Mitsubishi MUH-A07YV - E1, MUH-A09YV - E1, MUH-A12YV - E1 Service Manual

SERVICE MANUAL

HFC

utilized

R410A

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type
Models

Revision A:

●MUH-A12YV - can be connected to
MCFH-A12WV - .

Please void OB331.

E1

E1

No. OB331

REVISED EDITION-A

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

Indication of
model name

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

E1

E1

E1

CONTENTS

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

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

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

4. NOISE CRITERIA CURVES·······························6

5. OUTLINES AND DIMENSIONS·························7

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

E1

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

E1

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

E1

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

10. SERVICE FUNCTIONS·····································24

11. TROUBLESHOOTING ······································24

12. DISASSEMBLY INSTRUCTIONS·····················31

13. PARTS LIST······················································34

NOTE:

•This manual describes technical data of outdoor units.

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

•As for indoor unit MCFH-A12WV - , refer to the service manual OB336.

E1

E1

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

Revision A:

•MUH-A12YV - can be connected to MCFH-A12WV - .
SPECIFICATION, PERFORMANCE CURVES and TROUBLESHOOTING have been added.

E1E1

1

MUH-A07WV- ➔MUH-A07YV-

1. Outdoor heat exchanger has changed.

2. Outdoor fan motor has changed. (RA6V23-FB➔RC6V20-AB)

MUH-A09WV- ➔MUH-A09YV­MUH-A12WV- ➔MUH-A12YV-

1. Outdoor heat exchanger has changed.

2. Outdoor fan motor has changed. (RA6V33-DB➔RA6V33-FB)

TECHNICAL CHANGES

E1E1

E1E1

E1E1

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 R410Arefrigerant 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.

2

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

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

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

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

Conversion chart of refrigerant temperature and pressure

(MPa [Gauge])

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

Saturated liquid pressure

0.0

-0.5

-30 -20 -10 0 10 20

R410A
R22

30

40 50 60

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

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/

(:)

3

ff

[Gauge])

R410A

Pipe diameter

mm

6.35

9.52

12.7

17
22
26

Dimension of flare nut

R22

17
22
24

Electronic scale for refrigerant charging

Outdoor unit

Refrigerant gas
cylinder
operating valve

Refrigerant gas cylinder
for R410A with siphon

Refrigerant (liquid)

Service port

Gauge manifold
valve (for R410A)

Union

Liquid pipe
Gas pipe

Stop valve

Indoor unit

Charge hose (for R410A)

2.Refrigerant piping

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

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.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.

4

2

Air inlet

Piping

Drain hose

Air outlet

Drain outlet

(back and side)

Drain socket
Drain cap

1
2

<Outdoor unit: MUH type>

1

2

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:)

kW

R/h

K /h

A
A

W

A(kW)

%

A
A
A

W

"

"

mm

kg

dB

rpm

kg
cc

k"

MUH-A07YV -

E1

Single phase

230V,50Hz

1,686

10

—

23

0.22

RN092VHSHT

600
C-R 3.87
C-S 6.14

RC6V20-AB

WHT-BLK 410

BLK-RED 433
780o540o255

35
47

735

1

0.62

350 (NEO22)

33.18

Cooling

2.3

0.9

3.00
680

98

2.78

3.22

Heating

2.5
—

2.86
655

99

2.64

3.62

MUH-A09YV - E1

Single phase

230V,50Hz

1,710

10

—

24

0.31

RN104VHSHT

700
C-R 3.40
C-S 4.56

RA6V33-FB

WHT-BLK 223

BLK-RED 228
780o540o255

38
49

825

1

1.00

350 (NEO22)

33.18

Cooling

2.55

1.1

3.32
760

99

3.01

3.21

Heating

3.05
—

3.52

805

99

3.21

3.69

MUH-A12YV -

E1

Indoor model

MSC-A12YV -

E1

Single phase

230V,50Hz

1,710

10

—

29

0.31

RN135VHSHT

900
C-R 2.79
C-S 3.36

RA6V33-FB

WHT-BLK 223

BLK-RED 228
780o540o255

40
49

825

1

1.00

620 (NEO22)

33.18

Cooling

3.5

1.7

4.65

1,050

98

4.34

3.21

Heating

3.9
—

4.60

1,040

98

4.29

3.61

Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity

Coefficient of performance (C.O.P)

Outdoor unit power supply

Function

Outdoor model

MUH-A12YV -

E1

Indoor model

MCFH-A12WV -

E1

Single phase

230V,50Hz

1,710

10

—

29

0.31

RN135VHSHT

900
C-R 2.79
C-S 3.36

RA6V33-FB

WHT-BLK 223

BLK-RED 228
780o540o255

40
49

825

1

1.00

620 (NEO22)

33.18

Cooling

3.5

1.5

4.85

1,094

98

4.54

3.02

Heating

3.7
—

4.23
954

98

3.92

3.63

PART NAMES AND FUNCTIONS

OUTDOOR UNIT

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

3

SPECIFICATION

E1

E1

E1

ACCESSORIES

MUH-A07YV­MUH-A09YV­MUH-A12YV-

E1

E1

E1

NOTE: Test conditions are based on ISO 5151.

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

5

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

4

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-A09YV- E1
MUH-A12YV- E1

COOL

FUNCTION

49

HEAT

SPL(dB

(A)) LINE

OUTDOORUNIT

MICROPHONE

1m

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-A07YV- E1

COOL

FUNCTION

47

HEAT

SPL(dB

(A)) LINE

NOISE CRITERIA CURVES

6

5

SYMBOL

T61

TB1,TB2

21S4

52C

SYMBOL

MF

NR61
RT61

SR61,SR62

SYMBOL

C1

C65

DSAR

F61

MC

NAME

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

VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY

TRANS FORMER
TERMINAL BLOCK
R.V. COIL
COMPRESSOR CONTACTOR

OUTDOOR FAN MOTOR
(INNER FUSE/INNER PROTECTOR)

OUTLINES AND DIMENSIONS

MUH-A07YV - MUH-A09YV - MUH-A12YV -

OUTDOOR UNIT

32

109

Air in

Drainage
3holes [33

540

260

40

10

320

Air in

147

122

110

Air out

500
780

74

255

285

155

320

25

90

E1E1E1

REQUIRED SPACE

100mm or more

104

100mm or more

400mm or more

Service panel

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35

35-

43-

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [9.52 (MUH-A07/A09YV
[12.7 (MUH-A12YV

Unit: mm

100mm or more

350mm or more

)

)

6

WIRING DIAGRAM

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

OUTDOOR UNIT

E1

E1

E1

TO
INDOOR UNIT
CONNECTING
12V

CIRCUIT BREAKER

POWER SUPPLY
~/N

50Hz

230V

MODELS WIRING DIAGRAM

DSAR

RT61

1
2
3

TAB20

CN661

CN730

F61

PE

TB2

3
N

TB1

L

N

GRN/YLW

RED
BLK

BRN

BRN

BLU

BLU

T61

4

21S4

CN721

NR61

52C

3

DEICER P.C.BOARD

C1

RED
BLK

SR62

SR61

WHT

S

CN711

1
2
3

C65

C

MC

MF

WHT
BLK
RED

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

7

7

REFRIGERANT SYSTEM DIAGRAM

MUH-A07YV ­MUH-A09YV -

E1

E1

OUTDOOR UNIT

Refrigerant pipe [ 9.52

(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe [6.35

(with heat insulator)

Stop valve
(with service
port)

Strainer
#100

Stop valve

4-way valve

Defrost
thermistor
RT61

Muffler

Compressor

Capillary tube

[3.0x[1.4x500(MUH-A07YV)
[3.0x[1.4x600(MUH-A09YV)

Check valve

Capillary tube

[3.0x[1.4x600(MUH-A07YV)
[3.0x[1.4x1000(MUH-A09YV)

Refrigerant flow in cooling
Refrigerant flow in heating

Unit:mm

Outdoor
heat
exchanger

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

(MUH-A07YV)
[3.0x[1.4x500(2 pcs)

(MUH-A09YV)

R.V. coil
heating ON
cooling OFF

MUH-A12YV -

E1

OUTDOOR UNIT

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
#100

Stop valve

Muffler

Compressor

Capillary tube
[3.0x[1.6x1050

Check
valve

Defrost
thermistor
RT61

Unit:mm

Outdoor
heat
exchanger

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

Capillary tube
[3.0x[1.6x600

R.V. coil
heating ON
cooling OFF

Refrigerant flow in cooling
Refrigerant flow in heating

8

MAX. REFRIGERANT PIPING LENGTH

Refrigerant piping

Model

Max. length : m

A

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

Liquid

Indoor unit

Outdoor unit

MUH-A07YV - E1
MUH-A09YV - E1

MUH-A12YV - E1

20

25

9.52

12.7

MAX. HEIGHT DIFFERENCE

Indoor
unit

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

w Max. Height
difference 10m

ADDITIONAL REFRIGERANT CHARGE(R410A : g)

Model

MUH-A07YV - E1

Outdoor unit precharged

7m

620

Gas 0.43

6.35
Liquid 0.5

Refrigerant Piping

Max.length

A

Refrigerant piping length (one way)

10m

15m

20m

Gas 0

Liquid 0

Outdoor unit

25m

MUH-A09YV - E1
MUH-A12YV - E1

8

PERFORMANCE CURVES

1000

0

MUH-A07YV - MUH-A09YV - MUH-A12YV -

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.

60

E1E1E1

160

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

260

360

(1) GUARANTEED VOLTAGE

198~264V

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °CWB
(2) Indoor outlet air wet-bulb temperature : °CWB
(3) Outdoor intake air dry-bulb temperature : °CDB
(4) Total input: W
(5) Indoor intake air dry-bulb temperature : °CDB
(6) Outdoor intake air wet-bulb temperature : °CWB
(7) Total input : W
Indoor air wet/dry-bulb temperature difference on the left side of the chart on 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.

}

}

Cooling

Heating

9

MSC-A07YV - E1

MUH-A07YV - E1

MUH-A12YV - E1

MSC-A12YV - E1

MUH-A09YV - E1

MSC-A09YV - E1

8.5

7.8

7.1

6.4

5.8

5.1

9.6

8.8

8.0

7.2

6.5

5.7

11.0

10.0

9.1

8.2

7.4

6.5

8.7

8.0

7.3

6.6

5.9

5.3

MUH-A12YV - E1

MCFH-A12WV - E1

20.4

18.8

17.2

15.7

14.1

12.5

11.0

9.4

19.2

17.8

16.3

14.8

13.3

11.8

10.4

8.9

MSC-A07YV - E1

MUH-A07YV - E1

MUH-A09YV - E1

MSC-A09YV - E1

MUH-A12YV - E1

MSC-A12YV - E1

25.2

23.3

21.4

19.4

17.5

15.5

13.6

11.7

MUH-A12YV - E1

MCFH-A12WV - E1

18.6

17.2

15.7

14.3

12.9

11.5

10.0

8.6

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

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

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

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

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

(HEAT) MODE.

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

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

INDOOR UNIT

Wet-and dry-bulb
thermometers

8-1.CAPACITY AND THE INPUT CURVES

OUTDOOR UNIT

Wet-and dry-bulb
thermometers

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

10

8-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

18 32

230V

15 20

50

25
60

30

70(%)

35(:)

0.7

0.8

0.9

1.0

1.1

1.2

1.3

7

8

9

10

11

12

13

15 20

50

25
60

30
70(%)

35(:)

1

2

4

3

18 32

230V

18 32

230V

15 20

50

25
6030 70(%)

35(:)

0.7

0.8

0.9

1.0

1.1

1.2

1.3

7

8

9

10

11

12

13

15 20

50

25
60

30
70(%)

35(:)

1

2

4

3

18 32

230V

18 32

230V

15 20

50

25
60

30

70(%)

35(:)

0.7

0.8

0.9

1.0

1.1

1.2

1.3

7

8

9

10

11

12

13

15 20

50

25
60

30
70(%)

35(:)

2

3

5

4

18 32

230V

COOL operation

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

Dry-bulb temperature

20
25

Relative humidity(%)

50
60

30 70

➁ Air flow should be set at MAX.

