Mitsubishi MS-A18WV Service manual

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Mitsubishi MS-A18WV Service manual | Manualzz

OB326A-1.qxp 04.2.9 10:41 AM Page 1

SPLIT-TYPE, AIR CONDITIONERS

Revision A:

● Resistance of LEV (Expansion valve) has been modified.

● Power input and others have been added to

SPECIFICATION.

Please void OB326.

No. OB326

REVISED EDITION-A

SERVICE MANUAL

Wireless type

Models

MU-A18WV -

MU-A24WV -

MU-A30WV -

E1

E1

E1

HFC utilized

R410A

Indication of model name

MU-A18WV -

E1

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················5

3. SPECIFICATION·················································5

4. NOISE CRITERIA CURVES ·······························7

5. OUTLINES AND DIMENSIONS ·························8

6. WIRING DIAGRAM ············································9

7. REFRIGERANT SYSTEM DIAGRAM ··············11

8. PERFORMANCE CURVES ······························14

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

10. TROUBLESHOOTING······································25

11. DISASSEMBLY INSTRUCTIONS ·····················32

12. PARTS LIST······················································38

NOTE:

•This service manual describes technical data of outdoor units.

As for indoor units MS-A18WV-

OB325.

E1 , MS-A24WVE1 and MS-A30WVE1 , refer to the service manual

OB326A-1.qxp 04.2.9 10:41 AM Page 2

Revision A:

•Resistance of LEV (Expansion valve) has been modified. (30.3 " ~ 37.0 " ➔ 41.0 " ~ 49.0 " )

TROUBLESHOOTING has been partially modified.

•Running current, power input and power factor have been added.

SPECIFICATION has been partially modified.

1

TECHNICAL CHANGES

MU-18RV -

E1

➔ MU-A18WV -

E1

1. Refrigerant has changed. (R22 ➔ R410A)

2. Refrigerant system diagram has changed.

• Diameter of stop valve has changed. (Gas: [ 15.88

➔[ 12.7)

• Accumulator has removed.

3. Oil separator has been added.

4. Compressor has changed. (PH33VPET ➔ RN196VHSHT)

MU-24RV -

E1

➔ MU-A24WV -

E1

1. Refrigerant has changed. (R22 ➔ R410A)

2. Refrigerant system diagram has changed.

• Diameter of stop valve has changed.

(Liquid: [ 9.52

➔[ 6.35)

3. Compressor has changed. (NH47VMDT ➔ NN29VBAHT)

MU-30RV -

E1

➔ MU-A30WV -

E1

1. Outdoor model has changed.

2. Refrigerant has changed. (R22 ➔ R410A)

3. Refrigerant system diagram has changed.

• Accumulator has removed.

4. Compressor has changed. (NH56VNHT ➔ NN37VAAHT)

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

• This room air conditioner adopts an HFC refrigerant (R410A) which never destroys the ozone layer.

• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners.

1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/ materials are required. Refer to the table below.

2 Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and installation, since it is more susceptible to contaminations than R22.

3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant piping.)

4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change.

Refrigerant

Composition (Ratio)

Refrigerant handling

Chlorine

Safety group (ASHRAE)

New refrigerant

R410A

HFC-32: HFC-125 (50%:50%)

Pseudo-azeotropic refrigerant

Not included

A1/A1

Molecular weight

Boiling point (

Kind

Color

: )

Steam pressure [25 : ](Mpa)

Saturated steam density [25

Combustibility

ODP w 1

GWP w 2

Refrigerant charge method

:

Additional charge on leakage

](Kg/ K )

Smell w

1 :Ozone Destruction Parameter : based on CFC-11 w

2 :Global Warmth Parameter : based on CO

2

72.6

-51.4

1.557

64

Non combustible

0

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non

Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

A1

86.5

-40.8

0.94

44.4

Non combustible

0.055

1700

Gas phase

Possible

Compatible oil

Light yellow

Non

2

OB326A-1.qxp 04.2.9 10:41 AM Page 3

New Specification Current Specification

The incompatible refrigerating oil easily separates from refrigerant and is in the upper layer inside the suction muffler.

Raising position of the oil back hole enables to back the refrigerating oil of the upper layer to flow back to the compressor.

Suction muffler

Since refrigerant and refrigerating oil are compatible each, refrigerating oil backs to the compressor through the lower position oil back hole.

Suction muffler

Compressor

Oil back hole

Refrigerating oil

Compressor

Oil back hole

Refrigerant Refrigerating oil /Refrigerant

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ f [Gauge])

Conversion chart of refrigerant temperature and pressure

(MPa [Gauge])

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

R410A

R22

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ f [Gauge])

-0.5

-30 -20 -10 0 10 20 30 40 50 60

( : )

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.

The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

R410A tools Can R22 tools be used?

Gauge manifold

Charge hose

Gas leak detector

Torque wrench

Flare tool

Flare gauge

Vacuum pump adapter

Electronic scale for refrigerant charging

No

No

No

Yes

No

Yes

New

New

New

Description

R410A has high pressures beyond the measurement range of existing gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit.

Hose material and cap size have been changed to improve the pressure resistance.

Dedicated for HFC refrigerant.

6.35 mm and 9.52 mm

12.7 mm and 15.88 mm

Clamp bar hole has been enlarged to reinforce the spring strength in the tool.

Provided for flaring work (to be used with R22 flare tool).

Provided to prevent the back flow of oil. This adapter enables you to use vacuum pumps.

It is difficult to measure R410A with a charging cylinder because the refrigerant bubbles due to high pressure and high-speed vaporization

No : Not Substitutable for R410A Yes : Substitutable for R410A

3

OB326A-1.qxp 04.2.9 10:41 AM Page 4

2.Refrigerant piping

1 Specifications

Use the refrigerant pipes that meet the following specifications.

Pipe

For liquid

For gas

Outside diameter mm

6.35

9.52

12.7

15.88

Wall thickness

0.8 mm

0.8 mm

0.8 mm

1.0 mm

Insulation material

Heat resisting foam plastic

Specific gravity 0.045 Thickness 8 mm

• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88).

Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88), as the pressure resistance is insufficient.

2 Flaring work and flare nut

Flaring work for R410A pipe differs from that for R22 pipe.

For details of flaring work, refer to Installation manual “FLARING WORK”.

Pipe diameter mm

6.35

9.52

12.7

15.88

R410A

17

22

26

29

Dimension of flare nut

R22

17

22

24

27

3.Refrigerant oil

Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.

4.Air purge

• Do not discharge the refrigerant into the atmosphere.

Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant circuit.

• Use the vacuum pump for air purging for the purpose of environmental protection.

5.Additional charge

For additional charging, charge the refrigerant from liquid phase of the gas cylinder.

If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, ability of the refrigerating cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

Union

Stop valve

Indoor unit

Liquid pipe

Gas pipe

Outdoor unit

Refrigerant gas cylinder operating valve

Service port

Gauge manifold valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging

4

OB326A-1.qxp 04.2.9 10:41 AM Page 5

2

PART NAMES AND FUNCTIONS

OUTDOOR UNIT

MU-A18WV -

E1

MU-A24WV -

E1

MU-A30WV -

E1

Air inlet

(back and side)

Piping

Drainage hose

Air outlet

Drain outlet

3

SPECIFICATION

Outdoor model

Function

Power supply

Capacity

Dehumidification

Air flow(High)

Power outlet kW r

K

/h

/h

Running current

Power input

Power factor

Starting current

Compressor motor current

Fan motor current

Coefficient of performance(C.O.P)

Model

A

%

A

A

A

A

W

W Output

Winding resistance(at 20 : )

Model

Winding resistance(at 20 : )

Dimensions W

O

H

O

D

Weight

Sound level(High)

"

" mm kg dB rpm Fan speed(High)

Fan speed regulator

Refrigerant filling capacity(R410A)

Refrigerating oil (Model) kg cc

NOTE: Test conditions are based on JIS C 9612.

Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB(24°C)

Indoor-Outdoor piping length : 5m

MU-A18WV -

E1

Cooling

Single phase

230V, 50Hz

5.0

2.5

2,196

15

7.90

1,750

96

37

7.51

0.39

2.76

RN196VHSHT

1,300

C-R 1.80

C-S 3.00

RA6V50-OG

WHT-BLK 116

BLK-RED 111

850 o

605 o

290

44

52

828

1

1.40

520 (NEO22)

5

Air inlet

(back and side)

Air outlet

MU-A24WV -

E1

Cooling

Single phase

230V, 50Hz

6.5

3.4

2,322

25

10.82

2,420

97

74

10.27

0.55

2.62

NN29VBAHT

1,900

C-R 0.80

C-S 1.64

RA6V60-MA

WHT-BLK 71

BLK-RED 89

850 o

605 o

290

60

53

873

1

1.90

1,200 (NEO22)

OB326A-1.qxp 04.2.9 10:41 AM Page 6

Outdoor model

Function

Power supply

Capacity

Dehumidification

Power outlet

Running current

Power input

Winding resistance(at 20 : )

Model

Winding

K /h

A

A

W

Power factor

Starting current

Compressor motor current

Fan motor current

%

A

A

A

Coefficient of performance(C.O.P)

Model

Output W

"

" resistance(at 20 : )

Dimensions W

O

H

O

D

Weight mm kg dB rpm

Fan speed regulator

Refrigerant filling capacity(R410A)

Refrigerating oil (Model)

Thermistor RT62(at 25 : )

Thermistor RT63(at 0 : ) kW

R /h kg cc k k

"

"

NOTE: Test conditions are based on JIS C 9612.

Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB(24°C)

Indoor-Outdoor piping length : 5m w Reference value

MU-A30WV -

E1

Cooling

Single phase

230V, 50Hz

8.5

4.6

2,940/1,470 w

25

14.42

3,191

96

90

13.85

0.57

2.61

NN37VAAHT

2,500

C-R 0.64

C-S 1.63

RA6V75-AB

WHT-BLK 62.8 BLK-YLW 55.9

YLW-RED 26.0

840 o

850 o

330

75

55/53 w

805/435 w

2

2.30

1,300 (NEO 22)

231.44

33.18

6

OB326A-1.qxp 04.2.9 10:41 AM Page 7

4

NOISE CRITERIA CURVES

MU-A18WV-

E1

MU-A24WV-

E1

FAN SPEED SPL(dB(A))

High 52

LINE FAN SPEED SPL(dB(A))

High 53

LINE

Test conditions,

Cooling : Dry-bulb temperature 35 : Wet-bulb temperature 24 :

90

Test conditions,

Cooling : Dry-bulb temperature 35 : Wet-bulb temperature 24 :

90

80

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

55

NC-30

20

10

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125

NC-20

250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

MU-A30WV-

E1

FAN SPEED SPL(dB(A)) LINE

High

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125

NC-20

250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

Test conditions,

Cooling : Dry-bulb temperature 35 : Wet-bulb temperature 24 :

90

OUTDOOR UNIT

1m

MICROPHONE

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125

NC-20

250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

7

OB326A-1.qxp 04.2.9 10:41 AM Page 8

5

OUTLINES AND DIMENSIONS

MU-A18WV-

E1

OUTDOOR UNIT

MU-A24WV-

E1

Drainage hole [ 16.2

355

350

Air in

20

100mm or more

100mm or more

Unit: mm

Air in

Drainage

3holes [ 33

Air out

MU-A30WV-

E1

OUTDOOR UNIT

299

515

66

500

850

183

40

50

74

30

500mm or more

Service panel

30

Liquid refrigerant pipe joint

Refregerant pipe

(flared) [ 6.35

-

35

161

Gas refregerant pipe joint

Refregerant pipe

(flared) [ 12.7 (MU-A18WV)

