Mitsubishi OB307C Service Manual

SERVICE MANUAL

HFC

utilized

R410A

SPLIT-TYPE, AIR CONDITIONERS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type
Models

MSC-A07WV ­MSC-A09WV ­MSC-A12WV ­MSC-A07WV ­MSC-A09WV ­MSC-A12WV -

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

· MU-A07WV -

· MU-A09WV -

· MU-A12WV -

· MUH-A07WV -

· MUH-A09WV -

· MUH-A12WV -

Revision C:

●MUX-A10/A19/A20/A25/A26WV - can be
connected to MSC-A07/A09/A12YV -

Please void OB307 REVISED EDITION-B.

E1

E1

.

No. OB307

REVISED EDITION-C

E1E1
E1E1
E1E1

E1E1
E1E1
E1E1

Multi system type
Models

MSC-A07WV ­MSC-A09WV ­MSC-A12WV -

MSC-A07WV ­MSC-A09WV ­MSC-A12WV -

Remote
controller

E1

E1

E1

(WH)
(WH)
(WH)

Indication of
model name

· MUX-A10WV -

· MUX-A19WV -

· MUX-A20WV -

· MUX-A25WV -

· MUX-A26WV -

E1E1
E1E1
E1E1
E1
E1

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················6

3. INDOOR / OUTDOOR
CORRESPONDENCE TABLE ···························8

4. SPECIFICATION·················································9

5. NOISE CRITERIA CURVES·····························15

6. OUTLINES AND DIMENSIONS·······················18

7. WIRING DIAGRAM ··········································22

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

9. PERFORMANCE CURVES······························40

10. MICROPROCESSOR CONTROL ····················75

11. SERVICE FUNCTIONS·····································86

12. TROUBLESHOOTING ······································88

13. DISASSEMBLY INSTRUCTIONS···················105

14. PARTS LIST····················································116

NOTE:

•As for indoor units MSC-A07/A09/A12YV - , refer to the service manual OB329.

•As for outdoor units MUX-A22WV - , refer to the service manual OB318 REVISED EDITION-A.

•As for outdoor units MXZ-A18/A26/A32WV - , refer to the service manual OB319.

E1

E1

E1

Revision C:

•MUX-A10/A19/A20/A25/A26WV - can be connected to MSC-A07/A09/A12YV -

E1E1

.

1

MSC-07RV- ➔MSC-A07WV-

MSC-09RV- ➔MSC-A09WV­MSC-12RV- ➔MSC-A12WV-

1. Rated voltage has changed. (220-240V➔230V)

2. Indoor model has changed.

MU-07RV- ➔MU-A07WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH130VGCT➔RN092VHSHT)

MU-09RV- ➔MU-A09WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH140VGCT➔RN099VHSHT)

MU-12RV- ➔MU-A12WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH220VHAT➔RN135VHSHT)

MUH-07RV- ➔MUH-A07WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH130VGCT➔RN092VHSHT)

TECHNICAL CHANGES

E1E4

E1E4

E1E4

E1E4

E1E4

E1E4

E1E4

MUH-09RV- ➔MUH-A09WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH165VGCT➔RN104VHSHT)

MUH-12RV- ➔MUH-A12WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH220VHAT➔RN135VHSHT)

MUX-10RV- ➔MUX-A10WV-

1. Outdoor model has changed.

2. Refrigerant has changed. (R22➔R410A)

MUX-19TV- ➔MUX-A19WV­MUX-20TV- ➔MUX-A20WV­MUX-25TV- ➔MUX-A25WV-

1. Refrigerant has changed. (R22➔R410A)

MUX-24RV- ➔MUX-A26WV-

1. Outdoor model has changed.

2. Refrigerant has changed. (R22➔R410A)

E1E4

E1E4

E1E2

E1E1

E1E1

E1E1

E1E2

2

Refrigerating

oil

Refrigerant

New refrigerant

R410A

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

Pseudo-azeotropic refrigerant

Not included

A1/A1

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

Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (:)
Steam pressure [25:](Mpa)
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell

w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO

2

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

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.

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

Compressor

Suction muffler

Oil back hole

Refrigerating oil

Refrigerant

Compressor

Suction muffler

Oil back hole

Refrigerating oil /Refrigerant

Compressor

• 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.

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/ff[Gauge])

3

-30 -20 -10 0 10 20

30

40 50 60

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

(MPa [Gauge])

R410A
R22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(:)

NOTE : The unit of pressure has been changed to MPa on the

R410A tools Can R22 tools be used?

Gas leak detector

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

Description

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

No

No

Yes

Yes

New

New

New

Gauge manifold

Charge hose

Torque wrench

Flare tool
Flare gauge

Vacuum pump
adapter

Electronic scale for
refrigerant charging

No : Not Substitutable for R410A Yes : Substitutable for R410A

No 12.7 mm

Wall
thickness

Outside diameter

Pipe

mm

For liquid
For gas

6.35

9.52

12.7

0.8 mm

0.8 mm

0.8 mm

Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm

Insulation material

international system of units(SI unit system).

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

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.

2.Refrigerant piping

1 Specifications

Use the refrigerant pipes that meet the following specifications.

• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less
than 0.8mm, as the pressure resistance is insufficient.

