Mitsubishi Electric MS-GA50VB-E1 Service Manual Download Page 3

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REMOTE CONTROLLER

MS-GA50VB -
MS-GA60VB -
MS-GA80VB -

ON/OFF

TOO

COOL

TOO

WARM

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

WIDE VANE

LONG

I FEEL COOL

DRY

CLOCK

RESET CLOCK

FAN

Open the front lid.

Signal transmitting section

Operation display section

OPERATE/ STOP

(ON/ OFF)button

TEMPERATURE buttons

OPERATION SELECT button

FAN SPEED CONTROL button

OFF-TIMER button

HR. button

MIN. button

(TIME SET button)

ON-TIMER button

RESET button

ECONO COOL button

VANE button

(Horizontal vane button)

CLOCK SET button

LONG button

WIDE VANE button

(Vertical vane button)

Indication of remote controller
model is on back.

OB369-1.qxp 04.10.14 1:37 PM Page 3

Summary of Contents for MS-GA50VB-E1

Page 1: ...1 10 DISASSEMBLY INSTRUCTIONS 19 11 PARTS LIST 21 12 OPTIONAL PARTS 23 Wireless type Models MS GA50VB WH MS GA60VB WH MS GA80VB WH E1 E1 E1 No OB369 SPLIT TYPE AIR CONDITIONERS MS GA50VB MS GA60VB MS GA80VB E1 E1 E1 NOTE This service manual describes technical data of the indoor units As for outdoor units MU GA50VB MU GA60VB and MU GA80VB refer to service manual OB370 E1 E1 E1 Indication of model ...

Page 2: ...S GA60VB MS GA80VB E1 E1 E1 MS A18WV MS GA50VB MS A24WV MS GA60VB MS A30WV MS GA80VB 1 Model name has been changed Indication of capacity has been changed BTU kW 2 Grille design has been changed 3 Unit size has been changed W 1 100aoH 325aoD 227a W1 100aoH 325aoD 258a E1 E1 E1 E1 E1 E1 ACCESSORIES Indoor unit 1 2 3 4 5 6 7 Installation plate Installation plate fixing screw 4 o 25 mm Remote control...

Page 3: ...Signal transmitting section Operation display section OPERATE STOP ON OFF button TEMPERATURE buttons OPERATION SELECT button FAN SPEED CONTROL button OFF TIMER button HR button MIN button TIME SET button ON TIMER button RESET button ECONO COOL button VANE button Horizontal vane button CLOCK SET button LONG button WIDE VANE button Vertical vane button Indication of remote controller model is on bac...

Page 4: ...M04B Electrical data Fan motor Special remarks Capacity w w w w w w w w w w w w w w w w w w NOTE Test conditions are based on ISO 5151 Cooling Indoor DB27 C WB19 C Outdoor DB35 C WB 24 C Indoor Outdoor piping length 5m w Reference value Indoor model Function Power supply Air flow High Med Low Power outlet Running current Power input Auxiliary heater Power factor Fan motor current Model Winding res...

Page 5: ... BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb temperature 27 Wet bulb temperature 19 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 42 SPL dB A LINE High FAN SPEED OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb ...

Page 6: ...on 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 MS GA50VB for MS GA60 GA80VB Power supply cord Lead to right 2 0m Lead to left 1 0m INDOOR UNIT MS GA50VB MS GA60VB MS GA80VB E1 E1 E1 Unit mm OB369 1 qxp 04 10 14 1 37 PM Page 6 ...

Page 7: ... THERMISTOR SOLID STATE RELAY TERMINAL BLOCK MF 1 2 3 4 5 6 PE CIRCUIT BREAKER POWER SUPPLY CORD N 230V 50Hz INDOOR UNIT 12V TO OUTDOOR UNIT CONNECTING BRN BLU GRN YLW BLK GRY YLW BRN WHT RED MF 3 SR141 4 3 1 CN 121 C11 HIC1 MV1 RT13 4 3 2 1 CN112 151 CN MV2 15 RT12 RT11 111 CN CN211 NR11 ELECTRONIC CONTROL P C BOARD F11 3 N L BRN 1 2 3 CN201 MV2 BLU RED CN 101 CN 102 DISPLAY P C BOARD RECEIVER P ...

Page 8: ...ooling MS GA50VB E1 INDOOR UNIT Indoor heat exchanger Room temperature thermistor RT11 Refrigerant pipe 12 7 with heat insulator Flared connection Flared connection Indoor coil thermistor RT12 Refrigerant pipe 6 35 with heat insulator Distributor MS GA60VB E1 INDOOR UNIT Indoor heat exchanger Room temperature thermistor RT11 Refrigerant pipe 15 88 with heat insulator Flared connection Flared conne...

Page 9: ...n press the RESET button MS GA50VB MS GA60VB MS GA80VB E1 E1 E1 NOTE For remodelling take out the bat teries and press the OPERATE STOP ON OFF button twice or 3 times at first After finish remodelling put back the batteries then press the RESET button Remote controller model KM04B J2 J1 Table 1 No 1 unit No 2 unit No 3 unit No 4 unit 1 unit operation No modification 2 units operation Same as at le...

Page 10: ... 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 appliances 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 t...

