Mitsubishi MSH-07NV - E1WH, MSH-07NV - E1, MUH-07NV -E1, MSH-09NV - E1WH, MSH-09NV

This Servise Manual OB207 deals with MSH-07/09/12/18/24NV-E1, MUH-07/09/12/18/24NV-E1, MSH-18NV-E2, and MUH-18NV-E2 in OB176 REVISED EDITION-A issued in July in1997. Therefore, please refer to OB207, not to OB176 REVISED EDITION-A, for the above models.

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

Wireless type Models

MSH-07NV MSH-09NV MSH-12NV MSH-18NV MSH-24NV MSH-07NV MSH-09NV MSH-12NV MSH-18NV MSH-24NV MSH-18NV -

(WH)

· MUH-07NV -

· MUH-09NV -

· MUH-12NV -

· MUH-18NV -

· MUH-24NV -

· MUH-07NV -

· MUH-09NV -

· MUH-12NV -

· MUH-18NV -

· MUH-24NV -

· MUH-18NV -

No. OB207

E1E1

E2E2

E3E3

MSH-18NV MSH-18NV MSH-18NV -

Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- , and MSH-18NVare connected with MXZ-32NV- as multi system units.

E1 E2 E3

CONTENTS

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

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

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

4. OUTLINES AND DIMENSIONS ······················ 11

5. WIRING DIAGRAM ··········································15

6. REFRIGERANT SYSTEM DIAGRAM··············24

7. PERFORMANCE CURVES······························29

8. MICROPROCESSOR CONTROL ····················33

9. SERVICE FUNCTIONS ····································44

10. TROUBLESHOOTING······································47

11. DISASSEMBLY INSTRUCTIONS·····················60

12. PARTS LIST······················································70

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

E3E2E1

E1

1

TECHNICAL CHANGES

MSH-17NV - ➔MSH-07NV -

1. Indoor electronic control P.C.board has changed. However, it is compatible between and models.

2. Auto restart function is added.

MSH-09NV - ➔MSH-09NV -

1. Indoor electronic control P.C.board has changed. However, it is compatible between and models.

2. Auto restart function is added.

MSH-12NV - ➔MSH-12NV -

1. Indoor electronic control P.C.board has changed. However, it is compatible between and models.

2. Auto restart function is added.

MSH-18NV - ➔MSH-18NV -

1. Indoor electronic control P.C.board has changed. However, it is compatible between and models.

2. Auto restart function is added.

MSH-24NV - ➔MSH-24NV -

1. Indoor electronic control P.C.board has changed. However, it is compatible between and models.

2. Auto restart function is added.

E2E1

E3E2

E2E1

2

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSH-07NV - MSH-07NV MSH-09NV - MSH-09NV MSH-12NV - MSH-12NV -

E1

E2

MSH-18NV MSH-24NV MSH-18NV MSH-24NV MSH-18NV -

E1

E2

E3

(When the front panel is open) MSH-07NV - MSH-09NV - MSH-12NV MSH-07NV - MSH-09NV - MSH-12NV -

MSH-18NV - MSH-24NV - MSH-18NV MSH-24NV - MSH-18NV -

E3E2

OUTDOOR UNIT

MUH-07NV MUH-09NV MUH-07NV MUH-09NV -

E1

E2

MSH-07NV - MSH-09NV - MSH-12NV -

E1E1E1

MSH-07NV - MSH-09NV - MSH-12NV -

E2E2E2

MSH-18NV - MSH-24NV - MSH-18NV MSH-24NV - MSH-18NV -

E2E1E1

MUH-12NV MUH-18NV MUH-18NV MUH-18NV -

E1E1E1 E2E2E2

E2E1E1

E3E2

E1

E2

E3

MUH-24NV MUH-24NV -

E1

E2

3

MSH-07NV - MSH-09NV - MSH-12NV - MSH-18NV - MSH-18NV -

REMOTE CONTROLLER

E2E1E1E1E1

4

MSH-07NV - (Serial number 7000201T~) MSH-09NV - (Serial number 7000201T~) MSH-12NV - (Serial number 7000001T~) MSH-24NV MSH-07NV - MSH-09NV MSH-12NV - MSH-18NV - (Serial number 7000001T~) MSH-24NV - MSH-18NV -

E1E1

E2E2

E3E2

5

3

Capacity

Electrical data

Compressor

Indoor

fan motor

Outdoor

fan motor

Dimensions

Weight

Special remarks

Model

Function

Power supply

Coefficient of performance(C.O.P)

Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compressor motor current Fan motor current

Model Output Winding resistance(at20:) Model Winding resistance(at20:) Model Winding resistance(at20:)

Indoor unit

Outdoor unit

Indoor unit Outdoor unit Air direction Sound level (Hi) Fan speed (Hi) Fan speed regulator Refrigerant filling capacity(R-22)

Thermistor

Width Height Depth Width Height Depth

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

RT11(at25:) RT12(at25:) RT61(at0:)

kW

R/h

K /h

A A

W

A(kW)

%

A A A

W

"



"

mm mm mm mm mm mm

kg kg

dB

dB rpm rpm

kg k" k" k"

MSH-07NV -

E1 E2

Single phase,220-240V,50Hz

INDOOR 492 OUTDOOR 1620

10

98-98

25

INDOOR 0.17 OUTDOOR 0.33

RH-135VGHT

650

C-R4.17 C-S5.75

RC4V19-AA

WHT-BLK292 BLK-RED324

RA6V29-CB

WHT-BLK218.0 BLK-RED423.7

815 275 183 780 540 255

8

34

5 37 47

1,100

790-820

4

1

0.85 10 10

33.18

MSH-09NV -

E1 E2

Single phase,220-240V,50Hz

INDOOR 492 OUTDOOR 1620

10

25

INDOOR 0.17 OUTDOOR 0.33

RH-174VGHT

800

C-R3.26 C-S5.82

RC4V19-AA

WHT-BLK292 BLK-RED324

RA6V29-CB

WHT-BLK218.0 BLK-RED423.7

815 275 183 780 540 255

8

34

5 37 48

1,100

790-820

4

1

0.85 10 10

33.18

Cooling

2.2

0.8

3.30-3.20 710-750

—

2.80-2.70

3.10-2.93

Heating

2.5 —

3.15-3.05 680-720

—

2.65-2.55

3.68-3.47

Cooling

2.5

1.1

4.10-4.00 880-920

—

98-96

3.60-3.50

2.84-2.72

Heating

3.1 —

4.30-4.10 920-940

—

97-96

3.80-3.60

3.37-3.30

SPECIFICATION

NOTE:Test conditions

6

Cooling : Indoor DB27°C / WB19°C

Outdoor DB35°C / WB24°C

Heating : Indoor DB20°C /WB15.5°C

Outdoor DB 7°C / WB 6°C

Model

Function

Power supply

Capacity

Dehumidification Air flow Power outlet Running current Power input Auxiliary heater

Electrical data

Power factor Starting current Compressor motor current Fan motor current

Coefficient of performance(C.O.P)

Model

Compressor

Output Winding resistance(at20:)

Indoor

fan motor

Outdoor

fan motor

Model Winding resistance(at20:) Model Winding resistance(at20:)

Indoor unit

Dimensions

Outdoor unit

Weight

Indoor unit Outdoor unit Air direction Sound level (Hi) Fan speed (Hi)

Special remarks

Fan speed regulator Refrigerant filling capacity(R-22)

Thermistor

Width Height Depth Width Height Depth

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

RT11(at25:) RT12(at25:) RT61(at0:)

MSH-12NV -

Cooling

E1 E2

Heating

Single phase,220-240V,50Hz

kW

R/h

K /h

A A

W

A(kW)

%

A A A

3.4

1.6

INDOOR 558 OUTDOOR 2130-2244

10

5.75-5.90

1220-1300

5.95-6.10

1260-1350

—

96-92

35

5.21-5.36

5.41-5.56

INDOOR 0.17 OUTDOOR 0.37

2.78-2.61

3.17-2.96

RH-231VHAT

W

"

1100

C-R2.1 C-S3.9

RC4V19-AA

"

WHT-BLK292 BLK-RED324



"

mm mm mm mm mm mm

kg kg

RA6V40-EC or EE

WHT-BLK130 BLK-RED134.6

815 275 183 850 605 290

8

43

5 dB dB

rpm rpm

42 50

1230

780-820

4

1

kg k" k" k"

1.15 10 10

33.18

4.0 —

—

MSH-18NV -

Cooling

E1 E2 E3

Heating

Single phase,220-240V,50Hz

5.1

2.5

5.4 —

INDOOR 756 OUTDOOR 2142

15

9.4-9.2

2030-2120

—

98-96

9.2-9.0

1980-2070

—

98-96

52-58

8.76-8.56

8.56-8.36

INDOOR 0.25 OUTDOOR 0.39

2.51-2.41

2.73-2.61

NH-36VMDT

1700

C-R1.2 C-S2.7

RA4V27-EA

WHT-BLK183.8 BLK-RED250.5

RA6V50-OD or OF

WHT-BLK116.4 BLK-RED111.0

1015

320 190 850 605 290

14 59

5 42 52

1180

810-845

4

1

1.8 10 10

33.18

NOTE:Test conditions

Cooling : Indoor DB27°C / WB19°C

Outdoor DB35°C / WB24°C

Heating : Indoor DB20°C /WB15°.5C

Outdoor DB 7°C / WB 6°C

7

Capacity

Electrical data

Compressor

Indoor

fan motor

Outdoor

fan motor

Dimensions

Weight

Special remarks

Model

Function

Power supply

Coefficient of performance(C.O.P)

Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compressor motor current Fan motor current

Model Output Winding resistance(at20:) Model Winding resistance(at20:) Model Winding resistance(at20:)

Indoor unit

Outdoor unit

Indoor unit Outdoor unit Air direction Sound level (Hi) Fan speed (Hi) Fan speed regulator Refrigerant filling capacity(R-22)

Thermistor

Width Height Depth Width Height Depth

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

RT11(at25:) RT12(at25:) RT61(at0:)

kW

R/h

K /h

A A

W

A(kW)

%

A A A

W

"



"

mm mm mm mm mm mm

kg kg

dB

dB rpm rpm

kg k" k" k"

MSH-24NV -

E1 E2

Cooling Heating

Single phase,220-240V,50Hz

6.0 6.2

3.1 — 816

25

12.6-11.7 11.5-11.0 2720-2750 2470-2580

— 98 59

11.73-10.83 10.63-10.13

INDOOR 0.29 OUTDOOR 0.58

2.21-2.18 2.51-2.40 NH-47VMDT

2200

C-R 0.96 C-S 2.07

RA4V27-EC

WHT-BLK183.8 BLK-RED250.5

RA6V85-AA

WHT-BLK62.7 BLK-YLW30.2 YLW-RED62.9

1015

320 190 870 850 295

14 72

5 45 53

1,260

720-750

4

2

2.4 10 10

33.18

NOTE:Test conditions

Cooling : Indoor DB27°C / WB19°C Heating : Indoor DB20°C /WB15.5°C

Outdoor DB35°C / WB24°C Outdoor DB 7°C / WB 6°C

8

Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- , and MSH-18NV- are connected with MXZ-32NV- as multi system units.

Capacity

Electrical data

Coefficient of performance(C.O.P)

Compressor

Indoor

fan motor

Outdoor

fan motor

Dimensions

Weight

Special remarks

NOTE:Test conditions

Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compressor motor current Fan motor current

Model Output Winding resistance(at20:) Model Winding resistance(at20:) Model Winding resistance(at20:)

Indoor unit

Outdoor unit

Indoor unit Outdoor unit Air direction Sound level (Hi) Fan speed (Hi) Fan speed regulator Refrigerant filling capacity(R-22)

Thermistor

E1

Model

Function

Power supply

Width Height Depth Width Height Depth

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

RT11(at25:) RT12(at25:) RT61(at0:)

MSH-07NV- (INDOOR UNIT)

E1 E2 E1 E2

Cooling Heating

Single phase,220-240V,50Hz

kW

R/h

K /h

A A W

A(kW)

% A A A

— — — —

492

10

0.17 35

—

94-86

— —

0.17

— —

W

"

— —

RC4V19-AA

"

WHT-BLK292 BLK-RED324



"

mm mm mm mm mm mm

kg kg

—

— 815 275 183

—

8

—

5 dB dB

rpm rpm

37

—

1,100

—

4

— kg k" k" k"

—

10 10

—

Please refer to Service manual OB185 for capacity.

