch
on the front of the indoor unit. The unit will start and the OPERATION INDICATOR lamp 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 COOL MODE with a set temperature of 75°F
The fan shifts to MED speed.
This operation continues until the EMERGENCY OPERATION switch is pressed again or any button on the remote con­troller is pressed,and after that 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 75°F.

NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.

MS09NW

Press once
<Cool>
Press again
<Stop>

MS12NN
MS15NN
MS17NN

29

10

SERVICE FUNCTIONS

MS09NW, MS12NN, MS15NN, MS17NN

1. AUTO RESTART FUNCTION

When the indoor unit is operated with the remote controller, the signals of the operation mode, the set temperature, and the
fan speed are sent from the indoor electronic control P.C.board and memorized in the auto restart assembly.
When the main power is turned off and then turned back on, the unit restarts automatically in the memorized set conditions
approximately after 3 seconds.

NOTE:

a) When the unit operation is stopped with the Emergency Operation Switch, the unit does not restart after the power is

restored, since the signal of “Operation Stop” is memorized in the auto restart assy.

b) Operation details may not be memorized in case the signal is transmitted by the remote controller to turn the main

power OFF within 10 seconds after the power ON. .

c) When the unit operation is stopped with the remote controller before power failure, the unit does not restart until the

OPERATE/STOP (ON/OFF) button on the remote controller is pressed.

2. 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.

}

3. 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 indoor unit number.

How to modify the remote controller P.C. board

Remove batteries before modification.
The board has a print as shown below :

NOTE : For remodeling, take out the

batteries 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 unit as shown in Table 1.

After modification, push the RESET button near the MIN-button on the remote controller.

Table.1

No.1 unit
No.2 unit
No.3 unit
No.4 unit

1 unit operation
No modification

2 unit operation

Same as at left

Cut J1

3 unit operation

Same as at left
Same as at left

Cut J2

4 unit operation
Same as at left
Same as at left
Same as at left

Cut both J1 and J2

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.

30

11

TROUBLESHOOTING

MS09NW, MS12NN, MS15NN, MS17NN

11-1 Cautions on troubleshooting

11-1-1 Before troubleshooting, check the followings:

1) Check the power supply voltage.

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

11-1-2 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.

11-1-3 Troubleshooting procedure

1) First, check if the Operation Indicator 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 32.

11-1-4 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.
The remote controller has a reset button. After installing new batteries, press the reset button with tip end of ball point
pen or the like, and then use the remote controller.

31

11-2 Instruction of troubleshooting

Operation Indicator

Start

Indoor unit oper­ates. Outdoor unit
doesn’t operate.

Outdoor unit
operates in
only Test
Run mode.

Check room
temperature
thermistor.

Outdoor unit
does not
operate even
in Test Run
mode.

Refer to

D

“Check of
outdoor unit”
on page 36.

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

Refer to

B

”Check of
receiver P.C.
board” on
page 35.

MS12NN
MS15NN
MS17NN
When the
remote controller
is pressed or
when the
Emergency
operation switch
is pressed,the
fan does not
rotate,with
Operation indi­cator lamp on.

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

Operation monitor lamp on
the indoor unit is flashing
on and off.

2-time flash

2.5-second OFF

MS09NW only

3-time flash

2.5-second OFF

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 “Check

C

of indoor electric
control P.C. board”
on page 36.

11-2-1 troubleshooting check table

Refer to

A

“Check of indoor
fan motor” on
page 34.

Check indoor coil
thermistor. Refer
to“Test point dia­gram and voltage”
on page 37 and 38.

Look at the left lamp flash for the self check table.
w 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

MS09NW only

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 calibration

● Reconnect connector

● Check indoor board

● Disconnect connector CN211 and then

● Check indoor electronic control P.C.

● Check indoor fan motor

● Reconnect conector

32

Check room temperature.
Refer to“Test point dia­gram and voltage” on
page 37 and 38.

Repair

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

board.

