Mitsubishi Electric GA MUZ-GA25VA, GA MUZ-GA35VA, GA MUZ-GA25VAH, GA MUZ-GA35VAH air conditioner Service manual

OB379 --1qxp 05.1.17 16:39 Page 1

Mitsubishi ilmalämpöpumput huoltaa ja korjaa: Jäähdytinpalvelu RefGroup Oy

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

Wireless type

Models

MUZ-GA25VA -

MUZ-GA35VA -

E1

E1

MUZ-GA25VAH -

MUZ-GA35VAH -

E1

E1

HFC utilized

R410A

No. OB379

Indication of model name

MUZ-GA25VA -

MUZ-GA35VA -

E1

E1

MUZ-GA25VAH -

E1

MUZ-GA35VAH -

E1

CONTENTS

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

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

3. SPECIFICATION·················································7

4. NOISE CRITERIA CURVES ·······························9

5. OUTLINES AND DIMENSIONS ·······················10

6. WIRING DIAGRAM···········································11

7. REFRIGERANT SYSTEM DIAGRAM ··············15

8. PERFORMANCE CURVES ······························17

9. ACTUATOR CONTROL····································25

10. SERVICE FUNCTIONS·····································26

11. TROUBLESHOOTING ······································26

12. DISASSEMBLY INSTRUCTIONS·····················45

13. PARTS LIST······················································48

NOTE:

This service manual describes technical data of the outdoor units.

•As for indoor units MSZ-GA22VAE1 , MSZ-GA25VAE1 and MSZ-GA35VAE1 , refer to the service manual OB378.

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OB379 --1qxp 05.1.17 16:39 Page 2


1 TECHNICAL CHANGES

MUZ-A09YV -

E1

MUZ-A09YVH -

E1

➔ MUZ-GA25VA -

E1

➔ MUZ-GA25VAH -

E1

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).

MUZ-A12YV -

E1

MUZ-A12YVH -

E1

➔ MUZ-GA35VA -

E1

➔ MUZ-GA35VAH -

E1

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).

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OB379 --1qxp 05.1.17 16:39 Page 3


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.

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 R410A refrigerant 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.

New refrigerant

Refrigerant

Composition (Ratio)

Refrigerant handling

R410A

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

Pseudo-azeotropic refrigerant

Not included Chlorine

Safety group (ASHRAE)

Molecular weight

Boiling point ( : )

Steam pressure [25

Combustibility

ODP

GWP w w

1

2

: ](Mpa)

Saturated steam density [25 : ](Kg/ K )

Refrigerant charge method

Additional charge on leakage

Kind

Color

Smell w 1 :Ozone Destruction Parameter : based on CFC-11 w 2 :Global Warmth Parameter : based on CO

2

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

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.

Suction muffler

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

Suction muffler

Compressor

Oil back hole

Refrigeration oil

Compressor

Oil back hole

Refrigerant Refrigeration oil /Refrigerant

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/ f [Gauge])


OB379 --1qxp 05.1.17 16:39 Page 4


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

0.0

R410A

R22

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


-0.5

-30 -20 -10 0 10 20 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.

R410A tools Can R22 tools be used?

Gauge manifold

Charge hose

Gas leak detector

Torque wrench

Flare tool

Flare gauge

Vacuum pump adapter

Electronic scale for refrigerant charging

No

No

No

Yes

No

Yes

New

New

New

Description

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

12.7 mm

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 : Not Substitutable for R410A Yes : Substitutable for R410A

2.Refrigerant piping

1 Specifications

Use the refrigerant pipes that meet the following specifications.

Pipe

For liquid

For gas

Outside diameter mm

6.35

9.52

12.7

Wall thickness

0.8 mm

0.8 mm

0.8 mm

Insulation material

Heat resisting foam plastic

Specific gravity 0.045 Thickness 8 mm

• 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.


OB379 --1qxp 05.1.17 16:39 Page 5


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”.

Pipe diameter mm

6.35

9.52

12.7

R410A

17

22

26

Dimension of flare nut

R22

17

22

24

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 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.

Union

Stop valve

Indoor unit

Liquid pipe

Gas pipe

Outdoor unit

Refrigerant gas cylinder operating valve

Service port

Gauge manifold valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging


OB379 --1qxp 05.1.17 16:39 Page 6


2 PART NAMES AND FUNCTIONS

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

OUTDOOR UNIT

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

ACCESSORIES

1 Drain socket

2 Quick clean kit

MUZ-GA25VA E1

MUZ-GA35VA E1

1

1

MUZ-GA25VAH E1

MUZ-GA35VAH E1

–

1


OB379 --1qxp 05.1.17 16:39 Page 7


3 SPECIFICATION

Outdoor model

MUZ-GA25VA E1

MUZ-GA25VAH E1

MUZ-GA35VA E1

MUZ-GA35VAH E1

Function

Power supply

Capacity Rated frequency(Min.-Max.) kW

Dehumidification

Air flow ✽ 1 r

K

/h

/h

Starting current ✽ 1 A

Compressor motor current ✽ 1

Fan motor current ✽ 1

A

A

Coefficient of performance(C.O.P) ✽ 1

Cooling Heating

Single phase

1.4

2.71

230V,50Hz

2.5 (0.9-3.0)

1,890

3.6

3.2 (0.9-4.5)

0.24

—

3.11

Cooling Heating

Single phase

2.0

4.44

0.31

230V,50Hz

3.5 (1.0-3.9)

2,058

4.0 (0.9-5.0)

5.0

—

2,178

4.20

0.35

3.91

500

4.21

KNB065FDTH

3.24

3.79

Model

Output W

KNB073FDVH

550

U-V 1.53

U-W 1.53

Winding resistance(at 20 : )

Model

Winding resistance(at 20 : )

"

" mm kg dB(A) rpm

U-V 1.88

U-W 1.88

V-W 1.88

RA6V21-AB

WHT-BLK 347

BLK-RED 281

V-W 1.53

RC0J50-AL

WHT-BLK 37.5

BLK-RED 37.5

Dimensions W

Weight

Sound level ✽ 1

Fan speed(High

W

/Low

W

O H

, High

O D

W

/Med.

W

/Low

W

)

800 o 550 o 285

31

46

810

1

RED-WHT 37.5

800 o 550 o 285

33

47

810

W

/750

W

48

880

W

/810

W

/650

W

2 3

Fan speed regulator

Refrigerant filling

Thermistor RT61(at 0 : )

Thermistor RT62(at 100 : ) kg cc k " k " k "

0.85

320 (NEO22)

32.6

13.4

17

10

0.90

capacity(R410A)

Refrigeration oil (Model)

Thermistor RT64(at 50

Thermistor RT65(at 25

:

: )

) k "

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 w Reference value

320 (NEO22)

32.6

13.4

17

10


OB379 --1qxp 05.1.17 16:39 Page 8


Specifications and rating conditions of main electric parts

OUTDOOR UNIT

Item

Model

MUZ-GA25VA - E1 MUZ-GA25VAH - E1 MUZ-GA35VA - E1 MUZ-GA35VAH -

Current transformer

Fuse

(CT)

(F61)

ETA19Z59BZ

ETQ19Z71AY

620 + 420V

D25XB60

250V 20A

Defrost heater (H) — 230V 130W

250V 3.15A

PS21244-A-203

— 230V 130W

Expansion valve coil

Reactor

Current-detecting resistor

(LEV)

(L61)

(R61)

—

10A 23.0mH

CAM-MD12ME 12VDC

45m " 5W (1 element)

Current-detecting resistor

Current-limiting resistor (R64A, R64B)

Terminal block (TB1,TB2)

Relay

Relay

Relay

(R831)

(X63)

(X64)

(X66) — G5NB-1a

Relay

R.V. coil

(X69)

(21S4)

G5NB-1a

SHF-4-10W5

Solid state relay (SR61) G3MC-202PL

Solenoid valve coil (21R1) FQ-208-RK

Heater protector (26H) —

Outdoor fan motor thermal fuse :

Open 45 :

25m

10 "

"

5W

3P

5W

G5NB-1a

G4A-1A-PS

—

—

—

STF-01AJ503

—

—

—

G5NB-1a

Open 45 :

E1


OB379 --1qxp 05.1.17 16:39 Page 9


4 NOISE CRITERIA CURVES

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

FUNCTION SPL(dB(A))

COOLING 46

HEATING 46

LINE

Test conditions,

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

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

90

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125

NC-20

250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

FAN SPEED FUNCTION SPL(dB(A))

COOLING 47

High

Med.

HEATING 48

LINE

Test conditions,

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

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

90

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125

NC-20

250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

OUTDOORUNIT

1m

MICROPHONE


OB379 --1qxp 05.1.17 16:39 Page 10


5 OUTLINES AND DIMENSIONS

MUZ-GA25VA -

E1

MUZ-GA35VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VAH -

E1

OUTDOOR UNIT

Unit: mm

REQUIRED SPACE

Drain hole [ 42 (MUZ-GA25/GA35VA)

Drain hole [ 33 (MUZ-GA25/GA35VAH) 100mm or more

400

Air in

Air in

22.3

2 holes 10X21

Air out

Handle

150

302.5

500 Bolt pitch for installation

800

40

69

23

200mm or more

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

Service panel

170.5

Service port

Liquid refrigerant pipe joint

Refrigerant pipe (flared) [ 6.35

35

-

43

Gas refrigerant pipe joint

Refrigerant pipe (flared) [ 9.52

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

100mm or more

350mm or more


OB379 --1qxp 05.1.17 16:39 Page 11


6 WIRING DIAGRAM

MUZ-GA25VA -

E1

OUTDOOR UNIT

MODEL WIRING DIAGRAM

BLK

GRN

CONNECTING

TO INDDOR UNIT


OB379 --1qxp 05.1.17 16:39 Page 12


MUZ-GA25VAH -

E1


OUTDOOR UNIT

GRN

BLK

CONNECTING

TO INDDOR UNIT

TB1 L


OB379 --1qxp 05.1.17 16:39 Page 13


MUZ-GA35VA -

E1

OUTDOOR UNIT


BLK

GRN

CONNECTING

TO INDDOR UNIT


OB379 --1qxp 05.1.17 16:39 Page 14


MUZ-GA35VAH -

E1


OUTDOOR UNIT

BLK

GRN

CONNECTING

TO INDDOR UNIT


OB379 --1qxp 05.1.17 16:39 Page 15


7 REFRIGERANT SYSTEM DIAGRAM

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

OUTDOOR UNIT

Refrigerant pipe [ 9.52

(with heat insulator)

Muffler

Stop valve

(with service port)

Flared connection

4-way valve

Discharge temperatuer thermistor

RT62

Muffler

Compressor

Defrost thermistor

RT61

Unit:mm

Outdoor heat exchanger

Ambient temperature thermistor

RT65

Flared connection



Stop valve

(with strainar)

Capillary tube

[ 3.0

✕[ 1.4

✕ 500

Solenoid valve

Strainer

#100

Check valve

R.V. coil heating ON cooling OFF

Capillary tube

[ 3.0

✕[ 1.4

✕ 800

Refrigerant flow in cooling

Refrigerant flow in heating

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

OUTDOOR UNIT



Muffler

Stop valve

(with service port)

Flared connection

4-way valve

Discharge temperatuer thermistor

RT62

Muffler

Compressor

Defrost thermistor

RT61

Unit:mm

Outdoor heat exchanger


RT65

Flared connection

Capillary tube

[ 3.0

✕[ 2.0

✕ 240

Expansion valve

Muffler



Stop valve

(with strainar)

Strainer

#100

R.V. coil heating ON cooling OFF

Refrigerant flow in cooling

Refrigerant flow in heating


OB379 --1qxp 05.1.17 16:39 Page 16


MAX. REFRIGERANT PIPING LENGTH

Model

MUZ-GA25VA - E1

MUZ-GA25VAH - E1

MUZ-GA35VA - E1


MAX. HEIGHT DIFFERENCE

Refrigerant piping

Max. length : m

A

20

Piping size O.D : mm

Gas Liquid

9.52

6.35

Length of connecting pipe : m

Indoor unit Outdoor unit

Gas 0.43

Liquid 0.5

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.

