Mitsubishi MUZ-A09YV-E1, MUZ-A12YV-E1, MUZ-A09YVH-E1, MUZ-A12YVH-E1 Service Manual

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

HFC

utilized

R410A

Wireless type Models

Revision A:

● MUZ-A12YV- and MUZ-A12YVH- can be connected to MCFZ-A12WV- .

● Some mistakes were corrected.

Please void OB328.

No. OB328

REVISED EDITION-A

E1E1

E1

MUZ-A09YV MUZ-A12YV -

E1

MUZ-A09YVH MUZ-A12YVH -

Indication of model name

MUZ-A09YV MUZ-A12YV MUZ-A09YVH MUZ-A12YVH -

E1

CONTENTS

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

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

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

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

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

E1

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

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

8. PERFORMANCE CURVES······························12

9. ACTUA TOR CONTROL····································21

10. SERVICE FUNCTIONS·····································22

11. TROUBLESHOOTING ······································22

12. DISASSEMBLY INSTRUCTIONS·····················34

13. PARTS LIST······················································38

NOTE:

This service manual describes technical data of the outdoor units.

•As for indoor units MSZ-A09YV- and MSZ-A12YV- , refer to the service manual OB327.

•As for indoor unit MCFZ-A12WV- , refer to the service manual OB344.

E1

E1E1

Refrigerating

oil

Refrigerant

New refrigerant

R410A

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

Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-51.4

1.557 64

Non combustible

0

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

A1

86.5

-40.8

0.94

44.4

Non combustible

0.055 1700

Gas phase

Possible

Compatible oil

Light yellow

Non

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

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

2

New Specification Current Specification

The incompatible refrigerating oil easily separates from refrigerant and is in the upper layer inside the suction muffler. Raising position of the oil back hole enables to back the refrigerating oil of the upper layer to flow back to the compressor.

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

Compressor

Suction muffler

Oil back hole

Refrigerating oil

Refrigerant

Compressor

Suction muffler

Oil back hole

Refrigerating oil /Refrigerant

Compressor

Revision A:

•MUZ-A12YV- and MUZ-A12YVH- can be connected to MCFZ-A12WV- .

•Some mistakes were corrected.

E1E1E1

1

TECHNICAL CHANGES

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

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

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

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

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

2

Conversion chart of refrigerant temperature and pressure

R410A tools Can R22 tools be used?

Gas leak detector

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

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

Dedicated for HFC refrigerant.

6.35 mm and 9.52 mm

Description

Clamp bar hole has been enlarged to reinforce the spring strength in the tool. Provided for flaring work (to be used with R22 flare tool).

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

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

No

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

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

(MPa [Gauge])

4.0

3.5

3.0

2.5

2.0

1.5

R410A R22

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

international system of units(SI unit system).

1.0

0.5

Saturated liquid pressure

0.0

-0.5

-30 -20 -10 0 10 20

30

40 50 60

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

(:)

1.Tools dedicated for the air conditioner with R410A refrigerant

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

2.Refrigerant piping

1 Specifications

Use the refrigerant pipes that meet the following specifications.

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

3

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

mm

6.35

9.52

12.7

17 22 26

Dimension of flare nut

R22

17 22 24

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

PART NAMES AND FUNCTIONS

MUZ-A09YV - MUZ-A12YV MUZ-A09YVH - MUZ-A12YVH -

OUTDOOR UNIT

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

3

Capacity

Electrical

Coefficient of performance(C.O.P)

Compressor

Fan

Special

NOTE : Test conditions are based on ISO 5151

SPECIFICATION

MUZ-A09YV -

Outdoor model

Function

Power supply

Capacity Rated frequency(Min.~Max.) Dehumidification Air flow Starting current ✽1 Compressor motor current ✽1 Fan motor current

data

kW

r/h

K /h

A A A

✽1 Model Output Winding resistance(at 20:)

W

"