2

3

MS09NW, MS12NN, MS15NN, MS17NN

1
2
3

09NW

12/15/17 NN

09NW

RED

RED

RED

ORN

BLK

BLU

BLK

BLK

WHT

WHT

YLW

YLW

GRY
BRN

BRN

WHITE

1
2
3

P

F

12/15/17 NN

RED

ORN

BLK

WHT

P

11-2-2 Trouble criterion of main parts

Part name

Room
temperature
thermistor

Indoor coil
thermistor

Measure the resistance with a tester.
(Part temperature 50°F ~ 86°F)

Normal

8kΩ ~ 20kΩ

Measure the resistance between the terminals with a tester.
(Coil wiring temperature14°F ~ 104°F)

Check method and criterion

Abnormal

Opened or short-circuited

Figure

Compressor

Indoor fan
motor

Outdoor fan
motor

Normal

12NN

1.9~2.4Ω 1.4~1.9Ω

2.7~3.4Ω

15NN 17NN

2.4~3.0Ω

1.4~1.8Ω

2.3~2.9Ω

C-R
C-S

09NW

0.8~1.1Ω

1.9~2.4Ω

Measure the resistance between the terminals with a tester.
(Coil wiring temperature50°F ~ 86°F)

Normal

09NW

Motor partSensor partMotor part

WHT-BLK

BLK-RED

76~83 Ω
70~76 Ω

Measure the voltage Power ON.

BRN-YLW

YLW-GRY

Normal

09NW

4.5 ~ 5.5V

(When fan revolved one time)

0V➔5V➔0V (Approx.)

Abnormal

Remain 0V or 5V

Normal

WHT-BLK

BLK-YLW
YLW-BLU
BLU-BRN
BRN-RED

12/15NN

67~73Ω

9~9.8Ω

4.9~5.5Ω

5.8~6.4Ω
28~32Ω 36~40Ω

17NN

53~59Ω
10~12Ω

4.6~5.0Ω

5.4~6.0Ω

Measure the resistance between the terminals with a tester.
(Coil wiring temperature14°F ~ 104°F)

Normal

WHT-BLK

BLK-YLW

09NW

55~68Ω

114~141Ω

12/15/17NN

102~126Ω

97~120Ω

Abnormal

Opened or

short-circuited

Abnormal

Opened or

short-circuited

Abnormal

Opened or

short-circuited

Abnormal

Opened or

short-circuited

Vane motor

Measure the resistance between the terminals with a tester.
(Part temperature 50°F ~ 86°F)

Normal

09NW

282 ~ 305Ω

12/15/17NN
358 ~ 387Ω

Opened or short-circuited

Abnormal

33

A

Check of indoor fan motor

Inodoor fan does not operate.

Turn OFF power supply.
Check connector (Fan motor) visually.

No

Reconnect lead wires

Are lead wires connected?

Disconnect lead wires from connector (Fan motor) on indoor electronic control P.C. board.
Measure resistance between lead wires No.1 and No.3 and then No.2 and No.3 (09NW)

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

Repair indoor fan motor.

Yes

Yes ( 0 or ∞ )

{

No.1 and No.4 and then No.3 and No.4 (12/15/17NN)

12/15/17NN

No

(others)

09NW

No

Is soldered point nomal?

Yes

}

Replace indoor electronic control
P.C. board.

Insert screwdriver into air outlet to
rotate indoor fan motor slowly for 1
revolution or over, and measure
voltage between CN 121

Does voltage repeat 0V

DC and more than 5V?

No

Resolder it.

11~22

.

Yes

34

Check of receiver P.C. board

B

Indoor unit operates by pressing the Emergency operation 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

Connect properly.

No
(not clear)

No

No

Replace batteries.(see page 31.)

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 3.28ft?

No

MS12/15/17NN

The connector connecting
Receiver P.C. board and Micom
P.C. board is properly fixed.

Yes

Replace Receiver P.C. board.

No

Yes

Replace remote controller.