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

Model

Outdoor unit precharged

5m 6m 7m

Refrigerant piping length (one way)

8m 9m 10m 11m 12m 13m 14m 15m 20m

MUZ-GA25VA - E1


850 0 0 0 90 120 150 180 210 240 270 300 450

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

900 0 0 0 90 120 150 180 210 240 270 300 450

Calculation : Xg=30g/m o

(Refrigerant piping length(m) - 5)


OB379 --1qxp 05.1.17 16:39 Page 17


8 PERFORMANCE CURVES

MUZ-GA25VA -

E1

MUZ-GA35VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VAH -

E1

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

207 ~ 253V, 50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature :

(2) Indoor outlet air wet-bulb temperature :

(3) Outdoor intake air dry-bulb temperature :

°C WB

°C WB

°C DB

}

Cooling

(4) Total input:

(5) Indoor intake air dry-bulb temperature :

W

°C DB

(6) Outdoor intake air wet-bulb temperature : °C WB

}

Heating

(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.

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 OUTDOOR UNIT

Wet and dry-bulb thermometers

Wet and dry-bulb thermometers

6.4

5.8

5.3

4.9

4.4

3.9

9.1

8.3

7.6

6.8

6.1

5.5

Indoor intake air W et-bulb temperature (

:

)

Outdoor intake air Dry-bulb temperature ( : )

Indoor intake air W et-bulb temperature (

:

)

Outdoor intake air Dry-bulb temperature ( : )


OB379 --1qxp 05.1.17 16:39 Page 18


19.7

18.2

16.7

15.2

13.7

12.1

10.6

9.1

24.7

22.8

20.9

19.0

17.1

15.2

13.3

11.4

:

)

Indoor intake air Dry-bulb temperature (

:

)

Indoor intake air Dry-bulb temperature (

Outdoor intake air Wet-bulb temperature ( : ) Outdoor intake air Wet-bulb temperature ( : )

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

MUZ-GA25VA -

MUZ-GA25VAH -

E1

E1

1.5

Correction of Cooling capacity

MUZ-GA25VA -

MUZ-GA25VAH -

E1

E1

1.5

Correction of Cooling total input

MUZ-GA25VA E1

MUZ-GA25VAH E1

2.0

Correction of Heating capacity

MUZ-GA25VA -

MUZ-GA25VAH -

E1

E1

2.0

Correction of Heating total input

1.5

1.5

1.0

1.0

1.0

1.0

0.5

0.5

0.5

0.5

0.0

0 50 100 150(Hz)

The operational frequency of compressor

0.0

0 50 100 150(Hz)


0.0

0 50 100 150(Hz)


0.0

0 50 100 150(Hz)


MUZ-GA35VA -

MUZ-GA35VAH -

E1

1.5

Correction of Cooling capacity

MUZ-GA35VA -

MUZ-GA35VAH -

E1

1.5

Correction of Cooling total input

MUZ-GA35VA -

MUZ-GA35VAH -

E1

2.0

Correction of Heating capacity

MUZ-GA35VA -

MUZ-GA35VAH -

E1

2.0

Correction of Heating total input

1.5

1.5

1.0

1.0

0.5

0.5

1.0

1.0

0.5

0.5

0.0

0 50 100 150(Hz)


0.0

0 50 100 150(Hz)


0.0

0 50 100 150(Hz)


0.0

0 50 100 150(Hz)


OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

<How to operate fixed-frequency operation (Test run operation)>

1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT : Press twice).

2. Test run operation starts and continues to operate for 30 minutes.

3. Compressor operates at rated frequency in COOL mode or 58Hz in HEAT mode.

4. Indoor fan operates at High speed.

5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (Operation frequency of compressor varies).

6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on remote controller.

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



OB379 --1qxp 05.1.17 16:39 Page 19


OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

COOL operation

Dry-bulb temperature

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

2 Air flow : High speed

3 Operational frequency : 65Hz(MUZ-GA25VA, MUZ-GA25VAH)

88Hz(MUZ-GA35VA, MUZ-GA35VAH)

20

25

30

12

10

1.2

1.0

MUZ-GA25VA -

MUZ-GA25VAH -

E1

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

14 1.4

E1

65Hz

MUZ-GA35VA -

MUZ-GA35VAH -

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

14

1.4

12 1.2

88Hz

10 1.0

8 0.8

8 0.8

6 0.6

4 0.4

2 0.2

15 18 20 25 30 32 35(˚C)

50 60 70 (%)

Ambient temperature(˚C) Ambient humidity(%)

6 0.6

4 0.4

2 0.2

15 18 20 25 30 32 35(˚C)

50 60 70 (%)


4

MUZ-GA25VA -

MUZ-GA25VAH -

E1

E1

3.5

3

65Hz

2.5

2

15 18 20

50

25

60

30 32 35(˚C)

70 (%)


6

MUZ-GA35VA -

MUZ-GA35VAH -

E1

E1

88Hz

5

4

3

2

15 18 20

50

25

60

30 32 35(˚C)

70 (%)


Relative humidity(%)

50

60

70

HEAT operation

Condition indoor: Dry bulb temperature 20.0°C

Wet bulb temperature 14.5°C

Condition outdoor: Dry bulb temperature 2,7,15,20.0°C

Wet bulb temperature 1,6,12,14.5°C

MUZ-GA25VA -

MUZ-GA25VAH -

E1

E1

MUZ-GA35VA -

MUZ-GA35VAH -

3.0

4.0

58Hz

2.5

3.5

58Hz

2.0

3.0

1.5

2.5

1.0

2.0

0.5

1.5

0.0

2 5 10 15 20 25(

Ambient temperature(˚C)

: )

1.0

2 5 10 15 20 25(

Ambient temperature(˚C)

: )


OB379 --1qxp 05.1.17 16:39 Page 20


PERFORMANCE DATA COOL operation Rated frequency 65Hz

MSZ-GA25VA -

E1

: MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

CAPACITY:2.5(kW) SHF:0.79

INPUT:640(W)

OUTDOOR DB( : )

INDOOR INDOOR

DB(

25

25

25

25

24

24

24

24

22

23

23

23

21

21

22

22

: ) WB( : )

18

20

22

24

18

20

22

24

22

18

20

22

18

20

18

20

21

Q SHC SHF

2.94 1.79 0.61

3.06 1.50 0.49

2.94 1.91 0.65

3.06 1.62 0.53

3.19 1.31 0.41

2.94 2.03 0.69

3.06 1.75 0.57

3.19 1.43 0.45

2.94 2.14 0.73

3.06 1.87 0.61

3.19 1.56 0.49

3.35 1.24 0.37

2.94 2.26 0.77

3.06 1.99 0.65

INPUT

512

538

512

538

557

512

538

557

512

538

557

582

512

538

25

Q SHC SHF

2.81 1.72 0.61

2.94 1.44 0.49

2.81 1.83 0.65

2.94 1.56 0.53

3.08 1.26 0.41

2.81 1.94 0.69

2.94 1.67 0.57

3.08 1.38 0.45

2.81 2.05 0.73

2.94 1.79 0.61

3.08 1.51 0.49

3.23 1.19 0.37

2.81 2.17 0.77

2.94 1.91 0.65

INPUT

538

570

538

570

592

538

570

592

538

570

592

614

538

570

27

Q SHC SHF

2.70 1.65 0.61

2.85 1.40 0.49

2.70 1.76 0.65

2.85 1.51 0.53

3.00 1.23 0.41

2.70 1.86 0.69

2.85 1.62 0.57

3.00 1.35 0.45

2.70 1.97 0.73

2.85 1.74 0.61

3.00 1.47 0.49

3.15 1.17 0.37

2.70 2.08 0.77

2.85 1.85 0.65

INPUT

563

582

563

582

608

563

582

608

563

582

608

634

563

582

30

Q SHC SHF

2.60 1.59 0.61

2.75 1.35 0.49

2.60 1.69 0.65

2.75 1.46 0.53

2.88 1.18 0.41

2.60 1.79 0.69

2.75 1.57 0.57

2.88 1.29 0.45

2.60 1.90 0.73

2.75 1.68 0.61

2.88 1.41 0.49

3.05 1.13 0.37

2.60 2.00 0.77

2.75 1.79 0.65

INPUT

589

608

589

608

634

589

608

634

589

608

634

666

589

608

28

28

28

29

27

27

28

28

26

27

27

27

26

26

26

26

22

24

26

18

24

26

18

20

26

18

20

22

18

20

22

24

3.19 1.69 0.53

557 3.08 1.63 0.53

592 3.00 1.59 0.53

608 2.88 1.52 0.53

634

3.35 1.37 0.41

582 3.23 1.32 0.41

614 3.15 1.29 0.41

634 3.05 1.25 0.41

666

2.94 2.38 0.81

3.06 2.11 0.69

3.19 1.82 0.57

3.35 1.51 0.45

3.45 1.14 0.33

2.94 2.50 0.85

3.06 2.24 0.73

3.19 1.94 0.61

3.35 1.64 0.49

3.45 1.28 0.37

2.94 2.61 0.89

3.06 2.36 0.77

3.19 2.07 0.65

3.35 1.78 0.53

512

538

557

582

614

512

538

557

582

614

512

538

557

582

2.81 2.28 0.81

2.94 2.03 0.69

3.08 1.75 0.57

3.23 1.45 0.45

3.35 1.11 0.33

2.81 2.39 0.85

2.94 2.14 0.73

3.08 1.88 0.61

3.23 1.58 0.49

3.35 1.24 0.37

2.81 2.50 0.89

2.94 2.26 0.77

3.08 2.00 0.65

3.23 1.71 0.53

538

570

592

614

646

538

570

592

614

646

538

570

592

614

2.70 2.19 0.81

2.85 1.97 0.69

3.00 1.71 0.57

3.15 1.42 0.45

3.30 1.09 0.33

2.70 2.30 0.85

2.85 2.08 0.73

3.00 1.83 0.61

3.15 1.54 0.49

3.30 1.22 0.37

2.70 2.40 0.89

2.85 2.19 0.77

3.00 1.95 0.65

3.15 1.67 0.53

563

582

608

634

666

563

582

608

634

666

563

582

608

634

2.60 2.11 0.81

2.75 1.90 0.69

2.88 1.64 0.57

3.05 1.37 0.45

3.20 1.06 0.33

2.60 2.21 0.85

2.75 2.01 0.73

2.88 1.75 0.61

3.05 1.49 0.49

3.20 1.18 0.37

2.60 2.31 0.89

2.75 2.12 0.77

2.88 1.87 0.65

3.05 1.62 0.53

589

608

634

666

685

589

608

634

666

685

589

608

634

666

31

31

32

32

30

31

31

31

30

30

30

30

29

29

29

29

20

22

24

26

18

20

22

24

26

18

20

22

24

26

18

20

3.45 1.41 0.41

614 3.35 1.37 0.41

646 3.30 1.35 0.41

666 3.20 1.31 0.41

685

2.94 2.73 0.93

512 2.81 2.62 0.93

538 2.70 2.51 0.93

563 2.60 2.42 0.93

589

3.06 2.48 0.81

538 2.94 2.38 0.81

570 2.85 2.31 0.81

582 2.75 2.23 0.81

608

3.19 2.20 0.69

557 3.08 2.12 0.69

592 3.00 2.07 0.69

608 2.88 1.98 0.69

634

3.35 1.91 0.57

582 3.23 1.84 0.57

614 3.15 1.80 0.57

634 3.05 1.74 0.57

666

3.45 1.55 0.45

614 3.35 1.51 0.45

646 3.30 1.49 0.45

666 3.20 1.44 0.45

685

2.94 2.85 0.97

512 2.81 2.73 0.97

538 2.70 2.62 0.97

563 2.60 2.52 0.97

589

3.06 2.60 0.85

538 2.94 2.50 0.85

570 2.85 2.42 0.85

582 2.75 2.34 0.85

608

3.19 2.33 0.73

557 3.08 2.24 0.73

592 3.00 2.19 0.73

608 2.88 2.10 0.73

634

3.35 2.04 0.61

582 3.23 1.97 0.61

614 3.15 1.92 0.61

634 3.05 1.86 0.61

666

3.45 1.69 0.49

614 3.35 1.64 0.49

646 3.30 1.62 0.49

666 3.20 1.57 0.49

685

2.94 2.97 1.01

512 2.81 2.84 1.01

538 2.70 2.73 1.01

563 2.60 2.63 1.01

589

3.06 2.73 0.89

538 2.94 2.61 0.89

570 2.85 2.54 0.89

582 2.75 2.45 0.89

608

3.19 2.45 0.77

557 3.08 2.37 0.77

592 3.00 2.31 0.77

608 2.88 2.21 0.77

634

3.35 2.18 0.65

582 3.23 2.10 0.65

614 3.15 2.05 0.65

634 3.05 1.98 0.65

666

3.45 1.83 0.53

614 3.35 1.78 0.53

646 3.30 1.75 0.53

666 3.20 1.70 0.53

685

2.94 3.08 1.05

512 2.81 2.95 1.05

538 2.70 2.84 1.05

563 2.60 2.73 1.05

589

3.06 2.85 0.93

538 2.94 2.73 0.93

570 2.85 2.65 0.93

582 2.75 2.56 0.93

608

32

32

22

24

3.19 2.58 0.81

3.35 2.31 0.69

557

582

3.08 2.49 0.81

3.23 2.23 0.69

592

614

3.00 2.43 0.81

3.15 2.17 0.69

608

634

2.88 2.33 0.81

3.05 2.10 0.69

634

666

32 26 3.45 1.97 0.57

614 3.35 1.91 0.57

646 3.30 1.88 0.57

666 3.20 1.82 0.57

685

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


OB379 --1qxp 05.1.17 16:39 Page 21



MSZ-GA25VA -

E1

: MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1


INPUT:640(W)