Page 11: ...r 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 ...

Page 12: ...tor 3 time flash Cause Indoor unit Trouble of indoor fan motor MU GA80VB 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit MU GA80VB 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer to 9 5 D How to check mis wiring When outdoor unit doesn t work Check room temperature thermistor and indoor coil thermis tor Refer to 9 6 Test point diagram and voltage Refer...

Page 13: ...fer to service manual OB370 Refer to 9 5 D How to check mis wiring 3 Indoor fan motor 7 MU GA80VB Low discharge tempera ture protection When discharge temperature has been 50 or less on cool operation Abnormal point Outdoor unit does not operate Room temperature thermistor 2 time flash 2 5 second OFF Detect Indoor coil room temperature thermistor short or open circuit every 8 seconds during operat...

Page 14: ...l vane motor MV1 Vertical vane motor MV2 Motor part Sensor part Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Color of lead wire BRN YLW YLW GRY Abnormal Remain 0V or 5V Normal 4 5 5 5V Measure the voltage power ON When fan revolved one time 0V 5V 0V Approx Normal 282 306 Abnormal Open or short circuit Measure the resistance between the terminal with a teste...

Page 15: ...board connector CN301 No 2 and No 1 when the remote controller button is pressed Is the voltage approx 4V DC Replace the indoor electronic control P C board Replace the receiver P C board Replace the remote controller Reinstall the unit away from lights Attach a filter on receiving part Yes 0 or No others Yes No Yes No Switch on the remote controller Is LCD display on the the remote controller vis...

Page 16: ... the power supply Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P C board and turn ON the power supply No No Does the unit operate with the remote controller Does the OPERATION INDICATOR lamp light up by pressing the EMERGENCY OPERATION switch Yes No Yes Turn OFF the power supply Turn OFF the power supply Varistor NR11 Indoor electronic c...

Page 17: ...ace the indoor electronic control P C board Is there 230V AC between L N on the outdoor terminal block No Check the outdoor power supply and connection of wiring Yes No Replace the deicer P C board Yes No Make the wiring between CN730 on the deicer P C board and outdoor terminal block correct Replace the deicer P C board Yes Is there 5V DC between J101 J401 MU GA80VB on the deicer P C board Yes Ye...

Page 18: ... thermistor RT12 main Timer short mode point JPS JPG Refer to page 9 Emergency operation switch 12V DC Indoor coil thermistor RT12 main RT13 sub Room temperature thermistor RT11 Resistance k Room temperature ther mistor RT11 Release of Auto restart function Solder jumper wire to JR07 Refer to page 10 MS GA80VB Indoor coil thermistor RT13 sub R132 Receiver P C board OB369 1 qxp 04 10 14 1 37 PM Pag...

Page 19: ...anel Remove the screws 2 Pull the panel down to your side slightly and unhook the catches at the top Photo 1 Photo 2 Front panel Screw of the V A clamp Indoor electronic control P C board Vane motor connector Fan motor connectors Screws of the ground wire Screws Screw of the electri cal cover R L holder Screw of the termi nal block Receiver P C board 2 Removing the electronic control P C board the...

Page 20: ...he nozzle assembly and remove the nozzle assembly 6 Remove the screws of the vane motor and disconnect the connector 7 Remove the vane motor Screws fixing the fan motor 5 Removing the line flow fan and the indoor fan motor 1 Remove the front panel Refer to 1 2 Remove the electrical box Refer to 3 3 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 4 Remove the water c...

Page 21: ...unit Including No 4 5 6 4PCS SET 3PCS SET Remarks Part No No Part Name 1 2 3 4 5 6 7 8 9 1 1 1 4 3 1 2 1 1 1 1 1 4 3 1 2 1 1 1 1 1 4 3 1 2 1 1 11 2 INDOOR UNIT HEAT EXCHANGER 2 4 5 7 6 1 10 8 11 12 3 CATCH SCREW CAP E02 891 620 E02 893 620 E02 179 667 E02 138 666 E02 151 667 E02 527 667 INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER UNION GAS UNION GAS UNION LIQUID UNION LIQUID 12 7 15 88 6 35 9 52 1...

Page 22: ...VANE MOTOR SUPPORT SET RIGHT VANE MOTOR SUPPORT SET LEFT Symbol in Wiring Diagram Q ty unit 3 15A RIGHT LEFT UP DOWN Remarks Part No No Part Name F11 NR11 MF MF MV2 MV1 RT11 TB TB RT12 RT12 RT13 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 MS GA50 VB WH E1 MS GA60 VB WH E1 MS GA80 VB WH E1 RC4V32 Including RUBBE...

Page 23: ...FILTER is 4 months However when it becomes dirty replace it as soon as possible Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet DO NOT reuse AIR CLEANING FILTER even if it is washed DO NOT remove or attach AIR CLEANING FILTER during unit operation Model Part No MAC 1700FT MS GA50VB E1 MS GA60VB E1 MS GA80VB E1 OB369 1 qxp 04 10 14 1 37 PM Page 2...

Page 24: ...ject to change without notice C C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Oct 2004 No OB369 6 Made in Japan HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN OB369 1 qxp 04 10 14 1 37 PM Page 24 ...

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