Mitsubishi MUH09NW, MSH12NN, MUH12NN, MUH15NN, MUH17NN Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

L

I

S

T

E

D

R

SERVICE MANUAL

Wireless type
Models

No. OB198

MSH09NW
MSH12NN
MSH15NN
MSH17NN

MSH12NN
MSH15NN
MSH17NN
INDOOR UNIT

(WH)

(WH)

(WH)

(WH)

Remote
controller

· MUH09NW

· MUH12NN

· MUH15NN

· MUH17NN

CONTENTS

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

2. TECHNICAL CHANGE·······································4

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

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

5. DATA·································································10

6. OUTLINES AND DIMENSIONS·······················23

7. WIRING DIAGRAM ··········································26

8. REFRIGERANT SYSTEM DIAGRAM··············28

9. MICROPROCESSOR CONTROL ····················30

10. SERVICE FUNCTIONS·····································41

11. TROUBLESHOOTING ······································43

12. DISASSEMBLY INSTRUCTIONS·····················55

13. PARTS LIST······················································65

14. OPTIONAL PARTS···········································74

MUH12NN
MUH15NN
OUTDOOR UNIT

The Slim Line.
From Mitsubishi Electric.

1

SWING

1013/16

FEATURES

LCD wireless

MSH12NN, MSH15NN MUH12NN, MUH15NN

remote controller

Models Cooling capacity Heating Capacity SEER HSPF

MSH09NW 8,800Btu/h 10,500Btu/h 10.0 6.8
MSH12NN 12,900Btu/h 13,500Btu/h 10.2 6.8
MSH15NN 14,600Btu/h 14,800Btu/h 10.7 6.8
MSH17NN 16,200tu/h 17,200tu/h 10.3 6.8

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 better design and easier
to handle than even 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

layout. For instance, MSH09NW is 10
(H✕W✕D), which used to be 143/

16

✕311/8✕ 53/8.

16

/

✕321/16✕ 73/

16

13

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.

MSH09NW

3

2

TECHNICAL CHANGES

MSH09EW ➔ MSH09NW

1. Indoor unit has changed.
(Outline dimension changes. 31-1/8”o5-3/8”o14-3/16”(WoDoH)➔32-1/16”o7-3/16”o10-13/16”(WoDoH))

2. Outdoor unit has changed. (Capillary tube and refrigerant had changed.)

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

4. Indoor auto vane has been adopted.

MSH12EN, MSH15EN ➔ MSH12NN, MSH15NN

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.

MSH17NN

1. New Model

3

PART NAMES AND FUNCTIONS

MSH09NW, MSH12NN, MSH15NN, MSH17NN

REMOTE CONTROLLER

4

INDOOR UNIT

MSH09NW

(When the front panel is opened)

MSH09NW

MSH12NN
MSH15NN
MSH17NN

MSH09NW

MSH12NN, MSH15NN,MSH17NN

OUTDOOR UNIT

MUH09NW

MSH12NN, MSH15NN,MSH17NN

MUH12NN

MUH17NN

MUH15NN

5

4

ITEM MODELS MSH09NW

Capacity

Power
consumption

EER [SEER]
HSPF
COP
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. ampacity
Fan motor
Auxiliary heater

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
Defrost method

Dimensions
Weight

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

Pipe size
Connection method

Between the indoor
& outdoor units

47 [17˚]

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
Btu/h
Btu/h

W
W

V, phase, Hz

A
A

F.L.A

A(kW)

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

in.
in.
in.

lbs.

in.
in.

ft
ft

8,800

10,500

5,300

890
890
820

9.9 [10.0]

6.8

3.5

MSH09NW

White

115, 1, 60

15

0.5

0.37
–

208-265-328
177-226-279

2.3

31-37-42

5/8

32-1/16

7-3/16

10-13/16

18

MUH09NW

Munsell 5Y 7/1

115, 1, 60

20
16

0.7

RH-140WGJT

C-R 0.83 C-S 1.48

12
42

Capillary tube

Reverse cycle

30-11/16

10-1/16

21-1/4

80

Wireless type

12V DC (peak voltage)

Not supplied (optional parts)

1/4

3/8
Flared
Flared

Max. 25
Max. 49

❈1

❈1

❈1
❈2

❈1

❈1

❈1
❈2

❈2

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17

Cooling
Heating

Maximum

Minimum

Maximum

Minimum

Indoor intake air temperature

90˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB

SPECIFICATIONS

Notes ❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, 75˚FWB

❈2 : Rating conditions (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB

Operating Range

6

ITEM MODELS MSH12NN MSH15NN

❈1

❈1

❈1
❈2

❈1

❈1
❈2

❈2

Capacity

Power
consumption

❈1

EER [SEER]
HSPF

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17

47 [17˚]
COP
INDOOR UNIT MODEL
External finish
Power supply

V, phase, Hz
Max. fuse size (time delay)
Min. ampacity
Fan motor
Auxiliary heater

Airflow Lo—Me—Hi

Dry

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

W
Dimensions

D

H
Weight
OUTDOOR UNIT MODEL
External finish
Power supply

V, phase, Hz
Max. fuse size (time delay)
Min. ampacity
Fan motor

Model

Compressor

Winding resistance (at 68˚F) ½

Refrigerant control
Defrost method

W

Dimensions

D

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

Pipe size
Connection method

Between the indoor
& outdoor units

Notes ❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, 75˚FWB

❈2 : Rating conditions (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB
❈3 : include auxiliary electric heater operation at 115V

Liquid

Gas

Indoor

Outdoor

Height difference

Piping length

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB

Btu/h
Btu/h
Btu/h

W
W

F.L.A

A(kW)

CFM
CFM

Pints/h

dB(A)

in.
in.
in.
in.

lbs.

F.L.A

R.L.A
L.R.A

in.
in.
in.

lbs.

in.
in.

12,600/12,900
13,000/13,500

6,800/7,000
1,280/1,310
1,180/1,250
1,110/1,140

9.8/9.8[10.2/10.2]

14,300/14,600
14,500/14,800

8,700/8,900
1,350/1,380
1,250/1,300
1,210/1,240

10.6/10.6 [10.7/10.7]

6.8/6.8

3.2/3.2

MSH12NN

3.4/3.3

MSH15NN

White

115, 1, 60
A
A

15

0.6

0.43
–

360-395-452

311-339-388

3.3

293-321-367

4.7

36-39-42

5/8

39-15/16

7-1/2

12-5/8

31

MUH12NN

MUH15NN
Munsell 5Y7/1
208/230, 1, 60

A
A

15

20

14

0.52

RH-185NHDT

RH-207NHDT

C-R 1.68 C-S 2.78

10
35

Capillary tube

Reverse cycle

33-7/16
11-7/16

23-13/16

99

Wireless type

12V DC (peak voltage)

Not supplied (optional parts)

1/4

5/8
Flared
Flared

ft
ft

Max. 25
Max. 49

Operating Range

Indoor intake air temperature

Cooling
Heating

Maximum

Minimum

Maximum

Minimum

90˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB

7

ITEM MODELS MSH17NN

Capacity

Power
consumption

EER [SEER]
HSPF
COP
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. ampacity
Fan motor
Auxiliary heater

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
Defrost method

Dimensions
Weight

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

Pipe size
Connection method

Between the indoor
& outdoor units

47 [17˚]

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
Btu/h
Btu/h

W
W

V, phase, Hz

A
A

F.L.A

A(kW)

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

in.
in.
in.

lbs.

in.
in.

ft
ft

16,000/16,200
16,800/17,200
10,100/10,300

1,560/1,580
1,500/1,570
1,410/1,510

10.3/10.3 (10.4/10.4)

6.8/6.8

3.3/3.2

MSH17NN

White

115, 1, 60

15

0.7

0.51
–

406-441-491
342-371-413

5.1

40-43-45

5/8

39-15/16

7-1/2

12-5/8

31

MUH17NN

Munsell 5Y 7/1

208/230, 1, 60

20
15

0.75

RH-231NHDT

C-R 1.65 C-S2.67

11
38

Capillary tube

Reverse cycle

34-1/4
11-5/8
33-1/2

128

Wireless type

12V DC (peak voltage)

Not supplied (optional parts)

1/4

5/8
Flared
Flared

Max. 25
Max. 49

❈1

❈1

❈1
❈2

❈1

❈1

❈1
❈2

❈2

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17

Cooling
Heating

Maximum

Minimum

Maximum

Minimum

Indoor intake air temperature

90˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB

Notes ❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, 75˚FWB

❈2 : Rating conditions (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB

Operating Range

8

Model

MSH09NW

MSH12NN
MSH15NN
MSH17NN

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

9

5

MODEL

Refrigerant piping length (one way)

MSH09NW
MSH12NN
MSH15NN
MSH17NN

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

Models

Indoor air Outdoor intake air DB temperature(˚F

)