MSH-09NV- (INDOOR UNIT)

Cooling Heating

Single phase,220-240V,50Hz

— — — —

492

10

0.17 35

—

94-86

— —

0.17

— — — —

RC4V19-AA

WHT-BLK292 BLK-RED324

—

— 815 275 183

—

8

—

5

37

—

1,100

—

4 — —

10 10

—

E3E2E1

Cooling : Indoor DB27°C / WB19°C

Outdoor DB35°C / WB24°C

Heating : Indoor DB20°C /WB15.5°C

Outdoor DB 7°C / WB 6°C

9

Capacity

Electrical data

Compressor

Indoor

fan motor

Outdoor

fan motor

Dimensions

Weight

Special remarks

Model

Function

Power supply

Coefficient of performance(C.O.P)

Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compressor motor current Fan motor current

Model Output Winding resistance(at20:) Model Winding resistance(at20:) Model Winding resistance(at20:)

Indoor unit

Outdoor unit

Indoor unit Outdoor unit Air direction Sound level (Hi) Fan speed (Hi) Fan speed regulator Refrigerant filling capacity(R-22)

Thermistor

Width Height Depth Width Height Depth

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

RT11(at25:) RT12(at25:) RT61(at0:)

kW

R/h

K /h

A A

W

A(kW)

%

A A A

W

"



"

mm mm mm mm mm mm

kg kg

dB

dB rpm rpm

kg k" k" k"

MSH-12NV- (INDOOR UNIT)

Cooling Heating

Single phase,220-240V,50Hz

— —

—

558

10

0.17 35

—

94-86

— —

0.17

— — — —

RA4V19-AA

WHT-BLK292 BLK-RED324

—

— 815 275 183

—

8

—

5

42

—

1,230

—

4 — —

10 10

—

MSH-18NV- (INDOOR UNIT)

Cooling Heating

Single phase,220-240V,50Hz

— —

—

756

10

0.28 60

—

97-89

— —

0.25

— — — —

RA4V27-EA

WHT-BLK184 BLK-RED251

— —

1015

320 190

— — —

14

—

5

42

—

1,180

—

4 — —

10 10

—

Please refer to Service manual OB185 for capacity.

E1 E2 E2 E3

Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- , and MSH-18NV- are connected with MXZ-32NV- as multi system units.

E1

E3E2E1

NOTE:Test conditions

Cooling : Indoor DB27°C / WB19°C

Outdoor DB35°C / WB24°C

Heating : Indoor DB20°C /WB15.5°C

Outdoor DB 7°C / WB 6°C

10

4

OUTLINES AND DIMENSIONS

MSH-07NV - MSH-09NV - MSH-07NV - MSH-09NV -

INDOOR UNIT

Unit: mm

E2E2E1E1

MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV -

OUTDOOR UNIT

E2E2E1E1

11

MSH-12NV - MSH-12NV -

INDOOR UNIT

E2E1

Unit: mm

9.52

MUH-12NV - MUH-12NV -

OUTDOOR UNIT

E2E1

If the right/left sides or back side is vacant,the front has only to be 50cm unobstructed.

If the front or right/left sides

are vacant, the top has only

to be 10cm unobstructed.

12

MSH-18NV - MSH-24NV - MSH-18NV - MSH-24NV - MSH-18NV -

33 297297

450450 450450

352352438438

254254

2020

6060

4040

150150 648648 217217

55190190

995995

1901907757755050

320320

10151015

17.517.5

160160

5656

4holes 14holes 111✕✕2020

Indoor unitIndoor unit

Installation plateInstallation plate

Power supply cordPower supply cord Lead to right 2mLead to right 2m Lead to left 1mLead to left 1m

WWall hole all hole [[7575

Installation plateInstallation plate

Liquid line Liquid line [[8-0.5m8-0.5m Gas line Gas line [[12-0.43m12-0.43m Insulation Insulation [[50 O.D50 O.D

[ [28 I.D28 I.D

Insulation Insulation [[2828

Drain hose Drain hose [[1616

Air outAir out

{

Air inAir in

If the right/left sides or back side is vacant,the front has only to be 50cm unobstructed.

If the front or right/left sides

are vacant, the top has only

to be 10cm unobstructed.

INDOOR UNIT

Unit: mm

E3E2E2E1E1

MUH-18NV - MUH-18NV - MUH-18NV -

E3E2E1

OUTDOOR UNIT

13

150

500

10

362(14-1/4)

39.5 27.5

Air outlet

E2E1

Service space

500

Terminal block for indoor and outdoor unit connection

Terminal block for power line

870(34-1/4)

302

Service panel

Ground

terminal

Handle for moving

4553

Knock out holes for

60

Refrigerant-pipe flared

connection [15.88 5/8F

Refrigerant-pipe flared

connection [9.52 3/8F

850(33-7/16)

553

403

441

352

337

Knock out hole

179 524

40 60524

for front piping

power line 2-[27

120

(refrigerant,drainage

and wiring)

104

2-12✕23 Oval holes

R20

Knock out hole

for right piping

(refrigerant,drainage

and wiring)

45 42

33

(standard bolt M10)

Drain hole

Bottom

piping hole

25 max.

Standard bolt length

80

65

Front right piping holes-

17

R6

2-U-shaped

notched

holes

Drain hole

detail figures

12

MUH-24NV- MUH-24NV- Unit : mm (inch)

200

Note:Allow adequate

upper clearance

10

Front opening

10

Outdoor Unit-Necessary surrounding clearance

1715

185

(7-9/32)

Air intake

500(19-11/16)

185

(7-9/32)

330(13)

Air intake

14

7 24(1)295(11-5/8)

200

1000For 10 units or less

The upper side must be open.

Outdoor Unit-Necessary surrounding clearance

(Concentrated installation)

100 10

Outlet guide

installation hole

Side air intake

Handle

for moving

Handle for moving

Rear fresh

air intake

33

23

Rear piping hole

95

138

5

❈

~/N

~

TO OUTDOOR UNIT CONNECTING

12VDC

L 3 2 N

;

FOR MULTI SYSTEM

WIRING DIAGRAM

MSH-07NV MSH-09NV -

E1

MODELS WIRING DIAGRAM

INDOOR UNIT

SYMBOL

C11 F12 F11

MF

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

INDOOR FAN CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR

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

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

MUH-07NV MUH-09NV -

NAME

E1

MODELS WIRING DIAGRAM

SYMBOL

NR11 RT11 RT12

52C

VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR CONTACTOR

NAME NAME

SYMBOL

TB

MV

SR11

TERMINAL BLOCK VANE MOTOR SOLID STATE RELAY

OUTDOOR UNIT

SYMBOL

C1 C65 52C F61

MC

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

COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR CONTACTOR FUSE(2A) COMPRESSOR(INNER THERMOSTAT)

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

❈

SYMBOL

MF

NR61

RT61 SR61

TB

❈

NAME NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

SYMBOL

X62

21S4

IC881

❈❈

REVERSING VALVE COIL RELAY REVERSING VALVE COIL DC/DC CONVERTER

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

15

MSH-12NV -

E1

MODEL WIRING DIAGRAM

INDOOR UNIT

~/N

FOR MULTI SYSTEM

TO OUTDOOR UNIT CONNECTING

SYMBOL

C11 F12 F11

MF

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

INDOOR FAN CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR

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

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

NAME

~

12VDC

❈ ❈

❈

L 3 2 N

;

SYMBOL

NR11

RT11

RT12

52C

NAME NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR CONTACTOR

❈

SYMBOL

TB

MV

SR11

TERMINAL BLOCK VANE MOTOR SOLID STATE RELAY

E1

MUH-12NV -

MODEL WIRING DIAGRAM

OUTDOOR UNIT

❈

SYMBOL

COMPRESSOR CAPACITOR

C1 C65 52C F61

MC

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

OUTDOOR FAN MOTOR CAPACITOR CONTACTOR FUSE(2A) COMPRESSOR(INNER THERMOSTAT)

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

NAME

SYMBOL

16

MF

NR61

RT61 SR61

TB

❈

❈ ❈

OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

NAME NAME

SYMBOL

X62

21S4

IC881

REVERSING VALVE COIL RELAY REVERSING VALVE COIL DC/DC CONVERTER

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

MSH-18NV -

E1

MODEL WIRING DIAGRAM

INDOOR UNIT

SYMBOL

C11 F12 F11

MF

MV

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

INDOOR FAN CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR VANE MOTOR

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

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

NAME

❈ ❈

SYMBOL

NR11 RT11 RT12

IC141

52C

VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR HYBRID IC CONTACTOR

❈

NAME NAME

SYMBOL

TB

DSAR

HIC1

TERMINAL BLOCK SURGE ABSORBER DC/DC CONVERTER

E1

MUH-18NV -

MODEL WIRING DIAGRAM

OUTDOOR UNIT

❈

SYMBOL

C1

C65

DSAR

F61

MC

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

COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR SURGE ABSORBER FUSE(2A) COMPRESSOR<INNER THERMOSTAT>

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

❈

SYMBOL

MF NR61 RT61 SR61

TB

NAME NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

SYMBOL

X62

21S4

52C

REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

17

MSH-24NV -

INDOOR UNIT

E1

MODEL WIRING DIAGRAM

220-240V~ 220-240V~

TO OUTDOOR UNIT CONNECTING

POWER SUPPLY CORD ~/N 220-240V 50Hz

TB

3

RED

❈

2

WHT

❈

L

BRN

N

❈

BLU

CIRCUIT BREAKER

BLU

RECEIVER P.C.BOARD

F12

NF

2 1

BLU

3

CN201

4

3 1

WHT

CN

101CN102

3 3

151

MV

DISPLAY P.C.BOARD

ELECTRONIC CONTROL P.C BOARD

5

GRN/YLW

REMOTE CONTROLLER

SYMBOL

C11 F12 F11

MF

MV

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

INDOOR FAN MOTOR CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR VANE MOTOR

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

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

NAME

SYMBOL

NR11 RT11 RT12

IC141

52C

NAME NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR HYBRID IC CONTACTOR

❈

4

3

52C

HIC1

TRANS

F11

SYMBOL

TB

HIC1

NF

CN

IC141

NR11

112 CN

111

3

CN 121

CN211

4

C11

2 1

TERMINAL BLOCK DC/DC CONVERTER NOISE FILTER

BRN YLW GRY WHT RED BLK

RT12

RT11

MF

E1

MUH-24NV -

OUTDOOR UNIT

SYMBOL

COMPRESSOR CAPACITOR

C1

OUTDOOR FAN MOTOR CAPACITOR

C2

SURGE ABSORBER 1

DSAR

FUSE(2A)

F61

COMPRESSOR<INNER THERMOSTAT>

MC

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

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

MODEL WIRING DIAGRAM

6

1

YLW

5

BLK

4

3

WHT

12VDC

220-240V~

UNIT

TO INDOOR

CONNECTING

SYMBOL

MF NR61 RT61 SR61

TB. TB2

MF

TB

3

❈ ❈

2

F

WHT

N

❈

GRN/YLW

OUTDOOR FAN MOTOR

VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

3

ORN

2

RED

1

RED

WHT

ORN

RED

TB2

26F1

BLU

WHT

DSAR

VLT

WHT

BLU

NAME NAME

X1

5

C2

7

RED

8

BLU

VLT

52C1

CR

SYMBOL

X62

21S4

52C

52C1

X1

CN730

3 2 1

❈

X1

TAB20

YLW

WHT

REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR COMPRESSOR CONTACTOR FAN MOTOR RELAY

BRN

3

CZ

52C1

1

CN711

52C

❈

4

2

C1

❈

WHT

RED BLK

1 2 3

F61

WHT

S

RT61

4

CN661

SR61

IC881

TRANS

DEICER P.C. BOARD

C

MC

R

SYMBOL

21S4

BLK

CN721

X62

NR61

NAME

FUSE(2A)

F

THERMOSTAT (AIR FLOW CONTROL)