4

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

Dimension of flare nut

R410A

17
22
26

R22

17
22
24

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

Refrigerant gas
cylinder
operating valve

Liquid pipe
Gas pipe

Service port

Outdoor unit

Gauge manifold
valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder
for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging

5

2

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSC-A07WV ­MSC-A09WV ­MSC-A12WV -

Panel

Air filter

Air outlet

Horizontal vane

E1

E1

E1

Air cleaning filter
(White bellows type)

Deodorizing filter
(Gray sponge type)

Vertical vane

Operation section

Front panel

Air inlet

to Breaker

Power supply cord

Remote control
receiving section

Remote controller

Display section

(When the front panel is opened)

Emergency operation switch

OUTDOOR UNIT

MU-A07WV - MUH-A07WV ­MU-A09WV - MUH-A09WV ­MU-A12WV - MUH-A12WV -

Air inlet

(back and side)

Piping

Drain hose

Operation indicator lamp

Receiving section

E1E1

E1E1

E1E1

MUX-A10WV-

E1

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

Air outlet

Drain outlet

6

OUTDOOR UNIT

Installation plate
Installation plate fixing screw 4 o 25 mm
Remote controller holder
Fixing screw for 3 3.5 o 16 mm
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
Deodorizing filter
Air cleaning filter
Refrigerant oil

1
5
1
2
2
1
1
1
1
1

<Indoor unit>

1

2

3

4

5

6

7

8

9

0

Drain socket
Drain cap

1
2

<Outdoor unit: MUH type>

1

2

MUX-A19WV- MUX-A25WV­MUX-A20WV-

E1

ACCESSORIES

MSC-A07WV­MSC-A09WV­MSC-A12WV-

E1

E1

E1

E1E1

Air inlet

(Back and side)

Air outlet

Piping

Drainage hose

Drain outlet

MUX-A26WV-

MUH-A07WV­MUH-A09WV­MUH-A12WV-

E1

Air inlet

(Back and side)

Air outlet

Piping

Drainage hose

Drain outlet

E1

E1

E1

7

MUX-A19WV-

E1

MUX-A25WV-

E1

MUX-A20WV-

E1

MUX-A10WV-

E1

MUX-A26WV-

E1

Combination of

the connectable

indoor units

OUTDOOR UNIT

A: MSC-A12WV- E1

or

MSC-A12YV-

E1

B: MSC-A07WV- E1

or

MSC-A07YV-

E1

A:

MSC-A09WV- E1

B:

or

C:

MSC-A09YV- E1

A:
B:

A:
B:

A:

MSC-A12WV- E1
or
B:

MSC-A12YV- E1

C:

MSC-A09WV- E1

or

D:

MSC-A09YV- E1

MSC-A12WV- E1

or

MSC-A12YV- E1

MSC-A07WV- E1

or

MSC-A07YV-

E1

REMOTE CONTROLLER

MSC-A07WV ­MSC-A09WV ­MSC-A12WV -

E1

E1

E1

Signal transmitting section

Operation display section

OPERATE /STOP
(ON /OFF)button

Open the front lid.

ON/OFF

TOO

WARM

PM

AM

TOO

COOL

TEMPERATURE buttons

CLOCK

PM

AM

TOO

WARM

FAN

VANE

RESET

CLOCK

TOO

COOL

STOP

START

HR.

MIN.

OFF-TIMER button
ON-TIMER button

HR. button

MIN. button

(TIME SET button)

CLOCK SET button

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

RESET button

ON/OFF

I FEEL

COOL

HEAT

DRY

/FAN

/

MODE

ECONO COOL

VANE CONTROL button

INDOOR / OUTDOOR CORRESPONDENCE TABLE3

MSC-A07WV - MSC-A09WV - MSC-A12WV ­MUX-A10WV - MUX-A19WV - MUX-A20WV - MUX-A25WV - MUX-A26WV -

E1E1E1

E1E1E1E1E1

8

4

Indoor model

Function

Indoor unit power supply

Air flow(High/Med. /Low )
Power outlet
Running current
Power input
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High/Med. /Low )
Fan speed (High/Med. /Low )
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Outdoor model

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

Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity (R410A)
Refrigerating oil (Model)



K /h

A
A

W

%

A
A

"



mm

kg

dB

rpm

k"
k"

kW

R/h

K /h

A
A

W

A(kW)

%

A
A
A

W

"





"



mm

kg

dB

rpm

kg
cc

MSC-A07WV -

E1

Single phase

230V,50Hz

10

0.17
35
90
—

0.17

WHT-BLK 413
BLK-RED 334
815O278O217

9
5

3
10
10

MU-A07WV -

E1

Single phase

230V,50Hz

10

—

2.76

0.22

RN092VHSHT

600
C-R 3.87
C-S 6.14

RA6V23-FC

WHT-BLK 353

BLK-RED 321
780o540o255

34
45

735

1

0.75

350 (NEO22 )

Cooling

474/372 /276

RC4V19-LA

36/31 /25

900/750 /600

2.3

0.9

1,686

2.98
675

98
23

3.24

MSC-A09WV - E1

Single phase

230V,50Hz

10

0.17
35

RC4V19-LA
WHT-BLK 413
BLK-RED 334
815O278O217

9
5

3
10
10

MU-A09WV -

E1

Single phase

230V,50Hz

10

—

RN099VHSHT

700
C-R 3.40
C-S 4.56

RA6V23-FC
WHT-BLK 353
BLK-RED 321

780o540o255

34
45

735

1

0.80

350 (NEO22 )

Cooling

474/384 /306

90
—

0.17

36/31 /25

900/770 /650

2.55

1.1

1,686

3.26
745

99
24

3.04

0.22

3.27

MSC-A12WV - E1

Single phase

230V,50Hz

582/444 /324

10

0.19
40

RC4V19-KA
WHT-BLK 316
BLK-RED 299
815O278O217

10

5

3
10
10

MU-A12WV -

E1

Single phase

230V,50Hz

1.6

1,914

10

4.91

—
97
29

RN135VHSHT

900
C-R 2.79
C-S 3.36

RA6V33-DC
WHT-BLK 301
BLK-RED 332

780o540o255

36
49

825

1

0.83

620 (NEO22)