● Re-install the unit away from lights.

● Attach a filter on receiving part.

MS09NW

Connect properly

Replace Auto Restart Assy.

Reolace Micom P.C. board.

No

No

No

No

The unit receives signal of Operate
ON/OFF with remote controller,
and emits a beep tone.

Yes

END

The connecer of Auto Restart Assy
is properly fixed.

Yes

Replace Auto Restart Assy.

The unit receives signal of Operate
ON/OFF with remote controller,
and emits a beep tone.

Yes

END

The unit receives signal of Operate
ON/OFF with remote controller,
and emits a beep tone.

Yes

END

35

Check of indoor electronic control P.C. board

C

The unit doesn’t operate with

the remote controller.

Replace fuse.

Also, the operation indicator

doesn’t light up by pressing the
emergency ON/OFF switch.

Is fuse(F11)blown?

Check both “parts side”and “pattern

w

side

of indoor electronic control P.C.

board visually

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

Yes

No

1.Pull out power supply
cord.

2.Measure resistance
between CN201

1

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

Trouble of indoor electronic con­trol P.C. board.

Yes

Is there resistance
(Approx.0Ω)

N

No

Trouble of fuse(F12)

D

Check of outdoor unit

Is varistor(NR11)burnt?

Yes

Replace varistor.

No

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

Start

Press Emergency operation switch.
3-minute time delay works.
Test mode operates for 30 minutes.

Check resistance to terminal block of outdoor unit. Is
there 115V(MS09NW), 208/230V(MS12/15/17NN) to
terminal block between - (MS09NW), ­(MS12/15/17NN)?

N

L1

No

L1

L2

No

Check the indoor, outdoor connection and
respective power supply.

CN201

11

33

L1

Terminal

N

block

Check voltage to terminal block of indoor unit. Is there
12V to terminal block between - ?

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

No

2

1

36

No

Replace indoor electronic control P.C.
board.

TEST POINT DIAGRAM AND VOLTAGE

32F50 68 86 104 122 140

MS09NW
Indoor electronic control P.C. board

TAB 12
CN201 No.1

Varistor(NR11)

Fuse AC250V 3.0A

Room temperature
thermistor (RT11)

Indoor coil
thermistor (RT12)

}

Power supply input
AC115V

Timer short mode
point

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

37

TEST POINT DIAGRAM AND VOLTAGE

32F50 68 86 104 122 140

MS12NN, MS15NN, MS17NN
Indoor electronic control P.C. board

Fan motor power supply

Me Lo Hi

}

8 7 5 6 4 3 2 1

Varistor(NR11)

Fuse AC250V 3.0A

Power supply input AC115V

}

JP7

+

JP9

--

JP11
JP24

+

--

DC12V

}

DC5V

}

CN201

38

JPS

Time short mode point

JPG
CN112

CN111

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

Indoor coil thermistor (RT12)

Room temperaure thermistor (RT11)

12

DISASSEMBLY INSTRUCTIONS

NOTE:

w 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.

12-1 MS09NW

INDOOR UNIT

OPERATING PROCEDURE PHOTOS

1. Removing the front panel

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

Remove the screws.

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

catches at the top.

11

Slide the sleeve.

22

Pull the wire while pushing

the locking lever.

Photo 1

Front panel

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 2

Screw

Room temperature
thermistor connector

Indoor electronic
control P.C.
board

Terminal block
cover

Terminal block
cover screw

39

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

electrical box.

4. Removing the vane motor

(1) Remove the front panel.
(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

40

Fan motor
catches

Fan motor
fixture

Indoor coil
thermistor

12-2 MS12NN, MS15NN, MS17NN

INDOOR UNIT

OPERATING PROCEDURE PHOTOS

1. Removing the front panel

(1) Remove the screw caps at the bottom of the front panel.

Remove the screws.

(2) Pull the down of the front panel to your side slightly and

unhook the catches at the top of the front panel.