MSH09NW

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

TC

10.8

10.2

9.6

15.8

15.0

14.1

17.9

16.9

15.9

19.8

18.8

17.7

SHC

6.1

7.1

8.0

9.1

10.6

11.9

9.2

11.0

12.5

10.1

12.0

13.7

TPC

0.79

0.75

0.71

1.17

1.10

1.05

1.23

1.16

1.10

1.41

1.33

1.26

TC

10.1

9.5

8.9

14.8

13.9

13.0

16.7

15.8

14.7

18.5

17.5

16.4

SHC

5.7

6.7

7.4

8.5

9.9

11.0

8.6

10.2

11.6

9.4

11.2

12.7

TPC

0.87

0.82

0.79

1.28

1.21

1.16

1.35

1.28

1.22

1.54

1.46

1.40

TC

9.5

8.8

8.3

13.9

12.9

12.1

15.7

14.6

13.7

17.4

16.2

15.2

SHC

5.4

6.2

6.9

8.0

9.2

10.2

8.1

9.5

10.8

8.8

10.4

11.8

TPC

0.94

0.89

0.85

1.38

1.31

1.25

1.45

1.38

1.31

1.66

1.58

1.51

TC

8.8

8.2

7.5

12.9

12.0

11.0

14.6

13.6

12.5

16.2

15.1

13.9

SHC

5.0

5.7

6.3

7.4

8.5

9.3

7.5

8.8

9.8

8.2

9.6

10.7

TPC

0.98

0.94

0.91

1.45

1.39

1.34

1.53

1.46

1.41

1.75

1.68

1.61

TC

8.1

7.5

6.9

11.9

11.0

10.1

13.4

12.5

11.4

14.9

13.9

12.6

SHC

4.6

5.3

5.7

6.8

7.8

8.5

6.9

8.1

8.9

7.6

8.9

9.8

TPC

1.02

0.99

0.94

1.51

1.45

1.39

1.59

1.53

1.46

1.82

1.75

1.68

IWB

(˚F)

75 85 95 105 115

MSH12NN

MSH15NN

MSH17NN

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

Models Outdoor intake air WB temperature(˚F

)

MSH09NW

75
70
65
75
70
65
75
70
65
75
70
65

TC

6.1

6.5

6.6

7.8

8.3

8.5

8.6

9.1

9.3

10.0

10.6

10.8

TPC

0.66

0.64

0.61

0.93

0.90

0.86

0.97

0.94

0.90

1.17

1.13

1.08

TC

7.6

7.9

8.2

9.8

10.1

10.6

10.7

11.1

11.6

12.5

12.9

13.5

TPC

0.78

0.76

0.73

1.09

1.07

1.03

1.14

1.11

1.07

1.37

1.34

1.30

TC

9.1

9.3

9.6

11.7

11.9

12.4

12.8

13.1

13.5

14.9

15.2

15.7

TPC

0.87

0.85

0.82

1.22

1.19

1.16

1.27

1.24

1.20

1.53

1.49

1.45

TC

10.2

10.5

10.8

13.2

13.5

13.9

14.4

14.8

15.2

16.8

17.2

17.7

TPC

0.91

0.89

0.87

1.28

1.25

1.22

1.33

1.30

1.27

1.61

1.57

1.53

TC

10.6

10.8

11.1

13.6

13.9

14.3

14.9

15.2

15.7

17.3

17.7

18.2

TPC

0.93

0.91

0.88

1.30

1.28

1.24

1.35

1.33

1.29

1.63

1.60

1.55

TC

12.0

12.2

12.5

15.4

15.7

16.1

16.9

17.2

17.6

19.6

20.0

20.5

TPC

0.96

0.94

0.93

1.35

1.33

1.30

1.40

1.38

1.35

1.70

1.66

1.63

IWB

(˚F)

15 25 35 43 45 55

MSH12NN

MSH15NNMSH15NNMSH15NNMSH15NNMSH15NN

MSH17NN

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. Heating capacity correction factors.

DATA

MSH09NW, MSH12NN, MSH15NN, MSH17NN

1. PERFORMANCE DATA

1) COOLING CAPACITY

2) COOLING CAPACITY CORRECTIONS

3) HEATING CAPACITY

10

2. PERFORMANCE CURVE

71
67
63

71
67
63

65
70
75

75
70
65

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air DB temperature (¡F)

Indoor intake air WB temperature (

¡F)

Indoor intake air WB temperature (

¡F)

Cooling capacity

SHF at rating condition = 0.7

= 279CFM
= 0.23

Airflow

Bypass Factor

12

10

8

6

1.2

65 75 85 95 105 115

0.8

0.6

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air WB temperature (¡F)

Indoor intake air DB temperature (¡F)

Indoor intake air DB temperature (

¡F)

Heating capacity

= 328CFM

Airflow

12

14

10

8

6

1.1

1.0

15 25 35 45 55

0.8

0.6

0.7

0.9

NOTE : Apoint on the curve shows the reference point.

MSH09NW
MUH09NW

11

NOTE : Apoint on the curve shows the reference point.

71
67
63

71
67
63

16

14

10

12

2

1

Indoor intake air DB temperature (

¡

F)

Indoor intake air DB temperature (

¡

F)

65
70
75

65
70
75

20

16

8

12

1.6

0.6

Cooling capacity

SHF at rating condition = 0.71

= 388CFM
= 0.15

Airflow

Bypass Factor

65 75 85 95 105 115

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air DB temperature (¡F)

Indoor intake air DB temperature (

¡

F)

Heating capacity

= 452CFM

Airflow

15 25 35 45 55

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air WB temperature (¡F)

0.8

1.0

1.2

1.4

Indoor intake air DB temperature (

¡

F)

MSH12NN
MUH12NN

12

NOTE : Apoint on the curve shows the reference point.

71
67
63

71
67
63

65
70
75

75
70
65

Indoor intake air WB temperature (

¡

F)

Cooling capacity

SHF at rating condition = 0.65

= 367CFM
= 0.22

Airflow

Bypass Factor

65 75 85 95 105 115

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

22

18

14

10

2

Outdoor intake air DB temperature (¡F)

Indoor intake air DB temperature (

¡

F)

Heating capacity

= 452CFM

Airflow

15 25 35 45 55

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

20

16

8

1.4

0.8

Outdoor intake air WB temperature (¡F)

1

12

1.0

1.2

0.6

Indoor intake air DB temperature (

¡

F)

Indoor intake air WB temperature (

¡

F)

MSH15NN
MUH15NN

13

NOTE : Apoint on the curve shows the reference point.

71
67

63

71
67
63

65
70
75

75
70
65

Indoor intake air WB temperature (

¡

F)

Indoor intake air WB temperature (

¡

F)

Cooling capacity

SHF at rating condition = 0.64

= 413CFM
= 0.24

Airflow

Bypass Factor

65 75 85 95 105 115

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

24

20

16

12

2

1

Outdoor intake air DB temperature (¡F)

Indoor intake air DB temperature (

¡

F)

Indoor intake air DB temperature (

¡

F)

Heating capacity

= 491CFM

Airflow

15 25 35 45 55

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

20

16

12

8

2.0

1.0

Outdoor intake air WB temperature (¡F)

1.2

1.6

1.4

1.8

MSH17NN
MUH17NN

14

3. Condensing presure

86 F
80
75
70

(Psi.G)

300

280

260

240

220

200

180

160

140

68 70 75 80 85 90 95 100 104 F

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature (

¡F)

86 F

80
75

70

Intdoor DB temperature (

¡F)

(psi.G)

40

50

60

70

80

90

100

68 70 75 80 85 90 95 100 104 F

Suction pressure

Outdoor ambient temperature

75 F
70

65

(psi.G)

310
300

290
280
270
260
250

230

240

220
210
200
190

170

180

150

160

5 10 15 20 25 30 35 40 45 50 55 60 65 70 F

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature(¡F)

75 F
70
65

(psi.G)

80

70

60

50

40

30

20

10

5 10 15 20 25 30 35 40 45 50 55 60 65 70 F

Suction pressure

Outdoor ambient temperature

Intdoor DB temperature (

¡F)

MSH09NW(Cooling)

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

MSH09NW(Heating)

Data is bassed on the condition of outdoor humidity 75%.
Air flow should be set at Hi.
A point on the curve shows the reference point.

15

MSH12NN(Cooling)

86 F
80
75
70

(Psi.G)

300

320

280

260

240

220

200

180

160

140

68 70 75 80 85 90 95 100 104( F)

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature (¡F)

86 F

80
75

70

Intdoor DB temperature (

¡F)

(psi.G)

40

50

60

70

80

90

100

68 70 75 80 85 90 95 100 104( F)

Suction pressure

Outdoor ambient temperature

75 F
70

65

(psi.G)

310
300

290
280
270
260
250

230

240

220
210
200
190

170

180

150

160

5 10 15 20 25 30 35 40 45 50 55 60 65 70( F)

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature(¡F)

75 F
70
65

(psi.G)

80

70

60

50

40

30

20

10

5 10 15 20 25 30 35 40 45 50 55 60 65 70( F)

Suction pressure

Outdoor ambient temperature

Intdoor DB temperature (

¡F)

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

MSH12NN(Heating)

Data is bassed on the condition of outdoor humidity 75%.
Air flow should be set at Hi.
A point on the curve shows the reference point.

16

MSH15NN(Cooling)

86 F
80
75
70

(Psi.G)

300

320

280

260

240

220

200

180

160

140

68 70 75 80 85 90 95 100 104( F)

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature (¡F)

86 F

80
75

70

Intdoor DB temperature (

¡F)

(psi.G)

40

50

60

70

80

90

100

68 70 75 80 85 90 95 100 104( F)

Suction pressure

Outdoor ambient temperature

75 F
70

65

(psi.G)

290
280
270
260
250

230

240

220
210
200
190

170

180

150

160

5 10 15 20 25 30 35 40 45 50 55 60 65 70( F)

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature(¡F)

75 F
70
65

(psi.G)

80

70

60

50

40

30

20

10

5 10 15 20 25 30 35 40 45 50 55 60 65 70( F)

Section pressure

Outdoor ambient temperature

Intdoor DB temperature (¡F)

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

MSH15NN(Heating)

Data is bassed on the condition of outdoor humidity 75%.
Air flow should be set at Hi.
A point on the curve shows the reference point.