Cooling

92
—

0.19

40/33 /26

930/760 /600

3.45

1,100

4.60

0.31

3.03

Electrical

data

Fan

motor

Special

remarks

Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity

Coefficient of performance(C.O.P)

Outdoor unit power supply

Capacity

ww

ww

w

w

w

w

w

w

w

w

w

w

ww

w

w

ww

ww

w

w

SPECIFICATION

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C
Indoor-Outdoor piping length : 5m

w Reference value

Outdoor DB35°C WB24°C

9

Indoor model

Function

Indoor unit power supply

Air flow(High/Med. /Low )
Power outlet
Running current
Power input
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High/Med. /Low )
Fan speed(High/Med. /Low )
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Outdoor model

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

Model
Output
Winding
resistance (at 20:)
Model
Winding
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity (R410A)
Refrigerating oil (Model)
Thermistor RT61 (at 0:)



K /h

A

A
W
%

A

A

"



mm

kg

dB

rpm

k"
k"

kW

R/h

K /h

A

A
W

A(kW)

%

A

A

A

W

"





"



mm

kg
dB

rpm

kg

cc

k"

MSC-A07WV -

E1

Single phase

230V,50Hz

10

0.17
35
90
—

0.17

RC4V19-LA
WHT-BLK 413
BLK-RED 334
815O278O217

9
5

3
10
10

MUH-A07WV -

E1

Single phase

230V,50Hz

1,686

10

—

23

0.22

RN092VHSHT

600
C-R 3.87
C-S 6.14

RA6V23-FB

WHT-BLK 353

BLK-RED 321
780o540o255

35
47

735

1

0.75

350 (NEO22)

33.18

Cooling

474/372 /276

36/31 /25

900/750 /600

2.3

0.9

2.98
675

98

2.76

3.24

Heating

510/420 /342

36/31 /25

950/820 /700

2.5
—

2.86
655

100

2.64

3.62

MSC-A09WV - E1

Single phase

230V,50Hz

10

0.17
35
90
—

0.17

RC4V19-LA
WHT-BLK 413
BLK-RED 334
815O278O217

9
5

3
10
10

MUH-A09WV -

E1

Single phase

230V,50Hz

1,710

10

—

24

0.31

RN104VHSHT

700
C-R 3.40
C-S 4.56

RA6V33-DB
WHT-BLK 301
BLK-RED 332

780o540o255

38
49

825

1

1.10

350 (NEO22)

33.18

Cooling

474/384 /306

36/31 /25

900/770 /650

2.55

1.1

3.26
745

99

2.95

3.27

Heating

588/456 /342

39/32 /25

1,050/870 /700

3.05
—

3.52

805

99

3.21

3.69

MSC-A12WV - E1

Single phase

230V,50Hz

10

0.19
40
92
—

0.19

RC4V19-KA
WHT-BLK 316
BLK-RED 299
815O278O217

10

5

3
10
10

MUH-A12WV -

E1

Single phase

230V,50Hz

1,710

10

—

29

0.31

RN135VHSHT

900

C-R 2.79

C-S 3.36

RA6V33-DB
WHT-BLK 301
BLK-RED 332

780o540o255

40
49

825

1

1.15

620 (NEO22)

33.18

Cooling

582/444 /324

40/33 /26

930/760 /600

3.4

1.6

4.51

1,020

98

4.20

3.21

Heating

606/498 /396

39/33 /26

960/830 /700

3.9
—

4.61

1,040

98

4.30

3.61

Electrical

data

Fan

motor

Special

remarks

Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity

Coefficient of performance (C.O.P)

Outdoor unit power supply

Capacity

ww

ww

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

w

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C
Indoor-Outdoor piping length : 5m

w Reference value

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

10

NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV).

Outdoor model
Function

Outdoor unit power supply

Indoor unit No.

Capacity
Dehumidification
Outdoor air flow

Capacity

Power outlet
Running current
Power input
Auxiliary heater
Power factor

Electrical

data

Starting current
Compressor motor current
Fan motor current

kW

R/h

K /h

A
A

W

A(kW)

%

A
A
A

Coefficient of performance (C.O.P)

Model
Output
Winding

Compressor

resistance (at 20:)

W

"

Model
Winding

Fan

motor

resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed

"

mm

kg

dB

rpm
Fan speed regulator
Refrigerant filling

Special

remarks

capacity (R410A)
Refrigerating oil (Model)

kg
cc

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C

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

Indoor-Outdoor piping length : 5m

MUX-A10WV -

Cooling

Single phase

230V,50Hz

Single

Double

A or B

2.4

0.9
1,914

10

3.20
725

—

98.5

21

2.91

0.29

3.16

RN092VHSHT

600
C-R 3.87
C-S 6.14

RA6V33-FC

WHT-BLK 223

BLK-RED 221
780O540O255

35
49

825

1

0.90 (Room A+B)
350 (NEO22)

E1

A+B

1.4O2

0.2O2

3.25
730

97.7

2.96

3.50

MUX-A19WV -

Cooling

Single phase

230V,50Hz

Single

A

3.5

1.4

Single

B

2.4

0.9

E1

Double

A+B

3.5+2.4

1.4+0.9

2,460

20

5.73

1,280

3.51
785

8.96

2,005

—

97.1

97.2

97.3

48

5.16

2.94

8.39

0.57

2.65

2.93

2.84

MC1 : RN145VHSHT, MC2 : RN092VHSHT

MC1 : 1,000, MC2 : 600

C-R 2.43

MC1 : , MC2 :

C-S 3.80

C-R 3.87

C-S 6.14

RA6V60-GA

WHT-BLK 90
BLK-RED 146
840O640O330

66
52

730

1

1.00 (Room A)

0.80 (Room B)

MC1 : 620 (NEO22), MC2 : 350 (NEO22)