Model Winding

motor

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

"

mm

kg

dB(A)

rpm Fan speed regulator Refrigerant filling capacity(R410A) Refrigerating oil (Model)

remarks

Thermistor RT61

(at 0:) Thermistor RT62(at 100:) Thermistor RT64(at 50:) Thermistor RT65(at 25:)

kg

cc k" k" k" k"

Cooling : Indoor DB 27: WB 19:

Outdoor DB 35: WB(24:)

Heating : Indoor DB 20: WB 15:

Outdoor DB 7: WB 6:

Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency

MUZ-A09YVH -

MSZ-A09YV -

Cooling

2.5 (0.9-3.2)

2.89

3.73

U-V 1.53 U-W 1.53

E1E1

Indoor model

Heating

Single phase

230V,50Hz

3.2 (0.9-5.0)

1.4 1900

3.90

0.24

KNB073FBVH

550

V-W 1.53

RA6V21-AA WHT-BLK 347 BLK-RED 281

800o550o285

33 46

825

1

0.80

320 (NEO22)

32.6

13.4 17 10

ACCESSORIES

OUTDOOR UNIT

Drain socket

1

E1

—

3.49

3.81

E1

MUZ-A12YV MUZ-A12YVH -

MSZ-A12YV -

Cooling

Single phase

230V,50Hz

3.5 (1.0-4.1)

2.0

3.21 KNB092FAAH

U-V 0.49 U-W 0.49

RA6V21-AA WHT-BLK 347 BLK-RED 281

800o550o285

47

320 (NEO22)

Indoor model

Heating

4.0 (0.9-6.0)

1900

5.00

4.57

0.24

3.70

650

V-W 0.49

34

48

825

1

0.90

32.6

13.4 17 10

—

MUZ-A09YV MUZ-A12YV -

E1 E1

1

E1

MUZ-A12YV MUZ-A12YVH -

E1

Indoor model

E1

MCFZ-A12WV -

Cooling

E1

Heating

Single phase

230V,50Hz

3.5 (1.0-4.1)

2.0

3.9 (0.9-5.9) —

1900

5.00

4.46

0.24

3.21

3.61

KNB092FAAH

650

U-V 0.49 U-W 0.49

V-W 0.49

RA6V21-AA WHT-BLK 347 BLK-RED 281

800o550o285

34

47

48

825

1

0.90

320 (NEO22)

32.6

13.4 17 10

5

OUTDOOR UNIT

Model

Item

Current transformer Current transformer Smoothing capacitor Outdoor fan capacitor Diode module Fuse Fuse Defrost heater Power transistor module Expansion valve coil Reactor Current-detecting resistor Current-detecting resistor Current-limiting resistor Solid state relay Terminal block Relay Relay Relay R.V. coil Heater protector Outdoor fan motor thermal fuse

MUZ-A09YV -

E1

(CT)

(CT761, CT781)

(

C62A, C62B, C61B

)

(C65)

(DB61, DB65)

(F61)

(F71, F801)

(H) (IPM) (LEV)

(L61)

(R61)

(R831)

(

R64A, R64B

)

(SR61)

(TB) (X63) (X64) (X66)

(21S4)

(26H)

MUZ-A09YVH -

E1

MUZ-A12YV -

E1

MUZ-A12YVH -

E1

ETQ19Z53AY ETQ19Z71AY

680+ 420V

1.8+ 440V D25XB60

250V 20A

250V 3.15A

PS21244A

CAD-MD12ME 12VDC

10A 23.0mH

25m" 5W

5.1" 10W G3MB

3P

G5N-1a/G5NB-1a

G4A-1A-PS

LD30013

Open 152:

—

230V 130W

G5N-1a/G5NB-1a

Open 45:

—

230V 130W

G5N-1a/G5NB-1a

Open 45:

45m" 5W 50m" 5W (2 elements)

Specifications and rating conditions of main electric parts

6

4

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

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 : Dry-bulb temperature 35: Wet-bulb temperature (24:)