26F1

DC/DC CONVERTER

IC881

SURGE ABSORBER 2

CR

SURGE ABSORBER 3

CZ

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

18

MSH-07NV - MSH-09NV - MSH-12NV -

INDOOR UNIT

TO OUTDOOR UNIT CONNECTING

12VDC

220-240V~

POWER SUPPLY CORD ~/N 220-240V

50Hz

CIRCUIT BREAKER

TO OUTDOOR UNIT CONNECTING

TB

L 3

2 N

FOR MULTI SYSTEM

12VDC

❈

BRN

❈ ❈

❈

BLU

GRN/YLW

L 3 2 N

BRN

WHT

BLU

RED

F12

GUARD PLATE

GRN/YLW

POWER MONITOR, RECEIVER P.C.BOARD

BLU

1

BLU

2

1

CN 122

LD101

REMOTE CONTROLLER

BLU

CN

151

ELECTRONIC CONTROL P.C BOARD

5

MV

E2E2E2

CN201

3 2 1

MODELS WIRING DIAGRAM

SR11

HIC1

❈

3

52C

❈

4

NR11

TRANS

F11

C11

CN 112

CN 111

CN 121

3 2 1

CN211

3

BLK

GRY

YLW BRN

WHT RED

RT12 RT11

1 2 3

MF

4 5 6

SYMBOL

C11 F12

F11

MF

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

INDOOR FAN MOTOR CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR

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

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

MUH-07NV - MUH-09NV -

OUTDOOR UNIT

NAME

TO INDOOR

UNIT

CONNECTING

12VDC

220-240V~

SYMBOL

NR11

RT11

RT12

52C

E2E2

TB

3

❈

RED

2

❈

N

❈

NAME NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR CONTACTOR

MODELS WIRING DIAGRAM

RT61

CN661

X62

F61

1

CN730

TRANS

52C

4

NR61

3

❈

DEICER P.C. BOARD

IC881

BLU

TAB20

WHT

❈

21S4

BLK

CN721

BLU

GRN/YLW

BLK

SR61

X62

SYMBOL

TB HIC1 SR11

MV

C65

CN711

C1

TERMINAL BLOCK DC/DC CONVERTER SOLID STATE RELAY VANE MOTOR

MF

RED

1

WHT

2 3

BLK

4

WHT

❈❈

RED

BLK

MC

S

C

R

SYMBOL

COMPRESSOR CAPACITOR

C1

FUSE(2A)

F61

COMPRESSOR<INNER THERMOSTAT>

MC

SOLID STATE RELAY

SR61

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

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

SYMBOL

OUTDOOR FAN MOTOR

MF

VARISTOR

NR61

DEFROST THERMISTOR

RT61

NAME NAME

SYMBOL

X62

21S4

52C

REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR

SYMBOL

C65

IC881

TB

NAME FAN MOTOR CAPACITOR DC/DC CONVERTER TERMINAL BLOCK

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

19

MUH-12NV -

E2

OUTDOOR UNIT

MODEL WIRING DIAGRAM

TB

GRN/YLW

3

N

RED

❈

WHT

❈

BLU

❈

12VDC

220-240V~2

TO

INDOOR UNIT

CONNECTING

RT61

CN661 CN721

1

CN730

F61

IC881

❈

TAB20

❈

BLU

TRANS

52C

4

21S4

BLK

X62

NR61

❈

3

DEICER P.C.BOARD

C1

RED

BLK

SR61

X62

WHT

C65

CN711

MC

S

MF

RED

C

WHT

BLK

R

1 2 3 4

ORN

WHT BLK

1 2 3 4

SYMBOL

COMPRESSOR CAPACITOR

C1

FUSE(2A)

F61

COMPRESSOR<INNER THERMOSTAT>

MC

SOLID STATE RELAY

SR61

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

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

SYMBOL

MF

NR61

RT61

NAME NAME

OUTDOOR FAN MOTOR

VARISTOR DEFROST THERMISTOR

SYMBOL

X62

21S4

52C

REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR

SYMBOL

C65

IC881

TB

NAME FAN MOTOR CAPACITOR DC/DC CONVERTER TERMINAL BLOCK

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

20

MSH-18NV -

INDOOR UNIT

E2

MODEL WIRING DIAGRAM

❈

❈ ❈ ❈

~/N

FOR MULTI SYSTEM

TO OUTDOOR UNIT CONNECTING

SYMBOL

C11 F12

F11

MF

MV

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

INDOOR FAN CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR VANE MOTOR

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

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

MUH-18NV -

NAME

E2

MODEL WIRING DIAGRAM

12VDC

L 3 2 N

;

SYMBOL

NR11

RT11 RT12

IC141

52C

NAME NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR HYBRID IC CONTACTOR

OUTDOOR UNIT

❈

SYMBOL

TB

DSAR

HIC1

TERMINAL BLOCK SURGE ABSORBER DC/DC CONVERTER

❈

SYMBOL

MF

NR61

RT61

SR61

TB

❈

NAME NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

❈

SYMBOL

C1

C65

DSAR

F61

MC

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

COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR SURGE ABSORBER FUSE(2A) COMPRESSOR<INNER THERMOSTAT>

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

SYMBOL

X62

21S4

52C

IC881

REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR DC/DC CONVERTER

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

21

MSH-24NV -

INDOOR UNIT

E2

MODEL WIRING DIAGRAM

220-240V~ 220-240V~

TO OUTDOOR UNIT CONNECTING

POWER SUPPLY CORD ~/N 220-240V 50Hz

TB

3

RED

❈

2

WHT

❈

L

N

❈

BLU

BRN

BLU

CIRCUIT BREAKER

GRN/YLW

F12

2 1

RECEIVER P.C.BOARD

REMOTE CONTROLLER

CN

101

NF

3 3

3

4

CN 102

DISPLAY P.C.BOARD

HIC1

BLU

CN201

3 1

CN

151

ELECTRONIC CONTROL P.C BOARD

WHT

4

52C

❈

3

TRANS

F11

5

MV

IC141

NR11

CN 112

CN 111

CN 121

CN211

4

C11

2 1

RT12 RT11

3

BRN YLW GRY

MF

WHT

RED BLK

SYMBOL

C11 F12 F11

MF

MV

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

INDOOR FAN CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR VANE MOTOR

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

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

MUH-24NV -

OUTDOOR UNIT

NAME

SYMBOL

NR11

RT11

RT12

IC141

52C

E2

MODEL WIRING DIAGRAM

MF

TB

12VDC

220-240V~

TO INDOOR

UNIT

CONNECTING

3

❈

2

❈

WHT

N

❈

GRN/YLW

NAME NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR HYBRID IC CONTACTOR

X1

6

1

YLW

RED

F

ORN

BLU

WHT

DSAR

YLW BLK

WHT

ORN

RED

TB2

5 4 3 2 1

BLK WHT ORN RED

WHT

26F1

3

A1

VLT

WHT

BLU

5

C2

BLU

VLT

8RED 7

52C1

CR

X1

YLW

A2

WHT

BRN

CN730

3 2 1

❈

TAB20

YLW

3

1 2

C1

❈

CZ

52C1

CN711

52C

4

❈

WHT

RED

BLK

SYMBOL

TB NF

HIC1

1 2 3

SR61

F61

WHT

MC

S

TERMINAL BLOCK NOISE FILTER DC/DC CONVERTER

RT61

21S4

BLK

CN721

CN661

4

X62

IC881

NR61

TRANS

DEICER P.C. BOARD

C

R

SYMBOL

COMPRESSOR CAPACITOR

C1

FAN MOTOR CAPACITOR

C2

DSAR

CR

F61

MC

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

SURGE ABSORBER 1 SURGE ABSORBER 2 SURGE ABSORBER 3

CZ

FUSE(2A) COMPRESSOR<INNER THERMOSTAT>

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

22

SYMBOL

MF

NR61

RT61 SR61

TB,TB2

F

26F1

NAME NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

SYMBOL

X62

21S4

52C

52C1

IC881 FUSE(2A) THERMOSTAT (AIR FLOW CONTROL)

REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR COMPRESSOR CONTACTOR DC/DC CONVERTER FAN MOTOR RELAY

X1

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

MSH-18NV -

INDOOR UNIT

E3

MODEL WIRING DIAGRAM

TO OUTDOOR UNIT CONNECTING

12VDC 220-240V~

POWER SUPPLY CORD ~/N 220-240V 50Hz

CIRCUIT BREAKER

TO OUTDOOR UNIT CONNECTING

TB

L 3

2

N

FOR MULTI SYSTEM

12VDC

❈

BRN

❈ ❈

❈

BLU

L 3 2 N

BRN

WHT

BLU

F12

RED

BLU BLU

BRN

GRN/YLW

DSAR

GRN/YLW

RECEIVER P.C.BOARD

REMOTE CONTROLLER

2 1

LD1

CN CN 101

102

❈

4

CN201

BLU

3 1

CN 151

ELECTRONIC CONTROL P.C BOARD

52C

❈

3

5

33

MV

DISPLAY P.C.BOARD

F11

HIC1

TRANS

IC141

NR11

CN 112

CN 121

CN211

4

C11

2 1

CN 111

RT12

3

BRN YLW GRY

MF

WHT RED BLK

RT11

SYMBOL

C11 F12

F11

MF MV

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

INDOOR FAN CAPACITOR FUSE(93:) FUSE(3.15A) INDOOR FAN MOTOR VANE MOTOR

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

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

MUH-18NV -

NAME

SYMBOL

NR11

RT11 RT12

IC141

52C

E3

MODEL WIRING DIAGRAM

NAME NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR HYBRID IC CONTACTOR

OUTDOOR UNIT

RT61

12VDC

220-240V~

INDOOR UNIT

CONNECTING

TO

GRN/YLW

TB

3

❈

2

WHT

N

❈

BLU

RED

WHT

DSAR

CN730

TAB21

TAB20

WHT

CN661

1

F61

❈

IC881

❈

TRANS

DEICER P.C.BOARD

52C

NO

BLU

COM

X62

C1

21S4

BLK

CN721

NR61

SYMBOL

SR61

WHT

RED

BLK

TB

DSAR

HIC1

52C

VLT

CN720

X62

TERMINAL BLOCK SURGE ABSORBER DC/DC CONVERTER

VLT

RED WHT

BLK

R

1 2 3 4

RED

ORN

WHT BLK

C65

CN711

MC

S

1 2 3 4

C

MF

SYMBOL

C1

C65

DSAR

F61

MC

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

COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR SURGE ABSORBER FUSE(2A) COMPRESSOR<INNER THERMOSTAT>

2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.

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

4. “❈”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.

NAME

SYMBOL

MF NR61 RT61 SR61

TB

NAME NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

SYMBOL

X62

21S4

52C

IC881

REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR DC/DC CONVERTER

1.Slide the sleeve.

2.Pull the wire while pushing the locking lever.

