Mitsubishi MSH-A18ND Service manual

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Mitsubishi MSH-A18ND Service manual | Manualzz

OB405E.qxp 09.10.14 9:16 AM Page 1

Revision E:

• SPECIFICATION has been modified.

Please void OB405 REVISED EDITION-D.

SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT

SERVICE MANUAL

Models

MU-A18ND-

MU-A18ND-

MU-A24ND-

MU-A24ND-

S1

S2

S1

S2

MU-A30ND-

S1

MU-A30ND-

S2

MU-A18ND

No. OB405

REVISED EDITION-E

Indoor unit service manual

MS-A

ND Series (OB404)

CONTENTS

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

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

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

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

5. WIRING DIAGRAM ············································6

6. REFRIGERANT SYSTEM DIAGRAM ················8

7. PERFORMANCE CURVES ······························10

8. TROUBLESHOOTING······································12

9. DISASSEMBLY INSTRUCTIONS ····················21

10. PARTS LIST······················································27

11. RoHS PARTS LIST···········································30

NOTE:

• This service manual describes technical data of the outdoor units.

• RoHS compliant products have <G> mark on the spec name plate.

For servicing of RoHS compliant products, refer to the RoHS Parts List.

TM

OB405E.qxp 09.10.14 9:16 AM Page 2

Revision A:

• Check of solenoid valve coil has been partially modified.

Revision B:

• MU-A24ND -

S2 has been added.

Revision C:

• MU-A18ND -

S2 has been added.

Revision D:

• MU-A30ND -

S2 has been added.

Revision E:

• SPECIFICATION has been modified.

1 TECHNICAL CHANGES

Frequency

New Model

Old Model

Compressor: NH30VCD ➞ RH247NRAT

Compressor: RH277NHD

➞ RH247NRAT

Electricity receiving unit: Indoor unit ➞ Outdoor unit

Gas pipe diameter: [15.88 ➞ [12.7

Rated voltage: 220V ➞ 220-230V w : change

60Hz

MU-A18ND -

S1

MU-18TN - S1 w

MU-18SN - C1 w w w w w w w

Frequency

New Model

Old Model

Outdoor unit:Unit size:W850mm oH605mmoD290mm ➞ W840mmoH850mmoD330mm

Outdoor unit:Unit size:W870mm oH850mmoD295mm ➞ W840mmoH850mmoD330mm

Compressor: NH38NBD ➞ PH33NPBT

Electricity receiving unit: Indoor unit ➞ Outdoor unit

Liquid refrigerant pipe diameter: [9.52 ➞ [6.35

Rated voltage: 220V ➞ 220-230V

60Hz

MU-A24ND -

S1

MU-24TN - S1 MU-24SN - C2 w w w w w w w w w w

MU-A30ND -

New model

S1

MU-A18ND -

S1

MU-A18ND

-

• Valve cover has been added.

S2

MU-A24ND -

S1

MU-A24ND

-

• Compressor contactor has been added.

S2

MU-A30ND -

S1

MU-A30ND

-

S2

• Solenoid valve and solenoid valve coil have been changed.

OB405E.qxp 09.10.14 9:16 AM Page 3

2 PART NAMES AND FUNCTIONS

OUTDOOR UNIT

MU-A18ND MU-A24ND MU-A30ND

Air inlet

Piping

Drain hose

Air outlet

Air inlet

(back and side)

Air outlet

Drain outlet

3 SPECIFICATION

Outdoor model

Function

MU-A18ND

Power supply

Capacity

Dehumidification

Air flow (High/Low)

Power outlet kW

R /h

K /h

A

Running current (Total)

Power input (Total)

Power factor (Total)

A

W

%

A Starting current (Total)

Compressor motor current

Fan motor current

A

A

Coefficient of performance (C.O.P) (Total)

Model

Output W

Winding resistance (at 20:)

"

Model

Winding resistance (at 20:)

Dimensions W

OHOD

Weight

" mm kg dB rpm

Sound level (High/Low)

Fan speed (High/Low)

Fan speed regulator

Refrigerant filling

capacity (R22)

Refrigeration oil (Model) kg cc

1.40

520 (MS56)

NOTE: Test conditions are based on ISO 5151 / SSA 385

Cooling : Indoor DB27°C WB19°C / DB29°C WB19°C

Outdoor DB35°C WB24°C / DB46°C WB24°C

Indoor-Outdoor piping length: 5 / 7.5 m

ISO 5151

5.10

2.3

2,480

15

SSA 385

4.40

1.8

8.52

1,800

96-92

9.94

2,100

96

40

7.60

9.02

0.55

2.83

RH247NRAT

1,200

C-R 1.43

2.10

C-S 2.06

RA6V60-MA

WHT-BLK 71.2

BLK-RED 89.3

850 o605o290

44

54

945

1

3

MU-A24ND MU-A30ND

Cooling

Single phase

220-230V, 60Hz

ISO 5151

6.6

3.2

SSA 385

5.9

2.7

15( )

2,880

20( )

10.54

2,250

97-93

9.50

58

0.66

12.42

2,650

97

11.39

2.93

2.23

PH33NPBT

1,500

ISO 5151

8.1

4.3

SSA 385

6.6

3.2

2,880/1,380

25

14.25

3,010

96-92

17.52

3,700

96

78

13.22

16.49

0.66

2.69

1.78

NH44NAVT

2,000

C-R 0.84

C-S 2.09

RA6N75-BA

C-R 0.62

C-S 1.40

RA6N75-AA

WHT-BLK 65.0

BLK-RED 65.4

67

WHT-BLK 64.2 BLK-YLW 32.9

YLW-RED 32.7

840 o850o330

76

54

790

1

55/51

790/490

2

2.20

900 (MS32N1)

2.40

1,300 (MS32N1)

OB405E.qxp 09.10.14 9:16 AM Page 4

4 OUTLINES AND DIMENSIONS

MU-A18ND -

S1

OUTDOOR UNIT

Drainage hole [16.2

355

350

Air in

20

REQUIRED SPACE

100mm or more

100mm or more

Unit: mm

Air in

Drainage

3holes [33

Air out

50

30

50

183

500

850

MU-A18ND -

S2

74

-

30

500mm or more

Service panel

Liquid refrigerant pipe joint

Refrigerant pipe

35

-

(Flared) [6.35

161

Gas refrigerant

pipe joint

Refrigerant pipe

(flared) [12.7

REQUIRED SPACE

Drainage hole [16.2

355

350

Air in

20

100mm or more

100mm or more

350mm or more

Air in

Drainage

3holes [33

Air out

50

30

50

183

500

850

74

81

500mm or more

-

30

Service panel

Liquid refrigerant pipe joint

Refrigerant pipe

35

-

(Flared) [6.35

161

Gas refrigerant

pipe joint

Refrigerant pipe

(flared) [12.7

350mm or more

4

OB405E.qxp 09.10.14 9:16 AM Page 5

MU-A24ND MU-A30ND

OUTDOOR UNIT

66

299

515

40

REQUIRED SPACE

100mm or more

Open as a rule

500mm or more if the front and both sides are open

100mm or more

200mm or more if there are obstacles to both sides

500

840

121

80

Open as a rule

500mm or more if the back, both sides and top are open

350mm or more

198

Service panel

30

Liquid refrigerant pipe joint

Refrigerant pipe

(flared) [6.35(MU-A24ND)