[ 15.88 (MU-A24WV)

350mm or more

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

121

840 80

Open as a rule

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

350mm or more

Service panel

Liquid refrigerant pipe joint

Refrigerant pipe

(flared) [ 9.52

198

35

30

Gas refrigerant pipe joint

Refrigerant pipe

(flared) [ 15.88

8

OB326A-1.qxp 04.2.9 10:41 AM Page 9

6

WIRING DIAGRAM

MU-A18WV -

E1

OUTDOOR UNIT

MODEL WIRING DIAGRAM

TB2

2

WHT

TO

INDOOR UNIT

CONNECTING

12V

1

CIRCUIT BREAKER

TB1

L

POWER SUPPLY

~/N

230V 50Hz

PE

N

BLK

GRN/YLW

52C

52C

BRN

BLU

NO COM

BRN

WHT

WHT

DSAR

C1

RED

BLK

S

C

MC

R

C2

RED

ORN

WHT

BLU

1

2

3

4

RED

ORN

WHT

BLK

MF

SYMBOL

C1

NAME

COMPRESSOR CAPACITOR

C2

DSAR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

SYMBOL

MC

NAME

COMPRESOR (INNER PROTECTOR)

SYMBOL

52C

NAME

COMPRESSOR CONTACTOR

MF OUTDOOR FAN MOTOR (INNER PROTECTOR)

TB1,TB2 TERMINAL BLOCK

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

MU-A24WV -

E1

OUTDOOR UNIT

TO

INDOOR UNIT

CONNECTING

12V

MODEL WIRING DIAGRAM

TB2

2

WHT

1

BLK

X1

DSAR

BRN

X1

CIRCUIT BREAKER

L

52C

BRN

BRN

NO

52C

COM

WHT

C

C1

RED

S

BLK

MC

R

POWER SUPPLY

~/N

230V 50Hz

PE

N

BLU

GRN/YLW

NO COM

C2

RED

ORN

WHT

BLU

3

4

1

2

RED

ORN

WHT

BLK

MF

TB1

SYMBOL

C1

NAME

COMPRESSOR CAPACITOR

C2

DSAR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

SYMBOL

MC

NAME

COMPRESSOR (INNER PROTECTOR)

SYMBOL

X1

MF OUTDOOR FAN MOTOR (INNER PROTECTOR) 52C

RELAY

NAME

COMPRESSOR CONTACTOR

TB1,TB2 TERMINAL BLOCK

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

9

OB326A-1.qxp 04.2.9 10:41 AM Page 10

MU-A30WV -

E1

OUTDOOR UNIT

MODEL WIRING DIAGRAM

CIRCUIT BREAKER

L

TB1

N

PE

3

N

TB2

RT62 RT63

LEV

CN662

X52

MF

6

CN724

SR62

SR61

6 5 4 3 2 1

RED

ORN

C2

1 2 3 CN711

BRN

BLU

DEICER

P. C. BOARD

T61

NR61

X52

TAB52

COM NO

CN730

F61

7

5

3

1

BRN

1

WHT

2

52C

CZ

WHT

BLU

BLU

WHT

A1

52C

A2

C

C1

RED

BLK

S MC

R

BLU

RED

BLU

SYMBOL

CZ

C1

NAME

CZ SURGE ABSRBER

COMPRESSOR CAPACITOR

C2

DSAR

F61

LEV

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

FUSE(3.15A)

EXPANSION VALVE COIL

SYMBOL

MC

MF

NR61

RT62

RT63

SR61

NAME

COMPRESSOR (INNER PROTECTOR)

OUTDOOR FAN MOTOR (INNER PROTECTOR)

VARISTOR

DISCHARGE TEMPERATURE THERMISTOR

AMBIENT TEMPERATURE THERMISTOR

SOLID STATE RELAY

SYMBOL

SR62

TB1

TB2

T61

X52

52C

NAME

SOLID STATE RELAY

TERMINAL BLOCK

TERMINAL BLOCK

TRANSFORMER

CONTACTOR

COMPRESSOR CONTACTOR

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,N).

3. Symbols below indicate.

/ : Terminal block, : Connector

10

OB326A-1.qxp 04.2.9 10:41 AM Page 11

7

REFRIGERANT SYSTEM DIAGRAM

MU-A18WV -

E1

OUTDOOR UNIT

Refrigerant pipe [ 12.7

(with heat insulator)

Flared connection

Stop valve

(with service port)

Oil separator

Capillary tube

[ 2.5

o[ 0.6

o 1,000

Strainer

#100

Outdoor heat exchanger

Unit:mm

Compressor

Flared connection

Stop valve

Refrigerant pipe [ 6.35

(with heat insulator)

MU-A24WV -

E1

OUTDOOR UNIT

Refrigerant pipe [ 15.88

(with heat insulator)

Muffler

Stop valve

(with service port)

Flared connection

Capillary tube

[ 3.0

o[ 1.6

o 600

Refrigerant flow in cooling

Muffler

#100

Outdoor heat exchanger

Compressor

Flared connection

Refrigerant pipe [ 6.35

Stop valve Capillary tube

[ 3.0X

[ 2.0X900

(with heat insulator)

11

Refrigerant flow in cooling

OB326A-1.qxp 04.2.9 10:41 AM Page 12

MU-A30WV -

E1

OUTDOOR UNIT

Refrigerant pipe [ 15.88

(with heat insulator)

Flared connection

Stop valve

(with service port)

Discharge temperature thermistor

RT62

Muffler

Outdoor heat exchanger

Unit:mm

Muffler

Flared connection

Refrigerant pipe [ 9.52

(with heat insulator)

Stop valve Capillary tube

[ 3.6

✕[ 2.4

✕ 50

Compressor

Capillary tube

[ 4.0

✕[ 2.4

✕ 200

(Upper path)

LEV

Strainer

Ambient temperature thermistor

RT63

Capillary tube

[ 4.0

✕[ 2.4

(Lower path)

100

Refrigerant flow in cooling

MAX. REFRIGERANT PIPING LENGTH

Model

Refrigerant piping

Max. length : m

A

MU-A18WV -

E1

25

MU-A24WV -

E1

MU-A30WV -

E1

30

Piping size O.D : mm

Liquid Gas

12.7

6.35

15.88

9.52

Length of connecting pipe : m

Indoor unit Outdoor unit

Gas 0.43

Liquid 0.5

Gas 0

Liquid 0

MAX. HEIGHT DIFFERENCE

Indoor unit w

Max. Height difference:

10m(MS-A18/A24WV)/

15m(MS-A30WV)

Refrigerant Piping

Max. Length

A

Outdoor unit w

Height difference should be within 10m(MS-A18/A24WV)/

15m(MS-A30WV) regardless of which unit, indoor or outdoor position is high.

12

OB326A-1.qxp 04.2.9 10:41 AM Page 13

ADDITIONAL REFRIGERANT CHARGE(R410A : g)

Model

MU-A18WV -

E1

Outdoor unit precharged

1,400

7m

0

Refrigerant piping length (one way)

10m 15m 20m 25m

60 160 260 360

Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)

Model

MU-A24WV -

E1

Outdoor unit precharged

1,900

7m

0

Refrigerant piping length (one way)

10m 15m 20m 25m

60 160 260 360

Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)

Model

MU-A30WV -

E1

Outdoor unit precharged

2,300

7m

0

10m

165

Refrigerant piping length (one way)

15m 20m 25m 30m

440 715 990 1,165

Calculation : Xg=55g/m o

(Refrigerant piping length(m)-7)

13

OB326A-1.qxp 04.2.9 10:41 AM Page 14

8

PERFORMANCE CURVES

MU-A18WV -

E1

MU-A24WV -

E1

MU-A30WV -

E1

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 ~ 264V, 50Hz

(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

}

Cooling

Indoor air wet/dry-bulb temperature difference on the left side of the chart on this 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 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

Wet-and dry-bulb thermometers

12.8

11.6

10.5

9.5

8.5

7.5

18.0

19.2

16.3

17.4

14.6

15.6

13.1

13.9

11.6

12.4

10.2

10.8

Wet-and dry-bulb thermometers

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

30

14

Relative humidity(%)

50

60

70

OB326A-1.qxp 04.2.9 10:41 AM Page 15

2 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).

The conversion factor is : 1(MPa [Gauge]) =10.2(kgf/ f [Gauge])

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

12

1.2

MU-A18WV -

E1

230V

1.1

11

10

1.0

9

0.9

8

0.8

7

0.7

15 18 20

50

25

60

30 32

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

35 ( : )

7

8

9

MU-A18WV -

E1

230V

6

5

15 18 20

50

25

60

30 32

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

35( : )

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

11

1.1

MU-A24WV -

E1

230V

10

1.0

9

0.9

8

0.8

7

0.7

6

0.6

15 18 20

50

25

60

30 32

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

35 ( : )

12

11

10

9

8

MU-A24WV -

E1

230V

7

15 18 20

50

25

60

30 32

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

35( : )

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

11

1.1

MU-A30WV -

E1

230V

1.0

10

9

0.9

8

0.8

7

0.7

6

0.6

15 18 20

50

25

60

30 32

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

35 ( : )

MU-A30WV -

E1

16

15

14

13

12

11

230V

10

15 18 20

50

25

60

30 32

70(%)

Ambient temperature(˚C)

Ambient humidity(%)

35 ( : )

15

OB326A-1.qxp 04.2.9 10:41 AM Page 16

PERFORMANCE DATA COOL operation

MS-A18WV -

E1

: MU-A18WV -

E1

(230V)

CAPACITY : 5.0(KW) SHF : 0.65 INPUT : 1810(W)

30

30

30

30

29

29

29

30

28

28

29

29

27

28

28

28

31

32

32

32

31

31

31

31

32

32

26

26

26

26

25

25

25

25

26

27

27

27

27

24

24

24

24

22

23

23

23

OUTDOOR DB( : )

INDOOR

DB( : )

21

21

22

22

INDOOR

WB( : )

