Mitsubishi Electric MS-GD08ND Service Manual Download Page 2

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TECHNICAL CHANGES

MS-A08ND-

➔

MS-GD08ND-

MS-A12ND-

➔

MS-GD12ND-

1. Indoor unit has been changed.

• Front panel has been changed. (Flat Flat Shining)

2. Terminal block has been changed. 3P (L~, N~, 2~) 4P (L~, N~, 2~, Earth)

MS-A10ND-

➔

MS-GD10ND-

1. Indoor unit has been changed.

• Front panel has been changed. (Flat Flat Shining)

Summary of Contents for MS-GD08ND

Page 1: ...GRAM 7 7 SERVICE FUNCTIONS 8 8 TROUBLESHOOTING 10 9 DISASSEMBLY INSTRUCTIONS 19 Wireless type Models INDOOR UNIT Outdoor unit service manual MU GD ND Series TBH016 SPLIT TYPE AIR CONDITIONERS MS GD08ND C1 MS GD10ND C1 MS GD12ND C1 PARTS CATALOG TBB014 No TBH014 NOTE RoHS compliant products have G mark on the spec name plate TM MS GD08ND MS GD10ND MS GD12ND C1 C1 C1 ...

Page 2: ...D C1 MS GD12ND C1 1 Indoor unit has been changed Front panel has been changed Flat Flat Shining 2 Terminal block has been changed 3P L N 2 4P L N 2 Earth MS A10ND C1 MS GD10ND C1 1 Indoor unit has been changed Front panel has been changed Flat Flat Shining ...

Page 3: ...ing Front panel Panel Horizontal vane Operation section When the front panel is opened Remote controller Operation indicator lamp Remote control receiving section MS GD08ND C1 MS GD10ND C1 MS GD12ND C1 1 Installation plate 1 2 Installation plate fixing screw 4 x 25 mm 5 3 Remote controller holder 1 4 Fixing screw for 3 3 5 x 16 mm Black 2 5 Battery AAA for remote controller 2 6 Wireless remote con...

Page 4: ... 60Hz Capacity Air flow High Med Low K h 588 456 372 630 498 336 666 498 336 Electrical data Power outlet A 10 Running current A 0 19 Power input W 40 Auxiliary heater A kW Power factor 96 92 Fan motor current A 0 19 Fan motor Model RC4N19 BA Winding resistance at 20ºC WHT BLK 312 BLK RED 255 Dimensions WoHoD mm 815o278o244 Weight kg 9 10 Special remarks Air direction 5 Sound level High Med Low dB...

Page 5: ...ll hole 65 Indoor unit Installation plate 57 0 4 1 17 5 Air in 244 242 5 8 1 2 8 5 2 81 5 81 5 1 4 2 4 5 2 5 7 1 161 5 161 5 326 326 5 e r o m r o 7 90 110 0 3 149 606 8 7 2 60 815 783 Air out Indoor unit Installation plate Wall hole 65 Installation plate Insulation 28 Drain hose 16 Connected part O D Air in Liquid line 6 35 0 5m Gas line Insulation 37 O D 21 I D Wireless remote controller 57 0 4 ...

Page 6: ...6 MS GD08ND C1 MS GD12ND C1 WIRING DIAGRAM 5 INDOOR UNIT MS GD10ND C1 ...

Page 7: ... 35 with heat insulator Flared connection Flared connection Refrigerant pipe Option 12 7 with heat insulator Refrigerant flow in cooling Room temperature thermistor Indoor heat exchanger RT11 Indoor coil thermistor RT12 Refrigerant pipe Option 6 35 with heat insulator Flared connection Flared connection Refrigerant pipe Option 9 52 with heat insulator MS GD12ND C1 INDOOR UNIT ...

Page 8: ...ort circuit of JPG and JPS the electronic control P C board The time will be shortened as follows Refer to 8 6 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 How to modify the remote controller P C board Remove batteries before modification The board has a print as...

Page 9: ...er If the main power is turned off or a power failure occurs while AUTO START STOP timer is active the timer setting is cancelled If the unit has been off with the remote controller before power failure the auto restart 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 ...

Page 10: ...es the abnormality indication is flashing on and off before starting service work 2 Before servicing 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 discolouration 4 When troubleshooting refer to 8 2 and 8 3 4 How to replace batteries Weak bat...

