Mitsubishi Electric MSH-XV07UV Service Manual Download Page 47

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How to check mis-wiring and serial signal error

Yes

1. Turn OFF the power supply.
2. Turn ON the power supply.
3. Press the EMERGENCY OPERATION switch.

3 min. later, when contactor(52C) turns ON, what self-check result is
displayed on OPERATION INDICATOR lamp on the indoor unit?

❈

Start

1. Turn OFF the power supply and disconnect in-out connecting wires on the indoor side.

2. Short-circuit between indoor terminal block

and

3. Turn ON the power supply and press the EMERGENCY OPERATION switch.

1. Turn OFF the power supply.
2. Re-connect in-out connecting wires.
3. Turn ON the power supply.

3 minutes later, when the EMERGENCY OPERATION switch
is pressed and contactor(52C) turns ON, is there 220-240V AC

between the outdoor terminal block

❈

Is there 5V DC between J205 - J101 , on the deicer
P.C. board?

❈

2 (Refer to page 50.)

Is there 10V DC between both ends of R601 on
the deicer P.C. board?

❈

2 (Refer to page 50.)

(By tester, the stylus is between 5 ~10V)

Replace the outdoor deicer P.C. board.

Rectify the indoor/outdoor connecting wire.

Check and rectify the fuse and the varistor
on the outdoor deicer P.C. board.

Rectify the indoor/outdoor connecting wire.

Replace the indoor electronic control
P.C. board.

❈

1 Short circuit of JPG and JPS on the

indoor electronic control P.C. board
enables self-check to be displayed in 3
seconds.

Serial signal error is indicated.
(1-sec.ON, 2.5-sec.OFF)

Repair wiring.

Is there mis-wiring, poor contact, or wire disconnection?

Is there 20V DC between both ends of R132 when
contactor(52C) turns ON?
( By tester, the stylus is between 0 ~ 20V. )

–

Yes

Mis-wiring is indicated.(0.5-sec.ON, 0.5-sec.OFF)

❈

2 While the serial signal error is indicated, contactor(52C) alternates ON

for about 10 seconds and OFF for 3 minutes.
Measure the voltage when contactor(52C) is ON.

Outdoor unit doesn’t operate.

When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second or flashes once.
Outdoor unit doesn’t operate.

OB294--2.qxp 02.1.26 1:53 PM Page 47

Summary of Contents for MSH-XV07UV

Page 1: ...M 10 6 REFRIGERANT SYSTEM DIAGRAM 11 7 PERFORMANCE CURVES 13 8 MICROPROCESSOR CONTROL 29 9 SERVICE FUNCTIONS 38 10 TROUBLESHOOTING 40 11 DISASSEMBLY INSTRUCTIONS 51 12 PARTS LIST 55 Wireless type Models MSH XV07UV WH MUH XV07UV MSH XV09UV WH MUH XV09UV MSH XV12UV WH MUH XV12UV E1 E1 E1 E1 E1 E1 No OB294 SPLIT TYPE HEAT PUMP AIR CONDITIONERS ...

Page 2: ......

Page 3: ...Vertical vanes Air inlet Grille Remote control receiving section Remote controller Display section When the grille is opened Operation indicator lamp Receiving section Air cleaning filter White bellows type Emergency operation switch Front panel Air inlet Piping Drain hose Air outlet Drain outlet back and side OUTDOOR UNIT MUH XV07UV MUH XV12UV MUH XV09UV E1 E1 E1 ...

Page 4: ...CT button OPERATE STOP ON OFF button Remote controller holder REMOTE CONTROLLER MSH XV07UV MSH XV12UV MSH XV09UV E1 E1 E1 1 5 1 2 2 1 1 1 1 1 2 3 4 5 6 7 8 9 Installation plate Installation plate fixing screw 4 x 25 mm Remote controller holder Fixing screw for 3 3 5 x 16 mm Black Battery AAA for remote controller Wireless remote controller Felt tape Used for left or left rear piping Deodorizing fi...

Page 5: ... 1 752 0 21 0 22 RH 130VGCT 650 C R 4 18 C S 5 76 RA6V23 FB WHT BLK 353 BLK RED 321 780o540o255 33 49 710 760 1 0 77 300 MS56 33 18 Cooling 2 1 0 8 474 390W 306W 3 29 3 15 710 740 98 98 2 96 2 84 960 810W 670W 2 91 2 76 Heating 2 4 474 390W 306W 3 11 2 98 670 700 98 98 3 58 3 43 960 840W 730W 2 73 2 59 Electrical data Fan motor Special remarks Compressor Electrical data Fan motor Special remarks C...