21 25 27

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

30

Q SHC SHF INPUT

18 5.88 2.76 0.47

1448 5.63 2.64 0.47

1520 5.40 2.54 0.47

1593 5.20 2.44 0.47

1665

20 6.13 2.14 0.35

1520 5.88 2.06 0.35

1611 5.70 2.00 0.35

1647 5.50 1.93 0.35

1720

18 5.88 3.00 0.51

1448 5.63 2.87 0.51

1520 5.40 2.75 0.51

1593 5.20 2.65 0.51

1665

20 6.13 2.39 0.39

1520 5.88 2.29 0.39

1611 5.70 2.22 0.39

1647 5.50 2.15 0.39

1720

22

18

20

22

18

20

22

24

18

20

22

24

18

20

22

24

26

18

20

6.38 1.72 0.27

5.88 3.23 0.55

6.13 2.63 0.43

6.38 1.98 0.31

5.88 3.47 0.59

6.13 2.88 0.47

6.38 2.23 0.35

6.70 1.54 0.23

5.88 3.70 0.63

6.13 3.12 0.51

6.38 2.49 0.39

6.70 1.81 0.27

5.88 3.94 0.67

6.13 3.37 0.55

6.38 2.74 0.43

6.70 2.08 0.31

6.90 1.31 0.19

5.88 4.17 0.71

6.13 3.61 0.59

1575

1448

1520

1575

1448

1520

1575

1647

1448

1520

1575

1647

1448

1520

1575

1647

1738

1448

1520

6.15 1.66 0.27

5.63 3.09 0.55

5.88 2.53 0.43

6.15 1.91 0.31

5.63 3.32 0.59

5.88 2.76 0.47

6.15 2.15 0.35

6.45 1.48 0.23

5.63 3.54 0.63

5.88 3.00 0.51

6.15 2.40 0.39

6.45 1.74 0.27

5.63 3.77 0.67

5.88 3.23 0.55

6.15 2.64 0.43

6.45 2.00 0.31

6.70 1.27 0.19

5.63 3.99 0.71

5.88 3.47 0.59

1674

1520

1611

1674

1520

1611

1674

1738

1520

1611

1674

1738

1520

1611

1674

1738

1828

1520

1611

6.00 1.62 0.27

5.40 2.97 0.55

5.70 2.45 0.43

6.00 1.86 0.31

5.40 3.19 0.59

5.70 2.68 0.47

6.00 2.10 0.35

6.30 1.45 0.23

5.40 3.40 0.63

5.70 2.91 0.51

6.00 2.34 0.39

6.30 1.70 0.27

5.40 3.62 0.67

5.70 3.14 0.55

6.00 2.58 0.43

6.30 1.95 0.31

6.60 1.25 0.19

5.40 3.83 0.71

5.70 3.36 0.59

1720

1593

1647

1720

1593

1647

1720

1792

1593

1647

1720

1792

1593

1647

1720

1792

1882

1593

1647

5.75 1.55 0.27

5.20 2.86 0.55

5.50 2.37 0.43

5.75 1.78 0.31

5.20 3.07 0.59

5.50 2.59 0.47

5.75 2.01 0.35

6.10 1.40 0.23

5.20 3.28 0.63

5.50 2.81 0.51

5.75 2.24 0.39

6.10 1.65 0.27

5.20 3.48 0.67

5.50 3.03 0.55

5.75 2.47 0.43

6.10 1.89 0.31

6.40 1.22 0.19

5.20 3.69 0.71

5.50 3.25 0.59

1792

1665

1720

1792

1665

1720

1792

1882

1665

1720

1792

1882

1665

1720

1792

1882

1937

1665

1720

22 6.38 3.00 0.47

1575 6.15 2.89 0.47

1674 6.00 2.82 0.47

1720 5.75 2.70 0.47

1792

24 6.70 2.35 0.35

1647 6.45 2.26 0.35

1738 6.30 2.21 0.35

1792 6.10 2.14 0.35

1882

26 6.90 1.59 0.23

1738 6.70 1.54 0.23

1828 6.60 1.52 0.23

1882 6.40 1.47 0.23

1937

18 5.88 4.41 0.75

1448 5.63 4.22 0.75

1520 5.40 4.05 0.75

1593 5.20 3.90 0.75

1665

20 6.13 3.86 0.63

1520 5.88 3.70 0.63

1611 5.70 3.59 0.63

1647 5.50 3.47 0.63

1720

22 6.38 3.25 0.51

1575 6.15 3.14 0.51

1674 6.00 3.06 0.51

1720 5.75 2.93 0.51

1792

24 6.70 2.61 0.39

1647 6.45 2.52 0.39

1738 6.30 2.46 0.39

1792 6.10 2.38 0.39

1882

26 6.90 1.86 0.27

1738 6.70 1.81 0.27

1828 6.60 1.78 0.27

1882 6.40 1.73 0.27

1937

18 5.88 4.64 0.79

1448 5.63 4.44 0.79

1520 5.40 4.27 0.79

1593 5.20 4.11 0.79

1665

20 6.13 4.10 0.67

1520 5.88 3.94 0.67

1611 5.70 3.82 0.67

1647 5.50 3.69 0.67

1720

22 6.38 3.51 0.55

1575 6.15 3.38 0.55

1674 6.00 3.30 0.55

1720 5.75 3.16 0.55

1792

24 6.70 2.88 0.43

1647 6.45 2.77 0.43

1738 6.30 2.71 0.43

1792 6.10 2.62 0.43

1882

26 6.90 2.14 0.31

1738 6.70 2.08 0.31

1828 6.60 2.05 0.31

1882 6.40 1.98 0.31

1937

18 5.88 4.88 0.83

1448 5.63 4.67 0.83

1520 5.40 4.48 0.83

1593 5.20 4.32 0.83

1665

20 6.13 4.35 0.71

1520 5.88 4.17 0.71

1611 5.70 4.05 0.71

1647 5.50 3.91 0.71

1720

22 6.38 3.76 0.59

1575 6.15 3.63 0.59

1674 6.00 3.54 0.59

1720 5.75 3.39 0.59

1792

24 6.70 3.15 0.47

1647 6.45 3.03 0.47

1738 6.30 2.96 0.47

1792 6.10 2.87 0.47

1882

26 6.90 2.42 0.35

1738 6.70 2.35 0.35

1828 6.60 2.31 0.35

1882 6.40 2.24 0.35

1937

18

20

22

24

26

18

20

22

24

26

5.88 5.11 0.87

6.13 4.59 0.75

6.38 4.02 0.63

6.70 3.42 0.51

6.90 2.69 0.39

5.88 5.35 0.91

6.13 4.84 0.79

6.38 4.27 0.67

6.70 3.69 0.55

6.90 2.97 0.43

1448

1520

1575

1647

1738

1448

1520

1575

1647

1738

5.63 4.89 0.87

5.88 4.41 0.75

6.15 3.87 0.63

6.45 3.29 0.51

6.70 2.61 0.39

5.63 5.12 0.91

5.88 4.64 0.79

6.15 4.12 0.67

6.45 3.55 0.55

6.70 2.88 0.43

1520

1611

1674

1738

1828

1520

1611

1674

1738

1828

5.40 4.70 0.87

5.70 4.28 0.75

6.00 3.78 0.63

6.30 3.21 0.51

6.60 2.57 0.39

5.40 4.91 0.91

5.70 4.50 0.79

6.00 4.02 0.67

6.30 3.47 0.55

6.60 2.84 0.43

1593

1647

1720

1792

1882

1593

1647

1720

1792

1882

5.20 4.52 0.87

5.50 4.13 0.75

5.75 3.62 0.63

6.10 3.11 0.51

6.40 2.50 0.39

5.20 4.73 0.91

5.50 4.35 0.79

5.75 3.85 0.67

6.10 3.36 0.55

6.40 2.75 0.43

1665

1720

1792

1882

1937

1665

1720

1792

1882

1937

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

16

OB326A-1.qxp 04.2.9 10:41 AM Page 17

PERFORMANCE DATA COOL operation

MS-A18WV -

E1

: MU-A18WV -

E1

(230V)

28

28

28

29

27

27

28

28

26

27

27

27

26

26

26

26

25

25

25

25

24

24

24

24

22

23

23

23

21

21

22

22

31

31

32

32

30

31

31

31

30

30

30

30

29

29

29

29

32

32

32

22

24

26

18

24

26

18

20

26

18

20

22

18

20

22

24

18

20

22

24

18

20

22

24

22

18

20

22

18

20

18

20

24

26

18

20

26

18

20

22

18

20

22

24

20

22

24

26

22

24

26

CAPACITY : 5.0(KW) SHF : 0.65 INPUT : 1810(W)

OUTDOOR DB( : )

INDOOR INDOOR

DB( : ) WB( : ) Q

35

SHC SHF INPUT Q

40

SHC SHF INPUT Q

43

SHC SHF INPUT

4.90 2.30 0.47

1774 4.50 2.12 0.47

1882 4.33 2.03 0.47

1919

5.15 1.80 0.35

1846 4.80 1.68 0.35

1937 4.63 1.62 0.35

1991

4.90 2.50 0.51

1774 4.50 2.30 0.51

1882 4.33 2.21 0.51

1919

5.15 2.01 0.39

1846 4.80 1.87 0.39

1937 4.63 1.80 0.39

1991

5.45 1.47 0.27

1919 5.10 1.38 0.27

2027 4.93 1.33 0.27

2063

4.90 2.70 0.55

1774 4.50 2.48 0.55

1882 4.33 2.38 0.55

1919

5.15 2.21 0.43

1846 4.80 2.06 0.43

1937 4.63 1.99 0.43

1991

5.45 1.69 0.31

1919 5.10 1.58 0.31

2027 4.93 1.53 0.31

2063

4.90 2.89 0.59

1774 4.50 2.66 0.59

1882 4.33 2.55 0.59

1919

5.15 2.42 0.47

1846 4.80 2.26 0.47

1937 4.63 2.17 0.47

1991

5.45 1.91 0.35

1919 5.10 1.79 0.35

2027 4.93 1.72 0.35

2063

5.75 1.32 0.23

1991 5.40 1.24 0.23

2082 5.25 1.21 0.23

2127

4.90 3.09 0.63

1774 4.50 2.84 0.63

1882 4.33 2.72 0.63

1919

5.15 2.63 0.51

1846 4.80 2.45 0.51

1937 4.63 2.36 0.51

1991

5.45 2.13 0.39

1919 5.10 1.99 0.39

2027 4.93 1.92 0.39

2063

5.75 1.55 0.27

1991 5.40 1.46 0.27

2082 5.25 1.42 0.27

2127

4.90 3.28 0.67

1774 4.50 3.02 0.67

1882 4.33 2.90 0.67

1919

5.15 2.83 0.55

1846 4.80 2.64 0.55

1937 4.63 2.54 0.55

1991

5.45 2.34 0.43

1919 5.10 2.19 0.43

2027 4.93 2.12 0.43

2063

5.75 1.78 0.31

1991 5.40 1.67 0.31

2082 5.25 1.63 0.31

2127

6.05 1.15 0.19

2063 5.70 1.08 0.19

2154 5.53 1.05 0.19

2199

4.90 3.48 0.71

1774 4.50 3.20 0.71

1882 4.33 3.07 0.71

1919

5.15 3.04 0.59

1846 4.80 2.83 0.59

1937 4.63 2.73 0.59

1991

5.45 2.56 0.47

1919 5.10 2.40 0.47

2027 4.93 2.31 0.47

2063

5.75 2.01 0.35

1991 5.40 1.89 0.35

2082 5.25 1.84 0.35

2127

6.05 1.39 0.23

2063 5.70 1.31 0.23

2154 5.53 1.27 0.23

2199

4.90 3.68 0.75

1774 4.50 3.38 0.75

1882 4.33 3.24 0.75

1919

5.15 3.24 0.63

1846 4.80 3.02 0.63

1937 4.63 2.91 0.63

1991

5.45 2.78 0.51

1919 5.10 2.60 0.51

2027 4.93 2.51 0.51

2063

5.75 2.24 0.39

1991 5.40 2.11 0.39

2082 5.25 2.05 0.39

2127

6.05 1.63 0.27

2063 5.70 1.54 0.27

2154 5.53 1.49 0.27

2199

4.90 3.87 0.79

1774 4.50 3.56 0.79

1882 4.33 3.42 0.79

1919

5.15 3.45 0.67

1846 4.80 3.22 0.67

1937 4.63 3.10 0.67

1991

5.45 3.00 0.55

1919 5.10 2.81 0.55

2027 4.93 2.71 0.55

2063

5.75 2.47 0.43

1991 5.40 2.32 0.43

2082 5.25 2.26 0.43

2127

6.05 1.88 0.31

2063 5.70 1.77 0.31

2154 5.53 1.71 0.31

2199

4.90 4.07 0.83

1774 4.50 3.74 0.83

1882 4.33 3.59 0.83

1919

5.15 3.66 0.71

1846 4.80 3.41 0.71

1937 4.63 3.28 0.71

1991

5.45 3.22 0.59

1919 5.10 3.01 0.59

2027 4.93 2.91 0.59

2063

5.75 2.70 0.47

1991 5.40 2.54 0.47

2082 5.25 2.47 0.47

2127

6.05 2.12 0.35

2063 5.70 2.00 0.35

2154 5.53 1.93 0.35

2199

4.90 4.26 0.87

1774 4.50 3.92 0.87

1882 4.33 3.76 0.87

1919

5.15 3.86 0.75

1846 4.80 3.60 0.75

1937 4.63 3.47 0.75

1991

5.45 3.43 0.63

1919 5.10 3.21 0.63

2027 4.93 3.10 0.63

2063

5.75 2.93 0.51

1991 5.40 2.75 0.51

2082 5.25 2.68 0.51

2127

6.05 2.36 0.39

2063 5.70 2.22 0.39

2154 5.53 2.15 0.39

2199

4.90 4.46 0.91

1774 4.50 4.10 0.91

1882 4.33 3.94 0.91

1919

5.15 4.07 0.79

1846 4.80 3.79 0.79

1937 4.63 3.65 0.79

1991

5.45 3.65 0.67

1919 5.10 3.42 0.67

2027 4.93 3.30 0.67

2063

5.75 3.16 0.55

1991 5.40 2.97 0.55

2082 5.25 2.89 0.55

2127

6.05 2.60 0.43

2063 5.70 2.45 0.43

2154 5.53 2.38 0.43

2199

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

17

OB326A-1.qxp 04.2.9 10:41 AM Page 18

PERFORMANCE DATA COOL operation

MS-A24WV -

E1

: MU-A24WV -

E1

(230V)