Page 11: ...stalled correctly both of the operation indicator lamps will flash In this case install the horizontal vanes correctly by following the procedures 1 to 6 NOTE Before installation of the horizontal vanes disconnect the power supply plug and or turn off the breaker 5 How to install the horizontal vanes If horizontal vanes are not installed correctly both of the operation indicator lamps will flash I...

Page 12: ... Left lamp 2 time flash Cause Indoor unit Trouble of room temperature indoor coil thermistor Left lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor Check room temperature thermistor and indoor coil thermistor Refer to 8 6 Test point diagram and voltage Refer to 8 5 A Check of indoor fan motor 1 Check indoor outdoor connecting wire 2 Refer to 8 5 C Check of indoor electronic control P...

Page 13: ...When the indoor fan motor breaks the fan keeps stopping When rotational frequency feedback signal is not emitting during 12 second indoor fan operation Refer to 8 5 A Check of indoor fan motor Outdoor unit does not operate Left lamp flashes Left lamp flashes Indoor control system 4 time flash 2 5 second OFF Left lamp flashes 4 Replace the indoor electronic control P C board Outdoor unit does not o...

Page 14: ...sure the resistance with a tester Part temperature 10 C 30 C Figure Normal 8k 20k Abnormal Open or short circuit Measure the resistance between the terminals with a tester Coil wiring temperature10 C 30 C Indoor fan motor MF INNER FUSE 145i 2 CUT OFF t r a p r o t o M t r a p r o s n e S Measure the voltage Power ON MAIN AUX BLK RED WHT FUSE Normal 299 324 WHT BLK BLK RED Color of lead wire BRN YL...

Page 15: ... operates with remote controller Yes Does the unit operate with remote controller Yes OK No not clear Yes No No No 5V or 0V DC No A Check of indoor fan motor Turn OFF the power supply Check connector CN211 visually Disconnect lead wires from connector CN211 on the indoor electronic control P C board Measure resistance between lead wires No 1 and No 5 and then No 3 and No 5 Are lead wires connected...

Page 16: ... Replace the vane motor No Yes Yes Is varistor NR11 burnt Replace the 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 No Does the unit operate with the remote controller Does the OPERATION INDICATOR lamp light up by pressing the EMERGENCY OPERATION switch Yes N...

Page 17: ...er of the horizontal vane to the indoor unit Refer to 8 1 5 Yes Is the OPERATION INDICATOR lamp flashing Yes No No OK Turn ON the power supply To check the continuity of safety device measure the resistance of connector 1 3 connected to CN1R1 on the indoor electronic control P C board Turn OFF the power supply Turn OFF the power supply When both OPERATION INDICATOR lamps flash ON and OFF every 0 5...

Page 18: ...supply input 220 230V AC Varistor NR11 Fuse 250V AC 3 15A Room temperature thermistor RT11 Indoor coil thermistor RT12 Timer short mode point JPG JPS Refer to 7 1 Emergency operation switch Indoor fan motor 220 230V AC 5V DC 12V DC J23 J33 J33 J12 8 6 Test point diagram and voltage Safety device of fan by horizontal vane CN1R1 Varistor NR12 Indoor electronic control P C board MS GD08ND C1 MS GD10N...

Page 19: ...ndoor electronic control P C board slightly 10 Disconnect all except CN125 CN109 the connectors on the electronic control P C board 11 Remove the electronic control P C board 12 Disconnect the connector of power monitor receiver P C board CN 125 CN109 on the electronic control P C board Terminal block fixing screw Screw of the V A clamp Indoor electronic control P C board Screw of the ground wire ...

Page 20: ...nel Refer to 1 2 Remove the electrical cover Refer to 2 3 Remove the V A clamp Refer to 2 4 Remove the cord clamp Refer to 2 5 Remove the terminal block Refer to 2 6 Remove the screw of ground wire Refer to 2 7 Disconnect the connector of the indoor coil thermistor CN112 the fan motor connector CN211 and CN121 and the vane motor connector CN151 on the electronic control P C board 8 Remove the fan ...

Page 21: ...0 JAPAN MITSUBISHI ELECTRIC CONSUMER PRODUCTS THAILAND CO LTD AMATA NAKORN INDUSTRIAL ESTATE 700 406 MOO 7 TAMBON DON HUA ROH AMPHUR MUANG CHONBURI 20000 THAILAND Made in Thailand New publication effective Feb 2008 Specifications subject to change without notice TM ...

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