INDOOR INDOOR

DB ( : ) WB ( : )

OUTDOOR DB( : )

35 40 46

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

28

28

28

29

27

27

28

28

26

27

27

27

26

26

26

26

25

25

25

25

24

24

24

24

22

23

23

23

21

21

22

22

18

20

18

20

22

18

20

22

18

20

22

24

18

20

22

24

18

20

22

24

26

18

20

22

24

26

18

20

22

24

26

18

2.45 1.49 0.61

2.58 1.26 0.49

2.45 1.59 0.65

2.58 1.36 0.53

2.73 1.12 0.41

2.45 1.69 0.69

2.58 1.47 0.57

2.73 1.23 0.45

2.45 1.79 0.73

2.58 1.57 0.61

2.73 1.34 0.49

2.88 1.06 0.37

2.45 1.89 0.77

2.58 1.67 0.65

2.73 1.44 0.53

2.88 1.18 0.41

2.45 1.98 0.81

2.58 1.78 0.69

2.73 1.55 0.57

2.88 1.29 0.45

3.03 1.00 0.33

2.45 2.08 0.85

2.58 1.88 0.73

2.73 1.66 0.61

2.88 1.41 0.49

3.03 1.12 0.37

2.45 2.18 0.89

2.58 1.98 0.77

2.73 1.77 0.65

2.88 1.52 0.53

3.03 1.24 0.41

2.45 2.28 0.93

627

653

627

653

678

627

653

678

627

653

678

704

627

653

678

704

627

653

678

704

730

627

653

678

704

730

627

653

678

704

730

627

2.25 1.37 0.61

2.40 1.18 0.49

2.25 1.46 0.65

2.40 1.27 0.53

2.55 1.05 0.41

2.25 1.55 0.69

2.40 1.37 0.57

2.55 1.15 0.45

2.25 1.64 0.73

2.40 1.46 0.61

2.55 1.25 0.49

2.70 1.00 0.37

2.25 1.73 0.77

2.40 1.56 0.65

2.55 1.35 0.53

2.70 1.11 0.41

2.25 1.82 0.81

2.40 1.66 0.69

2.55 1.45 0.57

2.70 1.22 0.45

2.85 0.94 0.33

2.25 1.91 0.85

2.40 1.75 0.73

2.55 1.56 0.61

2.70 1.32 0.49

2.85 1.05 0.37

2.25 2.00 0.89

2.40 1.85 0.77

2.55 1.66 0.65

2.70 1.43 0.53

2.85 1.17 0.41

2.25 2.09 0.93

666

685

666

685

717

666

685

717

666

685

717

736

666

685

717

736

666

685

717

736

762

666

685

717

736

762

666

685

717

736

762

666

2.08 1.27 0.61

2.23 1.09 0.49

2.08 1.35 0.65

2.23 1.18 0.53

2.38 0.97 0.41

2.08 1.43 0.69

2.23 1.27 0.57

2.38 1.07 0.45

2.08 1.51 0.73

2.23 1.36 0.61

2.38 1.16 0.49

2.55 0.94 0.37

2.08 1.60 0.77

2.23 1.45 0.65

2.38 1.26 0.53

2.55 1.05 0.41

2.08 1.68 0.81

2.23 1.54 0.69

2.38 1.35 0.57

2.55 1.15 0.45

2.68 0.88 0.33

2.08 1.76 0.85

2.23 1.62 0.73

2.38 1.45 0.61

2.55 1.25 0.49

2.68 0.99 0.37

2.08 1.85 0.89

2.23 1.71 0.77

2.38 1.54 0.65

2.55 1.35 0.53

2.68 1.10 0.41

2.08 1.93 0.93

691

723

691

723

742

691

723

742

691

723

742

768

691

723

742

768

691

723

742

768

794

691

723

742

768

794

691

723

742

768

794

691

31

31

32

32

30

31

31

31

30

30

30

30

29

29

29

29

20

22

24

26

18

20

22

24

26

18

20

22

24

26

18

20

2.58 2.09 0.81

2.73 1.88 0.69

2.88 1.64 0.57

3.03 1.36 0.45

2.45 2.38 0.97

2.58 2.19 0.85

2.73 1.99 0.73

2.88 1.75 0.61

3.03 1.48 0.49

2.45 2.47 1.01

2.58 2.29 0.89

2.73 2.10 0.77

2.88 1.87 0.65

3.03 1.60 0.53

2.45 2.57 1.05

2.58 2.39 0.93

653

678

704

730

627

653

678

704

730

627

653

678

704

730

627

653

2.40 1.94 0.81

2.55 1.76 0.69

2.70 1.54 0.57

2.85 1.28 0.45

2.25 2.18 0.97

2.40 2.04 0.85

2.55 1.86 0.73

2.70 1.65 0.61

2.85 1.40 0.49

2.25 2.27 1.01

2.40 2.14 0.89

2.55 1.96 0.77

2.70 1.76 0.65

2.85 1.51 0.53

2.25 2.36 1.05

2.40 2.23 0.93

685

717

736

762

666

685

717

736

762

666

685

717

736

762

666

685

2.23 1.80 0.81

2.38 1.64 0.69

2.55 1.45 0.57

2.68 1.20 0.45

2.08 2.01 0.97

2.23 1.89 0.85

2.38 1.73 0.73

2.55 1.56 0.61

2.68 1.31 0.49

2.08 2.10 1.01

2.23 1.98 0.89

2.38 1.83 0.77

2.55 1.66 0.65

2.68 1.42 0.53

2.08 2.18 1.05

2.23 2.07 0.93

723

742

768

794

691

723

742

768

794

691

723

742

768

794

691

723

32

32

22

24

2.73 2.21 0.81

2.88 1.98 0.69

678

704

2.55 2.07 0.81

2.70 1.86 0.69

717

736

2.38 1.92 0.81

2.55 1.76 0.69

742

768

32 26 3.03 1.72 0.57

730 2.85 1.62 0.57

762 2.68 1.52 0.57

794




OB379 --1qxp 05.1.17 16:39 Page 22



MSZ-GA35VA -

E1

: MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1


INPUT:1080(W)

INDOOR INDOOR

DB( : ) WB( : )

Q

21

SHC SHF INPUT

25

Q SHC SHF

OUTDOOR DB( : )