30

31

31

31

30

30

30

30

29

29

29

29

28

28

28

29

31

31

32

32

32

32

32

27

27

28

28

26

27

27

27

26

26

26

26

25

25

25

25

INDOOR INDOOR

DB( : ) WB( : )

21

21

22

22

18

20

18

20

24

24

24

24

22

23

23

23

18

20

22

24

22

18

20

22

24

26

18

20

26

18

20

22

18

20

22

24

18

20

22

24

26

18

20

22

18

20

22

24

20

22

24

26

22

24

26

18

24

26

18

20

22

24

26

CAPACITY : 6.5(KW) SHF : 0.63 INPUT : 2480(W)

OUTDOOR DB( : )

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

7.64 3.44 0.45

1984 7.31 3.29 0.45

2083 7.02 3.16 0.45

2182 6.76 3.04 0.45

2282

7.96 2.63 0.33

7.64 3.74 0.49

7.96 2.95 0.37

8.29 2.07 0.25

7.64 4.05 0.53

7.96 3.26 0.41

8.29 2.40 0.29

7.64 4.35 0.57

2083

1984

2083

2158

1984

2083

2158

1984

7.64 2.52 0.33

7.31 3.58 0.49

7.64 2.83 0.37

8.00 2.00 0.25

7.31 3.88 0.53

7.64 3.13 0.41

8.00 2.32 0.29

7.31 4.17 0.57

2207

2083

2207

2294

2083

2207

2294

2083

7.41 2.45 0.33

7.02 3.44 0.49

7.41 2.74 0.37

7.80 1.95 0.25

7.02 3.72 0.53

7.41 3.04 0.41

7.80 2.26 0.29

7.02 4.00 0.57

2257

2182

2257

2356

2182

2257

2356

2182

7.15 2.36 0.33

6.76 3.31 0.49

7.15 2.65 0.37

7.48 1.87 0.25

6.76 3.58 0.53

7.15 2.93 0.41

7.48 2.17 0.29

6.76 3.85 0.57

2356

2282

2356

2455

2282

2356

2455

2282

7.96 3.58 0.45

8.29 2.73 0.33

8.71 1.83 0.21

7.64 4.66 0.61

7.96 3.90 0.49

8.29 3.07 0.37

8.71 2.18 0.25

7.64 4.96 0.65

7.96 4.22 0.53

8.29 3.40 0.41

8.71 2.53 0.29

8.97 1.52 0.17

7.64 5.27 0.69

7.96 4.54 0.57

8.29 3.73 0.45

8.71 2.87 0.33

2083

2158

2257

1984

2083

2158

2257

1984

2083

2158

2257

2381

1984

2083

2158

2257

7.64 3.44 0.45

8.00 2.64 0.33

8.39 1.76 0.21

7.31 4.46 0.61

7.64 3.74 0.49

8.00 2.96 0.37

8.39 2.10 0.25

7.31 4.75 0.65

7.64 4.05 0.53

8.00 3.28 0.41

8.39 2.43 0.29

8.71 1.48 0.17

7.31 5.05 0.69

7.64 4.35 0.57

8.00 3.60 0.45

8.39 2.77 0.33

2207

2294

2381

2083

2207

2294

2381

2083

2207

2294

2381

2505

2083

2207

2294

2381

7.41 3.33 0.45

7.80 2.57 0.33

8.19 1.72 0.21

7.02 4.28 0.61

7.41 3.63 0.49

7.80 2.89 0.37

8.19 2.05 0.25

7.02 4.56 0.65

7.41 3.93 0.53

7.80 3.20 0.41

8.19 2.38 0.29

8.58 1.46 0.17

7.02 4.84 0.69

7.41 4.22 0.57

7.80 3.51 0.45

8.19 2.70 0.33

2257

2356

2455

2182

2257

2356

2455

2182

2257

2356

2455

2579

2182

2257

2356

2455

7.15 3.22 0.45

7.48 2.47 0.33

7.93 1.67 0.21

6.76 4.12 0.61

7.15 3.50 0.49

7.48 2.77 0.37

7.93 1.98 0.25

6.76 4.39 0.65

7.15 3.79 0.53

7.48 3.06 0.41

7.93 2.30 0.29

8.32 1.41 0.17

6.76 4.66 0.69

7.15 4.08 0.57

7.48 3.36 0.45

7.93 2.62 0.33

2356

2455

2579

2654

2282

2356

2455

2579

2356

2455

2579

2282

2356

2455

2579

2282

8.97 1.88 0.21

2381 8.71 1.83 0.21

2505 8.58 1.80 0.21

2579 8.32 1.75 0.21

7.64 5.58 0.73

1984 7.31 5.34 0.73

2083 7.02 5.12 0.73

2182 6.76 4.93 0.73

7.96 4.86 0.61

2083 7.64 4.66 0.61

2207 7.41 4.52 0.61

2257 7.15 4.36 0.61

8.29 4.06 0.49

2158 8.00 3.92 0.49

2294 7.80 3.82 0.49

2356 7.48 3.66 0.49

8.71 3.22 0.37

2257 8.39 3.10 0.37

2381 8.19 3.03 0.37

2455 7.93 2.93 0.37

8.97 2.24 0.25

2381 8.71 2.18 0.25

2505 8.58 2.15 0.25

2579 8.32 2.08 0.25

7.64 5.88 0.77

1984 7.31 5.63 0.77

2083 7.02 5.41 0.77

2182 6.76 5.21 0.77

7.96 5.18 0.65

2083 7.64 4.96 0.65

2207 7.41 4.82 0.65

2257 7.15 4.65 0.65

8.29 4.39 0.53

2158 8.00 4.24 0.53

2294 7.80 4.13 0.53

2356 7.48 3.96 0.53

8.71 3.57 0.41

2257 8.39 3.44 0.41

2381 8.19 3.36 0.41

2455 7.93 3.25 0.41

8.97 2.60 0.29

2381 8.71 2.53 0.29

2505 8.58 2.49 0.29

2579 8.32 2.41 0.29

7.64 6.19 0.81

1984 7.31 5.92 0.81

2083 7.02 5.69 0.81

2182 6.76 5.48 0.81

7.96 5.49 0.69

2083 7.64 5.27 0.69

2207 7.41 5.11 0.69

2257 7.15 4.93 0.69

8.29 4.72 0.57

2158 8.00 4.56 0.57

2294 7.80 4.45 0.57

2356 7.48 4.26 0.57

8.71 3.92 0.45

2257 8.39 3.77 0.45

2381 8.19 3.69 0.45

2455 7.93 3.57 0.45

8.97 2.96 0.33

2381 8.71 2.87 0.33

2505 8.58 2.83 0.33

2579 8.32 2.75 0.33

7.64 6.49 0.85

7.96 5.81 0.73

8.29 5.06 0.61

8.71 4.27 0.49

8.97 3.32 0.37

7.64 6.80 0.89

7.96 6.13 0.77

8.29 5.39 0.65

8.71 4.62 0.53

8.97 3.68 0.41

1984

2083

2158

2257

2381

1984

2083

2158

2257

2381

7.31 6.22 0.85

7.64 5.58 0.73

8.00 4.88 0.61

8.39 4.11 0.49

8.71 3.22 0.37

7.31 6.51 0.89

7.64 5.88 0.77

8.00 5.20 0.65

8.39 4.44 0.53

8.71 3.57 0.41

2083

2207

2294

2381

2505

2083

2207

2294

2381

2505

7.02 5.97 0.85

7.41 5.41 0.73

7.80 4.76 0.61

8.19 4.01 0.49

8.58 3.17 0.37

7.02 6.25 0.89

7.41 5.71 0.77

7.80 5.07 0.65

8.19 4.34 0.53

8.58 3.52 0.41

2182

2257

2356

2455

2579

2182

2257

2356

2455

2579

6.76 5.75 0.85

7.15 5.22 0.73

7.48 4.56 0.61

7.93 3.89 0.49

8.32 3.08 0.37

6.76 6.02 0.89

7.15 5.51 0.77

7.48 4.86 0.65

7.93 4.20 0.53

8.32 3.41 0.41

2455

2579

2654

2282

2356

2455

2579

2654

2654

2282

2356

2455

2579

2654

2282

2356

2282

2356

2455

2579

2654

2282

2356

2455

2579

2654

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

18

OB326A-1.qxp 04.2.9 10:41 AM Page 19

PERFORMANCE DATA COOL operation

MS-A24WV -

E1

: MU-A24WV -

E1

(230V)

CAPACITY : 6.5(KW) SHF : 0.63 INPUT : 2480(W)

30

31

31

31

30

30

30

30

29

29

29

29

28

28

28

29

31

31

32

32

32

32

32

27

27

28

28

26

27

27

27

26

26

26

26

25

25

25

25

24

24

24

24

22

23

23

23

INDOOR INDOOR

DB( : ) WB( : )

21

21

22

22

18

20

18

20

35

OUTDOOR DB( : )