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A)) LINE

High

SPEED

HEATING

46 46

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

NOISE CRITERIA CURVES

MUZ-A09YV MUZ-A09YVH -

E1

MUZ-A12YV MUZ-A12YVH -

Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

10

63 125 250 500 1000 2000 4000 8000

E1

FAN SPEED

High

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING HEATING

SPL(dB(A))

LINE

47

48

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

OUTDOORUNIT

1m

MICROPHONE

7

5

10

69

800

302.5 500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

23

Service panel

Service port

285

344.5

44

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

40

Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35

Gas refrigerant pipe joint Refrigerant pipe (flared) [9.52

43-

35-

2 holes 10o21

Drain hole [33 (MUZ-A09/A12YVH)

Drain hole [42 (MUZ-A09/A12YV)

REQUIRED SPACE

Basically open 100mm or more without any obstruction in front and on both sides of the unit.

350mm or more

200mm or more

100mm or more

Open two sides of left, right, or rear side.

OUTLINES AND DIMENSIONS

MUZ-A09YV - MUZ-A12YV MUZ-A09YVH - MUZ-A12YVH -

OUTDOOR UNIT

E1E1

Unit: mm

8

6

WIRING DIAGRAM

MUZ-A09YV MUZ-A12YV -

OUTDOOR UNIT

E1

MODELS WIRING DIAGRAM

RED

2

RED

V

F801

MC

3

N

C61B

C62B

C62A

CN61

LD-W

W

R61

V

WHT

C

CT781

IPM

T801

6

N

LEV

724

IC801

CN642

INVERTER P.C. BOARD

TR821

R831

CN641

CN643

BLK

U

1

BLK

LD-U

U

P

W

WHT

LD-V

CT761

+++

421 3

2 112

the indoor unit electric wiring diagram for

servicing.

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

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

RT64

RT61RT62

NAME

RT65

BLK

L61

BLK

DB61

TAB63

R64B R64A

L63

L62

TAB61

WHT

F61

WHT

TB

2

230V~

BLU

N

LD70

X64

TAB62

BLU

RED

3

12V

LD69

BLK

BLU

4

X63

3

F71

CT

DSA

NR61

GRN

GRN/YLW

21S4

2

1

LDE

DB65

123

1

CN721

C65

SR61

CN800

MF

3

2

213

CN601

725

C

N

7

726

C

N

CN771

POWER P.C. BOARD

AMBIENT TEMPERA TURE THERMIST OR

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

SYMBOL

RT65

R61,R831

R64A,R64B

NAME

EXPANSION VALVE COIL

REACTOR

CMC COIL

SYMBOL

LEV

L61

L62,L63MCMF

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

OUTDOOR FAN CAPACITOR

SOLID STATE RELAY

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

SR61TBTR821

COMPRESSOR

DIODE MODULE

T801

X63,X64

OUTDOOR FAN MOTOR (INNER FUSE)

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

NR61

RT61

RT62

SURGE ABSORBER

FUSE (20A)

FUSE (3.15A)

INTELLIGENT POWER DEVICE

R.V. COIL

21S4

FIN TEMPERATURE THERMIST OR

RT64

POWER TRANSISTOR MODULE

TO

INDOOR

UNIT

CONNEC-

TING

SYMBOL

CT,CT761,CT781

C62A,C62B,C61B

C65

DB61,DB65

DSA

F61

F71,F801

IC801

IPM

9

MUZ-A09YVH MUZ-A12YVH -

E1

MODELS WIRING DIAGRAM

E1

U

V

OUTDOOR UNIT

BLK

L61

BLK

LD-U

U

P

DB61

TAB63

R64B R64A

W

RED

2

1

WHT

LD-V

CT761

V

F801

+++

MC

3

RED

N

C61B

C62B

C62A

LD70

X64

CN61

LD-W

W

R61

BLU

4

WHT

C

CT781

IPM

T801

LD69

BLK

BLU

3

6

N

X63

LEV

724

IC801

1

TR821

123

21S4

2

CN721

21

CN642

4 3

INVERTER P.C. BOARD

CN641

12

2

DB65

1

R831

CN800

MF

2

3

C

CN643

21 3

CN601

725

N

7

726

C

N

1

RT65 RT61RT62 RT64

CN771

C65

the indoor unit electric wiring diagram for

servicing.