23

6

REFRIGERANT SYSTEM DIAGRAM

MSH-07NV MSH-07NV -

INDOOR UNIT

Unit:mm

E1

E2

Refrigerant pipe [ 9.52 (Option)

(with heat insulator)

Muffler

Reversing valve (4-way valve)

MUH-07NV MUH-07NV -

OUTDOOR UNIT

E1

E2

Indoor heat exchanger

Room temperature thermistor RT11

MSH-09NV MSH-09NV -

INDOOR UNIT

Indoor coil thermistor RT12

E1

E2

Stop valve

Flared connection

Refrigerant pipe [6.35 Stop valve (Option)

(with heat insulator)

Refrigerant pipe [9.52 (Option)

(with heat insulator)

(with service port)

Accumulator

Strainer

Muffler

Defrost thermistor RT61

Check valve

Capillary tube

[1.4x850

Reversing valve (4-way valve)

Strainer

Capillary tube

[1.4x800 (2 pcs)

Capillary tube

[1.6x750

Reversing valve coil (4-way valve coil) heating ON

cooling OFF Refrigerant flow in cooling Refrigerant flow in heating

MUH-09NV MSH-09NV -

OUTDOOR UNIT

Outdoor heat exchanger

Unit:mm

E1

E2

Indoor heat exchanger

Room temperature thermistor RT11

24

Indoor coil thermistor RT12

Flared connection

Refrigerant pipe [6.35 Stop valve (Option)

(with heat insulator)

Stop valve (with service port)

Accumulator

Strainer

Defrost thermistor RT61

Capillary tube

[1.6x1300

Check valve

Strainer

Capillary tube

[1.4x800 (2 pcs)

Capillary tube

[1.6x400

Reversing valve coil

(4-way valve coil)

heating ON

cooling OFF

Refrigerant flow in cooling Refrigerant flow in heating

Outdoor heat exchanger

MSH-12NV MSH-12NV -

INDOOR UNIT

Unit:mm

E1 E2

Refrigerant pipe [12.7 (Optional)

(with heat insulator)

Reversing valve (4-way valve)

Muffler

MUH-12NV MUH-12NV -

OUTDOOR UNIT

E1

E2

Indoor heat exchanger

RT11

Room temperature thermistor RT11

MSH-18NV MSH-18NV MSH-18NV -

INDOOR UNIT

Indoor coil thermistor RT12

E1

E2

E3

Flared connection

Refrigerant pipe (Option) [6.35

(with heat insulator)

Refrigerant pipe [15.88 (Option)

Stop valve (with service port)

Accumulator

Strainer

Stop valve

Reversing valve (4- way valve)

Compressor

Capillary tube

[1.4x500

Check valve

Outdoor

Defrost thermistor

heat exchanger

RT61

Capillary tube

[1.6x400

Reversing valve coil (4-way valve coil) heating ON cooling OFF

Refrigerant flow in cooling Refrigerant flow in heating

MUH-18NV MUH-18NV MUH-18NV -

OUTDOOR UNIT

Unit:mm

E1

E2

E3

Indoor heat exchanger

Indoor coil thermistor RT12

Room temperature thermistor RT11

Distributor

(with heat insulator)

Flared connection

Refrigerant pipe (Option) [6.35

(with heat insulator)

Muffler

Stop valve (with service port)

Accumulator

Strainer

Stop valve

Compressor

Capillary tube

[2.0X800

Check valve

Strainer

Outdoor

Defrost thermistor

heat exchanger

RT61

Capillary tube

[1.6x750

(2 pcs)

Reversing valve coil (4-way valve coil) heating ON cooling OFF

Refrigerant flow in cooling Refrigerant flow in heating

25

Unit:mm

MSH-24NV MSH-24NV -

INDOOR UNIT

Indoor heat exchanger

Room temperature thermistor RT11

E1 E2

Indoor coil thermistor RT12

Distributor

Refrigerant pipe [15.88 (Option) (with heat insulator)

Ball valve

Flared connection

Refrigerant pipe (Option) [9.52

Ball valve with Service port

(with heat insulator)

Muffler

Strainer

Capillary tube [2.0X350

Reversing valve (4- way valve)

Accumulator

Check valve

Strainer

Compressor

Capillary tube

[1.6X350

Capillary tube

[2.4X200

MUH-24NV MUH-24NV -

E1 E2

OUTDOOR UNIT

Outdoor heat exchanger

Defrost thermistor

RT61 Discharge pressure regurator open

23.5 kgf/J

Refrigerant flow in cooling Refrigerant flow in heating

26

MAX. REFRIGERANT PIPING LENGTH

Models

Outdoor unit precharged

(up to 7m)

2400

Refrigerant piping length (one way)

15m

520

7m

0

10m

195

MSH-24NV -

E1

MSH-24NV -

E2

Refrigerant piping

Models

MSH-07NV - E1 MSH-09NV - E1 MSH-07NV - E2 MSH-09NV - E2

Max. length : m

A

10

Piping size O.D : mm Length of connecting pipe : m

Gas

Liquid

Indoor unit

Outdoor unit

9.52

MSH-12NV - E1 MSH-12NV - E2

MSH-18NV - E1 MSH-18NV - E2 MSH-18NV - E3 MSH-24NV - E1

MSH-24NV - E2

15

12.7

15.88

MAX. HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE(R-22 : g)

Models

MSH-07NV - E1 MSH-09NV - E1 MSH-07NV - E2 MSH-09NV - E2 MSH-12NV - MSH-12NV - MSH-18NV - MSH-18NV - MSH-18NV -

E1 E2

E1

E2

E3

Outdoor unit precharged

(up to 7m)

850

1150

1800

6.35

9.52

Refrigerant piping length (one way)

7m

0

10m

150

Calculation : Xg=50g/m ✕ (A-7)m

0.43

0

15m

400

Calculation : Xg=65g/m ✕ (A-7)m

27

EVACUATION PROCEDURES(AIR PURGE)

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

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

When vacuuming

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

Run the vacuum pump for more than 15 minutes and at this

time confirm that the pressure gage indicates – 0.1 Mpa.

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

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

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

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

28

Pipe length :

7m maximum

No gas charge

is needed

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

Retighten the cap.

Leak test

Pipe length

exceeding 7m Charge the prescribed amount of gas

7

Wet-and dry-bulb thermometers

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

PERFORMANCE CURVES

(1) GUARANTEED VOLTAGE

Rated voltage : ±10% (198 ~ 264V

),50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °CWB (2) Indoor outlet air wet-bulb temperature : °CWB (3) Outdoor intake air dry-bulb temperature : °CDB (4) Total input: W (5) Indoor intake air dry-bulb temperature : °CDB (6) Outdoor intake air wet-bulb temperature : °CWB (7) Total input : W

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

How to measure the indoor air wet-bulb/dry-bulb temperature difference

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

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

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL(HEAT) MODE.

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

}

Cooling

Heating

INDOOR UNIT

OUTDOOR UNIT

29

0.7

0.6

0.5

0.4

0.3

7

6

5

4

3

9.1

11.4

7.6

8.5

9.4

10.4

12.0

12.7

8.1

9.2

10.3

11.5

14.0

24

25.5

23.5

21.6

19.6

17.6

15.6

13.7

11.7

28.7

26.5

24.3

22.5

19.9

17.7

15.5

13.2

28.0

25.9

23.7

21.6

19.4

17.2

15.1

12.9

28.0

25.9

23.7

21.6

19.4

17.2

15.1

12.9

19.9

18.4

16.9

15.3

13.8

12.3

10.7

9.2

24

NOTE:The above curves are for the heating operation without any frost.

OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation

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

Dry-bulb temperature

20 25

Relative humidity(%)

50 60

30 70

➁ Air flow should be set at MAX. ③ The unit of pressure has been changed to MPa on the international system of units(SI unit system).

ff

The conversion factor is : 1(MPa • G) =10.2(kgf/

(kgf/F•G)(MPa•G)

MUH-07NV -

• G)

E2E1

MUH-07NV -

220V

Ambient temperature(˚C) Ambient humidity(%)

220/240V

Outdoor unit current (A)

Ambient temperature(˚C) Ambient humidity(%)

30

Outdoor low pressure

E2E1

240V

0.7

0.6

0.5

0.4

0.3

7

6

5

4

3

(kgf/F•G)(MPa•G)

0.7

0.6

0.5

0.4

0.3

0.2

7

6

5

4

3

2

0.7

0.6

0.5

0.4

0.3

0.2

7

6

5

4

3

2

12

13

MUH-09NV -

220/240V

E2E1

MUH-09NV -

E2E1

220V

240V

Outdoor low pressure

Ambient temperature(˚C) Ambient humidity(%)

(kgf/F•G)(MPa•G)

7

6

5

4

Outdoor low pressure

3

MUH-12NV -

0.7

0.6

0.5

0.4

0.3

Ambient temperature(˚C) Ambient humidity(%)

(kgf/F•G)(MPa•G)

MUH-18NV -

220/240V

Outdoor unit current (A)

Ambient temperature(˚C) Ambient humidity(%)

E2E1

MUH-12NV -

E2E1

220V

240V

Outdoor unit current (A)

Ambient temperature(˚C) Ambient humidity(%)

E3E2E1

MUH-18NV -

E3E2E1

220V

240V

Outdoor low pressure

Outdoor unit current (A)

Ambient temperature(˚C) Ambient humidity(%)

(kgf/F•G)(MPa•G)

MUH-24NV -

E2E1

220V

Outdoor low pressure

Ambient temperature(˚C) Ambient humidity(%)

MUH-24NV -

Outdoor unit current (A)

Ambient temperature(˚C) Ambient humidity(%)

E2E1

220V

240V

31

HEAT operation

13

12

11

10

9

Condition indoor:Dry bulb temperature 20.0°C

Wet bulb temperature 14.5°C

Outdoor:Dry bulb temperature 7,15,20°C

Wet bulb temperature 6,12,14.5°C

MUH-07NV -

Outdoor unit current (A)

Ambient temperature(˚C)

MUH-09NV -

220V

240V

E2E1

220V

240V

MUH-12NV -

220V

240V

Outdoor unit current (A)

Ambient temperature(˚C)

E2E1

MUH-18NV -

220V

240V

E2E1

E3E2E1

Outdoor unit current (A)

Ambient temperature(˚C) Ambient temperature(˚C)

Outdoor unit current (A)

MUH-24NV -

220V

Outdoor unit current (A)

Ambient temperature(˚C)

E2E1

240V

32

8

Mode

COOL mode of

"I FEEL CONTROL"

DRY mode of

"I FEEL CONTROL"

HEAT mode of

"I FEEL CONTROL"

Initial room temperature

more than 25:

23: to 25:

less than 23:

MICROPROCESSOR CONTROL

Wireless remote controller

MSH-07NV - MSH-09NV - MSH-12NV MSH-18NV - MSH-24NV -

E1E1

MSH-07NV - MSH-09NV - MSH-12NV MSH-18NV - MSH-24NV - MSH-18NV -

Once the controls are set, the same operation mode can be

repeated by simply turning the OPERATE/STOP button ON. Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to

protect system from overload and compressor will not restart

for 3 minutes.

8-1. “I FEEL CONTROL” ( ) OPERATION

(1) Press OPERATE/STOP button on the remote controller.

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

(2) Press OPERATION SELECTbutton to set “I FEEL CON-

TROL”( ). Then a beep tone is heard.

(3) The operation mode is determined by the initial room

temperature at start-up of the operation.

E1E1E1

E2E2E2

E3E2E2

INDOOR UNIT DISPLAY SECTION

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

● Under the ON-TIMER ( ) operation, mode is deter- mined according to the room temperature as the operation starts.

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

Example

Previous operation

COOL mode of “I FEEL CONTROL” or COOL mode

● 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 initial room temperature at start-up of the operation.

33

Model

COOL mode of

"I FEEL CONTROL"

DRY mode of

"I FEEL CONTROL"

HEAT mode of

"I FEEL CONTROL"

Initial room temperature Initial set temperature

26:

26: or more

26: or less

23: or less

23: or 25:

24:

Initial room temperature minus 2: Initial room temperature minus 2:

❈1

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

❈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.

● Fuzzy control

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

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

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

34

— 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 <MSH-07/09/12> When the indoor coil thermistor RT12 reads 4°C or below for 5 minutes, the coil frost prevention mode

starts.

<MSH-18/24>When the indoor coil thermistor RT12 reads 3°C or below, the coil frost prevention mode starts immediately.

However the coil frost prevention will not work for 5 minutes after 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 4°C (MSH-07/09/12) or below 3°C (MSH-18/24) this mode prolonged until the RT12 reads over 4°C (MSH-07/09/12) or 3°C (MSH-18/24).

② Time control

When the three conditions below have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes. a. Compressor has been continuously operating. b. Indoor fan speed is Lo or Me. c. Room temperature is below 26°C. When compressor 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 26°C.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 FANSPEED CONTROL button. Followings are the fan speed in AUTO.

Initial temperature difference Fan Speed Room temperature minus set temperature : 2 degrees or more ··············································Hi Room temperature minus set temperature : 1 degree or more and less than 2 degrees·······Me Room temperature minus set temperature : less than 1 degree··············································Lo

1 deg.

—DRY mode of “I FEEL CONTROL”—

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

decrease.

The operation of the compressor and indoor fan is as follows.

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

Compressor operates by temperature control and time control.

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

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

2 deg.

1.66 deg.

4 deg.

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

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

35

Operation time chart

Released

Cold Air Prevention

18: 22:

Example

Thermostat

1st ON

ON

OFF

ON

OFF

ON

OFF

1 min.