11

Outdoor model
Function

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

Model
Output
Winding
resistance (at 20:)
Model
Winding
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity (R410A)
Refrigerating oil (Model)

kW

R/h

K /h

A
A

W

A(kW)

%

A
A
A

W

"

"

mm

kg

dB

rpm

kg
cc

Single phase

230V,50Hz

Double

A+B or A+C

2.6+2.8

0.9+1.1
2,460

20

8.18

1,850

—

98.3
47

7.61

0.57

2.81

MC1 : RN099VHSHT, MC2 : RN125VHSHT

MC1 : 650, MC2 : 800

RA6V60-GA

WHT-BLK 90
BLK-RED 146
840O640O330

65
52

730

1

0.80 (Room A)

1.00 (Room B+C)

MC1 : 350 (NEO22), MC2 : 350 (NEO22)

MUX-A20WV -

E1

Cooling

Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity

Coefficient of performance (C.O.P)

Outdoor unit power supply

Indoor unit No.

Single

A

2.6

0.9

3.64
815

97.3

3.07

3.06

Single
B or C

2.9

1.2

4.86

1,075

96.2

4.29

2.61

Double

B+C

1.75O2

0.3O2

4.86

1,090

97.5

4.29

3.02

Triple

A+B+C

2.5+1.75O2

0.8+0.3O2

8.41

1,885

97.5

7.84

3.02

C-R 3.40
C-S 4.56

MC1 : , MC2 :

C-R 2.86
C-S 5.72

NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV).

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C
Indoor-Outdoor piping length : 5m

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

12

NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV).

E1

Outdoor model
Function

Outdoor unit power supply

MUX-A25WV -

Cooling

Single phase 230V,50Hz

Indoor unit No.

Capacity
Dehumidification
Outdoor air flow

Capacity

Power outlet
Running current
Power input
Auxiliary heater
Power factor

Electrical

data

Starting current
Compressor motor current
Fan motor current

kW

R/h

K /h

A
A

W

A(kW)

%

A
A
A

Coefficient of performance (C.O.P)

Model
Output
Winding

Compressor

resistance (at 20:)

W

"

Model
Winding

Fan

motor

resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed

"

mm

kg
dB

rpm
Fan speed regulator
Refrigerant filling

Special

remarks

capacity (R410A)
Refrigerating oil (Model)

kg
cc

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C

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

Indoor-Outdoor piping length : 5m

Single
A or B

3.5

1.4
2,460

20

5.88

1,300

—

96.1
54

5.31

0.57

2.61

MC1 : RN145VHSHT, MC2 : RN145VHSHT

MC1 : 1,000, MC2 : 1,000

C-R 2.43

MC1 : , MC2 :

C-S 3.80

C-R 2.43
C-S 3.80

RA6V60-GA

WHT-BLK 90
BLK-RED 146
840O640O330

68
52

730

1

0.95 (Room A)

0.95 (Room B)

MC1 : 620 (NEO22), MC2 : 620 (NEO22)

Double

A+B

3.5O2

1.4O2

11.49
2,540

96.1

10.92

2.67

13

Outdoor model
Function

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

Model
Output
Winding
resistance (at 20:)
Model
Winding
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity (R410A)
Refrigerating oil (Model)

kW

R/h

K /h

A
A

W

A(kW)

%

A
A
A

W

"

"

mm

kg
dB

rpm

kg
cc

Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity

Coefficient of performance (C.O.P)

Outdoor unit power supply

Indoor unit No.

MUX-A26WV -

E1

Cooling

Single phase 230V,50Hz

2,760

20

—

52

0.53

MC1 : RN145VHSHT, MC2 : RN125VHSHT

MC1 : 1,000, MC2 : 800

RA6V60-FA
WHT-BLK 79
BLK-RED 80

840O850O330

76
52

730

1

1.05 (Room A+B)

1.05 (Room C+D)

MC1 : 620 (NEO22), MC2 : 350 (NEO22)

Single
A or B

3.4

1.2

5.28

1,180

97.2

4.75

2.79

Single

C or D

2.75

1.1

4.54

1,015

97.2

4.01

2.62

Double

A+B

1.95O2

0.2O2

5.46

1,210

96.4

4.93

3.02

Double

A+C or A+D

or

B+C or B+D

Triple

A+B+C

or

A+B+D

Triple

A+C+D

or

B+C+D

3.4+2.7

1.2+1.1

9.57

2,095

95.2

9.04

2.81

Double

C+D

1.7O2

0.3O2

4.78

1,060

96.4

4.25

3.01

1.95O2+2.8

0.2O2+1.1

9.61

2,105

95.2

9.08

3.02

3.4+1.7O2

1.2+0.3O2

9.66

2,140

96.3

9.13

3.02

Four

A+B+C+D

1.95O2+1.7O2

0.2O2+0.3O2

9.75

2,210

98.6

9.22

3.09

C-R 2.43

C-S 3.80

MC1 : , MC2 :

C-R 2.86
C-S 5.72

NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV).

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C
Indoor-Outdoor piping length : 5m

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

14

NOISE CRITERIA CURVES5

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,

Cooling : DB27: WB19:
Heating : DB20: WB -:

MSC-A07WV- E1

COOL

High

FUNCTIONFAN SPEED

36

HEAT

SPL(dB

(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions.

Cooling : DB27: WB19:
Heating : DB20: WB -:

MSC-A09WV- E1

COOL

High

FUNCTIONFAN SPEED

36

HEAT 39

SPL(dB

(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,

Cooling : DB27: WB19:

MSC-A12WV- E1

COOL

FUNCTIONFAN SPEED

40

HEAT

High

39

SPL(dB

(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,

Cooling : DB27: WB19:

MU-A07WV- E1
MU-A09WV- E1

COOL

FUNCTION

45

SPL(dB(A)) LINE

15

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,
Cooling :DB35: WB24:

Heating :DB 7: WB 6:

MUH-A09WV- E1
MUH-A12WV- E1

COOL

FUNCTION

49

HEAT

SPL(dB

(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions.