[ 9.52(MU-A30ND)

35

Gas refrigerant pipe joint

Refrigerant pipe

(flared) [15.88

5

OB405E.qxp 09.10.14 9:16 AM Page 6

5 WIRING DIAGRAM

MU-A18ND

OUTDOOR UNIT

220-230V~

TB2

2

N

WHT

WHT

C2

RED

ORN

BLU

RED

ORANGE

WHITE

BLACK

MF

220-230V~

L

BRN

TB1

L

N

GRN/YLW

BLU

C

C1

RED

BLK

S

MC

R

SYMBOL

C1

C2

DSAR

NAME

COMPRESSOR CAPACITOR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

SYMBOL

F

MC

MF

NAME

FUSE (3.15A)

COMPRESSOR(INNER PROTECTOR)

OUTDOOR FAN MOTOR(INNER PROTECTOR)

NOTES: 1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

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

3.Symbols below indicate.

: Terminal block, : Connector

SYMBOL

TB1

TB2

NAME

TERMINAL BLOCK

TERMINAL BLOCK

MU-A24ND-

S1

OUTDOOR UNIT

L

TB1

N

PE

BRN

BLU

C1

RED

S

MC

BLK

BLU

WHT

BLK

4

3

2

WHT

ORN

RED

1

MF

R

C

220-230V~

220-230V~

2

TB2

N

L

C2

WHT

SYMBOL

C1

C2

DSAR

NAME

COMPRESSOR CAPACITOR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

SYMBOL

F

MC

MF

NAME

FUSE(3.15A)

COMPRESSOR(INNER PROTECTOR)

OUTDOOR FAN MOTOR(INNER PROTECTOR)

SYMBOL

TB1

TB2

NAME

TERMINAL BLOCK

TERMINAL BLOCK

NOTES: 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 (2,N,L).

3.Symbols below indicate.

: Terminal block, : Connector

6

OB405E.qxp 09.10.14 9:16 AM Page 7

MU-A24ND-

S2

OUTDOOR UNIT

220-230V~

220-230V~

L

TB1

N

PE

2

TB2

N

L

BLU

BRN

BRN

BLU

WHT

5

52C

6

C1

1

52C

RED

4

S

MC

C

BLK

R

BLU

4

BLK

WHT

ORN

3

2

1

WHT

ORN

RED RED

MF

C2

DSAR

SYMBOL

C1

C2

DSAR

NAME

COMPRESSOR CAPACITOR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

SYMBOL

F

MC

MF

NAME

FUSE(3.15A)

COMPRESSOR(INNER PROTECTOR)

OUTDOOR FAN MOTOR(INNER PROTECTOR)

SYMBOL

TB1

TB2

52C

NAME

TERMINAL BLOCK

TERMINAL BLOCK

COMPRESSOR CONTACTOR

NOTES: 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 (2,N,L).

3.Symbols below indicate.

: Terminal block, : Connector

MU-A30ND

MF

OUTDOOR UNIT

RT62 RT63

LEV

6

6 5 4 3 2 1

RED

ORN C2

L

TB1

12V

N

3

TB2

N

PE

X63

CN662

X52

DEICER

P.C. BOARD

T61

CN724

SR62

SR61

1 2 3 CN711

X63

CN722

1

2

3

COM NO

X52

TAB52

COM NO

F61

1

3

5

CN730

RED

BLU

21S2

220-230V~ 2

BRN

BLU

1

52C

2 WHT

C

C1

RED

BLK

S MC R

WHT

BLU A1

52C

A2 BLU

SYMBOL

C1

C2

DSAR

F61

LEV

MC

MF

COMPRESSOR CAPACITOR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

FUSE(3.15A)

NAME

EXPANSION VALVE COIL

COMPRESSOR(INNER PROTECTOR)

OUTDOOR FAN MOTOR(INNER PROTECTOR)

SYMBOL

NR61

RT62

RT63

SR61

SR62

TB1

TB2

VARISTOR

NAME

DISCHARGE TEMPERATURE THERMISTOR

AMBIENT TEMPERATURE THERMISTOR

SOLID STATE RELAY

SOLID STATE RELAY

TERMINAL BLOCK

TERMINAL BLOCK

SYMBOL

T61

X52

X63

21S2

52C

NAME

TRANSFORMER

CONTACTOR

SOLENOID VALVE COIL RELAY

SOLENOID VALVE COIL

COMPRESSOR CONTACTOR

NOTES: 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,N,2).

3.Symbols below indicate.

: Terminal block, : Connector

7

OB405E.qxp 09.10.14 9:16 AM Page 8

6 REFRIGERANT SYSTEM DIAGRAM

MU-A18ND

OUTDOOR UNIT

Refrigerant pipe

{ 12.7

(with heat insulator)

Stop Valve

(with service port)

Outdoor heat exchanger

Flared connection

Stop Valve

Refrigerant pipe

{ 6.35

(with heat insulator)

MU-A24ND

OUTDOOR UNIT

Refrigerant pipe

[ 15.88

(with heat insulator)

Flared connection

Stop valve

(with service port)

Capillary tube

[ 3.0 x [1.8 x 400

Strainer

#100

Compressor

Strainer

#100

Outdoor heat exchanger

Unit : mm

Accumulator

Compressor

Flared connection

Refrigerant pipe

[ 6.35

(with heat insulator)

Stop valve Capillary tube

[ 3.0 x [2.0 x 550

Refrigerant flow in cooling

8

OB405E.qxp 09.10.15 1:32 PM Page 9

MU-A30ND

OUTDOOR UNIT

Refrigerant pipe

[15.88

(with heat insulator)

Flared connection

Stop valve

(with service port)

Discharge temperature thermistor

RT62

Strainer

#100

Outdoor heat exchanger

Flared connection

Accumulator

[ 4.2 x [3.0 x 50

Compressor

Capillary tube

[ 4.0 x [2.4 x 200

Solenoid valve

LEV

(Expansion valve)

Strainer

#100

Ambient temperature thermistor

RT63

Capillary tube

[ 4.0 x [2.4 x 100

Refrigerant pipe

[ 9.52

(with heat insulator)

Stop valve Capillary tube

[ 3.6 x [2.4 x 50

Refrigerant flow in cooling

MAX.REFRIGERANT PIPING LENGTH and MAX.HEIGHT DIFFERENCE

Piping size O.D : mm

Model

Refrigerant piping : m

Max. length

A

Max. Height difference

B

Gas Liquid

{ 12.7

MU-A18ND

MU-A24ND

MU-A30ND

30 15

{ 15.88

{ 6.35

{ 9.52

Indoor unit

Unit : mm

Max. Height difference

B

Max. length

A

Outdoor unit

ADDITIONAL REFRIGERANT CHARGE(R22 : g)

Model Outdoor unit precharged

7m

MU-A18ND

MU-A24ND

MU-A30ND

1,400

2,200

2,400

0

Refrigerant piping length (one way)

10m 15m 20m

45 120 195

30m

345

NOTE : Calculation : Xg=15g/m ✕ (Refrigerant piping length (m)-7)

9

OB405E.qxp 09.10.14 9:16 AM Page 10

7 PERFORMANCE CURVES

MU-A18ND MU-A24ND MU-A30ND

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions.