③ The unit of pressure has been changed to MPa on the international system of units(SI unit system).

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

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

Outdoor low pressure

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

MUH-A07YV -

Ambient temperature(˚C)
Ambient humidity(%)

MUH-A09YV -

E1

MUH-A07YV -

Outdoor unit current (A)

Ambient temperature(˚C)
Ambient humidity(%)

E1

MUH-A09YV -

E1

E1

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

Outdoor low pressure

Ambient temperature(˚C)
Ambient humidity(%)

MUH-A12YV ­( Indoor unit : MSC-A12YV - )

Outdoor low pressure

Ambient temperature(˚C)
Ambient humidity(%)

Outdoor unit current (A)

Ambient temperature(˚C)
Ambient humidity(%)

E1

E1

MUH-A12YV ­( Indoor unit : MSC-A12YV - )

E1

E1

Outdoor unit current (A)

Ambient temperature(˚C)
Ambient humidity(%)

11

7

21

230V

(:)

5 10152025

3

4

5

6

7

21

230V

(:)

5 10152025

2

3

4

5

7

21

230V

(:)

5 10152025

2

3

4

5

18 32

230V

15 20

50

25
6030 70(%)

35(:)

3

4

5

6

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

7

21

230V

(:)

5 10152025

3

4

5

6

1.3

13

1.2

12

1.1

11

1.0

10

0.9

9

Outdoor low pressure

0.8

8

0.7

7

15 20

HEAT operation

Condition indoor:Dry bulb temperature 20.0°C

MUH-A12YV -

E1

( Indoor unit : MCFH-A12WV - )

230V

18 32

50

Ambient temperature(˚C)
Ambient humidity(%)

Wet bulb temperature 14.5°C

25
6030 70

35(:)

(%)

MUH-A12YV -

E1

( Indoor unit : MCFH-A12WV - )

E1

Outdoor unit current (A)

Ambient temperature(˚C)
Ambient humidity(%)

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

Wet bulb temperature 6,12,14.5°C

E1

MUH-A07YV -

E1

MUH-A09YV -

E1

Outdoor unit current (A)

Ambient temperature(˚C)

MUH-A12YV ­( Indoor unit : MSC-A12YV - )

Outdoor unit current (A) Outdoor unit current (A)

E1

E1

Outdoor unit current (A)

Ambient temperature(˚C)

Ambient temperature(˚C)

MUH-A12YV ­( Indoor unit : MCFH-A12WV - )

E1

E1

Ambient temperature(˚C)

12

PERFORMANCE DATA

21 18 2.70 1.51 0.56 572 2.59 1.45 0.56 601 2.48 1.39 0.56 629 2.39 1.34 0.56 658
21 20 2.82 1.24 0.44 601 2.70 1.19 0.44 636 2.62 1.15 0.44 651 2.53 1.11 0.44 679
22 18 2.70 1.62 0.60 572 2.59 1.55 0.60 601 2.48 1.49 0.60 629 2.39 1.44 0.60 658
22 20 2.82 1.35 0.48 601 2.70 1.30 0.48 636 2.62 1.26 0.48 651 2.53 1.21 0.48 679
22 22 2.93 1.06 0.36 622 2.83 1.02 0.36 661 2.76 0.99 0.36 679 2.65 0.95 0.36 708
23 18 2.70 1.73 0.64 572 2.59 1.66 0.64 601 2.48 1.59 0.64 629 2.39 1.53 0.64 658
23 20 2.82 1.47 0.52 601 2.70 1.41 0.52 636 2.62 1.36 0.52 651 2.53 1.32 0.52 679
23 22 2.93 1.17 0.40 622 2.83 1.13 0.40 661 2.76 1.10 0.40 679 2.65 1.06 0.40 708
24 18 2.70 1.84 0.68 572 2.59 1.76 0.68 601 2.48 1.69 0.68 629 2.39 1.63 0.68 658
24 20 2.82 1.58 0.56 601 2.70 1.51 0.56 636 2.62 1.47 0.56 651 2.53 1.42 0.56 679
24 22 2.93 1.29 0.44 622 2.83 1.24 0.44 661 2.76 1.21 0.44 679 2.65 1.16 0.44 708
24 24 3.08 0.99 0.32 651 2.97 0.95 0.32 686 2.90 0.93 0.32 708 2.81 0.90 0.32 744
25 18 2.70 1.95 0.72 572 2.59 1.86 0.72 601 2.48 1.79 0.72 629 2.39 1.72 0.72 658
25 20 2.82 1.69 0.60 601 2.70 1.62 0.60 636 2.62 1.57 0.60 651 2.53 1.52 0.60 679
25 22 2.93 1.41 0.48 622 2.83 1.36 0.48 661 2.76 1.32 0.48 679 2.65 1.27 0.48 708
25 24 3.08 1.11 0.36 651 2.97 1.07 0.36 686 2.90 1.04 0.36 708 2.81 1.01 0.36 744
26 18 2.70 2.05 0.76 572 2.59 1.97 0.76 601 2.48 1.89 0.76 629 2.39 1.82 0.76 658
26 20 2.82 1.80 0.64 601 2.70 1.73 0.64 636 2.62 1.68 0.64 651 2.53 1.62 0.64 679
26 22 2.93 1.52 0.52 622 2.83 1.47 0.52 661 2.76 1.44 0.52 679 2.65 1.38 0.52 708
26 24 3.08 1.23 0.40 651 2.97 1.19 0.40 686 2.90 1.16 0.40 708 2.81 1.12 0.40 744
26 26 3.17 0.89 0.28 686 3.08 0.86 0.28 722 3.04 0.85 0.28 744 2.94 0.82 0.28 765
27 18 2.70 2.16 0.80 572 2.59 2.07 0.80 601 2.48 1.99 0.80 629 2.39 1.91 0.80 658
27 20 2.82 1.92 0.68 601 2.70 1.84 0.68 636 2.62 1.78 0.68 651 2.53 1.72 0.68 679
27 22 2.93 1.64 0.56 622 2.83 1.58 0.56 661 2.76 1.55 0.56 679 2.65 1.48 0.56 708
27 24 3.08 1.36 0.44 651 2.97 1.31 0.44 686 2.90 1.28 0.44 708 2.81 1.23 0.44 744
27 26 3.17 1.02 0.32 686 3.08 0.99 0.32 722 3.04 0.97 0.32 744 2.94 0.94 0.32 765
28 18 2.70 2.27 0.84 572 2.59 2.17 0.84 601 2.48 2.09 0.84 629 2.39 2.01 0.84 658
28 20 2.82 2.03 0.72 601 2.70 1.95 0.72 636 2.62 1.89 0.72 651 2.53 1.82 0.72 679
28 22 2.93 1.76 0.60 622 2.83 1.70 0.60 661 2.76 1.66 0.60 679 2.65 1.59 0.60 708
28 24 3.08 1.48 0.48 651 2.97 1.42 0.48 686 2.90 1.39 0.48 708 2.81 1.35 0.48 744
28 26 3.17 1.14 0.36 686 3.08 1.11 0.36 722 3.04 1.09 0.36 744 2.94 1.06 0.36 765
29 18 2.70 2.38 0.88 572 2.59 2.28 0.88 601 2.48 2.19 0.88 629 2.39 2.10 0.88 658
29 20 2.82 2.14 0.76 601 2.70 2.05 0.76 636 2.62 1.99 0.76 651 2.53 1.92 0.76 679
29 22 2.93 1.88 0.64 622 2.83 1.81 0.64 661 2.76 1.77 0.64 679 2.65 1.69 0.64 708
29 24 3.08 1.60 0.52 651 2.97 1.54 0.52 686 2.90 1.51 0.52 708 2.81 1.46 0.52 744
29 26 3.17 1.27 0.40 686 3.08 1.23 0.40 722 3.04 1.21 0.40 744 2.94 1.18 0.40 765
30 18 2.70 2.49 0.92 572 2.59 2.38 0.92 601 2.48 2.29 0.92 629 2.39 2.20 0.92 658
30 20 2.82 2.25 0.80 601 2.70 2.16 0.80 636 2.62 2.10 0.80 651 2.53 2.02 0.80 679
30 22 2.93 1.99 0.68 622 2.83 1.92 0.68 661 2.76 1.88 0.68 679 2.65 1.80 0.68 708
30 24 3.08 1.73 0.56 651 2.97 1.66 0.56 686 2.90 1.62 0.56 708 2.81 1.57 0.56 744
30 26 3.17 1.40 0.44 686 3.08 1.36 0.44 722 3.04 1.34 0.44 744 2.94 1.30 0.44 765
31 18 2.70 2.59 0.96 572 2.59 2.48 0.96 601 2.48 2.38 0.96 629 2.39 2.30 0.96 658
31 20 2.82 2.37 0.84 601 2.70 2.27 0.84 636 2.62 2.20 0.84 651 2.53 2.13 0.84 679
31 22 2.93 2.11 0.72 622 2.83 2.04 0.72 661 2.76 1.99 0.72 679 2.65 1.90 0.72 708
31 24 3.08 1.85 0.60 651 2.97 1.78 0.60 686 2.90 1.74 0.60 708 2.81 1.68 0.60 744
31 26 3.17 1.52 0.48 686 3.08 1.48 0.48 722 3.04 1.46 0.48 744 2.94 1.41 0.48 765
32 18 2.70 2.70 1.00 572 2.59 2.59 1.00 601 2.48 2.48 1.00 629 2.39 2.39 1.00 658
32 20 2.82 2.48 0.88 601 2.70 2.38 0.88 636 2.62 2.31 0.88 651 2.53 2.23 0.88 679
32 22 2.93 2.23 0.76 622 2.83 2.15 0.76 661 2.76 2.10 0.76 679 2.65 2.01 0.76 708
32 24 3.08 1.97 0.64 651 2.97 1.90 0.64 686 2.90 1.85 0.64 708 2.81 1.80 0.64 744
32 26 3.17 1.65 0.52 686 3.08 1.60 0.52 722 3.04 1.58 0.52 744 2.94 1.53 0.52 765

INDOOR

DB(:)

INDOOR

WB(:)

OUTDOOR DB(:)

21 2725

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT30Q SHC SHF INPUT

CAPACITY : 2.3(KW) SHF : 0.74 INPUT : 715(W)

COOL operation (230V)

