Mitsubishi Electric MUZ-GA50VA-E1 Manuale utente

SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ··································· 3

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

3. SPECIFICATION················································ 6

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

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

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

7. REFRIGERANT SYSTEM DIAGRAM ············· 12

8. PERFORMANCE CURVES ····························· 15

9. ACTUATOR CONTROL··································· 26

10. SERVICE FUNCTIONS···································· 27

11. TROUBLESHOOTING ····································· 27

12. DISASSEMBLY INSTRUCTIONS···················· 46

13. PARTS LIST····················································· 50

14. RoHS PARTS LIST·········································· 52

Models

SPLIT-TYPE AIR CONDITIONERS

MUZ-GA50VA - E1

MUZ-GA60VA - E1

MUZ-GA60VA - E2

MUZ-GA60VA - E3

MUZ-GA71VA - E1

MUZ-GA71VA - E2

HFC

utilized

R410A

NOTE:

• RoHS compliant products have <G> mark on the spec name plate.

For servicing of RoHS compliant products, refer to the RoHS Parts List.

• Contents of SERVICE FUNCTIONS (10) have been removed.

No. OB389

REVISED EDITION-H

Indoor unit service manual

MSZ-GA•VA Series (OB388)

Please void OB389 REVISED EDITION-G.

OUTDOOR UNIT

Revision H:

• Errors in TROUBLESHOOTING have

been corrected.

Revision A :

• RoHS PARTS LIST has been added.

• Failure mode recall function (11-2.) has been changed.

• Check of HPS (11-6. ) has been corrected.

Revision B:

• Compressor has been changed. (MUZ-GA50/60VA)

New

Model

SNB130FLDH

SNB130FLDH1

PARTS LIST number

E02 851 900

E02 939 900

RoHS PARTS LIST number

E12 851 900

E12 939 900

Revision C:

• MUZ-GA60/71VA- E2 have been added.

• Check of outdoor thermistors (11-6. ) has been corrected.

• Contents of SERVICE FUNCTIONS (10) have been removed as these models do not have the functions.

Revision D:

• PARTS LIST and RoHS PARTS LIST have been changed.

Revision E:

• REFRIGERANT SYSTEM DIAGRAM has been changed for MUZ-GA60VA- E2 .

Revision F:

• MUZ-GA60VA- E3 has been added.

Revision G:

• The fan guard for MUZ-GA50VA- E, MUZ-GA60VA- Eand MUZ-GA71VA- Ehas been changed.

Use the speciﬁed refrigerant only

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.

Correct refrigerant is specified in the manuals and on the spec labels provided with our products.

We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by

failure to follow the instructions.

Revision H:

• Errors in TROUBLESHOOTING have been corrected.

1TECHNICAL CHANGES

Refrigeration

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 (°C)

Steam pressure [25°C](Mpa)

Saturated steam density [25°C](kg/m3)

Combustibility

ODP 1

GWP 2

Refrigerant charge method

Additional charge on leakage

Kind

Color

Smell

1: Ozone Depletion Potential : based on CFC-11

2: Grobal Warming Potential : based on CO2

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

• This room air conditioner adopts 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.

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.

Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and

installation, since it is more susceptible to contaminations than R22.

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

piping.)

Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent

composition change.

MUZ-A18YV - E1 MUZ-GA50VA - E1

MUZ-A24YV - E1 MUZ-GA60VA - E1

MUZ-A26YV - E1 MUZ-GA71VA - E1

1. Indication of capacity has been changed. (BTU base kW base)

2. Outdoor electronic control P.C. board has been changed.

3. Noise filter P.C. board has been changed.

4. Length of fan motor lead wire has been changed.

5. Shape of relay panel has been changed.

6. Signal of terminal block has been changed.

MUZ-GA60VA - E1 MUZ-GA60VA - E2

1. Compressor has been changed. (SNB130FLDH1 SNB130FLEH1)

2. Outdoor electronic control P.C. board has been changed.

MUZ-GA71VA - E1 MUZ-GA71VA - E2

1. Outdoor electronic control P.C. board has been changed.

MUZ-GA60VA - E2 MUZ-GA60VA - E3

1. Compressor has been changed. (SNB130FLEH1 SNB130FGBH)

2. Outdoor electronic control P.C. board has been changed.

3. Refrigerant circuit has been changed.

-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/cm2[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 R410A with 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 and 15.88mm

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/cm2 [Gauge])

New Specification Current Specification

The incompatible refrigeration 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

refrigeration oil of the upper layer to flow back to the

compressor.

Since refrigerant and refrigeration oil are compatible,

refrigeration oil goes back to the compressor through the

lower position oil back hole.