Since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

198 ~ 253V, 60Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature :

(2) Indoor outlet air wet-bulb temperature :

(3) Outdoor intake air dry-bulb temperature :

(4) Total input:

°CWB

°CWB

°CDB

W

Indoor air wet/dry-bulb temperature difference on the left side of the following chart 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/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 the room.

5. Press the EMERGENCY OPERATION switch once to start the EMERGENCY COOL 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.

INDOOR UNIT OUTDOOR UNIT

9.9

9.1

12.5

11.4

18.6

16.8

8.3

7.5

6.7

10.3

9.3

15.1

13.5

8.3

12.0

5.9

7.3

10.5

Wet and dry-bulb thermometers

Indoor intake air WB temperature (:)

Outdoor intake air DB temperature (:)

Wet-and dry-bulb thermometers

Indoor intake air WB temperature (:)

Outdoor intake air DB temperature (:)

10

OB405E.qxp 09.10.14 9:16 AM Page 11

OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

COOL operation

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

Relative humidity (%) Dry-bulb temperature (:)

20 50

25 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).

(kgf/F [Gauge])(MPa [Gauge])

8.0

0.8

MU-A18ND

8.0

MU-A18ND

7.0

0.7

7.0

6.0

0.6

6.0

5.0

0.5

5.0

4.0

0.4

3.0

0.3

15 18 20

50

25 30

70

32 35 (:)

(%)

Ambient temperature (˚C)/Ambient humidity (%)

4.0

15 18 20

50

25

60

30

70

32 35(:)

(%)

Ambient temperature (˚C)/Ambient humidity (%)

(kgf/F [Gauge])(MPa [Gauge])

8.0

0.8

7.0

0.7

6.0

0.6

0.5

5.0

MU-A24ND

10.0

9.0

8.0

7.0

MU-A24ND

4.0

0.4

3.0

0.3

15 18 20 25

50 60 70 (%)

Ambient temperature (˚C)/Ambient humidity (%)

6.0

5.0

15 18 20 25

50 60 70 (%)

Ambient temperature (˚C)/Ambient humidity (%)

11

OB405E.qxp 09.10.14 9:16 AM Page 12

(kgf/F[Gauge])(MPa[Gauge])

6.0

0.6

5.0

4.0

3.0

0.5

0.4

0.3

MU-A30ND

2.0

0.2

15 18 20

50

25

60 70 (%)

Ambient temperature (˚C)/Ambient humidity (%)

MU-A30ND

15.0

14.0

13.0

12.0

11.0

10.0

9.0

15 18 20

50

25

60

30 32

70

35(:)

(%)

Ambient temperature (˚C)/Ambient humidity (%)

8 TROUBLESHOOTING

MU-A18ND MU-A24ND MU-A30ND

8-1. Cautions on troubleshooting

1. Before troubleshooting, check the following:

1) Check the power supply voltage.

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

2. Take care the following during servicing.

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

2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel and the electronic control P.C. board.

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

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

Lead wiring

Housing point

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) Before servicing that the connector and terminal are connected properly.

3) 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 discolouration.

4) When troubleshooting, refer to 8-2.

12

OB405E.qxp 09.10.14 9:16 AM Page 13

8-2. Instruction of troubleshooting

Start

Indoor unit operates.

Outdoor unit dose not operate.

Indoor unit operates.

Outdoor unit dose not operate normally.

Indoor unit dose not receive the signal from remote controller.

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

Outdoor unit operates in only Test Run operation.

w

MU-A30ND

Outdoor unit dose not operate even in

Test Run operation.

w

MU-A24ND - S2

MU-A30ND

Outdoor unit dose not stop even if indoor unit stop.

MU-A30ND

Outdoor unit repeats start and stop.

Indoor unit operates, when

EMERGENCY

OPERATION switch is pressed.

Indoor unit dose not operate, when

EMERGENCY

OPERATION switch is pressed.

Check room temperature thermistor.

Refer to

"Test point diagram and voltage".

Refer to

8-4. A

"Check of outdoor unit".

Refer to

8-4. B

"Check of outdoor unit".

Refer to

8-4. F

"Check of solenoid valve coil".

Refer to

"Check of remote controller and receiver

P.C. board".

1. Check indoor /

outdoor

connecting wire.

2. Check of

outdoor fuse.

(MU-A18/A24ND)

3. Refer to

"Check of indoor

electronic control

P.C. board".

MS-A30ND

Flash on and off at 0.5-second intervals

Cause:

Indoor/

Outdoor unit

• Mis-wiring

2-time flash

Cause:

Indoor unit

• Trouble of

room temp-

erature/

indoor coil

thermistor

3-time flash

Cause:

Indoor unit

• Trouble of

indoor fan

motor

4-time flash

Cause:

Indoor unit

• Trouble of

indoor

control

system

MU-A30ND

6-time flash

Cause:

Outdoor unit

• Trouble of

thermistor

in outdoor

unit

MU-A30ND

7-time flash

Cause:

Outdoor unit

• Trouble of

outdoor

control

system

MU-A30ND

10-time flash

Cause:

Outdoor unit

• Trouble of

low discharge

temperature

protection

Refer to

8-4. C

"How to check mis-wiring

(When outdoor unit dose not work)" .

Check room temperature thermistor and indoor coil thermistor.

Refer to

"Test point diagram and voltage".

Refer to

"Check of indoor fan motor".

Replace the indoor electronic control

P.C. board.

Refer to

8-4. E

"Check of outdoor thermistor".

Replace the deicer

P.C. board.

Refer to

8-4. D

"Check of

LEV".

w

Refer to indoor unit service manual.

"Test Run operation" means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed.

13

OB405E.qxp 09.10.14 9:16 AM Page 14

8-3. Trouble criterion of main parts

MU-A18ND MU-A24ND MU-A30ND

Part name

Discharge temperature thermistor(RT62)

MU-A30ND

Ambient temperature thermistor(RT63)

MU-A30ND

Check method and criterion

Measure the resistance with a tester.

