Mitsubishi MUX-A22WV-E1 Service Manual

SERVICE MANUAL

HFC

utilized

R410A

SPLIT-TYPE, AIR CONDITIONER

Multi system type
Model

Revision A:

●MUX-A22WV - can be connected to
MSC-A07/A12YV -

●PARTS LIST has partially modified.

Please void OB318.

E1

E1

.

No. OB318

REVISED EDITION-A

MUX-A22WV -

MUX-A22WV -

Indication of
model name

NOTE:

•This manual describes technical data of outdoor unit.

•As for indoor unit MSC-A07WV - or MSC-A12WV - ,
refer to the service manual OB307 REVISED EDITION-C.

•As for indoor unit MSC-A07YV - or MSC-A12YV - ,
refer to the service manual OB329.

E1

E1E1

E1E1

E1

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················4

3. INDOOR / OUTDOOR
CORRESPONDENCE TABLE ···························5

4. SPECIFICATION·················································5

5. NOISE CRITERIA CURVES·······························6

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

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

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

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

10. MICROPROCESSOR CONTROL ····················15

11. TROUBLESHOOTING ······································15

12. DISASSEMBLY INSTRUCTIONS·····················21

13. PARTS LIST······················································23

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

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

Revision A:

E1E1

•MUX-A22WV - can be connected to MSC-A07/A12YV -

•Parts No. has been changed due to the color change of outdoor unit parts.
WHITE➔NEW WHITE (Brighter)

.

1

TECHNICAL CHANGES

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.

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])

2

Conversion chart of refrigerant temperature and pressure

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

(MPa [Gauge])

4.0

3.5

3.0

2.5

2.0

1.5

R410A
R22

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

international system of units(SI unit system).

1.0

0.5

Saturated liquid pressure

0.0

-0.5

-30 -20 -10 0 10 20

30

40 50 60

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.

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”.

3

Pipe diameter

Air outlet

Drain outlet

Air inlet

Piping

Drainage hose

(Back and side)

Dimension of flare nut

mm

6.35

9.52

12.7

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

2

PART NAMES AND FUNCTIONS

OUTDOOR UNIT

MUX-A22WV-

E1

Gauge manifold
valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder
for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging

4

MUX-A22WV- 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

C:

INDOOR / OUTDOOR CORRESPONDENCE TABLE3

MUX-A22WV -

4

Capacity

Electrical

Coefficient of performance (C.O.P)

Compressor

Fan

Special

SPECIFICATION

Outdoor unit power supply

Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor

data

Starting current
Compressor motor current
Fan motor current

Model
Output
Winding
resistance (at 20:)
Model
Winding

motor

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

remarks

capacity (R410A)
Refrigerating oil (Model)

E1

Outdoor model

Function

Indoor unit No

E1

MUX-A22WV -

Cooling

Single phase

230V,50Hz

.

kW

R/h

K /h

A
A

W

A(kW)

%

A
A
A

W

"

"

mm

kg
dB

rpm

kg
cc

Single

A

3.5

1.4

5.73

1,280

97.1

5.02

2.65

Single
B or C

2.4

0.9

3.64
815

97.3

2.99

2.82

MC1 : RN145VHSHT, MC2 : RN092VHSHT

MC1 : 1,000, MC2 : 600

MC1 : , MC2 :

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

Double

A+B or A+C

3.5+2.4

1.4+0.9
2,460

20

8.92

1,975

—

96.3
48

8.01

0.57

2.88

C-R 2.43
C-S 3.80

RA6V60-GA

WHT-BLK 90
BLK-RED 146
840O640O330

67
52

730

1

0.85 (Room A)

0.85 (Room B+C)

Double

1.45O2

C-R 3.87
C-S 0.14

B+C

0.4

3.69
830

97.8

2.99

3.22

Triple

A+B+C

3.4+1.45O2

1.4+0.4

8.84

1,980

97.4

8.01

3.01

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB24°C
Indoor-Outdoor piping length 5m
w Reference value

5

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 :DB35: WB24:

COOL

FUNCTION

52

SPL(dB(A)) LINE

MUX-A22WV - E1

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)

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35

65

121

40

438

Air in

Air out

Air in

273

100

125

320

30

330

640

360

76

5050505050

Drainage
3holes {33

}

C UNIT

}
}

34

C or B unit {9.52
A unit {12.7

6

MUX-A22WV-

OUTLINES AND DIMENSIONS

E1

OUTDOOR UNIT

Unit: mm

6

7

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

TO INDOOR

UNIT B

CONNECTING

12V

PE

CIRCUIT BREAKER

GRN/YLW

WHT

BLU

ORN

BLU

YLW

BLU

RED

RED

TO INDOOR

UNIT A

CONNECTING

12V

1

2

1

2

C2

C1

RC

S

CR

S

MC2

TO INDOOR

UNIT C

CONNECTING

12V

MF61

MC1

BLK

TB1

POWER SUPPLY

~/N

230V

50Hz

1

2

L

N

DSAR

BRN

WIRING DIAGRAM

MUX-A22WV -

OUTDOOR UNIT

E1

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

SR861

SYMBOL

NAME

COMPRESSOR CAPACITOR(MC1)

C1

SYMBOL

SR863

COMPRESSOR CAPACITOR(MC2)

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

C2

C61

DSAR

TERMINAL BLOCK

TB1

SR865

SR866

FUSE(3.15A)

COMPRESSOR(INNER PROTECTOR)

COMPRESSOR(INNER PROTECTOR)

F61

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.

7

OUTDOOR UNIT

INDOOR UNIT

UNIT A

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

UNIT B

Indoor

heat

exchanger

Outdoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

(With insulation)

Refrigerant pipe

12.7

(With insulation)

Refrigerant pipe

9.52

(With insulation)

Refrigerant pipe

6.35

Flared connection

(With insulation)

Refrigerant pipe

6.35

Flared connection

Refrigerant pipe

9.52

(With insulation)

Refrigerant pipe

6.35

Flared connection

Stop valve
with service port

Stop valve

Solenoid valve
21R3

Solenoid valve
21R4

Solenoid
valve
21RB

Stop valve
with
service port

Stop valve
with
service port

Capillary tube CT1

Capillary tube CT3

Capillary tube CT4

Capillary tube CT2

Capillary tube CT5

Compressor(A)

Compressor(B,C)

Refrigerant flow in cooling

UNIT C

Indoor

heat

exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

Stop
valve

Stop
valve

Strainer
#100

Muffler

Muffler

[3.0 x [1.6 x 900

[3.0 x [1.4 x 1000

[3.0 x [1.6 x 900

[3.0 x [1.6 x700

[3.0 x [1.6 x 900

Strainer
#100

Strainer
#100

8

LA

Indoor unit A

HL

B HLC

H

Indoor unit B

Indoor unit C

Outdoor unit

MUX-A22WV -

E1

REFRIGERANT SYSTEM DIAGRAM

Unit : mm

MUX-A22WV-

E1

MUX-A22WV-

MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

E1

8

UNIT No.