Indoor fan

Outdoor fan compressor

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 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: 2 degrees or more················································· Hi Set temperature minus room temperature: 1 degree or more and less than 2 degrees··········· Me Set temperature minus room temperature: less than 1 degree················································· Lo

(2) Cold air prevention control

The fan runs at set speed when the indoor coil thermistor RT12 temperature exceeds 22°C. The fan operates at VLo when the temperature is below 18°C. But the fan stops when the indoor fan operates at VLo and the temperature is 15°C or less. NOTE : At initial in hysteresis this control works.

Initial temperature difference Fan speed

1 deg.

2 deg.

1.66 deg.

4 deg.

(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 37°C 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 37°C, 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 22°C or more.

36

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: 52°C (MSH-07/09/12/24), 50°C (MSH-18) Outdoor fan ON : 48°C (MSH-07/09/12/24), 46°C (MSH-18)

High pressure protection time chart Indoor coil thermistor

RT12 temperature

52˚C(MSH-07/09/12/24) 50˚C(MSH-18)

48˚C(MSH-07/09/12/24) 46˚C(MSH-18)

Outdoor fan motor turn OFF

Outdoor fan motor turn ON

Outdoor fan motor

ON

OFF

ON

OFF

NOTE 1 :When the outdoor fan is OFF in heating, defrosting of outdoor heat exchanger is not detected by the defrost thermis-

tor RT61.

NOTE 2 :When connected to MXZ-32NV- outdoor unit,the MSH-07/09/12NV-

MSH-18NV- indoor unit sends the data for the temperature to the outdoor unit according to the indoor coil temper-

E3

, MSH-07/09/12/18NV- and

E2E1E1

ature.For the further information,refer to the service manual No.OB185.

3. Defrostings

Defrostings 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 40 minutes without the defrosting opera-

tion working. b) The defrost thermistor RT61 reads - 3°C or less. 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 3.1°C or more. e) The defrosting time exceeds 10 minutes.

37

(3) Defrosting time chart

Defrost thermistor RT61

3.1: or more

-3: or less

Outdoor 52C relay(Compressor)

ON OFF

X62 (Reversing valve coil)

ON OFF

30 sec.

15 sec.

30 sec.

5~15 sec.

SR61 Outdoor fan

Defrost counter

Indoor fan

ON OFF

ON

Max 10 min.

❈

VLo

OFF

Indoor vane

Horizontal Set position

NOTE1 ● When the indoor coil thermistor reads above 18°C, indoor fan operates at VLo for 30 seconds.

● When the indoor coil thermistor reads 18°C or less, the indoor fan stops.

NOTE2: Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- , and MSH-18NV-

are connected with MXZ-32NV- as multi system units.

E1

E3E2E1

38

4. Reversing valve control

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

NOTE1: The Reversing valve reverses for 5 seconds right before start-up of the compressor. NOTE2: Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- , and MSH-18NV-

are connected with MXZ-32NV- as multi system units.

E1

(COOL / DRY)

5 sec.

(HEAT)

5 sec.

E3E2E1

Compressor

ON OFF

ON

Reversing valve

OFF

ON

Outdoor fan

OFF

8-2. 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 TEMPERATURES button.

(TOO WARM or TOO COOL button)

The setting range is 16 ~ 31°C

✻ Indoor fan continues to operate regardless of

thermostat’s OFF-ON

✻ Coil frost prevention is as same as COOL

mode of “I FEEL CONTROL”

8-3. 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 on the right chart.

Thermostat (SET TEMP.)does not work.

The other operations are same as DRY mode of

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

temperature is 13°C or below. (5) When DRY operation functions, the fan speed

is lower than cool operation.

ON OFF

8-4. HEAT ( ) OPERATION

(1) Press OPERATE/STOP button.

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

The setting range is 16 ~ 31°C. (4) Indoor fan speed control, high pressure protection, defrosting, heater control are the same as HEAT mode of “I FEEL

CONTROL”.

39

SLEEP

8-5. FAN MOTOR CONTROL

(1) Rotational frequency feedback control

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

the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (Hi,Me,Lo,SLEEP), the microprocessor controls SR11 (MSH-07/09/12), IC141 (MSH-18/24) 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 lamp flashes on and off to show the fan motor abnormality. (See page 49.)

8-6. 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 pulse signals (approx. 12V) transmitted from indoor microprocessor.

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

40

(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 is changed from 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 or VANE CONTROLbutton ( ) is pressed or the operation stops or changes to other mode.

(7) Cold air prevention in HEAT operation

When either of the following conditions occurs in HEAT operation, 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 24: or below. ➃ Indoor coil thermistor RT12 temperature is raising from 24°C or below, but it does not exceed 28:.

Indoor coil thermistor RT12 temperature

NOTE:At initial in hysteresis this control works.

8-7. SLEEP MODE ( )

• When the SLEEP button ( ) is pressed, the indoor fan speed drops and the air flow sound from the indoor unit is decreased.

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

• When the FAN SPEED CONTROL button ( ) is pressed during the SLEEP mode, the SLEEP mode is released.

Angle 1

24:

Set position

28:

41

8-8. TIMER OPERATION

1. How to set the timer

(1) Press OPERATE/STOP button to start the air conditioner.

(2) Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display

of TIME MONITOR so set the current time, correctly with CLOCK SET button.

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

“ ” button... AUTO START operation (ON timer) “ ” 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 “ ” or “ ” mark is flashing. These marks disappear in 1 minute. When setting the ON timer, check that OPERATION INDICATOR lamp 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

TIME setting can be cancelled with the TIMER CONTROL buttons. (“ ” or “ ”) To cancel the ON timer, press the “ ” button.

To cancel the OFF timer, press the “ ” button. TIME is cancelled and the display of set time disappears.

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.

42

8-9. EMERGENCY-TEST OPERATION

Emergency operation switch

When the remote controller is missing, has failed or the batteries run down, press the EMERGENCY OPERATION switch on the front of the indoor unit. The unit will start and the OPERATION INDICATOR lamp will light. The first 30 minutes of operation will be the test run operation. This operation is for servicing. The indoor fan runs at high speed and the system is in continuous operation. The thermostat is ON and the timer is reset to normal. After 30 minutes of test run operation the system shifts to 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 with a set temperature of 24°C. Defrosting of outdoor heat exchanger works in EMERGENCY HEAT MODE. NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.

EMERGENCY COOL/HEAT MODE

Press once

<Cool>

Press again

<Heat>

Press once again

<Stop>

with a set temperature of 24°C.

43

9

MSH-07/09/12NVMSH-18NVMSH-24NV-

Junper wire

JPC

JPE

MODEL Change point

Defrost interval time changes from 40 minutes to 15 minutes

Deforst start temperature changes from -3: to 0: Deforst finish temperature changes from 3.1: to 10.1:.

E1 E2

E1 E2 E3

E1 E2

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

No. 4 unit

1 unit operation No modification

– –

–

2 units operation

Same as at left

Replace J10 with J 11

–

3 units operation

Same as at left Same as at left

Replace J20 with J 21

–

4 units operation

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

Replace J10 with J11

Replace J20 with J21

SERVICE FUNCTIONS

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 56 and 59. Defrost thermistor RT61 must read below -3°C

2. DEFROST TERMINATION CHANGE

<JPC> when the JPC wire of the deicer P.C. board is cut, the defrost interval time will be changed. (See page 56 and 59.) <JPE> when the JPE wire of the deicer P.C. board is cut, the defrost temperature will be changed. (See page 56 and 59.)

3. TIMER SHORT MODE

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

Short the connector during the timer mode.

}

4. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit.

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

MSH-07NV - MSH-09NV - MSH-12NV - MSH-18NV MSH-18NV -

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.

Originally, chip parts are fitted on J10/J20 side and there is no chip parts on the other side. Remove the chip parts of J10/J20 side and connect Jumper wire to J11/J21 side as shown in Table 1. Either J1O or J11 /J20 or J21 should be attached for normal operation.

E2

E1E1E1E1

Table.1

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

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

44

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.

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

No. 4 unit

1 unit operation No modification

– –

–

2 units operation

Same as at left

Cut J1

–

3 units operation

Same as at left Same as at left

Cut J2

–

4 units operation

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

Cut both J1 and J2

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

MSH-07NV - (Serial number 7000201T~) MSH-09NV - (Serial number 7000201T~) MSH-12NV - (Serial number 7000001T~) MSH-24NV MSH-07NV - MSH-09NV MSH-12NV - MSH-18NV - (Serial number 7000001T~) MSH-24NV - MSH-18NV -

How to modify the remote controller P.C. board

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

E1E1

E2E2

E3E2

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.

Table.1

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

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

45

C11

52C

CN201

CN112

CN121SW

CN111

IC101

CN211

CN151

JR07

JR06

CN102

CN151

CN112 CN111CN121

CN101

BZ

SW

52C

IC101 RA102

IC141

CN211

C11CN201

5. AUTO RESTART FUNCTION

MSH-07NV - MSH-09NV MSH-12NV - MSH-24NV MSH-18NV -

When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P.C.board. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure.Then, the unit will restart automatically. However if the unit is operated in “I FEEL CONTROL.” mode before power failure, the operation is not memorized. In “I FEEL CONTROL.” mode, the operation is decided by the initial room temperature.

E3

E2E2

How to set “AUTO RESTART FUNCTION”

1Turn off the main power for the unit. 2Removed the electronic control P.C. board and the display P.C.board. (See page 60 and 62.) 3Cut the RESISTOR JR07 (MSH-07/09/12) or JR06(MSH-18/24) on the indoor electronic control P.C.board.

MSH-07/09/12

MSH-18/24

Operation

1If the main power (220/240V AC) has been cut, the operation settings remain. 2After the power is restored, the unit restarts automatically according to the memory.(However, it takes at least 3 minutes

for the compressor to start running.)

Note:

•The operation settings are memorized when 10 seconds have passed after the remote controller was operated.

•If main power is cut while AUTO START/STOP timer is active ,the timer setting is cancelled when auto restart function

works.

•If the unit has been off with the remote controller before power failure, the auto restart function does not works as the

power button of the remote controller is off.

•To prevent breaker off due to the rush of startting current, systematize other home appliance not to turn on at the same

time.

•When more than one air conditioners are connected under the same power system,compressor starting current as large

as that for all the compressors used flows at a time as soon as the units restart automatically.

Therefore, the specific counter-measures are required to prevent main voltage drop or the rush of starting current after

power failure by providing the system to allow the units to start in regular succession.

46

10 TROUBLESHOOTING

Lead wiring

Housing point

MSH-07NV - MSH-09NV - MSH-12NV MSH-18NV - MSH-24NV - MSH-07NV MSH-09NV - MSH-12NV - MSH-18NV MSH-24NV - MSH-18NV -

E3E2

E1E1E1

E2E1E1

E2E2E2

10-1 Cautions on troubleshooting

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

1) Check the power supply voltage.

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

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

1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then after confirming the horizontal vane is closed, turn off the breaker.

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

components.

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

10-1-3 Troubleshooting procedure

1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2) If the electronic control 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 48 and the check table on page 49.

10-1-4 How to replace batteries

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

AA

RESET button

There are two kind of remote controllers. AAtype has the RESET button at the back, and BBtype does it on the front. How to use the two buttons are given in the Instruction Manual.

BB

RESET button

47

10-2 Instruction of troubleshooting

Start

Indoor unit operates. Outdoor unit doesn’t operate.

Outdoor unit operates in only Test Run operation.

Check room temperature thermistor.

Refer to “How to check mis-wiring and signal error (when outdoor unit doesn’t work)” on page 53 and

54.❈1

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

Refer to “Check of outdoor unit” on page 52.

D

E

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

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

51.

1-time flash

Cause:indoor/outdoor unit connecting

Trouble of mis-wiring

(

Trouble of the serial signal

B

Check indoor coil thermistor. Refer to“Test point diagram and voltage” on page 55,57 and

58.

OPERATION INDICATOR lamp on the indoor unit is flashing on and off.

2-time flash

2.5-second OFF

3-time flash

2.5-second OFF

Cause:Indoor unit

2-time-Room tempera-

ture/Indoor coil thermistor trouble

3-time-Indoor fan motor

trouble

Refer to “Check of indoor fan motor” on page 51.