Page 6: ... K h A A W A kW A A mm kg dB rpm k k K h A A W mm kg dB rpm kg cc k Electrical data Fan motor Special remarks Compressor Electrical data Fan motor Special remarks Capacity Coefficient of performance C O P Capacity MSH XV12UV E1 Single phase 220 240V 50Hz 10 35 0 19 RC4V19 KA WHT BLK 316 BLK RED 299 850O278O191 9 5 42 37W 32W 3 10 10 MUH XV12UV E1 1 656 1 758 0 29 0 32 RH 231VHAT 1 100 C R 2 13 C S...

Page 7: ...HEARING FOR CONTINUOUS NOISE 39 SPL dB A LINE High NOTCH Heating Dry bulb temperature 20 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 BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb temperature 27 Wet bulb temperature 19 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 42 SPL dB A LINE High NOTCH Heating Dry ...

Page 8: ... 6 35 0 5m Gas line 9 52 0 43m Insulation 37 O D 21 I D 278 57 140 17 5 Wireless remote controller MSH XV12UV E1 INDOOR UNIT 116 5 81 5 818 278 850 165 629 56 or more 100 41 2 5 42 271 4 5 231 5 82 169 326 326 5 189 Air in Air out Insulation 28 Drain hose 16 Connected part O D Installation plate Wall hole 65 Indoor unit Installation plate Power supply cord Lead to right 1 0m Lead to left 0 3m Liqu...

Page 9: ...igerant pipe flared 9 52 MUH XV07 09UV 12 7 MUH XV12UV Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 Airout Air in Air in 109 110 147 Drainage 3holes 33 32 100mm or more 100mm or more 100mm or more 350mm or more REQUIRED SPACE 400mm or more Unit mm OUTDOOR UNIT MUH XV07UV MUH XV12UV MUH XV09UV E1 E1 E1 ...

Page 10: ...electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector MODELS WIRING DIAGRAM OUTDOOR UNIT SYMBOL TB 21S4 52C SYMBOL MF NR61 RT61 SR61 SR62 T61 SYMBOL C1 C65 DSAR F61 MC NAME NAME NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 2A COMPRESSOR INNER PROTECTOR OUTDOOR FAN MOTOR INNER FUSE VARISTOR DEFROS...

Page 11: ...r RT12 R V coil heating ON cooling OFF Flared connection Flared connection Compressor Stop valve MUH XV07UV E1 Unit mm MSH XV09UV E1 INDOOR UNIT OUTDOOR UNIT Indoor heat exchanger Room temperature thermistor RT11 with heat insulator Refrigerant pipe 9 52 Muffler 4 way valve Defrost thermistor RT61 Strainer Outdoor heat exchanger Capillary tube 3 0O 1 4O800 2 pcs Capillary tube 3 0O 1 6O450 Capilla...

Page 12: ...ength m 7 MSH XV07UV E1 MUH XV07UV E1 MSH XV09UV E1 MUH XV09UV E1 MSH XV12UV E1 MUH XV12UV E1 Outdoor unit precharged 770 870 1100 15m 400 7m 0 10m 150 Model Refrigerant piping length one way Unit mm MSH XV12UV E1 MUH XV12UV E1 INDOOR UNIT OUTDOOR UNIT with heat insulator with heat insulator Refrigerant pipe 12 7 4 way valve Muffler Stop valve with service port Strainer Refrigerant pipe 6 35 Stop ...

Page 13: ...lb temperature for your reference at service Cooling Heating How to measure the indoor air wet bulb dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet The thermometers must be attached to the position where air speed is high 2 Attach a...

Page 14: ... the international system of units SI unit system The conversion factor is 1 MPa Gauge 10 2 kgf f f Gauge 15 20 50 25 60 30 70 35 0 3 0 4 0 5 0 6 0 7 18 32 220V 240V 7 6 5 4 3 MUH XV07UV E1 Outdoor low pressure Ambient temperature C Ambient humidity 15 20 25 30 35 2 0 2 5 3 0 3 5 4 0 18 32 220V 240V 50 60 70 MUH XV07UV E1 Ambient temperature C Ambient humidity Outdoor unit current A kgf F Gauge MP...