40 43

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

6.37 2.87 0.45

6.70 2.21 0.33

6.37 3.12 0.49

6.70 2.48 0.37

2430

2530

2430

2530

5.85 2.63 0.45

6.24 2.06 0.33

5.85 2.87 0.49

6.24 2.31 0.37

2579

2654

2579

2654

5.62 2.53 0.45

6.01 1.98 0.33

5.62 2.76 0.49

6.01 2.22 0.37

2629

2728

2629

2728

22

18

20

22

18

20

22

24

7.09 1.77 0.25

6.37 3.38 0.53

6.70 2.74 0.41

7.09 2.05 0.29

6.37 3.63 0.57

6.70 3.01 0.45

7.09 2.34 0.33

7.48 1.57 0.21

2629

2430

2530

2629

2430

2530

2629

2728

6.63 1.66 0.25

5.85 3.10 0.53

6.24 2.56 0.41

6.63 1.92 0.29

5.85 3.33 0.57

6.24 2.81 0.45

6.63 2.19 0.33

7.02 1.47 0.21

2778

2579

2654

2778

2579

2654

2778

2852

6.40 1.60 0.25

5.62 2.98 0.53

6.01 2.47 0.41

6.40 1.86 0.29

5.62 3.20 0.57

6.01 2.71 0.45

6.40 2.11 0.33

6.83 1.43 0.21

2827

2629

2728

2827

2629

2728

2827

2914

18

20

22

24

18

20

22

24

26

18

20

22

24

26

18

20

6.37 3.89 0.61

6.70 3.28 0.49

7.09 2.62 0.37

7.48 1.87 0.25

6.37 4.14 0.65

6.70 3.55 0.53

7.09 2.90 0.41

7.48 2.17 0.29

7.87 1.34 0.17

6.37 4.40 0.69

6.70 3.82 0.57

7.09 3.19 0.45

7.48 2.47 0.33

7.87 1.65 0.21

6.37 4.65 0.73

6.70 4.08 0.61

2430

2530

2629

2728

2430

2530

2629

2728

2827

2430

2530

2629

2728

2827

2430

2530

5.85 3.57 0.61

6.24 3.06 0.49

6.63 2.45 0.37

7.02 1.76 0.25

5.85 3.80 0.65

6.24 3.31 0.53

6.63 2.72 0.41

7.02 2.04 0.29

7.41 1.26 0.17

5.85 4.04 0.69

6.24 3.56 0.57

6.63 2.98 0.45

7.02 2.32 0.33

7.41 1.56 0.21

5.85 4.27 0.73

6.24 3.81 0.61

2579

2654

2778

2852

2579

2654

2778

2852

2951

2579

2654

2778

2852

2951

2579

2654

5.62 3.43 0.61

6.01 2.95 0.49

6.40 2.37 0.37

6.83 1.71 0.25

5.62 3.65 0.65

6.01 3.19 0.53

6.40 2.63 0.41

6.83 1.98 0.29

7.18 1.22 0.17

5.62 3.88 0.69

6.01 3.43 0.57

6.40 2.88 0.45

6.83 2.25 0.33

7.18 1.51 0.21

5.62 4.10 0.73

6.01 3.67 0.61

2629

2728

2827

2914

2629

2728

2827

2914

3013

2629

2728

2827

2914

3013

2629

2728

22 7.09 3.47 0.49

2629 6.63 3.25 0.49

2778 6.40 3.14 0.49

2827

24 7.48 2.77 0.37

2728 7.02 2.60 0.37

2852 6.83 2.53 0.37

2914

26 7.87 1.97 0.25

2827 7.41 1.85 0.25

2951 7.18 1.80 0.25

3013

18 6.37 4.90 0.77

2430 5.85 4.50 0.77

2579 5.62 4.33 0.77

2629

20 6.70 4.35 0.65

2530 6.24 4.06 0.65

2654 6.01 3.91 0.65

2728

22 7.09 3.76 0.53

2629 6.63 3.51 0.53

2778 6.40 3.39 0.53

2827

24 7.48 3.06 0.41

2728 7.02 2.88 0.41

2852 6.83 2.80 0.41

2914

26 7.87 2.28 0.29

2827 7.41 2.15 0.29

2951 7.18 2.08 0.29

3013

18 6.37 5.16 0.81

2430 5.85 4.74 0.81

2579 5.62 4.55 0.81

2629

20 6.70 4.62 0.69

2530 6.24 4.31 0.69

2654 6.01 4.15 0.69

2728

22 7.09 4.04 0.57

2629 6.63 3.78 0.57

2778 6.40 3.65 0.57

2827

24 7.48 3.36 0.45

2728 7.02 3.16 0.45

2852 6.83 3.07 0.45

2914

26 7.87 2.60 0.33

2827 7.41 2.45 0.33

2951 7.18 2.37 0.33

3013

18 6.37 5.41 0.85

2430 5.85 4.97 0.85

2579 5.62 4.78 0.85

2629

20 6.70 4.89 0.73

2530 6.24 4.56 0.73

2654 6.01 4.39 0.73

2728

22 7.09 4.32 0.61

2629 6.63 4.04 0.61

2778 6.40 3.91 0.61

2827

24

26

18

20

22

24

26

7.48 3.66 0.49

7.87 2.91 0.37

6.37 5.67 0.89

6.70 5.16 0.77

7.09 4.61 0.65

7.48 3.96 0.53

7.87 3.22 0.41

2728

2827

2430

2530

2629

2728

2827

7.02 3.44 0.49

7.41 2.74 0.37

5.85 5.21 0.89

6.24 4.80 0.77

6.63 4.31 0.65

7.02 3.72 0.53

7.41 3.04 0.41

2852

2951

2579

2654

2778

2852

2951

6.83 3.34 0.49

7.18 2.66 0.37

5.62 5.00 0.89

6.01 4.63 0.77

6.40 4.16 0.65

6.83 3.62 0.53

7.18 2.94 0.41

2914

3013

2629

2728

2827

2914

3013

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

19

OB326A-1.qxp 04.2.9 10:41 AM Page 20

PERFORMANCE DATA COOL operation

MS-A30WV -

E1

: MU-A30WV -

E1

(230V)

CAPACITY : 8.5(KW) SHF : 0.62 INPUT : 3260(W)

31

31

31

31

30

30

30

31

32

32

32

32

32

29

29

30

30

28

29

29

29

28

28

28

28

27

27

27

27

26

26

26

27

25

25

26

26

24

24

25

25

23

23

24

24

OUTDOOR DB( : )

INDOOR

DB( :

21

21

)