Before measurement, hold the thermistor with your hands to warm it up.

(Part temperature 0˚C ~ 40˚C)

Refer to 8-5. "Test point diagram and voltage", "Outdoor deicer P.C. board", the chart of thermistor.

Measure the resistance with a tester.

(Part temperature –10˚C ~ 40˚C)

Refer to 8-5. "Test point diagram and voltage", "Outdoor deicer P.C. board", the chart of thermistor.

Compressor

(MC)

INNER

PROTECTOR

155 i 5: OPEN

90 i10: CLOSE

Measure the resistance between the terminals with a tester.

(Coil wiring temperature -10 °C ~ 40°C)

Color of lead wire

C – R

C – S

MU-A18ND

1.26 " ~ 1.55 "

1.81 " ~ 2.23 "

Normal

MU-A24ND

0.74 " ~ 0.91 "

1.84 " ~ 2.26 "

MU-A30ND

0.54 " ~ 0.67 "

1.23 " ~ 1.52 "

Outdoor fan motor

(MF)

INNER

PROTECTOR

135 i 5: OPEN

87 i15: CLOSE

Measure the resistance between the terminals with a tester.

(Coil wiring temperature -10 °C ~ 40°C)

Color of lead wire

WHT – BLK

BLK – RED

BLK – YLW

YLW – RED

MU-A18ND

63 " ~ 77 "

79 " ~ 96 "

Normal

MU-A24ND

57 " ~ 70 "

58 " ~ 71 "

MU-A30ND

57 " ~ 69 "

29 " ~ 35 "

29 " ~ 35 "

Figure

S

RED

C

WHT

P

R

BLK

MAIN

AUX.

BLK RED ORN WHT

MU-A18/A24ND

AUX.

MAIN

BLK YLW RED ORN WHT

MU-A30ND

WHT

6

RED

1

ORN

4

LEV

LEV(Expansion valve)

MU-A30ND

Solenoid valve coil

(21S2)

MU-A30ND

Measure the resistance with a tester.

(Part temperature : 0˚C ~ 40˚C)

Normal Color of lead wire

WHT – RED

RED – ORN

YLW – BRN

BRN – BLU

37.4 " ~ 53.9 "

Measure the resistance with a tester.

(Part temperature : –10˚C ~ 40˚C)

Normal

MU-A30ND -

S1

1,738 " ~ 2,125 "

MU-A30ND -

S2

1,230 " ~ 1,330 "

P :INNER PROTECTOR

14

OB405E.qxp 09.10.14 9:16 AM Page 15

8-4. Troubleshooting flow

Compressor and / or outdoor fan motor dose not operate.

A Check of outdoor unit

MU-A30ND

Turn ON the power supply.

Is there 220-230V AC to between L N on the outdoor terminal block ?

Yes

No

Check the outdoor power supply and connection of wiring.

Compressor dose not operate.

Check the deicer P.C. board. Refer to 8-5.

Is there 5V DC?

Yes

Press the EMERGENCY

OPERATION switch.

3-minute time delay works.

Test run operation operates for 30 minutes.

No

Is there 220-230V AC CN730 on the deicer P.C. board?

No

Yes

Replace the deicer P.C. board.

Make the connection of wiring correct.

Is there 220-230V AC between A1 and A2 on the compressor contactor (52C)?

No

Yes

Is there 220-230V AC between

2 on the compressor contactor(52C) and N on the outdoor terminal block?

Yes

No

Replace the deicer P.C. board.

Replace the compressor contactor(52C).

Check the compressor.

Outdoor fan motor dose not operate.

Check the deicer P.C. board. Refer to 8-5.

Is there 5V DC?

Yes

Press the EMERGENCY

OPERATION switch.

3-minute time delay works.

Test run operation operates for 30 minutes.

No

Is there 220-230V AC

CN711 1-3 or 2-3 on the deicer P.C. board?

Yes

Check the outdoor fan motor. Refer to 8-3.

No

Is there 220V AC CN730 on the deicer P.C. board?

Yes

Replace the deicer P.C. board.

No

Replace the deicer P.C. board.

Make the connection of wiring correct.

15

OB405E.qxp 09.10.14 9:16 AM Page 16

Compressor and / or outdoor fan motor dose not stop.

B Check of outdoor unit

MU-A24ND - S2

1 Turn OFF the power supply.

2 After 30 seconds, turn ON the power supply again.

3 Operate the unit in COOL mode by pressing the

EMERGENCY OPERATION switch.

4 Operate the unit for 1 minute or more and stop it by

pressing the EMERGENCY OPERATION switch again.

After 30 seconds, does compressor stop ?

Yes

OK

No

After 30 seconds, does outdoor fan motor stop ?

OK

Yes

No

Is there 220-230V AC between 3-N on the outdoor terminal block?

Yes

Is there 220-230V AC between 3-N on the indoor terminal block?

Yes

Replace the indoor electronic control P.C. board.

No

Is there 220-230V AC between 3-N on the outdoor terminal block?

Yes

No

Is there 220-230V AC between 3-N on the indoor terminal block?

Yes

Replace the indoor electronic control P.C. board.

No

No

Is there 220-230V AC between 1 on the compressor

No contactor(52C) and N on the outdoor terminal block?

Yes

Replace the compressor contactor(52C).

Reconnect the continuity of indoor and outdoor unit connection.

Is there 220-230V AC between 3 on the compressor contactor(52C) and N on the outdoor terminal block?

Yes

Replace the compressor contactor(52C).

Reconnect the continuity of indoor and outdoor unit connection.

No

Make the connection of wiring correct.

Make the connection of wiring correct.

MU-A30ND

1 Turn OFF the power supply.

2 After 30 seconds, turn ON the power supply again.

3 Operate the unit in COOL mode by pressing the

EMERGENCY OPERATION switch.

4 Operate the unit for 1 minute or more and stop it by

pressing the EMERGENCY OPERATION switch again.

After 30 seconds, did compressor stop?

Yes

Ok

After 30 seconds, did outdoor fan stop?

Yes

Ok

No Is there 220-230V AC between A1 and A2 on the compressor contactor (52C)?

Yes

Replace the deicer P.C. board.

No

Is there 220-230V AC between

2 on the compressor contactor(52C) and N on the outdoor terminal block?

Yes

Replace the compressor contactor(52C).

No

No

Replace the deicer P.C. board.

Make the connection of wiring correct.

16

OB405E.qxp 09.10.14 9:16 AM Page 17

When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.

Outdoor unit dose not operate.

C How to check mis-wiring MU-A30ND w Short circuit of JPG and JPS on the indoor electronic control

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

Start

• Turn ON the power supply.