Page 15: ...t current A Ambient temperature C Ambient temperature C MUH XV12UV E1 MUH XV07UV E1 kgf F Gauge MPa Gauge 15 20 50 25 60 30 32 70 35 0 3 0 4 0 5 0 6 0 7 18 220V 240V 7 6 5 4 3 MUH XV12UV E1 Outdoor low pressure 15 20 50 25 60 30 70 35 4 0 4 5 5 0 5 5 6 5 6 0 18 32 240V 220V MUH XV12UV E1 Outdoor unit current A Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity 5 10 15 20...

Page 16: ... 64 0 52 0 40 0 92 0 80 0 68 0 56 0 44 0 96 0 84 0 72 0 60 0 48 1 00 0 88 0 76 0 64 0 52 596 632 596 632 657 596 632 657 596 632 657 682 596 632 657 682 596 632 657 682 717 596 632 657 682 717 596 632 657 682 717 596 632 657 682 717 596 632 657 682 717 596 632 657 682 717 596 632 657 682 717 2 27 2 39 2 27 2 39 2 52 2 27 2 39 2 52 2 27 2 39 2 52 2 65 2 27 2 39 2 52 2 65 2 27 2 39 2 52 2 65 2 77 2 ...

Page 17: ... 64 0 52 0 40 0 92 0 80 0 68 0 56 0 44 0 96 0 84 0 72 0 60 0 48 1 00 0 88 0 76 0 64 0 52 738 760 738 760 795 738 760 795 738 760 795 817 738 760 795 817 738 760 795 817 845 738 760 795 817 845 738 760 795 817 845 738 760 795 817 845 738 760 795 817 845 738 760 795 817 845 738 760 795 817 845 1 82 1 94 1 82 1 94 2 07 1 82 1 94 2 07 1 82 1 94 2 07 2 21 1 82 1 94 2 07 2 21 1 82 1 94 2 07 2 21 2 32 1 ...

Page 18: ... 64 0 52 0 40 0 92 0 80 0 68 0 56 0 44 0 96 0 84 0 72 0 60 0 48 1 00 0 88 0 76 0 64 0 52 622 659 622 659 685 622 659 685 622 659 685 710 622 659 685 710 622 659 685 710 747 622 659 685 710 747 622 659 685 710 747 622 659 685 710 747 622 659 685 710 747 622 659 685 710 747 622 659 685 710 747 2 27 2 39 2 27 2 39 2 52 2 27 2 39 2 52 2 27 2 39 2 52 2 65 2 27 2 39 2 52 2 65 2 27 2 39 2 52 2 65 2 77 2 ...

Page 19: ... 64 0 52 0 40 0 92 0 80 0 68 0 56 0 44 0 96 0 84 0 72 0 60 0 48 1 00 0 88 0 76 0 64 0 52 770 792 770 792 829 770 792 829 770 792 829 851 770 792 829 851 770 792 829 851 881 770 792 829 851 881 770 792 829 851 881 770 792 829 851 881 770 792 829 851 881 770 792 829 851 881 770 792 829 851 881 1 82 1 94 1 82 1 94 2 07 1 82 1 94 2 07 1 82 1 94 2 07 2 21 1 82 1 94 2 07 2 21 1 82 1 94 2 07 2 21 2 32 1 ...

Page 20: ... 0 48 0 36 0 88 0 76 0 64 0 52 0 40 0 92 0 80 0 68 0 56 0 44 0 96 0 84 0 72 0 60 0 48 790 837 790 837 870 790 837 870 790 837 870 902 790 837 870 902 790 837 870 902 949 790 837 870 902 949 790 837 870 902 949 790 837 870 902 949 790 837 870 902 949 790 837 870 902 949 790 837 870 902 949 2 70 2 85 2 70 2 85 3 00 2 70 2 85 3 00 2 70 2 85 3 00 3 15 2 70 2 85 3 00 3 15 2 70 2 85 3 00 3 15 3 30 2 70 ...

Page 21: ...56 0 44 0 96 0 84 0 72 0 60 0 48 978 1006 978 1006 1053 978 1006 1053 978 1006 1053 1081 978 1006 1053 1081 978 1006 1053 1081 1119 978 1006 1053 1081 1119 978 1006 1053 1081 1119 978 1006 1053 1081 1119 978 1006 1053 1081 1119 978 1006 1053 1081 1119 978 1006 1053 1081 1119 2 16 2 31 2 16 2 31 2 46 2 16 2 31 2 46 2 16 2 31 2 46 2 63 2 16 2 31 2 46 2 63 2 16 2 31 2 46 2 63 2 76 2 16 2 31 2 46 2 63...