INDOOR 21 25 27 30

WB(

18

: ) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

9.99

20 10.41

4.39

3.33

0.44

0.32

2608 9.56 4.21 0.44

2738 9.18 4.04 0.44

2869 8.84 3.89 0.44

2999

2738 9.99 3.20 0.32

2901 9.69 3.10 0.32

2967

Q SHC SHF INPUT

9.35 2.99 0.32

3097

22

22

22

23

18

20

22

18

9.99

10.41

10.84

9.99

4.79

3.75

2.60

5.19

0.48

0.36

0.24

0.52

2608

2738

2608

9.56 4.59 0.48

9.99 3.60 0.36

2836 10.46 2.51 0.24

9.56 4.97 0.52

2738

2901

2738

9.18 4.41 0.48

9.69 3.49 0.36

3016 10.20 2.45 0.24

9.18 4.77 0.52

2869

2967

3097

2869

8.84 4.24 0.48

9.35 3.37 0.36

9.78 2.35 0.24

8.84 4.60 0.52

2999

3097

3227

2999

20

22

18

20

22

24

18

20

10.41

10.84

9.99

10.41

10.84

11.39

9.99

10.41

4.17

3.03

5.59

4.58

3.47

2.28

5.99

5.00

0.40

0.28

0.56

0.44

0.32

0.20

0.60

0.48

2738

2608

2738

2608

2738

9.99 4.00 0.40

2836 10.46 2.93 0.28

9.56 5.36 0.56

9.99 4.39 0.44

2836 10.46 3.35 0.32

2967 10.97 2.19 0.20

9.56 5.74 0.60

9.99 4.79 0.48

2901

2738

2901

2738

2901

9.69 3.88 0.40

3016 10.20 2.86 0.28

9.18 5.14 0.56

9.69 4.26 0.44

3016 10.20 3.26 0.32

3130 10.71 2.14 0.20

9.18 5.51 0.60

9.69 4.65 0.48

2967

3097

2869

2967

3097

2869

2967

9.35 3.74 0.40

9.78 2.74 0.28

8.84 4.95 0.56

9.35 4.11 0.44

9.78 3.13 0.32

3227 10.37 2.07 0.20

8.84 5.30 0.60

9.35 4.49 0.48

3097

3227

2999

3097

3227

3390

2999

3097

22

24

18

20

22

24

26

18

10.84

11.39

9.99

10.41

10.84

11.39

11.73

9.99

20 10.41

22 10.84

24 11.39

26 11.73

18 9.99

20 10.41

22 10.84

24 11.39

3.90

2.73

6.39

5.41

4.34

3.19

1.88

6.79

5.83

4.77

3.64

2.35

7.19

6.25

5.20

4.10

0.36

0.24

0.64

0.52

0.40

0.28

0.16

0.68

0.56

0.44

0.32

0.20

0.72

0.60

0.48

0.36

2836 10.46 3.76 0.36

2967 10.97 2.63 0.24

2608

2738

2608

2738

2608

2738

9.56 6.12 0.64

9.99 5.19 0.52

2836 10.46 4.18 0.40

2967 10.97 3.07 0.28

3130 11.39 1.82 0.16

9.56 6.50 0.68

9.99 5.59 0.56

2836 10.46 4.60 0.44

2967 10.97 3.51 0.32

3130 11.39 2.28 0.20

9.56 6.89 0.72

9.99 5.99 0.60

2836 10.46 5.02 0.48

2967 10.97 3.95 0.36

3016 10.20 3.67 0.36

3130 10.71 2.57 0.24

2738

2901

2738

2901

2738

2901

9.18 5.88 0.64

9.69 5.04 0.52

3016 10.20 4.08 0.40

3130 10.71 3.00 0.28

3293 11.22 1.80 0.16

9.18 6.24 0.68

9.69 5.43 0.56

3016 10.20 4.49 0.44

3130 10.71 3.43 0.32

3293 11.22 2.24 0.20

9.18 6.61 0.72

9.69 5.81 0.60

3016 10.20 4.90 0.48

3130 10.71 3.86 0.36

3097

2869

2967

3097

2869

2967

3097

2869

2967

3097

9.78 3.52 0.36

3227 10.37 2.49 0.24

8.84 5.66 0.64

9.35 4.86 0.52

9.78 3.91 0.40

3227 10.37 2.90 0.28

3390 10.88 1.74 0.16

8.84 6.01 0.68

9.35 5.24 0.56

9.78 4.30 0.44

3227 10.37 3.32 0.32

3390 10.88 2.18 0.20

8.84 6.36 0.72

9.35 5.61 0.60

9.78 4.69 0.48

3227 10.37 3.73 0.36

3227

3390

2999

3097

3227

3390

3488

2999

3097

3227

3390

3488

2999

3097

3227

3390

26 11.73

18 9.99

20 10.41

22 10.84

24 11.39

26 11.73

18 9.99

20 10.41

22 10.84

24 11.39

26 11.73

18 9.99

20 10.41

22 10.84

24 11.39

26 11.73

18 9.99

20 10.41

22 10.84

24 11.39

26 11.73

6.07

5.01

3.75

8.39

7.50

6.50

5.47

4.22

2.82

7.59

6.66

5.64

4.56

3.28

7.99

7.08

8.79

7.91

6.94

5.92

4.69

0.24

0.76

0.64

0.52

0.40

0.28

0.80

0.68

3130 11.39 2.73 0.24

3293 11.22 2.69 0.24

3390 10.88 2.61 0.24

3488

2608 9.56 7.27 0.76

2738 9.18 6.98 0.76

2869 8.84 6.72 0.76

2999

2738 9.99 6.39 0.64

2901 9.69 6.20 0.64

2967 9.35 5.98 0.64

3097

2836 10.46 5.44 0.52

3016 10.20 5.30 0.52

3097 9.78 5.08 0.52

3227

2967 10.97 4.39 0.40

3130 10.71 4.28 0.40

3227 10.37 4.15 0.40

3390

3130 11.39 3.19 0.28

3293 11.22 3.14 0.28

3390 10.88 3.05 0.28

3488

2608 9.56 7.65 0.80

2738 9.18 7.34 0.80

2869 8.84 7.07 0.80

2999

2738 9.99 6.79 0.68

2901 9.69 6.59 0.68

2967 9.35 6.36 0.68

3097

0.56

0.44

0.32

0.84

0.72

0.60

0.48

0.36

2836 10.46 5.85 0.56

2967 10.97 4.82 0.44

3130 11.39 3.64 0.32

2608

2738

9.56 8.03 0.84

9.99 7.19 0.72

2836 10.46 6.27 0.60

2967 10.97 5.26 0.48

3130 11.39 4.10 0.36

3016 10.20 5.71 0.56

3130 10.71 4.71 0.44

3293 11.22 3.59 0.32

2738

2901

9.18 7.71 0.84

9.69 6.98 0.72

3016 10.20 6.12 0.60

3130 10.71 5.14 0.48

3293 11.22 4.04 0.36

3097

2869

2967

3097

9.78 5.47 0.56

3227 10.37 4.56 0.44

3390 10.88 3.48 0.32

8.84 7.43 0.84

9.35 6.73 0.72

9.78 5.87 0.60

3227 10.37 4.98 0.48

3390 10.88 3.92 0.36

3227

3390

3488

2999

3097

3227

3390

3488

0.88

0.76

0.64

0.52

2608 9.56 8.42 0.88

2738 9.18 8.08 0.88

2869 8.84 7.78 0.88

2999

2738 9.99 7.59 0.76

2901 9.69 7.36 0.76

2967 9.35 7.11 0.76

3097

2836 10.46 6.69 0.64

3016 10.20 6.53 0.64

3097 9.78 6.26 0.64

3227

2967 10.97 5.70 0.52

3130 10.71 5.57 0.52

3227 10.37 5.39 0.52

3390

0.40

3130 11.39 4.56 0.40

3293 11.22 4.49 0.40

3390 10.88 4.35 0.40

3488

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

20

OB326A-1.qxp 04.2.9 10:41 AM Page 21

PERFORMANCE DATA COOL operation

MS-A30WV -

E1

: MU-A30WV -

E1

(230V)

CAPACITY : 8.5(KW) SHF : 0.62 INPUT : 3260(W)

INDOOR INDOOR

DB( : )

21

21

22

22

22

23

23

23

24

24

24

24

25

25

25

25

26

26

26

26

26

27

27

27

27

27

28

28

28

28

28

29

29

29

29

29

30

30

30

30

30

31

31

31

31

31

32

32

32

32

32

WB(

OUTDOOR DB( : )

40

18 8.33 3.67 0.44

3195 7.65 3.37 0.44

3390 7.35 3.24 0.44

3456

20 8.76 2.80 0.32

3325 8.16 2.61 0.32

3488 7.86 2.52 0.32

3586

18 8.33 4.00 0.48

3195 7.65 3.67 0.48

3390 7.35 3.53 0.48

3456

20

22 9.27 2.22 0.24

3456 8.67 2.08 0.24

3651 8.37 2.01 0.24

3716

18 8.33 4.33 0.52

3195 7.65 3.98 0.52

3390 7.35 3.82 0.52

3456

20 8.76 3.50 0.40

3325 8.16 3.26 0.40

3488 7.86 3.15 0.40

3586

22

18 8.33 4.66 0.56

3195 7.65 4.28 0.56

3390 7.35 4.12 0.56

3456

20 8.76 3.85 0.44

3325 8.16 3.59 0.44

3488 7.86 3.46 0.44

3586

22 9.27 2.96 0.32

3456 8.67 2.77 0.32

3651 8.37 2.68 0.32

3716

24

18 8.33 5.00 0.60

3195 7.65 4.59 0.60

3390 7.35 4.41 0.60

3456

20 8.76 4.20 0.48

3325 8.16 3.92 0.48

3488 7.86 3.77 0.48

3586

22 9.27 3.34 0.36

3456 8.67 3.12 0.36

3651 8.37 3.01 0.36

3716

24

18 8.33 5.33 0.64

3195 7.65 4.90 0.64

3390 7.35 4.71 0.64

3456

20 8.76 4.55 0.52

3325 8.16 4.24 0.52

3488 7.86 4.09 0.52

3586

22 9.27 3.71 0.40

3456 8.67 3.47 0.40

3651 8.37 3.35 0.40

3716

24

26 10.29 1.65 0.16

3716 9.69 1.55 0.16

3879 9.39 1.50 0.16

3961

18 8.33 5.66 0.68

3195 7.65 5.20 0.68

3390 7.35 5.00 0.68

3456

20 8.76 4.90 0.56

3325 8.16 4.57 0.56

3488 7.86 4.40 0.56

3586

22

24 9.78 3.13 0.32

3586 9.18 2.94 0.32

3749 8.93 2.86 0.32

3831

26 10.29 2.06 0.20

3716 9.69 1.94 0.20

3879 9.39 1.88 0.20

3961

18 8.33 6.00 0.72

3195 7.65 5.51 0.72

3390 7.35 5.29 0.72

3456

20

22 9.27 4.45 0.48

3456 8.67 4.16 0.48

3651 8.37 4.02 0.48

3716

24 9.78 3.52 0.36

3586 9.18 3.30 0.36

3749 8.93 3.21 0.36

3831

26 10.29 2.47 0.24

3716 9.69 2.33 0.24

3879 9.39 2.25 0.24

3961

18

20 8.76 5.60 0.64

3325 8.16 5.22 0.64

3488 7.86 5.03 0.64

3586

22 9.27 4.82 0.52

3456 8.67 4.51 0.52

3651 8.37 4.35 0.52

3716

24 9.78 3.91 0.40

3586 9.18 3.67 0.40

3749 8.93 3.57 0.40

3831

26

18 8.33 6.66 0.80

3195 7.65 6.12 0.80

3390 7.35 5.88 0.80

3456

20 8.76 5.95 0.68

3325 8.16 5.55 0.68

3488 7.86 5.35 0.68

3586

22 9.27 5.19 0.56

3456 8.67 4.86 0.56

3651 8.37 4.69 0.56

3716

24

26 10.29 3.29 0.32

3716 9.69 3.10 0.32

3879 9.39 3.01 0.32

3961

18 8.33 7.00 0.84

3195 7.65 6.43 0.84

3390 7.35 6.18 0.84

3456

20 8.76 6.30 0.72

3325 8.16 5.88 0.72

3488 7.86 5.66 0.72

3586

22

24 9.78 4.69 0.48

3586 9.18 4.41 0.48

3749 8.93 4.28 0.48

3831

26 10.29 3.70 0.36

3716 9.69 3.49 0.36

3879 9.39 3.38 0.36

3961

18 8.33 7.33 0.88

3195 7.65 6.73 0.88

3390 7.35 6.47 0.88

3456

20

22 9.27 5.93 0.64

3456 8.67 5.55 0.64

3651 8.37 5.36 0.64

3716

24

: )

35

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

8.76 3.15 0.36

9.27 2.59 0.28

9.78 1.96 0.20

9.78 2.35 0.24

9.78 2.74 0.28

9.27 4.08 0.44

8.76 5.25 0.60

8.33 6.33 0.76

10.29 2.88 0.28

9.78 4.30 0.44

9.27 5.56 0.60

8.76 6.65 0.76

9.78 5.08 0.52

3325

3456

3586

3586

3586

3456

3325

3195

3716

3586

3456

3325

3586

8.16 2.94 0.36

8.67 2.43 0.28

9.18 1.84 0.20

9.18 2.20 0.24

9.18 2.57 0.28

8.67 3.81 0.44

8.16 4.90 0.60

7.65 5.81 0.76

9.69 2.71 0.28

9.18 4.04 0.44

8.67 5.20 0.60

8.16 6.20 0.76

9.18 4.77 0.52

3488

3651

3749

3749

3749

3651

3488

3390

3879

3749

3651

3488

3749

43

7.86 2.83 0.36

8.37 2.34 0.28

8.93 1.79 0.20

8.93 2.14 0.24

8.93 2.50 0.28

8.37 3.68 0.44

7.86 4.72 0.60

7.35 5.59 0.76

9.39 2.63 0.28

8.93 3.93 0.44

8.37 5.02 0.60

7.86 5.98 0.76

8.93 4.64 0.52

3586

3716

3831

3831

3831

3716

3586

3456

3961

3831

3716

3586

3831

26 10.29 4.11 0.40

3716 9.69 3.88 0.40

3879 9.39 3.76 0.40

3961

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

21

OB326A-1.qxp 04.2.9 10:41 AM Page 22

9

MICROPROCESSOR CONTROL

MU-A30WV -

E1

9-1. “I FEEL CONTROL” ( ) OPERATION

9-1-1. COOL mode of “I FEEL CONTROL”

1. Outdoor fan speed control <MU-A30WV>

Outdoor fan speed is controlled according to the temperature of ambient temperature thermistor RT63.

Outdoor fan Low operation : When the outside temperature decreases to 20°C or less.

Until the outside temperature goes to 22°C.

Outdoor fan High operation : Until the outside temperature decreases to 20°C or less.

When the outside temperature goes to 22°C.

Ambient temperature thermistor RT63 temperature

Outdoor fan speed

20 : 22 :

High

Low

NOTE : When indoor fan speed is Low except FAN operation mode and the outside temperature is 30 : or less, the outdoor fan operates at Low.

Outdoor fan Low operation is cancelled according to the following conditions( 1 or 2 ):

1 When the operation is not changed and the outside temperature goes to 33 : or more.

2 When the operation is changed. (Change to FAN operation mode / Change of the indoor fan speed)

2. Discharge temperature protection <MU-A30WV>

The compressor is controlled by the temperature of discharge temperature thermistor RT62 for excess rise protection of compressor discharge pressure.

• Compressor

When the temperature of discharge temperature thermistor RT62 goes to 120 : or more, the compressor is turned OFF.

After 3 minutes since the compressor has been turned OFF, if the temperature of discharge temperature thermistor RT62 becomes 100 : or less, the compressor is turned ON.

9-1-2. DRY mode of “I FEEL CONTROL”

1. Outdoor fan speed control <MU-A30WV>

Outdoor fan speed control is as same as one of COOL mode of “I FEEL CONTROL”.

22

OB326A-1.qxp 04.2.9 10:41 AM Page 23

9-2. LEV control <MU-A30WV>

LEV (Expansion valve) is controlled by “Thermostat ON” commands given from the unit.

Controlled range

Drive speed

Opening set

Stop of indoor unit

Remote controller ON

Power ON (Breaker ON)

Approximate for 2 minutes since compressor has started.

From approximate 2 minutes to approximate 13 minutes

(for 11 minutes) since compressor has started.

After 13 minutes passed since compressor has started.

At thermostat OFF

At thermostat ON

At remote controller OFF

Minimum : 54 pulse, Maximum : 500 pulse

30 ~ 90 pulse / second

The setting is always in opening direction.

(To close the LEV, it is closed to the pulse smaller than the one which is set finally. Then the LEV is opened to the final setting pulse.)

Opening in stop : 150 pulse ➔ LEV opening is set to becomes 500 pulse after 3 minutes passed.

LEV positioning (LEV is closed completely at once)

LEV is positioned. However, afterwards, LEV is not positioned at the first remote controller ON.

Opening is set by the initial opening.

(Initial opening is set according to each operation modes and outer temperature conditions.)

Opening is set by standard opening.

(Standard opening is set according to each operation modes and outer temperature conditions.)

LEV opening is corrected to be once every 2 minutes so that discharge temperature becomes the target discharge temperature.

(When the discharge temperature is lower than target one : LEV is corrected in closed direction, when the discharge temperature is higher than target one :

LEV is corrected in opening direction.)

Opening in stop : 150 pulse ➔ LEV is set to the initial opening after about

3 minutes passed.