Pipe length

Height difference (H)

No. of bends

Max.
limits

Unit A
Unit B
Unit C

L
LB
LC

A

15m
15m

15m

B

L

+

LC

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

Refrigerant piping length (one way)

9m

40

Refrigerant piping length (one way, 2 unit total)

Unit A

Unit B + Unit C

Outdoor unit

precharged

850g

Outdoor unit

precharged

850g

7m

0

10m11m12m13m14m15m16m17m18m19m20m21m22m23m24m25m26m27m28m29m30

0 102030405060

8m

20

PIPING PREPARATION

1Table below shows the specifications of pipes commercially available.

UNIT No.

Unit A

Unit B and Unit C

Pipe

For liquid

For gas

For liquid

For gas

Outside diameter

mm

6.35

12.7

6.35

9.52

10m

Total
30m

10m

60

70 80 90 100 110 120 130 140 150 160 170 180 190 200

11m

80

Insulation
thickness

8mm
8mm
8mm
8mm

10m
10m

12m

100

13m

120

Insulation material

Heat resisting foam plastic

0.045 specific gravity

10
10

14m

140

10

Total

15

15m

160

m

2Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3Refrigerant bending radius must be 100mm or more.

9

MUX-A22WV -

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

PERFORMANCE CURVES

E1

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

Indoor air wet/dry-bulb temperature difference on the left side of the chart on page 10 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.

9

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

Single operation (Unit B or C)

Outdoor unit current (A)

2.0

2.5

3.0

3.5

4.0

230V

230V

1.3

1.1

1.0

0.9

0.8

0.7

Outdoor low pressure (kgf/F[Gauge])

11

10

9

8

7

13

1.2

12

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

Ambient temperature(˚C)

Ambient humidity(%)

20
50

2560 30

70

(˚C)

(%)

Ambient temperature(˚C)

Ambient humidity(%)

20
50

2560 30

70

(˚C)

(%)

1.2

1.0

0.9

0.8

0.7

0.6

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

Outdoor low pressure (kgf/F[Gauge])

10

9

8

7

6

12

1.1

11

Outdoor unit current (A)

Single operation (Unit A)

4.0

5.0

6.0

7.0

230V

230V

Ambient temperature(˚C)

Ambient humidity(%)

20
50

2560 30

70

(˚C)

(%)

Ambient temperature(˚C)

Ambient humidity(%)

20
50

2560 30

70

(˚C)

(%)

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

Wet-and dry-bulb
thermometers

9-1.CAPACITY AND THE INPUT CURVES

(ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)

9.4

10.2

8.6

9.4

7.8

8.5

7.1

7.7

6.3

6.9

5.6

6.1

Indoor air WB temperature

difference (deg.)

OUTDOOR UNIT

Wet-and dry-bulb
thermometers

(Indoor unit A)

MUX-A22WV- E1

MUX-A22WV- E1

(Indoor unit B or C)

9-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

COOL operation

① Both indoor and outdoor unit are under

same temperature/humidity condition.

➁ Air flow should be set at MAX.
③ The unit of pressure has been changed to MPa on

the international system of units(SI unit system).
The conversion factor is : 1(MPa[Gauge]) =10.2(kgf/ff[Gauge] )

MUX-A22WV-

E1

Dry-bulb temperature Relative humidity (%)