Compressor

Suction muffler

Oil back hole

Refrigeration oil

Refrigerant

Compressor

Suction muffler

Oil back hole

Refrigeration oil /Refrigerant

Compressor

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

15.88

Dimension of flare nut

R22

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. Refrigeration 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, capacity of the refrigeration 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.

2. Refrigerant piping

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 (6.35, 9.52, 12.7), 1.0 mm (15.88).

Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88), as the pressure resistance is

insufficient.

Wall

thickness

Outside diameter

Pipe mm

For liquid

For gas

6.35

9.52

12.7

15.88

0.8 mm

1.0 mm

Heat resisting foam plastic

Specific gravity 0.045 Thickness 8 mm

Insulation material

PART NAMES AND FUNCTIONS

Air inlet

Piping

Air outlet

(back and side)

Drain hose

Drain outlet

ACCESSORIES

Drain socket

Drain cap Ø33

Single phase

230V,50Hz

7.46

0.30

SNB130FLDH or SNB130FLDH1

850

U-V 0.45 W-U 0.45

V-W 0.45

RC0J60-AA

BLK-WHT 15.2

WHT-RED 15.2 RED-BLK15.2

840x850x330

1.8

NEO22

Cooling

5.0(0.9-5.9)

2.5

2,940/1,650

6.23

1,410

98.4

5.93

3.42

53/51

800/480

Heating

5.9(0.9-7.8)

—

2,940/2,210

7.01

1,580

98.0

6.71

3.62

55/53

800/620

Outdoor model

Function

Power supply

Capacity Rated frequency (Min.-Max.)

Dehumidification

Air flow (High/Low)

Breaker capacity

Running current

Power input

Power factor

Starting current 1

Compressor motor current 1

Fan motor current

Model

Output

Winding

resistance(at 20°C)

Model

Winding

resistance (at 20°C)

Dimensions WxHxD

Weight

Sound level (High/Low)

Fan speed (High/Low)

Fan speed regulator

Refrigerant filling

capacity (R410A)

Refrigeration oil (Model)

m3/h

rpm

Compressor

Fan

motor

Special

remarks

Coefficient of performance(C.O.P) 1

Capacity

Electrical

data

Single phase

230V,50Hz

11.2

0.30

TNB220FMCH

1,300

U-V 1.41 W-U 1.41

V-W 1.41

RC0J60-AA

BLK-WHT 15.2

WHT-RED 15.2 RED-BLK15.2

840x850x330

2.0

NEO22

Heating

8.1(0.9-9.6)

—

2,940/2,210

10.6

2,390

98.0

10.3

3.31

55/53

800/620

MUZ-GA71VA

Single phase

230V,50Hz

8.93

0.30

SNB130FLDH or SNB130FLDH1

SNB130FLEH1

SNB130FGBH

850

U-V 0.45 W-U 0.45

V-W 0.45

RC0J60-AA

BLK-WHT 15.2

WHT-RED 15.2 RED-BLK15.2

840x850x330

1.8

NEO22

Cooling

6.0(0.9-6.7)

3.0

2,940/1,650

8.23

1,870

98.8

7.93

3.11

53/51

800/480

Heating

6.8(0.9-8.1)

—

2,940/2,210

8.33

1,880

98.1

8.03

3.51

55/53

800/620

MUZ-GA60VA

MUZ-GA50VA

Cooling

7.1(0.9-8.3)

3.8

2,940/1,650

10.4

2,360

98.7

10.1

2.93

53/51

800/480

NOTE: Test conditions are based on ISO 5151.

Cooling: Indoor Dry bulb temperature 27 Wet bulb temperature 19

Outdoor Dry bulb temperature 35 Wet bulb temperature (24 )

Heating: Indoor Dry bulb temperature 20 Wet bulb temperature 15

Outdoor Dry bulb temperature 7 Wet bulb temperature 6

Refrigerant piping length (one way): 5m

1 Measured under rated operating frequency.

3SPECIFICATION

MUZ-GA50VA

MUZ-GA60VA

MUZ-GA71VA

NOISE CRITERIA CURVES

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

MUZ-GA50VA

MUZ-GA60VA

MUZ-GA71VA

OUTDOOR UNIT

MICROPHONE

COOLING

FUNCTION SPL(dB(A)) LINE

High

FAN SPEED

HEATING

Test conditions

Cooling: Dry-bulb temperature 35°C

Wet-bulb temperature (24°C)

Heating: Dry-bulb temperature 7°C

Wet-bulb temperature 6°C

Model

Item

Smoothing capacitor

Current transformer

Fuse

Intelligent power module

High pressure switch

Intelligent power module

Reactor

Expansion valve coil

Power factor controller

Resistor

Solenoid coil relay

Terminal block

Relay

R.V. coil

MUZ-GA50VA

(CB1,2,3)