2. Removing the electronic control P.C. board

(1) Remove the front panel. (Refer to 1)
(2) Remove the screw, remove the electrical cover.
(3) Remove the elect cover.
(4) Remove the screw on the terminal block.
(5) Unhook the catch of the lamp holder.
(6) Remove the receiver holder.
(7) Disconnect the connectors and the lead wire from 52C

relay on the electronic control P.C. board and remove the
ground and the indoor coil thermistor.

(8) Remove the electronic P.C. board.

Photo 1

Photo 2

Ground

Front panel

Screws

Indoor coil thermistor

Screw

Terminal
block
screw

Electrical
P.C. board

41

OPERATING PROCEDURE PHOTOS

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

(1) Remove the front panel.
(2) Remove the electrical box.
(3) Unhook the catch on the both sides of the nozzle assem-

bly.
(4) Remove the nozzle assembly.
(5) Remove the screws of the bearing support.
(6) Remove the screw of the heat exchanger and unhook the

catch.
(7) Lifting the heat exchanger, remove the bearing support.
(8) Remove the motor support.
(9) Loose the screw fixing the line flow fan, remove the line

flow fan.
(10) Remove the screws of the side cover, remove the fan

motor.

Photo 3

Catch

Heat exchanger

screw

Bearing support
screws

Photo 4

Heat exchanger

Indoor fan motor

Line flow fan Motor band

Fan
motor
screws

42

12-3 MU09NW

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

1. Removing the cabinet

(1) Remove screws securing the top panel.
(2) Remove the screw securing the service panel.
(3) Remove screws securing the cabinet.
(4) Remove the service panel,and remove the screw from the

insides.
(5) Remove the top panel.
(6) Remove the cabinet.

Photo 1

Photo 2

Screw for
service panel

Service
panel

Screw for
top plate

Screws for
cabinet

Screw for
top plate

2. Removing the propeller fan and the outdoor fan motor

(1) Remove the cabinet.(Refer to 1)
(2) Remove the propeller fan nuts.
(3) Remove the propeller fan.
NOTE:Loose the propeller fan in the rotating direction for

removal.

When attaching the propeller fan,align the mark on the pro-

peller fan and the motor shaft cut section.

Set the fan in position by using the cut on the shaft and

the mark on the fan.
(4) Remove lead clamps and disconnect the outdoor fan motor

lead wires.
(5) Remove screws fixing the fan motor.
(6) Remove the outdoor fan motor.

Screw for
cabinet

Photo 3

propeller fan

Outdoor
fan motor

Set screws for
outdoor fan motor

Propeller fan nut

Lead clamps

43

OPERATING PROCEDURE PHOTOS

3. Removing the compressor

(1) Remove the lead clamps.
(2) Remove the screws fixing the relay panel.
(3) Remove the screw fixing the service port.
(4) Remove the terminal cover.
(5) Pull out the lead from the compressor terminal.
(6) Remove the overcurrent relay.
(7) Remove the compressor nuts.
(8) Detach the suction pipe welded section and discharge pipe

welded section .

NOTE

● Before using a torch, reclaim gas from the pipes until the pres­sure gauge shows 0 PSIG.

● Use the torch under the condition that gas can be released
even when the inner pressure rises by heat.

●Reclaim all refrigerant in an environmentally acceptable

manner.

Photo 4

Terminal cover

compressor Suction pipe

Discharege pipe

44

12-4 MU12NN, MU15NN, MU17NN

OUTDOOR UNIT

OPERATING PROCEDURE

PHOTOS

1. Removing the cabinet

(1) Remove the screws of the cabinet.
(2) Hold the bottom of the cabinet on the both side to remove

the cabinet.

Photo 1

Screws

Service
panel

Photo 2

Screws

2. Removing the electrical parts

(1) Remove the service panel and the cabinet.
(2) Remove the following parts.