INPUT Q

27

SHC SHF INPUT Q

30

SHC SHF INPUT

28

28

28

29

27

27

28

28

26

27

27

27

26

26

26

26

25

25

25

25

24

24

24

24

22

23

23

23

21

21

22

22

18

20

18

20

22

18

20

22

18

20

22

24

18

20

22

24

18

20

22

24

26

18

20

22

24

26

18

20

22

24

26

18

4.11 2.39 0.58

4.29 1.97 0.46

4.11 2.55 0.62

4.29 2.14 0.50

4.46 1.70 0.38

4.11 2.71 0.66

4.29 2.32 0.54

4.46 1.87 0.42

4.11 2.88 0.70

4.29 2.49 0.58

4.46 2.05 0.46

4.69 1.59 0.34

4.11 3.04 0.74

4.29 2.66 0.62

4.46 2.23 0.50

4.69 1.78 0.38

4.11 3.21 0.78

4.29 2.83 0.66

4.46 2.41 0.54

4.69 1.97 0.42

4.83 1.45 0.30

4.11 3.37 0.82

4.29 3.00 0.70

4.46 2.59 0.58

4.69 2.16 0.46

4.83 1.64 0.34

4.11 3.54 0.86

4.29 3.17 0.74

4.46 2.77 0.62

4.69 2.35 0.50

4.83 1.84 0.38

4.11 3.70 0.90

864

907

864

907

940

864

907

940

864

907

940

983

864

907

940

983

864

907

940

983

1037

864

907

940

983

1037

864

907

940

983

1037

864

3.94 2.28 0.58

4.11 1.89 0.46

3.94 2.44 0.62

4.11 2.06 0.50

4.31 1.64 0.38

3.94 2.60 0.66

4.11 2.22 0.54

4.31 1.81 0.42

3.94 2.76 0.70

4.11 2.39 0.58

4.31 1.98 0.46

4.52 1.54 0.34

3.94 2.91 0.74

4.11 2.55 0.62

4.31 2.15 0.50

4.52 1.72 0.38

3.94 3.07 0.78

4.11 2.71 0.66

4.31 2.32 0.54

4.52 1.90 0.42

4.69 1.41 0.30

3.94 3.23 0.82

4.11 2.88 0.70

4.31 2.50 0.58

4.52 2.08 0.46

4.69 1.59 0.34

3.94 3.39 0.86

4.11 3.04 0.74

4.31 2.67 0.62

4.52 2.26 0.50

4.69 1.78 0.38

3.94 3.54 0.90

907

961

907

961

999

907

961

999

907

961

999

1037

907

961

999

1037

907

961

999

1037

1091

907

961

999

1037

1091

907

961

999

1037

1091

907

3.78 2.19 0.58

3.99 1.84 0.46

3.78 2.34 0.62

3.99 2.00 0.50

4.20 1.60 0.38

3.78 2.49 0.66

3.99 2.15 0.54

4.20 1.76 0.42

3.78 2.65 0.70

3.99 2.31 0.58

4.20 1.93 0.46

4.41 1.50 0.34

3.78 2.80 0.74

3.99 2.47 0.62

4.20 2.10 0.50

4.41 1.68 0.38

3.78 2.95 0.78

3.99 2.63 0.66

4.20 2.27 0.54

4.41 1.85 0.42

4.62 1.39 0.30

3.78 3.10 0.82

3.99 2.79 0.70

4.20 2.44 0.58

4.41 2.03 0.46

4.62 1.57 0.34

3.78 3.25 0.86

3.99 2.95 0.74

4.20 2.60 0.62

4.41 2.21 0.50

4.62 1.76 0.38

3.78 3.40 0.90

950

983

950

983

1026

950

983

1026

950

983

1026

1069

950

983

1026

1069

950

983

1026

1069

1123

950

983

1026

1069

1123

950

983

1026

1069

1123

950

3.64 2.11 0.58

3.85 1.77 0.46

3.64 2.26 0.62

3.85 1.93 0.50

4.03 1.53 0.38

3.64 2.40 0.66

3.85 2.08 0.54

4.03 1.69 0.42

3.64 2.55 0.70

3.85 2.23 0.58

4.03 1.85 0.46

4.27 1.45 0.34

3.64 2.69 0.74

3.85 2.39 0.62

4.03 2.01 0.50

4.27 1.62 0.38

3.64 2.84 0.78

3.85 2.54 0.66

4.03 2.17 0.54

4.27 1.79 0.42

4.48 1.34 0.30

3.64 2.98 0.82

3.85 2.70 0.70

4.03 2.33 0.58

4.27 1.96 0.46

4.48 1.52 0.34

3.64 3.13 0.86

3.85 2.85 0.74

4.03 2.50 0.62

4.27 2.14 0.50

4.48 1.70 0.38

3.64 3.28 0.90

994

1026

994

1026

1069

994

1026

1069

994

1026

1069

1123

994

1026

1069

1123

994

1026

1069

1123

1156

994

1026

1069

1123

1156

994

1026

1069

1123

1156

994

31

31

32

32

30

31

31

31

30

30

30

30

29

29

29

29

20

22

24

26

18

20

22

24

26

18

20

22

24

26

18

20

4.29 3.34 0.78

4.46 2.95 0.66

4.69 2.53 0.54

4.83 2.03 0.42

4.11 3.87 0.94

4.29 3.52 0.82

4.46 3.12 0.70

4.69 2.72 0.58

4.83 2.22 0.46

4.11 4.03 0.98

4.29 3.69 0.86

4.46 3.30 0.74

4.69 2.91 0.62

4.83 2.42 0.50

4.11 4.19 1.02

4.29 3.86 0.90

907

940

983

1037

864

907

940

983

1037

864

907

940

983

1037

864

907

4.11 3.21 0.78

4.31 2.84 0.66

4.52 2.44 0.54

4.69 1.97 0.42

3.94 3.70 0.94

4.11 3.37 0.82

4.31 3.01 0.70

4.52 2.62 0.58

4.69 2.16 0.46

3.94 3.86 0.98

4.11 3.54 0.86

4.31 3.19 0.74

4.52 2.80 0.62

4.69 2.35 0.50

3.94 4.02 1.02

4.11 3.70 0.90

961

999

1037

1091

907

961

999

1037

1091

907

961

999

1037

1091

907

961

3.99 3.11 0.78

4.20 2.77 0.66

4.41 2.38 0.54

4.62 1.94 0.42

3.78 3.55 0.94

3.99 3.27 0.82

4.20 2.94 0.70

4.41 2.56 0.58

4.62 2.13 0.46

3.78 3.70 0.98

3.99 3.43 0.86

4.20 3.11 0.74

4.41 2.73 0.62

4.62 2.31 0.50

3.78 3.86 1.02

3.99 3.59 0.90

983

1026

1069

1123

950

983

1026

1069

1123

950

983

1026

1069

1123

950

983

3.85 3.00 0.78

4.03 2.66 0.66

4.27 2.31 0.54

4.48 1.88 0.42

3.64 3.42 0.94

3.85 3.16 0.82

4.03 2.82 0.70

4.27 2.48 0.58

4.48 2.06 0.46

3.64 3.57 0.98

3.85 3.31 0.86

4.03 2.98 0.74

4.27 2.65 0.62

4.48 2.24 0.50

3.64 3.71 1.02

3.85 3.47 0.90

1026

1069

1123

1156

994

1026

1069

1123

1156

994

1026

1069

1123

1156

994

1026

32

32

22

24

4.46 3.48 0.78

4.69 3.10 0.66

940

983

4.31 3.36 0.78

4.52 2.98 0.66

999

1037

4.20 3.28 0.78

4.41 2.91 0.66

1026

1069

4.03 3.14 0.78

4.27 2.82 0.66

1069

1123

32 26 4.83 2.61 0.54

1037 4.69 2.53 0.54

1091 4.62 2.49 0.54

1123 4.48 2.42 0.54

1156




OB379 --1qxp 05.1.17 16:39 Page 23



MSZ-GA35VA -

E1

: MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1


INPUT:1080(W)

INDOOR INDOOR

DB ( : ) WB ( : )

OUTDOOR DB( : )

35 40 46

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

28

28

28

29

27

27

28

28

26

27

27

27

26

26

26

26

25

25

25

25

24

24

24

24

22

23

23

23

21

21

22

22

18

20

18

20

22

18

20

22

18

20

22

24

18

20

22

24

18

20

22

24

26

18

20

22

24

26

18

20

22

24

26

18

3.43 1.99 0.58

3.61 1.66 0.46

3.43 2.13 0.62

3.61 1.80 0.50

3.82 1.45 0.38

3.43 2.26 0.66

3.61 1.95 0.54

3.82 1.60 0.42

3.43 2.40 0.70

3.61 2.09 0.58

3.82 1.75 0.46

4.03 1.37 0.34

3.43 2.54 0.74

3.61 2.24 0.62

3.82 1.91 0.50

4.03 1.53 0.38

3.43 2.68 0.78

3.61 2.38 0.66

3.82 2.06 0.54

4.03 1.69 0.42

4.24 1.27 0.30

3.43 2.81 0.82

3.61 2.52 0.70

3.82 2.21 0.58

4.03 1.85 0.46

4.24 1.44 0.34

3.43 2.95 0.86

3.61 2.67 0.74

3.82 2.37 0.62

4.03 2.01 0.50

4.24 1.61 0.38

3.43 3.09 0.90

1058

1102

1058

1102

1145

1058

1102

1145

1058

1102

1145

1188

1058

1102

1145

1188

1058

1102

1145

1188

1231

1058

1102

1145

1188

1231

1058

1102

1145

1188

1231

1058

3.15 1.83 0.58

3.36 1.55 0.46

3.15 1.95 0.62

3.36 1.68 0.50

3.57 1.36 0.38

3.15 2.08 0.66

3.36 1.81 0.54

3.57 1.50 0.42

3.15 2.21 0.70

3.36 1.95 0.58

3.57 1.64 0.46

3.78 1.29 0.34

3.15 2.33 0.74

3.36 2.08 0.62

3.57 1.79 0.50

3.78 1.44 0.38

3.15 2.46 0.78

3.36 2.22 0.66

3.57 1.93 0.54

3.78 1.59 0.42

3.99 1.20 0.30

3.15 2.58 0.82

3.36 2.35 0.70

3.57 2.07 0.58

3.78 1.74 0.46

3.99 1.36 0.34

3.15 2.71 0.86

3.36 2.49 0.74

3.57 2.21 0.62

3.78 1.89 0.50

3.99 1.52 0.38

3.15 2.84 0.90

1123

1156

1123

1156

1210

1123

1156

1210

1123

1156

1210

1242

1123

1156

1210

1242

1123

1156

1210

1242

1285

1123

1156

1210

1242

1285

1123

1156

1210

1242

1285

1123

2.91 1.68 0.58

3.12 1.43 0.46

2.91 1.80 0.62

3.12 1.56 0.50

3.33 1.26 0.38

2.91 1.92 0.66

3.12 1.68 0.54

3.33 1.40 0.42

2.91 2.03 0.70

3.12 1.81 0.58

3.33 1.53 0.46

3.57 1.21 0.34

2.91 2.15 0.74

3.12 1.93 0.62

3.33 1.66 0.50

3.57 1.36 0.38

2.91 2.27 0.78

3.12 2.06 0.66

3.33 1.80 0.54

3.57 1.50 0.42

3.75 1.12 0.30

2.91 2.38 0.82

3.12 2.18 0.70

3.33 1.93 0.58

3.57 1.64 0.46

3.75 1.27 0.34

2.91 2.50 0.86

3.12 2.31 0.74

3.33 2.06 0.62

3.57 1.79 0.50

3.75 1.42 0.38

2.91 2.61 0.90

1166

1220

1166

1220

1253

1166

1220

1253

1166

1220

1253

1296

1166

1220

1253

1296

1166

1220

1253

1296

1339

1166

1220

1253

1296

1339

1166

1220

1253

1296

1339

1166

31

31

32

32

30

31

31

31

30

30

30

30

29

29

29

29

20

22

24

26

18

20

22

24

26

18

20

22

24

26

18

20

3.61 2.81 0.78

3.82 2.52 0.66

4.03 2.17 0.54

4.24 1.78 0.42

3.43 3.22 0.94

3.61 2.96 0.82

3.82 2.67 0.70

4.03 2.33 0.58

4.24 1.95 0.46

3.43 3.36 0.98

3.61 3.10 0.86

3.82 2.82 0.74

4.03 2.50 0.62

4.24 2.12 0.50

3.43 3.50 1.02

3.61 3.24 0.90

1102

1145

1188

1231

1058

1102

1145

1188

1231

1058

1102

1145

1188

1231

1058

1102

3.36 2.62 0.78

3.57 2.36 0.66

3.78 2.04 0.54

3.99 1.68 0.42

3.15 2.96 0.94

3.36 2.76 0.82

3.57 2.50 0.70

3.78 2.19 0.58

3.99 1.84 0.46

3.15 3.09 0.98

3.36 2.89 0.86

3.57 2.64 0.74

3.78 2.34 0.62

3.99 2.00 0.50

3.15 3.21 1.02

3.36 3.02 0.90

1156

1210

1242

1285

1123

1156

1210

1242

1285

1123

1156

1210

1242

1285

1123

1156

3.12 2.43 0.78

3.33 2.19 0.66

3.57 1.93 0.54

3.75 1.57 0.42

2.91 2.73 0.94

3.12 2.55 0.82

3.33 2.33 0.70

3.57 2.07 0.58

3.75 1.72 0.46

2.91 2.85 0.98

3.12 2.68 0.86

3.33 2.46 0.74

3.57 2.21 0.62

3.75 1.87 0.50

2.91 2.96 1.02

3.12 2.80 0.90

1220

1253

1296

1339

1166

1220

1253

1296

1339

1166

1220

1253

1296

1339

1166

1220

32

32

22

24

3.82 2.98 0.78

4.03 2.66 0.66

1145

1188

3.57 2.78 0.78

3.78 2.49 0.66

1210

1242

3.33 2.59 0.78

3.57 2.36 0.66

1253

1296

32 26 4.24 2.29 0.54

1231 3.99 2.15 0.54

1285 3.75 2.02 0.54

1339




OB379 --1qxp 05.1.17 16:39 Page 24


PERFORMANCE DATA HEAT operation

MSZ-GA25VA -

E1

: MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1 Rated frequency 85Hz

CAPACITY:3.2(kW) INPUT:760(W)

INDOOR

DB( :

15

21

26

)

OUTDOOR WB( : )

-10 -5 0 5 10 15 20

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

2.02

494 2.43

593 2.85

669 3.26

722 3.68

768 4.06

790 4.48

806

1.92

532 2.30

631 2.72

699 3.10

752 3.52

790 3.90

813 4.30

844

1.73

570 2.14

669 2.53

737 2.94

790 3.36

828 3.74

851 4.16

874

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

MSZ-GA35VA -

E1

: MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1 Rated frequency 96Hz

CAPACITY:4.0(kW) INPUT:1055(W)

INDOOR

DB( :

15

21

26

)

-10 -5 0

OUTDOOR WB( : )

5 10 15 20

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

2.52

686 3.04

823 3.56

928 4.08

1002 4.60

1066 5.08

1097 5.60

1118

2.40

739 2.88

876 3.40

971 3.88

1044 4.40

1097 4.88

1129 5.38

1171

2.16

791 2.68

928 3.16

1023 3.68

1097 4.20

1150 4.68

1182 5.20

1213

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


OB379 --1qxp 05.1.17 16:39 Page 25


9 ACTUATOR CONTROL

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

9-1. Outdoor fan motor control

The fan motor turns ON/OFF, interlocking with the compressor.

[ON] The fan motor turns ON 5 seconds before the compressor starts up.

[OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

5 seconds 15 seconds

ON

Compressor

OFF

ON

Outdoor fan motor

OFF

9-2. R.V. coil control

Heating . . . . . . . . . . . . . . . . ON

Cooling. . . . . . . . . . . . . . . . . OFF

Dry . . . . . . . . . . . . . . . . . . . . OFF

NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.

<COOL> <HEAT>

5 seconds 5 seconds

Compressor

ON

OFF

R.V.coil

ON

OFF

ON or OFF

Outdoor fan

ON motor

OFF

ON or OFF

9-3. Relation between main sensor and actuator

Sensor

Discharge temperature thermistor

Indoor coil temperature thermistor

Defrost thermistor

Fin temperature thermistor


Purpose

Protection

Cooling : Coil frost prevention

Compressor LEV w

1

Actuator

Outdoor fan motor

R.V. coil

Heating : High pressure protection

Cooling : High pressure protection

Heating : Defrosting w

1 w

1 w

1

Protection w

1

Cooling : Low ambient temperature operation w

1

Heating : Defrosting (Heater)

Indoor fan motor

Defrost heater w

1 MUZ-GA35VA

MUZ-GA35VAH w

2 MUZ-GA25VA

MUZ-GA25VAH

Solenoid valve w

2


OB379 --1qxp 05.1.17 16:39 Page 26


10 SERVICE FUNCTIONS

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

CHANGE IN DEFROST SETTING

<JS> When the JS wire of the outdoor Inverter P.C. board is cut/ soldered, the defrost finish temperature is changed.

(Refer to 11-7-1.)

Jumper wire

JS soldered

(Initial setting) none

(cut)

MUZ-GA25VA -

E1

Defrost finish temperature

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

5 : 8 : 5 : 8 :

8 : 15 : 8 : 15 :

11 TROUBLESHOOTING

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

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 turn off the main unit first with the remote controller, 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 electrical parts, be careful to the residual voltage of smoothing capacitor.

4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.

5) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

Lead wiring Housing point

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) Before servicing check that the connector and terminal are connected properly.

3) 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.

4) When troubleshooting, refer to 11-2., 11-3. and 11-4.