MSC-A07YV - : MUH-A07YV -

E1E1

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

PERFORMANCE DATA

21 18 2.25 1.26 0.56 701 2.07 1.16 0.56 744 1.99 1.11 0.56 758
21 20 2.37 1.04 0.44 729 2.21 0.97 0.44 765 2.13 0.94 0.44 787
22 18 2.25 1.35 0.60 701 2.07 1.24 0.60 744 1.99 1.19 0.60 758
22 20 2.37 1.14 0.48 729 2.21 1.06 0.48 765 2.13 1.02 0.48 787
22 22 2.51 0.90 0.36 758 2.35 0.84 0.36 801 2.27 0.82 0.36 815
23 18 2.25 1.44 0.64 701 2.07 1.32 0.64 744 1.99 1.27 0.64 758
23 20 2.37 1.23 0.52 729 2.21 1.15 0.52 765 2.13 1.11 0.52 787
23 22 2.51 1.00 0.40 758 2.35 0.94 0.40 801 2.27 0.91 0.40 815
24 18 2.25 1.53 0.68 701 2.07 1.41 0.68 744 1.99 1.35 0.68 758
24 20 2.37 1.33 0.56 729 2.21 1.24 0.56 765 2.13 1.19 0.56 787
24 22 2.51 1.10 0.44 758 2.35 1.03 0.44 801 2.27 1.00 0.44 815
24 24 2.65 0.85 0.32 787 2.48 0.79 0.32 822 2.42 0.77 0.32 840
25 18 2.25 1.62 0.72 701 2.07 1.49 0.72 744 1.99 1.43 0.72 758
25 20 2.37 1.42 0.60 729 2.21 1.32 0.60 765 2.13 1.28 0.60 787
25 22 2.51 1.20 0.48 758 2.35 1.13 0.48 801 2.27 1.09 0.48 815
25 24 2.65 0.95 0.36 787 2.48 0.89 0.36 822 2.42 0.87 0.36 840
26 18 2.25 1.71 0.76 701 2.07 1.57 0.76 744 1.99 1.51 0.76 758
26 20 2.37 1.52 0.64 729 2.21 1.41 0.64 765 2.13 1.36 0.64 787
26 22 2.51 1.30 0.52 758 2.35 1.22 0.52 801 2.27 1.18 0.52 815
26 24 2.65 1.06 0.40 787 2.48 0.99 0.40 822 2.42 0.97 0.40 840
26 26 2.78 0.78 0.28 815 2.62 0.73 0.28 851 2.54 0.71 0.28 869
27 18 2.25 1.80 0.80 701 2.07 1.66 0.80 744 1.99 1.59 0.80 758
27 20 2.37 1.61 0.68 729 2.21 1.50 0.68 765 2.13 1.45 0.68 787
27 22 2.51 1.40 0.56 758 2.35 1.31 0.56 801 2.27 1.27 0.56 815
27 24 2.65 1.16 0.44 787 2.48 1.09 0.44 822 2.42 1.06 0.44 840
27 26 2.78 0.89 0.32 815 2.62 0.84 0.32 851 2.54 0.81 0.32 869
28 18 2.25 1.89 0.84 701 2.07 1.74 0.84 744 1.99 1.67 0.84 758
28 20 2.37 1.71 0.72 729 2.21 1.59 0.72 765 2.13 1.53 0.72 787
28 22 2.51 1.50 0.60 758 2.35 1.41 0.60 801 2.27 1.36 0.60 815
28 24 2.65 1.27 0.48 787 2.48 1.19 0.48 822 2.42 1.16 0.48 840
28 26 2.78 1.00 0.36 815 2.62 0.94 0.36 851 2.54 0.91 0.36 869
29 18 2.25 1.98 0.88 701 2.07 1.82 0.88 744 1.99 1.75 0.88 758
29 20 2.37 1.80 0.76 729 2.21 1.68 0.76 765 2.13 1.62 0.76 787
29 22 2.51 1.60 0.64 758 2.35 1.50 0.64 801 2.27 1.45 0.64 815
29 24 2.65 1.38 0.52 787 2.48 1.29 0.52 822 2.42 1.26 0.52 840
29 26 2.78 1.11 0.40 815 2.62 1.05 0.40 851 2.54 1.02 0.40 869
30 18 2.25 2.07 0.92 701 2.07 1.90 0.92 744 1.99 1.83 0.92 758
30 20 2.37 1.90 0.80 729 2.21 1.77 0.80 765 2.13 1.70 0.80 787
30 22 2.51 1.70 0.68 758 2.35 1.60 0.68 801 2.27 1.54 0.68 815
30 24 2.65 1.48 0.56 787 2.48 1.39 0.56 822 2.42 1.35 0.56 840
30 26 2.78 1.22 0.44 815 2.62 1.15 0.44 851 2.54 1.12 0.44 869
31 18 2.25 2.16 0.96 701 2.07 1.99 0.96 744 1.99 1.91 0.96 758
31 20 2.37 1.99 0.84 729 2.21 1.85 0.84 765 2.13 1.79 0.84 787
31 22 2.51 1.81 0.72 758 2.35 1.69 0.72 801 2.27 1.63 0.72 815
31 24 2.65 1.59 0.60 787 2.48 1.49 0.60 822 2.42 1.45 0.60 840
31 26 2.78 1.34 0.48 815 2.62 1.26 0.48 851 2.54 1.22 0.48 869
32 18 2.25 2.25 1.00 701 2.07 2.07 1.00 744 1.99 1.99 1.00 758
32 20 2.37 2.08 0.88 729 2.21 1.94 0.88 765 2.13 1.87 0.88 787
32 22 2.51 1.91 0.76 758 2.35 1.78 0.76 801 2.27 1.72 0.76 815
32 24 2.65 1.69 0.64 787 2.48 1.59 0.64 822 2.42 1.55 0.64 840
32 26 2.78 1.45 0.52 815 2.62 1.36 0.52 851 2.54 1.32 0.52 869

INDOOR

DB(:)

INDOOR

WB(:)

OUTDOOR DB(:)

35 4340

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

CAPACITY : 2.3(KW) SHF : 0.74 INPUT : 715(W)

COOL operation (230V)

MSC-A07YV - : MUH-A07YV -

E1E1

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

PERFORMANCE DATA

21 18 3.00 1.56 0.52 636 2.87 1.49 0.52 668 2.75 1.43 0.52 700 2.65 1.38 0.52 731
21 20 3.12 1.25 0.40 668 3.00 1.20 0.40 708 2.91 1.16 0.40 723 2.81 1.12 0.40 755
22 18 3.00 1.68 0.56 636 2.87 1.61 0.56 668 2.75 1.54 0.56 700 2.65 1.49 0.56 731
22 20 3.12 1.37 0.44 668 3.00 1.32 0.44 708 2.91 1.28 0.44 723 2.81 1.23 0.44 755
22 22 3.25 1.04 0.32 692 3.14 1.00 0.32 735 3.06 0.98 0.32 755 2.93 0.94 0.32 787
23 18 3.00 1.80 0.60 636 2.87 1.72 0.60 668 2.75 1.65 0.60 700 2.65 1.59 0.60 731
23 20 3.12 1.50 0.48 668 3.00 1.44 0.48 708 2.91 1.40 0.48 723 2.81 1.35 0.48 755
23 22 3.25 1.17 0.36 692 3.14 1.13 0.36 735 3.06 1.10 0.36 755 2.93 1.06 0.36 787
24 18 3.00 1.92 0.64 636 2.87 1.84 0.64 668 2.75 1.76 0.64 700 2.65 1.70 0.64 731
24 20 3.12 1.62 0.52 668 3.00 1.56 0.52 708 2.91 1.51 0.52 723 2.81 1.46 0.52 755
24 22 3.25 1.30 0.40 692 3.14 1.25 0.40 735 3.06 1.22 0.40 755 2.93 1.17 0.40 787
24 24 3.42 0.96 0.28 723 3.29 0.92 0.28 763 3.21 0.90 0.28 787 3.11 0.87 0.28 827
25 18 3.00 2.04 0.68 636 2.87 1.95 0.68 668 2.75 1.87 0.68 700 2.65 1.80 0.68 731
25 20 3.12 1.75 0.56 668 3.00 1.68 0.56 708 2.91 1.63 0.56 723 2.81 1.57 0.56 755
25 22 3.25 1.43 0.44 692 3.14 1.38 0.44 735 3.06 1.35 0.44 755 2.93 1.29 0.44 787
25 24 3.42 1.09 0.32 723 3.29 1.05 0.32 763 3.21 1.03 0.32 787 3.11 1.00 0.32 827
26 18 3.00 2.16 0.72 636 2.87 2.07 0.72 668 2.75 1.98 0.72 700 2.65 1.91 0.72 731
26 20 3.12 1.87 0.60 668 3.00 1.80 0.60 708 2.91 1.74 0.60 723 2.81 1.68 0.60 755
26 22 3.25 1.56 0.48 692 3.14 1.51 0.48 735 3.06 1.47 0.48 755 2.93 1.41 0.48 787
26 24 3.42 1.23 0.36 723 3.29 1.18 0.36 763 3.21 1.16 0.36 787 3.11 1.12 0.36 827
26 26 3.52 0.84 0.24 763 3.42 0.82 0.24 803 3.37 0.81 0.24 827 3.26 0.78 0.24 851
27 18 3.00 2.28 0.76 636 2.87 2.18 0.76 668 2.75 2.09 0.76 700 2.65 2.02 0.76 731
27 20 3.12 2.00 0.64 668 3.00 1.92 0.64 708 2.91 1.86 0.64 723 2.81 1.80 0.64 755
27 22 3.25 1.69 0.52 692 3.14 1.63 0.52 735 3.06 1.59 0.52 755 2.93 1.52 0.52 787
27 24 3.42 1.37 0.40 723 3.29 1.32 0.40 763 3.21 1.29 0.40 787 3.11 1.24 0.40 827
27 26 3.52 0.99 0.28 763 3.42 0.96 0.28 803 3.37 0.94 0.28 827 3.26 0.91 0.28 851
28 18 3.00 2.40 0.80 636 2.87 2.30 0.80 668 2.75 2.20 0.80 700 2.65 2.12 0.80 731
28 20 3.12 2.12 0.68 668 3.00 2.04 0.68 708 2.91 1.98 0.68 723 2.81 1.91 0.68 755
28 22 3.25 1.82 0.56 692 3.14 1.76 0.56 735 3.06 1.71 0.56 755 2.93 1.64 0.56 787
28 24 3.42 1.50 0.44 723 3.29 1.45 0.44 763 3.21 1.41 0.44 787 3.11 1.37 0.44 827
28 26 3.52 1.13 0.32 763 3.42 1.09 0.32 803 3.37 1.08 0.32 827 3.26 1.04 0.32 851
29 18 3.00 2.52 0.84 636 2.87 2.41 0.84 668 2.75 2.31 0.84 700 2.65 2.23 0.84 731
29 20 3.12 2.25 0.72 668 3.00 2.16 0.72 708 2.91 2.09 0.72 723 2.81 2.02 0.72 755
29 22 3.25 1.95 0.60 692 3.14 1.88 0.60 735 3.06 1.84 0.60 755 2.93 1.76 0.60 787
29 24 3.42 1.64 0.48 723 3.29 1.58 0.48 763 3.21 1.54 0.48 787 3.11 1.49 0.48 827
29 26 3.52 1.27 0.36 763 3.42 1.23 0.36 803 3.37 1.21 0.36 827 3.26 1.18 0.36 851
30 18 3.00 2.64 0.88 636 2.87 2.52 0.88 668 2.75 2.42 0.88 700 2.65 2.33 0.88 731
30 20 3.12 2.37 0.76 668 3.00 2.28 0.76 708 2.91 2.21 0.76 723 2.81 2.13 0.76 755
30 22 3.25 2.08 0.64 692 3.14 2.01 0.64 735 3.06 1.96 0.64 755 2.93 1.88 0.64 787
30 24 3.42 1.78 0.52 723 3.29 1.71 0.52 763 3.21 1.67 0.52 787 3.11 1.62 0.52 827
30 26 3.52 1.41 0.40 763 3.42 1.37 0.40 803 3.37 1.35 0.40 827 3.26 1.31 0.40 851
31 18 3.00 2.76 0.92 636 2.87 2.64 0.92 668 2.75 2.53 0.92 700 2.65 2.44 0.92 731
31 20 3.12 2.50 0.80 668 3.00 2.40 0.80 708 2.91 2.33 0.80 723 2.81 2.24 0.80 755
31 22 3.25 2.21 0.68 692 3.14 2.13 0.68 735 3.06 2.08 0.68 755 2.93 1.99 0.68 787
31 24 3.42 1.91 0.56 723 3.29 1.84 0.56 763 3.21 1.80 0.56 787 3.11 1.74 0.56 827
31 26 3.52 1.55 0.44 763 3.42 1.50 0.44 803 3.37 1.48 0.44 827 3.26 1.44 0.44 851
32 18 3.00 2.88 0.96 636 2.87 2.75 0.96 668 2.75 2.64 0.96 700 2.65 2.55 0.96 731
32 20 3.12 2.62 0.84 668 3.00 2.52 0.84 708 2.91 2.44 0.84 723 2.81 2.36 0.84 755
32 22 3.25 2.34 0.72 692 3.14 2.26 0.72 735 3.06 2.20 0.72 755 2.93 2.11 0.72 787
32 24 3.42 2.05 0.60 723 3.29 1.97 0.60 763 3.21 1.93 0.60 787 3.11 1.87 0.60 827
32 26 3.52 1.69 0.48 763 3.42 1.64 0.48 803 3.37 1.62 0.48 827 3.26 1.57 0.48 851