17

MSH17NN(Cooling)

86 F
80
75
70

(Psi.G)

300

320

280

260

240

220

200

180

160

140

68 70 75 80 85 90 95 100 104( F)

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature (¡F)

86 F
80
75

70

Intdoor DB temperature (

¡F)

(psi.G)

40

50

60

70

80

90

100

68 70 75 80 85 90 95 100 104( F)

Suction pressure

Outdoor ambient temperature

75 F
70

65

(psi.G)

290
280
270
260
250

230

240

220
210
200
190

170

180

150

160

5 10 15 20 25 30 35 40 45 50 55 60 65 70( F)

Condensing pressure

Outdoor ambient temperature

Intdoor DB temperature(¡F)

75 F
70
65

(psi.G)

80

70

60

50

40

30

20

10

5 10 15 20 25 30 35 40 45 50 55 60 65 70( F)

Section pressure

Outdoor ambient temperature

Intdoor DB temperature (¡F)

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

MSH17NN(Heating)

Data is bassed on the condition of outdoor humidity 75%.
Air flow should be set at Hi.
A point on the curve shows the reference point.

18

4. STANDARD OPERATION

Model

Item

Capacity

Total

Electrical
circuit

Refrigerant
circuit

Indoor
unit

Outdoor
unit

SHF
Input
Indoor unit
Power supply (V, phase, Hz)
Input
Fan current
Aux. heater current
Outdoor unit
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
Airflow

DB

WB

DB

WB

DB

WB

Unit

Btu / h

—

kW

kW

A
A

kW

A

A
psi.G
psi.G

˚F
˚F
˚F
˚F

ft

—
˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

Cooling

8,800

0.70

237

73
162
110

47
147

80

67

59

57

1,230

279

95

–

MSH09NW

Heating

10,500

–

0.89

MSH09NW

115,1,60

0.035

0.34
–

MUH09NW

115, 1, 60

0.855

6.8

0.7
233

60
160
108

37
142

25

2 lbs 5 oz

70

60
104

–

1,430

328

47

43

850

1,059

POWER SUPPLY

MSH09NW

INDOOR UNIT

OUTDOOR UNIT

115V 60Hz, 1[

SIGNAL WIRE
2 wire 12V DC

Field installed
115V 60Hz, 1[

✻ Control voltage

MSH09NW / MUH09NW

Power supply voltage to serial signal circuit is
12V DC.
Between

11

and 33on in-out terminal block will

be 12V DC peak voltage.

19

Cooling

12,600/12,900

0.71

1.28/1.31

1.233/1.263

5.61/5.11

246

82
167
114

51
156

80

67

57

56

388

95

–

Capacity
SHF
Input
Indoor unit
Power supply (V, phase, Hz)
Input
Fan current
Aux. heater current
Outdoor unit
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
Airflow

Unit

Btu / h

—

kW

kW

A
A

kW

A

A
psi.G
psi.G

˚F
˚F
˚F
˚F

ft

—
˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

Cooling

14,300/14,600

0.65

1.35/1.38

1.303/1.333

5.91/5.41

246

80
146
112

58
161

80

67

55

54

367

95

–

Heating

14,500/14,800

–

1.25/1.30

1.203/1.253

5.41/5.11

230

57
158
108

33
143

70

60
107

–

452

47

43

Heating

13,000/13,500

–

1.18/1.25

1.133/1.203

5.11/4.91

220

58
159
106

31
146

70

60
104

–

452

47

43

DB
WB
DB
WB

DB
WB

Item

Model

Total

Electrical
circuit

Refrigerant
circuit

Indoor
unit

Outdoor
unit

MSH12NN

MSH12NN

115, 1, 60

0.047

0.41
–

MUH12NN

208/230, 1, 60

0.49

25

3bs 1oz

1,200

830/900

1,288/1,394

MSH15NN

MSH15NN

115, 1, 60

0.047

0.41
–

MUH15NN

208/230, 1, 60

0.49

25

3bs 1oz

1,200

830/900

1,288/1,394

MSH12NN / MSH15NN

INDOOR UNIT

OUTDOOR UNIT

115V 60Hz, 1[

Field installed
208/230V 60Hz, 1[

SIGNAL WIRE
2 wire 12V DC

POWER SUPPLY

20

✻ Control voltage

MSH12NN / MUH12NN
MSH15NN / MUH15NN

Power supply voltage to serial signal circuit is
12V DC.
Between 11and 33on in-out terminal block will
be 12V DC pesk voltage.

Total

MSH17NN

INDOOR UNIT

OUTDOOR UNIT

115V 60Hz, 1[

Field installed
208/230V 60Hz,

SIGNAL WIRE
2 wire 12V DC

Electrical
circuit

Refrigerant
circuit

Indoor
unit

Outdoor
unit

Model

Item
Capacity
SHF
Input
Indoor unit
Power supply (V, phase, Hz)
Input
Fan current
Aux. heater current
Outdoor unit
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
Airflow

DB

WB

DB

WB

DB

WB

Unit

Btu / h

—

kW

kW

A
A

kW

A

A
psi.G
psi.G

˚F
˚F
˚F
˚F

ft

—

˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

Cooling

16,000/16,200

0.64

1.56/1.58

1,506/1,526

6.69/6.19

243

77
165
113

48
150

80

67

56

54

413

95

–

MSH17NN

MSH17NN

115,1,60

0.054

0.47
–

MUH17NN

208/230, 1, 60

0.61

25

4 lbs 14 oz

1,290

740/800

1,606/1,730

Heating

16,800/17,200

–

1.50/1.57

1,446/1,516

6.39/6.09

242

63
162
112

35
144

70

60
109

–

491

47

43

POWER SUPPLY

✻ Control voltage

MSH17NN / MUH17NN

Power supply voltage to serial signal circuit is
12V DC.
Between 11and 33on in-out terminal block will
be 12V DC pesk voltage.

21

5. OPERATING RANGE

MUH09NW
MUH12NN

MUH15NN
MUH17NN

Indoor unit

Outdoor unit

Rating

115V 60Hz 1[

208/230V 60Hz 1[

Guaranteed Voltage

Min. 103V — Max. 127V

Min. 198V — Max. 253V

MSH09NW
MSH12NN
MSH15NN
MSH17NN

Models

Model

MSH09NW

MSH12NN

MSH15NN

MSH17NN

Function

Dry

Wet

Dry

Wet

Dry

Wet

Dry

Wet

328
279
452
388
452
367
491
413

19.0

16.1

18.2

15.6

18.2

14.8

19.7

16.6

25.6

21.8

29.2

25.2

29.2

23.9

31.7

26.8

Air flow

(CFM)

Air speed

(ft/sec.)

Coverage

range (ft)

MSH09NW
MUH09NW
MSH12NN
MUH12NN
MSH15NN
MUH15NN
MSH17NN
MUH17NN

Outdoor unit

precharged

(up to 25ft)

2 lbs 5 oz
3 lbs 1 oz
3 lbs 3 oz

4 lbs 14 oz

25ft

0

30ft

3

35ft

5

Refrigerant piping length (one way)

40ft

8

45ft

11

49ft

13

Model

Function

Cooling

Heating

Standard temperature

Maximum temperature

Minimum temperature
Standard temperature

Maximum temperature

Minimum temperature

DB (˚F)

80
95
67
70
80
70

WB (˚F)

67
71
57
60

–

60

Indoor

DB (˚F)

95

115

67
47
75
17

WB (˚F)

—
—

—
43
65
15

Outdoor

Condition

Intake air
temperature

(1) POWER SUPPLY

(2) OPERATION

6. OUTLET AIR SPEED AND COVERAGE RANGE

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

22

● The air coverage range is the value up to the position
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 installed inside the room.

6

OUTLINES AND DIMENSIONS

MSH09NW

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

3-11/16

1/4-19-11/16

3/8-16-15/16

1-3/8 O.D.

3/4 I.D

7-3/16

1/8

5/8

1-1/8

Unit: inch

8-11/16

10-3/8 3/8

1-13/16

2-9/16

6-5/16

MUH09NW

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 ✕ 13/16

12-5/16

1-15/16

1-1/16

16-11/16

3/4

2-13/16

1-1/4

12-5/8

11-1/4

9/16 9/16

(5/16 ✕ 7/8)

2-3/8

13-1/2

2-9/16

3-9/16

2-9/16

20 in

5/8

7/16

4

4-3/16

4 in.

16

16 in.

1/4

3/8

4 in.

4 in.

14 in.

23

MSH12NN, MSH15NN, MSH17NN

INDOOR UNIT

5-15/16

7/16 ✕ 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

12-5/8

1-15/16

2-3/16

6-5/16

MUH12NN, MUH15NN

OUTDOOR UNIT

39-15/16

30-1/2

13-7/8

11/16

7-1/2

11-3/16

10-13/16

13/161/8

11-11/16

2-15/16

7-1/2

installation plate

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

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.

24

MUH17NN

OUTDOOR UNIT

Unit: mm

8

upper clearance.

Note:Allow adequate

11/169/16

Air intake

19-11/16

7-9/32 7-9/32

4

1/2

Front opening

1/2

14-1/4

13

Air intake

36

1/2

1-9/161-1/16

Air outlet

(for N.E.C)

Service space

36

1-3/4

Refrigerant pipe

Refrigerant pipe

(Flared) 5/8

33-9/16

21-3/4

Terminal block for indoor and outdoor unit connection

Terminal block for power line

34-1/4

11-7/8

Handie for moving

Service panel

Ground

terminal

15-7/8

20-5/18

17-3/18

2-1/16

2-3/8

(Flared) 1/4

Knock out hole

13-7/8

13-7/4

2-3/820-5/81-9/16

7-1/18

Knock out holes for

power line 1-1/16

4-3/4

for front piping

(refrigerant. drainage

and wiring)

Knock out hole for

right piping

1-3/4
1-5/8

1/5/16

4-1/8

1/2x7/8 Oval hoies

(standard bolt W3/8(M10)

1 max.

3-1/8

R13/16

R13/16

(refrigerant. drainage

and wiring)

Bottom piping hole

Drain hole

Standard bolt length

2-9/16

Front right piping holes-

detail figures

11/16

R1/4

1/2

2-U-shaped

notched

holes

Drain hole

8

40

The upper side must be open.