Cooling : DB27: WB19:

MUX-A10WV- E1

COOL

FUNCTION

49

SPL(dB(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,

Cooling :DB35: WB24:
Heating :DB 7: WB 6:

MUH-A07WV- E1

COOL

FUNCTION

47

HEAT

SPL(dB

(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,

Cooling :DB35: WB24:

MU-A12WV- E1

COOL

FUNCTION

49

SPL(dB(A)) LINE

16

MUX-A19WV - E1
MUX-A20WV - E1
MUX-A25WV - E1

FUNCTION

COOL

SPL(dB(A)) LINE

52

MUX-A26WV - E1

FUNCTION

COOL

SPL(dB(A)) LINE

52

Test conditions.

90

80

70

60

50

40

30

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

APPROXIMATE

20

TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

Cooling :DB35: WB24:

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

Test conditions.

90

80

70

60

50

40

30

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

APPROXIMATE

20

TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

Cooling :DB35: WB24:

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

17

6

OUTLINES AND DIMENSIONS

MSC-A07WV ­MSC-A09WV -

INDOOR UNIT

Unit: mm

E1

E1

Installation plate

81.5

133.5

4.5

783

815

278

60

58

162

Wireless remote controller

606

Indoor unit

19

41

81.5

Air in

149

Power supply cord
Lead to right 1.0m
Lead to left 0.3m

7 or more

30
Air out

215

217

326326

5

Installation plate

Liquid line
Gas line

{

Insulation

90
110

Drain hose
(Connected part O,D)

Insulation

231.5

42

2.5

81.5

Wall hole

[9.52-0.43m

[37 O.D

[16

[28

271

[65

[6.35-0.5m

[21 I.D

MSC-A12WV -

INDOOR UNIT

278

60

58

162

E1

783

815

606

161.5

Installation plate

Indoor unit

149

19

Power supply cord
Lead to right 1.0m
Lead to left 0.3m

41

Air in

7 or more

30

Air out

215

217

326326

5

Installation plate

90
110

161.5

17.5

258

218.5

42

2.5

81.581.5

Wall hole

Liquid line
Gas line

{

Insulation

Drain hose
(Connected part O,D)

Insulation

[65

[6.35-0.5m

[9.52-0.43m

[37 O.D

[21 I.D

[16

[28

Wireless remote controller

18

MU-A07WV - MUH-A07WV ­MU-A09WV - MUH-A09WV ­MU-A12WV - MUH-A12WV -

Unit: mm

E1E1

E1E1

E1E1

REQUIRED SPACE

OUTDOOR UNIT

320

32

109

Air in

Drainage
3holes [33

540

260

10

40

Air in

147

122

110

Air out

500
780

74

100mm or more

320

285

255

25

155

90

100mm or more

400mm or more

Service panel

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35

35-

43-

Gas refrigerant
pipe joint

104

Refrigerant pipe
(flared) [9.52 (MU-A07/A09WV

[12.7 (MU-A12WV
(MUH-A12WV

100mm or more

350mm or more

(MUH-A07/A09WV

)

)

)

)