INDOOR

DB(:)

INDOOR

WB(:)

OUTDOOR DB(:)

21 2725

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT30Q SHC SHF INPUT

CAPACITY : 2.55(KW) SHF : 0.70 INPUT : 795(W)

COOL operation (230V)

MSC-A09YV - : MUH-A09YV -

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

E1E1

15

PERFORMANCE DATA

21 18 2.50 1.30 0.52 779 2.30 1.19 0.52 827 2.21 1.15 0.52 843
21 20 2.63 1.05 0.40 811 2.45 0.98 0.40 851 2.36 0.94 0.40 875
22 18 2.50 1.40 0.56 779 2.30 1.29 0.56 827 2.21 1.24 0.56 843
22 20 2.63 1.16 0.44 811 2.45 1.08 0.44 851 2.36 1.04 0.44 875
22 22 2.78 0.89 0.32 843 2.60 0.83 0.32 890 2.51 0.80 0.32 906
23 18 2.50 1.50 0.60 779 2.30 1.38 0.60 827 2.21 1.32 0.60 843
23 20 2.63 1.26 0.48 811 2.45 1.18 0.48 851 2.36 1.13 0.48 875
23 22 2.78 1.00 0.36 843 2.60 0.94 0.36 890 2.51 0.90 0.36 906
24 18 2.50 1.60 0.64 779 2.30 1.47 0.64 827 2.21 1.41 0.64 843
24 20 2.63 1.37 0.52 811 2.45 1.27 0.52 851 2.36 1.23 0.52 875
24 22 2.78 1.11 0.40 843 2.60 1.04 0.40 890 2.51 1.00 0.40 906
24 24 2.93 0.82 0.28 875 2.75 0.77 0.28 914 2.68 0.75 0.28 934
25 18 2.50 1.70 0.68 779 2.30 1.56 0.68 827 2.21 1.50 0.68 843
25 20 2.63 1.47 0.56 811 2.45 1.37 0.56 851 2.36 1.32 0.56 875
25 22 2.78 1.22 0.44 843 2.60 1.14 0.44 890 2.51 1.11 0.44 906
25 24 2.93 0.94 0.32 875 2.75 0.88 0.32 914 2.68 0.86 0.32 934
26 18 2.50 1.80 0.72 779 2.30 1.65 0.72 827 2.21 1.59 0.72 843
26 20 2.63 1.58 0.60 811 2.45 1.47 0.60 851 2.36 1.42 0.60 875
26 22 2.78 1.33 0.48 843 2.60 1.25 0.48 890 2.51 1.21 0.48 906
26 24 2.93 1.06 0.36 875 2.75 0.99 0.36 914 2.68 0.96 0.36 934
26 26 3.09 0.74 0.24 906 2.91 0.70 0.24 946 2.82 0.68 0.24 966
27 18 2.50 1.90 0.76 779 2.30 1.74 0.76 827 2.21 1.68 0.76 843
27 20 2.63 1.68 0.64 811 2.45 1.57 0.64 851 2.36 1.51 0.64 875
27 22 2.78 1.45 0.52 843 2.60 1.35 0.52 890 2.51 1.31 0.52 906
27 24 2.93 1.17 0.40 875 2.75 1.10 0.40 914 2.68 1.07 0.40 934
27 26 3.09 0.86 0.28 906 2.91 0.81 0.28 946 2.82 0.79 0.28 966
28 18 2.50 2.00 0.80 779 2.30 1.84 0.80 827 2.21 1.76 0.80 843
28 20 2.63 1.79 0.68 811 2.45 1.66 0.68 851 2.36 1.60 0.68 875
28 22 2.78 1.56 0.56 843 2.60 1.46 0.56 890 2.51 1.41 0.56 906
28 24 2.93 1.29 0.44 875 2.75 1.21 0.44 914 2.68 1.18 0.44 934
28 26 3.09 0.99 0.32 906 2.91 0.93 0.32 946 2.82 0.90 0.32 966
29 18 2.50 2.10 0.84 779 2.30 1.93 0.84 827 2.21 1.85 0.84 843
29 20 2.63 1.89 0.72 811 2.45 1.76 0.72 851 2.36 1.70 0.72 875
29 22 2.78 1.67 0.60 843 2.60 1.56 0.60 890 2.51 1.51 0.60 906
29 24 2.93 1.41 0.48 875 2.75 1.32 0.48 914 2.68 1.29 0.48 934
29 26 3.09 1.11 0.36 906 2.91 1.05 0.36 946 2.82 1.01 0.36 966
30 18 2.50 2.20 0.88 779 2.30 2.02 0.88 827 2.21 1.94 0.88 843
30 20 2.63 2.00 0.76 811 2.45 1.86 0.76 851 2.36 1.79 0.76 875
30 22 2.78 1.78 0.64 843 2.60 1.66 0.64 890 2.51 1.61 0.64 906
30 24 2.93 1.52 0.52 875 2.75 1.43 0.52 914 2.68 1.39 0.52 934
30 26 3.09 1.23 0.40 906 2.91 1.16 0.40 946 2.82 1.13 0.40 966
31 18 2.50 2.30 0.92 779 2.30 2.11 0.92 827 2.21 2.03 0.92 843
31 20 2.63 2.10 0.80 811 2.45 1.96 0.80 851 2.36 1.89 0.80 875
31 22 2.78 1.89 0.68 843 2.60 1.77 0.68 890 2.51 1.71 0.68 906
31 24 2.93 1.64 0.56 875 2.75 1.54 0.56 914 2.68 1.50 0.56 934
31 26 3.09 1.36 0.44 906 2.91 1.28 0.44 946 2.82 1.24 0.44 966
32 18 2.50 2.40 0.96 779 2.30 2.20 0.96 827 2.21 2.12 0.96 843
32 20 2.63 2.21 0.84 811 2.45 2.06 0.84 851 2.36 1.98 0.84 875
32 22 2.78 2.00 0.72 843 2.60 1.87 0.72 890 2.51 1.81 0.72 906
32 24 2.93 1.76 0.60 875 2.75 1.65 0.60 914 2.68 1.61 0.60 934
32 26 3.09 1.48 0.48 906 2.91 1.40 0.48 946 2.82 1.35 0.48 966

INDOOR

DB(:)

INDOOR

WB(:)

OUTDOOR DB(:)

35 4340

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

CAPACITY : 2.55(KW) SHF : 0.70 INPUT : 795(W)

COOL operation (230V)

MSC-A09YV - : MUH-A09YV -

E1E1

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

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

16

PERFORMANCE DATA

21 18 4.11 1.97 0.48 872 3.94 1.89 0.48 916 3.78 1.81 0.48 959 3.64 1.75 0.48 1003
21 20 4.29 1.54 0.36 916 4.11 1.48 0.36 970 3.99 1.44 0.36 992 3.85 1.39 0.36 1036
22 18 4.11 2.14 0.52 872 3.94 2.05 0.52 916 3.78 1.97 0.52 959 3.64 1.89 0.52 1003
22 20 4.29 1.72 0.40 916 4.11 1.65 0.40 970 3.99 1.60 0.40 992 3.85 1.54 0.40 1036
22 22 4.46 1.25 0.28 948 4.31 1.21 0.28 1008 4.20 1.18 0.28 1036 4.03 1.13 0.28 1079
23 18 4.11 2.30 0.56 872 3.94 2.21 0.56 916 3.78 2.12 0.56 959 3.64 2.04 0.56 1003
23 20 4.29 1.89 0.44 916 4.11 1.81 0.44 970 3.99 1.76 0.44 992 3.85 1.69 0.44 1036
23 22 4.46 1.43 0.32 948 4.31 1.38 0.32 1008 4.20 1.34 0.32 1036 4.03 1.29 0.32 1079
24 18 4.11 2.47 0.60 872 3.94 2.36 0.60 916 3.78 2.27 0.60 959 3.64 2.18 0.60 1003
24 20 4.29 2.06 0.48 916 4.11 1.97 0.48 970 3.99 1.92 0.48 992 3.85 1.85 0.48 1036
24 22 4.46 1.61 0.36 948 4.31 1.55 0.36 1008 4.20 1.51 0.36 1036 4.03 1.45 0.36 1079
24 24 4.69 1.13 0.24 992 4.52 1.08 0.24 1046 4.41 1.06 0.24 1079 4.27 1.02 0.24 1134
25 18 4.11 2.63 0.64 872 3.94 2.52 0.64 916 3.78 2.42 0.64 959 3.64 2.33 0.64 1003
25 20 4.29 2.23 0.52 916 4.11 2.14 0.52 970 3.99 2.07 0.52 992 3.85 2.00 0.52 1036
25 22 4.46 1.79 0.40 948 4.31 1.72 0.40 1008 4.20 1.68 0.40 1036 4.03 1.61 0.40 1079
25 24 4.69 1.31 0.28 992 4.52 1.26 0.28 1046 4.41 1.23 0.28 1079 4.27 1.20 0.28 1134
26 18 4.11 2.80 0.68 872 3.94 2.68 0.68 916 3.78 2.57 0.68 959 3.64 2.48 0.68 1003
26 20 4.29 2.40 0.56 916 4.11 2.30 0.56 970 3.99 2.23 0.56 992 3.85 2.16 0.56 1036
26 22 4.46 1.96 0.44 948 4.31 1.89 0.44 1008 4.20 1.85 0.44 1036 4.03 1.77 0.44 1079
26 24 4.69 1.50 0.32 992 4.52 1.44 0.32 1046 4.41 1.41 0.32 1079 4.27 1.37 0.32 1134
26 26 4.83 0.97 0.20 1046 4.69 0.94 0.20 1101 4.62 0.92 0.20 1134 4.48 0.90 0.20 1166
27 18 4.11 2.96 0.72 872 3.94 2.84 0.72 916 3.78 2.72 0.72 959 3.64 2.62 0.72 1003
27 20 4.29 2.57 0.60 916 4.11 2.47 0.60 970 3.99 2.39 0.60 992 3.85 2.31 0.60 1036
27 22 4.46 2.14 0.48 948 4.31 2.07 0.48 1008 4.20 2.02 0.48 1036 4.03 1.93 0.48 1079
27 24 4.69 1.69 0.36 992 4.52 1.63 0.36 1046 4.41 1.59 0.36 1079 4.27 1.54 0.36 1134
27 26 4.83 1.16 0.24 1046 4.69 1.13 0.24 1101 4.62 1.11 0.24 1134 4.48 1.08 0.24 1166
28 18 4.11 3.13 0.76 872 3.94 2.99 0.76 916 3.78 2.87 0.76 959 3.64 2.77 0.76 1003
28 20 4.29 2.74 0.64 916 4.11 2.63 0.64 970 3.99 2.55 0.64 992 3.85 2.46 0.64 1036
28 22 4.46 2.32 0.52 948 4.31 2.24 0.52 1008 4.20 2.18 0.52 1036 4.03 2.09 0.52 1079
28 24 4.69 1.88 0.40 992 4.52 1.81 0.40 1046 4.41 1.76 0.40 1079 4.27 1.71 0.40 1134
28 26 4.83 1.35 0.28 1046 4.69 1.31 0.28 1101 4.62 1.29 0.28 1134 4.48 1.25 0.28 1166
29 18 4.11 3.29 0.80 872 3.94 3.15 0.80 916 3.78 3.02 0.80 959 3.64 2.91 0.80 1003
29 20 4.29 2.92 0.68 916 4.11 2.80 0.68 970 3.99 2.71 0.68 992 3.85 2.62 0.68 1036
29 22 4.46 2.50 0.56 948 4.31 2.41 0.56 1008 4.20 2.35 0.56 1036 4.03 2.25 0.56 1079
29 24 4.69 2.06 0.44 992 4.52 1.99 0.44 1046 4.41 1.94 0.44 1079 4.27 1.88 0.44 1134
29 26 4.83 1.55 0.32 1046 4.69 1.50 0.32 1101 4.62 1.48 0.32 1134 4.48 1.43 0.32 1166
30 18 4.11 3.45 0.84 872 3.94 3.31 0.84 916 3.78 3.18 0.84 959 3.64 3.06 0.84 1003
30 20 4.29 3.09 0.72 916 4.11 2.96 0.72 970 3.99 2.87 0.72 992 3.85 2.77 0.72 1036
30 22 4.46 2.68 0.60 948 4.31 2.58 0.60 1008 4.20 2.52 0.60 1036 4.03 2.42 0.60 1079
30 24 4.69 2.25 0.48 992 4.52 2.17 0.48 1046 4.41 2.12 0.48 1079 4.27 2.05 0.48 1134
30 26 4.83 1.74 0.36 1046 4.69 1.69 0.36 1101 4.62 1.66 0.36 1134 4.48 1.61 0.36 1166
31 18 4.11 3.62 0.88 872 3.94 3.47 0.88 916 3.78 3.33 0.88 959 3.64 3.20 0.88 1003
31 20 4.29 3.26 0.76 916 4.11 3.13 0.76 970 3.99 3.03 0.76 992 3.85 2.93 0.76 1036
31 22 4.46 2.86 0.64 948 4.31 2.76 0.64 1008 4.20 2.69 0.64 1036 4.03 2.58 0.64 1079
31 24 4.69 2.44 0.52 992 4.52 2.35 0.52 1046 4.41 2.29 0.52 1079 4.27 2.22 0.52 1134
31 26 4.83 1.93 0.40 1046 4.69 1.88 0.40 1101 4.62 1.85 0.40 1134 4.48 1.79 0.40 1166
32 18 4.11 3.78 0.92 872 3.94 3.62 0.92 916 3.78 3.48 0.92 959 3.64 3.35 0.92 1003
32 20 4.29 3.43 0.80 916 4.11 3.29 0.80 970 3.99 3.19 0.80 992 3.85 3.08 0.80 1036
32 22 4.46 3.03 0.68 948 4.31 2.93 0.68 1008 4.20 2.86 0.68 1036 4.03 2.74 0.68 1079
32 24 4.69 2.63 0.56 992 4.52 2.53 0.56 1046 4.41 2.47 0.56 1079 4.27 2.39 0.56 1134
32 26 4.83 2.13 0.44 1046 4.69 2.06 0.44 1101 4.62 2.03 0.44 1134 4.48 1.97 0.44 1166