OB379 --1qxp 05.1.17 16:39 Page 27


11-2. Failure mode recall function

Outline of the function

This air conditioner can memorize the abnormal condition which has occurred once.

Even though LED indication listed on the troubleshooting check table (11-4.) disappears, the memorized failure details can be recalled.

This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.

1. Flow chart of the indoor/outdoor unit failure mode recall function

Operational procedure

The cause of abnormality cannot be found because the abnormality doesn't recur.

Setting up the failure mode recall function

Turn ON the power supply.

1 While pressing both OPERATION SELECT button and TOO COOL

button on the remote controller at the same time, press RESET button.

2 First, release RESET button.

And release the other two buttons since all LCD in operation display

section of the remote controller is displayed after 3 seconds.

1 While pressing both OPERATION SELECT

button and TOO COOL button on the remote controller at the same time,

press RESET button.


And release the other two buttons since all LCD

in operation display section of the remote controller

is displayed after 3 seconds.

W 1

Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed).

With the remote controller headed towards the indoor unit, press TOO COOL or TOO

WARM button to adjust the set temperature to 24 : .

Does the left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds?

Blinks: Either indoor or outdoor unit is abnormal.

Beep sounds are emitted at the same

timing of the blinking of the left lamp of

OPERATION INDICATOR lamp. W 2

Judgment of indoor/outdoor abnormality

Yes

(Blinks)

Before blinking, does the left lamp of

OPERATION INDICATOR lamp stay ON for 3 seconds?

Stays ON for 3 seconds (without beep):

The outdoor unit is abnormal.

No

No

(OFF)

Yes

W

1. Regardless of normal or abnormal, a short

beep is emitted once as the signal is received.

Indoor unit is normal.

There is a possibility that the outdoor unit is abnormal.

Confirm the presence of abnormality according to the flow chart of the detailed outdoor unit failure mode recall function.

The indoor unit is abnormal.

Check the blinking pattern, and refer to confirm the abnormal point.

Make sure to check at least two consecutive blinking cycles. W 2


Check the blinking pattern, and refer to confirm the abnormal point (11-2.3.).


Releasing the failure mode recall function

Release the failure mode recall function by the following procedures.

1

With the remote controller headed towards the indoor unit, press any button

that is not used in this failure mode recall function (e.g. TIMER button) .

OR

1

Turn OFF the power supply and turn ON it again.

2

Press RESET button of the remote controller.

•As for indoor unit, refer to service manual OB378.

Repair the defective parts.

Deleting the abnormal condition

1

After repairing the unit, recall the failure mode again according to

"Setting up the failure mode recall function" mentioned above.

2

Press EMERGENCY OPERATION switch so that the memorized

abnormal condition is deleted.

3

Release the failure mode recall function according to "Releasing the

failure mode recall function" mentioned above.

Note1.Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.

2.If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

W 2. Blinking pattern when the indoor unit is abnormal:

2.5-second OFF

Blinking at 0.5second interval 2.5-second OFF

Blinking at 0.5second interval

ON

OFF

Beeps

Repeated cycle

Beeps

Repeated cycle

Beeps

Repeated cycle

W 3.Blinking pattern when the outdoor unit is abnormal:

Blinking at 0.5-

2.5-second OFF 3-second ON second interval

ON

OFF

No beep

Repeated cycle

Beeps

2.5-second OFF 3-second ON

No beep

Repeated cycle


Beeps


Repeated cycle

OB379 --1qxp 05.1.17 16:39 Page 28


2. Flow chart of the detailed outdoor unit failure mode recall function

Operational procedure

There is a possibility that the outdoor unit is abnormal.

Confirm the presence of abnormality according to the following procedures.

Confirm that the remote controller is in the failure mode recall function.

W 1

With the remote controller headed towards the indoor unit, press TOO COOL or TOO

WARM button to adjust the set temperature to 25 : .

Confirmation of abnormality presence

Does the left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds? W 2

Blinks: The outdoor unit is abnormal.

Beep sounds are emitted at the same timing of the blinking of the left lamp of OPERATION INDICATOR

lamp.

Yes

(Blinks)


Check the blinking pattern, and refer to confirm the abnormal point(11-2.3.).


No

(OFF)

W 1. Regardless of normal or abnormal, 2 short

beeps are emitted as the signal is received.

The outdoor unit is normal.

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures.

1

With the remote controller headed towards the indoor unit, press any button

that is not used in this failure mode recall function (e.g. TIMER button) .

OR

1 Turn OFF the power supply and turn ON it again.

2 Press RESET button of the remote controller.

Release the failure mode recall function according to the left mentioned procedure.

Repair the defective parts.

Deleting the abnormal condition

1 After repairing the unit, recall the failure mode again according to

"Setting up the failure mode recall function" mentioned above.

2

Press EMERGENCY OPERATION switch so that the memorized

abnormal condition is deleted.

3

Release the failure mode recall function according to "Releasing the

failure mode recall function" mentioned above.

Note1. Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.

2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

W 2.Blinking pattern when outdoor unit is abnormal:

2.5-second OFF 3-second ON

Blinking at 0.5second interval 2.5-second OFF 3-second ON


ON

OFF

No beep

Repeated cycle

Beeps No beep

Repeated cycle

Beeps

Repeated cycle


OB379 --1qxp 05.1.17 16:39 Page 29


3. Outdoor unit failure mode table

Abnormal point (Failure mode)


OB379 --1qxp 05.1.17 16:39 Page 30


11-3. Instruction of troubleshooting

Start

Indoor unit operates.

Outdoor unit doesn't operate.

Indoor unit operates.

Outdoor unit doesn't operate normally.

Indoor unit doesn't receive the signal from remote controller.

OPERATION INDICATOR lamp on the indoor unit is flashing on and off.

Outdoor unit operates in only Test Run operation. w

Outdoor unit doesn't operate even in

Test Run operation. w

Unit doesn't operate normal operation in

COOL or

HEAT mode.

Indoor unit operates, when

EMERGENCY

OPERATION switch is pressed.

Indoor unit doesn't operate, when

EMERGENCY

OPERATION switch is pressed.

Check room temperature thermistor.

Refer to

"Test point diagram and voltage".

Refer to 11-6.

A

"How to check inverter/ compressor".

Refer to 11-6.

H

"Check of

R.V. coil".

Refer to

"Check of remote controller and receiver

P.C. board".

1. Check indoor / outdoor

connecting wire.

(Check if the power

is supplied to the

indoor unit.)

2. Refer to

"Check of indoor

electronic control

P.C. board and indoor

fan motor".

If blinking of OPERATION

INDICATOR lamp cannot be checked, it can be checked with failure mode recall function.

w As for "Test run opearation",

refer to indoor unit service

manual OB378.

As for indoor unit, refer to service manual OB378.

All lamps

Flash on and off at 0.5-second intervals

Cause:

Indoor unit

• The horizontal

vane is not

installed

correctly.

Left lamp

Flash on and off at

0.5-second intervals

Cause:

Indoor/

Outdoor unit

• Mis-wiring or

trouble of

serial signal.

Left lamp

2-time flash

Cause:

Indoor unit

• Trouble of

room temp-

erature/

indoor coil

thermistor

Left lamp

3-time flash

Cause:

Indoor unit

• Trouble of

indoor fan

motor

Left lamp

4-time flash

Cause:

Indoor unit

• Trouble of

indoor unit

control

system

Left lamp

5-time flash

Cause:

Outdoor unit

• Outdoor

power

system

abnormality

Left lamp

6-time flash

Cause:

Outdoor unit

• Trouble of

thermistor

in outdoor

unit

Left lamp

7-time flash

Cause:

Outdoor unit

• Trouble of

outdoor

control

system

Left lamp

14-time flash

Cause:

Outdoor unit

• Other

abnormality

Refer to

"Check of installation of the horizontal vane".

Refer to 11-6.

o

"How to check

of mis-wiring and serial signal error

(when outdoor unit doesn't work)".

Check room temperature thermistor and indoor coil thermistor.

Refer to

"Test point diagram and voltage".

Refer to

"Check of indoor fan motor".

Replace the indoor electronic control

P.C. board.

Refer to 11-6.

A

"How to check inverter/ compressor".

Refer to 11-6.

G

"Check of outdoor thermistors".

Replace inverter P.C. board.

Check 11-2.2.

"Flow chart of the detailed outdoor unit failure mode recall function."


OB379 --2qxp 05.1.17 16:38 Page 31


11-4. Troubleshooting check table

NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.

2. LED lights up during normal operation.

Inverter P.C. board (Parts side)

LED

Flashing

No.

1

2

3

4

5

6

7

Symptom

Outdoor unit does not operate

LED indication Abnormal point/ Condition

1-time flash every

2.5 seconds

Outdoor power system

Detection method

When it consecutively occurs 3times that the compressor stops for overcurrent protection or start-up failure protection within

1minute start-up.

Check point

· Check stop valve.

· Reconnect connector of compressor.

· Refer to 11-6.

A "How to check inverter/ compressor".

· Refer to 11-6.

C "Check of intelligent power module".

· Refer to 11-6.

G "Check of outdoor thermistors".

'Outdoor unit stops and restarts 3 minutes later' is repeated

NOTE:

For abnormality location, refer to

'Indoor troubleshooting check table'.

Refer to service manual OB371.

Outdoor thermistors

Outdoor control system

When discharge temperature thermistor, fin temperature thermistor, defrost thermistor, P.C. board temperature thermistor or ambient temperature thermistor shorts or opens during compressor running, compressor stops.

When nonvolatile memory data cannot be read properly, compressor stops.

6-time flash

2.5 seconds OFF serial signal

(When the left lamp of OPERATION INDICATOR lamp of indoor unit lights up or flashes 7-time.)

When the communication failure between the indoor and outdoor unit for 3 minutes.

14-time flash

2.5 seconds OFF

Outdoor unit

(Other abnormality)

When outdoor unit is failure.

2-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

Overcurrent protection

Discharge temperature overheat protection

When 14A(MUZ-GA25VA, MUZ-GA25VAH)/ 24A(MUZ-

GA35VA, MUZ-GA35VAH) current flows into intelligent power module, compressor stops and restarts 3 minutes later.

When discharge temperature thermistor exceeds 116 compressor stops. Compressor can restart if discharge temperature thermistor reads 100 :

: ,

or less 3 minutes later.

Replace inverter P.C. board.

Refer to 11-6.

O "How to check miswiring and serial signal error.

Refer to 11-2.2. Flow chart of the detailed outdoor unit failure mode recall function.



· Refer to 11-6.

A "How to check

inverter/compressor".

· Refer to 11-6.

C

"Check of

intelligent power module".

· Check refrigerant circuit and refrigerant amount.

· Refer to 11-6.

L "Check of LEV".

8

9

10

11

12

13

14

15

16

17

18

19

4-time flash

2.5 seconds OFF

Fin temperature

/P.C. board temperature thermistor overheat protection

High pressure protection

When temperature of fin temperature thermistor on the heat sink exceeds 82 : (MUZ-GA25VA, MUZ-GA25VAH)/

83 : (MUZ-GA35VA, MUZ-GA35VAH) or temperature of P.C. board temperature thermistor exceeds 81 : (MUZ-GA25VA,

MUZ-GA25VAH)/ 85 : (MUZ-GA35VA, MUZ-GA35VAH), compressor stops and restarts 3 minutes later.

When indoor coil thermistor exceeds 70 : in HEAT mode.

When the defrost thermistor exceeds 70 : in COOL mode.

· Check around outdoor unit.

· Check outdoor unit air passage.

· Refer to 11-6.

fan motor".

I "Check of outdoor

5-time flash

2.5 seconds OFF



8-time flash

2.5 seconds OFF

10-time flash

2.5 seconds OFF

Compressor synchronous abnormality

Outdoor fan

When the waveform of compressor current is distorted.

When outdoor fan has stopped within 30 seconds 3-times a row after outdoor fan start-up, unit stops.


· Refer to 11-6.

A

"How to check

inverter/compressor".

· Refer to 11-6.

C "Check of

intelligent power module".

· Refer to 11-6.

I "Check of outdoor fan motor.

· Refer to 11-6.

N "Check of inverter

P.C. board.

· Refer to 11-6.

A "How to check inverter/compresssor".

12-time flash

2.5 seconds OFF

Compressor each phase current

9-time flash

2.5 seconds OFF

Inverter check mode

When compressor each phase current cannot be detected normally

When DC voltage of inverter cannot be detected normally.