20
25
30

10

50
60
70

PERFORMANCE DATA

21 18 4.11 2.25 0.55 1056 3.94 2.15 0.55 1109 3.78 2.07 0.55 1162 3.64 1.99 0.55 1214
21 20 4.29 1.83 0.43 1109 4.11 1.76 0.43 1175 3.99 1.70 0.43 1201 3.85 1.64 0.43 1254
22 18 4.11 2.41 0.59 1056 3.94 2.31 0.59 1109 3.78 2.22 0.59 1162 3.64 2.14 0.59 1214
22 20 4.29 2.00 0.47 1109 4.11 1.92 0.47 1175 3.99 1.86 0.47 1201 3.85 1.80 0.47 1254
22 22 4.46 1.55 0.35 1148 4.31 1.49 0.35 1221 4.20 1.46 0.35 1254 4.03 1.40 0.35 1307
23 18 4.11 2.58 0.63 1056 3.94 2.47 0.63 1109 3.78 2.37 0.63 1162 3.64 2.28 0.63 1214
23 20 4.29 2.17 0.51 1109 4.11 2.09 0.51 1175 3.99 2.02 0.51 1201 3.85 1.95 0.51 1254
23 22 4.46 1.73 0.39 1148 4.31 1.67 0.39 1221 4.20 1.63 0.39 1254 4.03 1.56 0.39 1307
24 18 4.11 2.74 0.67 1056 3.94 2.63 0.67 1109 3.78 2.52 0.67 1162 3.64 2.43 0.67 1214
24 20 4.29 2.35 0.55 1109 4.11 2.25 0.55 1175 3.99 2.18 0.55 1201 3.85 2.11 0.55 1254
24 22 4.46 1.91 0.43 1148 4.31 1.84 0.43 1221 4.20 1.79 0.43 1254 4.03 1.72 0.43 1307
24 24 4.69 1.44 0.31 1201 4.52 1.39 0.31 1267 4.41 1.35 0.31 1307 4.27 1.31 0.31 1373
25 18 4.11 2.91 0.71 1056 3.94 2.78 0.71 1109 3.78 2.67 0.71 1162 3.64 2.57 0.71 1214
25 20 4.29 2.52 0.59 1109 4.11 2.41 0.59 1175 3.99 2.34 0.59 1201 3.85 2.26 0.59 1254
25 22 4.46 2.08 0.47 1148 4.31 2.01 0.47 1221 4.20 1.96 0.47 1254 4.03 1.88 0.47 1307
25 24 4.69 1.63 0.35 1201 4.52 1.57 0.35 1267 4.41 1.53 0.35 1307 4.27 1.48 0.35 1373
26 18 4.11 3.07 0.75 1056 3.94 2.94 0.75 1109 3.78 2.82 0.75 1162 3.64 2.72 0.75 1214
26 20 4.29 2.69 0.63 1109 4.11 2.58 0.63 1175 3.99 2.50 0.63 1201 3.85 2.41 0.63 1254
26 22 4.46 2.26 0.51 1148 4.31 2.18 0.51 1221 4.20 2.13 0.51 1254 4.03 2.04 0.51 1307
26 24 4.69 1.82 0.39 1201 4.52 1.75 0.39 1267 4.41 1.71 0.39 1307 4.27 1.65 0.39 1373
26 26 4.83 1.29 0.27 1267 4.69 1.25 0.27 1333 4.62 1.23 0.27 1373 4.48 1.20 0.27 1412
27 18 4.11 3.24 0.79 1056 3.94 3.10 0.79 1109 3.78 2.97 0.79 1162 3.64 2.86 0.79 1214
27 20 4.29 2.86 0.67 1109 4.11 2.74 0.67 1175 3.99 2.66 0.67 1201 3.85 2.57 0.67 1254
27 22 4.46 2.44 0.55 1148 4.31 2.35 0.55 1221 4.20 2.30 0.55 1254 4.03 2.20 0.55 1307
27 24 4.69 2.00 0.43 1201 4.52 1.93 0.43 1267 4.41 1.88 0.43 1307 4.27 1.82 0.43 1373
27 26 4.83 1.48 0.31 1267 4.69 1.44 0.31 1333 4.62 1.42 0.31 1373 4.48 1.38 0.31 1412
28 18 4.11 3.40 0.83 1056 3.94 3.26 0.83 1109 3.78 3.13 0.83 1162 3.64 3.01 0.83 1214
28 20 4.29 3.03 0.71 1109 4.11 2.91 0.71 1175 3.99 2.82 0.71 1201 3.85 2.72 0.71 1254
28 22 4.46 2.62 0.59 1148 4.31 2.53 0.59 1221 4.20 2.47 0.59 1254 4.03 2.36 0.59 1307
28 24 4.69 2.19 0.47 1201 4.52 2.11 0.47 1267 4.41 2.06 0.47 1307 4.27 1.99 0.47 1373
28 26 4.83 1.68 0.35 1267 4.69 1.63 0.35 1333 4.62 1.60 0.35 1373 4.48 1.55 0.35 1412
29 18 4.11 3.57 0.87 1056 3.94 3.41 0.87 1109 3.78 3.28 0.87 1162 3.64 3.16 0.87 1214
29 20 4.29 3.20 0.75 1109 4.11 3.07 0.75 1175 3.99 2.98 0.75 1201 3.85 2.88 0.75 1254
29 22 4.46 2.80 0.63 1148 4.31 2.70 0.63 1221 4.20 2.63 0.63 1254 4.03 2.52 0.63 1307
29 24 4.69 2.38 0.51 1201 4.52 2.29 0.51 1267 4.41 2.24 0.51 1307 4.27 2.16 0.51 1373
29 26 4.83 1.87 0.39 1267 4.69 1.82 0.39 1333 4.62 1.79 0.39 1373 4.48 1.73 0.39 1412
30 18 4.11 3.73 0.91 1056 3.94 3.57 0.91 1109 3.78 3.43 0.91 1162 3.64 3.30 0.91 1214
30 20 4.29 3.37 0.79 1109 4.11 3.24 0.79 1175 3.99 3.14 0.79 1201 3.85 3.03 0.79 1254
30 22 4.46 2.98 0.67 1148 4.31 2.87 0.67 1221 4.20 2.80 0.67 1254 4.03 2.68 0.67 1307
30 24 4.69 2.57 0.55 1201 4.52 2.47 0.55 1267 4.41 2.41 0.55 1307 4.27 2.34 0.55 1373
30 26 4.83 2.06 0.43 1267 4.69 2.00 0.43 1333 4.62 1.97 0.43 1373 4.48 1.91 0.43 1412
31 18 4.11 3.89 0.95 1056 3.94 3.73 0.95 1109 3.78 3.58 0.95 1162 3.64 3.45 0.95 1214
31 20 4.29 3.55 0.83 1109 4.11 3.40 0.83 1175 3.99 3.30 0.83 1201 3.85 3.18 0.83 1254
31 22 4.46 3.15 0.71 1148 4.31 3.04 0.71 1221 4.20 2.97 0.71 1254 4.03 2.85 0.71 1307
31 24 4.69 2.75 0.59 1201 4.52 2.65 0.59 1267 4.41 2.59 0.59 1307 4.27 2.51 0.59 1373
31 26 4.83 2.26 0.47 1267 4.69 2.19 0.47 1333 4.62 2.16 0.47 1373 4.48 2.09 0.47 1412
32 18 4.11 4.06 0.99 1056 3.94 3.89 0.99 1109 3.78 3.73 0.99 1162 3.64 3.59 0.99 1214
32 20 4.29 3.72 0.87 1109 4.11 3.57 0.87 1175 3.99 3.46 0.87 1201 3.85 3.34 0.87 1254
32 22 4.46 3.33 0.75 1148 4.31 3.22 0.75 1221 4.20 3.14 0.75 1254 4.03 3.01 0.75 1307
32 24 4.69 2.94 0.63 1201 4.52 2.83 0.63 1267 4.41 2.77 0.63 1307 4.27 2.68 0.63 1373
32 26 4.83 2.45 0.51 1267 4.69 2.38 0.51 1333 4.62 2.34 0.51 1373 4.48 2.27 0.51 1412

CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1320(W)

OUTDOOR DB(:)

INDOOR

INDOOR

25 27 30

DB(:)

WB(:)

Q

SHC

SHF

INPUT

Q

SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21

COOL operation (230V)