For 10 units or less

(Concentrated installation)

Outdoor Unit-Necessary surrouding clearance

1/2

4

1

11-5/8

Outlet guide

installation hole

Handle for

moving

Handle for moving

Rear fresh

air intake

Side air intake

2

1

Rear piping hole

3-3/4

5-7/16

25

7

WIRING DIAGRAM

MSH09NW

MODEL WIRING DIAGRAM

INDOOR UNIT

TB

❈

TO OUTDOOR
UNIT
CONNECTING
WIRES
DC12V

POWER
SUPPLY
115V
1 phase
60Hz

GROUND

3
1

N

L1

RECEIVER
P.C.BOARD

ORN

❈

VLT

❈

BLK
RED

5 5

REMOTE
CONTROLLER

LD101

AUTO RESTART
ASSY

104

CN201

1
2
3
4

TAB12

HIC1

TRANS

F11

CN

CN

151

ELECTRONIC CONTROL P.C BOARD

5

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

ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR

MF INDOOR FAN MOTOR

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

MUH09NW

MODEL WIRING DIAGRAM

SR11

NR11

C11

CN

112

CN

111

CN

121

3
2
1

CN211

RT12
RT11

BLK

3

GRY
YLW
BRN

WHT

RED

MV VANE MOTOR

SR11 SOLID STATE RELAY

1
2
3

MF

4
5
6

21S4

OUTDOOR UNIT

TO INDOOR
UNIT
CONNECTING
WIRES
DC12V

POWER SUPPLY
115V
1 phase 60Hz

GROUND

TB

3

❈

1

❈

N

❈

L

1

❈

ORN

VLT

BLK

RED

BLK

CN730

1
3

TAB20

DSAR

RED

F61

IC881

TRANS

52C

NR61

❈3❈4

RT61

CN721

X62

SR61

X62

DEICER P.C. BOARD

CN661

C65

C1

1
2
3
4

CN711

RED
BLK

RED

WHT

BLK

WHT

MF

S

MC

C

R

SYMBOL NAME SYMBOL NAME SYMBOL NAME

C1

C65

COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR

MF
MC

OUTDOOR FAN MOTOR(INNER THERMOSTAT)
COMPRESSOR

(INNER THERMOSTAT)

TB TERMINAL BLOCK

IC881 DC/DC CONVERTER

21S4 SOLENOID COIL 52C COMPRESSOR CONTACTOR NR61 VARISTOR

DSAR SURGE ABSORBER F61 FUSE (2.0A) RT61

DEFROST THERMISTOR

SR61 SOLID STATE RELAY X62 REVERSING VALVE RELAY

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

2. “❈”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

1.Slide the sleeve.

2.Pull the wire while

26

pushing the locking
lever.

MSH12NN, MSH15NN, MSH17NN

MODEL WIRING DIAGRAM

INDOOR UNIT

TO OUTDOOR
UNIT
CONNECTING
WIRES
DC12V

POWER
SUPPLY
115V
1 phase
60Hz

RECEIVER
P.C.BOARD

TB

3
1

N

L1

GROUND

REMOTE
CONTROLLER

❈

ORN

❈

VLT

❈

BLK
RED

BRN

DISPLAY
P.C.BOARD

DSAR

GRN/YLW

AUTO RESTART
ASSY

SR144
SR142
SR143
SR141

112

111

LDCOM

LDC11

LDC12

LDFH
LDFL
LDFM
LDFVL

CN

CN

WHT
ORN
RED

BLK
YLW
BLU
BRN

RT12
RT11

1
2
3
4
5
6
7
8

WHT
ORN
RED
BLK
YLW
BLU
BRN

GRN/YLW

MF

CN201

1
2
3
4

TAB12

CN

CN

CN

101

104

102

33

F11

CN

ELECTRONIC CONTROL P.C BOARD

151

5

5

HIC1

TRANS

C11

NR11

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

SR142~SR144

ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SOLID STATE RELAY

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

MV VANE MOTOR

DSAR SURGE ABSORBER

MUH12NN, MUH15NN, MUH17NN

OUTDOOR UNIT

GROUND

TO INDOOR UNIT
CONNECTING WIRES
DC12V

POWER
SUPPLY
208/230V
1 phase 60Hz

TB

❈

3

VLT

1

❈

1

L

❈

❈

2

L

ORN

RED
RED

RED

BLU

DSAR

MODEL WIRING DIAGRAM

RT61

CN730

CN661

1
3

F61

❈

TAB21

❈

TAB20

NO COM

BLU

IC881

TRANS

52C

X62

21S4

CN721

NR61

DEICER P.C. BOARD

C1

RED

BLK

X62

SR61

WHT

52C

CN720

CN711

C65

MC

1

WHT

2
3

BLK

4

C

RS

MF

REDRED

1

ORN

2

WHT

3

BLK

4

SYMBOL NAME SYMBOL NAME SYMBOL NAME

C1

C65

COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR

DSAR SURGE ABSORBER NR61 VARISTOR X62

MF

MC

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

TB TERMINAL BLOCK

52C

COMPRESSOR CONTACTOR
REVERSING VALVE RELAY

F61 FUSE (2.0A) RT61 DEFROST THERMISTOR 21S4 SOLENOID COIL

IC881 DC/DC CONVERTER SR61 SOLID STATE RELAY

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

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

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

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

1.Slide the sleeve.

2.Pull the wire while
pushing the locking
lever.

27

8

REFRIGERNT SYSTEM DIAGRAM

Unit:inch

MSH09NW

INDOOR UNIT

Indoor
heat

exchanger

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT12

Refrigerant pipe [3/8
(Option)

(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [1/4
(Option)
(with heat insulator)

Stop valve
(with service

port)

Service
port

Fusible
plug

Accumulator

Strainer

Stop valve

Muffler

Reversing

Muffler

Capillary tube
O.D. 0.12✕I.D.

✕35-7/16

0.063

Check
valve

valve

Compressor

Capillary tube
O.D. 0.12✕I.D.

0.063

Strainer

Service
port

Defrost
thermisor
RT61

✕19-11/16

MUH09NW

OUTDOOR UNIT

Outdoor
heat
exchanger

Capillary tube
O.D. 0.12✕I.D. 0.055✕
11-13/16

Solenoid coil
heating ON
cooling OFF

Flow of refrigerant (cooling)
Flow of refrigerant (heating)

Unit:inch

MSH12NN
MSH15NN

INDOOR UNIT OUTDOOR UNIT

Indoor coil

Indoor
heat
exchanger

Room temperature
thermistor
RT11

thermistor
RT12

Distributor

Refrigerant pipe [5/8
(Option)
(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [1/4
(Option)

(with heat insulator)

Muffler

Stop valve
(with service
port)

Service
port

Accumulator

Stop valve

Reversing

valve

Fusible
plug

Muffler

Compressor

Capillary tube
MSH12:O.D. 0.12✕I.D 0.071✕19-11/16
MSH15:O.D. 0.12✕I.D 0.079✕23-5/8

Strainer

Check
valve

Service
port

Defrost
thermisor
RT61

MUH12NN
MUH15NN

Strainer

Outdoor
heat
exchanger

Capillary tube
O.D. 0.12✕I.D.

0.055✕11-13/16

Capillary tube
O.D. 0.12✕I.D.0.079✕7-7/8

Solenoid coil
heating ON
cooling OFF

Flow of refrigerant (cooling)
Flow of refrigerant (heating)

28

Unit:inch

MSH17NN

MUH17NN

INDOOR UNIT OUTDOOR UNIT

Refrigerant pipe [5/8

Indoor coil

Indoor
heat
exchanger

Room temperature
thermistor
RT11

thermistor
RT12

Distributor

(Option)
(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [1/4
(Option)
(with heat insulator)

Ball valve

Ball valve
(with service port)

Service
port

Fusible
plug

Accumulator

Strainer

Reversing

valve

Muffler

Compressor

Capillary tube
O.D. 0.12✕I.D. 0.079✕9-13/16

Check
valve

StrainerStrainer

Muffler

Service
port

Defrost
thermisor
(RT61)

Outdoor
heat
exchanger

Distributor

Solenoid coil
heating ON
cooling OFF

Capillary tube
O.D. 0.12✕I.D. 0.079✕27-9/16

Flow of refrigerant (cooling)
Flow of refrigerant (heating)

29

9

Operation Indicator

MICROPROCESSOR CONTROL

Wireless remote controller

INDOOR UNIT DISPLAY SECTION

MSH09NW, MSH12NN
MSH15NN, MSH17NN

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.

9-1. “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 tempreature

more than 77˚F

73˚F to 77˚F

less than 73˚F

“I FEEL CONTROL”
“I FEEL CONTROL”

“I FEEL CONTROL”

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

● Under the ON-TIMER ( START) operation, 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.

Example

mode

COOL mode of

DRY mode of

HEAT mode of

30

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”

Restart

COOL or DRY or HEAT
mode of “I FEEL CON­TROL” that determined
by initital room tempera­ture at start-up of the
operation.

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

Model Initial room temperature Initial set temperature

COOL mode of

“I FEEL CONTROL”

DRY mode of

“I FEEL CONTROL”

HEAT mode of

“I FEEL CONTROL”

❈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” 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,

79˚F or more

79˚F or less

73˚F to 77˚F

73˚F or less

Initial room temperature
minus 4˚F
Initial room temperature
minus 4˚F

75˚F

79˚F

● 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.

❈ 1

▲ TOO

COOL… To raise the set temperature 2~4 degrees(°F)

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

31

— 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.