Outdoor unit operates

1-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

Frequency drop by current protection

When current from power outlet exceeds 5.2A(MUZ-GA25VA,

MUZ-GA25VAH)/ 6.1A(MUZ-GA35VA, MUZ-GA35VAH), compressor frequency lowers.

Frequency drop by high pressure protection

Frequency drop by defrosting in COOL mode

Frequency drop by discharge temperature protection

When indoor coil thermistor exceeds 55 : in HEAT mode, compressor frequency lowers.

When indoor coil thermistor reads 8 : or less in COOL mode, compressor frequency lowers.

When discharge temperature thermistor exceeds 111 compressor frequency lowers.

: ,

Outdoor unit operates

13-time flash

2.5 seconds OFF

7-time flash

2.5 seconds OFF

8-time flash

2.5 seconds OFF

DC voltage

Low discharge temperature protection

PAM protection

PAM:

Pulse

Amplitude

Modulation

· Check for short time power failure by such as lightning strike.

· Refer to 11-6.

A "How to check inverter/compresssor".

The unit is normal, but check the following.

· Check if indoor filters are clogged.

· Check if refrigerant is short.

· Check if indoor/outdoor unit air circulation is short cycled.

When discharge temperature has been 50 minutes.

When the connector of compressor is disconnected, inverter check mode starts.

: or less for 20

When the overcurrent flows into IGBT(Insulated Gate Bipolar transistor : TR821) or when the bus-bar voltage reaches 320V or more, PAM stops and restarts.


· Refer to 11-6.

L "Check of

LEV".

· Refer to 11-6.

G "Check of outdoor thermistors".

· Refer to 11-6.

L "Check of LEV".


This is not malfunction.

PAM protection will be activated in the following cases;

1 Instantaneous power voltage drop

(Short time power failure)

2 When the power supply voltage is

high.

Check if the connector of the compressor is correctly connected.

Refer to 11-6.

A "How to check inverter/ compressor".

The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.

(Example) When the flashing frequency is “2”.

0.5-second ON 0.5-second ON

ON

OFF

2.5-second OFF 2.5-second OFF


OB379 --2qxp 05.1.17 16:38 Page 32


11-5. Trouble criterion of main parts

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

Check method and criterion Part name

Defrost thermistor

(RT61)

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

5 k

Normal

" ~ 55 k "

Abnormal

Open or short-circuit

Ambient temperature thermistor(RT65)

Discharge temperature thermistor(RT62)

Fin temperature thermistor(RT64)

Measure the resistance with a tester.

Before measurement, hold the thermistor with your hands to warm it up.

(Part temperature 0˚C ~ 40˚C)

Normal

150 k " ~ 600 k "

Abnormal



Before measurement, hold the thermistor with your hands to warm it up.

(Part temperature 0˚C ~ 40˚C)

Normal

30 k " ~ 180 k "

Abnormal


Compressor(MC)

Outdoor fan motor(MF)

INNER FUSE

(Only MUZ-GA25VA/H)

152 i 0

5

: CUT OFF

R.V. coil(21S4)

Measure the resistance between the terminals with a tester.

(Part temperature –20˚C ~ 40˚C)

MUZ-GA25VA

Normal

MUZ-GA25VAH

MUZ-GA35VA

MUZ-GA35VAH

Abnormal

U-V

U-W

V-W

1.58 " ~ 2.03

" 1.28 " ~ 1.66 "




Color of the lead wire

WHT – BLK

BLK – RED

RED – WHT

Normal

MUZ-GA25VA

MUZ-GA25VAH

292 " ~ 374 "

236 " ~ 304 "

MUZ-GA35VA

MUZ-GA35VAH

31 " ~ 41 "

31 " ~ 41 "

31 " ~ 41 "

Abnormal




Normal Abnormal

MUZ-GA25VA

MUZ-GA25VAH

MUZ-GA35VA

MUZ-GA35VAH Open or short-circuit

1.26 k " ~ 1.62 k " 1.20 k " ~ 1.55 k "

WHT

2

V

BLK RED WHT

Figure

V

RED BLK

3

W

1

U

MUZ-GA25VA MUZ-GA35VA

MUZ-GA25VAH MUZ-GA35VAH

WHT

2

RED BLK

3 1

W

FUSE

U

Expansion valve coil(LEV)

MUZ-GA35VA

MUZ-GA35VAH


(Part temperature : –20˚C ~ 40˚C)

Normal Color of the lead wire

WHT – RED

RED – ORN

YLW – BRN

BRN – BLU

38 " ~ 50 "

Defrost heater(H)

Solenoid valve coil

(21R1)

MUZ-GA25VA

MUZ-GA25VAH


(Part temperature -20˚C ~ 40˚C)

Normal

333 " ~ 428 "

Abnormal



(Part temperature -20˚C ~ 40˚C)

Normal

1,220 " ~ 1,580 "

Abnormal


Abnormal


WHT

6

RED

1

ORN

4

LEV


OB379 --2qxp 05.1.17 16:38 Page 33


11-6. Troubleshooting flow

When OPERATION INDICATOR lamp flashes 5-time.

Outdoor unit does not operate.

A How to check inverter/ compressor

Disconnect the connector (CN61) between compressor and the intelligent power module (IPM).

Check the voltage between terminals.

See 11-6.

B “Check of open phase” .

Are the voltages balanced?

Yes

Check the compressor.

No

Check the resistance of the intelligent power module.

See 11-6.

D “Check of compressor” .

B Check of open phase

● With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if the inverter is normal by measuring the balance of voltage between the terminals.

Output voltage [V]

115V

<< Operation method>>

Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit. (test-run mode : refer to page 18)

<<Measurement point>> at 3 points

BLK (U)-WHT (V)

BLK (U)-RED (W)

WHT(V)-RED (W) w

Measure AC voltage between

the lead wires at 3 points.

NOTE 1. Output voltage varies according to power supply voltage.

2. Measure the voltage by analog type tester.

3. During this check, LED of inverter P.C. board flashes 9 times.

See 11-6.

C 'Check of intelligent power module'.

Yes

Is the resistance infinite?

No

(0~several " )

Replace the inverter P.C.

board.

Replace the inverter P.C.

board and compressor.

Inverter P.C. board

(Parts side)

LED

9-time flash

2.5-second OFF

Flashing

C Check of intelligent power module

● Disconnect the connector (CN61) between the compressor and the intelligent power module, and measure the resistance between the terminals on the intelligent power module.

<<Measurement point>>

at 6 points

BLK-WHT, WHT-BLK

BLK-RED, RED-BLK

WHT-RED, RED-WHT

<<Judgement>>

Infinite [ " ]···········Normal

0~dozens of ······Abnormal (short) ohmmeter indication

"

X1

Normal

(infinite)

"

X1

Abnormal

(0~dozens of " )


OB379 --2qxp 05.1.17 16:38 Page 34


D Check of compressor

Start

11-6.

E "Check of compressor winding".

Is the compressor normal?

Yes

No

11-6.

F "Check of compressor operation time".

Does the compressor operate continuously?

Yes

No

Ok

Replace the compressor.

Is the compressor operation time more than

10 seconds?

Yes

Check the refrigerant circuit.

No

Replace the compressor.

E Check of compressor winding

● Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance between the compressor terminals.

<<Measurement point>> at 3 points

BLK-WHT

BLK-RED

WHT-RED

<<Judgement>> w

Measure the resistance between the

lead wires at 3 points.

Refer to 11-5..

0[ " ] ···············Abnormal [short]

Infinite[ " ] ·······Abnormal [open]

NOTE 1. Be sure to zero the ohmmeter before measurement.

2. Winding resistance for each phase at 20 : .

Refer to 3.SPECIFICATION.

Ohmmeter indication

"

X1

"

X1

Normal

(1~several " )

V

U

Compressor motor

Abnormal

(0 " ····· short)

WHT

2

RED BLK

3

W

1

"

X1

Abnormal

(infinite····· open)

F Check of compressor operation time

● Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to over current.

<<Operation method>>

Start heating or cooling operation by pressing EMERGENCY

OPERATION switch on the indoor unit. (Test-run mode)

<<Measurement>>

Measure the time from the start of outdoor fan running to the stop of compressor due to over current.

<<Judgement>>

For reference

0~10 seconds·····················Abnormal (compressor short or poor contact)

10~60 seconds···················Abnormal (compressor lock-out)

60 seconds~5 minutes·······Abnormal (refrigerant circuit defect) more than 5 minutes···········Normal

0 second

10 seconds

60 seconds

5 minutes

Outdoor fan starts

Abnormal

(Compressor winding short or layer short)

(Compressor connector poor contact)

Abnormal

(Compressor lock-out)

Abnormal

(Refrigerant circuit defect, etc.)

Normal


OB379 --2qxp 05.1.17 16:38 Page 35


When OPERATION INDICATOR lamp flashes 6-time.

The thermistors in the outdoor unit are abnormal.

G Check of outdoor thermistors

Disconnect the connectors CN641, CN642 and CN643 from the inverter P.C. board.

(Check the characteristics of each thermistor.) Defrost thermistor RT61

Measure the resistance between CN641

1 and 2 .

Discharge temperature thermistor RT62


3 and 4 .

1 Reconnect the connectors CN641,

CN642 and CN643.

2 Disconnect the connector (CN61) between the compressor and intelligent power module.

Replace the inverter

P.C. board.

Fin temperature thermistor RT64


1 and 2 .

Ambient temperature thermistor RT65


1 and 2 .

Does the resistance of the thermistor have the characteristics (11-

7.1.)?

No

Yes

Replace the thermistor except RT64.

In case of RT64, replace the inverter P.C. board.

Since RT64 is combined with the inverter P.C. board.

Turn ON the power supply and press

EMERGENCY

OPERATION switch.

No

Does the unit operate

10 minutes or more except RT65?

Yes

Reconnect the

connector or the connecting wire.

H Check of R.V. coil w

First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-5..

w

In case CN721 is not connected or R.V. coil is open, voltage is generated between the

terminal pins of the connector although any signal is not being transmitted to R.V. coil.

Check if CN721 is connected.

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

Disconnect connector (CN61) between the compressor and intelligent power module.


EMERGENCY OPERATION switch twice (HEAT mode).

Is there 230V AC between CN721 1 and

2 on the power P.C.board 3 minutes after the power supply is turned ON?

Yes

Replace the 4-way valve.

No Replace the power P.C. board.

CN721

Power P.C. board

(Soldered side)

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

Disconnect connector (CN61) between the compressor and the intelligent power module.


EMERGENCY OPERATION switch once

(COOL mode).

Is there 230V AC between CN721 1 and

2 on the power P.C. board 3 minutes after the power supply is turned ON?

No

•Defective R.V. coil

•Defective 4-way valve

Yes Replace the power P.C. board.


OB379 --2qxp 05.1.17 16:38 Page 36


Outdoor fan motor does not operate.

I Check of outdoor fan motor

MUZ-GA25VA

-

MUZ-GA25VAH

-

E1

E1

Check the resistance of fan motor. (Refer to 11-5.)

Is the resistance of fan motor normal?

Yes

No

Disconnect the connector CN771 on the power P.C. board.

Disconnect the connector (CN61) between compressor and power transistor module.

Turn ON the power supply and press the

EMERGENCY OPERATION switch.

Does the left lamp of

OPERATION INDICATOR lamp on the indoor unit light up?

No

Replace the outdoor fan motor.

Rectify indoor/ outdoor connecting wire.

Yes

Is there voltage 230V

AC between indoor terminal block S1 and

S2?

Yes

Fan motor

Indoor/ outdoor connecting wire

Outdoor terminal block

S3

S2

S1

1 2 3

CN771

Power P.C. board

3 minutes after, is there voltage 230V AC between CN771 2 and

3 on the power P.C. board?

Yes


No

No


P.C. board.

Replace the power P.C. board.


OB379 --2qxp 05.1.17 16:38 Page 37


Outdoor fan motor does not operate.

I Check of outdoor fan motor

MUZ-GA35VA

-

E1

MUZ-GA35VAH

-

E1

Is the resistance between each terminal of outdoor fan motor

No

Yes

Disconnect CN932 from the inverter

P.C. board.

Inverter P.C. board

(Solder side)

CN931

CN932



Rotate the outdoor fan slowly by hand, and measure the voltage of CN931 (Measurement of feedback output).

Between 1 (+) and 5 (-)



No

( Fixed to either 5V or 0V DC)

Does the voltage between each terminal become 5V and 0V DC repeatedly?

No

Yes

Does the outdoor fan rotate smoothly?

Ok

Yes

Inverter does not operate.

J Check of power supply

Disconnect the connector

(CN61) between compressor and intelligent power module.

