Mitsubishi Electric MSC-A07WV Bedienungsanleitung

SERVICE MANUAL

CONTENTS

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

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

3. INDOOR/OUTDOOR

CORRESPONDENCE TABLE ···························8

4. INDOOR UNITS COMBINATION·······················9

5. SPECIFICATION···············································10

6. NOISE CRITERIA CURVES···························· 17

7. OUTLINES AND DIMENSIONS ······················ 20

8. WIRING DIAGRAM ··········································25

9. REFRIGERANT SYSTEM DIAGRAM··············32

10. PERFORMANCE CURVES······························45

11. MICROPROCESSOR CONTROL·····················84

12. SERVICE FUNCTIONS···································102

13. TROUBLESHOOTING····································104

14. DISASSEMBLY INSTRUCTIONS···················129

15. PARTS LIST····················································144

16. OPTIONAL PARTS·········································157

Wireless type

Models

MSC-A07WV - (WH) · MU-A07WV -

MSC-A09WV - (WH) · MU-A09WV -

MSC-A12WV - (WH) · MU-A12WV -

MSC-A07WV - (WH) · MUH-A07WV -

MSC-A09WV - (WH) · MUH-A09WV -

MSC-A12WV - (WH) · MUH-A12WV -

Multi system type

Models

MSC-A07WV - (WH) · MUX-A10WV -

MSC-A09WV - (WH) · MUX-A19WV -

MSC-A12WV - (WH) · MUX-A20WV -

· MUX-A25WV -

· MUX-A26WV -

Inverter-controlled multi system Model

· MXZ-A18WV -

E1E1

MSC-A07WV -

MSC-A09WV -

MSC-A12WV - E1

No. OB307

REVISED EDITION-A

HFC

utilized

R410A

SPLIT-TYPE, AIR CONDITIONERS

SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS

Revision:

●MXZ-A18WV - have been added.

●MSC-A07/09/12WV - Part No..have changed.

VARISTOR (NR11& NR12)

E02 336 385 ➔E02 749 385

●Please void OB307.

Indication of

model name

Remote

controller

OB307A1.qxp 03.2.19 3:56 PM Page 1

TECHNICAL CHANGES

MSC-07RV- ➔MSC-A07WV-

MSC-09RV- ➔MSC-A09WV-

MSC-12RV- ➔MSC-A12WV-

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

2. Indoor model has changed.

MU-07RV- ➔MU-A07WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH130VGCT➔RN092VHSHT)

MU-09RV- ➔MU-A09WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH140VGCT➔RN099VHSHT)

MU-12RV- ➔MU-A12WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH220VHAT➔RN135VHSHT)

MUH-07RV- ➔MUH-A07WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH130VGCT➔RN092VHSHT)

MUH-09RV- ➔MUH-A09WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH165VGCT➔RN104VHSHT)

MUH-12RV- ➔MUH-A12WV-

1. Refrigerant has changed. (R22➔R410A)

2. Compressor has changed. (RH220VHAT➔RN135VHSHT)

MUX-10RV- ➔MUX-A10WV-

1. Outdoor model has changed.

2. Refrigerant has changed. (R22➔R410A)

MUX-19TV- ➔MUX-A19WV-

MUX-20TV- ➔MUX-A20WV-

MUX-25TV- ➔MUX-A25WV-

1. Refrigerant has changed. (R22➔R410A)

MUX-24RV- ➔MUX-A26WV-

1. Outdoor model has changed.

2. Refrigerant has changed. (R22➔R410A)

MXZ-18TV - ➔MXZ-A18WV -

• Outdoor model has changed.

• Refrigerant has changed.

E1E2

E1E1

E1E2

E1E4

OB307A1.qxp 03.2.19 3:56 PM Page 2

Refrigerating

oil

Refrigerant

New refrigerant

R410A

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

Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-51.4

1.557

Non combustible

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

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 CO2

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.

1As 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.

2Take 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.

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

piping.)

4Composition 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])

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

OB307A1.qxp 03.2.19 3:56 PM Page 3

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

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

(MPa [Gauge])

R410A

R22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(:)

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

international system of units(SI unit system).

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

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 R410Awith a charging cylinder because the

refrigerant bubbles due to high pressure and high-speed vaporization

Yes

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

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

1Specifications

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.

Wall

thickness

Outside diameter

Pipe mm

For liquid

For gas

6.35

9.52

12.7

0.8 mm

Heat resisting foam plastic

Specific gravity 0.045 Thickness 8 mm

Insulation material

OB307A1.qxp 03.2.19 3:57 PM Page 4

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)

R410A

Pipe diameter

6.35

9.52

12.7

Dimension of flare nut

R22

2Flaring 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.

