Mitsubishi MSZ-GA50VA, MSZ-GA60VA, MSZ-GA71VA Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Wireless type Models

Revision:C

• PARTS LIST and RoHS PARTS LIST have been changed.

Please void OB388 REVISED EDITION-B

No. OB388

REVISED EDITION-C

MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA -

Outdoor unit service manual MUZ-GA•VA Series (OB389) MXZ-A•VA Series (OB377)

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················3

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

4. NOISE CRITERIA CURVES·······························6

5. OUTLINES AND DIMENSIONS·························7

6. WIRING DIAGRAM ············································8

7. REFRIGERANT SYSTEM DIAGRAM················9

8. SERVICE FUNCTIONS ····································10

9. TROUBLESHOOTING······································12

10. DISASSEMBLY INSTRUCTIONS·····················24

11. PARTS LIST······················································27

12. RoHS PARTS LIST···········································28

13. OPTIONAL PARTS ···········································30

NOTE:

RoHS compliant products have <G> mark on the spec name plate. For servicing of RoHS compliant products, refer to the RoHS Parts List.

Model Revise point

11-2.No.10

MSZ-GA60VA -

Part Name

E02 819 620 E02 851 620

INDOOR HEAT EXCHANGER

Incorrect Correct

Part No.

Revision:A

Part number of INDOOR HEAT EXCHANGER has been corrected..

Revision:B

• RoHS PARTS LIST has been added.

• 9-2. Failure mode recall function has been

changed.

Revision:C

• PARTS LIST and RoHS PARTS LIST have been changed.

MSZ-A18YV - ➔ MSZ-GA50VA MSZ-A24YV - ➔ MSZ-GA60VA MSZ-A26YV - ➔ MSZ-GA71VA -

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

2. Power supply cord has been removed.

3. Indoor electronic control P.C. board has been changed.

4. Indoor fan motor has been changed. ( AC ➔ DC)

5. Shape of motor band and motor bed have been changed.

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

TECHNICAL CHANGES

E1E1 E1E1 E1E1

Grille

(When the grille is opened)

Remote controller

Operation section

Display section

Emergency operation switch

Operation indicator lamp

Air inlet

Remote control

receiving section

Horizontal vane

Vertical vanes

Air cleaning filter (option) (Anti-allergy enzyme filter:blue bellows type)

Catechin air filter

Remote control

receiving section

1 2 3 4 5 6 7

Installation plate Installation plate fixing screw 4 o 25 mm Remote controller holder Fixing screw for 3 o 3.5 o 1.6 mm (Black) Battery (AAA) for remote controller Wireless remote controller Felt tape (Used for left or left-rear piping)

1 7 1 2 2 1 1

PART NAMES AND FUNCTIONS

MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA

ACCESSORIES

REMOTE CONTROLLER

ON/OFF

TOO

COOL

TOO

WARM

LONG

Open the front lid.

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

TEMPERATURE buttons

Indication of remote controller model is on back.

ON-TIMER button

CLOCK SET button

TIME SET buttons FORWARD button BACKWARD button

VANE CONTROL button (Horizontal vane button)

OFF-TIMER button

LONG button

RESET button

WIDE VANE button (Vertical vane button)

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA

Indoor model

Function

Power supply

Air flow

(High/Med./Low) Power outlet Running current

✽1

Power input

✽1

Power factor

✽1

Fan motor current

✽1 Model Dimensions WOHOD Weight Air direction Sound level(High/Med./Low) Fan speed(High/Med./Low) Fan speed regulator Remote controller model

K /h

A W %

rpm

MSZ-GA50VA

Single phase

230V, 50Hz

852/690/498

0.45 50 48

0.45

RC0J56-AA

1,100O325O258

48/38/31

1,120/940/720

KM05C

Cooling

Heating

MSZ-GA60VA

Single phase

230V, 50Hz

0.60 60 43

0.60

RC0J56-AA

1,100O325O258

54/40/32

KM05C

Cooling

1,032/768/522

1,310/1030/750

Heating

1,032/786/522

1,310/1050/750

Electrical

data

Fan motor

Special

remarks

Capacity

Indoor model

Function

Power supply

Air flow(High/Med./Low) Power outlet Running current

✽1

Power input

✽1

Power factor

✽1

Fan motor current

✽1 Model Dimensions WOHOD Weight Air direction Sound level(High/Med./Low) Fan speed(High/Med./Low) Fan speed regulator Remote controller model

K /h

A W %

rpm

MSZ-GA71VA

Single phase

230V, 50Hz

0.60 60 43

0.60

RC0J56-AA

1,100O325O258

54/40/33

KM05C

Cooling

1,032/798/564

1,310/1,060/800

Heating

1,032/816/564

1,310/1,080/800

Electrical

data

Fan motor

Special

remarks

Capacity

SPECIFICATION

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C

Heating : Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15.5°C

✽1 Measured under rated operating frequency.