Turn ON power supply and press

EMERGENCY OPERATION switch.

Does the left lamp of

OPERATION INDICATOR lamp on the indoor unit light up?

Yes

Is there voltage

280V ~ 370V DC between DB61 (+) and

DB61 (–) on the inverter P.C. board?

Refer to 11-7.1.

No

Check the electric parts in main circuit.

Yes

No

Indoor/ outdoor connecting wire

Outdoor terminal block

S3

S2

S1

Rectify indoor/ outdoor connecting wire.

Yes

Is there voltage 230V AC between the indoor terminal block S1 and

S2?

No


P.C. board.

Dose LED on the inverter

P.C. board light up or flash? Refer to 11-7.1.

Yes

No

Ok.

If flash, refer to

11-4.

DB61


P.C. board.

280V~370V DC

Inverter P.C. board

(Solder side)


OB379 --2qxp 05.1.17 16:38 Page 38


Outdoor unit does not operate at all, or stops immediately due to overcurrent.

K Check of current-limiting resistor

When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly.

Does the current-limiting resistor

(R64A or R64B) on the power P.C.

board short out? (Normal resistance : 5 ' )

No


EMERGENCY

OPERATION switch of the indoor unit.

Does LED on the inverter

P.C. board light up?

No Replace the power P.C.

board or the inverter P.C.

board.

Yes


Does the rush current limiting relay(X64) work properly? (Normally it close 1 minutes after outdoor unit power ON.)

No

Replace the power P.C.board.

● Check other electric parts in the main circuit together in the case of the defective current-limiting resistor.

Yes

Replace the power P.C.

board or the compressor.

Heating/Cooling does not work sufficiently.

L Check of LEV (Expansion valve)


1

While pressing both OPERATION SELECT


press RESET button.





With remote controller set toward the indoor unit, press

OPERATE/ STOP(ON/ OFF) button and confirm one beep tone.

1 While pressing both OPERATION SELECT


press RESET button.





LEV operates in full-opening direction.

Do you hear the expansion valve "click, click·······"?

Do you feel the expansion valve vibrate on touching it ?

No

Is LEV properly fixed to the expansion valve?

Yes

Yes

No

Does the resistance of LEV have the characteristics?

Refer to 11-5.

No

Replace the LEV.

Ok

Yes

Properly fix the LEV to the expansion valve.

NOTE : After check of LEV, do the undermentioned

operations.

1. Turn OFF the power supply and

turn ON it again.

2. Press RESET button on the remote

controller.

Measure each voltage between connector pins of CN724 on the inverter P.C. board.

1.Pin

3 (-) Pin 1 (+)

2.Pin

4 (-) Pin 1 (+)

3.Pin

5 (-) Pin 1 (+)

4.Pin

6 (-) Pin 1 (+)

Is there about 3~5V AC between each?

NOTE: Measure the voltage by an analog tester.

Yes

Replace the expansion valve.

No

Replace the inverter P.C. board.


OB379 --2qxp 05.1.17 16:38 Page 39


Outdoor base gets frozen.

M Check of defrost heater <MUZ-GA25VAH MUZ-GA35VAH>

Check the following points before checking electric continuity.

1) Does the resistance of ambient temperature thermistor have the characteristics? Refer to 11-7.1.

2) Is the resistance of defrost heater normal? Refer to 11-5.

3) Does the heater protector remain conducted (not open)?

4) Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors?

In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5 : or less, and let the defrost thermistor continue to read -1 : or less.

NOTE: In case both thermistors are more than the above

temperature, cool them with cold water etc...

Yes

Is there 230V AC between CN722 1 and 3 on the power P.C. board? Refer to 11-7.2.

No problem of the power P.C. board.

No

Yes

Is the voltage between CN726 2 (+)3 (-) on the power P.C. board 0V DC? Refer to 11-7.2.

No

Replace the power

P.C. board.


2 3

CN726

3

2

1

CN722

26H

H

230V AC

Outdoor fan motor does not operate, or stops immediately after starting up.

N Check of inverter P.C. board

Check the outdoor fan motor.

Refer to11-6.

I .

Check the connection of the connectors.

CN932 : driving output

CN931 : feedback signal

Inverter P.C.board

(Solder side)

CN931

CN932

Make the outdoor unit operate by starting EMERGENCY OPERATION .

Check the LED indication on the inverter P.C. board.

Does LED indicate 10-time flash?

No Check the corresponding section by

LED indication.

Yes

(10-time flash)

Outdoor fan motor protection



OB379 --2qxp 05.1.17 16:38 Page 40


When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.

Outdoor unit doesn’t operate.

O How to check mis-wiring and serial signal error (when outdoor unit does not work)

Inverter P.C.board

(Parts side)

LED

Blinking

A

· Turn OFF inverter-controlled lighting equipment.

· Turn OFF the power supply and then turn ON it again.

· Press EMERGENCY OPERATION switch.

Is serial signal error indicated

6 minutes later?

B

Yes

No

· Reinstall either the unit or the light each other away.

· Attach a filter on receiving section of the indoor unit.

Turn OFF the power supply.

Is there rated voltage of

230V AC in the power supply?

Yes


No

Is there 230V AC between outdoor terminal block S1 and

S2?

No

Yes

Press EMERGENCY OPERATION switch.

Check the power supply.

Check the wiring.

Does the left lamp of OPERATION

INDICATOR lamp light up?

<Confirmation of the power to the indoor unit>

Yes

Is the self-check of the indoor unit displayed 6 minutes after?

Serial signal error display

The left lamp of

OPERATION

INDICATOR lamp blinks quickly.

Yes

A

No

No

Is there any miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire?

No

Yes

Make them sure.

B

Turn OFF the power supply.

Check once more if the indoor/outdoor connecting wire is not mis-wiring.

Short-circuit outdoor terminal block S2 and

S3.

W

1

W

1. Mis-wiring may damage indoor electronic control

P.C. board during the operation.

Be sure to confirm the wiring is correct before the

operation starts.

Turn ON the power supply of the outdoor unit.

In 3 minutes after turning ON the power supply of the outdoor unit, does the LED on the inverter P.C. board repeat quick blinking "3.6-second-OFF and 0.8-second-ON"?

Be sure to check above in 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. When the inverter P.C.

board is normal, LED also blinks 6 times after 3 minutes.

No

(Lighting)


P.C. board.

W

2

W

2 Be careful to the residual

voltage of smoothing capacitor.

Yes

Remove the short-circuit between outdoor terminal block S2 and S3.

Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal>

Be sure to release the failure-mode recall function after checking.

No

Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block?

No

Yes

Is there 230V AC between outdoor terminal block S1 and S2?

<Confirmation of power voltage>

No

Yes

Replace the indoor electronic control P.C. board.

Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block?

As for indoor unit, refer to service manual OB378.


Yes

Replace the indoor/outdoor connecting.

Yes Replace the indoor/outdoor connecting.

OB379 --2qxp 05.1.17 16:38 Page 41


When the cool air does not blow out from the indoor unit in Low Outside Temperature Operation, or the condensed water drops from the indoor unit.

P Operation check of the solenoid valve.

Enter the failure mode recall function.

Correct the connection.

No

Do you hear the operation sound

(click sound) of the solenoid valve every 5 seconds?

No

Is CN923 on the outdoor power P.C. board firmly connected without disconnection or loose connection?

Yes

Disconnect CN923 and measure the voltage between the pins using tester.

Yes

The solenoid valve is normal.

Check the ambient temperature thermistor (RT65) in the outdoor unit.

Trouble of the solenoid valve.

Trouble of the solenoid valve itself.

Yes

Measure the solenoid valve resistance.

Is the resistance normal ? (Open or short: abnormal) Refer to 11-5.

No

Trouble of the solenoid valve coil.

Yes

Does it repeat to go 0V and 230VAC at 5 second interval?

No

Are the cords between CN726, CN727 on the outdoor power P.C. board and CN725 on the outdoor inverter P.C. board firmly connected without disconnection or loose connection?

Yes

Measure the voltage between CN725 8 (+) and 2 (GND) on the outdoor inverter P.C.

board.

No

Correct the connection.

Does it repeat to go 0V and 12VDC at 5

second interval?

No


Yes



OB379 --2qxp 05.1.17 16:38 Page 42


Q Electromagnetic noise enters into TV sets or radios

No

Is the unit earthed?

Earth the unit.

Yes

Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m?

Yes

Extend the distance between the antennas and the indoor unit, or the antennas and the outdoor unit.

No

Is the distance between the

TV sets or radios and the indoor unit within 1m, or is the distance between the TV sets or radios and the outdoor unit within 3m?

No

Is there any antennas damage by rust or something , coaxial cable damage, or poor contact such as loosing of the connectors or wire disconnection of wiring of the antennas?

No

Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas in close?

No

Yes

Yes

Yes

Extend the distance between the TV sets or radios and the indoor unit, or the TV sets or radios and the outdoor unit.

Replace the antennas.

Replace the coaxial cable.

Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas.

Even if all of the above conditions is fulfilled, the electromagnetic noise may enter, depending on the electric field strength or the installation condition (combination of specific conditions such as antennas or wiring).

Check the followings before asking for service.

1.Devices affected by the electromagnetic noise

TV sets, radios (FM/AM broadcast, shortwave)

2.Channel, frequency, broadcast station affected by the electromagnetic noise

3.Channel, frequency, broadcast station unaffected by the electromagnetic noise

4.Layout of ;

indoor/outdoor unit of the air condioner, indoor/outdoor wiring, grounding wire, antennas, wiring

from antennas, receiver

5.Electric field intensity of the broadcast station affected by the electromagnetic noise

6.Presence or absence of amplifier such as booster

7.Operation condition of air conditioner when the electromagnetic noise enters in.

1)Turn OFF the power supply once, and then turn ON the power supply. In this situation check for

the electromagnetic noise.

2)Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button

on the remote controller for power-on, and check for the electromagnetic noise.

3)After a short time (3 minutes later after turning ON), the outdoor unit starts running. During

operation, check for the electromagnetic noise.

4)Press OPERATE/STOP (ON/OFF) button on the remote controller for power off, when the

outdoor unit stops but the indoor/outdoor communication still runs on. In this situation check for

the electromagnetic noise.

After checking the above, consult the service representative.


OB379 --2qxp 05.1.17 16:38 Page 43


11-7. Test point diagram and voltage.

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

1. Inverter P.C. board

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

Back side of unit

Output to drive compressor

(LDV,LDW,LDU)

Smoothing capacitor

(C63C)

Smoothing capacitor

(C63B)

Smoothing capacitor

(C63A)

DB61

280V ~ 370V

DC

(+) (-)

1 (+)

2 (+)

3 (+)

4 5V

5 GND

LED monitor lamp

Jumper wire for change in defrost setting (JS)

Front side of unit

Connecting wire with power P.C.

board

(CN725)

230V AC

DB61

LEV connector

(CN724)

Output to drive outdoor fan motor

(CN932)

MUZ-GA35VA

MUZ-GA35VAH

200

Fin temperature thermistor(RT64)

180

160

140

120

100

80

60

40

20

0

0 10 20 30 40 50 60 70 80

Temperature( : )

100

Defrost thermistor(RT61)

Ambient temperature thermistor(RT65)

90

80

70

60

50

40

30

20

10

0

-20 -10 0 10 20 30 40


700

Discharge temperature thermistor(RT62)

600

500

400

300

200

100

0

0 10 20 30 40 50 60 70 80 90 100 110 120



OB379 --2qxp 05.1.17 16:38 Page 44


MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

2. Power P.C. board

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

Back side of unit

MUZ-GA25VA

MUZ-GA25VAH

Solenoid valve coil

(CN923)

230V AC

Varistor

(NR63)

Varistor

(NR62)

Varistor

(NR64)

Front side of unit

230V AC

MUZ-GA25VA

MUZ-GA25VAH

Output to drive outdoor

Fan motor(CN771)

230V AC

R.V.coil(CN721)

230V AC

Connecting wire with inverter P.C.board

(CN726)

Refer to 11-6.

M

230V AC

Heater connector

(CN722)

Refer to 11-6.

M

MUZ-GA25VAH

MUZ-GA35VAH


OB379 --2qxp 05.1.17 16:38 Page 45


12 DISASSEMBLY INSTRUCTIONS

<"Terminal with locking mechanism" Detaching points>

The terminal which has the locking mechanism can be detached as shown below.

There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism.

The terminal without locking mechanism can be detached by pulling it out.

Check the shape of the terminal before detaching.

(1) Slide the sleeve and check if there is a locking lever or not.