• Press EMERGENCY OPERATION switch once.

When the unit has mis-wiring, in 3 minutes,

OPERATION INDICATOR lamp on indoor unit flash on and off at 0.5 second intervals. w

Make them sure.

Yes

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

No

1. Turn OFF the power supply and disconnect only terminal block 3 of indoor/ outdoor connecting wire on indoor side.

2. Short-circuit terminal block N-3 by lead wire.

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

Is there 1V DC detected between both ends of PS132 on the indoor electronic control P.C. board ?

However, the stylus of a tester would be between 0 and 20V.

Yes

• Turn OFF the power supply.

• Disconnect the lead wire that terminal

block N-3 is short-circuited.

• Connect ON indoor/outdoor connecting wire.

No Replace the indoor electronic control P.C. board.

Turn ON the power supply.

Is there 220-230V AC between L-N on the outdoor terminal block?

Yes

Is there 5V DC between J101 + -J401 - ?

(Refer to 8-5.)

Yes

When EMERGENCY OPERATION is operated, is there 10V DC between both ends of R601 on the deicer P.C. board?

(Refer to 8-5.)

However the stylus of a tester would be between 5 ~10V.

Yes

Replace the deicer P.C. board.

No

No

No

Check the outdoor power supply and connection of wiring.

Replace the deicer P.C. board.

Make the wiring between CN730 on the deicer P.C. board and outdoor terminal block correct.

(Refer to 8-5.)

Refer to indoor unit service manual.

17

OB405E.qxp 09.10.14 9:16 AM Page 18

When OPERATION INDICATOR lamp flashes 10-time.

Cooling mode dose not operate.

D Check of LEV (Expansion valve) MU-A30ND

Remote controller model : KP0B

Turn ON the power supply.

1 While pressing OPERATION

SELECT button on the remote

controller, press RESET button.

2 Release RESET button to confirm

if all LCD in operation display

section of the remote controller is

displayed.

3 Release OPERATION SELECT

button.

Remote controller model : KM04B

Turn ON the power supply.

1 While pressing both OPERATION

SELECT button and TOO COOL

button on the remote controller at the

same time, press RESET button.

2 First, release RESET button.

And release the other two buttons

after all LCD in operation display

section of the remote controller is

displayed after 3 seconds.

With remote controller set toward the indoor unit, press

OPERATE/ STOP(ON/ OFF) button and confirm one beep tone.

KP0B KM04B

LEV operates in full-opening direction.

˚C

CLOCK

AMPM

AMPM

˚C

CLOCK

AMPM

AMPM

Do you hear the expansion valve

"click, click·······"?

Do you feel the expansion valve vibrate on touching it?

No

Is LEV properly fixed to

the expansion valve?

Yes

Does the resistance of LEV have the characteristics on 8-3?

No

Replace the LEV.

Yes

No

Yes

Ok

Properly fix LEV coil to the expansion valve.

Replace the deicer P.C. board.

NOTE : After check of LEV, do the undermentioned operation.

1. Turn OFF the power supply and turn ON again.

2. Press the RESET button on the remote controller.

When OPERATION INDICATOR lamp flashes 6-time.

Thermistors in the outdoor unit are abnormal.

E Check of outdoor thermistor

MU-A30ND w Disconnect the connectors CN662 from the deicer P.C. board. (Check the characteristics of each thermistor.)

Discharge temperature thermistor(RT62)

Measure resistance between CN 662

1 and 2.

Replace the deicer P.C. board.

Turn OFF the power supply.

Ambient temperature thermistor(RT63)

Measure resistance between CN 662

3 and 4.

Does the resistances of thermistor have the characteristics on 8-5.?

No

Replace the thermistor.

Yes

Connect CN662.

Turn ON the power supply and press the EMERGENCY

OPERATION switch.

No

Does the unit operate

10 minutes or more?

Yes

Ok

W

W Defective contact of the connector is considered.

18

OB405E.qxp 09.10.14 9:16 AM Page 19

F Check of solenoid valve coil

Outdoor unit repeats start and stop.

Turn ON the power supply.

Operate the unit in COOL mode by pressing the EMERGENCY OPERATION switch.

MU-A30ND

After 1minute or more has passed since the compressor started, operate the solenoid valve coil by heating or cooling the ambient temperature thermistor.

(Refer to Solenoid valve control.)

Do you hear "click" from the solenoid valve coil

Ok

?

Yes

No

Turn ON the solenoid valve coil.

(Refer to Solenoid

valve control.)

Is there 220-230V AC

CN722 on the deicer

P.C. board?

Yes

Check of the solenoid valve coil.

(Refer to 8-3.)

No

Replace the deicer P.C. board.

Solenoid valve control

The solenoid valve opens when the ambient temperature thermistor RT63 temperature reaches 49.2: or more after 1 minute has passed since the compressor turned on. Then, the solenoid valve maintains to open until the ambient temperature thermistor RT63 temperature falls 46.2: or less.

Ambient temperature thermistor

RT63 temperature

Solenoid valve ON

OFF

46.2:49.2:

NOTE: The solenoid valve remains to close when the ambient temperature thermistor RT63 temperature is 49.2: or less after 1 minute has passed since the compressor turned on.

19

OB405E.qxp 09.10.14 9:16 AM Page 20

8-5. Test point diagram and voltage

MU-A30ND

Outdoor deicer P.C. board

600

500

400

300

900

Discharge temperature thermistor(RT62)

800

700

200

100

0

0 10 20 30 40 50 60 70 80 90 100 110 120

Temperature(:)

Ambient temperature thermistor (RT63)

100

90

80

70

60

50

40

30

20

10

0

-20 -10 0 10 20 30 40

Temperature(:)

CN662 1-2

Discharge temperature thermistor (RT62)

(Refer to 8-4.

E.)

CN662 3-4

Ambient temperature thermistor

(RT63)

(Refer to 8-4.

E.)

LEV connector

(CN724)

Fan motor connector

(CN711)

Varistor

(NR62)

J101

5V

DC

J401

(Refer to

8-4. C.)

}

+

+

R601

10V DC

(Refer to

8-4. C.)

Solenoid valve coil

(CN722)

+

}

12V DC

Fuse

3.15A / 250V

Varistor (NR61)

} CN730 1-3

220-230-240V

AC

(Refer to

8-4. A or C.)

20

OB405E.qxp 09.10.14 9:16 AM Page 21

9

DISASSEMBLY INSTRUCTIONS

<"Terminal with locking mechanism" Detaching points>

The terminal which has the locking mechanism can be detached as shown below.

There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism.

The terminal without locking mechanism can be detached by pulling it out.

Check the shape of the terminal before detaching.

(1) Slide the sleeve and check if there is a locking lever or not.

(2) The terminal with this connector has the

locking mechanism.

Sleeve

Locking lever

1Slide the sleeve.