Page 22: ...36 0 88 0 76 0 64 0 52 0 40 0 92 0 80 0 68 0 56 0 44 0 96 0 84 0 72 0 60 0 48 815 863 815 863 897 815 863 897 815 863 897 931 815 863 897 931 815 863 897 931 980 815 863 897 931 980 815 863 897 931 980 815 863 897 931 980 815 863 897 931 980 815 863 897 931 980 815 863 897 931 980 2 70 2 85 2 70 2 85 3 00 2 70 2 85 3 00 2 70 2 85 3 00 3 15 2 70 2 85 3 00 3 15 2 70 2 85 3 00 3 15 3 30 2 70 2 85 3 0...

Page 23: ...4 0 96 0 84 0 72 0 60 0 48 1009 1038 1009 1038 1086 1009 1038 1086 1009 1038 1086 1116 1009 1038 1086 1116 1009 1038 1086 1116 1154 1009 1038 1086 1116 1154 1009 1038 1086 1116 1154 1009 1038 1086 1116 1154 1009 1038 1086 1116 1154 1009 1038 1086 1116 1154 1009 1038 1086 1116 1154 2 16 2 31 2 16 2 31 2 46 2 16 2 31 2 46 2 16 2 31 2 46 2 63 2 16 2 31 2 46 2 63 2 16 2 31 2 46 2 63 2 76 2 16 2 31 2 4...

Page 24: ...65 0 53 0 41 0 93 0 81 0 69 0 57 0 45 1050 1113 1050 1113 1156 1050 1113 1156 1050 1113 1156 1200 1050 1113 1156 1200 1050 1113 1156 1200 1263 1050 1113 1156 1200 1263 1050 1113 1156 1200 1263 1050 1113 1156 1200 1263 1050 1113 1156 1200 1263 1050 1113 1156 1200 1263 1050 1113 1156 1200 1263 3 67 3 88 3 67 3 88 4 08 3 67 3 88 4 08 3 67 3 88 4 08 4 28 3 67 3 88 4 08 4 28 3 67 3 88 4 08 4 28 4 49 3 ...

Page 25: ...65 0 53 0 41 0 93 0 81 0 69 0 57 0 45 1300 1338 1300 1338 1400 1300 1338 1400 1300 1338 1400 1438 1300 1338 1400 1438 1300 1338 1400 1438 1488 1300 1338 1400 1438 1488 1300 1338 1400 1438 1488 1300 1338 1400 1438 1488 1300 1338 1400 1438 1488 1300 1338 1400 1438 1488 1300 1338 1400 1438 1488 2 94 3 15 2 94 3 15 3 35 2 94 3 15 3 35 2 94 3 15 3 35 3 57 2 94 3 15 3 35 3 57 2 94 3 15 3 35 3 57 3 76 2 ...

Page 26: ...65 0 53 0 41 0 93 0 81 0 69 0 57 0 45 1117 1184 1117 1184 1230 1117 1184 1230 1117 1184 1230 1277 1117 1184 1230 1277 1117 1184 1230 1277 1343 1117 1184 1230 1277 1343 1117 1184 1230 1277 1343 1117 1184 1230 1277 1343 1117 1184 1230 1277 1343 1117 1184 1230 1277 1343 1117 1184 1230 1277 1343 3 67 3 88 3 67 3 88 4 08 3 67 3 88 4 08 3 67 3 88 4 08 4 28 3 67 3 88 4 08 4 28 3 67 3 88 4 08 4 28 4 49 3 ...

Page 27: ...65 0 53 0 41 0 93 0 81 0 69 0 57 0 45 1383 1423 1383 1423 1490 1383 1423 1490 1383 1423 1490 1530 1383 1423 1490 1530 1383 1423 1490 1530 1583 1383 1423 1490 1530 1583 1383 1423 1490 1530 1583 1383 1423 1490 1530 1583 1383 1423 1490 1530 1583 1383 1423 1490 1530 1583 1383 1423 1490 1530 1583 2 94 3 15 2 94 3 15 3 35 2 94 3 15 3 35 2 94 3 15 3 35 3 57 2 94 3 15 3 35 3 57 2 94 3 15 3 35 3 57 3 76 2 ...