Same as the starting of compressor operation

Opening in stop : 150 pulse ➔ LEV is set so that the opening is opened completely at the speed of 4 pulse every 5 seconds in opening after about

3 minutes passed.

(1) LEV opening correction by discharge temperature

The LEV opening is corrected according to the temperature difference between target discharge temperature (Tb) and actual discharge temperature (Ta).

1 The LEV correction is used properly for two kinds according to the LEV opening status at operation off.

Rank

Ta (

Tb+5 to Tb+10

Tb+2 to Tb+5

Tb-2 to Tb+2

Tb-5 to Tb-2

Tb-10 to Tb-5

: less than Tb-10

) more than Tb+10

Opening immediately before having stopped last time

100 pulse or less

Cooling

5

100 pulse or more

Cooling

2

1

20

10

0

-1

2

0

-2

-5

-2

-5

-10

NOTE : Discharge temperature : Ta, Target discharge temperature : Tb

23

OB326A-1.qxp 04.2.9 10:41 AM Page 24

2 When the temperature difference RT between indoor coil thermistor (main) RT12 and indoor coil thermistor (sub)

RT13 in the indoor unit is 2 : or more for a fixed time at cool or dry operation, the target discharge temperature is changed. After the temperature is changed, when temperature difference RT is 3 : or more, the target temperature is changed again. The LEV opening is controlled based on the changed target discharge temperature and the temperature difference RT.

Ta ( : ) less than 2 :

20

RT

2 : or more and less than 3 :

60 more than Tb+10

Tb+5 to Tb+10 10

2 Tb+2 to Tb+5

Tb-2 to Tb+2 0

-2 Tb-5 to Tb-2

Tb-10 to Tb-5 -5

-10 less than Tb-10

NOTE : Discharge temperature : Ta, Target discharge temperature : Tb

20

2

0

-2

-5

-10

3 : or more

60

20

2

0

-2

-5

-10

The target discharge temperature (Tb) is set according to the operation mode or the unit status as follows.

Operation mode Tb ( : )

80 COOL (Normal)

COOL ( RT is less than 2 : , or RT is 2 : or more and less than 3 : .) 70

65 COOL ( RT is 3 : or more.)

NOTE : Target discharge temperature : Tb

NOTE : When the discharge temperature (Ta) is 50 : or less on the cool operation LEV opening is set in 54 pulse.

When this state continues for 20 minutes, the compressor is stopped and restarts in 3 minutes.

When the compressor is stopped, the indoor unit indicates the abnormality of refrigerant system and stops.

(OPERATION INDICATOR lamp is 10-time flashing on and off.)

(2) LEV time chart

Open

Power ON

Opening completely

Remote Operation controller

ON

Standard opening

Initial opening

Thermostat

OFF

Standard opening

Operation

Remote controller

OFF

Opening completely

Remote controller

ON

Thermostat

ON

Initial opening

Operation

Standard opening

Initial opening

Positioning

Opening in stop Opening in stop

Positioning

Close

NOTE : Opening increases and decreases to be in the target discharge temperature during operation.

Time

24

OB326A-1.qxp 04.2.9 10:41 AM Page 25

10

TROUBLESHOOTING

MU-A18WV -

E1

MU-A24WV -

E1

MU-A30WV -

E1

10-1. 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 first turn off the remote controller to stop the main unit, 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.

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 discoloration.

(4) When troubleshooting, refer to the flow chart on page 26.

25

OB326A-1.qxp 04.2.9 10:41 AM Page 26

Start

Indoor unit operates.

Outdoor unit doesn't operate.

Indoor unit operates.

Outdoor unit doesn't operate normally.

Indoor unit doesn't 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.

Outdoor unit doesn't operate even in

Test Run operation.

Outdoor unit doesn't stop even if indoor unit stops.

Indoor unit operates, when the EMERGENCY

OPERATION switch is pressed.

Indoor unit doesn't operate, when the

EMERGENCY

OPERATION switch is pressed.

Check room temperature thermistor.

Refer to

"Test point diagram and voltage".

MU-A30WV

Refer to A

"Check of outdoor unit" on page 28.

MU-A18/A24WV

Check of wiring diagram of outdoor unit on page 9.

MU-A30WV

Refer to B

"Check of outdoor unit" on page 29.

Refer to

"Check of remote controller and receiver

P.C. board".

1. Check indoor /

outdoor

connecting wire.

2. Refer to

"Check of indoor

electronic control

P.C. board".

MU-A30WV

Flash on and off at 0.5second 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 unit

control

system

MU-A30WV

6-time flash

Cause:

Outdoor unit

• Trouble of

thermistor

in outdoor

unit

MU-A30WV

7-time flash

Cause:

Outdoor unit

• Trouble of

outdoor

control

system

MU-A30WV

10-time flash

Cause:

Outdoor unit

• Trouble of

low discharge

temperature

protection

Refer to C

"How to check mis-wiring

(When outdoor unit doesn't work)" on page 29.

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 E

"Check of outdoor thermistor" on page 30.

Replace the deicer

P.C. board.

Refer to D

"Check of

LEV" on page 30.

As for indoor unit, refer to service manual OB325.

26

OB326A-1.qxp 04.2.9 10:41 AM Page 27

10-2. Trouble criterion of main parts

MU-A18WV -

E1

MU-A24WV -

E1

Part name

Discharge temperature thermistor(RT62)

MU-A30WV

MU-A30WV -

E1

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)

Normal

120 k " ~ 800k "

Abnormal

Open or short-circuit

Ambient temperature thermistor(RT63)

MU-A30WV

Measure the resistance with a tester.

(Part temperature –10˚C ~ 40˚C)

5 k

Normal

" ~ 60 k "

Abnormal

Open or short-circuit

Compressor

(MC)

INNER

PROTECTOR

160 i

5 : OPEN

90 i

10 : CLOSE

Measure the resistance between the terminals with a tester.

(Part temperature –10˚C ~ 40˚C)

Terminal

C – R

C – S

MU-A18WV

1.59 " ~ 1.95 "

2.65 " ~ 3.24 "

Normal

MU-A24WV

0.71 " ~ 0.87 "

1.45 " ~ 1.77 "

MU-A30WV

0.56 " ~ 0.71 "

1.43 " ~ 1.76 "

Abnormal

Open or short-circuit

Figure

WHT C

S

AUX

P

MAIN

R

BLK

~

RED

Outdoor fan motor(MF)

INNER

PROTECTOR

MU-A18WV

135 i 5 : OPEN

( 87 i

15 : CLOSE w

)

MU-A24WV

130 i

5 : OPEN

( 83 i 15 : CLOSE w

)

MU-A30WV

135 i 5 : OPEN

( 87 i

15 : CLOSE w

)

Measure the resistance between the terminals with a tester.

(Part temperature –10˚C ~ 40˚C)

Color of lead wire

WHT – BLK

BLK – RED

BLK – YLW

YLW – RED

Normal

MU-A18WV MU-A24WV MU-A30WV

103 " ~ 126 "

89 " ~ 120

"

63

79

"

"

~ 77

~ 96

"

"

55

49

"

"

~ 68

~ 61

"

"

– – 22 " ~ 29 "

Abnormal

Open or short-circuit

LEV(Expansion valve)

MU-A30WV

Measure the resistance with a tester.

(Part temperature : –10˚C ~ 40˚C)

Normal Color of lead wire

WHT – RED

RED – ORN

YLW – BRN

BRN – BLU

41.0 " ~ 49.0 "

Abnormal

Open or short-circuit w Reference value

MU-A18/A24WV

MAIN

AUX

P

BLK RED

MU-A30WV

MAIN

ORN WHT

AUX.1 AUX.2

P

C

BLK YLW RED ORN WHT

WHT

6

RED

1

ORN 4

LEV

P :INNER PROTECTOR

27

OB326A-1.qxp 04.2.9 10:41 AM Page 28

Compressor and/or outdoor fan motor doesn’t operate.

A Check of outdoor unit MU-A30WV

Turn ON the power supply.

Is there 230V AC to between

L

-

N

on the outdoor terminal block ?

Yes

No

Check the outdoor power supply and connection of wiring.

Compressor does not operate.

Is there 5V DC between

P.C. board? w

Yes

Operate the unit in

COOL mode by pressing the EMERGENCY

OPERATION switch.

No

Is there 230V AC between

CN730 1 3 on the deicer

P.C. board? w

Yes

Replace the deicer P.C. board.

No

Rectify the connecting wire.

3minutes after the power supply turns ON, is there 230V AC between A1-A2 on the compressor contactor (52C)?

Yes

No

Is there 230V AC between

2/T1 on the compressor contactor(52C) and N on the outdoor terminal block?

No

Yes

Check the compressor.

Refer to page 27.

Replace the deicer P.C. board.

Is there 230V AC between

1/L1 on the compressor contactor(52C) and N on the outdoor terminal block?

No

Yes

Replace the compressor contactor(52C).

Rectify the connecting wire.

Outdoor fan motor does not operate.

Is there 5V DC between

+

P.C. board? w

Yes

Operate the unit in

COOL mode by pressing the EMERGENCY

OPERATION switch.

No

Is there 230V AC between

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

Yes

Check the outdoor fan motor. Refer to page 27.

No

Is there 230V AC CN730

1 3 on the deicer P.C. board? w

Yes

Replace the deicer P.C. board.

No

Rectify the connecting wire.

Replace the deicer P.C. board.

w Refer to page 31.

28

OB326A-1.qxp 04.2.9 10:41 AM Page 29

Compressor and/or outdoor fan motor doesn’t stop.

B Check of outdoor unit MU-A30WV

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?

Ok

Yes

No Is there 230V AC between

A1-A2 on the compressor contactor (52C)?

Yes

Replace the deicer P.C. board.

No

Is there 230V AC between

2/T1 on the compressor contactor (52C) and

N

on the outdoor terminal block?

Yes

Replace the compressor contactor (52C).

No

Rectify the connecting wire.

After 30 seconds, does outdoor fan motor stop?

Ok

Yes

No

Replace the deicer P.C. board.

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

Outdoor unit doesn’t operate.

C How to check mis-wiring MU-A30WV 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. (indoor/ outdoor unit)

• Press once EMERGENCY OPERATION switch.

After 3 minutes, mis-wiring is indicated

(0.5-second ON, 0.5-second OFF)

on OPERATION INDICATOR lamp on indoor unit.

w

Make them sure.

Yes

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

No

1. Turn OFF the power supply (indoor/ outdoor unit) and disconnect indoor/outdoor connecting wire at the terminal block 3 of the indoor unit.

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

3. Turn ON the power supply (indoor unit) and press once EMERGENCY OPERATION switch.

Is there 20V DC between both ends of

R132 on the indoor electronic control P.C. board ?

( By tester, the stylus is between 0 ~ 20V. )

Yes

• Turn OFF the power supply. (indoor unit)

Disconnect the lead wire that terminal

block N 3 of the indoor unit is short-circuited.

• Connect ON indoor/outdoor connecting

wire.

No

Replace the indoor electronic control P.C. board.

Turn ON the power supply. (outdoor unit)

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

No

Yes

Is there 5V DC between J101 + -J401 - on the deicer P.C. board?

Refer to page 31.

Yes

During EMERGENCY OPERATION, is there

10V DC between both ends of R601on the deicer P.C. board? Refer to page 31.

(By tester, the stylus is between 5 ~10V)

Yes

Replace the deicer P.C. board.

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 page 31.

29

As for indoor unit, refer to service manual OB325.

OB326A-1.qxp 04.2.9 10:41 AM Page 30

When OPERATION INDICATOR lamp flashes 10-time.