MSC-A12WV - MSC-A12YV - (Single : Room A) : MUX-A22WV -

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

11

E1E1E1

PERFORMANCE DATA

21 18 3.43 1.88 0.55 1294 3.15 1.72 0.55 1373 3.03 1.66 0.55 1399
21 20 3.61 1.54 0.43 1346 3.36 1.43 0.43 1412 3.24 1.38 0.43 1452
22 18 3.43 2.01 0.59 1294 3.15 1.85 0.59 1373 3.03 1.78 0.59 1399
22 20 3.61 1.68 0.47 1346 3.36 1.57 0.47 1412 3.24 1.51 0.47 1452
22 22 3.82 1.32 0.35 1399 3.57 1.24 0.35 1478 3.45 1.20 0.35 1505
23 18 3.43 2.15 0.63 1294 3.15 1.98 0.63 1373 3.03 1.90 0.63 1399
23 20 3.61 1.83 0.51 1346 3.36 1.70 0.51 1412 3.24 1.64 0.51 1452
23 22 3.82 1.48 0.39 1399 3.57 1.38 0.39 1478 3.45 1.33 0.39 1505
24 18 3.43 2.29 0.67 1294 3.15 2.10 0.67 1373 3.03 2.02 0.67 1399
24 20 3.61 1.97 0.55 1346 3.36 1.84 0.55 1412 3.24 1.77 0.55 1452
24 22 3.82 1.63 0.43 1399 3.57 1.52 0.43 1478 3.45 1.47 0.43 1505
24 24 4.03 1.24 0.31 1452 3.78 1.16 0.31 1518 3.68 1.13 0.31 1551
25 18 3.43 2.43 0.71 1294 3.15 2.23 0.71 1373 3.03 2.14 0.71 1399
25 20 3.61 2.12 0.59 1346 3.36 1.97 0.59 1412 3.24 1.90 0.59 1452
25 22 3.82 1.78 0.47 1399 3.57 1.67 0.47 1478 3.45 1.61 0.47 1505
25 24 4.03 1.40 0.35 1452 3.78 1.31 0.35 1518 3.68 1.28 0.35 1551
26 18 3.43 2.56 0.75 1294 3.15 2.35 0.75 1373 3.03 2.26 0.75 1399
26 20 3.61 2.26 0.63 1346 3.36 2.11 0.63 1412 3.24 2.03 0.63 1452
26 22 3.82 1.93 0.51 1399 3.57 1.81 0.51 1478 3.45 1.75 0.51 1505
26 24 4.03 1.56 0.39 1452 3.78 1.46 0.39 1518 3.68 1.42 0.39 1551
26 26 4.24 1.13 0.27 1505 3.99 1.07 0.27 1571 3.87 1.03 0.27 1604
27 18 3.43 2.70 0.79 1294 3.15 2.48 0.79 1373 3.03 2.38 0.79 1399
27 20 3.61 2.40 0.67 1346 3.36 2.24 0.67 1412 3.24 2.16 0.67 1452
27 22 3.82 2.09 0.55 1399 3.57 1.95 0.55 1478 3.45 1.89 0.55 1505
27 24 4.03 1.72 0.43 1452 3.78 1.61 0.43 1518 3.68 1.57 0.43 1551
27 26 4.24 1.30 0.31 1505 3.99 1.22 0.31 1571 3.87 1.19 0.31 1604
28 18 3.43 2.84 0.83 1294 3.15 2.61 0.83 1373 3.03 2.50 0.83 1399
28 20 3.61 2.55 0.71 1346 3.36 2.38 0.71 1412 3.24 2.29 0.71 1452
28 22 3.82 2.24 0.59 1399 3.57 2.10 0.59 1478 3.45 2.02 0.59 1505
28 24 4.03 1.88 0.47 1452 3.78 1.77 0.47 1518 3.68 1.72 0.47 1551
28 26 4.24 1.47 0.35 1505 3.99 1.38 0.35 1571 3.87 1.34 0.35 1604
29 18 3.43 2.97 0.87 1294 3.15 2.73 0.87 1373 3.03 2.62 0.87 1399
29 20 3.61 2.69 0.75 1346 3.36 2.51 0.75 1412 3.24 2.42 0.75 1452
29 22 3.82 2.39 0.63 1399 3.57 2.24 0.63 1478 3.45 2.16 0.63 1505
29 24 4.03 2.04 0.51 1452 3.78 1.92 0.51 1518 3.68 1.86 0.51 1551
29 26 4.24 1.64 0.39 1505 3.99 1.54 0.39 1571 3.87 1.50 0.39 1604
30 18 3.43 3.11 0.91 1294 3.15 2.86 0.91 1373 3.03 2.75 0.91 1399
30 20 3.61 2.84 0.79 1346 3.36 2.64 0.79 1412 3.24 2.55 0.79 1452
30 22 3.82 2.54 0.67 1399 3.57 2.38 0.67 1478 3.45 2.30 0.67 1505
30 24 4.03 2.20 0.55 1452 3.78 2.07 0.55 1518 3.68 2.01 0.55 1551
30 26 4.24 1.81 0.43 1505 3.99 1.70 0.43 1571 3.87 1.65 0.43 1604
31 18 3.43 3.25 0.95 1294 3.15 2.98 0.95 1373 3.03 2.87 0.95 1399
31 20 3.61 2.98 0.83 1346 3.36 2.78 0.83 1412 3.24 2.68 0.83 1452
31 22 3.82 2.70 0.71 1399 3.57 2.52 0.71 1478 3.45 2.44 0.71 1505
31 24 4.03 2.36 0.59 1452 3.78 2.22 0.59 1518 3.68 2.16 0.59 1551
31 26 4.24 1.98 0.47 1505 3.99 1.86 0.47 1571 3.87 1.81 0.47 1604
32 18 3.43 3.39 0.99 1294 3.15 3.11 0.99 1373 3.03 2.99 0.99 1399
32 20 3.61 3.13 0.87 1346 3.36 2.91 0.87 1412 3.24 2.81 0.87 1452
32 22 3.82 2.85 0.75 1399 3.57 2.67 0.75 1478 3.45 2.58 0.75 1505
32 24 4.03 2.52 0.63 1452 3.78 2.37 0.63 1518 3.68 2.30 0.63 1551
32 26 4.24 2.15 0.51 1505 3.99 2.02 0.51 1571 3.87 1.96 0.51 1604

CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1320(W)

OUTDOOR DB(:)

INDOOR

INDOOR

DB(:)

WB(:)

Q

SHC

SHF

INPUT

Q

SHC SHF INPUT Q SHC SHF INPUT

35 40 43

COOL operation (230V)