Page 28: ... 1 86 1 67 611 658 705 2 36 2 23 2 08 733 780 827 2 76 2 64 2 45 827 865 912 3 16 3 01 2 85 893 931 978 3 57 3 41 3 26 949 978 1025 3 94 3 78 3 63 978 1006 1053 4 34 4 17 4 03 996 1043 1081 OUTDOOR WB INDOOR 10 5 0 5 10 15 20 DB Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT CAPACITY 3 1 KW INPUT 970 W 15 21 26 1 95 1 86 1 67 631 679 728 2 36 2 23 2 08 757 805 854 2 76 2 64 2 45 854 892 9...

Page 29: ...target temperature and room temperature Approx 2 or less This shows that the air conditioner is operating to reach the target temperature Please wait unit the target temperature is obtained This shows that the room temperature is approaching the target temperature Operation state Indication Operation Indicator Operation Indicator lamp The operation indicator at the right side of the indoor unit in...

Page 30: ...ss of thermostat s OFF ON In Auto the fan speed is as follows Initial temperature difference Room temperature minus set temperature 1 7 degrees or more High Room temperature minus set temperature Between 1 and 1 7 degrees Med Room temperature minus set temperature less than 1 degree Low Fan speed Difference between room temperature and set tem perature during operation Fuzzy control When the TOO C...

Page 31: ...tial room temperature Indoor fan and outdoor fan operate in the same cycle as the compressor When the room temperature is 23 C or over When the thermostat is ON the compressor repeats 8 minutes ON and 3 minutes OFF When the thermostat is OFF the compressor repeats 4 minutes OFF and 1 minute ON When the room temperature is under 23 C When the thermostat is ON the compressor repeats 2 minutes ON and...

Page 32: ...oor fan speed control Refer to 8 1 3 HEAT mode of I FEEL CONTROL 1 1 When the temperature of RT12 has been 37 C or more or when the set speed has been changed this control is released and the fan speed is the set speed 4 Flow soft control When the thermostat compressor is off the indoor fan operates as follows RT12 fan less than 18 C off 18 C or more Very Low Time condition Indoor fan speed less t...

Page 33: ... Low Operation time chart Example 3 Defrosting Defrosting of outdoor heat exchanger is controlled by DEICER P C board with detection by the defrost thermistor RT61 1 Starting conditions of defrost When all conditions of a c are satisfied the defrosting operation starts a The compressor cumulative operation time exceeds 40 minutes without the defrosting operation working b RT61 reads 3 0 C or less ...

Page 34: ...s same as DRY mode of I FEEL CONTROL Refer to 8 1 2 DRY mode of I FEEL CONTROL 2 3 Coil frost prevention Coil frost prevention is as same as DRY mode of I FEEL CONTROL Refer to 8 1 2 DRY mode of I FEEL CONTROL 3 35 30 25 20 15 10 10 15 20 25 30 35 Set temperature Initial room temperature Set temperature and initial room temperature in dry mode 8 4 HEAT OPERATION 1 Press OPERATE STOP ON OFF button ...

Page 35: ... CONTROL button 3 Positioning The vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle Confirming of standard position is performed in case of follows a When the OPERATE STOP ON OFF button is pressed POWER ON OFF b When the vane control is changed from AUTO to MANUAL c When the SWING is finished d When the test run starts e When the powe...

Page 36: ... air conditioner repeats the swing operation in various cycle as follows A H G F E D C B 5 Dew prevention During COOL or DRY operation at Vane Angle 4 or 5 when the cumulative operation time of compressor exceeds 1 hour the vane angle automatically changes to Angle 1 for dew prevention 6 SWING MODE By selecting SWING mode with the VANE CONTROL button the horizontal vane swings vertically The remot...

Page 37: ...N TIMER are not displayed SELECT EMERGENCY OPERATION switch Press once Cool Press again Heat Press once again Stop OPERATION INDICATOR lamp The following indication applies regardless of shape of the indicator 8 8 EMERGENCY TEST OPERATION In case of test run operation or emergency operation use the EMERGENCY OPERATION switch on the front of the indoor unit Emergency operation is available when the...

Page 38: ...ified according to the number of the indoor unit 9 3 TIMER SHORT MODE For service set time can be shortened by short circuit of JPG and JPS the electronic control P C board The time will be shortened as follows Refer to page 49 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 JP...