INDOOR

DB(:)

INDOOR

WB(:)

OUTDOOR DB(:)

21 2725

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT30Q SHC SHF INPUT

CAPACITY : 3.5(KW) SHF : 0.66 INPUT : 1090(W)

COOL operation (230V)

MSC-A12YV - : MUH-A12YV -

E1E1

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

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

17

PERFORMANCE DATA

21 18 3.43 1.65 0.48 1068 3.15 1.51 0.48 1134 3.03 1.45 0.48 1155
21 20 3.61 1.30 0.36 1112 3.36 1.21 0.36 1166 3.24 1.17 0.36 1199
22 18 3.43 1.78 0.52 1068 3.15 1.64 0.52 1134 3.03 1.57 0.52 1155
22 20 3.61 1.44 0.40 1112 3.36 1.34 0.40 1166 3.24 1.30 0.40 1199
22 22 3.82 1.07 0.28 1155 3.57 1.00 0.28 1221 3.45 0.97 0.28 1243
23 18 3.43 1.92 0.56 1068 3.15 1.76 0.56 1134 3.03 1.70 0.56 1155
23 20 3.61 1.59 0.44 1112 3.36 1.48 0.44 1166 3.24 1.42 0.44 1199
23 22 3.82 1.22 0.32 1155 3.57 1.14 0.32 1221 3.45 1.10 0.32 1243
24 18 3.43 2.06 0.60 1068 3.15 1.89 0.60 1134 3.03 1.82 0.60 1155
24 20 3.61 1.73 0.48 1112 3.36 1.61 0.48 1166 3.24 1.55 0.48 1199
24 22 3.82 1.37 0.36 1155 3.57 1.29 0.36 1221 3.45 1.24 0.36 1243
24 24 4.03 0.97 0.24 1199 3.78 0.91 0.24 1254 3.68 0.88 0.24 1281
25 18 3.43 2.20 0.64 1068 3.15 2.02 0.64 1134 3.03 1.94 0.64 1155
25 20 3.61 1.87 0.52 1112 3.36 1.75 0.52 1166 3.24 1.68 0.52 1199
25 22 3.82 1.53 0.40 1155 3.57 1.43 0.40 1221 3.45 1.38 0.40 1243
25 24 4.03 1.13 0.28 1199 3.78 1.06 0.28 1254 3.68 1.03 0.28 1281
26 18 3.43 2.33 0.68 1068 3.15 2.14 0.68 1134 3.03 2.06 0.68 1155
26 20 3.61 2.02 0.56 1112 3.36 1.88 0.56 1166 3.24 1.81 0.56 1199
26 22 3.82 1.68 0.44 1155 3.57 1.57 0.44 1221 3.45 1.52 0.44 1243
26 24 4.03 1.29 0.32 1199 3.78 1.21 0.32 1254 3.68 1.18 0.32 1281
26 26 4.24 0.85 0.20 1243 3.99 0.80 0.20 1297 3.87 0.77 0.20 1324
27 18 3.43 2.47 0.72 1068 3.15 2.27 0.72 1134 3.03 2.18 0.72 1155
27 20 3.61 2.16 0.60 1112 3.36 2.02 0.60 1166 3.24 1.94 0.60 1199
27 22 3.82 1.83 0.48 1155 3.57 1.71 0.48 1221 3.45 1.65 0.48 1243
27 24 4.03 1.45 0.36 1199 3.78 1.36 0.36 1254 3.68 1.32 0.36 1281
27 26 4.24 1.02 0.24 1243 3.99 0.96 0.24 1297 3.87 0.93 0.24 1324
28 18 3.43 2.61 0.76 1068 3.15 2.39 0.76 1134 3.03 2.30 0.76 1155
28 20 3.61 2.31 0.64 1112 3.36 2.15 0.64 1166 3.24 2.07 0.64 1199
28 22 3.82 1.98 0.52 1155 3.57 1.86 0.52 1221 3.45 1.79 0.52 1243
28 24 4.03 1.61 0.40 1199 3.78 1.51 0.40 1254 3.68 1.47 0.40 1281
28 26 4.24 1.19 0.28 1243 3.99 1.12 0.28 1297 3.87 1.08 0.28 1324
29 18 3.43 2.74 0.80 1068 3.15 2.52 0.80 1134 3.03 2.42 0.80 1155
29 20 3.61 2.45 0.68 1112 3.36 2.28 0.68 1166 3.24 2.20 0.68 1199
29 22 3.82 2.14 0.56 1155 3.57 2.00 0.56 1221 3.45 1.93 0.56 1243
29 24 4.03 1.77 0.44 1199 3.78 1.66 0.44 1254 3.68 1.62 0.44 1281
29 26 4.24 1.36 0.32 1243 3.99 1.28 0.32 1297 3.87 1.24 0.32 1324
30 18 3.43 2.88 0.84 1068 3.15 2.65 0.84 1134 3.03 2.54 0.84 1155
30 20 3.61 2.60 0.72 1112 3.36 2.42 0.72 1166 3.24 2.33 0.72 1199
30 22 3.82 2.29 0.60 1155 3.57 2.14 0.60 1221 3.45 2.07 0.60 1243
30 24 4.03 1.93 0.48 1199 3.78 1.81 0.48 1254 3.68 1.76 0.48 1281
30 26 4.24 1.52 0.36 1243 3.99 1.44 0.36 1297 3.87 1.39 0.36 1324
31 18 3.43 3.02 0.88 1068 3.15 2.77 0.88 1134 3.03 2.66 0.88 1155
31 20 3.61 2.74 0.76 1112 3.36 2.55 0.76 1166 3.24 2.46 0.76 1199
31 22 3.82 2.44 0.64 1155 3.57 2.28 0.64 1221 3.45 2.21 0.64 1243
31 24 4.03 2.09 0.52 1199 3.78 1.97 0.52 1254 3.68 1.91 0.52 1281
31 26 4.24 1.69 0.40 1243 3.99 1.60 0.40 1297 3.87 1.55 0.40 1324
32 18 3.43 3.16 0.92 1068 3.15 2.90 0.92 1134 3.03 2.79 0.92 1155
32 20 3.61 2.88 0.80 1112 3.36 2.69 0.80 1166 3.24 2.59 0.80 1199
32 22 3.82 2.59 0.68 1155 3.57 2.43 0.68 1221 3.45 2.34 0.68 1243
32 24 4.03 2.25 0.56 1199 3.78 2.12 0.56 1254 3.68 2.06 0.56 1281
32 26 4.24 1.86 0.44 1243 3.99 1.76 0.44 1297 3.87 1.70 0.44 1324

INDOOR

DB(:)

INDOOR

WB(:)

OUTDOOR DB(:)

35 4340

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

CAPACITY : 3.5(KW) SHF : 0.66 INPUT : 1090(W)

COOL operation (230V)