•Compressor capacitor (C1)

•Outdoor fan capacitor (C2)

•Terminal block

Photo 3

Compressor capacitor

45

OPERATING PROCEDURE

3. Removing the outdoor fan motor

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

motor lead wire.
(3) Remove the propeller nut and remove the propeller fan.
(4) Remove screws securing the fan motor.

Photo 4

PHOTOS

Clamp

Connector

4. Removing the compressor

(1) Remove the cabinet. (Refer to 1)
(2) Remove the soundproof felt.
(3) Remove the terminal cover on the compressor
(4) Disconnect lead wires from the glass terminal of the com-

pressor.(Refer to 2)
(5) Release gas from the refrigerant circuit.
(6) Disconnect the welded part of the discharge pipe.
(7) Disconnect the welded part of the suction pipe.
(8) Remove nuts securing the compressor.
(9) Remove the compressor.

NOTE

●Reclaim all refrigerant in an environmentally acceptable

manner.

Propeller fan

Photo 5

Compressor

Soundproof felt

Propeller fan nut

Discharge
pipe

Suction
pipe

46

Compressor nuts

13

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

MS09NW

(WH)

Remarks

(Drawing No.)

Q'ty / set

1
2
3
4
5
6

FRONT PANEL(WH)
GRILLE(WH)
AIR FILTER
BOX(WH)
INSTALLATION PLATE
SCREW CAP(WH)

1
1
2
1
1
2

1PC/SET

2PCS/SET

E02 268 000
E02 151 010
E02 164 100
E02 166 234
E02 151 970
E02 166 067

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

MS09NW

(WH)

Remarks

(Drawing No.)

Q'ty / set

1
2
3

INDOOR HEAT EXCHANGER
UNION(GAS)
UNION(LIQUID)

1
1
1



{3/8
{1/4

E02 155 620
E02 151 666
E02 151 667

PARTS LIST

INDOOR UNIT
STRUCTURAL PARTS
MS09NW (WH)

1

6

2

5

4

OPTIONAL PARTS
(See page 55)

INDOOR UNIT
HEAT EXCHANGER
MS09NW (WH)

23

1

3

47

INDOOR UNIT

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

MS09NW

(WH)

Remarks

(Drawing No.)

Q'ty / set

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19

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
ELECT CONTROL P.C.BOARD
SLEEVE BEARING
FUSE
ELECTRICAL BOX
INDOOR FAN CAPACITOR
VARISTOR
RECEIVER
AUTO RESTART

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

RC 4W19­2PCS/SET

250V/3.0A

5.0µF / 250VAC

MV
MF

RT11
RT12

TB

F11

C11

NR11

E02 199 520
E02 166 040
E02 141 702
E02 151 303
E02 268 300
E02 151 505
E02 151 302
E02 151 509
E02 151 308
E02 151 307
E02 268 375
E02 268 450
E02 001 504
E02 268 382
E02 164 081
E02 268 350
E02 268 385
E02 151 468
E02 268 452

FAN GUARD

ELECTRICAL PARTS
MS09NW (WH)

8

13

15

9

10

7

11

3

2

Part numbers that are circled are not shown in the illustration.

48

4

6

5

1

12

OUTDOOR UNIT

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

MU09NW

Remarks

(Drawing No.)

Q'ty / set

1
2
3
4
5
6
7
8

9
10
11
12
13
14

CABINET
TOP PANEL
FAN GUARD
SERVICE PANEL
OUTDOOR HEAT EXCHANGER
COMPRESSOR
COMPRESSOR RUBBER SET
STOP VALVE(LIQUID)
STOP VALVE(GAS)
MOTOR SUPPORT
BASE
CAPILLARY TUBE
MUFFLER
CONTACTOR

1
1
1
1
1
1
3
1
1
1
1
1
1
1

KH122WES
3RUBBER

{ 1/4
{ 3/8

{0.12 o {0.063 o 47-1/4

MC

52C

E02 096 232
E02 085 297
E02 085 521
E02 085 245
E02 085 630
E02 268 900
E02 268 506
E02 096 662
E02 096 661
E02 085 515
E02 268 290
E02 158 936
E02 097 933
E02 124 340

STRUCTURAL PARTS
MU09NW

1

2

5

10

8

9

3

Part numbers that are circled are not shown in the illustration.

