Mitsubishi Electric MUZ-GA35VA-E3 User manual

SERVICE MANUAL

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················7

3. SPECIFICATION·················································8

4. NOISE CRITERIA CURVES·····························10

5. OUTLINES AND DIMENSIONS························11

6. WIRING DIAGRAM ··········································12

7. REFRIGERANT SYSTEM DIAGRAM··············20

8. PERFORMANCE CURVES······························23

9. ACTUATOR CONTROL····································31

10. SERVICE FUNCTIONS·····································32

11. TROUBLESHOOTING······································32

12. DISASSEMBLY INSTRUCTIONS·····················53

13. PARTS LIST······················································56

14. RoHS PARTS LIST···········································60

Wireless type

Models

SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS

MUZ-GA25VA

MUZ-GA35VA

MUZ-GA25VAH

MUZ-GA35VAH

-E3

NOTE:

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

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

HFC

utilized

R410A

Please void OB379 REVISED EDITION-D.

No. OB379

REVISED EDITION-E

Revision E:

•MUZ-GA35VA(H) - has been added.

OUTDOOR UNIT

Indoor unit service manual

MSZ-GA•VA Series (OB378)

MSZ-CB•VA Series (OB441)

OB379E--1qxp 07.5.30 3:40 PM Page 1

Revision A:

•Alternative inverter P.C.board has been added(Refer to 11-7.1. Inverter P.C.board (Alternative)). FUSE F901 has been

equipped to MUZ-GA35.

•model has been added.

Quick clean kit has been removed.

Model 6. Wiring diagram

11-6.N Check of inverter P.C.board

Change Change

MUZ-GA25VA

MUZ-GA25VAH

MUZ-GA35VA

MUZ-GA35VAH

No change No change

Revision B:

•MUZ-GA25VA(H)- has been added.

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

•RoHS PARTS LIST has been added.

Revision C:

•MUZ-GA25VA(H)- has been added.

•Solenoid valve coil has been removed.

(MUZ-GA25VA- :Serial No. 6021351T~ , MUZ-GA25VAH- :Serial No. 7000001T~)

E3E3

Revision D:

•PARTS LIST and RoHS PARTS LIST have been changed.

Revision E:

•MUZ-GA35VA(H) - has been added.

1TECHNICAL CHANGES

MUZ-A09YV - ➔MUZ-GA25VA -

MUZ-A09YVH - ➔MUZ-GA25VAH - E1E1

E1E1

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

2.Control method between indoor and outdoor unit has been changed.

3.Power supply method has been changed (change to supply from outdoor unit).

4.Terminal block for power supply has been added.

5.Power P.C. board has been changed.

6.Inverter P.C. board has been changed.

7.Refrigerant circuit has been changed.

•Compressor has been changed.(KNB073FBVH➔KNB065FDTH)

•LEV has been removed and capillary tube has been added.

•Bypass circuit for low outside temperature operation has been added.

•Specification and position of muffler have been changed.

•Path of outdoor heat exchanger has been changed.

•4-way valve and R.V. coil have been changed.

•Stop valve has been changed.

8.Fan motor has been changed. (AC)

9.Shape of grille has been changed.

10.Shape of service panel has been changed.

11.Shape of propeller has been changed.

12.Quick Clean Kit has been added.

13.Symbol on terminal block has been changed (to S1/S2/S3).

OB379E--1qxp 07.5.30 3:40 PM Page 2

MUZ-A12YV - ➔MUZ-GA35VA -

MUZ-A12YVH - ➔MUZ-GA35VAH - E1E1

E1E1

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

2.Control method between indoor and outdoor unit has been changed.

3.Power supply method has been changed (change to supply from outdoor unit).

4.Terminal block for power supply has been added.

5.Power P.C. board has been changed.

6.Inverter P.C. board has been changed.

7.Refrigerant circuit has been changed.

•Compressor has been changed.(KNB092FAAH➔KNB073FDVH)

•Specification and position of muffler have been changed.

•Path of outdoor heat exchanger has been changed.

•4-way valve and R.V. coil have been changed.

•Stop valve has been changed.

8.Fan motor has been changed.(AC➔DC)

9.Shape of grille has been changed.

10.Shape of service panel has been changed.

11.Shape of propeller has been changed.

12.Quick Clean Kit has been added.

13.Symbol on terminal block has been changed (to S1/S2/S3).

MUZ-GA25VA - ➔MUZ-GA25VA -

MUZ-GA25VAH - ➔MUZ-GA25VAH -

MUZ-GA35VA - ➔MUZ-GA35VA -

MUZ-GA35VAH - ➔MUZ-GA35VAH - E2E1

E2E1

1.Quick clean kit has been removed.

MUZ-GA25VA - ➔MUZ-GA25VA -

MUZ-GA25VAH - ➔MUZ-GA25VAH - E3E2

E3E2

1.Capillary tube for heating has been added.

