Mitsubishi MSZ-GC22VA-E1, MSZ-GC25VA-E1, MSZ-GC35VA-E1 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Wireless type Models

Revision B:

• has been added. Please void OBH468 REVISED EDITION-A.

No. OBH468

REVISED EDITION-B

MSZ-GC22VA MSZ-GC22VA MSZ-GC25VA MSZ-GC25VA MSZ-GC35VA MSZ-GC35VA -

Outdoor unit service manual MUZ-GC·VA Series (OBH469) MXZ-A·VA Series (OB377) MXZ-8A140A (OC316)

CONTENTS

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

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

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

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

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

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

7. REFRIGERANT SYSTEM DIAGRAM················6

8. SERVICE FUNCTIONS ······································7

9. MICROPROCESSOR CONTROL ······················9

10. TROUBLESHOOTING ······································14

11. DISASSEMBLY INSTRUCTIONS·····················26

PARTS CATALOG (OBB468)

NOTE:

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

Air outlet

Vertical vane

Air inlet

Operation Indicator lamp

Front panel

Catechin air filter

Horizontal vane

Remote controller

Remote control receiving section

Emergency operation switch (E.O. SW)

Air cleaning filter (Anti-allergy enzyme filter, option)

Line flow fan

Revision A:

• 10.TROUBLESHOOTING has been corrected.

• Color of lead wire (indoor fan motor : sensor part) of 10-5.”Trouble criterion of main parts” has been corrected.

• 10-6.”ACheck of indoor fan motor” has been corrected.

Revision B:

• has been added.

TECHNICAL CHANGES

MSZ-GA22VA - ➔ MSZ-GC22VA MSZ-GA25VA - ➔ MSZ-GC25VA MSZ-GA35VA - ➔ MSZ-GC35VA -

1. Indoor model has been changed.

MSZ-GC22VA - ➔ MSZ-GC22VA MSZ-GC25VA - ➔ MSZ-GC25VA MSZ-GC35VA - ➔ MSZ-GC35VA -

1. Panel has been changed.

PART NAMES AND FUNCTIONS

MSZ-GC22VA MSZ-GC25VA MSZ-GC35VA

E1E1 E1E1

E1E1

E2E1 E2E1

E2E1

Fuse Horizontal vane motor Varistor Terminal block

(F11)

(MV)

(NR11)

(TB)

T3.15AL 250V

12V DC

S10K320E3K1(ERZV14D471)

MSZ-GC25VA MSZ-GC35VA

Single phase

230V,50Hz

0.22 40

0.22

788O295O234

9 4

KM05B

36/29/22

Cooling

576

462/354/246

1,070

890/720/550

Heating

600

480/378/276

1,100

920/760/600

MSZ-GC22VA

Indoor model

Function

Power supply

36/29/21

Cooling

576

462/354/246

1,070

890/720/550

Heating

600

480/378/276

1,100

920/760/600

RC4V18-BA or CA

Cooling

552

444/330/234

1,110

930/740/580

Heating

570

462/354/246

1,140

960/780/600

Air flow(Super High) Air flow(High/Med./Low) Running current ✽1 Power input ✽1 Fan motor current ✽1 Model Dimensions WOHOD Weight Air direction Sound level (Super High) Sound level (High/Med./Low) Fan speed (Super High) Fan speed (High/Med./Low) Fan speed regulator Remote controller model

K /h K /h

dB(A) dB(A)

rpm rpm

Electrical

data

Fan motor

Special

remarks

Capacity

MSZ-GC22VA MSZ-GC25VA MSZ-GC35VA

ACCESSORIES

Installation plate

Installation plate fixing screw 4 o 25 mm

Remote controller holder

Fixing screw for 3 3.5 o 1.6 mm (Black)

Battery (AAA) for remote controller

Wireless remote controller

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

SPECIFICATION

1 5 1 2 2 1 1

NOTE : Test conditions are based on ISO 5151

Specifications and rating conditions of main electric parts

Cooling : Indoor Dry-bulb temperature 27

Outdoor Dry-bulb temperature 35:

Heating : Indoor Dry-bulb temperature 20:

Outdoor Dry-bulb temperature 7:Wet-bulb temperature 6: Refrigerant piping length (one way): 5m ✽1 Measured under rated operating frequency.