19

320

25

10-

126

76

120

56

260

10

780

500

122

40

540

320

285

255

Service panel

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [9.52

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35

Air out

Air in

Air in

176

226

109

32

110

147

Drainage
3holes [33

100mm or more

100mm or more

100mm or more

350mm or more

REQUIRED SPACE

400mm or more

OUTDOOR UNIT

500

840 61

264

10°

10°

Service panel

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

Open as a rule
500mm or more if the back,
both sides and top are open

350mm or more

100mm or more

B UNIT
A UNIT

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {12.7

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35

65
80

121

40

438

Air in

Air out

Air in

273

100

125

320

30

330

640

360

76

505050

Drainage
3holes {33

}
}

34

Unit: mm

MUX-A10WV-

E1

MUX-A19WV-

E1

20

OUTDOOR UNIT

MUX-A20WV-

Drainage
3holes {33

34

125

Air in

100

320

E1

273

500

438

Air in

30

Air out

840 61

121

Unit: mm

Open as a rule
500mm or more if
the front and both
sides are open

100mm or more

100mm or more

330

360

Open as a rule
500mm or more if the back,

40

640

65

both sides and top are open

10°

10°

264

Service panel

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35

C UNIT

}

B UNIT

}

A UNIT

}

5050505050

76

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52

200mm or more if
there are obstacles
to both sides

350mm or more

MUX-A25WV-

Drainage
3holes {33

125
Air in

273

34

100

320

E1

500

438

Air in

30

330

40

Air out

840 61

121

640

80

100mm or more

360

Open as a rule
500mm or more if the back,
both sides and top are open

10°

10°

264

B UNIT

}

A UNIT

}

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

350mm or more

Service panel

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35

505050
76

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {12.7

21

SYMBOL

NR11

RT11

RT12

SR141

NAME

NAME NAME
INDOOR FAN CAPACITOR
FUSE(3.15A)
INDOOR FAN MOTOR (INNER FUSE)
VANE MOTOR

VARISTOR
ROOM TEMPERATURE THERMIST OR
INDOOR COIL THERMISTOR
SOLID STATE RELAY

TERMINAL BLOCK

SYMBOL

C11

F11

MF
MV

SYMBOL

TB

T11

TRANSFORMER

CIRCUIT BREAKER

SR141

C11

RED

WHT

3

6

5

BRN

YLW

GRY

BLK

4

3

2

1

MF

121

CN

1
3
5

111

CN

112

CN

RT12

RT11

NR11

F11

ELECTRONIC CONTROL P.C. BOARD

CN211

TAB12

CN201

3
2
1

CN202

2
1

151

CN

5

5

BRN
RED

BLU

WHT
BLK

BLU

BRN

TB

L
3
N
2
1

12V

TO OUTDOOR
UNIT
CONNECTING

POWER
SUPPLY
CORD
~/N 230V
50Hz

GRN/YLW

POWER MONITOR,
RECEIVER
P.C.BOARD

REMOTE
CONTROLLER

MV

FOR
MUH OR
MXZ TYPE

FOR
MU OR
MUX TYPE

12V

PE

101

CN

T11

GRN

LD103

OUTDOOR UNIT

330

850

E1

125

Air in

430

MUX-A26WV-

Drainage
3 holes

{33

100

273

438

Air in

Air out

121

Open as a rule
500mm or more if
the front and both
sides are open

40

34

30

500

840

100mm or more

360

Open as a rule

65

500mm or more if the back,

61

both sides and top are open

10°

10°

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52

80

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {12.7

260

Service panel

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35

D Unit

50
50

C Unit

5050

B Unit

50
50

A Unit

50

76

100mm or more
200mm or more if
there are obstacles
to both sides

350mm or more

Unit: mm

7

WIRING DIAGRAM

MSC-A07WV - MSC-A09WV - MSC-A12WV -

INDOOR UNIT

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

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

3. Symbols below indicate.

/: Terminal block, : Connector

MODELS WIRING DIAGRAM

22

E1E1E1

SYMBOL
TB1,TB2

21S4

52C

SYMBOL

MF
NR61
RT61

SR61,SR62

T61

SYMBOL

C1

C65

DSAR

F61

MC

NAME

NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
COMPRESSOR(INNER PROTECTOR)

OUTDOOR FAN MOTOR(INNER FUSE)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TRANSFORMER

TERMINAL BLOCK
R.V. COIL
COMPRESSOR CONTACTOR

MU-A07WV ­MU-A09WV ­MU-A12WV -

E1

E1

E1

OUTDOOR UNIT

FROM
INDOOR UNIT

CONNECTING

12V

POWER SUPPLY
~/N
230V 50Hz

MODELS WIRING DIAGRAM

TB2

2

WHT

1

BLK

CIRCUIT BREAKER

TB1

PE

L

BRN

N

BLU

GRN/YLW

NO

52C

52C

COM

BRN
WHT
WHT

C2

DSAR

C1

WHT
BLU
RED

RED
BLK

1
2
3

WHT

BLK

RED

C

MC

S

R

MF

SYMBOL

C1
C2

DSAR

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

COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER

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

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

MUH-A07WV ­MUH-A09WV ­MUH-A12WV -

NAME

SYMBOL

MC

MF

TB1,TB2

E1

E1

E1

MODELS WIRING DIAGRAM

NAME NAME
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER FUSE)
TERMINAL BLOCK

OUTDOOR UNIT

DSAR

TAB20

RT61

1
2
3

CN661

CN730

F61

T61

4

52C

3

C1

FROM
INDOOR UNIT
CONNECTING
12V

CIRCUIT BREAKER

POWER SUPPLY

~/N

50Hz

230V

PE

TB2

3

N

TB1

L

N

BLU

GRN/YLW

RED

BLK

BRN

BRN

BLU

SYMBOL

52C

R.V.coil

21S4

heating ON
cooling OFF

CN721

SR62

SR61

NR61

DEICER P.C.BOARD

RED

BLK

COMPRESSOR CONTACTOR

CN711

C65

WHT

MC

S

MF

WHT

1

BLK

2

RED

3

C

R

NOTE: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

23

MUX-A10WV -

E1

OUTDOOR UNIT

POWER SUPPLY

~ / N
230V
50Hz

CIRCUIT BREAKER

FROM INDOOR
UNIT No.A
CONNECTING

12V

FROM INDOOR
UNIT No.B
CONNECTING

12V

2

1

MODEL WIRING DIAGRAM

TB1

2
1

L

N

PE

TB2

WHT

X1

BLK
YLW

X2

ORN

7

8
7

8

BRN

BRN

DSAR

21R1

21R2

BLU

BLU

BLU

BLU

BLU

BLU

BLU

2
1

2
1

NO

BRN

2

BLU
BLU

BLU

BLU

52C

52C

1

2

TB3

F61

BLU

COM

BRN

BLU

WHT

5

6

5

6

X1

X1

X2

X2

F62

1

2

4

1

3
2
4

WHT

1

WHT

3

TB3

WHT

C2

C1

WHT
BLU
RED

RED

1

2
3

S

BLK

WHT

BLK

RED

C
MC

MF

R

BRN BRN BRN

WHT

BLU

BLU

2
1

BLU

21R

SYMBOL

C1
C2

DSAR

F61,F62

MC

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

COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
COMPRESSOR(INNER PROTECTOR)

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

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

NAME

SYMBOL

MF

TB1,TB2,TB3

X1
X2

21R

OUTDOOR FAN MOTOR(INNER FUSE)
TERMINAL BLOCK
RELAY(A)
RELAY(B)
SOLENOID COIL

NAME NAME

SYMBOL

21R1
21R2

52C

SOLENOID COIL(A)
SOLENOID COIL(B)
COMPRESSOR CONTACTOR

24

MUX-A19WV ­MUX-A25WV -

OUTDOOR UNIT

E1

E1

MODELS WIRING DIAGRAM

POWER SUPPLY
~/N

TB1

L

230V
50Hz

N

BRN

PE

CIRCUIT BREAKER

GRN/YLW

FROM INDOOR
UNIT A
CONNECTING

2
1

TB2

BLU
YLW

12V
FROM INDOOR

2

BLU

UNIT B
CONNECTING

1

ORN

12V

SYMBOL

C1
C2

C61

DSAR

F61

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

COMPRESSOR CAPACITOR(MC1)
COMPRESSOR CAPACITOR(MC2)
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)