MSC-A12WV - MSC-A12YV - (Single : Room A) : MUX-A22WV -

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

12

E1E1E1

PERFORMANCE DATA

21 18 2.82 1.58 0.56 680 2.70 1.51 0.56 714 2.59 1.45 0.56 748 2.50 1.40 0.56 782
21 20 2.94 1.29 0.44 714 2.82 1.24 0.44 757 2.74 1.20 0.44 774 2.64 1.16 0.44 808
22 18 2.82 1.69 0.60 680 2.70 1.62 0.60 714 2.59 1.56 0.60 748 2.50 1.50 0.60 782
22 20 2.94 1.41 0.48 714 2.82 1.35 0.48 757 2.74 1.31 0.48 774 2.64 1.27 0.48 808
22 22 3.06 1.10 0.36 740 2.95 1.06 0.36 786 2.88 1.04 0.36 808 2.76 0.99 0.36 842
23 18 2.82 1.80 0.64 680 2.70 1.73 0.64 714 2.59 1.66 0.64 748 2.50 1.60 0.64 782
23 20 2.94 1.53 0.52 714 2.82 1.47 0.52 757 2.74 1.42 0.52 774 2.64 1.37 0.52 808
23 22 3.06 1.22 0.40 740 2.95 1.18 0.40 786 2.88 1.15 0.40 808 2.76 1.10 0.40 842
24 18 2.82 1.92 0.68 680 2.70 1.84 0.68 714 2.59 1.76 0.68 748 2.50 1.70 0.68 782
24 20 2.94 1.65 0.56 714 2.82 1.58 0.56 757 2.74 1.53 0.56 774 2.64 1.48 0.56 808
24 22 3.06 1.35 0.44 740 2.95 1.30 0.44 786 2.88 1.27 0.44 808 2.76 1.21 0.44 842
24 24 3.22 1.03 0.32 774 3.10 0.99 0.32 816 3.02 0.97 0.32 842 2.93 0.94 0.32 884
25 18 2.82 2.03 0.72 680 2.70 1.94 0.72 714 2.59 1.87 0.72 748 2.50 1.80 0.72 782
25 20 2.94 1.76 0.60 714 2.82 1.69 0.60 757 2.74 1.64 0.60 774 2.64 1.58 0.60 808
25 22 3.06 1.47 0.48 740 2.95 1.42 0.48 786 2.88 1.38 0.48 808 2.76 1.32 0.48 842
25 24 3.22 1.16 0.36 774 3.10 1.11 0.36 816 3.02 1.09 0.36 842 2.93 1.05 0.36 884
26 18 2.82 2.14 0.76 680 2.70 2.05 0.76 714 2.59 1.97 0.76 748 2.50 1.90 0.76 782
26 20 2.94 1.88 0.64 714 2.82 1.80 0.64 757 2.74 1.75 0.64 774 2.64 1.69 0.64 808
26 22 3.06 1.59 0.52 740 2.95 1.54 0.52 786 2.88 1.50 0.52 808 2.76 1.44 0.52 842
26 24 3.22 1.29 0.40 774 3.10 1.24 0.40 816 3.02 1.21 0.40 842 2.93 1.17 0.40 884
26 26 3.31 0.93 0.28 816 3.22 0.90 0.28 859 3.17 0.89 0.28 884 3.07 0.86 0.28 910
27 18 2.82 2.26 0.80 680 2.70 2.16 0.80 714 2.59 2.07 0.80 748 2.50 2.00 0.80 782
27 20 2.94 2.00 0.68 714 2.82 1.92 0.68 757 2.74 1.86 0.68 774 2.64 1.80 0.68 808
27 22 3.06 1.71 0.56 740 2.95 1.65 0.56 786 2.88 1.61 0.56 808 2.76 1.55 0.56 842
27 24 3.22 1.42 0.44 774 3.10 1.36 0.44 816 3.02 1.33 0.44 842 2.93 1.29 0.44 884
27 26 3.31 1.06 0.32 816 3.22 1.03 0.32 859 3.17 1.01 0.32 884 3.07 0.98 0.32 910
28 18 2.82 2.37 0.84 680 2.70 2.27 0.84 714 2.59 2.18 0.84 748 2.50 2.10 0.84 782
28 20 2.94 2.12 0.72 714 2.82 2.03 0.72 757 2.74 1.97 0.72 774 2.64 1.90 0.72 808
28 22 3.06 1.84 0.60 740 2.95 1.77 0.60 786 2.88 1.73 0.60 808 2.76 1.66 0.60 842
28 24 3.22 1.54 0.48 774 3.10 1.49 0.48 816 3.02 1.45 0.48 842 2.93 1.41 0.48 884
28 26 3.31 1.19 0.36 816 3.22 1.16 0.36 859 3.17 1.14 0.36 884 3.07 1.11 0.36 910
29 18 2.82 2.48 0.88 680 2.70 2.38 0.88 714 2.59 2.28 0.88 748 2.50 2.20 0.88 782
29 20 2.94 2.23 0.76 714 2.82 2.14 0.76 757 2.74 2.08 0.76 774 2.64 2.01 0.76 808
29 22 3.06 1.96 0.64 740 2.95 1.89 0.64 786 2.88 1.84 0.64 808 2.76 1.77 0.64 842
29 24 3.22 1.67 0.52 774 3.10 1.61 0.52 816 3.02 1.57 0.52 842 2.93 1.52 0.52 884
29 26 3.31 1.32 0.40 816 3.22 1.29 0.40 859 3.17 1.27 0.40 884 3.07 1.23 0.40 910
30 18 2.82 2.59 0.92 680 2.70 2.48 0.92 714 2.59 2.38 0.92 748 2.50 2.30 0.92 782
30 20 2.94 2.35 0.80 714 2.82 2.26 0.80 757 2.74 2.19 0.80 774 2.64 2.11 0.80 808
30 22 3.06 2.08 0.68 740 2.95 2.01 0.68 786 2.88 1.96 0.68 808 2.76 1.88 0.68 842
30 24 3.22 1.80 0.56 774 3.10 1.73 0.56 816 3.02 1.69 0.56 842 2.93 1.64 0.56 884
30 26 3.31 1.46 0.44 816 3.22 1.42 0.44 859 3.17 1.39 0.44 884 3.07 1.35 0.44 910
31 18 2.82 2.71 0.96 680 2.70 2.59 0.96 714 2.59 2.49 0.96 748 2.50 2.40 0.96 782
31 20 2.94 2.47 0.84 714 2.82 2.37 0.84 757 2.74 2.30 0.84 774 2.64 2.22 0.84 808
31 22 3.06 2.20 0.72 740 2.95 2.13 0.72 786 2.88 2.07 0.72 808 2.76 1.99 0.72 842
31 24 3.22 1.93 0.60 774 3.10 1.86 0.60 816 3.02 1.81 0.60 842 2.93 1.76 0.60 884
31 26 3.31 1.59 0.48 816 3.22 1.54 0.48 859 3.17 1.52 0.48 884 3.07 1.47 0.48 910
32 18 2.82 2.82 1.00 680 2.70 2.70 1.00 714 2.59 2.59 1.00 748 2.50 2.50 1.00 782
32 20 2.94 2.59 0.88 714 2.82 2.48 0.88 757 2.74 2.41 0.88 774 2.64 2.32 0.88 808
32 22 3.06 2.33 0.76 740 2.95 2.24 0.76 786 2.88 2.19 0.76 808 2.76 2.10 0.76 842
32 24 3.22 2.06 0.64 774 3.10 1.98 0.64 816 3.02 1.94 0.64 842 2.93 1.87 0.64 884
32 26 3.31 1.72 0.52 816 3.22 1.67 0.52 859 3.17 1.65 0.52 884 3.07 1.60 0.52 910

CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 850(W)

OUTDOOR DB(:)

INDOOR

INDOOR

25 27 30

DB(:)

WB(:)

Q

SHC

SHF

INPUT

Q

SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21

COOL operation (230V)

