Mitsubishi Electric MS-A08ND Service Manual Download Page 1

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SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ····································2

2. PART NAMES AND FUNCTIONS······················3

3. SPECIFICATION·················································4

4. OUTLINES AND DIMENSIONS ·························5

5. WIRING DIAGRAM ············································6

6. REFRIGERANT SYSTEM DIAGRAM ················6

7. SERVICE FUNCTIONS ······································7

8. TROUBLESHOOTING········································9

9. DISASSEMBLY INSTRUCTIONS ····················18

10. PARTS LIST······················································20

Wireless type
Models

SPLIT-TYPE, AIR CONDITIONERS

MS-A08VD-

MS-A10VD-

MS-A13VD-

No. OB396

Indication of model name

MS-A08VD -
MS-A10VD -
MS-A13VD -

NOTE:

• This service manual describes technical data of indoor units.
• As for outdoor units MU-A08VD -

,MU-A10VD -

and MU-A13VD -

, refer to the service manual OB397.

OB396--1.qxp 05.3.18 8:59 AM Page 1

Summary of Contents for MS-A08ND

Page 1: ...NS 7 8 TROUBLESHOOTING 9 9 DISASSEMBLY INSTRUCTIONS 18 10 PARTS LIST 20 Wireless type Models SPLIT TYPE AIR CONDITIONERS MS A08VD MS A10VD MS A13VD P1 P1 P1 TM No OB396 Indication of model name MS A08VD MS A10VD MS A13VD P1 P1 P1 NOTE This service manual describes technical data of indoor units As for outdoor units MU A08VD MU A10VD and MU A13VD refer to the service manual OB397 P1 P1 P1 ...

Page 2: ...278Ho191D 815Wo278Ho244D 2 Easy clean function has been added 3 Catechin air filter has been added 4 Air cleaning filter has been added 5 Fan motor has been changed 6 Fan motor capacitor has been changed 7 P C board has been changed 8 Fin pattern of cooler has been changed 9 Remote controller has been changed OPERATE STOP ON OFF button and TEMPERATURE buttons have been remodeled to be luminous ...

Page 3: ...MS A08VD P1 P1 MS A13VD P1 ACCESSORIES PART NAMES AND FUNCTIONS 2 INDOOR UNIT MS A08VD MS A10VD MS A13VD P1 P1 P1 Emergency operation switch Fan Air outlet Vertical vanes Air inlet to Breaker Remote control receiving section Display section Air cleaning filter white bellows type Catechin air filter with deodorizing Front panel Power supply cord Panel Horizontal vane Operation section When the fron...

Page 4: ...50w Cooling Single phase 220 230 240V 50Hz 10 815O278O244 5 3 10 10 MP04B MS A08VD P1 MS A10VD P1 MS A13VD P1 NOTE Test conditions are based on JIS C 9612 Cooling Indoor DB27 C WB19 C Outdoor DB35 C WB24 C Indoor Outdoor piping length 5 m W Reference value REMOTE CONTROLLER MS A08VD MS A10VD MS A13VD P1 P1 P1 ON OFF RESET TOO WARM TOO COOL ECONO COOL POWERFULCOOL SELECT FAN VANE TIME MODE I FEEL C...

Page 5: ...troller 81 5 81 5 41 2 5 42 271 231 5 4 5 81 5 133 5 326 326 Wall hole 65 Indoor unit Installation plate 57 140 17 5 Air in MS A13VD P1 INDOOR UNIT 244 242 218 5 258 81 5 81 5 41 42 2 5 17 5 161 5 161 5 326 326 5 7 or more 90 110 30 149 606 278 60 815 783 Power supply cord Lead to right 1 0m Lead to left 0 3m Air out Indoor unit Installation plate Wall hole 65 Installation plate Insulation 28 Drai...

Page 6: ...0 240V N 50Hz LD103 F12 BLU BLU 2 1 BLU 220 230 240V 5 MV 151 CN TO OUTDOOR UNIT CONNECTING BRN L N TB 2 BLU WHT POWER MONITOR RECEIVER P C BOARD REMOTE CONTROLLER 2 109 CN 2 SAFETY DEVICE FAN 1R1 CN CN 125 CN201 3 2 1 ELECTRONIC CONTROL P C BOARD 3 T11 RED WHT NR11 SR141 F11 C11 111 CN CN 112 3 121 CN CN211 6 5 BRN YLW GRY BLK 4 3 2 1 MF RT11 RT12 1 3 5 52C 3 4 SYMBOL SR141 TB T11 52C SYMBOL MV N...

