Mitsubishi Electric MSH-GD80VB-E1 Service Manual Download Page 23

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}

Resistance(k

)

{

Fan motor power supply
(CN211)

Fuse (F11)
T3.15AL250V

230 V AC

5 VDC

Indoor coil
thermistor (RT12 (main))

Indoor coil
thermistor (RT13 (sub))

Timer short
mode point
(JPS, JPG)
(Refer to 8-1.)

Emergency
operation
switch

CN121

Room temperature
thermistor (RT11)

R132

To disable “Auto restart
function”, solder jumper
wire to JR07.
(Refer to 8-3.)

Vane motor
power supply
(CN151)

12 VDC

Indoor coil thermistor (RT12 (main), RT13 (sub))
Room temperature thermistor (RT11)

Power supply input

CN301

MSH-GD80VB

Indoor electronic control P.C. board

Receiver P.C. board

TYPE 2

OBH513A

Summary of Contents for MSH-GD80VB-E1

Page 1: ...1 DISASSEMBLY INSTRUCTIONS 24 MSH GD80VB E1 SPLIT TYPE AIR CONDITIONERS SERVICE MANUAL Wireless type Model INDOOR UNIT NOTE RoHS compliant products have G mark on the spec name plate Outdoor unit service manual MUH GD VB Series OBH514 No OBH513 REVISED EDITION A PARTS CATALOG OBB513 Revision A Another type of the electronic control P C board TYPE 2 has been added to the original one TYPE 1 They ar...

Page 2: ... for 3 5 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 MSH GD80VB 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 sp...

Page 3: ...d regulator Remote controller model Fan motor Electrical data Special remarks Cooling Heating Single phase 230 V 50 Hz 954 822 684 0 34 69 88 0 34 RC4V40 AA 1 100 325 258 16 5 47 42 37 1 280 1 130 970 954 834 726 1 280 1 150 1 020 3 KM04A h A Breaker capacity 10 A W A mm kg dB rpm MSH GD80VB NOISE CRITERIA CURVES 4 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 OCTAVE BAND SOUND PRESSU...

Page 4: ...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 9 52 0 5 m Gas line 12 0 43 m Insulation 50 O D 32 I D Power supply cord Lead to right 2 0 m Lead to left 1 0 m MSH GD80VB Unit mm OBH513A ...

Page 5: ... 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 5 WIRING DIAGRAM 6 MSH GD80VB REFRIGERANT SYSTEM DIAGRAM 7 Refrigerant flow in cooling Refrigerant flow in heating Unit mm MSH GD80VB OBH513A ...

Page 6: ...ned 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 short ened 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 GD80VB How to set the remote controller ex...

Page 7: ... 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 required to prevent the main voltage dr...

Page 8: ...of the indicator Lighted Not lighted MSH GD80VB HEAT ON OFF FAN TOO WARM TOO COOL VANE MODE ECONO COOL STOP START HR MIN WIDE VANE LONG I FEEL COOL DRY PM CLOCK AM RESET CLOCK 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 ...

Page 9: ...er rises or the fixed time passes When the compressor is not operating or is starting and the temperature of indoor heat exchanger and or the room temperature is low or when defrosting is being done the indoor fan will stop or rotate in Very Low speed Cold air prevention control However when the coil frost prevention works while the compressor is not operating the indoor fan speed becomes Low Mode...

Page 10: ...10 OBH513A ...

Page 11: ...VANE OPERATION The horizontal vane position is set to Upward To confirm the standard position the vane moves until it touches the vane stopper Then the vane is set to the desired angle in the following case OBH513A ...

Page 12: ...ditioner can keep comfort As a result energy can be saved To cancel this operation select a different mode or press one of the following buttons in ECONO COOL operation ECONO COOL VANE or LONG button To cancel this operation press one of the following buttons ECONO COOL button in COOL mode VANE or LONG button To confirm the standard position the vane moves until it touches the vane stopper Then th...

Page 13: ...13 9 6 TIMER OPERATION OBH513A ...