2.Solenoid valve coil has been removed.(GA25VA- :Serial No. 6021351T~ , GA25VAH- :Serial No. 7000001T~)

E3E3

MUZ-GA25VA - ➔MUZ-GA25VA -

MUZ-GA25VAH - ➔MUZ-GA25VAH - E4E3

E4E3

1.Refrigerant circuit has been changed.

2.Solenoid valve coil has been removed.

MUZ-GA35VA - ➔MUZ-GA35VA -

MUZ-GA35VAH - ➔MUZ-GA35VAH - E3E2

E3E2

1.Power P.C.board has been changed.

2.Inverter P.C.board has been changed.

3.Compressor has been changed. (KNB073FDVH ➔KNB073FGDH)

OB379E--1qxp 07.5.30 3:40 PM Page 3

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 (:)

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 Depletion Potential : based on CFC-11

w2 :Global 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.

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 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

OB379E--1qxp 07.5.30 3:40 PM Page 4

-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

OB379E--1qxp 07.5.30 3:40 PM Page 5

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.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.

OB379E--1qxp 07.5.30 3:40 PM Page 6

ACCESSORIES

Air inlet

Air outlet

Drain outlet

Piping

Drain hose

(back and side)

1Drain socket 1

2Quick clean kit 1

MUZ-GA25VA - E1

MUZ-GA35VA - E1

–

MUZ-GA25VAH - E1

MUZ-GA35VAH - E1

MUZ-GA25VA - E2

MUZ-GA25VA - E3

–

MUZ-GA25VAH - E2

MUZ-GA25VAH - E3

MUZ-GA25VA - E4

MUZ-GA35VA - E2 MUZ-GA25VAH - E4

MUZ-GA35VAH - E2

MUZ-GA35VA - E3 MUZ-GA35VAH - E3

––

MUZ-GA25VA MUZ-GA35VA

MUZ-GA25VAH MUZ-GA35VAH

PART NAMES AND FUNCTIONS

OB379E--1qxp 07.5.30 3:40 PM Page 7

Single phase

230V,50Hz

1,890

3.6

0.24

KNB065FDTH

500

V-W 1.88

RA6V21-AB

WHT-BLK 347

BLK-RED 281

800o550o285

810

0.85

320 (NEO22)

Cooling

2.5 (0.9-3.0)

1.4

2.95

607

2.71

3.91

U-V 1.88

Heating

3.2 (0.9-4.5)

—

3.35

727

3.11

4.21

U-W 1.88

MUZ-GA25VA

MUZ-GA25VAH

Single phase

230V,50Hz

5.0

550

RC0J50-AL

WHT-BLK 37.5

BLK-RED 37.5

RED-WHT 37.5

800o550o285

0.90

320 (NEO22)

Cooling

3.5 (1.0-3.9)

2.0

2,058

4.75

1,047

4.44

0.31

3.24

810/750

Heating

4.0 (0.9-5.0)

—

2,178

4.55

1,022

4.20

0.35

3.79

880/810/650

Outdoor model

Function

Power supply

Capacity Rated frequency(Min.-Max.)

Dehumidification

Air flow ✽1

Power outlet

Running current ✽1

Power input ✽1

Power factor ✽1

Starting current ✽1

Compressor motor current ✽1

Fan motor current ✽1

Model

Output

Winding

resistance(at 20:)

Model

Winding

resistance(at 20:)

Dimensions WOHOD

Weight

Sound level ✽1

Fan speed(High/Low, High/Med./Low)

Fan speed regulator

Refrigerant filling

capacity(R410A)

Refrigeration oil (Model)

r/h

K/h

✽1

dB(A)

rpm

Compressor

Fan

motor

Special

remarks

Coefficient of performance(C.O.P)

Capacity

Electrical

data

MUZ-GA35VA

MUZ-GA35VAH

E1 E2

U-V 1.53

U-W 1.53

W-V 1.53

U-V 1.70

U-W 1.70

W-V 1.70

KNB073FDVH

KNB073FGDH

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

OB379E--1qxp 07.5.30 3:40 PM Page 8

Model

Item

Current transformer

Smoothing capacitor

Diode module

Fuse

Defrost heater

Intelligent power module

Expansion valve coil

Reactor

Current-detecting resistor

Current-limiting resistor

Terminal block

Relay

R.V. coil

Solid state relay

Solenoid valve coil

Heater protector

Outdoor fan motor thermal fuse

MUZ-GA25VA

(CT)

(CT761, CT781)

(

C63A, C63B, C63C

)

(DB61, DB65)

(F61)

(F71, F801)

( F901 w1)

(H)

(IPM)

(LEV)

(L61)

(R61)

(R831)

(

R64A, R64B

)

(TB1,TB2)

(X63)

(X64)

(X66)

(X69)

(21S4)

(SR61)

(21R1)

(26H)