2Pull the terminal while

pushing the locking

lever.

1Hold the sleeve, and

pull out the terminal

slowly.

Connector

9-1. MU-A18ND

OUTDOOR UNIT

OPERATING PROCEDURE

1. Removing the cabinet

(1) Remove the screws of the cabinet.

(2) Hold the bottom of the cabinet on both sides to remove the cabinet.

(3) Remove the screws of the service panel and remove the service panel.

(4) Remove the screw of the valve cover and remove the valve cover (MU-A18ND-

S2

).

Photo 1

Screws of the cabinet

PHOTOS

Screws of the

Service panel

Screw of the valve cover

Photo : MU-A18ND - S2

Photo 2

Screws of the cabinet

21

OB405E.qxp 09.10.14 9:16 AM Page 22

OPERATING PROCEDURE

2. Removing the electrical parts

(1) Remove the service panel and the cabinet.

(2) Remove the following parts.

•Compressor capacitor (C1)

•Outdoor fan capacitor (C2)

•Terminal blocks (TB1,TB2)

Photo 3

PHOTOS

Outdoor fan capacitor(C2)

3. Removing the outdoor fan motor

(1) Remove the cabinet. (Refer to 1.)

(2) Disconnect the connector remove the hooked lead wire from the fan motor.

(3) Remove the propeller nut and remove the propeller.

(4) Remove screws fixing the fan motor.

Compressor capacitor(C1) Terminal blocks(TB1,TB2)

Photo 4

Propeller nut

Set screws of outdoor fan motor

Hook

Propeller Set screws of

Outdoor 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) Disconnect lead wires from the glass terminal of the compressor.

(5) Recover gas from the refrigerant circuit.

NOTE:

Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0MPa).

(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 5

Compressor

Discharge pipe

Suction pipe

Compressor nuts

22

OB405E.qxp 09.10.14 9:16 AM Page 23

9-2. MU-A24ND

OUTDOOR UNIT

OPERATING PROCEDURE

1.Removing the cabinet

(1) Remove the screw of the service panel.

(2) Remove the screws of the top panel.

(3) Remove the screw of the valve cover.

(4) Remove the service panel.

(5) Remove the top panel.

(6) Remove the valve cover.

(7) Remove the screws of the front panel.

(8) Remove the front panel.

(9) Remove the screws of the back panel.

(10) Remove the back panel.

Photo 1

PHOTOS

Screw of the top panel

Screws of the cabinet

Photo 3

Screw of the motor support

Photo 2

Screws of the cabinet

Screw of the service panel

Screws of the back panel

Screws of the top panel

Screws of the front panel

Set screws of the back panel

2. Removing the electrical parts

(1) Remove the service panel and the cabinet.

(2) Remove the following parts.

•Compressor capacitor (C1)

•Outdoor fan capacitor (C2)

•Terminal blocks (TB1,TB2)

•Compressor contactor (52C) (MU-A24ND- S2 )

Photo 4

Compressor contactor

(MU-A24

NDS2 )

Screw of the valve cover

Screws of the relay panel

Terminal blocks

(TB1,TB2)

23

Screws of the relay panel

Screws of the

Compressor

Outdoor fan relay capacitor (C1) capacitor (C2) panel

Photo : MU-A24ND -

S2

OB405E.qxp 09.10.14 9:16 AM Page 24

OPERATING PROCEDURE

3. Removing the propeller and the outdoor fan motor

(1) Remove the cabinet. (Refer to 1.)

(2) Remove the propeller nut and the propeller.

NOTE : Loose the propeller in the rotating direction for removal.

When attaching the propeller, align the mark on the propeller and the motor shaft cut section.

Set the propeller in position by using the cut on the shaft and the mark on the propeller.

(3) Remove the clamp of outdoor fan motor lead wire and disconnect the outdoor fan motor connector.

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

(5) Remove the outdoor fan motor.

Photo 5

Propeller nut

Propeller

PHOTOS

Set screws of the outdoor fan motor

4. Removing the compressor

(1) Remove the cabinet. (Refer to 1.)

(2) Remove the relay panel.

(3) Remove the soundproof felt.

(4) Remove the terminal cover on the compressor.

(5) Disconnect lead wires from the compressor.

(6) Recover gas from the refrigerant circuit.

NOTE:

Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa).

(7) Disconnect the welded part of the discharge pipe.

(8) Disconnect the welded part of the suction pipe.

(9) Remove nuts fixing the compressor.

(10) Remove the compressor.

Photo 6

Discharge pipe

Suction pipe

Set screws of the outdoor fan motor

Photo : MU-A24ND - S2

Terminal cover

Compressor nuts

24

OB405E.qxp 09.10.14 9:16 AM Page 25

9-3. MU-A30ND

OUTDOOR UNIT

OPERATING PROCEDURE

1.Removing the cabinet

(1) Remove the screw of the service panel.

(2) Remove the screws of the top panel.

(3) Remove the screw of the valve cover.

(4) Remove the service panel.

(5) Remove the top panel.

(6) Remove the valve cover.

(7) Remove the screws of the front panel.

(8) Remove the front panel.

(9) Remove the screws of the back panel.

(10) Remove the back panel.

Photo 1

PHOTOS

Screw of the top panel

Screws of the cabinet

Photo 3

Screw of the motor support

Photo 2

Screws of the cabinet

Screw of the service panel

Screws of the back panel

Set screws of the back panel

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.

Screws of the top panel

Screws of the front panel

Screw of the valve cover

Photo 4 Deicer P.C. board

Terminal blocks

(TB1,TB2)

Screws of the relay panel

Screws of the relay panel

Compressor contactor

(52C)

Compressor capacitor(C1)

Outdoor fan capacitor (C2)

25

OB405E.qxp 09.10.14 9:16 AM Page 26

OPERATING PROCEDURE

3. Removing the propeller and the outdoor fan motor

(1) Remove the cabinet. (Refer to 1.)

(2) Remove the propeller nut and the propeller.

NOTE : Loose the propeller in the rotating direction for removal.

When attaching the propeller, align the mark on the propeller and the motor shaft cut section.

Set the propeller in position by using the cut on the shaft and the mark on the propeller.

(3) Remove the clamp of outdoor fan motor lead wire and disconnect the outdoor fan motor connector.

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

(5) Remove the outdoor fan motor.

Photo 5

Propeller nut

PHOTOS

Set screws of the outdoor fan motor

Propeller

Set screws of the outdoor fan motor

4. Removing the compressor

(1) Remove the cabinet. (Refer to 1.)

(2) Remove the relay panel.

(3) Remove the soundproof felt.

(4) Remove the terminal cover on the compressor.

(5) Disconnect lead wires from the compressor.

(6) Recover gas from the refrigerant circuit.

NOTE:

Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa).

(7) Disconnect the welded part of the discharge pipe.