Cooling doesn't operate.

D Check of LEV (Expansion valve)

MU-A30WV

1 During pressing OPERATION SELECT button on remote controller, press RESET button.

2 First, release RESET button.

(Confirm all displays of remote controller.)

3 Then release OPERATION SELECT button.

1 During pressing OPERATION SELECT

button on remote controller, press

RESET button.

2 First, release RESET button.

With remote controller set toward the indoor unit, press

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

˚C

CLOCK

AMPM

AMPM

(Confirm all displays of remote controller.)

3 Then release OPERATION SELECT button.

LEV operates in full-opening direction.

Do you hear LEV "click, click·······"?

Do you touch LEV and feel it vibrate?

No

Is LEV coil properly fixed to

the body?

Yes

Does the resistance of LEV coil have the characterictics?

No

Replace the

LEV coil.

Yes

No

Yes

Ok

Properly fix LEV coil to the body.

Replace the deicer P.C. board.

Characteristics of LEV coil

LEV (CN724)

WHT–RED

RED–ORN

YLW–BRN

BRN–BLU

Resistance

41.0 " ~ 49.0 "

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

1. Turn OFF the power supply of the unit 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-A30WV 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 .

Turn OFF the power supply.

Ambient temperature thermistor(RT63)

Measure resistance between CN 662

3 and 4 .

Does the resistancs of thermistor have Yes

Connect CN662.

Turn ON the power supply and press the EMERGENCY

OPERATION switch.

No

Replace the thermistor.

Replace the deicer P.C. board.

No

Does the unit operate

10 minutes or more?

Yes

Ok W .

W

It is thought defective contact of the connector.

30

OB326A-2.qxp 04.2.9 10:42 AM Page 31

MU-A30WV -

E1

Outdoor deicer P.C. board

900

Discharge temperature thermistor(RT62)

800

700

600

500

400

300

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 page 30.)

CN662 3 4

Ambient temperature thermistor (RT63)

(Refer to page 30.)

LEV connector

(CN724)

Fan motor connector

(CN711)

Varistor

(NR62)

J101

5V

DC

+

J401

(Refer to page 28 or 29.)

}

+

R601 10V DC

(Refer to page 29.)

+

}

12V DC

Fuse

3.15A / 250V

Varistor

(NR61)

} CN730 1 3

230V AC

(Refer to page 28 or

29.)

31

OB326A-2.qxp 04.2.9 10:42 AM Page 32

11

DISASSEMBLY INSTRUCTIONS

<"Terminal with lock mechanism" Detaching points>

In case of terminal with lock mechanism, detach the terminal as shown below.

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

The terminal with no lock mechanism can be removed by pulling it out.

Check the shape of the terminal and work.

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

(2) The terminal with this connector is a terminal with lock mechanism

Sleeve

Locking lever

1 Slide the sleeve.

2 Pull the terminal while

pushing the locking

lever.

1 Hold the sleeve, and

pull out the terminal

slowly.

Connector

11-1. MU-A18WV -

E1

OUTDOOR UNIT

OPERATING PROCEDURE

1. Removing the cabinet

(1) Remove the screws of the cabinet.

(2) Hold the down of the cabinet on the both side and remove the cabinet.

Photo 2

Photo 1

PHOTOS

Screws of the cabinet

Screws of the cabinet

Service 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 block (TB1, TB2)

•Compressor contactor (52C)

Photo 3

Outdoor fan capacitor(C2)

Connector Compressor contactor(52C)

32

Compressor capacitor(C1)

Terminal blocks

(TB1, TB2)

OB326A-2.qxp 04.2.9 10:42 AM Page 33

OPERATING PROCEDURE

3. Removing the outdoor fan motor

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

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

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

(4) Remove screws fixing the outdoor fan motor.

(5) Remove the outdoor fan motor.

Photo 4

PHOTOS

Hook

Propeller

Propeller nut

Soundproof felt

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 glass terminal of the compressor.

(6) Recover gas from the refrigerant circuit.

(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.

NOTE

● Before using a burner, reclaim gas from the pipes until the pressure gauge shows 0 kg/cm 2 (MPa).

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

Photo 5

Discharge pipe

Suction pipe

Compressor

Compressor set nuts

33

OB326A-2.qxp 04.2.9 10:42 AM Page 34

11-2. MU-A24WV -

E1

OUTDOOR UNIT

OPERATING PROCEDURE

1. Removing the cabinet

(1) Remove the screws of the cabinet.

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

Photo 1

PHOTOS

Screws

Service panel

Photo 2

Screws

Photo 3 Outdoor fan capacitor (C2)

Connector Relay (X1)

2. Removing the electrical parts

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

(2) Remove the following parts.

•Compressor capacitor (C1)

•Outdoor fan capacitor (C2)

•Terminal block(TB1, TB2)

•Relay (X1)

•Compressor contactor (52C)

34

Compressor capacitor (C1)

Compressor contactor (52C)

Terminal blocks

(TB1, TB2)

OB326A-2.qxp 04.2.9 10:42 AM Page 35

OPERATING PROCEDURE

3. Removing the outdoor fan motor

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

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

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

(4) Remove the screws fixing the fan motor.

(5) Remove the outdoor fan motor.

Photo 4

PHOTOS

Hook

Propeller

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 the lead wires from the glass terminal of the compressor.

(5) Recover 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.

NOTE

● Before using a burner, reclaim gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0MPa).

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

Photo 5

Discharge pipe

Compressor

Propeller nut

Suction pipe

Compressor set nuts

35

OB326A-2.qxp 04.2.9 10:42 AM Page 36

11-3. MU-A30WV -

E1

OUTDOOR UNIT

OPERATING PROCEDURE

1.Removing the cabinet

(1) Remove the screws 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 front panel

Screws of the top panel

Screw of the valve cover

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.

Photo 4 Deicer P.C. board

Terminal blocks

36

Screws of the relay panel

Screws of the relay panel

OB326A-2.qxp 04.2.9 10:42 AM Page 37

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

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.

(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.

NOTE

● Before using a burner, reclaim gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa).

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

Photo 6

Discharge pipe

Suction pipe

Compressor set nuts

Terminal cover

37

OB326A-2.qxp 04.2.9 10:42 AM Page 38

12

PARTS LIST

MU-A18WV -

MU-A24WV -

E1

E1

12-1. OUTDOOR UNIT

STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS

20

18

17

1

19

16

2

15

14

13

12

11

3

10

9

4 5 6 7 8

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

No.

Part No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

E02 817 233

E02 817 232

E02 817 521

E02 141 501

E02 139 515

E02 075 506

E02 527 506

E02 817 900

E02 821 900

E02 817 290

E02 818 290

E02 817 661

E02 818 661

E02 817 662

E02 817 245

E02 144 301

E02 818 301

E02 817 630

E02 818 630

E02 466 383

E02 818 374

E02 817 374

E02 138 351

E02 817 353

E02 818 353

E07 012 340

E02 817 009

E02 412 936

E02 076 936

E02 820 936

E02 466 340

E02 466 340

BACK PANEL

CABINET

GRILLE

PROPELLER

MOTOR SUPPORT

COMPRESSOR RUBBER SET

COMPRESSOR RUBBER SET

COMPRESSOR

COMPRESSOR

BASE

BASE

STOP VALVE(GAS)

STOP VALVE(GAS)

STOP VALVE(LIQUID)

SERVICE PANEL

OUTDOOR FAN MOTOR

OUTDOOR FAN MOTOR

OUTDOOR HEAT EXCHANGER

OUTDOOR HEAT EXCHANGER

SURGE ABSORBER

TERMINAL BLOCK

TERMINAL BLOCK

OUTDOOR FAN CAPACITOR

COMPRESSOR CAPACITOR

COMPRESSOR CAPACITOR

COMPRESSOR CONTACTOR

HANDLE

CAPILLARY TUBE

CAPILLARY TUBE

CAPILLARY TUBE

COMPRESSOR CONTACTOR

RELAY

Part Name

Symbol in Wiring

Diagram

Q'ty/unit

MU-A18WV- E1 MU-A24WV- E1

1

1

1

1

1

3

1

1

1

1

1

4

MC

MC

1

1

1

1

1

MF

MF

1

1

1

1

1

1

1

1

DSAR

TB2

TB1

C2

C1

C1

52C

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

52C

X1

1

1

1

Remarks

3RUBBERS/SET

4RUBBERS/SET

RN196VHSHT

NN29VBAHT

{ 12.7

{ 15.88

{ 6.35

RA6V50 -

RA6V60 -

2P

3P

3.0

+ /440V AC

40 + /440V AC

55 + /440V AC

{ 3.0

o{ 1.6

o 600

{ 3.0

o{

2.0

o

900

{ 2.5

o{ 0.6

o 1000

38

OB326A-2.qxp 04.2.9 10:42 AM Page 39

MU-A30WV -

E1

12-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS

AND FUNCTIONAL PARTS

25 24 23 22 21

1

2

3

4

6

7

8 15

5

13

9 10 11 12

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

No.

Part No.

Part Name

Symbol in Wiring

Diagram

29

30

31

32

33

25

26

27

28

21

22

23

24

17

18

19

20

13

14

15

16

9

10

11

12

7

8

5

6

3

4

1

2

E02 128 383

E02 821 374

E02 817 374

E02 064 351

E02 819 451

E02 819 340

E02 819 353

E02 819 233

E02 817 009

E02 726 515

E02 822 640

E02 819 493

E02 127 382

E02 336 385

E02 214 386

E02 819 936

E02 262 936

E02 527 936

E02 819 297

E02 819 630

TOP PANEL

OUTDOOR HEAT EXCHANGER

E02 819 301 OUTDOOR FAN MOTOR

E02 214 501

E02 819 290

E02 819 232

E02 819 009

PROPELLER

BASE

CABINET

HANDLE

E02 819 521

E02 527 506

E02 819 900

E02 819 661

E02 819 662

E02 819 650

E02 819 245

E02 819 309

FAN GUARD

COMPRESSOR RUBBER SET

COMPRESSOR

STOP VALVE(GAS)

STOP VALVE(LIQUID)

VALVE COVER

SERVICE PANEL

THERMISTOR

SURGE ABSORBER

TERMINAL BLOCK

TERMINAL BLOCK

OUTDOOR FAN CAPACITOR

DEICER P.C. BOARD

COMPRESSOR CONTACTOR

COMPRESSOR CAPACITOR

BACK PANEL(OUT)

HANDLE

MOTOR SUPPORT

EXPANSION VALVE

EXPANSION VALVE COIL

FUSE

VARISTOR

CZ SURGE ABSORBER

CAPILLARY TUBE(TAPER PIPE)

CAPILLARY TUBE

CAPILLARY TUBE

MF

MC

RT62, RT63

DSAR

TB2

TB1

C2

52C

C1

LEV

F61

NR61

CZ

Q'ty/unit

MU-A30WV - E1

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

39

20

19

18

17

16

15

14

Remarks

RA6V75-

4RUBBERS/SET

NN37VAAHT

{ 15.88

{ 9.52

DISCHARGE, AMBIENT

2P

3P

4.0

+ /440V AC

60 + /440V AC

250V/3.15A

{ 3.6x

{ 2.4x50

{ 4.0x

{ 2.4x200

{ 4.0x

{ 2.4x100

OB326A-2.qxp 04.2.9 10:42 AM Page 40

HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN

C Copyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD

Distributed in Feb. 2004. No.OB326 REVISED EDITION-A 6

Distributed in Dec. 2003. No.OB326 6

Made in Japan

New publication, effective Feb. 2004

Specifications subject to change without notice.

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