Page 39: ...egarded as the remote controller for the indoor unit The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set The setting will be cancelled if the breaker has turned off or the power supply has shut down Please conduct the above setting once again after the power has restored 9 5 AUTO RESTART FUNCTION When the indoor unit i...

Page 40: ...he remote controller Lead wiring Housing point 10 1 Cautions on troubleshooting 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care the following during servicing 1 Before servicing the air conditioner be sure to first turn off the remote controller to stop the unit and then after con firming the horizo...

Page 41: ...h on and off at 0 5 second interval Cause Indoor Outdoor unit Mis wiring 2 time flash Cause Indoor unit Trouble of room temp erature indoor coil thermistor 3 time flash Cause Indoor unit Trouble of indoor fan motor 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Refer to F How to check mis wiring and sirial singal error When outdoor unit doesn t operate on page 47 1 Check roo...

Page 42: ...r short or open circuit every 8 seconds during operation When rotational frequency feedback pulse signal is not emit during 12 second indoor fan operation When the defrost thermistor shorts or opens after the com pressor start up Check point Check wiring visual check and conductiv ity check Check indoor electronic control P C board Check deicer P C board Check electrical parts Check resistance of ...

Page 43: ...ce with a tester Part temperature 10 C 40 C Normal 5kΩ 60kΩ Abnormal Open or short circuit Normal MUH XV12UV 1 87 2 30Ω 3 44 4 22Ω Abnormal Open or short circuit 396 430Ω MSH XV07 09UV 320 348Ω 303 329Ω MSH XV12UV 287 311Ω WHT BLK BLK RED Normal Color of lead wire Normal MUH XV07 09UV 311 381Ω 283 347Ω 265 325Ω 292 359Ω WHT BLK BLK RED Abnormal Open or short circuit MUH XV12UV BLK YLW YLW RED RED ...

Page 44: ... the remote controller Re install the unit away from lights Attach a filter on receiving part Switch on the remote controller Is LCD display on the remote con troller displayed Remove 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 No not clear Yes No No Yes Measure the voltage...

Page 45: ...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 No Measure the resistance between CN201 1 on the indoor electronic control P C board and N on the terminal block with the tester Is re...

Page 46: ...rd No No Yes Yes No Check the outdoor fan motor and rectify the connecting wire Is there 220 240V AC between 4 on the compressor contactor 52C on the deicer P C board w1 Replace the deicer P C board Is there 5V DC between J205 J101 on the deicer P C board w1 w1 Refer to page 50 No Yes Rectify the indoor outdoor connecting wire Rectify the connecting wire Is there 220 240V AC between 2 N on the out...

Page 47: ...on the deicer P C board 2 Refer to page 50 By tester the stylus is between 5 10V Replace the outdoor deicer P C board Rectify the indoor outdoor connecting wire Check and rectify the fuse and the varistor on the outdoor deicer P C board Rectify the indoor outdoor connecting wire Replace the indoor electronic control P C board 1 Short circuit of JPG and JPS on the indoor electronic control P C boar...

Page 48: ...AT mode by pressing the EMERGENCY OPERATION switch Is there 220 240V AC between CN7211 2 on the deicer P C board Refer to page 50 Replace the deicer P C board Yes Yes Yes No Replace the R V coil Turn ON the power supply and operate the indoor unit in COOL mode by pressing the EMERGENCY OPERATION switch Is there 220 240V AC between CN7211 2 on the deicer P C board Refer to page 50 Unit operates COO...

Page 49: ... 10 20 30 40 10 20 30 40 50 60 Emergency operation switch Fan motor power supply Temperature Resistance k Auto restart function Cut the Resistor JR07 Refer to page 39 CN111 Room temperature thermistor RT11 Power supply input 220 240V 12V DC 5V DC Indoor electronic control P C board MSH XV07UV MSH XV12UV MSH XV09UV E1 E1 E1 Vane motor power supply CN151 JPGND J205 CN201 CN302 R132 Power monitor rec...

Page 50: ... fan motor 220 240V AC CN661 1 2 Defrost thermistor RT61 MUH XV07UV MUH XV12UV MUH XV09UV E1 E1 E1 F61 Fuse 2A 250V Defrost interval time short pin JPDS JPSG Refer to page 38 J205 J101 5V DC 12V DC J204 J101 R601 5 10VDC NR61 Varistor Jumper wire for change in defrost setting JRF JRG Refer to page 38 ...