(8) Disconnect the welded part of the suction pipe.

(9) Remove nuts fixing the compressor.

(10) Remove the compressor.

Photo 6

Discharge pipe

Suction pipe

Compressor

Terminal cover

Compressor nuts

26

OB405E.qxp 09.10.14 9:16 AM Page 27

10 PARTS LIST (non-RoHS compliant)

MU-A18ND

10-1. OUTDOOR UNIT

STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS

20 19

1

2

18

17

16

15

14

13

12

3

11

10

4

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

5

No.

1

8

9

10

11

12

13

5

6

7

2

3

4

14

15

16

17

18

19

20

21

22

23

Part No.

Part Name

E02 817 233

E02 A27 233

E02 817 232

E02 817 521

E02 141 501

E02 496 515

E02 075 506

E02 949 900

E02 817 290

E02 A27 290

E02 140 661

E02 139 662

E02 819 650

E02 817 245

E02 818 301

E02 561 630

E02 A27 630

E02 890 383

E02 795 374

E02 798 374

E02 895 351

E02 816 353

E02 817 009

E02 627 936

E02 A49 382

E07 001 241

BACK PANEL

BACK PANEL

CABINET

GRILLE

PROPELLER

MOTOR SUPPORT

COMPRESSOR RUBBER SET

COMPRESSOR

BASE

BASE

STOP VALVE(GAS)

STOP VALVE(LIQUID)

VALVE COVER

SERVICE PANEL

OUTDOOR FAN MOTOR

OUTDOOR HEAT EXCHANGER

OUTDOOR HEAT EXCHANGER

SURGE ABSORBER

TERMINAL BLOCK

TERMINAL BLOCK

OUTDOOR FAN CAPACITOR

COMPRESSOR CAPACITOR

HANDLE

CAPILLARY TUBE

FUSE

FUSE HOLDER

6 7 8

Symbol in Wiring

Diagram

Q'ty/unit

MU-A18ND - S1 MU-A18ND - S2

1

MC

1

1

1

1

3

1

1

1

1

1

3

1

1

1

MF

1

1

1

1

1

1

1

1

1

1

1

DSAR

TB2

TB1

C2

C1

F

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

27

9

Remarks

3RUBBERS/SET

RH247NRAT

{ 12.7

{ 6.35

RA6V60 -

3P

3P

3.0+/440V AC

35+/440V AC

{ 3.0

o{1.8o400

3.15A

OB405E.qxp 09.10.14 9:16 AM Page 28

1

4

5

7

2

3

PARTS LIST (non-RoHS compliant)

MU-A24ND MU-A30ND

10-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS

AND FUNCTIONAL PARTS

27 26 25 24 23

B

A

17

8

9

6

10 11 12 13

15

14

20

19

18

17

16

22

21

28

OB405E.qxp 09.10.14 9:16 AM Page 29

PARTS LIST (non-RoHS compliant)

MU-A24ND MU-A30ND

10-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS

AND FUNCTIONAL PARTS

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

No.

Part No.

Part Name

Symbol in Wiring

Diagram

MU-

A24ND - S1

1 1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

E02 819 297

E02 890 630

E02 947 630

E02 950 301

E02 951 301

E02 214 501

E07 070 508

E02 889 290

E02 890 290

E02 819 232

E02 819 009

E02 819 521

E02 527 506

E02 784 900

E02 951 900

E02 889 661

E02 947 662

E02 890 662

E02 889 932

E02 819 650

E02 819 245

E02 819 309

E02 890 383

E02 795 374

E02 889 374

E02 817 374

E02 890 351

E02 951 451

E02 A19 340

E02 951 340

E02 889 353

E02 816 353

E02 819 233

E02 817 009

E02 726 515

E02 890 640

E02 819 493

E02 A49 382

E02 336 385

E02 948 936

E02 948 937

E02 262 936

E02 527 936

E02 625 936

E02 947 490

E02 947 492

E07 001 241

TOP PANEL

OUTDOOR HEAT EXCHANGER

OUTDOOR HEAT EXCHANGER

OUTDOOR FAN MOTOR

OUTDOOR FAN MOTOR

PROPELLER

PROPELLER NUT

BASE

BASE

CABINET

HANDLE

FAN GUARD

COMPRESSOR RUBBER SET

COMPRESSOR

COMPRESSOR

STOP VALVE(GAS)

STOP VALVE(LIQUID)

STOP VALVE(LIQUID)

ACCUMULATOR

VALVE COVER

SERVICE PANEL

THERMISTOR

SURGE ABSORBER

TERMINAL BLOCK

TERMINAL BLOCK

TERMINAL BLOCK

OUTDOOR FAN CAPACITOR

DEICER P.C. BOARD

COMPRESSOR CONTACTOR

COMPRESSOR CONTACTOR

COMPRESSOR CAPACITOR

COMPRESSOR CAPACITOR

BACK PANEL(OUT)

HANDLE

MOTOR SUPPORT

EXPANSION VALVE

EXPANSION VALVE COIL

FUSE

VARISTOR

CAPILLARY TUBE(TAPER PIPE)

CAPILLARY TUBE(TAPER PIPE)

CAPILLARY TUBE

CAPILLARY TUBE

CAPILLARY TUBE

SOLENOID VALVE COIL

SOLENOID VALE

FUSE HOLDER

MF

MF

MC

MC

RT62, RT63

DSAR

TB2

TB2

TB1

C2

52C

52C

C1

C1

LEV

F,F61

NR61

21S2

1

1

1

1

1

1

1

1

4

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Q'ty/unit

MU-

A24ND - S2

1

MU-

A30ND - S1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

1

1

1

1

1

4

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1 1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remarks

RA6N75-

RA6N75-

4RUBBERS/SET

PH33NPBT

NH44NAVT

{ 15.88

{ 6.35

{ 9.52

DISCHARGE, AMBIENT

3P

3P

3P

4.0+/440V AC

FIGURE B

FIGURE A

55+/440V AC

35+/440V AC

3.15A

{ 4.2x{3.0x50

{ 3.6x{2.4x50

{ 4.0x{2.4x200

{ 4.0x{2.4x100

{ 3.0x{2.0x550

29

OB405E.qxp 09.10.14 9:16 AM Page 30

11 RoHS PARTS LIST (RoHS compliant)

MU-A18ND

11-1. OUTDOOR UNIT

STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS

1

2

3

20

4 5 6

19

18

17

16

15

14

13

12

7 8 9

11

10

30

OB405E.qxp 09.10.14 9:16 AM Page 31

RoHS PARTS LIST (RoHS compliant)

MU-A18ND

11-1. OUTDOOR UNIT

STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS

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

No.

Part No.