Page 7: ...ime 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 shown below NOTE For remodelling take out the bat teries and push the OPERATE STOP ON OFF button twice or 3 times a...

Page 8: ... 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 on at the same time When some air conditioners are connected to the same supp...

Page 9: ... 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 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 ...

Page 10: ...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 Upper vane Lower vane The holes on the insertion ends of the upper and lower horizontal vanes have different shapes Insert this end first Upper right Lowe...

Page 11: ...r unit Trouble of room temperature indoor coil thermistor Check room temperature thermistor and indoor coil thermistor Refer to 8 6 Test point diagram and voltage Left lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor 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 C board Check of wiring diagram of...

Page 12: ... 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 operate When it cannot properly r...

Page 13: ...e 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 Motor part Sensor part Measure the voltage Power ON MAIN AUX BLK RED WHT FUSE Normal 215 233 WHT BLK MS A13VD BLK RED Color of lead wire BRN YLW YLW GRY Normal 4 5 5 5V Abnormal Remain 0V or 5V When...

Page 14: ... operates with remote con troller Yes Does the unit operate with remote controller Yes OK No not clear Yes No No No 5V or 0V DC No A 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 connec...

Page 15: ... 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 1 Pull out the power supply cord 2 Measure the resistance between CN201 1 on the indoor electronic control P C board and N on the terminal block w...

Page 16: ...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 17: ...o the JR07 Refer to 7 3 CN302 Power monitor receiver P C board Power supply input 220 230 240V 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 220 230 240V AC 5V DC 12V DC J23 J33 J33 J12 8 6 Test point diagram and voltage Safety device of fan by horizontal vane ...

Page 18: ... C board and the power monitor receiver P C board NOTE In case of removing only indoor electronic control P C board work 3 is not necessary 1 Remove the panel Refer to 1 2 Remove the power monitor receiver P C board holder from the bottom of electrical box 3 Open the power monitor receiver P C board holder and remove the power monitor receiver P C board 4 Remove the screw of the electrical cover a...

Page 19: ...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 20: ... 11 E02 846 426 E02 527 083 REMOTE CONTROLLER REMOTE CONTROLLER HOLDER 1 1 1 1 1 1 MP04B BOX BOX PANEL ASSEMBLY SCREW CAP FRONT PANEL CATCH CATECHIN AIR FILTER CATECHIN AIR FILTER AIR CLEANING FILTER CORNER BOX RIGHT INSTALLATION PLATE INSTALLATION PLATE 1 1 2 1 2 2 2 1 1 1 1 2 1 2 2 2 1 1 Including No 3 4 5 2PCS SET 2PCS SET 2PCS SET 2PCS SET MAC 1300FT 1 1 2 1 2 2 2 1 1 10 1 INDOOR UNIT STRUCTUR...

Page 21: ...ZZLE ASSEMBLY SAFETY DEVICE VANE UPPER VANE LOWER FUSE VARISTOR VARISTOR VANE CRANK SET POWER MONITOR RECEIVER P C BOARD ELECTRONIC CONTROL P C BOARD ELECTRONIC CONTROL P C BOARD ELECTRONIC CONTROL P C BOARD VANE MOTOR ROOM TEMPERATURE THERMISTOR INDOOR FAN MOTOR RC4V19 INDOOR FAN MOTOR RC4V19 MOTOR BAND TERMINAL BLOCK INDOOR COIL THERMISTOR LINE FLOW FAN BEARING MOUNT BEARING MOUNT THERMAL FUSE 3...

Page 22: ...ecomes 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 P1 P1 P1 MAC 1300FT With frame type MS A08VD MS A10VD MS A13VD NOTE The frame is necessary for the installation of AIR CL...

Page 23: ...23 ...

Page 24: ... 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Mar 2005 No OB396 106 Made in Japan New publication effective Mar 2005 Specifications subject to change without notice TM ...

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