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Mitsubishi Electric MSH-GA50VB-E1, Service Manual

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Mitsubishi Electric MSH-GA50VB-E1 Service Manual Download Page 2

2

TECHNICAL CHANGES

1

MSH-A18WV  -

➔

MSH-GA50VB  -

MSH-A24WV  -

➔

MSH-GA60VB  -

MSH-A30WV  -

➔

MSH-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 1,100mm

o

H 325mm

o

D 227mm 

➔

W1,100mm

o

H 325mm

o

D 258mm)

E1

E1

E1

E1

E1

E1

Revision A:

•RoHS PARTS LIST has been added.

Revision B:

•RoHS PARTS LIST has been corrected.

Revision C:

• Another type of the electronic control P.C. board (TYPE 2) has been added to the original one (TYPE 1). They are both com-

patible with MSH-GA50/60/80VB-

.

E1

Use the specified refrigerant only

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.

Correct refrigerant is specified in the manuals and on the spec labels provided with our products.

We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by 

failure to follow the instructions.

Revision D:

• Parts numbers of indoor fan motor and motor band have been changed.
• Some descriptions have been modified.

OB367D-1.qxp  12.1.13 7:49 AM  Page 2

OB367D

Summary of Contents for MSH-GA50VB-E1

Page 1: ... E1 E1 E1 SPLIT TYPE AIR CONDITIONERS SERVICE MANUAL Models INDOOR UNIT NOTE This service manual describes technical data of the indoor units RoHS compliant products have G mark on the spec name plate For servicing of RoHS compliant products refer to the RoHS PARTS LIST RoHS compliant Outdoor unit service manual MUH GA VB Series OB368 No OB367 REVISED EDITION D Revision D Parts numbers of indoor f...

Page 2: ...o the original one TYPE 1 They are both com patible with MSH GA50 60 80VB E1 Use the specified refrigerant only Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for me...

Page 3: ...type Horizontal vane Vertical vanes Catechin air filter Remote control receiving section Front panel MSH GA50VB MSH GA60VB MSH GA80VB ACCESSORIES 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...

Page 4: ... 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 OB36...

Page 5: ...city 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 5 Outdoor Dry bulb temperature 7 Wet bulb temperature 6 Indoor Outdoor piping length 5m Indoor model Function Power supply Air flow High Med Low Breaker capacity Running ...

Page 6: ... 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 Heating Dry bulb temperature 20 Wet bulb temperature 15 5 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 co...

Page 7: ...allation 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 MSH GA50 60VB for MSH GA80VB Power supply cord Lead to right 2 0m Lead to left 1 0m MSH GA50VB MSH GA60VB MSH GA80VB Unit mm OB367D 1 qxp 12 1 13 7 49 AM Page 7 OB367D ...

Page 8: ...T CONNECTING 12V 1 2 3 4 5 6 CIRCUIT BREAKER POWER SUPPLY CORD N 230V 50Hz 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 C BOARD REMOTE CONTROLLER 3 3 TAB12 TB PE CIRC...

Page 9: ...rigerant flow in heating MSH GA50VB 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 MSH GA60VB Indoor heat exchanger Room temperature thermistor RT11 Refrigerant pipe 15 88 with heat insulator Flared connection Flared connection Indo...

Page 10: ... second It takes 3 minutes for the compressor to start operation However the starting time is shortened by short circuit of JPG and JPS 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 MSH GA50VB MSH GA60VB MSH GA80VB How to set the remote controller exclusively for particular indoor unit Aft...

Page 11: ...wer 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 the special counter measures are r...

Page 12: ...g ON and OFF to indicate an abnormality To make sure check how many times the OPERATION INDICATOR lamp is flashing ON and OFF before starting ser vice work 2 Before servicing check that the connector and terminal are connected properly 3 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discolouration 4 W...

Page 13: ...tdoor unit Trouble of thermistor in outdoor unit 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer to 9 5 D How to check mis wiring When outdoor unit does not work Check room temperature thermistor and indoor coil thermis tor Refer to 9 6 Test point diagram and voltage Refer to 9 5 A Check of indoor fan motor Refer to Check of outdoor thermistor Replace the deicer P C board 1...

Page 14: ...er to 9 5 D How to check mis wiring 3 Indoor fan motor MUH GA80VB Low discharge temperature protection MUH GA80VB Discharge temperature has been 50 or less on cool operation or has been 49 or less on heat operation for 20 minutes 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 ...