:Wet-bulb temperature 19:

INDOOR UNIT

WALL

MICROPHONE

0.8m

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

Test conditions Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

Heating : Dry-bulb temperature 20:

43 43

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

43 43

NOISE CRITERIA CURVES

MSZ-GC22VA MSZ-GC25VA

MSZ-GC35VA

7459

41.5

214

235

253.5

18.5

320335

155 155

21540.5

254.5

5959 225 225

295

53 607 128

100

137

119

Piping

Insulation

[35 O.D

Liquid line

[6.35 - 0.5 m (Flared connection [6.35)

Gas line

[9.52 - 0.43 m (Flared connection [9.52)

Drain hose

Insulation [28 O.D Connected part [16 O.D

11 X 26 Oblong hole

X 20 Oblong hole

Installation plate

Indoor unit

Wall hole

[65

Air in

Air out

Installation plate

Piping

Drain hose

159

234

788

OUTLINES AND DIMENSIONS

MSZ-GC22VA MSZ-GC25VA MSZ-GC35VA

Unit : mm

Refrigerant flow in cooling Refrigerant flow in heating

Indoor heat exchanger

Flared connection

Room temperature thermistor RT11

Flared connection

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

Indoor coil thermistor RT12 (main)

Indoor coil thermistor RT13 (sub)

WIRING DIAGRAM

MSZ-GC22VA MSZ-GC25VA MSZ-GC35VA

REFRIGERANT SYSTEM DIAGRAM

Unit : mm

No. 1 unit No. 2 unit No. 3 unit No. 4 unit

1 unit operation No modification

– – –

2 units operation

Same as at left

Solder J1

– –

3 units operation

Same as at left Same as at left

Solder J2

–

4 units operation

Same as at left Same as at left Same as at left

Solder both J1 and J2

SERVICE FUNCTIONS

MSZ-GC22VA MSZ-GC25VA MSZ-GC35VA

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows. (Refer to 10-7.) Set time : 1-minute ➔ 1-second Set time : 3-minute ➔ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is

shortened by short circuit of JPG and JPS.)

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification. The board has a print as shown below :

NOTE : For modification, take out

the batteries and press the OPERATE/STOP(ON/OFF) button twice or 3 times at first. After modification, put back the batteries then press

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1. After modification, press the RESET button.

the RESET button.

Table 1

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit. The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker is turned OFF, or the power supply is shut down. Please conduct the above setting once again after the power has restored.

JR07

Indoor electronic control P.C. board

CN10A CN111CN151 CN112

8-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power.

Operation

If the main power has been cut, the operation settings remain.

2 After the power is restored, the unit restarts automatically according to the memory.

(However, it takes at least 3 minutes for the compressor to start running.)

How to release “AUTO RESTART FUNCTION”

Turn off the main power for the unit.

2Solder the jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 10-7.)

NOTE :

• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the

remote controller.

• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is

cancelled.

• If the unit has been off with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is off.

• To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the

same time.

• When some air conditioners are connected to the same supply system, if they are operated before power failure,

the starting current of all the compressors may flow simultaneously at restart. Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one.

ON TIMER button

CLOCK SET button

TIME SET buttons FORWARD button BACKWARD button

OFF TIMER button

Open the front lid.

RESET button

VANE CONTROL button

Signal transmitting section

Operation display section

Temperature buttons

OPERATE/STOP (ON/OFF) button

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

Indication of remote controller model is on back

MICROPROCESSOR CONTROL

MSZ-GC22VA MSZ-GC25VA MSZ-GC35VA

WIRELESS REMOTE CONTROLLER

Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP (ON/OFF) button ON. Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to protect system from overload and compressor will not restart for 3 minutes.

INDOOR UNIT DISPLAY SECTION

Operation Indicator lamp

The operation indicator at the right side of the indoor unit indicates the operation state.

•The following indication applies regardless of shape of the indicator.

Indication

Operation state

The unit is operating to reach the set temperature

The room temperature is approaching the set temperature

Standby mode (only during multi system operation)

Room temperature

About 2 : or more away from set temperature

About 1 to 2 : from set temperature

Lighted Blinking

Not lighted

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