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

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

NAME

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

SOLID STATE RELAY

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

HEATER PROTECTOR

SYMBOL

R61,R831

R64A,R64B

SR61TBTR821

T801

X63,X64,X66

21S4

26H

NAME

L63

L62

TAB61

WHT

F61

WHT

TB

2

230V~

TO

TAB62

BLU

RED

N

3

12V

INDOOR

UNIT

CT

DSA

GRN/YLW

CONNEC-

TING

F71

NR61

GRN

BLU

LDE

SR61

X66

RED

1

BLKBLK

BLK BLK

2

321

YLW

26H

POWER P.C. BOARD

CN722

BLK

2

1

BLK

H

10

EXPANSION VALVE COIL

REACTOR

CMC COIL

SYMBOL

LEV

L61

L62,L63MCMF

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

OUTDOOR FAN CAPACITOR

SYMBOL

CT,CT761,CT781

C62A,C62B,C61B

C65

OUTDOOR FAN MOTOR (INNER FUSE)

VARISTOR

DEFROST THERMISTOR

COMPRESSOR

DIODE MODULE

SURGE ABSORBER

DB61,DB65

DSA

DISCHARGE TEMPERATURE THERMIST OR

NR61

RT61

RT62

FUSE (20A)

FUSE (3.15A)

DEFROST HEATER

F61

F71,F801HIC801

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

RT64

RT65

INTELLIGENT POWER DEVICE

POWER TRANSISTOR MODULE

IPM

7

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Ambient Temperature Thermistor RT65

Discharge temperatuer thermistor RT62

Flared connection

Stop valve (with strainer)

Stop valve (with service port)

Refrigerant flow in cooling

Compressor

Muffler

4-way valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

R.V. coil heating ON cooling OFF

Strainer

Capillary tube [3.0✕[2.0✕200

Expansion valve

Muffler

Refrigerant piping

Max. length : m

A

20

Indoor unit

Gas 0.43

Liquid 0.5

Gas

9.52

Liquid

6.35

Outdoor unit

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

Model

MUZ-A09YV -

E1

MUZ-A09YVH -

E1

MUZ-A12YV -

E1

MUZ-A12YVH -

E1

REFRIGERANT SYSTEM DIAGRAM

MUZ-A09YV MUZ-A09YVH MUZ-A12YV MUZ-A12YVH -

OUTDOOR UNIT

E1

Unit:mm

MAX. REFRIGERANT PIPING LENGTH

MAX. HEIGHT DIFFERENCE

Indoor unit

w Max. Height

difference 12m

Refrigerant Piping Max. length A

Outdoor unit

w Height difference should be within 12m regardless of which unit, indoor or outdoor position is high.

11

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

Outdoor unit

precharged

800

900

14m

270

7m

0

6m

0

5m

0

11m

180

Model

Refrigerant piping length (one way)

Calculation : Xg=30g/mo(Refrigerant piping length(m) - 5)

8m

90

9m

120

10m

150

12m

210

13m

240

15m

300

20m

450

MUZ-A09YV - E1 MUZ-A09YVH -

E1

MUZ-A12YV - E1 MUZ-A12YVH - E1

PERFORMANCE CURVES8

MUZ-A09YV - MUZ-A12YV MUZ-A09YVH - MUZ-A12YVH -

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

(1) GUARANTEED VOLTAGE

198 ~ 264V, 50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °C WB (2) Indoor outlet air wet-bulb temperature : °C WB (3) Outdoor intake air dry-bulb temperature : °C DB (4) Total input: W (5) Indoor intake air dry-bulb temperature : °C DB (6) Outdoor intake air wet-bulb temperature : °C WB (7) Total input : W

Indoor air wet/dry-bulb temperature difference on the left side of the chart on next page shows the difference between the

indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

E1E1

Cooling

}

Heating

}

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.

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