MUZ-GA25VAH MUZ-GA35VA MUZ-GA35VAH

ETA19Z59BZ

ETQ19Z71AY

620+ 420V

D25XB60

250V 20A

250V 3.15A

PS21244-A-203

10A 23.0mH

25m"5W

10"5W

G5NB-1a

G4A-1A-PS

—

230V 130W

G5NB-1a

Open 45:

—

230V 130W

G5NB-1a

Open 45:

45m"5W (1 element)

250V 3.15A

CAM-MD12ME 12VDC

—

STF-01AJ503

—

G5NB-1a(for E1 /E2 /E3 )

SHF-4-10W5

G3MC-202PL

FQ-208-RK (for E1 /E2 /E3 w2)

Open 152:

Specifications and rating conditions of main electric parts

w1 Refer to Revision A.

w2 MUZ-GA25VA- (Serial No. ~6021350T)

MUZ-GA25VAH- (Serial No. ~7000000T)

OB379E--1qxp 07.5.30 3:40 PM Page 9

NOISE CRITERIA CURVES

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

HEATING

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

MUZ-GA25VA

MUZ-GA25VAH

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

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

COOLING

FUNCTION SPL(dB(A)) LINE

FAN SPEED

HEATING

Test conditions

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

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

OUTDOORUNIT

MICROPHONE

High

Med.

MUZ-GA35VA

MUZ-GA35VAH

OB379E--1qxp 07.5.30 3:40 PM Page 10

This manual suits for next models

Table of contents

Other Mitsubishi Electric Air Conditioner manuals

Mitsubishi Electric

Mitsubishi Electric Mr.SLIM PCA-M35KA User manual

Mitsubishi Electric

Mitsubishi Electric CITY MULTI PEFY-WP10VMS1-E Operating manual

Mitsubishi Electric

Mitsubishi Electric MUZ-AP VG Series User manual

Mitsubishi Electric

Mitsubishi Electric CITY MULTI PFLY Series Operating manual

Mitsubishi Electric

Mitsubishi Electric PEAD-RP35JA User manual

Mitsubishi Electric

Mitsubishi Electric PEA-RP170 User manual

Mitsubishi Electric

Mitsubishi Electric Mr.Slim PUZ-A18NHA4 User manual

Mitsubishi Electric

Mitsubishi Electric ecodan EHST17D-VM2D User manual

Mitsubishi Electric

Mitsubishi Electric Mr. Slim PK-2.5FLA User manual

Mitsubishi Electric

Mitsubishi Electric MXZ-SM48NAM Operating manual

Mitsubishi Electric

Mitsubishi Electric PUHZ-HRP71VHA User manual

Mitsubishi Electric

Mitsubishi Electric Mr. SLIM MSY-JS18VF User manual

Mitsubishi Electric

Mitsubishi Electric Mr.Slim MSZ-A24NA User manual

Mitsubishi Electric

Mitsubishi Electric PAC-MK53BC User manual

Mitsubishi Electric

Mitsubishi Electric Mr.Slim PUHZ-FRP71VHA User manual

Mitsubishi Electric

Mitsubishi Electric Mr.SLIM PLA-RP BA Instruction manual

Mitsubishi Electric

Mitsubishi Electric MUFZ-KW25VG-E1 User manual

Mitsubishi Electric

Mitsubishi Electric MXZ-4E72VA-E1 User manual

Mitsubishi Electric

Mitsubishi Electric MSZ-BT35VG User manual

Mitsubishi Electric

Mitsubishi Electric MU-GA20VB-E1 User manual

Mitsubishi Electric

Mitsubishi Electric MSZ-D30NA User manual

Mitsubishi Electric

Mitsubishi Electric PEAD-A24AA4 User manual

Mitsubishi Electric

Mitsubishi Electric SEZ-KC25VA.W Operating manual

Mitsubishi Electric

Mitsubishi Electric PLA-ZP.EA series User manual

Popular Air Conditioner manuals by other brands

Panasonic

Panasonic CS-E12HKEW operating instructions

Samsung

Samsung AVMFC052EA0(4) null

Haier

Haier HSU-09H03/R null

Haier

Haier HSU-24C03 null

Samsung

Samsung AVMCH052CA1 null

nedis

nedis ACMB1WT7 quick start guide

Daikin

Daikin FCFV50A Operation manual

Fujitsu

Fujitsu Inverter ASBA30JFC operating manual

Toshiba

Toshiba RAS-M10SMUV-E installation manual

Daikin

Daikin FXLQ20MAVE Operation manual

CIAT

CIAT Magister 2 Series Installation, Operation, Commissioning, Maintenance

Bestron

Bestron AAC6000 instruction manual

Frigidaire

Frigidaire FFRE0533S1E0 Use & care guide

Samsung

Samsung AS09HM3N user manual

Frigidaire

Frigidaire CRA073PU11 use & care

Soleus Air

Soleus Air GB-PAC-08E4 operating instructions

McQuay

McQuay MCK020A Technical manual

Webasto

Webasto Frigo Top 25 DS Instructions for use