4

7

6

11

49

OUTDOOR UNIT

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

MU09NW

Remarks

(Drawing No.)

Q'ty / set

1
2
3
4
5

PROPELLER FAN
OUTDOOR FAN MOTOR
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
TERMINAL BLOCK

1
1
1
1
1

RA6W23 ­55µF/220VAC

5.0µF/250VAC

MF
C1
C2

TB1

E02 085 501
E02 268 301
E02 268 353
E02 268 351
E02 268 374

FUNCTIONAL PARTS AND ELECTRICAL PARTS
MU09NW

1

2

4

5

3

50

INDOOR UNIT

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

Remarks

(Drawing No.)

Q'ty / set

1

2
3
4
5
6

7

FRONT PANEL(WH)
FRONT PANEL(WH)
FRONT PANEL(WH)
GRILLE(WH)
BOX(WH)
AIR FILTER
INSTALLATION PLATE
SCREW CAP(WH)
LAMP PANEL
LAMP PANEL
LAMP PANEL

1

1
1
2
1
3

1

1
1
1
2
1
3

1

1

1
1
2
1
3
1

15NN(WH) 17NN(WH)12NN(WH)

MS

1PC/SET

3PCS/SET

E02 270 000
E02 271 000
E02 272 000
E02 138 010
E02 143 234
E02 141 100
E02 141 970
E02 143 067
E02 270 007
E02 271 007
E02 272 007

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

MS12NN, MS15NN, MS17NN

(WH)

Remarks

(Drawing No.)

Q'ty / set

1
2
3

INDOOR HEAT EXCHANGER
UNION(LIQUID)
UNION(GAS)

1
1
1

{1/4
{5/8

E02 141 620
E02 138 667
E02 138 666

STRUCTURAL PARTS
MS12NN (WH)
MS15NN (WH)
MS17NN (WH)

1

5

3

OPTIONAL PARTS
(See page 55)

2

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

INDOOR UNIT
HEAT EXCHANGER PARTS
MS12NN (WH)
MS15NN (WH)
MS17NN (WH)

6

4

1

2

3

51

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

Remarks

(Drawing No.)

Q'ty / set

1
2
3

4

5
6

7

8

9
10
11
12
13
14
15
16
17
18
19
20

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

1
1
1
1

2
1

1

1
1
1
1
1
1
1
1
1
1
1
1
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

2
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1

FAN GUARD

RA4W18 ­RA4W23 ­2PCS/SET

6.0µF/250V
250V 3.0A

MF
MF

MV

TB

NR11

C11

F11

RT12
RT11

15NN(WH) 17NN(WH)12NN(WH)

MS

E02 138 520
E02 143 040
E02 141 702
E02 270 300
E02 272 300
E02 001 505
E02 268 452
E02 270 450
E02 271 450
E02 272 450
E02 270 081
E02 141 302
E02 141 303
E02 138 329
E02 141 509
E02 268 375
E02 268 385
E02 270 350
E02 268 382
E02 141 468
E02 001 504
E02 138 307
E02 138 308

INDOOR UNIT
ELECTRICAL PARTS
MS12NN (WH)
MS15NN (WH)
MS17NN (WH)

12

18

11

9

5

7

8

5

4

3

19

1

2

Part numbers that are circled are not shown in the illustration.

52

10

13

20

17

OUTDOOR UNIT
STRUCTURAL PARTS
MU12NN
MU15NN
MU17NN

17

11

12

10

4

8

1

2

9

Part numbers that are circled are not shown in the illustration.

No.