① Temperature control
<MSH09> When the indoor coil thermistor RT12 reads 39˚F or below for 5 minutes, the coil frost prevention mode starts.
<MSH12/15/17>When the indoor coil thermistor RT12 reads 37˚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 RT12 still reads below 39˚F (MSH09) or below 37˚F (MSH12/15/17) this mode prolonged until the RT12 reads

over 39˚F (MSH09) or 37˚F (MSH12/15/17).

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 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 4 degrees·····Me
Room temperature minus set temperature : less than 2 degree···········································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 73˚F or over:

Compressor operates by temperature control and time control.

① Set temperature is controlled to fall 4˚F 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.

Fan speed

2 deg.

3 deg.

4 deg.

7 deg.

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.

32

Operation time chart

Example

Thermostat

1st ON

ON

OFF

ON

OFF

ON

OFF

1 min.

Indoor fan

Outdoor fan
compressor

ON

ON

8 min.

ON

OFF

ON

OFF

3 min.

4 min.

NOTE

● Coil frost prevention during DRY mode of “I FEEL CONTROL”
The operation is as same as that of coil frost prevention during COOL mode of “I FEEL CONTROL”.
However the indoor fan speed becomes the set speed or Lo.

— HEAT mode of “I FEEL CONTROL” —

1. Indoor fan speed control

(1) Followings are the fan speed in AUTO.

Set temperature minus room temperature: 4 degrees or more···················································Hi
Set temperature minus room temperature: 2 degrees or more and less than 4 degrees ···········Me
Set temperature minus room temperature: less than 2 degree···················································Lo

(2) Cold air prevention control

The fan runs at set speed when the indoor coil thermistor RT12 temperature exceeds 72˚F. The fan operates at VLo
when the temperature is below 64˚F. But the fan stops when the indoor fan operates at VLo and the temperature is
below 59˚F or less.

Released

Cold Air Prevention

64˚F

NOTE : At intial in hysteresis this control works.

(3) New warm air control.

When compressor starts in heating operation or after defrosting, the fan changes the speed due to the indoor coil ther­mistor RT12 temperature to blow out warm air.
After releasing of cold air prevention, when the indoor coil temperature is 99˚F or above, the fan speed shifts to the set
speed, and when the fan speed is changed by the remote controller, the fan speed is the set speed.
When the indoor coil temperature is less than 99˚F, the fan speed is controlled by time as below.

<Time condition> <Indoor fan speed>
less than 2 minutes························Lo
2 minutes to 4 minutes···················Me
4 minutes or more··························Hi
The upper limit of the fan speed is the set speed.
If the thermostat turns off, this operation changes to flow soft control.

(4) Flow soft control

After the thermostat turns off, the indoor fan operates at VLo.
NOTE : When the thermostat turns on, the fan operates at the set speed. Due to the cold air prevention control, the fan

does not start until the indoor coil thermistor RT12 reads above 72˚F or more.

temperature difference Fan speed

2 deg.

72˚F

4 deg.

3 deg.

7 deg.

33

2. High pressure protection

During heating operation, the outdoor fan motor is controlled by the indoor coil thermistor RT12 temperature for excess rise
protection of compressor discharge pressure.
Outdoor fan OFF: 126˚F (MSH09), 122˚F (MSH12/15/17)
Outdoor fan ON : 118.4˚F (MSH09),115˚F (MSH12/15/17)

High pressure protection time chart
Indoor coil temperrature thermistor

RT12

126˚F(MSH09)
122˚F(MSH12/15/17)

118˚F(MSH09)
115˚C(MSH12/15/17)

Outdoor fan motor
turn OFF

Outdoor fan motor
turn ON

Outdoor fan motor

NOTE: When the outdoor fan is OFF in heating, the defrosting of outdoor heat exchanger is not detected by the defrost ther-

mistor RT61.

3. Defrosting

Defrosting of outdoor heat exchanger is controlled by deicer P.C. board, with detection by the defrost thermistor RT61.

(1) Defrost starting conditions

When all conditions of a) ~ c) are satisfied, the defrosting operation starts.

a) Under the heat operation, the compressor cumulative operation time exceeds for 40 minutes without the defrosting

operation working.
b) The defrost thermistor RT61 reads 27˚F.
c) After releasing the high pressure protection, 4 minutes and 15 seconds have elapsed.

(2) Defrost terminating conditions

When the condition d) or e) is satisfied, the defrosting operation stops.

d) The defrost thermistor RT61 reads 38˚F or more.
e) The defrosting time exceeds 10 minutes.

ON

OFF

OFF

34

(3) Defrost time chart

Defrost thermistor
38˚F or more

RT61 27˚F or less

Outdoor 52C
relay(Compressor)

ON
OFF

X62
(Solenoid coil)

SR61
Outdoor fan

Defrost
counter

Indoor fan

Indoor vane

ON
OFF

ON
OFF

ON
OFF

ON
OFF

Horizontal
set position

30 sec.

❈

VLo

15 sec.

30 sec.

15 sec.

Max 10 min.

NOTE ● When the indoor coil thermistor reads above 64˚F, indoor fan operates at VLo for 30 seconds.

● When the indoor coil thermistor reads 64˚F or less, the indoor fan stops.

35

4. Reversing valve control

50

50

59

68

77

86

95

59 68 77 86 95¡F

¡F

Heating · · · · · ON
Cooling · · · · · OFF
Dry · · · · · · · · OFF

NOTE: The Reversing valve reverses for 5 seconds right before start-up of the compressor.

(COOL / DRY)

(HEAT)

Compressor

Reversing valve

Outdoor fan

ON

OFF
ON

OFF

ON

OFF

9-2. 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

✻ Indoor fan continues to operate regardless of

thermostat’s OFF-ON

✻ Coil frost prevention is as same as COOL

mode of “I FEEL CONTROL”

9-3. 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 tempera-

ture 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”.
(4) DRY operation will not functions when the room

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

is lower than cool operation.

5 sec.

5 sec.

ON
OFF
ON

OFF

ON

OFF

9-4. HEAT OPERATION

(1) Press OPERATE/STOP button.

OPERATION INDICATOR on the indoor unit turns on with a beep tone.
(2) Select HEAT mode.
(3) Press TEMPERATURES button (TOO WARM or TOO COOL button) to select the desired temperature.

The setting range is 59 ~ 89˚F.
(4) Indoor fan speed control, high pressure protection, defrosting, heater control are the same as HEAT mode of “I FEEL

CONTROL”.

36

9-5. FAN MOTOR CONTROL (MSH09 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 45.)

9-6. AUTO VANE OPERATION

(1) Vane motor drive

MSH-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.

VANE

37

(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/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 turns 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.

① In COOL and DRY operation

Vane angle is fixed to Angle 1.

➁ In HEAT operation

Vane angle is fixed to Angle 4.

(5) Dew prevention

During COOL or DRY operation at vane Angle 4 or 5 when the compressor cumulative operation time 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 or the operation stops or changes to other mode.

(7) Cold air prevention in HEAT mode.

When either of the following conditions occurs in HEAT mode, the horizontal vane angle changes to Angle 1 automatically

to prevent cold air blowing on users.

① Compressor is not operating.
➁ Defrosting is performed.
➂ Indoor coil thermistor RT12 reads 75˚F or below.
➃ Indoor coil thermistor RT12 temperature is raising from 75˚F or below, but it does not exceed 82°F.

Indoor coil thermistor RT12 temperature

NOTE : At initial in hysteresis this control works.

38

Angle 1

75˚F

Set position

82˚F

9-7. 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 CLOCK SET button.

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

START” button... AUTO START operation (ON timer)

“

STOP” 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 “
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

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 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.

START” or “ STOP” mark is flashing.

START” or “ STOP”)

START” button.

STOP” button.

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.

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

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

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

39

Emergency operation
switch

Emergency operation
switch

9-8. EMERGENCY-TEST OPERATION

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 POWER MONITOR 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/HEAT MODE with a set temperature of
75˚F.
The fan shifts to Me speed.
This operation continues until the EMERGENCY OPERATION switch is pressed or a button on the remote controller is
pressed, then normal operation will start.
The coil frost prevention circuit operates in this operation, and defrosting operates too.
In the test run or emergency operation, the horizontal vane operates in AUTO mode a the set temperature of 75˚F.
Defrosting of outdoor heat exchanger works in EMERGENCY HEAT MODE.

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

MSH09NW

Press once

<Cool>

Press again

<Heat>

Press once again

<Stop>

MSH12NN
MSH15NN
MSH17NN

40

10

SERVICE FUNCTIONS

MSH09NW, MSH12NN, MSH15NN, MSH17NN

1. COMPULSORY DEFROSTING MODE FOR SERVICE

By short circuit of the connector JP607 and R853 on the outdoor deicer P.C. board, defrosting mode can be accomplished
regardless of the defrost interval restriction. See Page 53.
Defrost thermistor RT61 must read below 27°F

2. DEFROST TERMINATION CHANGE

<JPC> when the JPC wire of the deicer P.C. board is cut, the defrost interval time will be changed.
<JPE> when the JPE wire of the deicer P.C. board is cut, the defrost temperature will be changed.

Model

MSH09NW

MSH12NN
MSH15NN
MSH17NN

3. 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 assy.

When the main power is turned off and then turned on back again, the unit restarts automatically in the memorized set con-

ditions 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.

4. 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

Junper wire Change point

JPC

JPE

Short the connector during the timer mode.

}

Defrost interval time changes from 40 minutes to 15minutes.

Defrost start temperature changes from 27˚F to 32˚F.

Defrost finish temperature changes from 38˚F to 50˚F.

41

5. 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 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 unit as shown in Table 1.
After modification, push the RESET button near the MIN-button on the remote controller.

Table.1

1 unit operation

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

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

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.

42

11

Lead wiring

Reset button

Housing point

TROUBLESHOOTING

MSH09NW, MSH12NN, MSH15NN, MSH17NN

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 how many times abnormality indication is flashing on and off 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 on page 44 and the check table on page 45.

