Mitsubishi Electric MSZ-GA50VA Service Manual Download Page 32

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New publication, effective Jun. 2006
Specifications subject to change without notice.

Distributed in Jun. 2006. No.OB419 REVISED EDITION-A 6
Distributed in Jun. 2005. No.OB419 6
Made in Japan

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

OB419A.qxp 06.6.5 11:09 AM Page 32

Summary of Contents for MSZ-GA50VA

Page 1: ... GA60VA MSZ GA71VA MSZ GA80VA A1 A1 A1 A1 SPLIT TYPE HEAT PUMP AIR CONDITIONERS Outdoor unit service manual MUZ GA VA series OB442 MXZ A VA series OB447 MXZ 8A140VA1 OC316 INDOOR UNIT No OB419 REVISED EDITION A Revision A MSZ GA80VA has been added 9 2 Failure mode recall function has been changed RoHS PARTS LIST has been added A1 Please void OB419 NOTE This service manual describes technical data ...

Page 2: ...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 Revision A MSZ GA80VA model has been added 9 2 Failure mode recall function has been changed RoHS PARTS LIST has been added A1 ...

Page 3: ...anes Air cleaning filter Anti allergy enzyme filter blue bellows type Catechin air filter Remote control receiving section MSZ GA50VA MSZ GA60VA MSZ GA71VA MSZ GA80VA 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 l...

Page 4: ... 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 ...

Page 5: ...tions are based on AS NZS 3823 1 1 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 C Outdoor Dry bulb temperature 35 C Wet bulb temperature 24 C Heating Indoor Dry bulb temperature 20 C Wet bulb temperature 15 5 C Outdoor Dry bulb temperature 7 C Wet bulb temperature 6 C Indoor Outdoor piping length 5m 1 Measured under rated operating frequency Indoor model Function Power supply A...

Page 6: ...GA50VA MSZ GA60VA MSZ GA71VA MSZ GA80VA Fuse Vane motor Varistor Terminal block F11 MV1 MV2 NR11 TB T3 15AL 250V MP20 MP20 ERZV14D471 4P Specifications and rating conditions of main electric parts 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 OCTAVE BAND SOUND PRESSURE LEVEL 0dB 20µPa BAND CENTER FREQUENCIES Hz APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40...

Page 7: ...n 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 GA71 80VA MSZ GA50VA MSZ GA60VA MSZ GA71VA MSZ GA80VA Unit mm ...

Page 8: ...BOARD BLU 230V 3 POWER MONITOR P C BOARD S2 REMOTE CONTROLLER SYMBOL RT13 T111 TB SYMBOL MV2 NR11 RT11 RT12 SYMBOL DB111 F11 MF MV1 DIODE STACK FUSE 3 15A INDOOR FAN MOTOR VANE MOTOR HORIZONTAL VANE MOTOR VERTICAL VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR MAIN INDOOR COIL THERMISTOR SUB TRANSFORMER TERMINAL BLOCK NAME NAME NAME 1 About the outdoor side electric wiring refer to th...

Page 9: ...low in heating MSZ GA50VA Indoor heat exchanger Room temperature thermistor RT11 Refrigerant pipe 12 7 with heat insulator Flared connection Flared connection Indoor coil thermistor RT12 main Refrigerant pipe 6 35 with heat insulator Distributor MSZ GA60VA Indoor heat exchanger Room temperature thermistor RT11 Refrigerant pipe 15 88 with heat insulator Flared connection Flared connection Indoor co...

Page 10: ...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 The P C board has the print J1 and J2 Solder J1 and J2 according to the number...

Page 11: ...ot 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 the special count...

Page 12: ...troller malfunction In this case replace the batteries to operate the remote controller normally 1 Remove the front lid and insert batteries Then reattach the front lid Lead wiring Housing point NOTE If the RESET button is not pressed the remote controller may not operate correctly MSZ GA50VA MSZ GA60VA MSZ GA71VA MSZ GA80VA 2 Press the RESET button with tip end of ball point pen or the like and t...

Page 13: ...PERATION 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 after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds Deleting the abnormal memorized condition 1After repairing the unit recall the failure mode again according t...

Page 14: ...efer to the characteristics of the main indoor coil thermistor the sub indoor coil thermistor 9 7 Indoor coil thermistor When the indoor coil thermistor short or open circuit is detected every 8 seconds during operation 3 time flash 2 5 second OFF Refer to 9 6 D How to check mis wiring and serial signal error Serial signal When the serial signal from the outdoor unit is not received for a maximum ...

Page 15: ...mistor Left lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor 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 Refer to 9 6 D How to check mis wiring and serial signal error Check room temperature thermis...

Page 16: ... second OFF When rotational frequency feedback signal is not emit during indoor fan operation Refer to 9 6 A Check of indoor fan motor Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Left lamp flashes 5 time flash 2 5 second OFF Left lamp flashes 6 time flash 2 5 second OFF Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not opera...