OB307A1.qxp 03.2.19 3:57 PM Page 5

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSC-A07WV -

MSC-A09WV -

MSC-A12WV - E1

Emergency operation switch

Operation section

Horizontal vane

Air filter

Air outlet

Deodorizing filter

(Gray sponge type)

Vertical vane

Air inlet

to Breaker

Remote control

receiving section

Remote controller

Display section

(When the front panel is opened)

Operation indicator lamp

Receiving section

Air cleaning filter

(White bellows type)

Power supply cord

Panel

Front panel

Air inlet

Piping

Drain hose

Air outlet

Drain outlet

(back and side) Air inlet

Piping

Drain hose

Air outlet

Drain outlet

(back and side)

OUTDOOR UNIT

MU-A07WV - MUH-A07WV -

MU-A09WV - MUH-A09WV -

MU-A12WV - MUH-A12WV - E1E1

E1E1

E1E1 MUX-A10WV- E1

OB307A1.qxp 03.2.19 3:57 PM Page 6

OUTDOOR UNIT

Air inlet

Piping

Drainage hose

(Back and side)

Air outlet

Drain outlet

MUX-A26WV- E1

Air outlet

Drain outlet

Air inlet

Piping

Drainage hose

(Back and side)

MUX-A19WV- MUX-A25WV-

MUX-A20WV- E1

E1E1

ACCESSORIES

MSC-A07WV-

MSC-A09WV-

MSC-A12WV- E1

E1 MUH-A07WV-

MUH-A09WV-

MUH-A12WV- E1

Installation plate

Installation plate fixing screw 4 o25 mm

Remote controller holder

Fixing screw for 33.5 o16 mm

Battery (AAA) for remote controller

Wireless remote controller

Felt tape (Used for left or left-rear piping)

Deodorizing filter

Air cleaning filter

Refrigerant oil

Drain socket

Drain cap 1

Air outlet

Drain outlet

Air inlet

(Back and side)

MXZ-A18WV- E1

Drain socket

Drain cap 1

1

OB307A1.qxp 03.2.19 3:57 PM Page 7

MUX-A19WV-

MUX-A25WV-

MUX-A20WV-

MUX-A10WV-

MUX-A26WV-

Combination of

the connectable

indoor units

OUTDOOR UNIT

A: MSC-A12WV- E1

B: MSC-A07WV- E1

MSC-A09WV- E1

MSC-A07WV- E1

MSC-A12WV- E1

MSC-A09WV- E1

MSC-A12WV- E1

MSC-A07WV - MSC-A09WV - MSC-A12WV - E1E1E1

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

I FEEL

COOL

DRY

CLOCK

RESET CLOCK

HEAT

/FAN

Open the front lid.

ON/OFF

TOO

COOL

TOO

WARM

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

TEMPERATURE buttons

OPERATION SELECT button

FAN SPEED CONTROL button OFF-TIMER button

HR. button

MIN. button

(TIME SET button)

ON-TIMER button

RESET button

ECONO COOL button

VANE CONTROL button

CLOCK SET button

REMOTE CONTROLLER

INDOOR/ OUTDOOR CORRESPONDENCE TABLE3

OB307A1.qxp 03.2.19 3:57 PM Page 8

❈There is no combination other than this table.

MXZ-A18WV-

OUTDOOR UNIT

Combination of the

connectable indoor units

07+07

07+09

07+12

09+09

09+12

12+12

INDOOR UNITS COMBINATION

07+07

07+09

07+12

09+09

09+12

12+12

3.62

3.91

5.70

7.15

7.73

7.78

8.60

8.84

8.99

2.3

(0.9-2.95)

2.5

(0.9-3.30)

3.4

(0.9-4.00)

4.6

(1.49-5.30)

4.8

(1.49-5.40)

5.0

(1.51-5.60)

5.0

(1.51-5.55)

5.3

(1.53-5.80)

5.4

(1.55-6.00)

0.750

(0.225-1.000)

0.810

(0.225-1.070)

1.180

(0.220-1.450)

1.480

(0.370-2.060)

1.600

(0.370-2.070)

1.610

(0.365-2.100)

1.780

(0.370-2.105)

1.830

(0.365-2.110)

1.860

(0.370-2.130)

–

2.3

2.5

2.98

2.5

3.1

2.65

2.3

2.5

3.4

2.3

2.02

2.5

2.2

2.65

Indoor units

combination Unit A Unit B

Cooling capacity (kW)

Total Outdoor unit

power consumption

(kW)

Current

(A) Power

factor

(%)

230V

NOTE: Electrical data is for outdoor unit only.