Part Name

4

5

2

3

6

7

1

8

9

10

11

12

13

14

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

15

16

17

18

19

20

21

22

23

E12 817 233

E12 A27 233

E12 817 232

E12 817 521

E12 141 501

E12 496 515

E12 075 506

E12 949 900

E12 817 290

E12 A27 290

E12 140 661

E12 139 662

E12 819 650

E12 817 245

E12 818 301

E12 561 630

E12 A27 630

E12 890 383

E12 795 374

E12 798 374

E12 895 351

E12 816 353

E12 817 009

E12 627 936

E12 A49 382

E17 001 241

BACK PANEL

BACK PANEL

CABINET

GRILLE

PROPELLER

MOTOR SUPPORT

COMPRESSOR RUBBER SET

COMPRESSOR

BASE

BASE

STOP VALVE(GAS)

STOP VALVE(LIQUID)

VALVE COVER

SERVICE PANEL

OUTDOOR FAN MOTOR

OUTDOOR HEAT EXCHANGER

OUTDOOR HEAT EXCHANGER

SURGE ABSORBER

TERMINAL BLOCK

TERMINAL BLOCK

OUTDOOR FAN CAPACITOR

COMPRESSOR CAPACITOR

HANDLE

CAPILLARY TUBE

FUSE

FUSE HOLDER

Symbol in Wiring

Diagram

Q'ty/unit

MU-A18ND - S1 MU-A18ND - S2

1

MC

1

1

1

1

3

1

1

1

3

1

1

1

1

1

MF

1

1

1

1

1

1

1

1

1

1

1

DSAR

TB2

TB1

C2

C1

F

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remarks

3RUBBERS/SET

RH247NRAT

{ 12.7

{ 6.35

RA6V60 -

3P

3P

3.0+/440V AC

35+/440V AC

{ 3.0

o{1.8o400

3.15A

31

OB405E.qxp 09.10.14 9:16 AM Page 32

1

4

5

7

2

3

RoHS PARTS LIST (RoHS compliant)

MU-A24ND MU-A30ND

11-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS

AND FUNCTIONAL PARTS

27 26 25 24 23

B

A

17

8

9

6

10 11 12 13

15

14

20

19

18

17

16

22

21

32

OB405E.qxp 09.10.14 9:16 AM Page 33

RoHS PARTS LIST (RoHS compliant)

MU-A24ND MU-A30ND

11-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS

AND FUNCTIONAL PARTS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

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

No.

Part No.

E12 819 297

E12 890 630

E12 947 630

E12 950 301

E12 951 301

E12 214 501

E17 070 508

E12 889 290

E12 890 290

E12 819 232

E12 819 009

E12 819 521

E12 527 506

E12 784 900

E12 951 900

E12 889 661

E12 947 662

E12 890 662

E12 889 932

E12 819 650

E12 819 245

E12 819 309

E12 890 383

E12 795 374

E12 889 374

E12 817 374

E12 890 351

E12 951 451

E12 B19 451

E12 A19 340

E12 951 340

E12 889 353

E12 816 353

E12 819 233

E12 817 009

E12 726 515

E12 890 640

E12 819 493

E12 A49 382

E12 336 385

E12 948 936

E12 B18 936

E12 948 937

E12 262 936

E12 527 936

E12 625 936

E12 947 490

E12 B19 490

E12 947 492

E12 B18 492

E17 001 241

Part Name

TOP PANEL

OUTDOOR HEAT EXCHANGER

OUTDOOR HEAT EXCHANGER

OUTDOOR FAN MOTOR

OUTDOOR FAN MOTOR

PROPELLER

PROPELLER NUT

BASE

BASE

CABINET

HANDLE

FAN GUARD

COMPRESSOR RUBBER SET

COMPRESSOR

COMPRESSOR

STOP VALVE (GAS)

STOP VALVE (LIQUID)

STOP VALVE (LIQUID)

ACCUMULATOR

VALVE COVER

SERVICE PANEL

THERMISTOR

SURGE ABSORBER

TERMINAL BLOCK

TERMINAL BLOCK

TERMINAL BLOCK

OUTDOOR FAN CAPACITOR

DEICER P.C. BOARD

DEICER P.C. BOARD

COMPRESSOR CONTACTOR

COMPRESSOR CONTACTOR

COMPRESSOR CAPACITOR

COMPRESSOR CAPACITOR

BACK PANEL (OUT)

HANDLE

MOTOR SUPPORT

EXPANSION VALVE

EXPANSION VALVE COIL

FUSE

VARISTOR

CAPILLARY TUBE (TAPER PIPE)

CAPILLARY TUBE (TAPER PIPE)

CAPILLARY TUBE (TAPER PIPE)

CAPILLARY TUBE

CAPILLARY TUBE

CAPILLARY TUBE

SOLENOID VALVE COIL

SOLENOID VALVE COIL

SOLENOID VALE

SOLENOID VALE

FUSE HOLDER

Symbol in Wiring

Diagram

MF

MF

MC

MC

RT62, RT63

DSAR

TB2

TB2

TB1

C2

52C

52C

C1

C1

LEV

F,F61

NR61

21S2

21S2

Q'ty/unit

MU-

A24ND -

S1

1

MU-

A24ND -

S2

1

MU-

A30ND -

S1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

1

1

1

1

4

1

1

1

1

1

4

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1 1

1

1

1

MU-

A30ND -

S2

1

1

1

1

1

1

1

1

1

4

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1 1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1 1

1

1

1

1

1 1

Remarks

RA6N75-

RA6N75-

4RUBBERS/SET

PH33NPBT

NH44NAVT

{ 15.88

{ 6.35

{ 9.52

DISCHARGE, AMBIENT

3P

3P

3P

4.0+/440V AC

FIGURE B

FIGURE A

55+/440V AC

35+/440V AC

3.15A

{ 4.2x{3.0x50

{ 4.2x{3.0x50

{ 3.6x{2.4x50

{ 4.0x{2.4x200

{ 4.0x{2.4x100

{ 3.0x{2.0x550

33

OB405E.qxp 09.10.14 9:16 AM Page 34

34

OB405E.qxp 09.10.14 9:16 AM Page 35

35

OB405E.qxp 09.10.14 9:16 AM Page 36

TM

HEAD OFFICE: TOKYO BLDG, 2-7-3, MARUNOUCHI, CHIYODAKU, TOKYO 100-8310, JAPAN

Distributed in Oct. 2009. No.OB405 REVISED EDITION-E 5

Distributed in May 2006. No.OB405 REVISED EDITION-D 106

Distributed in Nov. 2005. No.OB405 REVISED EDITION-C 106

Distributed in Jun. 2005. No.OB405 REVISED EDITION-B 106

Distributed in May 2005. No.OB405 REVISED EDITION-A 106

Reprinted in Apr. 2005. No.OB405 100

Distributed in Mar. 2005. No.OB405 6

Made in Japan

New publication, effective Oct. 2009

Specifications subject to change without notice.

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