Indoor unit doesn’t receive the signal from remote controller. Also, OPERATION INDICATOR lamp doesn’t flash, when the EMERGENCY OPERATION switch is pressed.

Refer to “Check of indoor electronic control P.C. board” on page 52.

6-time flash

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

A

Check room temperature thermistor. Refer to“Test point diagram and voltage” on page 55,57 and

58.

C

2.5-second OFF

door thermistor

48

❈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.”

10-2-1 troubleshooting check table

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

NO.

1

Abnormal

point

Mis-wiring

Serial signal

0.5-second ON

0.5-second OFF

1-time flash

2.5-second OFF

Indication

Symptom

Outdoor unit

does not run.

Detect method

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.

● Check wiring (visual check and conductivity check).

● Check indoor electronic control P.C.board.

● Check outdoor DEICER P.C. board.

● Check electrical parts.

Check point

Indoor coil thermistor

2

Room temperature thermistor

Indoor fan

3

motor

Outdoor

4

thermistor

❈

Outdoor

power

5

system

❈

Outdoor

control

6

P.C. board

❈

Outdoor control

7

P.C. board

❈

Outdoor

control

8

P.C. board

❈

The indication is shown only when the indoor unit connects with the outdoor unit MXZ-32NV- .

2-time flash

2.5-second OFF

3-time flash

2.5-second OFF

6-time flash

2.5-second OFF

5-time flash

2.5-second OFF

7-time flash

10-time flash

light 2.5-second OFF flash

2.5-second OFF

Outdoor unit does not run.

Indoor fan

repeats 12 seconds ON and 3 minutes OFF.

When the indoor

fan breaks, the fan keeps stopping.

Outdoor unit

does not run

Outdoor unit does not run

Outdoor unit runs but the indoor unit does not run.

Detect 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.

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

When the compressor operation is continuosly three times interruped by overcurrent protection within 1 minute after start-up , it stops operation.

The outdoor unit stops operation when it cannot properly read data in the nonvolatile memory of the outdoor control P.C.board.

When the indoor unit detects drain abnormality and the indoor coil temperature is too low.

When the operation mode of each rooms is setted COOL(includes DRY) and HEAT at same time, it take precedence the operation mode runs first.

● Check thermistor calibration.

● Reconnect connector.

● Check indoor electronic control P.C.board.

● 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.

● Shortage of refrigerent.

● Check outdoor DEICER P.C. board.

● Check the inverter output.

● Check the compressor.

● Check the outdoor control P.C.board.

● Check the drain punp.

● Check the drain sensor.

● Check LEV.

●Adjust the operation mode.

E1

2

3

49

10-2-2 Trouble criterion of main parts

P

R

C

S

RED

BLK

WHT

MAINAUX.

ORNWHT

RED

BLK

MAIN

AUX.

P

WHTREDBLK

MAIN

AUX.

P

C

REDORN WHT

YLW

BLK

MAIN

AUX.1AUX.2

ORN

BLUYLW

INNER PROTECTOR

RED

PNK

ROTOR

P

FUSE

WHTREDBLK

MAIN

AUX.

MSH-07NV- MSH-09NV- MSH-12NVMSH-18NV- MSH-24NV-

E1E1

MSH-07NV- MSH-09NV- MSH-12NVMSH-18NV- MSH-24NV- MSH-18NV-

Part name

Room temperature thermistor

Indoor coil thermistor

Defrost thermistor

Compressor

Indoor fan motor

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

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

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

07NV

3.67~4.50Ω

C-R

5.07~6.20Ω

C-S

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

Motor partSensor part

WHT-BLK

BLK-RED

Measure the voltage Power ON.

BRN-YLW YLW-GRY

Check method and criterion

Normal

8kΩ ~ 20kΩ

Normal

5kΩ ~ 60kΩ

Normal

09NV

2.88~3.52Ω

5.13~6.28Ω

12NV 18NV

1.85~2.28Ω

3.44~4.21Ω

07/09/12NV 280 ~ 303Ω 313 ~ 336Ω

Normal

4.5 ~ 5.5V

(When fan revolved one time)

0V➔5V➔0V

(Approx.)

E1E1E1

E2E2E2

E3E2E2

Abnormal

Opened or short-circuited

Abnormal

Opened or short-circuited

24NV

1.05~1.30Ω

2.38~2.91Ω

0.85~1.04Ω

1.83~2.23Ω

Normal

18/24NV 176 ~ 192Ω 240 ~ 261Ω

Figure

Abnormal

Opened or

short-circuited

Abnormal

Opened or

short-circuited

Abnormal

Remain 0V or 5V

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

Outdoor fan motor

07/09NV WHT-BLK BLK-RED

192~236Ω 373~458Ω

BLK-YLW

YLW-RED

Measure the resistance between the terminals with a tester.

Vane motor

50

(Part temperature10°C ~ 30°C)

07/09/12NV 282 ~ 305Ω

18/24NV 358 ~ 388Ω

– –

Normal

12NV 114 ~ 141Ω 118 ~ 146Ω

– –

18NV

102 ~ 126Ω

97.9 ~ 120Ω – –

24NV

55.3 ~ 67.6Ω –

26.6 ~ 32.6Ω

55.5 ~ 67.8Ω

Abnormal

Opened or short-circuited

Abnormal

Opened or

short-circuited

07NV 09NV

12NV 18NV

24NV

Vane motor

A

Check of indoor fan motor

Inodoor fan does not operate.

No

Reconnect the lead wires.

Check of receiver P.C. board

B

Are lead wires connected?

Disconnect lead wires from connector CN211 on indoor electronic control P.C. board. Measure resistance between lead wires No.1 and No.4 and then No.1 and No.2(MSH-18/24)

Turn OFF power supply. Check connector CN211 visually.

Yes

{

No.1 and No.3 and then No.2 and No.3(MSH-07/09/12)

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

Yes ( 0 or ∞ )

Repair the indoor fan motor.

Is soldered point nomal?

Yes

Replace the indoor electronic control P.C. board.

No

(others)

No

Resolder it.

}

Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller.

Check the model name of remote controller.

Is LCD display on remote controller visible?

Yes

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

Does the unit operate with remote controller?

Yes

OK

No (not clear)

No

Measure the voltage between receiver P.C. board connector No.2 when remote controller button is pressed.

Replace the batteries.(see page 47.)

Turn on a radio to AM and press switch on

remote controller.

Is noise heard from radio?

Yes

Are there any fluorescent lights of inverter or rapid-start type within the range of 1m?

No

{

indoor electronic control P.C. board connector LD101 No.2 and JPG(MSH-07/09/12)

No

Yes

Replace the remote controller.

● Re-install the unit away from lights.

● Attach a filter on receiving part.

(+)

and No.1(MSH-18/24)

}

Is the voltage approx. 4V DC?

No(5V or 0V DC)

Replace the receiver.

Yes

Replace the indoor electronic control P.C. board.

51

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

Trouble of indoor electronic control P.C. board.

Yes

Is there resistance ? (Approx.0Ω)

N

Trouble of fuse(F12)

No

Is varistor(NR11)burnt?

Yes

Replace the varistor.

No

07/09NV

12/18NV

24NV

D

Check of outdoor unit

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

Start

Press EMERGENCY OPERATION switch. 3-minute time delay works. Test run operation operates for 30 minutes.

24NV

Is voltage applied to fan motor and compressor relay normal when you look at checkpoints about outdoor DEICER P.C.borad?

CN201

1133

F12

L

Terminal

N

L N

block

Terminal block

No

Replace DEICER P.C.board

11

22

F12

33

11

NF

23

F12

Check voltage to terminal block of outdoor unit. Is there AC220-240V to terminal block between - ?

No

Check voltage to terminal block of indoor unit. Is there AC220-240V to terminal block between - ?

07/09/12/18NV

Replace the indoor elec-

tronic control P.C. board.

No

Confirm wiring connection

at indoor terminal block.

2

24NV

52

Yes

N

Yes

N

07/09/12/18NV

Check the outdoor DEICER P.C.board at first, then check the outdoor fan motor and the compressor.

Check the continuity of indoor and outdoor unit connection.

Yes

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

E

MSH-07NV MSH-09NV MSH-12NV MSH-18NV

Yes

1. Turn OFF power supply and disconnect in-out connecting wire on indoor side.

2. Short-circuit between indoor terminal block and

3. Turn ON power supply and press EMERGENCY OPERATION switch.

Repair wiring.

Is there 20V DC between both ends of R132 when relay (52C) turns ON? ( By tester, the stylus is between 0 ~ 20V. )

•Turn OFF power supply.

•Connect ON in-out connecting wire.

•Turn ON power supply.

Start

1. Turn OFF power supply.

2. Turn ON power supply.

3. Press

EMERGENCY OPERATION

3 min. later, when relay 52C turns ON, what self-check result is displayed on OPERATIONINDICATOR lamp on indoor unit? ❈ 1

Mis-wiring is indicated.(0.5-sec.ON, 0.5-sec.OFF)

Is there mis-wiring, poor contact, or wire disconnection?

No

N

No

switch.

3

❈ 1 Short circuit of JPG and JPS on the

indoor electronic control P.C. board enables self-check to be displayed in 3 seconds.

Serial signal error is indicated. (0.5-sec.ON, 2.5-sec.OFF)

Replace the indoor electronic control P.C. board.

3 minutes later, when EMERGENCY OPERATION switch is pressed and 52C relay turns ON, is there AC 220-240V between outdoor

terminal block - ?

Under the same condition as 3 minutes later, when EMERGENCY OPERATION switch is pressed and 52C relay turns on, is there DC 5V between

+

J8 -J7 ?

Under the same condition as 3 minutes later, when EMERGENCY OPERATION switch is pressed and 52C relay turns on, is there DC 10V between both ends of R601? (By tester, the stylus is between 5 ~10V)

Replace the outdoor DEICER P.C. board.

N

2

Yes

No

–

Yes

No

Yes

No

Rectify in-out connecting wire.

Check and rectify fuse and varistor on outdoor DEICER P.C. board.

Rectify in-out connecting wire.

53

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

E

MSH-24NV

Yes

1. Turn OFF power supply and disconnect in-out connecting wire on indoor side.

2. Short-circuit between indoor terminal block and

3. Turn ON power supply and press EMERGENCY OPERATION switch.

Repair wiring.

3 minutes later,is there DC 20V between both ends of R132? ( By tester, the stylus is between 0 ~ 20V. )

•Turn OFF power supply.

•Connect ON in-out connecting wire.

•Turn ON power supply.

Start

1. Turn OFF power supply.

2. Turn ON power supply.

3. Press

EMERGENCY OPERATION

3 min. later, what self-check result is displayed on OPERATION INDICATOR lamp on indoor unit? ❈ 1

switch.

Mis-wiring is indicated.(0.5-sec.ON, 0.5-sec.OFF)

Is there in-out mis-wiring, poor contact, or wire disconnection?

No

3

N

No

❈ 1 Short circuit of JPG and JPS on the

indoor electronic control P.C. board enables self-check to be displayed in 3 seconds.

Serial signal error is indicated. (0.5-sec.ON, 2.5-sec.OFF)

Replace the indoor electronic control P.C. board.

N

Is there AC220~240V between outdoor terminal blocks - ?

2

Yes

3 minutes later, when EMERGENCY OPERATION switch is pressed is there DC 5V between J8 -J7 on outdoor DEICER P.C. board?

+

No

–

Yes

3 minutes later, when EMERGENCY OPERATION switch is pressed and 52C relay turns on, is there DC 10V between both ends of R601? (By tester, the stylus is between 5 ~10V)

No

Yes

Replace the outdoor DEICER P.C. board.

No

Replace in-out connecting wire of

N

2

and .

Check and rectify fuse and varistor on outdoor DEICER P.C. board.

3

Replace

in-out connecting wire.