(2) The terminal with this connector has the

locking mechanism.

Sleeve

Locking lever

1 Slide the sleeve.

2 Pull the terminal while

pushing the locking

lever.

1 Hold the sleeve, and

pull out the terminal

slowly.

Connector

MUZ-GA25VA -

E1

MUZ-GA35VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VAH -

OUTDOOR UNIT

E1

OPERATING PROCEDURE

1. Removing the cabinet.

(1) Remove the screw fixing the service panel. (See Photo 2.)

(2) Pull down the service panel and remove it. (See Photo 2.)

(3) Disconnect the power supply and indoor/outdoor connecting wire.

(4) Remove the screws fixing the top panel. (See Photo 1.)

(5) Remove the top panel. (See Photo 1.)

(6) Remove the screws fixing the cabinet.

(7) Remove the cabinet.

(8) Remove the screws fixing the back panel.

(9) Remove the back panel.

PHOTOS

Photo 1

Screws of the top panel

Screws of the cabinet Screws of the top panel

Photo 2

Back panel

Screw of the service panel

Direction to remove

Screws of the cabinet

Hooks

Service panel

Screws of the cabinet


OB379 --2qxp 05.1.17 16:38 Page 46



2. Removing the inverter assembly, inverter P.C. board and power P.C. board

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to 1.)

(3) Disconnect the ground wires (See Photo 3.), the lead wire to the reactor and the following connectors;

<Power P.C. board>

CN721 (4-way valve)

CN771 (Fan motor) MUZ-GA25VA/GA25VAHE1

CN722 (Defrost heater) MUZ-GA25/GA35VAHE1

CN923 (Solenoid valve coil) MUZ-GA25VA/GA25VAH-

<Inverter P.C. board>

E1

CN931,CN932 (Fan motor) MUZ-GA35VA/GA35VAHE1

CN641 (Defrost thermistor and discharge temperature thermistor)

CN643 (Ambient temperature thermistor)

CN724 (LEV) MUZ-GA35VA/GA35VAHE1

(4) Remove the compressor connector (CN61).

(5) Remove the screws fixing the relay panel. (See Photo 3.)

(6) Remove the inverter assembly. (See Photo 3.)

(7) Disconnect all connectors and lead wires on the inverter

P.C. board. (See Photo 4.)

(8) Remove the inverter P.C. board from the inverter assembly.

(9) Remove the screw fixing the power P.C. board. (See Photo

4.)

(10) Disconnect all connectors and lead wires on the power P.C.

board.

(11) Remove the power P.C. board from the inverter assembly.

Photo 3

Photo 4

Heat sink

PHOTOS

Screws of the relay panel

Inverter

P.C. board

Screws of the ground wires

Power

P.C. board

3. Removing R.V. coil


(Refer to 1.)


(3) Remove the inverter assembly. (Refer to 2.)

(4) Remove the R.V. coil. (See Photo 5.)

Screw of the power P.C. board

R.V. coil

4. Removing the discharge temperature thermistor and defrost thermistor


(Refer to 1.)



(4) Pull out the discharge temperature thermistor from its holder. (See Photo 5.)

(5) Pull out the defrost thermistor from its holder. (See Photo 6.)

Photo 5


Discharge temperature thermistor

OB379 --2qxp 05.1.17 16:38 Page 47



5. Removing outdoor fan motor


(Refer to 1.)


(3) Disconnect the connectors for outdoor fan motor.

(4) Remove the propeller nut.

(5) Remove the propeller.

(6) Remove the screws fixing the fan motor. (See Photo 7.)

(7) Remove the fan motor.

6. Removing the compressor and 4-way valve


(Refer to 1.)



(4) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa).

(5) Detach the welded part of the suction and the discharge pipe connected with compressor.

(6) Remove the nuts of compressor legs.

(7) Remove the compressor.

(8) Detach the welded part of pipes connected with 4-way valve. (See Photo 8.)

Photo 6

PHOTOS

Photo 7

Defrost thermistor

Screws of the outdoor fan motor

Propeller

Photo 8


Welded parts of 4-way valve

OB379 --2qxp 05.1.17 16:38 Page 48


13 PARTS LIST

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

23 20 19 18 17 16 15 14 10 9

24

1

2

22

21

13

11

12

3 4 5 6

7 8


OB379 --2qxp 05.1.17 16:38 Page 49


MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

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

No.

Part No.

Part Name

1

2

3

4

5

10

11

12

8

9

6

7

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

E02 928 525

E02 928 523

E02 838 523

E02 927 293

E02 928 293

E02 838 515

E02 927 515

E02 927 297

E02 927 630

E02 931 301

E02 927 301

E02 840 526

E02 840 381

E02 927 937

E02 096 936

E02 156 936

E02 096 642

E02 932 490

E02 931 492

E02 927 232

E02 927 521

E02 931 501

E02 927 501

E02 927 290

E02 928 290

E02 928 900

E02 927 900

E02 065 506

E02 927 661

E02 927 662

E02 927 245

E02 927 233

E02 838 640

E02 927 493

E02 927 961

E02 931 961

E02 928 079

CABINET

GRILLE

PROPELLER

PROPELLER

BASE

BASE

COMPRESSOR

COMPRESSOR

COMPRESSOR RUBBER SET

STOP VALVE (GAS)

STOP VALVE (LIQUID)

SERVICE PANEL

BACK PANEL

EXPANSION VALVE

EXPANSION VALVE COIL

4-WAY VALVE

4-WAY VALVE

THERMO HOLDER

CONDENSER WIRE NET

CONDENSER NET

CONDENSER NET

SEPARATOR

SEPARATOR

MOTOR SUPPORT

MOTOR SUPPORT

TOP PANEL

OUTDOOR HEAT EXCHANGER

OUTDOOR FAN MOTOR

OUTDOOR FAN MOTOR

DEFROST HEATER

HEATER PROTECTOR

CAPILLARY TUBE

CAPILLARY TUBE

CAPILLARY TUBE

CHECK VALVE

SOLENOID VALVE COIL

SOLENOID VALVE

Symbol Q'ty/unit in Wiring

Diagram

MUZMUZ-

GA25VA- GA25VAH-

E1 E1

MUZMUZ-

GA35VA- GA35VAH-

E1 E1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

MC

MC

1

1

1

1

LEV

3

1

1

1

1

3

1

1

1

1

1

1

1

1

1

1

1

1

3

1

1

1

1

1

1

1

1

3

Remarks

KNB065FDTH

KNB073FDVH

3RUBBERS/SET

{ 9.52

{ 6.35

1 1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

MF

MF

H

26H

21R1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

RA6V21-

RC0J50-

{ 3.0

✕{ 2.0

✕ 240

{ 3.0

✕{ 1.4

✕ 800

{ 3.0

✕{ 1.4

✕ 500


OB379 --2qxp 05.1.17 16:38 Page 50


MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

13-2. OUTDOOR UNIT ELECTRICAL PARTS

9

10

8

7

6

1 2 3 4 5

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

No.

1

2

3

4

7

8

5

6

9

10

11

12

Part No.

E02 838 337

E02 927 444

E02 931 444

E02 928 444

E02 932 444

E02 927 490

E02 928 490

E02 927 306

E02 927 308

E02 735 241

E02 735 382

E02 573 375

E02 927 374

E02 928 451

E02 932 451

E02 931 451

E02 934 451

E02 127 382

E02 661 385

Part Name

Symbol

Q'ty/unit in Wiring

Diagram

MUZ-

GA25VA-

E1

MUZ-

GA25VAH-

MUZ-

GA35VA-

E1 E1

MUZ-

GA35VAH-

E1

REACTOR

POWER P.C. BOARD




R.V. COIL

R.V. COIL

THERMISTOR SET

AMBIENT TEMPERATURE THERMISTOR

FUSE HOLDER

FUSE

TERMINAL BLOCK

TERMINAL BLOCK

INVERTER P.C. BOARD




FUSE

VARISTOR

L61

21S4

21S4

RT61,RT62

RT65

F61

TB1

TB2

F71,F801

NR62,NR63,NR64

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remarks

DEFROST, DISCHARGE

250V/20A

3P

3P

Including heat sink and RT64




250V/3.15A


OB379 --2qxp 05.1.17 16:38 Page 51


MUZ-GA25VA -

E1

MUZ-GA35VA -

13-3. DRAIN SOCKET

E1

Outdoor unit { 42 drain hole

1

Soft vinyl chloride hose of

25mm inside diameter.

No.

Parts No.

Parts Name

1 E02 838 704 DRAIN SOCKET

Symbol in Wiring

Diagram

MUZ-GA25VA-

Q'ty/unit

E1 MUZ-GA35VAE1

1 1

Remarks

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

13-4. QUICK CLEAN KIT

● You can clean the surface of the heat exchanger and line flow fan if you attach QUICK CLEAN KIT to your vacuum cleaner.

2 3 4

No.

Parts No.

Parts Name

2

3

4

E02 927 113

E02 927 115

E02 927 112

BRUSH

NOZZLE

UNIVERSAL ADAPTER heat exchanger

Symbol in Wiring

Diagram

Q'ty/unit

MUZMUZMUZ-

GA25VA- GA25VAH- GA35VA-

E1 E1 E1

1

1

1

1

1

1

1

1

1

MUZ-

E1

1

1

1

Remarks


OB379 --2qxp 05.1.17 16:38 Page 52


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

C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD

Distributed in Jan. 2005. No. OB379 6

Made in Japan

New publication, effective Jan. 2005

Specifications subject to change without notice.

www.ilmalämpöpumput.com

Mitsubishi Electric GA MUZ-GA25VA, GA MUZ-GA35VA, GA MUZ-GA25VAH, GA MUZ-GA35VAH air conditioner Service manual

Assistant Bot

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type

Models

1 TECHNICAL CHANGES

2 PART NAMES AND FUNCTIONS

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

3 SPECIFICATION

4 NOISE CRITERIA CURVES

5 OUTLINES AND DIMENSIONS

6 WIRING DIAGRAM

MODEL WIRING DIAGRAM

MODEL WIRING DIAGRAM

MODEL WIRING DIAGRAM

MODEL WIRING DIAGRAM

7 REFRIGERANT SYSTEM DIAGRAM

8 PERFORMANCE CURVES

9 ACTUATOR CONTROL

10 SERVICE FUNCTIONS

11 TROUBLESHOOTING

Lead wiring Housing point

12 DISASSEMBLY INSTRUCTIONS

<"Terminal with locking mechanism" Detaching points>

13 PARTS LIST

Key Features

Frequently Answers and Questions

What type of refrigerant do these air conditioners use?

Is there a separate manual for the indoor units?

What type of control system do the air conditioners have?

Related manuals

Mitsubishi Electric GA MUZ-GA25VA, GA MUZ-GA35VA, GA MUZ-GA25VAH, GA MUZ-GA35VAH air conditioner Service manual

Assistant Bot

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type

Models

1 TECHNICAL CHANGES

2 PART NAMES AND FUNCTIONS

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

3 SPECIFICATION

4 NOISE CRITERIA CURVES

5 OUTLINES AND DIMENSIONS

6 WIRING DIAGRAM

MODEL WIRING DIAGRAM

MODEL WIRING DIAGRAM

MODEL WIRING DIAGRAM

MODEL WIRING DIAGRAM

7 REFRIGERANT SYSTEM DIAGRAM

8 PERFORMANCE CURVES

9 ACTUATOR CONTROL

10 SERVICE FUNCTIONS

11 TROUBLESHOOTING

Lead wiring Housing point

12 DISASSEMBLY INSTRUCTIONS

<"Terminal with locking mechanism" Detaching points>

13 PARTS LIST

Key Features

Frequently Answers and Questions

What type of refrigerant do these air conditioners use?

Is there a separate manual for the indoor units?

What type of control system do the air conditioners have?

Related manuals

Mitsubishi Electric

MSZ-AH 12VA-H1

Bosch

WFL2480SN/01

Mitsubishi Electric

MUZ-GA 35VAH

Mitsubishi Electric

MUZ-FA25 VA

Mitsubishi Electric

MSZ-A09RV E1 (WH)

Mitsubishi Electric

GA25VA E1, E2, E3, E4

Mitsubishi Electric

MSZ-GA 22VA

Mitsubishi Electric

MUZ-FA 35VAH

Mitsubishi Electric

GA MSZ-GA22VA

Mitsubishi Electric

MUZ-A12YVH E1

Mitsubishi Electric

MSZ-FH-VE FH25VE

Toshiba

RAV-SP 404ATZ-E