MSC-A12YV - : MUH-A12YV -

E1E1

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

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

18

PERFORMANCE DATA

21 18 4.11 2.14 0.52 928 3.94 2.05 0.52 974 3.78 1.97 0.52 1021 3.64 1.89 0.52 1067
21 20 4.29 1.72 0.40 974 4.11 1.65 0.40 1032 3.99 1.60 0.40 1056 3.85 1.54 0.40 1102
22 18 4.11 2.30 0.56 928 3.94 2.21 0.56 974 3.78 2.12 0.56 1021 3.64 2.04 0.56 1067
22 20 4.29 1.89 0.44 974 4.11 1.81 0.44 1032 3.99 1.76 0.44 1056 3.85 1.69 0.44 1102
22 22 4.46 1.43 0.32 1009 4.31 1.38 0.32 1073 4.20 1.34 0.32 1102 4.03 1.29 0.32 1148
23 18 4.11 2.47 0.60 928 3.94 2.36 0.60 974 3.78 2.27 0.60 1021 3.64 2.18 0.60 1067
23 20 4.29 2.06 0.48 974 4.11 1.97 0.48 1032 3.99 1.92 0.48 1056 3.85 1.85 0.48 1102
23 22 4.46 1.61 0.36 1009 4.31 1.55 0.36 1073 4.20 1.51 0.36 1102 4.03 1.45 0.36 1148
24 18 4.11 2.63 0.64 928 3.94 2.52 0.64 974 3.78 2.42 0.64 1021 3.64 2.33 0.64 1067
24 20 4.29 2.23 0.52 974 4.11 2.14 0.52 1032 3.99 2.07 0.52 1056 3.85 2.00 0.52 1102
24 22 4.46 1.79 0.40 1009 4.31 1.72 0.40 1073 4.20 1.68 0.40 1102 4.03 1.61 0.40 1148
24 24 4.69 1.31 0.28 1056 4.52 1.26 0.28 1114 4.41 1.23 0.28 1148 4.27 1.20 0.28 1206
25 18 4.11 2.80 0.68 928 3.94 2.68 0.68 974 3.78 2.57 0.68 1021 3.64 2.48 0.68 1067
25 20 4.29 2.40 0.56 974 4.11 2.30 0.56 1032 3.99 2.23 0.56 1056 3.85 2.16 0.56 1102
25 22 4.46 1.96 0.44 1009 4.31 1.89 0.44 1073 4.20 1.85 0.44 1102 4.03 1.77 0.44 1148
25 24 4.69 1.50 0.32 1056 4.52 1.44 0.32 1114 4.41 1.41 0.32 1148 4.27 1.37 0.32 1206
26 18 4.11 2.96 0.72 928 3.94 2.84 0.72 974 3.78 2.72 0.72 1021 3.64 2.62 0.72 1067
26 20 4.29 2.57 0.60 974 4.11 2.47 0.60 1032 3.99 2.39 0.60 1056 3.85 2.31 0.60 1102
26 22 4.46 2.14 0.48 1009 4.31 2.07 0.48 1073 4.20 2.02 0.48 1102 4.03 1.93 0.48 1148
26 24 4.69 1.69 0.36 1056 4.52 1.63 0.36 1114 4.41 1.59 0.36 1148 4.27 1.54 0.36 1206
26 26 4.83 1.16 0.24 1114 4.69 1.13 0.24 1172 4.62 1.11 0.24 1206 4.48 1.08 0.24 1241
27 18 4.11 3.13 0.76 928 3.94 2.99 0.76 974 3.78 2.87 0.76 1021 3.64 2.77 0.76 1067
27 20 4.29 2.74 0.64 974 4.11 2.63 0.64 1032 3.99 2.55 0.64 1056 3.85 2.46 0.64 1102
27 22 4.46 2.32 0.52 1009 4.31 2.24 0.52 1073 4.20 2.18 0.52 1102 4.03 2.09 0.52 1148
27 24 4.69 1.88 0.40 1056 4.52 1.81 0.40 1114 4.41 1.76 0.40 1148 4.27 1.71 0.40 1206
27 26 4.83 1.35 0.28 1114 4.69 1.31 0.28 1172 4.62 1.29 0.28 1206 4.48 1.25 0.28 1241
28 18 4.11 3.29 0.80 928 3.94 3.15 0.80 974 3.78 3.02 0.80 1021 3.64 2.91 0.80 1067
28 20 4.29 2.92 0.68 974 4.11 2.80 0.68 1032 3.99 2.71 0.68 1056 3.85 2.62 0.68 1102
28 22 4.46 2.50 0.56 1009 4.31 2.41 0.56 1073 4.20 2.35 0.56 1102 4.03 2.25 0.56 1148
28 24 4.69 2.06 0.44 1056 4.52 1.99 0.44 1114 4.41 1.94 0.44 1148 4.27 1.88 0.44 1206
28 26 4.83 1.55 0.32 1114 4.69 1.50 0.32 1172 4.62 1.48 0.32 1206 4.48 1.43 0.32 1241
29 18 4.11 3.45 0.84 928 3.94 3.31 0.84 974 3.78 3.18 0.84 1021 3.64 3.06 0.84 1067
29 20 4.29 3.09 0.72 974 4.11 2.96 0.72 1032 3.99 2.87 0.72 1056 3.85 2.77 0.72 1102
29 22 4.46 2.68 0.60 1009 4.31 2.58 0.60 1073 4.20 2.52 0.60 1102 4.03 2.42 0.60 1148
29 24 4.69 2.25 0.48 1056 4.52 2.17 0.48 1114 4.41 2.12 0.48 1148 4.27 2.05 0.48 1206
29 26 4.83 1.74 0.36 1114 4.69 1.69 0.36 1172 4.62 1.66 0.36 1206 4.48 1.61 0.36 1241
30 18 4.11 3.62 0.88 928 3.94 3.47 0.88 974 3.78 3.33 0.88 1021 3.64 3.20 0.88 1067
30 20 4.29 3.26 0.76 974 4.11 3.13 0.76 1032 3.99 3.03 0.76 1056 3.85 2.93 0.76 1102
30 22 4.46 2.86 0.64 1009 4.31 2.76 0.64 1073 4.20 2.69 0.64 1102 4.03 2.58 0.64 1148
30 24 4.69 2.44 0.52 1056 4.52 2.35 0.52 1114 4.41 2.29 0.52 1148 4.27 2.22 0.52 1206
30 26 4.83 1.93 0.40 1114 4.69 1.88 0.40 1172 4.62 1.85 0.40 1206 4.48 1.79 0.40 1241
31 18 4.11 3.78 0.92 928 3.94 3.62 0.92 974 3.78 3.48 0.92 1021 3.64 3.35 0.92 1067
31 20 4.29 3.43 0.80 974 4.11 3.29 0.80 1032 3.99 3.19 0.80 1056 3.85 3.08 0.80 1102
31 22 4.46 3.03 0.68 1009 4.31 2.93 0.68 1073 4.20 2.86 0.68 1102 4.03 2.74 0.68 1148
31 24 4.69 2.63 0.56 1056 4.52 2.53 0.56 1114 4.41 2.47 0.56 1148 4.27 2.39 0.56 1206
31 26 4.83 2.13 0.44 1114 4.69 2.06 0.44 1172 4.62 2.03 0.44 1206 4.48 1.97 0.44 1241
32 18 4.11 3.95 0.96 928 3.94 3.78 0.96 974 3.78 3.63 0.96 1021 3.64 3.49 0.96 1067
32 20 4.29 3.60 0.84 974 4.11 3.45 0.84 1032 3.99 3.35 0.84 1056 3.85 3.23 0.84 1102
32 22 4.46 3.21 0.72 1009 4.31 3.10 0.72 1073 4.20 3.02 0.72 1102 4.03 2.90 0.72 1148
32 24 4.69 2.81 0.60 1056 4.52 2.71 0.60 1114 4.41 2.65 0.60 1148 4.27 2.56 0.60 1206
32 26 4.83 2.32 0.48 1114 4.69 2.25 0.48 1172 4.62 2.22 0.48 1206 4.48 2.15 0.48 1241

CAPACITY :3.5(KW) SHF :0.70 INPUT :1160(W)

OUTDOOR DB(:)

INDOOR INDOOR

21 25 27 30

DB(:) WB(:)

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

COOL operation (230V)

MCFH-A12WV - : MUH-A12YV -

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

E1E1

19

PERFORMANCE DATA

21 18 3.43 1.78 0.52 1137 3.15 1.64 0.52 1206 3.03 1.57 0.52 1230
21 20 3.61 1.44 0.40 1183 3.36 1.34 0.40 1241 3.24 1.30 0.40 1276
22 18 3.43 1.92 0.56 1137 3.15 1.76 0.56 1206 3.03 1.70 0.56 1230
22 20 3.61 1.59 0.44 1183 3.36 1.48 0.44 1241 3.24 1.42 0.44 1276
22 22 3.82 1.22 0.32 1230 3.57 1.14 0.32 1299 3.45 1.10 0.32 1322
23 18 3.43 2.06 0.60 1137 3.15 1.89 0.60 1206 3.03 1.82 0.60 1230
23 20 3.61 1.73 0.48 1183 3.36 1.61 0.48 1241 3.24 1.55 0.48 1276
23 22 3.82 1.37 0.36 1230 3.57 1.29 0.36 1299 3.45 1.24 0.36 1322
24 18 3.43 2.20 0.64 1137 3.15 2.02 0.64 1206 3.03 1.94 0.64 1230
24 20 3.61 1.87 0.52 1183 3.36 1.75 0.52 1241 3.24 1.68 0.52 1276
24 22 3.82 1.53 0.40 1230 3.57 1.43 0.40 1299 3.45 1.38 0.40 1322
24 24 4.03 1.13 0.28 1276 3.78 1.06 0.28 1334 3.68 1.03 0.28 1363
25 18 3.43 2.33 0.68 1137 3.15 2.14 0.68 1206 3.03 2.06 0.68 1230
25 20 3.61 2.02 0.56 1183 3.36 1.88 0.56 1241 3.24 1.81 0.56 1276
25 22 3.82 1.68 0.44 1230 3.57 1.57 0.44 1299 3.45 1.52 0.44 1322
25 24 4.03 1.29 0.32 1276 3.78 1.21 0.32 1334 3.68 1.18 0.32 1363
26 18 3.43 2.47 0.72 1137 3.15 2.27 0.72 1206 3.03 2.18 0.72 1230
26 20 3.61 2.16 0.60 1183 3.36 2.02 0.60 1241 3.24 1.94 0.60 1276
26 22 3.82 1.83 0.48 1230 3.57 1.71 0.48 1299 3.45 1.65 0.48 1322
26 24 4.03 1.45 0.36 1276 3.78 1.36 0.36 1334 3.68 1.32 0.36 1363
26 26 4.24 1.02 0.24 1322 3.99 0.96 0.24 1380 3.87 0.93 0.24 1409
27 18 3.43 2.61 0.76 1137 3.15 2.39 0.76 1206 3.03 2.30 0.76 1230
27 20 3.61 2.31 0.64 1183 3.36 2.15 0.64 1241 3.24 2.07 0.64 1276
27 22 3.82 1.98 0.52 1230 3.57 1.86 0.52 1299 3.45 1.79 0.52 1322
27 24 4.03 1.61 0.40 1276 3.78 1.51 0.40 1334 3.68 1.47 0.40 1363
27 26 4.24 1.19 0.28 1322 3.99 1.12 0.28 1380 3.87 1.08 0.28 1409
28 18 3.43 2.74 0.80 1137 3.15 2.52 0.80 1206 3.03 2.42 0.80 1230
28 20 3.61 2.45 0.68 1183 3.36 2.28 0.68 1241 3.24 2.20 0.68 1276
28 22 3.82 2.14 0.56 1230 3.57 2.00 0.56 1299 3.45 1.93 0.56 1322
28 24 4.03 1.77 0.44 1276 3.78 1.66 0.44 1334 3.68 1.62 0.44 1363
28 26 4.24 1.36 0.32 1322 3.99 1.28 0.32 1380 3.87 1.24 0.32 1409
29 18 3.43 2.88 0.84 1137 3.15 2.65 0.84 1206 3.03 2.54 0.84 1230
29 20 3.61 2.60 0.72 1183 3.36 2.42 0.72 1241 3.24 2.33 0.72 1276
29 22 3.82 2.29 0.60 1230 3.57 2.14 0.60 1299 3.45 2.07 0.60 1322
29 24 4.03 1.93 0.48 1276 3.78 1.81 0.48 1334 3.68 1.76 0.48 1363
29 26 4.24 1.52 0.36 1322 3.99 1.44 0.36 1380 3.87 1.39 0.36 1409
30 18 3.43 3.02 0.88 1137 3.15 2.77 0.88 1206 3.03 2.66 0.88 1230
30 20 3.61 2.74 0.76 1183 3.36 2.55 0.76 1241 3.24 2.46 0.76 1276
30 22 3.82 2.44 0.64 1230 3.57 2.28 0.64 1299 3.45 2.21 0.64 1322
30 24 4.03 2.09 0.52 1276 3.78 1.97 0.52 1334 3.68 1.91 0.52 1363
30 26 4.24 1.69 0.40 1322 3.99 1.60 0.40 1380 3.87 1.55 0.40 1409
31 18 3.43 3.16 0.92 1137 3.15 2.90 0.92 1206 3.03 2.79 0.92 1230
31 20 3.61 2.88 0.80 1183 3.36 2.69 0.80 1241 3.24 2.59 0.80 1276
31 22 3.82 2.59 0.68 1230 3.57 2.43 0.68 1299 3.45 2.34 0.68 1322
31 24 4.03 2.25 0.56 1276 3.78 2.12 0.56 1334 3.68 2.06 0.56 1363
31 26 4.24 1.86 0.44 1322 3.99 1.76 0.44 1380 3.87 1.70 0.44 1409
32 18 3.43 3.29 0.96 1137 3.15 3.02 0.96 1206 3.03 2.91 0.96 1230
32 20 3.61 3.03 0.84 1183 3.36 2.82 0.84 1241 3.24 2.72 0.84 1276
32 22 3.82 2.75 0.72 1230 3.57 2.57 0.72 1299 3.45 2.48 0.72 1322
32 24 4.03 2.42 0.60 1276 3.78 2.27 0.60 1334 3.68 2.21 0.60 1363
32 26 4.24 2.03 0.48 1322 3.99 1.92 0.48 1380 3.87 1.86 0.48 1409