Outdoor Dry-bulb temperature 35°C Wet-bulb temperature(24°C) Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C

Indoor-Outdoor piping length 5m

63 125 250 500 1000 2000 4000 8000

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

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

SPL(dB(A)) LINE

High

FAN SPEED

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:

Fuse Vane motor Varistor Terminal block

(F11)

(MV1/ MV2)

(NR11)

(TB)

T3.15AL 250V

MP20/MP20

ERZV14D471

Specifications and rating conditions of main electric parts

63 125 250 500 1000 2000 4000 8000

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

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

SPL(dB(A)) LINE

High

FAN SPEED

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:

INDOORUNIT

WALL

MICROPHONE

0.8m

NOISE CRITERIA CURVES

MSZ-GA50VA MSZ-GA60VA

MSZ-GA71VA

258

159

7.5

315

255.547

2.5

173

98 173414.5 414.5

253

791

1068

1100

325

Air out

Air in

Insulation [28

Drain hose [16 (Connected part O.D)

Installation plate

Wall hole [75

Wireless remote controller

Installation plate

Indoor unit

{

Liquid line [ 6.35-0.5m Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D

{

Liquid line [ 9.52-0.5m Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D

for MSZ-GA50/60VA

for MSZ-GA71VA

OUTLINES AND DIMENSIONS

MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA

Unit: mm

MV2 MV2

152

101

BLU

CN211

RT12 RT11

BLK YLW

112

CN 111

WHT

RED

RT13

2 4

GRN

T111

151

CN201

LD104

12-24V

105(T)

F11

NR11

DB111

TAB3

RED

BLK

TO OUTDOOR

UNIT

CONNECTING

MV1

RECEIVER P.C.BOARD

SW P.C. BOARD

INDOOR ELECTRONIC CONTROL P.C. BOARD

BLU

230V~

POWER MONITOR P.C.BOARD

REMOTE CONTROLLER

SYMBOL

RT13

T111

SYMBOL

MV2 NR11 RT11 RT12

SYMBOL

DB111

F11

MV1

DIODE STACK FUSE (3.15A) INDOOR FAN MOTOR VANE MOTOR (HORIZONTAL)

VANE MOTOR (VERTICAL) VARISTOR ROOM TEMPERATURE THERMIST OR INDOOR COIL THERMISTOR (MAIN)

INDOOR COIL THERMISTOR (SUB) TRANSFORMER TERMINAL BLOCK

NAME

NAME NAME

1.About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.

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

3.Symbols below indicate.

: Connector

: Terminal block

NOTES:

WIRING DIAGRAM

MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA

Indoor heat exchanger

Flared connection

Room temperature thermistor RT11

Indoor coil thermistor RT13(sub)

Flared connection

Refrigerant pipe [15.88 (with heat insulator)

Refrigerant pipe [9.52 (with heat insulator)

Indoor coil thermistor RT12(main)

Strainer

#50

REFRIGERANT SYSTEM DIAGRAM

MSZ-GA50VA

Indoor heat exchanger

Indoor coil thermistor RT13(sub)

Room temperature thermistor RT11

Indoor coil thermistor RT12(main)

Distributor

Refrigerant pipe [12.7 (with heat insulator)

Flared connection

MSZ-GA60VA

Indoor heat exchanger

Indoor coil thermistor RT13(sub)

Room temperature thermistor RT11

Indoor coil thermistor RT12(main)

Distributor

Unit:mm

Refrigerant pipe [15.88 (with heat insulator)

Flared connection

MSZ-GA71VA

Refrigerant pipe[6.35 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

Refrigerant flow in cooling Refrigerant flow in heating

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-GA50VA MSZ-GA60VA MSZ-GA71VA

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. 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 finish modification, put back the batteries then press the RESET button.

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.

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 accepts 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 has turned off, or the power supply has shut down. Please conduct the above setting once again after the power has restored.

8-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure. Then, the unit will restart automatically.

+ 22 hidden pages