Page 15: ...ure 10 C 30 C Color of lead wire BRN YLW YLW GRY Normal 4 5 5 5V Measure the voltage power ON When fan revolved one time 0V 5V 0V Approx Normal 282 306 Measure the resistance between the terminal with a tester Part temperature 10 C 30 C BLK RED WHT GRY YLW BRN MAIN AUX FUSE BLK RED WHT GRY YLW BRN MSH GA80VB 132 144 152 166 Normal MSH GA50 GA60VB MSH GA80VB Measure the resistance with a tester Par...

Page 16: ...voltage approximately 4 VDC 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 Is LCD display on the remote con troller visible Remove the batteries then set them back and press the RESET button Check if the unit operates with the remote c...

Page 17: ... 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 Does the unit operate with the remote controller Does the OPERATION INDICATOR lamp light up by pressing the EMERGENCY OPERATION switch Yes No Turn OFF the power supply Turn OFF the power supply Varistor NR11 Indoor electronic control ...

Page 18: ...Replace 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 J205 J101 MUH GA50VB J101 J401 MUH GA60 GA80VB...

Page 19: ...n switch 12 VDC Indoor coil thermistor RT12 main RT13 sub Room temperature thermistor RT11 Resistance k Room temperature ther mistor RT11 To disable Auto restart function solder the jumper wire to JR07 Refer to 8 3 MSH GA80VB Indoor coil thermistor RT13 sub R132 Receiver P C board CN301 w There are 2 types of electronic control P C boards TYPE1 TYPE2 They are both compatible with MSH GA50 60 80VB ...

Page 20: ...supply input 230 VAC Indoor coil thermistor RT12 main MSH GA80VB Indoor coil thermistor RT13 sub Timer short mode point JPS JPG Refer to 8 1 Room temperature thermistor RT11 R132 To disable Auto restart function solder the jumper wire to JR07 Refer to 8 3 Indoor coil thermistor RT12 main RT13 sub Room temperature thermistor RT11 Receiver P C board CN301 TYPE 2 OB367D 1 qxp 12 1 13 7 49 AM Page 20 ...

Page 21: ...w caps of the front panel 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 earth wire Screws Screw of the electrical cover R L holder Screw of the terminal block Receiver P C board 2 Removing the electronic con...

Page 22: ...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 cut ...

Page 23: ... Including No 4 5 6 4PCS SET 3PCS SET 1PCE 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 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 10 11 12 1 1...

Page 24: ...OR COIL THERMISTOR Symbol in Wiring Diagram Q ty unit T3 15AL250V RIGHT LEFT UP DOWN Remarks Part No NO Part Name F11 NR11 MF MF MV2 MV1 RT11 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 E02 528 034 E02 529 034 VANE MOTOR SUPPORT SET RIGHT VANE MOTOR SUPPORT SET LEFT MSH GA50 VB E1 MSH GA60 VB ...

Page 25: ... 6 4PCS SET 3PCS SET 1PCE SET Remarks Part No NO Part Name 1 2 3 4 5 6 7 8 9 RoHS G G G G G G G G G 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 12 2 INDOOR UNIT HEAT EXCHANGER 2 4 5 7 6 1 10 8 11 12 3 E12 891 620 E12 893 620 E12 179 667 E12 138 666 E12 151 667 E12 527 667 INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER UNION GAS UNION GAS UNION LIQUID UNION LIQUID 12 7 15 88 6 35 9 52 10 11 ...

Page 26: ...G G G G G G G G G G G G G G G G G G G G G G G G G G RoHS Part Name F11 NR11 MF MF MV2 MV1 RT11 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 MSH GA50 VB E1 MSH GA60 VB E1 MSH GA80 VB E1 AUTO RESTART Including No 16 AUTO RESTART Including No 16 AUTO RESTART Including No 16 RC4V40 Including RUBBER...

Page 27: ...s 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 MSH GA50VB MSH GA60VB MSH GA80VB OPTIONAL PARTS OB367D 1 qxp 12 1 13 7 49 AM Page 27 OB367D ...

Page 28: ...n Jan 2012 No OB367 REVISED EDITION D Distributed in Aug 2011 No OB367 REVISED EDITION C Distributed in May 2007 No OB367 REVISED EDITION B 6 Distributed in May 2006 No OB367 REVISED EDITION A 6 Distributed in Oct 2004 No OB367 6 Made in Japan HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN OB367D 1 qxp 12 1 13 7 49 AM Page 28 ...

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