(CT1,2)

(CT61)

(F64)

(F801)

(F911)

(HC930)

(HPS)

(IPM)

(L)

(LEV)

(PFC)

(R64A,B)

(R937A,B)

(RS1~4)

(SSR61)

(TB1)

(TB2)

(X64)

(21S4)

MUZ-GA60VA MUZ-GA71VA

560μF 450V

ETQ19Z68AY

ETQ19Z53AY

250V 2A

250V 3.15A

250V 1A

PS21661-RZ

ACB-DB156 (for )

PS21244-A

340μH 20A

DC 12 V

PS51259-A

10Ω10W

1.1Ω2W 2%

0.04Ω7W

TLP3506

G4A

AC 220 ~ 240 V

ACB-DB156

–

Specifications and rated conditions of main electric parts

5OUTLINES AND DIMENSIONS

Unit: mm

MUZ-GA50VA

MUZ-GA60VA

MUZ-GA71VA

30°

35°

155

198

515

299

330

360

850

430

500

121

840

Open as a rule

500 mm or more if

the front and both

sides are open

100 mm or more

200 mm or more if

there are obstacles

to both sides

Open as a rule

500 mm or more if the back,

both sides and top are open 350 mm or more

100 mm or more

Service panel

Gas refrigerant

pipe joint

Refrigerant pipe

(flared) Ø12.7 (MUZ-GA50)

Ø15.88 (MUZ-GA60/71)

Liquid refrigerant

pipe joint

Refrigerant pipe

(flared) Ø6.35 (MUZ-GA50/60)

Ø9.52 (MUZ-GA71)

REQUIRED SPACE

WIRING DIAGRAM

R64B

YLW

230V~

12-24V

CN912

CN663

WHT

BLU

NOISE

FILTER

P.C.BOARD

BRN

TO INDOOR

UNIT

CONNECTING

RED

RT65

CN61

GRN/YLW

PFC

GRN

LD9

POWER

BOARD

RT64

CN3

RED

WHT

RS2

RS1

R64A

RS3

RS4

F801

CN901

NR64

ELECTRONIC

CONTROL

P.C.BOARD

CB1

CB2

CB3

HC930

IPM

BLK

WHT

RED

YLW

BLU

ORN

PNK

GRY

BLU

WHT

GRN

BLU

BLK

RED

BLU

CT2

CT1

SSR61

CN7954123 78

CN661

CN4

TB2

CN601

1 567

CN702

5321

CN781

CN701

CN931

LD1LD2

T801

R937A

R937B

CN801

231 34512

CN932

3X64

5123

LDE2

CT61

TAB1

F64

F911

LDE1

21S4

POWER SUPPLY

~/N 230V 50Hz

TAB2

TB1

CIRCUIT

BREAKER

RED

YLW

RED

CN903

CN902

CN5

6543 1

CN2

TAB4 V

WHT

RT61 RT62 RT68

LEV

:Terminal block :Connector

3.Symbols below indicate.

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

diagram for servicing.

refer to the indoor unit electric wiring

1.About the indoor side electric wiringNOTES:

SYMBOL

NAME

SYMBOL

NAME

CURRENT TRANSFORMER

FUSE (T1AL 250V)

LEV EXPANSION VALVE COIL

LREACTOR

IPM INTELLIGENT POWER MODULE

CT61

FUSE (T2AL 250V)

F64

CT1, 2 CURRENT TRANSFORMER

HC930 INTELLIGENT POWER MODULE

F911

F801 FUSE (T3.15AL 250V)

SMOOTHING CAPACITOR

CB1~3

OUTDOOR FAN MOTOR

POWER FACTOR CONTROLLER

NOISE FILTER

RT61

DISCHARGE TEMPERATURE THERMISTOR

RS1~4 RESISTOR

R937A, B

RESISTOR

MC COMPRESSOR

R64A,B RESISTOR

PFC

NR64 VARISTOR

AMBIENT TEMPERATURE THERMISTOR

SOLENOID COIL RELAY

21S4 R.V. COIL

X64 RELAY

TB1 TERMINAL BLOCK

TB2 TERMINAL BLOCK

RT65

FIN TEMPERATURE THERMISTOR

RT64

T801 TRANSFORMER

SSR61

RT68 OUTDOOR HEAT EXCHANGER

TEMPERATURE THERMISTOR

DEFROST THERMISTOR

RT62

NAME

SYMBOL

MUZ-GA50VA

MUZ-GA60VA - E1

MUZ-GA60VA - E2

MUZ-GA60VA - E3

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