CAPACITY :3.5(KW) SHF :0.70 INPUT :1160(W)

OUTDOOR DB(:)

INDOOR INDOOR

35 40 43

DB(:) WB(:)

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

COOL operation (230V)

MCFH-A12WV - : MUH-A12YV -

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

E1E1

20

PERFORMANCE DATA
HEAT operation (230V)

MSC-A07YV - : MUH-A07YV -

CAPACITY : 2.5(KW)

INDOOR

DB(:)

15
21
26

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

1.58

1.50

1.35

INPUT : 690(W)

-10 -5 0 5 10 15 20

449
483
518

1.90

1.80

1.68

538
573
607

E1E1

2.23

2.13

1.98

OUTDOOR WB(:)

607
635
669

2.55

2.43

2.30

656
683
718

2.88

2.75

2.63

697
718
752

3.18

3.05

2.93

718
738
773

3.50

3.36

3.25

731
766
794

MSC-A09YV - : MUH-A09YV -

CAPACITY : 3.05(KW)

INDOOR

DB(:)

15
21
26

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

1.92

1.83

1.65

INPUT : 840(W)

2.32

546

2.20

588

2.04

630

655
697
739

MSC-A12YV - : MUH-A12YV -

CAPACITY : 3.9(KW)

INDOOR

DB(:)

15
21
26

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

2.46

2.34

2.11

INPUT : 1080(W)

-10 -5 0 5 10 15 20

702
756
810

2.96

2.81

2.61

842
896
950

E1E1

2.71

2.59

2.41

E1E1

3.47

3.32

3.08

MCFH-A12WV - : MUH-A12YV -

CAPACITY : 3.7(KW)

INDOOR

DB(:)

15
21
26

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

2.33

2.22

2.00

INPUT : 1020(W)

-10 -5 0 5 10 15 20

3.29

663
714
765

2.81

2.66

2.48

796
847
898

3.15

2.92

OUTDOOR WB(:)

3.11

739

2.96

773

2.81

815

OUTDOOR WB(:)

1026

3.98

950

1069

3.78

994

1123

1048

E1E1

3.59

OUTDOOR WB(:)

3.77

898

1010

3.59

938

1061

3.40

989

798
832
874

969

3.51

3.36

3.20

4.49

4.29

4.10

4.26

4.07

3.89

848
874
916

1091
1123
1177

1030
1061

1112

3.87

3.72

3.57

4.95

4.76

4.56

4.70

4.51

4.33

874
899
941

1123
1156
1210

1061
1091

1142

4.27

4.10

3.97

5.46

5.25

5.07

5.18

4.98

4.81

890
932
966

1145
1199
1242

1081
1132
1173

NOTE Q:Total capacity (kW) INPUT:Total power input (W) DB:Dry-bulb temperature WB:Wet-bulb temperature

21

High pressure protection

Released

48: 52:

Outdoor fan

OFF
ON

9

MICROPROCESSOR CONTROL

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

E1

E1

E1

9-1. HEAT ( ) OPERATION

1. High pressure protection

During heating operation, the outdoor fan motor is controlled by the temperature of indoor coil thermistor RT12 for excess
rise protection of compressor discharge pressure.
Outdoor fan OFF: 52:
Outdoor fan ON: 48:

Operation chart
Example

Indoor coil thermistor

RT12 temperature

52˚C

48˚C

Outdoor fan motor

ON

OFF

ON

OFF

Outdoor fan motor
turn OFF

Outdoor fan motor
turn ON

NOTE : During high pressure protection and for 4 min. and 15 sec. after high pressure protection, defrosting of outdoor heat

exchanger is not detected by the defrost thermistor RT61.(Refer to 9-1.2. Defrosting.)

2. Defrosting

Defrosting of outdoor heat exchanger is controlled by DEICER P.C. board, with detection by the defrost thermistor RT61.
(1) Starting conditions of defrost

When all conditions of a) ~ c) are satisfied, the defrosting operation starts.
a) The compressor cumulative operation time exceeds 40 minutes without the defrosting operation working.
b) RT61 reads - 3°C or less.
c) After releasing the high pressure protection 4 minutes and 15 seconds have elapsed.

(2) Releasing conditions of defrost

When the condition d) or e) is satisfied, the defrosting operation stops.
d) RT61 reads 10.1°C or more.
e) The defrosting time exceeds 10 minutes.

22

Operation time chart
Example

Defrost thermistor RT61

10.1: or more

-3: or less

Outdoor 52C
contactor
(Compressor)

ON
OFF

X62
(R.V. coil)

ON
OFF

30 sec.

15 sec.

30 sec.

5 sec.

SR61
Outdoor fan

Defrost
counter

Indoor fan

ON
OFF

ON
OFF

ON

Very Low

❈

Max 10 min.

NOTE

OFF

Indoor

Horizontal

Horizontal vane

Set position

NOTE ● When the indoor coil thermistor RT12 reads above 0°C, indoor fan operates at Very Low for 30 seconds.

● When the indoor coil thermistor RT12 reads 0°C or less, the indoor fan stops.

3. R.V. coil control

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

When operation starts, the 4-way valve reverses for 5 seconds right before start-up of the compressor.

Operation time chart

(COOL/DRY)

5 sec.

(HEAT)

5 sec.

Compressor

ON
OFF

ON

R.V. coil

OFF

ON

Outdoor fan

OFF

9-2. “I FEEL CONTROL” ( ) OPERATION

1. HEAT mode of “I FEEL CONTROL”

1. High pressure protection

High pressure protection is as same as HEAT OPERATION.(9-1.1.)

2. Defrosting

Defrosting is as same as HEAT OPERATION.(9-1.2.)

3. R.V. coil control

R.V. coil control is as same as HEAT OPERATION.(9-1.3.)

ON
OFF

ON
OFF

ON
OFF

23

Lead wiring

Housing point

10

Jumper wire

JRF

JRG

MODEL Change point

Defrost interval time changes from 40 minutes to 15 minutes.

Deforst start temperature changes from -3: to 0:.

MUH-A07YV ­ MUH-A09YV ­ MUH-A12YV -

E1

E1

E1

SERVICE FUNCTIONS

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

E1

E1

E1

10-1. COMPULSORY DEFROSTING MODE FOR SERVICE

By short circuit of the connector JPDS and JPSG on the outdoor deicer P.C. board, defrosting mode can be accom­plished regardless of the defrost interval restriction. (Refer to page 30.)
Defrost thermistor RT61 must read below -3°C.

10-2. CHANGE IN DEFROST SETTING

<JRF> When the JRF wire of the deicer P.C. board is cut, the defrost interval time will be changed.
<JRG> When the JRG wire of the deicer P.C. board is cut, the defrost temperature will be changed.(Refer to page 30.)

11

TROUBLESHOOTING

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

E1

E1

E1

11-1. Cautions on troubleshooting

1. Before troubleshooting, check the following:

1) Check the power supply voltage.

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

2. Take care the following during servicing.

1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the 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 25 and the check table on page 26.

24

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.
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 26.

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

MSC type

Cause:
Indoor/
Outdoor unit

• Mis-wiring

2-time flash
Cause:
Indoor unit

• Trouble of
room temp­ erature/
indoor coil
thermistor

MSC type

3-time flash
Cause:
Indoor unit

• Trouble of
indoor fan
motor

6-time flash
Cause:
Outdoor unit

• Trouble of
thermistor
in outdoor
unit

7-time flash
Cause:
Outdoor unit

• Trouble of
outdoor
control
system

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

Refer to
"Check of
indoor fan
motor".

Refer to E
"Check of
outdoor
thermistor"
on page 29.

Replace the
deicer
P.C. board.

MSC type

1-time flash
Cause:
Outdoor /
Indoor unit

• Trouble of
serial signal

Refer to D "How to check
mis-wiring and serial signal
error (When outdoor unit
doesn't work)" on page 28.
W1

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.

Unit doesn't
operate
normal
operation in
COOL or
HEAT mode.

Refer to B
"Check of
outdoor unit"
on page 27.

Refer to C
"Check of
R.V. coil"
on page 27.

W1.<The case of the trouble of the serial signal>
When the power is turned off and then turned on again, the indication shows “the trouble of mis-wiring”.

As for indoor unit
MSC type,
refer to service
manual OB329.

As for indoor unit
MCFH type,
refer to service
manual OB336.

MCFH type

4-time flash
Cause:
Indoor unit

• Trouble of
indoor
electric
P.C. board

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

Flash on and off at

0.5-second intervals

MCFH type

Cause:
Indoor/
Outdoor unit

• Mis-wiring
or trouble of
serial signal

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

E1

E1

E1

25

Yes

Compressor
doesn't operate.

Yes

Yes

Is there 230V AC between 3 on the
compressor contactor (52C) and N
on the outdoor terminal block (TB1)?

Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch.
3-minute time delay works.
Test run operation operates for 30 minutes.

Outdoor fan motor
doesn't operate.

No

Rectify the indoor and
outdoor connecting wire.

Rectify the connecting wire.

Check the compressor and compressor
capacitor, and rectify the connecting wire.

Start

Yes

Is there 230V AC between 4 on the
compressor contactor (52C) and
TAB20 on the deicer P.C. board?

Is there 230V AC between L–N
on the outdoor terminal block (TB1)?

Replace the
deicer P.C. board.

Replace the
deicer P.C.
board.

No

No

Yes

Yes

No

Check the outdoor fan motor
and rectify the connecting
wire.

Is there 230V AC between 4 on the
compressor contactor (52C) and
TAB 20 on the deicer P.C. board?

Replace the
deicer P.C. board.

No

Yes

Rectify the indoor and
outdoor connecting wire.

Rectify the connecting wire.

Is there 230V AC between L–N on
the outdoor terminal block (TB1)?

No

No

Is the switch SW2-2 on the
indoor electronic control
P.C. board set to MUH type?

No

Change the switch SW-2-2
on the indoor electronic control
P.C. board to MUH type.

Yes

+

–

Is there 5V DC between J205 –J101 on
the deicer P.C. board?

+

–

Is there 5V DC between J205 –J101 on
the deicer P.C. board?

Indoor unit
MSC type

Indoor unit
MCFH type

P

R

C

S

RED

BLK

WHT

MAINAUX.

WHTRED

BLK

MAIN

AUX.

FUSE

11-3. Trouble criterion of main parts

WHTRED

BLK

MAIN

AUX.