54

TEST POINT DIAGRAM AND VOLTAGE MSH-18NV Indoor electric control P.C.board

E1

Fan motor power supply

}

Fuse AC250V 3.15A

Power supply input AC 220-240V

}

+

R132

}

DC 0 ~20V

--

C144

+

--

C144

Room temperature thermistor(RT11)

Indoor coil thermistor(RT12)

Timer short mode point

DC5V

}

Emergency operation

switch

JPG

--

JP43

+

DC12V

}

55

MUH-18NV Outdoor deicer P.C. board

Outdoor fan motor AC 220-240V

E1

Reversing valve coil AC 220-240V

}

R601 DC5~10V

}

+

--

}

DEICER P.C. BOARD

INPUT AC 220-240V

}

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

56

TEST POINT DIAGRAM AND VOLTAGE MSH-07NV - MSH-09NV - MSH-12NV MSH-07NV - MSH-09NV - MSH-12NV Indoor electronic control P.C. board

E1E1E1

E2E2E2

Power supply input AC 220-240V

}

CN201 No1

Varistor(NR11)

Fuse AC250V 3.15A

Room temperature thermistor(RT11)

Indoor coil thermistor(RT12)

R132

P.C.board

Time short mode point

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

DC0~20V

57

TEST POINT DIAGRAM AND VOLTAGE MSH-24NV - MSH-18NV MSH-24NV - MSH-18NV -

E2E1 E3E2

Fan motor power supply

Fuse AC 250V 3.15A

Power supply input

AC 220-240V

}

R132

DC0~20V

C144

+

DC5V

}

C144

Room temperature thermistor(RT11)

Indoor coil thermistor(RT12) JPS

Time short mode point JPS

Emergency operation switch

JPG

DC12V

}

+

JP41

P.C.board

58

MUH-07NV - MUH-09NV - MUH-12NV MUH-24NV - MUH-07NV - MUH-09NV MUH-12NV - MUH-18NV - MUH-24NV MUH-18NV -

E3

Outdoor deicer P.C. board

E1E1E1

E2E2E1

E2E2E2

Outdoor fan motor

AC 220-240V

}

Reversing valve

coil

AC 220-240V

}

R601 DC5~10V

}

+

DEICER P.C. BOARD

INPUT

AC 220-240V

}

Defrost thermistor(RT61)

}

Fuse 2A/250V

Defrost interval time short pin

+

J9

}

J8

DC5V

}

DC12V

+

}

52C

DC12V

Defrost termination temperature change. Jumper wire JPC and JPE

59

11

DISASSEMBLY INSTRUCTIONS

NOTE:

❈ On the wiring diagram shows the terminals with a lock mechanism, so it cannot be removed when you pull the lead wire Be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger.

① Slide the sleeve. ➁ Pull the wire while pushing

the locking lever.

11-1 MSH-07NV - MSH-09NV - MSH-12NV -

MSH-07NV - MSH-09NV - MSH-12NV INDOOR UNIT

OPERATING PROCEDURE

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 and the display P.C. board.

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

Remove the electrical cover.

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

nector from the indoor coil thermistor.

(4) Remove the terminal cover.

Remove the screw of the terminal block. (5) Remove the cord clamp. (6) Disconnect all the connectors on the electronic control P.C.

board. (7) Remove the screw of the ground wire. (8) Disconnect the white lead wire and the brown lead wire

from 52C relay. (9) Remove the electronic control P.C. board and the display

P.C. board.

E1E1E1

E2E2E2

Photo 1

Photo 2

PHOTOS

Front panel

Screw

Room temperature thermistor connector

Ground wire screw

Cord clamp

Terminal block cover

Indoor electronic control P.C.board

Terminal block cover screw

60

OPERATING PROCEDURE PHOTOS

3. Removing the electrical box

(1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211 and CN121) and

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

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

electrical box.

4. Removing the vane motor

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

nector.

(3) Remove the vane motor.

Photo 3

Photo 4

Catch

Vane motor screw

Drain hose

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 5

Fan motor catches

Vane motor

Fan motor fixture

Indoor coil termistor

61

11-2 MSH-18NV - MSH-24NV - MSH-18NV - MSH-24NV -

MSH-18NV -

E3

INDOOR UNIT

OPERATING PROCEDURE PHOTOS

E2E2E1E1

1. Removing the front panel

(1) Remove the screw caps at the down 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 electrical cover. (3) Remove the screw, remove the terminal cover. (4) Remove the screw of terminal block. (5) Unhook the catch of the lamp holder. (6) Remove the receiver holder. (7) Disconnect the connectors and the lead wire from 52C

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

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

Photo 1

Photo 2

Ground

Front panel

Screws

Indoor coil thermistor

Screw

62

Terminal block screw

Indoor electronic control P.C. board

OPERATING PROCEDURE

PHOTOS

3. Removing the electrical box

(1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211 and CN121) and

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

(5) Remove the screw of the electrical box, remove the electri-

cal box.

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

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

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

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

flow fan.

)

(

Remove the screws of the motor band, remove the fan

10

motor.

Photo 3

Photo 4

Catch

Heat exchanger

screw

Bearing support screws

screw

Heat exchanger

Photo 5

Indoor fan motor

Fan motor screws

Line flow fan Motor band

63

11-3 MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV -

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

E2E2E1E1

1. Removing the cabinet

(1) Remove the top panel. (2) Remove the cabinet

Photo 2

Screw for top panel

Screws for cabinet

2. Remove the deicer P.C. board

(1) Remove the top panel, the service panel and the cabinet. (2) Disconnect all the connectors and the terminals on the

deicer P.C. board.

(3) Remove the deicer P.C. board.

Photo 1

Screw for service panel

Photo 3

Service panel

Deicer P.C board

Screw for top panel

Screws for cabinet

3. Removing the propeller fan

(1) Turn the propeller nut clockwise to remove. (2) Pull the propeller fan toward you to remove.

64

Photo 4

Propeller nut

Propeller fan

OPERATING PROCEDURE PHOTOS

4. Removing the outdoor fan motor

(1) Remove the screws securing the outdoor fan motor. (2) Remove the lead clamps. (3) Disconnect the capacitor terminal and wire of the terminal. (4) Pull out the outdoor fan motor.

5. 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. (See Photo 7.) (5) Pull out the lead from the compressor terminal. (6) Remove the overcurrect 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 burner, purge gas from the pipes until the pressure gauge shows 0 kg/cm

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

2

.

Photo 5

Photo 6

Relay panel

Photo 7

Outdoor fan motor set screws

Lead fxture

Outdoor fan motor

Photo 9

Discharge pipe

Suction pipe

Terminal cover

Compressor

Photo 8

Sound proof felt

Compressor nuts

65

11-4 MUH-12NV - MUH-18NV - MUH-12NV - MUH-18NV -

MUH-18NV -

E3

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

1. Removing the cabinet

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

the cabinet.

Photo 1

E2E2E1E1

Photo 2

Screws

2. Removing the deicer P.C. board

(1) Remove the service panel and the cabinet. (2) Disconnect all the connectors and the terminals on the

deicer P.C. board.

(3) Remove the deicer P.C. board.

Service panel

Photo 3

Screws

Deicer

P.C. board

66

Compressor

Red lead wire

White lead wire

Black lead wire

Terminal block

OPERATING PROCEDURE PHOTOS

3. Removing the outdoor fan motor

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

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

4. Removing the compressor

(1) Remove the cabinet. (Refer to 1) (2) Remove the soundproof felt. (3) Remove the terminal cover on the compressor (4) Remove the electrical assembly.

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

Photo 4

propeller fan

Outdoor fan motor

Propeller fan nut

Photo 5

Set screws for outdoor fan motor

Discharge pipe

Lead clamps

Set screws for outdoor fan motor

Terminal cover

Suction pipe

Compressor

Compressor nuts

67

11-5 MUH-24NV- MUH-24NV-

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

E2E1

1. Removing the electrical parts

(1)

Remove the screws and the top panel.

(2)

Remove the screw of the cover panel. To remove the cover panel, pull it toward you and unhook the catches from the side panel.

(3)

Remove the screw of the service panel. To remove the service panel, pull it down toward you and unhook the catches on the both sides.

Photo 1

Screws

Front panel

Photo 2

Outdoor controller board

Top panel

Service panel

Panel cover

Transformer Capacitor

Contactor Overcurrent

relay

2. Removing the fan motor

(1)

Remove the screws of the front panel. Open the front panel to a 45-degree angle. Then lift it and unhook the catches to remove.

(2)

Remove the propeller nut and the propeller fan.

(3)

Remove the screws and the fan motor. Disconnect the lead connectors.

68

Photo 3

Propeller fan

Motor support

Propeller nut

Terminal blockScrews

Separator support

Lead connectors

Valve bed

OPERATING PROCEDURE PHOTOS

3. Removing the heat exchanger and the compressor

(1)

Remove the rear panel.Remove the valve bed, and

open the rear panel to the rear to remove.

NOTE :

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

(2)

Remove the screws of the right side panel and remove it.

(3)

Remove the screws of the rear guard and remove it.

(4)

Remove the screws of the separator support plate and remove it.

(5)

Remove the screws of the motor support and remove it.

(6)

Remove the screws of the valve bed. The valve bed is fixed by the catches on the right and left sides. Lift it to remove.

(7)

Remove the electrical parts box. Disconnect the connectors from the high pressure switch, crank case heater, shell thermo, and fan motor lead.

(8)

Remove the screws of the separator and remove it.

(9)

Remove the screws of the heat exchanger and remove it. Detach the welded point of pipe.

)

(

Remove the nuts of the compressor and remove it.

10

Detach the welded points of the compressor suction pipe and discharge pipe.

Photo 4

Screws

Photo 5

Heat exchanger

Accumulator

Photo 6

Charge plug

Ball valve

Compressor

69

12 PARTS LIST

1

2 3

4

5 6

E02 154 000 E02 157 000 E02 199 000 E02 151 010 E02 164 100 E02 151 234 E02 166 234 E02 151 970 E02 166 067

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

Symbol

in Wiring

Diagram

Q'ty/unit

1 1 2 1

1 2

1

1 2 1

1 2

1

1 2

1 1 2

1

1 2

1 1 2

1

1 2 1

1 2

1PC/SET

2PCS/SET

RemarksPart No.

NO.

Part Name

MSH-07NV- E1

(WH)

1 1 2

MSH-07NV- E2

(WH)

MSH-09NV- E1

(WH)

MSH-09NV- E2

(WH)

MSH-12NV- E1

(WH)

MSH-12NV- E2

(WH)

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

1

2

3

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

Symbol

in Wiring

Diagram

Q'ty/unit

1

1 1

{9.52 {12.7 {6.35

RemarksPart No.

NO.

Part Name

MSH-07/09NV (WH)

E1 E2

MSH-12NV (WH)

E1 E2

INDOOR UNIT STRUCTURAL PARTS MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH) MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH)

E1

E2

1

5

6

4

2

Optional parts

3

INDOOR UNIT HEAT EXCHANGER MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH) MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH)

70

E1

E2

3

2

1

INDOOR UNIT ELECTRICAL PARTS MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH) MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH)

E1

E2

8

16

10

9

7

6

3

5

1

2

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

Symbol

in Wiring

Diagram

E02 166 235

1

E02 166 040

2

E02 141 702

3

E02 151 303

4

E02 151 300

5

E02 151 505

6

E02 151 302

7

E02 151 509

8

E02 151 308

9

E02 151 307

10

E02 198 375

11

E02 199 450 E02 200 450

12

E02 201 450 E02 152 395

13

E02 127 382

14

E02 085 385

15

E02 001 504

16

E02 151 468

17

E02 199 520

18

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

4

MV MF

RT11 RT12

TB

F11

NR11

MSH-07NV-

(WH)

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

1 1 1 1 1 1

E1 E2

13

Q'ty/unit

MSH-09NV-

(WH)

1 1 1 1 1 2 1 1 1 1 1

1

1 1 1 1 1 1

E1 E2

12

MSH-12NV-

(WH)

1 1 1 1 1 2 1 1 1 1 1

1 1 1 1 1 1 1

E1 E2

RemarksPart No.NO. Part Name

RC4V19 2PCS/SET

3.15A

71

E02 096 232 E02 085 297 E02 199 521 E02 085 245 E02 096 630 E02 128 900 E02 164 900 E02 047 506 E02 096 290 E02 096 662 E02 096 661 E02 085 515 E02 154 642 E02 077 961 E02 154 936 E02 159 936 E02 134 937 E02 199 936 E02 139 936

CABINET

TOP PANEL

FAN GUARD

SERVICE PANEL

OUTDOOR HEAT EXCHANGER

COMPRESSOR

COMPRESSOR RUBBER SET

BASE

STOP VALVE(LIQUID)

STOP VALVE(GAS)

MOTOR SUPPORT

CHECK VALVE

REVERSING VALVE

CAPILLARY TUBE

1 2 3 4 5

6

7 8

9 10 11 12 13

14

1 1 1 1 1

1 1 1 1 1 1 1 1

2

1 1

1 1 1 1 1 1

1 1 1 1 1 1 1 1

2 1

MC MC

Symbol

in Wiring

Diagram

Q'ty/unit

RH-174VGHT RH-135VGHT

 { 6.35 { 9.52

  {3.0 ✕{1.6 ✕ 1300 {3.0 ✕{1.4 ✕ 800 {3.0 ✕{1.6 ✕ 400 {3.0 ✕{1.4 ✕ 850 {3.0 ✕{1.6 ✕ 750

RemarksPart No.