MSC-A07WV - MSC-A07YV - (Single : Room B or C) : MUX-A22WV -

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

13

E1E1E1

PERFORMANCE DATA

21 18 2.35 1.32 0.56 833 2.16 1.21 0.56 884 2.08 1.16 0.56 901
21 20 2.47 1.09 0.44 867 2.30 1.01 0.44 910 2.22 0.98 0.44 935
22 18 2.35 1.41 0.60 833 2.16 1.30 0.60 884 2.08 1.25 0.60 901
22 20 2.47 1.19 0.48 867 2.30 1.11 0.48 910 2.22 1.07 0.48 935
22 22 2.62 0.94 0.36 901 2.45 0.88 0.36 952 2.36 0.85 0.36 969
23 18 2.35 1.51 0.64 833 2.16 1.38 0.64 884 2.08 1.33 0.64 901
23 20 2.47 1.29 0.52 867 2.30 1.20 0.52 910 2.22 1.15 0.52 935
23 22 2.62 1.05 0.40 901 2.45 0.98 0.40 952 2.36 0.95 0.40 969
24 18 2.35 1.60 0.68 833 2.16 1.47 0.68 884 2.08 1.41 0.68 901
24 20 2.47 1.38 0.56 867 2.30 1.29 0.56 910 2.22 1.24 0.56 935
24 22 2.62 1.15 0.44 901 2.45 1.08 0.44 952 2.36 1.04 0.44 969
24 24 2.76 0.88 0.32 935 2.59 0.83 0.32 978 2.52 0.81 0.32 999
25 18 2.35 1.69 0.72 833 2.16 1.56 0.72 884 2.08 1.49 0.72 901
25 20 2.47 1.48 0.60 867 2.30 1.38 0.60 910 2.22 1.33 0.60 935
25 22 2.62 1.26 0.48 901 2.45 1.18 0.48 952 2.36 1.13 0.48 969
25 24 2.76 0.99 0.36 935 2.59 0.93 0.36 978 2.52 0.91 0.36 999
26 18 2.35 1.79 0.76 833 2.16 1.64 0.76 884 2.08 1.58 0.76 901
26 20 2.47 1.58 0.64 867 2.30 1.47 0.64 910 2.22 1.42 0.64 935
26 22 2.62 1.36 0.52 901 2.45 1.27 0.52 952 2.36 1.23 0.52 969
26 24 2.76 1.10 0.40 935 2.59 1.04 0.40 978 2.52 1.01 0.40 999
26 26 2.90 0.81 0.28 969 2.74 0.77 0.28 1012 2.65 0.74 0.28 1033
27 18 2.35 1.88 0.80 833 2.16 1.73 0.80 884 2.08 1.66 0.80 901
27 20 2.47 1.68 0.68 867 2.30 1.57 0.68 910 2.22 1.51 0.68 935
27 22 2.62 1.46 0.56 901 2.45 1.37 0.56 952 2.36 1.32 0.56 969
27 24 2.76 1.21 0.44 935 2.59 1.14 0.44 978 2.52 1.11 0.44 999
27 26 2.90 0.93 0.32 969 2.74 0.88 0.32 1012 2.65 0.85 0.32 1033
28 18 2.35 1.98 0.84 833 2.16 1.81 0.84 884 2.08 1.74 0.84 901
28 20 2.47 1.78 0.72 867 2.30 1.66 0.72 910 2.22 1.60 0.72 935
28 22 2.62 1.57 0.60 901 2.45 1.47 0.60 952 2.36 1.42 0.60 969
28 24 2.76 1.32 0.48 935 2.59 1.24 0.48 978 2.52 1.21 0.48 999
28 26 2.90 1.05 0.36 969 2.74 0.98 0.36 1012 2.65 0.95 0.36 1033
29 18 2.35 2.07 0.88 833 2.16 1.90 0.88 884 2.08 1.83 0.88 901
29 20 2.47 1.88 0.76 867 2.30 1.75 0.76 910 2.22 1.69 0.76 935
29 22 2.62 1.67 0.64 901 2.45 1.57 0.64 952 2.36 1.51 0.64 969
29 24 2.76 1.44 0.52 935 2.59 1.35 0.52 978 2.52 1.31 0.52 999
29 26 2.90 1.16 0.40 969 2.74 1.09 0.40 1012 2.65 1.06 0.40 1033
30 18 2.35 2.16 0.92 833 2.16 1.99 0.92 884 2.08 1.91 0.92 901
30 20 2.47 1.98 0.80 867 2.30 1.84 0.80 910 2.22 1.78 0.80 935
30 22 2.62 1.78 0.68 901 2.45 1.66 0.68 952 2.36 1.61 0.68 969
30 24 2.76 1.55 0.56 935 2.59 1.45 0.56 978 2.52 1.41 0.56 999
30 26 2.90 1.28 0.44 969 2.74 1.20 0.44 1012 2.65 1.17 0.44 1033
31 18 2.35 2.26 0.96 833 2.16 2.07 0.96 884 2.08 1.99 0.96 901
31 20 2.47 2.08 0.84 867 2.30 1.94 0.84 910 2.22 1.86 0.84 935
31 22 2.62 1.88 0.72 901 2.45 1.76 0.72 952 2.36 1.70 0.72 969
31 24 2.76 1.66 0.60 935 2.59 1.56 0.60 978 2.52 1.51 0.60 999
31 26 2.90 1.39 0.48 969 2.74 1.31 0.48 1012 2.65 1.27 0.48 1033
32 18 2.35 2.35 1.00 833 2.16 2.16 1.00 884 2.08 2.08 1.00 901
32 20 2.47 2.18 0.88 867 2.30 2.03 0.88 910 2.22 1.95 0.88 935
32 22 2.62 1.99 0.76 901 2.45 1.86 0.76 952 2.36 1.80 0.76 969
32 24 2.76 1.77 0.64 935 2.59 1.66 0.64 978 2.52 1.61 0.64 999
32 26 2.90 1.51 0.52 969 2.74 1.42 0.52 1012 2.65 1.38 0.52 1033

CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 850(W)

OUTDOOR DB(:)

INDOOR

INDOOR

DB(:)

WB(:)

Q

SHC

SHF

INPUT

Q

SHC SHF INPUT Q SHC SHF INPUT

35 40 43

COOL operation (230V)

MSC-A07WV - MSC-A07YV - (Single : Room B or C) : MUX-A22WV -

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

14

E1E1E1

10

ACTUATOR

ON
OFF

ON

OFF
ON

OFF
ON (OPEN)
OFF (CLOSE)
ON (OPEN)
OFF (CLOSE)

ON (CLOSE)

OFF (OPEN)

SOLENOID VALVE

INDOOR UNIT

MC1

MC2

MF61

21R3

21R4

21RB

COMPRESSOR

OUTDOOR
FAN MOTOR

A

ON

OFF

–
–
–
–

OFF

–
–
–
–
–
–
–
–

B

–

–
ON
ON

OFF
OFF

ANY UNIT ON

OFF

ON

OFF

–

–
ON
ON

OFF
OFF

C
–

–

ON

OFF

ON

OFF

OFF

–
–

ON

OFF

ON

OFF

ON

OFF

MUX-A22WV - E1

“–” means that the indoor unit is not related to the control of actuator.

Lead wiring

Housing point

MICROPROCESSOR CONTROL

MUX-A22WV -

E1

OUTDOOR UNIT ACTUATOR CONTROL

11

MUX-A22WV -

11-1. Cautions on troubleshooting

TROUBLESHOOTING

E1

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, first be sure to turn off the remote controller to stop the 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) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the
components for bursting and discoloration.

3) When troubleshooting, refer to the flow chart on page 16.

15

11-2. Instruction of troubleshooting

Start

Indoor unit
operates.
Outdoor unit
doesn't
operate.

Indoor unit
doesn't receive
the signal from
remote controller.

Indoor unit
operates.
But indoor
unit doesn't
blow out
cool air.

Indoor unit
operates.
Outdoor unit
doesn't operate
normally.

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.

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".

Refer to A
"Check of
outdoor unit"
on page 18.

Refer to
"Check of
remote
controller
and receiver
P.C. board".

Flash on and
off at 0.5-second
intervals
Cause:
Wrong setting
of switch (SW2-2)
on the electronic
control P.C. board.

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

Check room
temperature
thermistor
and indoor
coil thermis­tor.
Refer to
"Test point
diagram and
voltage".

Refer to
"Check of
indoor fan
motor".

Refer to C
"Check of
MU & MUX TYPE /
MUH & MXZ TYPE
SWITCH OVER "
(When
outdoor unit
doesn't work.)
on page 19.

1. Check indoor /
outdoor
connecting wire.

2. Refer to
"Check of indoor
electronic control
P.C. board".

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

Refer to B
"Check of
outdoor unit"
on page 19.

Refer to D
"Check of
indoor / outdoor
units' connection
and outdoor unit"
on page 19.

As for indoor unit, refer to service manual
OB307 REVISED EDITION-C.