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

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

NAME

BRN
BLU

TB4

2

1

DSAR

3
2
1

3
2
1

SYMBOL

BLU

CN71

CN73

CN91

MC1

MC2
MF61
NR61

SR861

BRN

123

CN90

OUTDOOR CONTROL
P.C. BOARD

F61

NR61

T61

SR861

52341

6

BLK

WHT

RED

MF61

COMPRESSOR(INNER PROTECTOR)
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
SURGE ABSORBER
OUTDOOR FAN RELAY

LD1

LD2

RED

RED

C61

NAME NAME

BRN

X522

BRN

X521

3

4

X521X522

SYMBOL

TB1

TB2~TB4

T61
X521
X522

C1

BLU

RED

S

MC1

BLK

BLU

R

C

WHT

3

4

C2

RED

S

MC2

RC

BLK

WHT

TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
COMPRESSOR CONTACTOR(MC1)
COMPRESSOR CONTACTOR(MC2)

25

1

2

3

1

2

3

123

213

123123123

21R421R3

NR61

T61

1

2

43

43

C61

LD1

WHT

WHT

OUTDOOR CONTROL P.C. BOARD

BRN

BLU

BRN

BLU

BRN

BLU

BLU

X522

X521

BLK

SR865

SR866

SR863

SR861

LD2

RED

RED

RED

BLK

WHT

652341

BRN
BLU

BLU

TB4

CN86

CN85

CN81

CN91

CN90

TB3

TB2

X521

BLU

BLU

X522

BLU

BLU

21RB

F61

CN74

CN73

CN71

FROM INDOOR

UNIT B

CONNECTING

12V

PE

CIRCUIT BREAKER

GRN/YLW

WHT

BLU

ORN

BLU

YLW

BLU

RED

RED

FROM INDOOR

UNIT A

CONNECTING

12V

1

2

1

2

C2

C1

RC

S

CR

S

MC2

FROM INDOOR

UNIT C

CONNECTING

12V

MF61

MC1

BLK

TB1

POWER SUPPLY

~/N

230V

50Hz

1

2

L

N

DSAR

BRN

MUX-A20WV -

E1

OUTDOOR UNIT

MODEL WIRING DIAGRAM

TERMINAL BLOCK

TRANSFORMER

COMPRESSOR CONTACTOR(MC1)

COMPRESSOR CONTACTOR(MC2)

SOLENOID COIL

SOLENOID COIL (B)

SOLENOID COIL (C)

T61

SYMBOL

TB2~TB4

NAME NAME

X521

X522

21R3

21RB

21R4

OUTDOOR FAN MOTOR(INNER PROTECTOR)

SURGE ABSORBER

OUTDOOR FAN RELAY

RELAY (21RB)

RELAY (C) (21R4)

RELAY (B) (21R3)

MF61

NR61

SYMBOL

SR861

SR863

SR865

SR866

TERMINAL BLOCK

TB1

NAME

COMPRESSOR CAPACITOR(MC1)

COMPRESSOR CAPACITOR(MC2)

C1

C2

SYMBOL

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

FUSE(3.15A)

COMPRESSOR(INNER PROTECTOR)

COMPRESSOR(INNER PROTECTOR)

F61

C61

DSAR

MC1

MC2

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

/: Terminal block, : Connector

3. Symbols below indicate.

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

26

MUX-A26WV -

E1

OUTDOOR UNIT

S

MC1

RC

C1

BLK

BLU

BRN

BLU

DSAR

BRN

X521

OUTDOOR CONTROL P.C. BOARD

CN90
13
2

BLU

GRN/YLW

BRN

TB4

BRN

2

BRN

RED

BLU

1

BLU

MODEL WIRING DIAGRAM

S

MC2

RC

BLK

T61

NR61

113

ORN

BLU

WHT

SR863

SR864

SR865

SR866

SR867

SR868

SR861

2

BRN

WHT

RED

C2

34

43

F61

BLU

X522 X521

2

3

X522

CN74CN73CN72CN71

2

3

1

WHT

BLU

BLU

21RB

BLU

123

BLU

21RA

BLU

123

BLU

21R4

123

BLU

BLU

21R3

123

BLU

BLU

21R2

BLU

BLU

123 123

BLU

RED

LD1

RED

LD2

621

RED

435

BLK

WHT

CN91

21R1

C61

MF61

CN83 CN84 CN85 CN86 CN81CN82

2

1

3

YLW

COMPRESSOR CONTACTOR(MC1)

COMPRESSOR CONTACTOR(MC2)

X521

X522

SYMBOL

NAME NAME

OUTDOOR FAN RELAY

RELAY (21RB)

SR861

SR863

SYMBOL

SOLENOID COIL (BALANCE)

SOLENOID COIL (BALANCE)

SOLENOID COIL (A)

21R1

21RA

21RB

RELAY (21RA)

RELAY (D) (21R4)

RELAY (C) (21R3)

RELAY (B) (21R2)

SR864

SR865

SR866

SOLENOID COIL (B)

SOLENOID COIL (C)

21R2

21R3

RELAY (A) (21R1)

SR867

SR868

SOLENOID COIL (D)

21R4

TERMINAL BLOCK

TRANSFORMER

T61

TB1~TB4

NAME

TB1

L

PE

112

CONNECTING

UNIT C

12V

TB3

CONNECTING

FROM INDOOR

UNIT B

12V

1

2

FROM INDOOR

CONNECTING

UNIT A

12V

CIRCUIT BREAKER

50Hz

TB2

2

FROM INDOOR

CONNECTING

UNIT D

1

12V

2

FROM INDOOR

N

~/N

230V

POWER SUPPLY

COMPRESSOR CAPACITOR(MC1)