Parts No. Parts Name

1

E02 141 232

2

E02 141 521

3

E02 270 245
E02 138 630

4

E02 147 630
E02 138 515

5

E02 139 515
E02 270 900

6

E02 271 900
E02 272 900
E02 270 290

7

E02 156 290

8

E02 270 301

9

E02 141 501
E02 270 353

10

E02 271 353
E02 272 353

11

E02 270 351

12

E02 270 374
E02 140 936

13

E02 176 936
E02 077 937

14

E02 075 506

15

E02 139 662

16

E02 150 661

17

E02 270 233

18

E02 096 932

19

E02 138 340

CABINET
GRILLE
SERVICE PANEL
OUTDOOR HEAT EXCHANGER
OUTDOOR HEAT EXCHANGER
MOTOR SUPPORT
MOTOR SUPPORT
COMPRESSOR
COMPRESSOR
COMPRESSOR
BASE
BASE
OUTDOOR FAN MOTOR
PROPELLER FAN
COMPRESSOR CAPACITOR
COMPRESSOR CAPACITOR
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
TERMINAL BLOCK
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
COMPRESSOR RUBBER SET
STOP VALVE(LIQUID)
STOP VALVE(GAS)
BACK PANEL
ACCUMULATOR
CONTACTOR

Symbol in

Wiring Diagram

MC
MC
MC

MF

C1

C2
TB

52C

3

15
16

7

5

6

1
1
1
1

1

1

1

1
1
1

1
1
1

3
1
1
1
1
1

Q'ty / set

MU

15NN 17NN12NN

1
1
1
1

1

1

1

1
1

1

1
1

1
3
1
1
1
1
1

Remarks

(Drawing No.)

1
1
1

1

1

RH167NHDT
RH207NHDT
RH231NHDT

1

1
1
1

25µF/370V
30µF/370V
35µF/370V

1

3.0µF/440V

1
1

{0.12 o {0.071 o 31-1/2
{0.12 o {0.079 o 27-9/16

1

{0.12 o {0.071o 21-5/8
3RUBBER

3

{1/4

1

{5/8

1
1
1
1

53

ACCESSORY AND REMOTE CONTROLLER PARTS

No.

Parts No. Parts Name

Symbol in

Wiring Diagram

MS09NW, MS12NN

MS15NN, MS17NN

(WH)

Remarks

(Drawing No.)

Q'ty / set

1
2

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

1
1

E02 268 426
E02 141 083

MS09NW (WH)
MS12NN (WH)

2

MS15NN (WH)
MS17NN (WH)

1

54

14

10ft
16ft
23ft
33ft
10ft
16ft
23ft
33ft
49ft

3/8

5/8

1/4

C 13/16
D 1-1/16

C 1-7/32
D 1-1/16

MAC - 440PI
MAC - 441PI
MAC - 442PI
MAC - 443PI
MAC - 670PI
MAC - 671PI
MAC - 672PI
MAC - 673PI
MAC - 674PI

MS09NW

MS12NN
MS15NN
MS17NN

0

1

0

1
3

Pipe length

Cross-section

Part No.Model

A-Gas B-Liquid

Pipe size O.D

Insulation

Additional

refrigerant

charge

R-22(Oz)

OPTIONAL PARTS

1. REFRIGERANT PIPES

The air conditioner has flared connections its on indoor and outdoor sides.
Please use the optional extension pipe as follows.

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.

Part No. Model

MAC-1000FT MS09NW

MAC-1100FT MS12NN,MS15NN,MS17NN

3. DEODORIZING FILTER

● DEODORIZING FILTER removes ammonia and hydrogen sulphide 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 MS09NW

● DEODORIZING FILTER and AIR CLEANING FILTER can be attached on either side.

MAC-1600DF

MS12NN,MS15NN,MS17NN

55

CC

Copyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.

Issued in May 1997 NO. OB192 5042

New publication, effective May 1997.
Specifications subject to change without notice.

3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024

Toll Free: 800-433-4822 ● Toll Free Fax: [phone]

www.mrslim.com

Specifications are subject to change without notice.