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 con-

troller 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.

43

11-2 Instruction of troubleshooting

Start

Indoor unit oper­ates. Outdoor unit
doesn’t operate.

Outdoor unit
operates in
only Test
Run opera­tion.

Check room
temperature
thermistor.

MSH12NN
MSH15NN
MSH17NN
When the

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

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

Refer to
“Check of
outdoor unit”
on page 49.

D

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

Refer to
”Check of
receiver P.C.
board” on
page 48.

1-time flash

Cause:indoor/outdoor unit
connecting

Trouble of mis-wiring

(

Trouble of the serial signal

Refer to
“How to check
mis-wiring and sig­nal error
(when outdoor unit
doesn’t work)”
on page 50.❈1

B

E

Refer to
“Check of indoor
fan motor” on
page 47.

Indoor unit operation
monitor lamp is flashing.

2-time flash

2.5-second OFF

MSH09NW only
3-time flash

2.5-second OFF

Cause:Indoor unit
2-time-Room tempera-

ture/Indoor coil
thermistor trouble.

MSH09NW only
3-time-Indoor fan motor

trouble

Check indoor coil
thermistor. Refer

A

to“Test point dia­gram and voltage”
on page 51 and

52.

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 of
indoor electric control
P.C. board” on page 49.

6-time flash

Cause:outdoor unit
6-time-Replace the out-

Check room temperature
thermistor. Refer to“Test
point diagram and volt­age” on page 51 and 52.

C

2.5-second OFF

door thermistor

44

❈1<The case of the trouble of the serial signal>

when turn off the power and then turn on the power again, the
indication shows “the trouble of mis-wiring.”

11-2-1 troubleshooting check table

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

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

NO.

Abnormal

point

Indication

Symptom

Detect method

Check point

Mis-wiring

1

2

Room
tempera­ture ther­mistor

3

Serial sig­nal

Indoor coil
thermistor

Indoor fan
motor

1-second ON

1-second OFF

1-second ON

2.5-second OFF

2-time flash

2.5-second OFF

MSH09NW only

3-time flash

2.5-second OFF

Outdoor unit

does not run.

Outdoor unit
does not run.

Indoor fan

repeats 12 sec­onds ON and 3
minutes OFF.

When the indoor

fan breaks, the
fan keeps stop­ping.

When serial signal stops for 4
to 5 seconds after 1st on of
52C relay by POWER turning
on.

When serial signal from out­door unit stops for 4 to 5 sec­onds.

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 wiring (visual sheck and conductiv­ity check).

● Check indoor electronic control P.C.
board.

● Check outdoor DEICER P.C. board.

● Check electrical parts.

● Check thermistor calibretion.

● Reconnect connector.

● Check indoor borad.

● Disconnect connector CN211 and then

check connector CN121 - to 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.

2

3

6-time flash

Outdoor

4

thermistor

2.5-second OFF

Outdoor unit

does not run

When the outdoor thermistor
shorts or opens after the com­pressor start-up.

● Check outdoor DEICER P.C. board.

● Check thermistor calibretion.

45

MSH09NW, MSH12NN, MSH15NN, MSH17NN

1
2
3

09NW

RED

BLK

YLW
GRY
BRN

WHITE

1
2
3

12/15/17 NN

RED

ORN

BLU

BLK

WHT

YLW

BRN

F

09NW

RED

BLK

WHT

P

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

Defrost
thermistor

Compressor

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

8kΩ ~ 20kΩ

Measure the resistance with a tester.
(Part temperature 14°F ~ 104°F)

5kΩ ~ 55kΩ

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

C-R
C-S

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

Motor part

WHT-BLK
BLK-RED

Check method and criterion

Normal

Normal

09NW

0.86~1.06Ω

1.9~2.4Ω

Opened or short-circuited

Opened or short-circuited

Normal

12NN

1.9~2.4Ω 1.4~1.9Ω

2.7~3.4Ω

15NN

2.4~3.0Ω

Normal

09NW

76~83 Ω

70~76 Ω

Abnormal

Abnormal

17NN

1.4~1.8Ω

2.3~2.9Ω

Figure

Abnormal

Opened or

short-circuited

Abnormal

Opened or

short-circuited

Measure the voltage Power ON.

Indoor fan
motor

Sensor partMotor part

BRN-YLW
YLW-GRY

WHT-BLK
BLK-YLW
YLW-BLU
BLU-BRN

BRN-RED

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

Outdoor fan
motor

WHT-BLK
BLK-RED

Vane motor

46

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

Normal

09NW

282 ~ 305Ω

Normal

09NW

4.5 ~ 5.5V

(When fan revolved one time)

0V➔5V➔0V (Approx.)

Normal

12/15NN

67~73Ω

9~9.8Ω

4.9~5.5Ω

5.8~6.4Ω

28~32Ω

Normal

09NW

42~53Ω
74~92Ω

12/15/17NN
358 ~ 387Ω

12/15NN

102~126Ω

97~120Ω

Opened or short-circuited

Abnormal

Remain 0V or 5V

17NN

53~59Ω
10~12Ω

4.6~5.0Ω

5.4~6.0Ω

36~40Ω

17NN

55~68Ω

82~101Ω

Abnormal

Abnormal

Opened or

short-circuited

Abnormal

Opened or

short-circuited

A

Check of indoor fan motor

Inodoor fan does not operate.

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

No

Are lead wires connected?

Reconnect the lead wires.

Yes

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)?

Yes ( 0 or ∞ )

Repair indoor fan motor.

{

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

12/15/17NN

No

(others)

No

Is soldered point normal?

Insert screwdriver into air outlet to

09NW

rotate indoor fan motor slowly for 1
revolution or over, and measure
voltage between YLW and GRY of
CN 121 .

Does voltage repeat 0V
DC and more than 5V?

Replace the indoor electronic con­trol P.C. board.

No

Yes

Resolder it.

}

Yes

47

Check of receiver P.C. board

B

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

Connect properly.

No
(not clear)

No

No

Replace batteries.(see page 43.)

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

MSH12/15/17NN

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.

MSH09NW

48

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

Check of indoor electronic control P.C. board

C

The unit doesn’t operate with the
remote controller.

Replace the fuse.

Also, the OPERATION INDICATOR
lamp doesn’t light up by pressing the
EMERGENCY OPERATION switch.

Is fuse(F11)blown?

Check both “parts side”and “pattern
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 ther resistance?
(Approx.0Ω)

N

No

Trouble of fuse(F12)

Check of outdoor unit

D

Is varistor(NR11)burnt?

Yes

Replace varistor.

No

09NW

12/15/17NN

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

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 AC115V(MSH09),208/230V(MSH12/15/17) to
terminal block between - (MSH09), ­(MSH12/15/17)?

Check voltage to terminal block of indoor unit. Is
there DC12V to terminal block between - ?

NL1 L2L1

No

31

Yes

Check the outdoor DEICER P.C. board at first, then check

Yes

CN201

1144

L1

Terminal

CN201

11

44

the outdoor fan motor and the compressor.

N

L1

L
N

N

block

Terminal

Terminal
block

block

No

Replace indoor electronic control P.C. board.

Check continuity of indoor and outdoor unit connection.

49

How to check mis-wiring and serial signal error (when outdoor unit does not work)

E

Start

Turn off power supply. (indoor/outdoor units)

Turn on power supply. (indoor/outdoor units)

Rectify voltage.
When 230V is available for
MSH09NW outdoor unit,replace
the outdoor P.C. board.

Correct mis-wiring.

No

Power voltage of terminal blocks of
indoor/outdoor units is normal.

Yes

Turn on Emergency operation switch.

Normal operation starts 3 minutes after
power supply is turned on.

No

No

Terminal blocks11and33on indoor unit is
properly connected to their counter parts
on outdoor unit.

Yes

Check by using Checking Mode.

11

Disconnect indoor/outdoor wiring (at indoor ter­minal blocks 11and 33)

22

Short curcuit between indoor terminal blocks
and 33.

33

While pressing Mode button on remote con-

troller,press Reset button.
Do this where the unit can recieve the signal.
(LCD on remote controller displays all signs.)

Press OPERATE ON/OFF button on remote
controller to send signal.

Yes

11

Check if connecting or con­tacting part has no problem.

Replace indoor P.C. board.

No

50

Make sure the unit emits a beep tone.

Operation Indicator lamp on the unit
flashes.

Yes

Replace outdoor P.C.board.

Before the unit resumes normal operation.

•Release the checking mode on remote con­troller by pressing Reset button, and then send
the unit signal to stop operation.

•Turn off power supply to indoor/outdoor units.

•Get indoor terminal blocks of 11and
open,and reconnect in-out wiring.

❈ Be sure to turn off power supply to indoor/out-

[ ]

door units in replacing P.C.board.

33

In checking mode,Operation Indicator

[ ]

lamp does not indicate its actual state.