MUX-A22WV -

E1

16

P

MUX-A22WV -

BLK

RED

WHT

P

E1

Part name

Compressor
(MC1, MC2)
INNER
PROTECTOR
150°C OPEN

90°C CLOSE

Outdoor fan
motor

(MF61)
INNER

PROTECTOR
145i8°C OPEN

Solenoid coil

21RB, 21R3,
21R4

Check method and criterion

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

C-R
C-S

RN145VHSHT

2.14 ~ 2.63

3.35 ~ 4.11

Normal

RN092VHSHT

Ω
Ω

3.41 ~ 4.18

5.41 ~ 6.63

Ω
Ω

Abnormal

short-circuit

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

Color of lead

wire
WHT-BLK
BLK-RED

Normal Abnormal

79 ~ 98Ω

129 ~ 158

Ω

Open or

short-circuit

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

Normal

1410 ~ 1730Ω

Abnormal

Open or short-circuit

Figure

Open or

P Inner protector

17

No

Start

Press the EMERGENCY
OPEERATION switch of all
indoor units.

Yes

Is there 230V AC
between L

- N

on the TB1

of outdoor unit?

No

Is fuse(F61) on the outdoor
control P.C. board blown?

Check and rectify the
connecting wire of
indoor and outdoor unit.

3 minutes later, is there
12V DC between
1 - 2 on the all terminal
blocks of outdoor unit?

Is there 10~15V DC between
JP20 DC12V and JP19 GND
on outdoor control P.C.
board?

Fan motor doesn't operate.

Compressor doesn't operate.

Yes

Yes

Turn OFF the power supply
to outdoor unit.

Does outdoor control P.C.
board connect with outdoor
fan capacitor C61?

Yes

Connect the outdoor control
P.C. board with outdoor fan
capacitor C61.

Disconnect connector of
outdoor fan motor CN91
and outdoor fan capacitor
C61.

Replace the outdoor
fan motor.

Replace the outdoor
control P.C. board.

No

Yes

Turn OFF the power supply.

Replace the outdoor
control P.C. board.

No

Disconnect connector of outdoor fan motor
CN91 and outdoor fan capacitor C61.

Is the resistance 0" or ∞ between the lead wire
WHT and BLK of outdoor fan motor, or between
the lead wire RED and BLK of outdoor fan motor?
(Refer to page 17.)

Yes

Replace the outdoor
fan motor and fuse(F61).

No

Check the power supply
and connecting wire.

No

Is there 12V DC between

1

- 2

on the terminal

block of each indoor unit?

No

Short both terminal
of fuse(F61).

Yes

Is the resistance 0" between
the fuse(F61) and the terminal
of CN903?

Replace the outdoor
control P.C. board.

Yes

Replace
the fuse(F61).

No

No

Check the indoor unit.

Yes

Turn OFF the power supply to outdoor unit.
Disconnect connecting wire of X521 and X522 from outdoor control P.C. board.
Insulate terminal of connecting wires to prevent contact of other parts.
Turn ON the power supply to outdoor unit.
Press the EMERGENCY OPERATION switch of all indoor unit.

Is the resistance 0" or ∞
between the terminal C and
R of MC1, and between the
terminal C and S of MC1?
(Refer to page 17.)

3 minutes later, is the resistance 0" between the
terminal 3 and 4 of X521 on outdoor control P.C. board,
and between the terminal 3 and 4 of X522 on outdoor
control P.C. board?

Turn OFF the power supply
to outdoor unit.

Yes

Replace the
compressor MC1.

No

Replace the
compressor MC2.

No

Check and
rectify the
connecting wire
of terminal and
compressor.

Turn OFF the power supply
to outdoor unit.

No

Replace the outdoor
control P.C. board.

Is the resistance 0" or ∞
between the terminal C and
R of MC2, and between the
terminal C and S of MC2?
(Refer to page 17.)

Yes

Yes

Is the resistance 0" or ∞
between the lead wire
WHT and BLK of outdoor
fan motor, or between the
lead wire RED and BLK
of outdoor fan motor?
(Refer to page 17.)

Measure resistance all
the solenoid coil.

Is resistance 0"?

Replace the solenoid coil.

Yes

No

Compressor and / or outdoor fan doesn’t operate.

AA

Check of outdoor unit

18

Compressor and / or outdoor fan doesn’t stop.

Turn ON the power supply, and operate all the indoor
units at a time.

Yes

No

Operate the indoor unit one by one, and measure
the voltage between 1 and 2 of outdoor
terminal block for each indoor unit.
Match the signs of terminal block whose voltage is
12V DC and pipe of indoor/ outdoor units' connection.
w1.

Do they perform the cooling operation?

Start

Indoor
unit

Model

Terminal
block

Connector for

solenoid coil control
B
C

TB3
TB4

21R3-CN85
21R4-CN86

21RB-CN81

w1. If the pipe of indoor unit that does not operate is cooled
though the combination of pipe and connecting wire is correct,
check the solenoid coil. Refer to page 7.

Turn OFF the power supply.
Remove solenoid coil's connector that corresponds
to the indoor unit, which does not blow out cool air.
Then, measure the resistance of solenoid coil.

Do the resistance value normal?
(Refer to page 17.)

Yes

Reconnect solenoid coil's connector.
Then turn the main power on and operate the
indoor unit that does not blow out cool air.
Measure the voltage of solenoid coil's connector that
corresponds to the indoor unit, which is operated.

Replace the solenoid coil.

No

Is voltage 230V?

Yes

No

OK

MUX-A22WV

Replace the outdoor
control P.C. board.

BB

Check of outdoor unit

Start

Turn OFF the power supply.
After 1 minute, turn ON
power supply again.

Is there 12V DC between

Does compressor or
outdoor fan motor stop?

Yes

OK

No

1–2 on the outdoor
terminal block (TB2 or TB3)?

Replace the indoor
electoronic control
P.C. board.

Yes

No

Replace the outdoor
control P.C. board.

When OPERATION INDICATOR lamp flashes 0.5-second intervals.
Outdoor unit doesn’t operate.

CC

Check of MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER

Start

Turn OFF the power supply (indoor / outdoor unit).

Set switch (SW2-2) on the indoor electronic
control P.C. board to MUX type.

Does the unit operate?

Refer to the
"Instruction of
troubleshooting."

w1

Yes

No

w 1 Set the switch (SW2-2) on indoor electronic control P.C. board to

MUX type, when the outdoor unit is MUX type.
If the setting is MUH or MXZ type, the unit does not work.
Refer to MU & MUX TYPE / MUH& MXZ TYPE SWITCH OVER
on service manual OB307 REVISED EDITON-C (11-6.1.) or

OK

OB329 (9-4.1.).

Cool air doesn’t blow out although indoor unit is operating.

DD

Check of indoor / outdoor units’ connection and outdoor unit

w In case of troubleshooting, be sure to operate indoor unit by emergency operation switch.