Page 14: ...indoor fan runs at High speed and the temperature control does not work 9 8 3 MINUTE TIME DELAY OPERATION When the system turns OFF compressor will not restart for 3 minutes as 3 minute time delay function operates to protect compressor form overload OBH513A ...

Page 15: ...R lamp on the indoor unit is flashing 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 serv ice 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...

Page 16: ... in outdoor unit 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer to 10 5 How to check mis wiring When outdoor unit does not work Check room temperature thermistor and indoor coil thermis tor Refer to 10 6 Test point diagram and voltage Refer to 10 5 Check of indoor fan motor Refer to Check of outdoor thermistor Replace the deicer P C board 10 time flash Cause Outdoor unit T...

Page 17: ...to the characteristics of indoor coil thermistor and room temperature thermistor on 10 6 3 time flash 2 5 second OFF Indoor fan repeats 12 seconds ON and 3minutes OFF When the indoor fan breaks the fan keeps stopping The rotational frequency feedback signal is not emitted for 12 seconds after indoor fan motor is operated Refer to 10 5 How to check mis wiring Refer to 10 5 Check of indoor fan motor...

Page 18: ...10 C 30 C Color of lead wire BRN YLW YLW GRY Normal 4 5 5 5 V Measure the voltage power ON When fan revolved one time 0 V 5 V 0 V Approx Normal 282 Ω 306 Ω Measure the resistance between the terminal with a tester Part temperature 10 C 30 C BLK RED WHT GRY YLW BRN 132 Ω 144 Ω 152 Ω 166 Ω Normal Measure the resistance with a tester Part temperature 10 C 30 C Refer to 10 6 Test point diagram and vol...

Page 19: ...hers 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 controller Yes Does the unit operate with the remote controller Yes OK Yes No No No 5 V or 0 V DC No Resolder it Reconnect the lead wires Repair or replace the indoor fan motor Replace the remote controller Reinstall the u...

Page 20: ... varistor Yes Turn OFF 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 Indo...

Page 21: ...d 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 5 V DC between J101 J401 on the deicer P C board Yes Yes After 3 minutes mis wiring is indicated 0 5 second ON 0 5 second OFF on OPERATION INDICATOR lamp on indoor unit Short circuit of JPG and JPS on the indoor electronic control P C board enables self check ...

Page 22: ...mergency operation switch 12V DC Indoor coil thermistor RT12 main RT13 sub Room temperature thermistor RT11 Resistance kΩ Room temperature thermistor RT11 To disable Auto restart function solder jumper wire to JR07 Refer to 8 3 Indoor coil thermistor RT13 sub R132 Receiver P C board TYPE 1 Vane moter power supply CN151 CN121 CN301 NOTE There are two types of electronic control P C boards TYPE 1 TY...

Page 23: ...G Refer to 8 1 Emergency operation switch CN121 Room temperature thermistor RT11 R132 To disable Auto restart function solder jumper wire to JR07 Refer to 8 3 Vane motor power supply CN151 12 VDC Indoor coil thermistor RT12 main RT13 sub Room temperature thermistor RT11 Power supply input CN301 MSH GD80VB Indoor electronic control P C board Receiver P C board TYPE 2 OBH513A ...

Page 24: ...terminal block 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 panel and the corner box Refer to 1 2 Remove the screw of the electrical cover Remove the electrical cover 3 Remove the screws of the V A clamp Remove the V A clamp 4 Remove the screw of the terminal block 5 Remove the screws of the earth wire 6 Disconnect all...

Page 25: ...o 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 5 Slide the hole cover and remove the hole cover 6 Remove the hexagon socket set screw from the line flow fan 7 Remove the screws of the fan motor and remove the fan motor Be careful not to drop the fan motor because it is heavy 8 Remove the screws of ...

Page 26: ...bject to change without notice Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Aug 2011 No OB REVISED EDITION A Distributed in Apr 2008 No OBH513 6 Made in Japan HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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