END

TEST POINT DIAGRAM AND VOLTAGE

32F50 68 86 104 122 140

MSH09NW
Indoor electronic control P.C. board

CN201 No.1

Power supply input AC115V

}

CN201 No.1

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

Varistor(NR11)

Fuse AC250V 3.0A

Room temperature
thermistor (RT11)

Indoor coil
thermistor (RT12)

JPS

Timer short mode
point

JPG

51

TEST POINT DIAGRAM AND VOLTAGE

32F50 68 86 104 122140

MSH12NN, MSH15NN, MSH17NN
Indoor electronic control P.C. board

Fan motor power supply

VLo Me Lo Hi

8 7 5 6 4 3 2 1

Varistor(NR11)

Fuse AC250V 3.0A

Power supply input AC115V

}

JP17

+

JP16

--

DC12V

}

CN201

JP11

+

DC5V

JP24

JPS
JPG

CN112
CN111

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

}

--

Time short mode point

Indoor coil thermistor (RT12)

Room temperature thermistor (RT11)

52

MUH09NW

˚F

-4 14 32 50 68 86 104

MUH12NN
MUH15NN
MUH17NN

Outdoor fan motor

AC115V(MUH09)
AC208/230V(MUH12/15/17)

Solenoid coil

AC115V(MUH09)
AC208/230V(MUH12/15/17)

}

}

R601
DC5~10V

}

INPUT

+

--

DEICER P.C. BOARD

AC115V(MUH09)
AC208/230V(MUH12/15/17)

Defrost
thermistor(RT61)

}

}

--

}

DC12V

Fuse
2A/250V

Defrost interval
time short pin

+

J8

DC5V

}

J7

--

+

+

}

52C

DC12V

--

Defrost termination
temperature change.
Jumper wire JPC and JPE.

53

RELAY OPERATION
MSH09NW
MSH12NN
MSH15NN
MSH17NN

MODE

COOL &
COOL mode
of I FEEL
CONTROL

DRY &
DRY mode
of I FEEL
CONTROL

HEAT &
HEAT mode
of I FEEL
CONTROL

NOTE : When the compressor is OFF, “3-minute time delay circuit” operates.

THERMOSTAT

ON

OFF

ON

OFF

ON ON

OFF

52C CONTACTOR

ON

OFF

OFF for 2 min.after
system

Repeats 8 min. ON/3min. OFF
operation or 2 min. ON/3 min.
OFF operation

Repeates 4 min. OFF/1
min. ON operation

OFF

COIL FROST PREVENTION mode are as follows

MODE

THERMOSTAT

52C CONTACTOR

INDOOR FAN RELAY

AUTO or set speed

AUTO or set

AUTO or set speed links with 52C con­tactor.

AUTO or set speed

VLo speed

INDOOR FAN RELAY

COOL &
COOL mode
of I FEEL
CONTROL

ON

DRY &
DRY mode
of I FEEL
CONTROL

Off for 5 min. After
that, OFF is pro­longed until indoor
coil thermistor reads
termination temper­ature.

Indoor fan relay mode (MSH12NN,MSH15NN)

Indoor fan speed

Hi

Me

Lo

VLo

OFF

Relay turning ON

SR144
SR143
SR142
SR141

All fan relays are off

AUTO or set speed

VLo speed

54

12

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.

12-1 MSH09NW

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.

① Slide the sleeve.
➁ 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) Remove the terminal cover.

Remove the screw of the terminal block.
(4) Remove the cord clamp.
(5) Disconnect the room temperature thermistor and the con-

nector from the indoor coil thermistor.
(6) Remove the screw of the ground wire.
(7) Remove the electronic control P.C. board and the display

P.C. board.

Photo 2

Screw

Room temperature
thermistor connector

Ground wire screw

Cord clamp

Terminal block
cover

Indoor electronic

control P.C.board

Terminal block
cover screw

55

OPERATING PROCEDURE PHOTOS

3. Removing the electrical box

(1) Remove the front panel. (Refer to 1)
(2) Remove the electrical cover.
(3) Remove the electronic control P.C. board and the display

P.C. board.(Refer to 2)
(4) Remove the ground wire of the indoor heat exchanger.
(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 hexagon socket set screws.
(7) Remove the line flow fan and the fan motor.

Photo 3

Photo 4

Vane motor screw

Drain hose

Vane motor

56

Fan motor
catches

Fan motor
fixture

Indoor coil
thermistor

12-2 MSH12NN , MSH15NN, MSH17NN

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.

2. Removing the electronic control P.C. board

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

Remove the electrical cover.

(3) Remove the terminal cover.

Remove the screw of the terminal block.
(4) Unhook the catch of the lamp holder.
(5) Remove the receiver holder.
(6) Disconnect the connectors on the electronic control

P.C. board and remove the ground and the indoor coil ther-

mistor.
(7) Remove the electronic P.C. board.

Photo 1

Photo 2

Ground

Front panel

Screws

Indoor coil thermistor

Screw

Terminal
block
screw

Electronic
control
P.C. board

57

OPERATING PROCEDURE PHOTOS

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

(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 CN121) and

the vane motor connector (CN151) on the electronic con
trol P.C. board.
Remove the ground wire of the indoor heat exchanger.

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

electrical box.

(6) Unhook the catch on the both sides of the nozzle

assembly.
(7) Remove the nozzle assembly.
(8) Remove the screws of the bearing support.
(9) Remove the screw of the heat exchanger and unhook the

catch.

(10) Lifting the heat exchanger, remove the bearing support.
(11) Remove the motor support.
(12) Loose the screw securing the line flow fan, remove the

line flow fan.

(13) 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

58

12-3 MUH09NW

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

Screw for
service panel

Service
panel

Screw for
top plate

Screws for
cabinet

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
propeller 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 securing the fan motor.
(6) Remove the outdoor fan motor.

Photo 2

Screw for
cabinet

Photo 3

propeller fan

Outdoor
fan motor

Set screws for
outdoor fan motor

Propeller fan nut

Screw for
top plate

Lead clamps

59

OPERATING PROCEDURE PHOTOS

3. Removing the compressor

(1) Remove the lead clamps.
(2) Remove the screws securing the relay panel.
(3) Remove the screw securing 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 with a burner.

NOTE

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

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

● Reclain all refrigerant in an environmentally acceptable man­ner.

Photo 4

Terminal cover

compressor Suction pipe

Discharge pipe

60

12-4 MUH12NN , MUH15NN

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

Screw

Screws

2. Removing the electrical parts

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

•Compressor capacitor (C1)

•Outdoor fan connector

•Terminal block

Photo 3

Connector

Compressor capacitor

Terminal block

Screw

61

OPERATING PROCEDURE

PHOTOS

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

4. Removing the compressor

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

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

Photo 4

Propeller fan

Photo 5

Propeller fan nut

Discharge
pipe

Clamp

Connector

Set screw for
outdoor fan motor

NOTE

● Reclaim all refrigerant in an environmentally acceptable man­ner.

Terminal
cover

Compressor
fan

Suction
pipe

Compressor nuts

62

12-5 MUH17NN

Outdoor
controller
board

Transformer

Capacitor

Contactor

Terminal block

Screws

Propeller fan

Motor support

Separator support plate

High-pressure switch

Lead
connectors

Valve bed

Crankcase heater

Propeller nut

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

1. Removing the cabinet and electrical parts

(1) Remove the top panel (3 screws in front, 2 screws in rear)
(2) Remove the cover panel (1 screw).

The panel is anchored by clicks to the side panel.
Remove by pulling towards you.

(3) Remove the cover panel (1 screw).

The panel is anchored by clicks on the right and left sides.
After removing the screw, pull the panel down and remove it
by pulling towards you.

Photo 1

Photo 2

Screws

Front panel

Top panel

Service
panel

Cover
panel

2. Removing the outdoor fan motor

(1) Remove the front panel (3 screws).

Open the panel to a 45 degree angle and lift to remove. The

panel is clasped at three points on the left side.
(2) Remove the propeller fan (1 set nut).
(3) Remove the fan motor (3 screws).

Remove the lead connectors.

Photo 3

63

OPERATING PROCEDURE PHOTOS

Heat exchanger

Accumulator

Charge plug

Ball valve

Compressor

3. Removing the heat exchanger and compressor

(1) Remove the rear panel (2 screws in front, 1 screw on the

side, 3 screws in the rear). Remove the valve bed, and
open the rear panel to the rear to remove.

NOTE :

All panels are clasped, and must be removed by shifting
up and down.

(2) Remove the right side panel (4 screws).
(3) Remove the rear guard (3 screws).
(4) Remove the separator support plate (4 screws).
(5) Remove the motor support (2 screws).
(6) Remove the valve bed (5 screws). The valve bed is

clasped on the right and left sides. Lift to remove.

(7) Remove the electrical parts box.

Remove the respective connectors from highpressure
switch, crank case heater, shell thermo, and fan motor

lead.
(8) Remove the separator (2 screws).
(9) Remove the heat exchanger (2 screws).

Disconnect the welded section of pipe.

(10) Remove the compressor (3 set nuts).

Remove the weldment of the compressor suction pipe and

discharge pipe.

Photo 4

Screws

Photo 5

Screws

64

Photo 6

13

1
2
3
4
5
6

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

Symbol

in Wiring

Diagram

Q'ty/unit

1
1
2
1
1
2

1PC/SET

2PCS/SET

RemarksPart No.

NO.

Part Name

MSH09NW

(WH)
E02 289 000
E02 151 010
E02 164 100
E02 166 234
E02 151 970
E02 166 067

1
2
3

INDOOR HEAT EXCHANGER
UNION(GAS)
UNION(LIQUID)

Symbol

in Wiring

Diagram

Q'ty/unit

1
1
1

{ 3/8
{ 1/4

RemarksPart No.

NO.

Part Name

MSH09NW

(WH)
E02 155 620
E02 155 666
E02 151 667

PARTS LIST

INDOOR UNIT
STRUCTURAL PARTS
MSH09NW (WH)

1

5

6

2

3

4

Optional parts
(See page 74.)

INDOOR UNIT
HEAT EXCHANGER
MSH09NW (WH)

3

2

1

65

INDOOR UNIT

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 289 375
E02 289 450
E02 268 452
E02 268 382
E02 001 504
E02 151 468
E02 268 385

1
2
3
4
5
6
7
8
9

10

11
12
13
14
15
16
17

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
AUTO RESTART
FUSE
SLEEVE BEARING
RECEIVER
VARISTOR

Symbol

in Wiring

Diagram

Q'ty/unit

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

FAN GUARD

2PCS/SET

250V3A

RemarksPart No.

NO.