19

TEST POINT DIAGRAM AND VOLTAGE
MUX-A22WV -

E1

Outdoor control P.C. board

To fan
capacitor
C61

From
indoor unit A
12V DC
1+, 3-

From
indoor unit B
12V DC
1+, 3-

From
indoor unit C
12V DC
1+, 3-

To fan motor

230V AC 50Hz

BLK

WHT

JP20 DC12V JP19 GND

+

}

12V DC

To fan
capacitor
C61

To indoor unit B
Solenoid coil 21R3
230V AC 50Hz

To indoor unit C
Solenoid coil 21R4
230V AC 50Hz

Fuse 250V AC

3.15A

To solenoid coil
21RB
230V AC 50Hz

Terminal 4 of
X521

Terminal 3 of
X521

Terminal 4 of
X522

Terminal 3 of
X522

Power supply
input
230V AC 50Hz

Surge absorber
NR61

20

12

(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

1Slide the sleeve.
2Pull the terminal while

pushing the locking
lever.

1Hold the sleeve, and
pull out the terminal
slowly.

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.

<"Terminal with lock mechanism" Detaching points>

Connector

Sleeve

Locking lever

DISASSEMBLY INSTRUCTIONS

12-1. MUX-A22WV -

E1

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

1.Removing the cabinet

(1) Remove the screws of the top panel.
(2) Remove the screws of the service panel.
(3) Remove the top panel.
(4) Remove the service panel.
(5) Remove the screws of the front panel.
(6) Remove the front panel.
(7) Remove the screws of the back panel.
(8) Remove the back panel.

Photo 3

Back panel

Photo 1

Set screws
of the front
panel

Photo 2

Top panel

Front
panel

Set screws
of the front panel

Set screws
of the top panel

Set screws of the
back panel

21

Set screws
of the front panel

Service panel

Set screws
of the ser­vice panel

Set screws
of the back
panel

OPERATING PROCEDURE PHOTOS

2. Removing the relay panel

(1) Remove the cabinet. (Refer to 1.)
(2) Disconnect the following connectors.

.

Outdoor fan motor

.

Solenoid coil (21RB, 21R3, 21R4)

3. Removing the propeller

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the propeller nut.
(3) Remove 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.

4. Removing the outdoor fan motor

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the propeller. (Refer to 3.)
(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.

5. Removing the compressor (A, B)

(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.

)

(

Remove the compressor.

10

Photo 4

Set screws of the
outdoor fan motor

Back panel

Outdoor
fan
motor

Propeller

Photo 5

Suction pipe

Solenoid coil connector
(21RB, 21R3, 21R4)

Outdoor fan

motor connector
Set screws
of the relay
panel

Clamp

Propeller nut

Terminal cover

Set screws
of the relay
panel

NOTE

● Before using a burner, reclaim gas from the pipes until the
pressure gauge shows 0 kg/cm

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

2

(0 MPa).

6. Removing the compressor (C)

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the relay panel. (Refer to 2.)
(3) Remove the screws fixing back panel.
(4) Remove the back panel.
(5) Remove the soundproof felt.
(6) Remove the terminal cover on the compressor.
(7) Disconnect lead wires from the compressor.
(8) Recover gas from the refrigerant circuit.
(9) Disconnect the welded part of the discharge pipe.

)

(

Disconnect the welded part of the suction pipe.

10

(11)

Remove nuts fixing the compressor.

(12)

Remove the compressor.

NOTE

● Before using a burner, reclaim gas from the pipes until the
pressure gauge shows 0 kg/cm

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

2

(0 MPa).

22

Discharge
pipe

Soundproof felt

Terminal cover

13

PARTS LIST

MUX-A22WV -

E1

13-1. OUTDOOR UNIT STRUCTURAL PARTS

1

2

3

4

5

17

16

6

14

13

12

6

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

No.

10
11

12
13

14
15
16
17
18
19
20
21
22

Part No.

1

E02 819 297

2

E02 636 515

3

E02 756 630

4

E02 737 232

5

E02 819 521

6

E02 819 009

7

E02 742 900

8

E02 744 900
E02 289 936

9

E02 134 936
E02 075 506
E02 756 290
E02 756 661
E02 757 661
E02 756 662
E02 024 936
E02 756 245
E02 757 233

E02 817 009
E02 637 490
E02 652 490
E02 652 491
E02 755 492
E02 759 492

TOP PANEL
MOTOR SUPPORT
OUTDOOR HEAT EXCHANGER
CABINET
FAN GUARD
HANDLE
COMPRESSOR
COMPRESSOR
CAPILLARY TUBE
CAPILLARY TUBE
COMPRESSOR RUBBER SET
BASE
STOP VALVE (GAS)
STOP VALVE (GAS)
STOP VALVE (LIQ)
CAPILLARY TUBE
SERVICE PANEL
BACK PANEL (OUT)
HANDLE
SOLENOID COIL
SOLENOID COIL (B)
SOLENOID COIL (C)
SOLENOID VALVE
SOLENOID VALVE

Part Name

7 8 9 10

Symbol

in Wiring

Diagram

CT1, CT3, CT4

MC2
MC1

CT2

CT5

21RB

21R3
21R4

23

11

Q'ty / unit

MUX-A22WV-

15

E1

1
1
1
1
1
2
1
1
3
1
6
1
1
2
3
1
1
1
1
1
1
1
2
1

Remarks

NEW WHITE (Brigter)

NEW WHITE (Brigter)
NEW WHITE (Brigter)
NEW WHITE (Brigter)
RN092VHSHT
RN145VHSHT

[3.0O[1.6O900

[3.0O[1.6O700

3RUBBERS/SET
NEW WHITE (Brigter)

[12.7
[9.52
[6.35
[3.0O[1.4O1000

NEW WHITE (Brigter)
NEW WHITE (Brigter)
NEW WHITE (Brigter)

MUX-A22WV -

E1

13-2. OUTDOOR UNIT

FUNCTIONAL PARTS AND ELECTRICAL PARTS

2

No.

10
11
12

Part No. Part Name

1

E02 756 301

2

E02 214 501

3

E02 757 444

4

E02 085 385
E02 637 374

5

E02 637 377

6

E02 756 374

7

E02 138 351

8

E02 127 382

9

E02 742 353
E02 667 353
E02 128 383
E07 056 374

1

OUTDOOR FAN MOTOR
PROPELLER
OUTDOOR CONTROL P.C. BOARD
SURGE ABSORBER
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
OUTDOOR FAN CAPACITOR
FUSE
COMPRESSOR CAPACITOR
COMPRESSOR CAPACITOR
SURGE ABSORBER
TERMINAL BLOCK

12

11

10

9

8

7

6

B

A

35

Symbol

in Wiring

Diagram

MF61

NR61

TB2
TB3
TB1
C61
F61

C2
C1

DSAR

TB4

4

Q'ty / unit

MUX-A22WV-

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

E1

Remarks

RA6V60-

4P FIGURE A
3P FIGURE B
3P

3.0+/440V AC

3.15A
20+/450V AC
30+/450V AC

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

CC

Copyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in May 2004. No.OB318 REVISED EDITION-A 6
Distributed in Oct. 2003. No.OB318 7
Made in Japan

New publication, effective May 2004
Specifications subject to change without notice.