Page 17: ...N INDICATOR lamp right hand side lamp indicates abnormality OPERATION INDICATOR lamp left hand side lamp is lighted 9 5 Trouble criterion of main parts MSZ GA50VA MSZ GA60VA MSZ GA71VA MSZ GA80VA Part name Figure Check method and criterion Indoor fan motor MF Measure the resistance with a tester Refer to 9 7 Test point diagram and voltage Indoor electronic control P C board the chart of thermistor...

Page 18: ...2 seconds after EMERGENCY OPERATION switch is pressed If more than 12 seconds passes by turn OFF the power supply and turn ON it again then measure the voltage w 1 Measure the voltage between CN211 1 and 3 2 Measure the voltage between CN211 5 and 3 Is there 325V DC between CN211 1 and 3 and does the voltage between CN211 5 and 3 rise to the range of 3 to 6V DC within 12 seconds after EMERGENCY OP...

Page 19: ... 1m Replace the remote controller Reinstall the unit away from lights Attach a filter on receiving part Switch ON the remote controller Is LCD display on the the remote controller visible Remove the batteries then set them back and press RESET button Refer to 9 1 4 Check if the unit operates with the remote controller Yes Does the unit operate with the remote controller Yes OK No not clear Yes No ...

Page 20: ...3 and 4 of the indoor fan motor connector Short open circuit Replace the indoor fan motor Short open circuit Replace the horizontal vane motor and the indoor electronic control P C board Turn OFF the power supply Check both parts side and pattern side of the indoor electronic control P C board visually Replace the varistor NR11 and fuse F11 Are the varistor NR11 burnt and the fuse F11 blown Be sur...

Page 21: ... terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3 Confirmation of serial signal Is there rated voltage between indoor terminal block S1 and S2 Confirmation of power voltage Replace the indoor electronic control P C board Replace the inverter P C board or the outdoor electronic control P C board W2 Is there any error of th...

Page 22: ...nit of the air conditioner 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...

Page 23: ... to JR07 Refer to 8 3 230V AC Fuse F11 Indoor coil thermistor RT12 MAIN RT13 SUB Horizontal vane motor CN151 9 7 Test point diagram and voltage SW P C board Receiver P C board 12V DC 5V DC 5 3 6V DC 415V DC 3 Fiducial terminal of cathode side on measur ing high voltage DC 1325V DC Power supply input Indoor fan motor CN211 Varistor NR11 Room temperature thermistor RT11 Timer short mode point JPG JP...

Page 24: ...move 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 cable clamp Indoor electronic control P C board Vane motor connector Fan motor connector Screws Screw of the electrical cover R L holder Receiver P C board 2 Removing the electronic control P C board the receiver P C board and the display P C board 1 Remove the fro...

Page 25: ...se from the 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 of the motor bed 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 wa...

Page 26: ... Wiring Diagram Q ty unit Including No 4 5 6 4PCS SET 3PCS SET MAC 2300FT Remarks Part No No Part Name 1 2 3 4 5 6 7 8 9 10 1 1 1 4 3 1 2 1 2 1 1 1 1 4 3 1 2 1 2 1 1 1 1 4 3 1 2 1 2 1 11 2 INDOOR UNIT HEAT EXCHANGER 2 4 5 7 6 1 11 8 12 13 3 E02 851 620 E02 819 620 E02 179 667 E02 527 666 E02 151 667 E02 527 667 INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER UNION GAS UNION GAS UNION LIQUID UNION LIQU...

Page 27: ...IL THERMISTOR 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 MV2 MV1 RT11 TB RT12 RT13 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 RC0J56 AUTO RESTART AUTO RESTART AUTO RESTART 60VA A1 50VA A...

Page 28: ...ic electricity Normal life of AIR CLEANING FILTER is 1 year If AIR CLEANING FILTER is to be washed soak AIR CLEANING FILTER in water when showing dirt in lukewarm water and rinse it delicately without removing the filter from the frame about once every 3 months Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet Do not remove or attach AIR CLEANING ...

Page 29: ...nit Including No 4 5 6 4PCS SET 3PCS SET MAC 2300FT Remarks Part No No Part Name 1 2 3 4 5 6 7 8 9 10 G G G G G G G G G G 1 1 1 4 3 1 2 1 2 1 1 1 1 4 3 1 2 1 2 1 1 1 1 4 3 1 2 1 2 1 1 1 1 4 3 1 2 1 2 1 RoHS 12 2 INDOOR UNIT HEAT EXCHANGER 2 4 5 7 6 1 11 8 12 13 3 E12 851 620 E12 819 620 E12 179 667 E12 527 666 E12 151 667 E12 527 667 INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER UNION GAS UNION GAS ...

Page 30: ...NDOOR COIL THERMISTOR INDOOR COIL THERMISTOR 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 MV2 MV1 RT11 TB RT12 RT13 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 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1...

Page 31: ... static electricity Normal life of AIR CLEANING FILTER is 1 year If AIR CLEANING FILTER is to be washed soak AIR CLEANING FILTER in water when showing dirt in lukewarm water and rinse it delicately without removing the filter from the frame about once every 3 months Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet Do not remove or attach AIR CLEA...

Page 32: ...t to change without notice C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Jun 2006 No OB419 REVISED EDITION A 6 Distributed in Jun 2005 No OB419 6 Made in Japan HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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