Part Name

MV
MF

RT11
RT12

TB

F11

NR11

MSH09NW

(WH)

ELECTRICAL PARTS
MSH09NW(WH)

8

15

3

2

7

9

6

5

1

4

10

12

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

66

OUTDOOR UNIT

E02 096 232
E02 085 297
E02 199 521
E02 085 245
E02 289 630
E02 289 900
E02 047 506
E02 289 290
E02 096 662
E02 096 661
E02 289 515
E02 289 936
E02 290 936
E02 289 937
E02 268 351
E02 289 967

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
BASE
STOP VALVE(LIQUID)
STOP VALVE(GAS)
MOTOR SUPPORT
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
OUTDOOR FAN CAPACITOR
REVERSING VALVE

Symbol

in Wiring

Diagram

Q'ty/unit

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

RH-140WGJT
2RUBBER 3SPRING

{ 1/4
{ 3/8

{ 0.12✕{ 0.063✕35-7/16
{ 0.12✕{ 0.55✕11-13/16
{ 0.12✕{ 0.063✕19-11/16

5.0+/250VAC

RemarksPart No.

NO.

Part Name

MC

MUH09NW

STRUCTURAL PARTS
MUH09NW

5

2

1

4

3

11

14

9

10

7

8

6

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

67

OUTDOOR UNIT

E02 085 501
E02 289 301
E02 289 353
E02 289 374
E02 289 310
E02 289 451
E02 289 490

1
2
3
4
5
6
7

PROPELLER FAN
OUTDOOR FAN MOTOR
COMPRESSOR CAPACITOR
TERMINAL BLOCK
DEFROST THERMISTOR
DEICER P.C. BOARD
SOLENOID COIL

Symbol

in Wiring

Diagram

Q'ty/unit

1
1
1
1
1
1
1

70+/220VAC

Remarks

Part No.

NO.

Part Name

MF

C1

TB

RT61

21S4

MUH09NW

FUNCTIONAL PARTS AND ELECTRICAL PARTS
MUH09NW

5

6

1

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

2

4

3

68

INDOOR UNIT

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(WH)

LAMP PANEL(WH)
LAMP PANEL(WH)

Symbol

in Wiring

Diagram

Q'ty/unit

1

1
1
2
1
3
1

1PC/SET

3PCS/SET

RemarksPart No.

NO.

Part Name

MSH12NN

(WH)

1

1
1
2
1
3

1

MSH15NN

(WH)
E02 282 000
E02 283 000
E02 284 000
E02 138 010
E02 143 234
E02 141 100
E02 141 970
E02 143 067
E02 282 007
E02 283 007

E02 284 007

MSH17NN

(WH)

1
1
1
2
1
3

1

E02 141 620
E02 138 667
E02 138 666

1
2
3

INDOOR HEAT EXCHANGER
UNION(LIQUID)
UNION(GAS)

Symbol

in Wiring

Diagram

Q'ty/unit

1

1

1

{1/4
{5/8

RemarksPart No.

NO.

Part Name

MSH12NN,MSH15NN,MSH17NN

(WH)

STRUCTURAL PARTS
MSH12NN (WH)
MSH15NN (WH)

1

MSH17NN (WH)

2

5

3

Optional parts
(See page 74.)

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

INDOOR UNIT
HEAT EXCHANGER PARTS
MSH12NN (WH)
MSH15NN (WH)

MSH17NN (WH)

6

2

4

1

3

69

INDOOR UNIT

E02 138 520
E02 143 040
E02 141 702
E02 270 300
E02 272 300
E02 001 505
E02 268 452
E02 282 450
E02 283 450
E02 284 450
E02 268 382
E02 141 302
E02 141 303
E02 138 329
E02 141 509
E02 282 375
E02 141 468
E02 001 504
E02 138 307
E02 138 308
E02 268 385

1
2
3

4

5
6

7

8

9
10
11
12
13
14
15
16
17
18

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
FUSE
LINE FLOW FAN
VANE MOTOR
DISPLAY P.C. BOARD
BEARING MOUNT
TERMINAL BLOCK
RECEIVER P. C. BOARD
SLEEVE BEARING
INDOOR COIL THERMISTOR
ROOM TEMPERATURE THERMISTOR
VARISTOR

Symbol

in Wiring

Diagram

Q'ty/unit

1
1
1
1

2
1
1

1
1
1
1
1
1
1
1
1
1
1

FAN GUARD

2PCS/SET

250V/3A

RemarksPart No.

NO.

Part Name

MF
MF

F11

MV

TB

RT12
RT11
NR11

MSH12NN

(WH)

1
1
1
1

2
1

1

1
1
1
1
1
1
1
1
1
1
1

MSH17NN

(WH)

MSH15NN

(WH)

1
1
1

1
2
1

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

ELECTRICAL PARTS
MSH12NN (WH)
MSH15NN (WH)
MSH17NN (WH)

15

12

3

11

9

7

5

4

5

16

13

2

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

70

1

10

17

14

OUTDOOR UNIT
STRUCTURAL PARTS
MUH12NN
MUH15NN

1

17

19

18

12

8

10

4

21

15

2

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

E02 141 232

1

E02 141 521

2

E02 270 245

3

E02 139 630

4

E02 283 630
E02 139 515

5

E02 271 900

6

E02 282 900
E02 156 290

7

E02 270 301

8

E02 141 501

9

E02 271 353

10

E02 282 340

11

E02 282 374

12

E02 285 936
E02 283 936

13

E02 282 936
E02 282 937
E02 075 506

14

E02 139 662

15

E02 150 661

16

E02 270 233

17

E02 282 451

18

E02 139 310

19

E02 172 490

20

E02 282 961

21

CABINET
GRILLE
SERVICE PANEL
OUTDOOR HEAT EXCHANGER
OUTDOOR HEAT EXCHANGER
MOTOR SUPPORT
COMPRESSOR
COMPRESSOR
BASE
OUTDOOR FAN MOTOR
PROPELLER FAN
COMPRESSOR CAPACITOR
COMPRESSOR CONTACTOR
TERMINAL BLOCK
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
COMPRESSOR RUBBER SET
STOP VALVE(LIQUID)
STOP VALVE(GAS)
BACK PANEL
DEICER P.C. BOARD
DEFROST THERMISTOR
SOLENOID COIL
REVERSING VALVE

9

Symbol

in Wiring

Diagram

MC
MC

MF

C1

52C

TB

RT61

21S4

5

14

MUH12NN

6

1
1
1
1

1

1
1
1
1
1
1
1
1

2
1
3
1
1
1
1
1
1
1

7

Q'ty/unit

16

MUH15NN

1
1
1

1
1
1

1
1
1
1
1
1

1
2
1
3
1
1
1
1
1
1
1

3

RemarksPart No.NO. Part Name

RH-207NHDT
RH-185NHDT

30+/370VAC

{0.12✕{0.071✕19-11/16
{0.12✕{0.079✕23-5/8
{0.12✕{0.055✕11-13/16
{0.12✕{0.079✕7-7/8

3RUBBER

{1/4
{5/8





71

OUTDOOR UNIT
STRUCTURAL PARTS
MUH17NN

1

3 8 11 4

2

16

19

18 21

5

14

13

2015

17

72

6

10

9

7

OUTDOOR UNIT

E02 214 232

E02 214 297

E02 214 521

E02 214 245

E02 284 630

E02 272 900

E02 075 506

E02 284 290

E02 284 662

E02 010 661

E02 214 515

E02 138 936

E02 257 936

E02 214 501

E02 284 301

E02 272 353

E02 282 374

E02 214 310

E02 282 451

E02 172 490

E02 282 961

E02 282 340

1
2
3
4
5
6
7
8

9
10
11

12
13

14
15
16
17
18
19
20
21

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

{0.12✕{0.079✕9-13/16

)
PROPELLER FAN
OUTDOOR FAN MOTOR
COMPRESSOR CAPACITOR
TERMINAL BLOCK
DEFROST THERMISTOR
DEICER P.C. BOARD
SOLENOID COIL
REVERSING VALVE
COMPRESSOR CONTACTOR

Symbol

in Wiring

Diagram

Q'ty/unit

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

RH-231NHDT
3RUBBER


{1/4
{3/8

{0.12✕{0.079✕27-9/16
{0.12✕{0.079✕19-11/16

35+/370VAC

RemarksPart No.NO. Part Name

MC

MF
C1
TB

RT61

21S4

MUH17NN

E02 141 426
E02 141 083

1
2

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

Symbol

in Wiring

Diagram

Q'ty/unit

1
1

RemarksPart No.NO. Part Name

MSH09NW

(WH)

1
1

MSH12/15/17NN

(WH)

STRUCTURAL PARTS
MUH17NN

ACCESSORY AND REMOTE CONTROLLER PARTS
MSH09NW (WH)
MSH12NN (WH)
MSH15NN (WH)
MSH17NN (WH)

2

1

73

14

MAC - 440PI

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

0

5

0

5

13

C 13/16

D1-1/16

C 1-7/32

D 1-1/16

1/4

3/8

5/8

10ft

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

MSH09NW

Applicable

Model

Part No.

Pipe size O.D

Pipe length

Cross-section A-Gas(in.) B-Liquid(in.) Insulation(in.)

Additional
refrigerant

charge

R-22(Oz)

MSH12NN
MSH15NN
MSH17NN

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 MSH09NW

MAC-1100FT MSH12NN,MSH15NN,MSH17NN

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

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

74

MAC-1500DF MSH09NW

MAC-1600DF

MSH12NN,MSH15NN,MSH17NN

CC

Copyright 1997 MITSUBISHI ELECTRIC ENGINIEERING CO.,LTD

Issued in Jul. 1997. No.OB198 5042

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

3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024

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

Specifications are subject to change without notice.

www.mrslim.com