COMPRESSOR CAPACITOR(MC2)

C1

C2

SYMBOL

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

FUSE(3.15A)

COMPRESSOR(INNER PROTECTOR)

COMPRESSOR(INNER PROTECTOR)

F61

C61

DSAR

MC1

MC2

OUTDOOR FAN MOTOR(INNER PROTECTOR)

SURGE ABSORBER

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

3. Symbols below indicate.

MF61

NR61

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

/: Terminal block, : Connector

27

8

REFRIGERANT SYSTEM DIAGRAM

MSC-A07WV ­MSC-A09WV -

Unit:mm

E1

E1

MU-A07WV ­MU-A09WV -

E1

E1

INDOOR UNIT

Indoor
heat
exchanger

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT12

Refrigerant pipe [9.52
(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [6.35
(with heat insulator)

OUTDOOR UNIT

Stop valve
(with service port)

Muffler

Outdoor
heat
exchanger

Compressor

Strainer

Capillary tube

[3.0x[1.4x500(MU-A07WV)
[3.0x[1.4x700(MU-A09WV)

Refrigerant flow in cooling

Unit:mm

MSC-A12WV -

INDOOR UNIT

Indoor
heat
exchanger

Room temperature
thermistor
RT11

E1

Indoor coil
thermistor

RT12

Refrigerant pipe [12.7
(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [6.35
(with heat insulator)

Stop valve
(with service port)

Stop valve

Compressor

Capillary tube
[3.0x[1.4x550

MU-A12WV -

OUTDOOR UNIT

Muffler

Outdoor
heat
exchanger

Strainer

Refrigerant flow in cooling

E1

28

MSC-A07WV ­MSC-A09WV -

INDOOR UNIT

Unit:mm

E1

E1

Refrigerant pipe [ 9.52

(with heat insulator)

4-way valve

MUH-A07WV ­MUH-A09WV -

OUTDOOR UNIT

E1

E1

Indoor
heat
exchanger

Indoor coil
thermistor
RT12

Room temperature
thermistor
RT11

MSC-A12WV -

Defrost
thermistor
RT61

Outdoor
heat
exchanger

Flared connection

Stop valve
(with service
port)

Muffler

Capillary tube
[3.0x[1.4x800(2 pcs)

(MUH-A07WV)
[3.0x[1.4x500(2 pcs)

(MUH-A09WV)

R.V. coil
heating ON
cooling OFF

Flared connection

Strainer

Stop valve

Compressor

Capillary tube

[3.0x[1.6x350(MUH-A07WV)
[3.0x[1.6x600(MUH-A09WV)

Check valve

Capillary tube
[3.0x[1.4x1050(MUH-A07WV)

Refrigerant pipe [6.35

(with heat insulator)

[3.0x[1.4x1300(MUH-A09WV)

Refrigerant flow in cooling
Refrigerant flow in heating

Unit:mm

E1

MUH-A12WV -

E1

INDOOR UNIT

Indoor
heat
exchanger

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT12

Refrigerant pipe [12.7

(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [6.35

(with heat insulator)

4-way valve

Stop valve
(with service port)

Strainer

Stop valve

Muffler

Compressor

Capillary tube
[3.0x[1.6x1350

Check
valve

Defrost
thermistor
RT61

OUTDOOR UNIT

Outdoor
heat
exchanger

Capillary tube
[3.0x[1.4x500(2pcs)

Capillary tube
[3.0x[1.6x400

R.V. coil
heating ON
cooling OFF

Refrigerant flow in cooling
Refrigerant flow in heating

29

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

Model

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

Model

Refrigerant piping

Max. length : m

A

20

25

Indoor unit

Gas 0.43

Liquid 0.5

Gas

9.52

12.7

Liquid

6.35

Outdoor unit

Gas 0

Liquid 0

MSC-A07WV - E1
MUH-A07WV - E1

MSC-A09WV - E1
MUH-A09WV - E1

MSC-A12WV - E1
MUH-A12WV - E1

{
{

{

Refrigerant piping

Max. length : m

A

20

25

Indoor unit

Gas 0.43

Liquid 0.5

Gas

9.52

12.7

Liquid

6.35

Outdoor unit

Gas 0

Liquid 0

MSC-A07WV - E1
MU-A07WV - E1

MSC-A09WV - E1
MU-A09WV - E1

MSC-A12WV - E1
MU-A12WV - E1

{
{

{

Indoor
unit

w Max. Height
difference 10m

Height difference should be within
10m regardless of which unit,
indoor or outdoor position is high.

Outdoor unit

Refrigerant Piping

Max.length

A

Model

Refrigerant piping length (one way)

Model

Refrigerant piping length (one way)

7m

0

10m

60

15m

160

20m

260

MSC-A07WV - E1
MUH-A07WV - E1

MSC-A09WV - E1
MUH-A09WV - E1

MSC-A12WV - E1
MUH-A12WV - E1

{

{

{

Calculation : Xg=20g/m 5 x(A-7)m

Outdoor unit precharged

750

800

830

25m

360

25m

360

7m

0

10m

60

15m

160

20m

260

MSC-A07WV - E1
MU-A07WV - E1

MSC-A09WV - E1
MU-A09WV - E1

MSC-A12WV - E1
MU-A12WV - E1

{
{

{

Calculation : Xg=20g/m x(A-7)m

Outdoor unit precharged

750

1100

1150

MAX. REFRIGERANT PIPING LENGTH

MAX. HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE(R410A : g)

30