MXZ-A18WV - E1

NOTE: Electrical data is for outdoor unit only.

07+07

07+09

07+12

09+09

09+12

12+12

4.73

5.14

6.76

9.32

9.37

9.03

9.28

8.91

8.55

3.3

(0.9-4.0)

3.6

(0.9-4.5)

4.0

(0.9-4.8)

6.1

(1.53-6.70)

6.2

(1.53-6.80)

6.5

(1.55-7.00)

6.5

(1.55-7.0)

6.55

(1.56-7.1)

6.6

(1.58-7.2)

0.980

(0.225-1.115)

1.065

(0.225-1.195)

1.400

(0.220-1.680)

1.930

(0.300-2.070)

1.940

(0.300-2.040)

1.870

(0.295-1.980)

1.920

(0.295-2.010)

1.845

(0.295-1.950)

1.770

(0.290-1.850)

–

3.05

3.23

3.88

3.25

3.77

3.30

3.3

3.6

4.0

3.05

2.97

2.62

3.25

2.78

3.30

Indoor units

combination Unit A Unit B

Heating capacity (kW)

Total Outdoor unit

power consumption

(kW)

Current

(A) Power

factor

(%)

230V

MXZ-A18WV - E1

OB307A1.qxp 03.2.19 3:57 PM Page 9

SPECIFICATION

Indoor model

Function

Indoor unit power supply

Air flow(High/Med. /Low )

Power outlet

Running current

Power input

Power factor

Starting current

Fan motor current

Model

Winding

resistance(at 20:)

Dimensions WOHOD

Weight

Air direction

Sound level(High/Med. /Low )

Fan speed (High/Med. /Low )

Fan speed regulator

Thermistor RT11(at 25:)

Thermistor RT12(at 25:)

Outdoor model

Capacity

Dehumidification

Outdoor air flow

Power outlet

Running current

Power input

Auxiliary heater

Power factor

Starting current

Compressor motor current

Fan motor current

Model

Output

Winding

resistance(at 20:)

Model

Winding

resistance(at 20:)

Dimensions WOHOD

Weight

Sound level

Fan speed

Fan speed regulator

Refrigerant filling

capacity (R410A)

Refrigerating oil (Model)



K/h

"

rpm

k"

R/h

K/h

A(kW)

"



"

rpm

MSC-A07WV - E1

Single phase

230V,50Hz

0.17

—

0.17

WHT-BLK 413

BLK-RED 334

815O278O217

MU-A07WV - E1

Single phase

230V,50Hz

—

2.76

0.22

RN092VHSHT

600

C-R 3.87

C-S 6.14

RA6V23-FC

WHT-BLK 353

BLK-RED 321

780o540o255

735

0.75

350 (NEO22 )

Cooling

474/372 /276

RC4V19-LA

36/31 /25

900/750 /600

2.3

0.9

1,686

2.98

675

3.24

MSC-A09WV - E1

Single phase

230V,50Hz

0.17

RC4V19-LA

WHT-BLK 413

BLK-RED 334

815O278O217

MU-A09WV - E1

Single phase

230V,50Hz

—

RN099VHSHT

700

C-R 3.40

C-S 4.56

RA6V23-FC

WHT-BLK 353

BLK-RED 321

780o540o255

735

0.80

350 (NEO22 )

Cooling

474/384 /306

—

0.17

36/31 /25

900/770 /650

2.55

1.1

1,686

3.26

745

3.04

0.22

3.27

MSC-A12WV - E1

Single phase

230V,50Hz

582/444 /324

0.19

RC4V19-KA

WHT-BLK 316

BLK-RED 299

815O278O217

MU-A12WV - E1

Single phase

230V,50Hz

1.6

1,914

4.91

—

RN135VHSHT

900

C-R 2.79

C-S 3.36

RA6V33-DC

WHT-BLK 301

BLK-RED 332

780o540o255

825

0.83

620 (NEO22)

Cooling

—

0.19

40/33 /26

930/760 /600

3.45

1,100

4.60

0.31

3.03

Electrical

data

Fan

motor

Special

remarks

Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity

Coefficient of performance(C.O.P)

Outdoor unit power supply

Capacity

wwwwww

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB24°C

Indoor-Outdoor piping length 5m

wReference value

OB307A1.qxp 03.2.19 3:57 PM Page 10

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