P

MUH-A07YV - MUH-A09YV - MUH-A12YV -

Part name

Defrost
thermistor
(RT63)

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

Normal

5kΩ ~ 60kΩ

Check method and criterion

Abnormal

Open or short-circuit

E1E1E1

Figure

Compressor
(MC)
INNER
PROTECTOR

MUH-A07/A09YV

150i 5°C OPEN

90i10°C CLOSE

MUH-A12YV

155i 5°C OPEN

90i10°C CLOSE

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

Normal

MUH-A12YV

2.46~3.01Ω

2.96~3.63Ω

C-R

C-S

MUH-A07YV

3.41~4.18Ω

5.41~6.63Ω

MUH-A09YV

2.99~3.67Ω

4.02~4.92Ω

Outdoor fan
motor
(MF)
INNER
PROTECTOR

MUH-A07YV

130i 5°C OPEN

83i15°C CLOSE

INNER FUSE

MUH-A09/A12YV

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

Color of

lead wire

WHT-BLK
BLK-RED

MUH-A07YV

361 ~ 443
381 ~ 468

Normal

MUH-A09/A12YV

Ω
Ω

145i 2°C
CUT OFF

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

196 ~ 241
201 ~ 246

Abnormal

Open or short-circuit

Abnormal

Ω

Ω

Open or short-circuit

MUH-A07YV

MUH-A09/A12YV

P INNER PROTECTOR

AA

Check of outdoor unit

26

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

After 3 minutes, does the unit
operate in HEAT mode?

Ok

No

Is there 230V AC between
CN7211 – 2 on the deicer
P.C. board?

Replace the
deicer P.C. board.

Yes

Yes

Yes

No

Replace the R.V. coil.

Turn ON the power supply and operate
the indoor unit in COOL mode by pressing
the EMERGENCY OPERATION switch.

BB

Check of outdoor unit

Start

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

Is there 230V AC between 3 on the

Does compressor stop?

Yes

OK

No

compressor contactor (52C) and N on the
outdoor terminal block (TB1)?

Yes

Replace the
deicer P.C. board.

No

Rectify the connecting wire.

Does outdoor fan motor stop?

Yes

OK

No

Replace the
deicer P.C. board.

Unit operates COOL mode even if it is set to HEAT mode.

w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit.

CC

Check of R.V. coil

Turn ON the power supply and operate
the indoor unit in HEAT mode by pressing
the EMERGENCY OPERATION switch.

After 3 minutes, does the unit
operate in COOL mode?

Yes

Is there 230V AC between
CN7211 – 2 on the deicer P.C.
board?

Yes

Replace the R.V. coil.

No

OK

No

Replace the
deicer P.C. board

Unit operates HEAT mode even if it is set to COOL mode.

w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit.

CC

Check of R.V. coil

27

When OPERATION INDICATOR lamp flashes 0.5-second intervals or 1-time.
Outdoor unit does not operate.

DD

How to check mis-wiring and serial signal error

Example
Indoor unit MSC type

Start

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

Is the outdoor unit "MUH" type?

Yes

•Turn ON the power supply(indoor/outdoor unit).

•Press once EMERGENCY OPERATION switch.

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

w 2

Mis-wiring is indicated.

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

MU or MUX type, when the outdoor unit is MU or MUX type.
If the setting is MUH or MXZ type, the unit does not work.

w 2 Short circuit of JPG and JPS on the indoor electronic control
P.C. board enables self-check to be displayed in 3 seconds.

No

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

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

Does the unit operate?

Refer to the
"Instruction of
troubleshooting."

(0.5-sec. ON, 0.5-sec. OFF)

Make them sure.

Yes

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

No

1. Turn OFF the power supply(indoor/outdoor unit) and disconnect indoor and outdoor connecting wire on indoor side.

2. Short-circuit between indoor terminal block N and 3.

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

Is there 20V DC between both ends of
R132 on indoor electronic control P.C.
board ?
( By tester, the stylus is between 0 ~ 20V. )

Yes

•Turn OFF the power supply(indoor unit).

•Connect ON indoor and outdoor connecting wire.

No

Replace the indoor electronic
control P.C. board.

No

Yes

w1

OK

Turn ON the power supply(outdoor unit).

Is there 230V AC between outdoor terminal
block L-N (TB1)?

Yes

Is there 5V DC between J205 + –J101 - on the deicer P.C. board?

Yes

Turn ON the power supply(indoor unit).

During EMERGENCY OPERATION,
is there 10V DC between both ends
of R601?
(By tester, the stylus is between 5 ~10V)

Yes

Replace the deicer P.C. board.

As for indoor unit MSC type, refer to service manual OB329.
As for indoor unit MCFH type, refer to service manual OB336.

28

Check the outdoor power supply,

No

power supply cord and
connection.

No

Replace the deicer P.C. board.

Make the wiring between CN730

No

on the deicer P.C. board and
outdoor terminal block correct.

When OPERATION INDICATOR lamp flashes 6-time.
Thermistors in the outdoor unit are abnormal.

EE

Check of outdoor thermistor

Start

Turn OFF the
power supply.

Defrost thermistor (RT61)

Measure
resistance
between CN 661
1 and 2.

Is the resistance of
thermistor normal?

No

Replace the
thermistor.

Reconnect CN661.
Turn ON the power

Yes

supply and press
the EMERGENCY
OPERATION
switch.

Replace the deicer P.C.

board.

No

Does the unit operate
10 minutes or more?

Yes

OK ❈

❈ Defective contact of the connector is considered.

29

MUH-A07YV ­MUH-A09YV ­MUH-A12YV -

E1
E1
E1

Outdoor deicer P.C. board

CN711
Outdoor fan motor

230V AC

}

CN721
R.V. coil

230V AC

}

5V DC
J205
J101

Power supply input

230V AC

}

NR61
Varistor

F61
Fuse

2A/250V

R601

+

5~10VDC

}

--

Defrost interval time
short pin
(JPDS, JPSG)
(Refer to page 24.)

Jumper wire for
change in

}

}

CN661 1-2
Defrost thermistor RT61

+

--

defrost setting
(JRF,JRG)
(Refer to page

24.)

12V DC
J204

+

J101

--

30

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

MUH-A07YV - MUH-A09YV - MUH-A12YV -

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

1. Removing the cabinet

(1) Remove the screws of the top panel.
(2) Remove the screw of the service panel.
(3) Remove the screws of the cabinet.
(4) Remove the screws of the front panel and motor support.
(5) Remove the service panel, and remove the screw from

the insides.
(6) Remove the top panel.
(7) Remove the cabinet.

Photo 3

Screws of the
service panel

Screws of
the top panel

E1E1E1

Photo 1

Screws of the front panel and motor support

Screws
of the
cabinet

Screws of the cabinet

Photo 2

Service
panel

31

Screw of the
top panel

Screws of the
cabinet

OPERATING PROCEDURE PHOTOS

2. Removing the deicer P.C. board

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

deicer P.C. board.

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

3. Removing the propeller and the outdoor fan motor

(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) Remove lead clamps and disconnect the outdoor fan motor

connector.
(5) Remove screws fixing the fan motor.
(6) Remove the outdoor fan motor.

Photo 4

Screw

Photo 5

Propeller

nut

Deicer
P.C. board

Screws of the
outdoor fan motor

Propeller

Screws

Relay panel

Hook

Terminal
block

Lead clamps

Outdoor
fan motor
connector

32

Screws of the
outdoor fan motor

OPERATING PROCEDURE PHOTOS

4. Removing the compressor

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the relay panel.
(3) Remove the soundproof felt.
(4) Remove the terminal cover on the compressor.
(5) Disconnect lead wires from the glass terminal of the com-

pressor.
(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

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).

Photo 6

Glass
terminal

Compressor

Discharge pipe

Suction pipe

Compressor
set nuts

Terminal cover

33

13

No.

Part No.

Remarks

1

2
3

4

5
6

7
8

9
10
11

12
13

14

15

E02 835 630
E02 836 630
E02 837 630
E02 815 232
E02 815 521
E02 742 900
E02 753 900
E02 754 900
E02 075 506
E02 832 290
E02 742 661
E02 747 661
E02 745 662
E02 745 961
E02 815 245
E02 836 233
E02 336 515
E02 442 515
E02 815 297
E02 159 936
E02 156 936
E02 339 936
E02 024 936
E02 726 936
E02 837 936
E02 154 642

OUTDOOR HEAT EXCHANGER
OUTDOOR HEAT EXCHANGER
OUTDOOR HEAT EXCHANGER
CABINET
GRILLE(OUT)
COMPRESSOR
COMPRESSOR
COMPRESSOR
COMPRESSOR RUBBER SET
BASE
STOP VALVE(GAS)
STOP VALVE(GAS)
STOP VALVE(LIQUID)
4-WAY VALVE
SERVICE PANEL
BACK PANEL
MOTOR SUPPORT
MOTOR SUPPORT
TOP PANEL
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CHECK VALVE

RN092VHSHT
RN104VHSHT
RN135VHSHT
3RUBBERS/SET

{9.52
{12.7
{6.35

{3.0x{1.4x800
{3.0x{1.4x500
{3.0x{1.4x600
{3.0x{1.4x1000
{3.0x{1.6x600
{3.0x{1.6x1050

MC
MC
MC

1

1
1

1

3
1
1

1
1
1
1

1
1

2
1
1

1

1

1
1
1

3
1
1

1
1
1
1
1

1
2
1
1

1

1
1
1

1
3
1

1
1
1
1
1

1
1

2

1
1
1

Symbol
in Wiring
Diagram

Part name

Q'ty/unit

MUH-A07YV-

E1

MUH-A09YV-

E1

MUH-A12YV-

E1

PARTS LIST

MUH-A07YV - MUH-A09YV - MUH-A12YV -

13-1. OUTDOOR UNIT STRUCTURAL PARTS

1

2

3

13

E1E1E1

12

11

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

34

46

5

7

10

8

9

MUH-A07YV - MUH-A09YV - MUH-A12YV -

E1E1E1

13-2. OUTDOOR UNIT

13-3. ACCESSORY
ELECTRICAL PARTS AND
FUNCTIONAL PARTS

8

1

2

3

7

4

6

5

12

13-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

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

Q'ty/unit

MUH-A09YV-

1

1

1

1
1
1
1
1
1
1
1

E1

MUH-A12YV-

No.

1

E02 665 501
E02 835 301

2

E02 672 301
E02 752 353

3

E02 694 353
E02 696 353
E02 835 451

4

E02 836 451

5

E02 128 383

6

E02 817 374

7

E02 836 374

8

E02 699 310

9

E02 440 490

10

E02 095 382

11

E02 820 385

Part No.

Part name

PROPELLER
OUTDOOR FAN MOTOR
OUTDOOR FAN MOTOR
COMPRESSOR CAPACITOR
COMPRESSOR CAPACITOR
COMPRESSOR CAPACITOR
DEICER P.C. BOARD
DEICER P.C. BOARD
SURGE ABSORBER
TERMINAL BLOCK
TERMINAL BLOCK
DEFROST THERMISTOR
R. V. COIL
FUSE
VARISTOR

in Wiring

Symbol

Diagram

MF
MF
C1
C1
C1

DSAR

TB1

TB2
RT61
21S4

F61

NR61

MUH-A07YV-

1
1

1

1

1
1
1
1
1
1
1

E1

13

1

1

1

1
1
1
1
1
1
1
1

Remarks

E1

RC6V20­RA6V33­20+ /440V AC
25+ /440V AC
30+ /440V AC

3P
2P

250V 2A

13-3. ACCESSORY

12

E02 817 704

13

E02 440 705

DRAIN SOCKET
DRAIN CAP

35

1
2

1
2

1
2

2PCS/SET

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

CC

Copyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in Feb. 2004. No.OB331 REVISED EDITION-A 6
Distributed in Dec. 2003. No.OB331 6
Made in Japan

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