Page 51: ...R L holder 9 Remove the electronic control P C board 10 Open the R L holder and the power monitor receiver P C board Terminal block cover Room temperature thermistor connector Cord clamp Indoor electronic control P C board Vane motor connector Fan motor connector Screw of the ground wire 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector is a termina...

Page 52: ...ove the electrical box 4 Removing the vane 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 remove the nozzle assembly 4 Remove the screws both upper and lower of the vane motor disconnect the connector 5 Remove the vane motor Screws of the fan motor 5 Removing the line flow fan and the indoor fan motor 1 Remove the...

Page 53: ...rvice panel and the cabinet 2 Disconnect all the connectors and the terminals on the deicer P C board 3 Remove the deicer P C board 11 2 MUH XV07UV MUH XV09UV MUH XV12UV OUTDOOR UNIT NOTE These photos use MUH XV12UV MUH XV07UV or MUH XV09UV is almost the same as MUH XV12UV E1 E1 E1 E1 E1 E1 E1 Terminal block Screws Deicer P C board Photo 1 Photo 3 Screws of the top panel Service panel Screws of th...

Page 54: ...ve the cabinet Refer to 1 2 Remove the relay panel 3 Remove the soundproof felt 4 Remove the terminal cover on the compressor 5 Disconnect lead wires from the glass terminal of the com pressor 6 Recover gas from the refrigerant circuit 7 Disconnect the welded part of the discharge pipe 8 Disconnect the welded part of the suction pipe 9 Remove nuts fixing the compressor 10 Remove the compressor NOT...

Page 55: ...1 1 Including 5 6 7 2PCS SET 3PCS SET MAC 1800DF MAC 1300FT Remarks Part No No Part Name 1 1 1 1 2 1 3 2 1 1 1 MSH XV07 UV WH E1 MSH XV09 UV WH E1 MSH XV12 UV WH E1 1 1 1 1 2 1 3 2 1 1 1 2 9 4 3 6 MSH XV07UV WH MSH XV09UV WH MSH XV12UV WH E1 E1 E1 5 1 12 2 REMOTE CONTROLLER AND REMOTE CONTROLLER HOLDER E02 671 426 E02 527 083 12 13 REMOTE CONTROLLER REMOTE CONTROLLER HOLDER MAC 1200RC 1 1 1 1 1 1 ...

Page 56: ...RMAL FUSE 3 15A RC4V19 RC4V19 2PCS SET 2PCS SET 93 F11 NR11 MV RT11 MF MF TB RT12 F12 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 2 1 1 MSH XV07 UV WH E1 MSH XV09 UV WH E1 MSH XV12 UV WH E1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 AUTO RESTART Including receiver P C board AUTO RESTART Including receiver P C board AUTO RESTART Including receiver P C board 12 3 INDOOR UNIT ELECTRICA...

Page 57: ...ET BASE BASE STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID 4 WAY VALVE 4 WAY VALVE SERVICE PANEL BACK PANEL MOTOR SUPPORT MOTOR SUPPORT CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE RH 130VGCT RH 174VGCT RH 231VHAT 3RUBBERS SET 3RUBBERS SET 9 52 12 7 6 35 3 0x 1 4x800 3 0x 1 4x500 3 0x 1 4x600 3 0x 1 6x600 3 0x...

Page 58: ... C BOARD SURGE ABSORBER TERMINAL BLOCK R V COIL FUSE RA6V23 RA6V33 25 450VAC 30 450VAC 3P 250V 2A MF MF C1 C1 RT61 DSAR TB 21S4 F61 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MUH XV09 UV E1 MUH XV12 UV E1 MUH XV07 UV E1 1 1 1 1 1 1 1 1 1 10 11 E02 444 704 E02 444 705 DRAIN SOCKET DRAIN CAP 33 1 2 1 2 1 2 1 2 5 3 4 7 6 12 6 OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 12 7 ACCESSORY Part numbers tha...

Page 59: ...ydrogen sulphide emitted from tobacco and odor of pets Clean DEODORIZING FILTER every two weeks If the filter is particularly dirty clean the filter more often For cleaning soak the filter in warm water for a while and then wash and rinse it Dry the filter in the shade thoroughly When the filter color is still dark even after cleaning replace the filter with a new one Replace the filter at least o...

Page 60: ...pecifications subject to change without notice C C Copyright 2002 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Jan 2002 No OB294 222 Made in Japan HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN ...

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