NO.

Part Name

MUH-07NV

E1 E2

MUH-09NV

E1 E2

-

OUTDOOR UNIT STRUCTURAL PARTS MUH-07NV MUH-09NV MUH-07NV MUH-09NV -

E1

E2

2

1

5 11

7

13

9

10

8

3

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

72

4

6

OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS MUH-07NV MUH-09NV MUH-07NV MUH-09NV -

E1

E2

1

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

NO.

E02 085 501

1

E02 096 301

2

E02 085 353

3

E02 199 374

4

E02 096 310

5

E02 199 451

6

E02 154 490

7

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

Part Name

2

Symbol

in Wiring

Diagram

MF

C1 TB

RT61

21S4

3

MUH-07/09NV

5

Q'ty/unit

6

4

E1 E2

-

1 1 1 1 1 1 1

RemarksPart No.

RA6V2925+/440VAC

73

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19

20

21

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

Symbol

in Wiring

Diagram

Q'ty/unit

3 RUBBER

RH-231VHAT

{ 6.35 { 12.7

RA6V40 30+/440VAC

  {3.0✕{1.4✕ 500 {3.0✕{1.6✕ 400

RemarksPart No.

NO.

Part Name

MC

MF

CI

TB

RT61

21S4

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

MUH-12NV

E1 E2

E02 141 521 E02 141 232 E02 140 233 E02 141 245 E02 075 506 E02 139 515 E02 156 630 E02 141 900 E02 201 290 E02 139 662 E02 140 661 E02 077 961 E02 141 501 E02 141 301 E02 079 353 E02 201 374 E02 139 310 E02 201 451 E02 156 490 E02 156 936 E02 134 937 E02 154 642

-

OUTDOOR UNIT STRUCTURAL PARTS MUH-12NV MUH-12NV -

E1

E2

3

17

18

15

16

2

1

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

74

13

6

5

14

8

7

12

4

10

11

9

INDOOR UNIT STRUCTURAL PARTS MSH-18NV - (WH) MSH-24NV - (WH) MSH-18NV - (WH) MSH-24NV - (WH) MSH-18NV - (WH)

E1

E2

E3

1

5

3

2

6

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

Symbol

NO.

E02 138 000

1

E02 138 010

2

E02 143 234

3

E02 141 100

4

E02 141 970

5

E02 143 067

6

E02 168 007

7

E02 214 007

Part Name

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

in Wiring

Diagram

4

Q'ty/unit

MSH-18NV- MSH-24NV-

E1

(WH)

1 1 1 2 1 3 1

E3E2

(WH) 1 1 1 2 1 3 1

Optional parts

E1 E2

(WH) 1 1 1 2 1 3

1

RemarksPart No.

1PC/SET

3PCS/SET

INDOOR UNIT HEAT EXCHANGER PARTS MSH-18NV - (WH) MSH-24NV - (WH) MSH-18NV - (WH) MSH-24NV - (WH) MSH-18NV - (WH)

NO.

E02 141 620

1

E02 138 667

2

E02 176 667 E02 138 666

3

E1

E2

E3

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

Part Name

Symbol

in Wiring

Diagram

1

2

3

E1 E2E1E2 E3

1 1

1

(WH)

Q'ty/unit

MSH-24NV- MSH-18NV-

(WH)

1

1 1

RemarksPart No.

{6.35 {9.52 {15.88

75

1 2 3

4 5 6

7

8

9 10 11

12

13 14 15 16 17 18

19

NO.

E02 143 235 E02 143 040 E02 141 702 E02 141 300 E02 213 300 E02 001 505 E02 138 395 E02 320 395 E02 139 450 E02 198 450 E02 214 450 E02 141 302 E02 141 303 E02 138 329 E02 141 509 E02 198 375 E02 139 375 E02 278 375 E02 085 385 E02 141 468 E02 001 504 E02 138 307 E02 138 308 E02 127 382 E02 138 520

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

Part No.

Symbol in Wiring Diagram

Part Name

(WH)

1 1 1 1

2 1

1

1 1 1 1

1

1 1 1 1 1 1 1

MF MF

MV

TB TB TB

NR11

RT12 RT11

F11

E1

(WH)

Q'ty/unit

MSH-18NV- MSH-24NV-

1 1 1 1

2 1

1

1 1 1 1 1

1 1 1 1 1 1 1

E2 E3

1 1 1

1 2

1

1 1 1 1 1 1

1 1 1 1 1 1 1 1

(WH)

E2

1 1 1

1 2 1

1 1 1 1 1 1

1 1 1 1 1 1 1

(WH)

E1

RA4V27 -EA RA4V27 -EC 2PCS/SET

3.15A

Remarks

INDOOR UNIT ELECTRICAL PARTS MSH-18NV - (WH) MSH-24NV - (WH) MSH-18NV - (WH) MSH-24NV - (WH) MSH-18NV - (WH)

11

E1 E1 E2 E2 E3

15

3

10

8

5

4

7

16

1

2

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

76

9

6

12

17

14

OUTDOOR UNIT STRUCTURAL PARTS MUH-18NV MUH-18NV MUH-18NV -

E1

E2

E3

17

20

19

12

1

2

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

Symbol

in Wiring

Diagram

E02 141 232

1

E02 141 521

2

E02 141 245

3

E02 139 630

4

E02 139 515

5

E02 139 900

6

E02 139 290

7

E02 144 301

8

E02 141 501

9

E02 082 353

10

E02 004 340

11

E02 139 374

12

E02 198 374 E02 139 936

13

E02 139 937 E02 138 506

14

E02 139 662

15

E02 150 661

16

E02 140 233

17

E02 095 382

18

E02 139 451

19

E02 198 451 E02 139 310

20

E02 139 490

21

E02 077 961

22

E02 128 383

23

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

MC

MF

C1

52C

TB TB

F61

RT61

21S4

DSAR

8

4

10

22

15

16

9

5

14

7

3

6

Q'ty/unit

MUH-18NV-

E3E2E1

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

2 1 4 1 1 1 1 1

1 1 1 1

1 1 1 1 1 1 1 1 1 1 1

1 2 1 4 1 1 1 1

1 1 1 1 1

1 1 1 1 1 1 1 1 1 1 1

1 2 1 4 1 1 1 1

1 1 1 1 1

RemarksPart No.NO. Part Name

NH-36VMDT

RA6V50 -

50+/440V

{3.0✕{1.6✕750 {3.0✕{2.0✕800  { 6.35 {15.88

77

OUTDOOR UNIT STRUCTURAL PARTS MUH-24NVMUH-24NV-

E1

E2

13

1

17

22

24

23

2

7 5 3

11181019

8

4

20

9

78

61412 15 16

OUTDOOR UNIT

E02 139 426 E02 141 083

1 2

REMOTE CONTROLLER REMOTE CONTROLLER HOLDER

Symbol

in Wiring

Diagram

Q'ty/unit

RemarksPart No.

NO.

Part Name

1 1

MSH-07/09/12/18/24NV - (WH) MSH-18NV - (WH)

E1 E2

E3

STRUCTURAL PARTS MUH-24NVMUH-24NV-

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

1

E02 214 232

2

E02 214 521

3

E02 214 245

4

E02 214 630

5

E02 214 515

6

E02 042 900

7

E02 214 290

8

E02 214 301

9

E02 214 501

10

E02 082 353

11

E02 010 342

12

E02 198 374

13

E02 214 249

14

E02 138 506

15

E02 010 662

16

E02 010 661

17

E02 214 297

18

E02 138 351

19

E02 214 451

20

E02 214 310 E02 176 936

21

E02 256 936 E02 262 936

22

E02 214 522

23

E02 095 382

24

E02 214 381

25

E02 288 343

E1

E2

CABINET FAN GUARD SERVICE PANEL OUTDOOR HEAT EXCHANGER MOTOR SUPPORT COMPRESSOR BASE OUTDOOR FAN MOTOR PROPELLER FAN COMPRESSOR CAPACITOR CONTACTOR TERMINAL BLOCK SIDE PANEL COMPRESSOR RUBBER SET STOP VALVE(LIQUID) STOP VALVE(GAS) TOP PANEL FAN MOTOR CAPACITOR DEICER P.C. BOARD DEFROST THERMISTOR CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE REAR PANEL FUSE THERMAL READ SWITCH FAN MOTOR RELAY

Symbol

in Wiring

Diagram

MC

MF

C1

52C1

TB

C11

RT61

TRS

MUH-24NV-

ACCESSORY AND REMOTE CONTROLLER PARTS MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH) MSH-18NV - (WH) MSH-24NV - (WH) MSH-07NV - (WH) MSH-09NV - (WH) MSH-12NV - (WH) MSH-18NV - (WH) MSH-24NV - (WH) MSH-18NV - (WH)

E1

E2

E3

Q'ty/unit

MUH-24NV-

E1

1 1 1 1 1 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1

E2

1 1 1 1 1 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 1

RemarksPart No.NO. Part Name

NH-47VMDT

RA6V85 -

50+/440VAC



{ 9.52 {15.88

3.0+/440VAC

[3.0✕[1.6✕350 [3.0✕[2.0✕350 [4.0✕[2.4✕200

2A

1

2

79

9.52 (3/8)

12.7 (1/2)

15.88 (5/8)

Pipe length

Cross-section

Part No.Model

A-Gas B-Liquid

Pipe size O.D mm (in.)

Insulation

DC

Additional

refrigerant

charge R-22(g)

E1 E1 E2 E2

E2

E1

E1 E2 E3

E1 E2

MSH-07NVMSH-09NVMSH-07NVMSH-09NV-

MSH-12NVMSH-12NV-

MSH-18NVMSH-18NVMSH-18NV-

MSH-24NVMSH-24NV-

MAC-440PI MAC-441PI MAC-442PI MAC-443PI MAC-660PI MAC-661PI MAC-662PI MAC-663PI MAC-664PI MAC-670PI MAC-671PI MAC-672PI MAC-673PI

MAC-674PI MAC-860PIE MAC-861PIE MAC-862PIE MAC-863PIE MAC-864PIE

3m 5m 7m

10m

3m 5m

7m 10m 15m

3m

5m

7m 10m 15m

3m

5m

7m 10m 15m

6.35 (1/4)

9.52 (3/8)

27

31

21

27

0

150

0

150 400

0

150 400

0

195 520

,

Model

Part No.

MAC-1000FT

MAC-1100FT

E1 E2

MSH-07NV MSH-09NV MSH-12NV MSH-18NV MSH-24NV MSH-18NV-

MSH-07NV MSH-09NV MSH-12NV-

MSH-24NV MSH-18NV-

E1 E1 E1 E1

E2

E3

E2 E2 E2

Model

Part No.

E1

E2

MSH-07NV MSH-09NV MSH-12NV MSH-18NV MSH-24NV MSH-18NV-

MSH-07NV MSH-09NV MSH-12NV MSH-24NV MSH-18NV-

E1 E1 E1

E1

E3

E2 E2 E2

E2

MAC-1500DF

MAC-1600DF

13 OPTIONAL PARTS

1. REFRIGERANT PIPES

The air conditioner has flared connections its 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.

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.

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

CC

Issued in Sep. 1997. No.OB207 646

Printed in Japan

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

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

Mitsubishi MSH-07NV - E1WH, MSH-07NV - E1, MUH-07NV -E1, MSH-09NV - E1WH, MSH-09NV - E1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual