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Mitsubishi Electric MU-A07YV, Service Manual

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Mitsubishi Electric MU-A07YV Service Manual Download Page 24

24

OPERATING PROCEDURE

PHOTOS

3. Removing the propeller and the outdoor fan motor

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the propeller nut.
(3) Remove the propeller.
NOTE : Loose the propeller in the rotating direction for 

removal.
When attaching the propeller, align the mark on the 
propeller and the motor shaft cut section.
Set the propeller in position by using the cut on the 
shaft and the mark on the propeller.

(4) Remove lead clamps and disconnect the outdoor fan motor

connector.

(5) Remove screws fixing the fan motor.
(6) Remove the outdoor fan motor.

Photo 5

Propeller nut

Outdoor

fan motor

Screws of the 
outdoor fan motor

Lead clamps

Hook

Outdoor
fan motor
connector

Propeller

Outdoor fan capacitor

Compressor 
capacitor

Terminal block

2. Removing the electrical parts

(1) Remove the service panel and the cabinet.(Refer to 1.)
(2) Remove the following parts.

• Compressor capacitor (C1)
• Outdoor fan capacitor (C2)
• Terminal block

Photo 4

Contractor

Screw

Relay panel

Screws

Screws of the 
outdoor fan motor

OB330-1.qxp  04.3.2 0:57 PM  Page 24

Summary of Contents for MU-A07YV

Page 1: ...reless type Models MU A07YV MU A09YV MU A12YV E1 E1 E1 MU A07YV MU A09YV MU A12YV E1 E1 E1 No OB330 REVISED EDITION A HFC utilized R410A SPLIT TYPE AIR CONDITIONERS Indication of model name NOTE This service manual describes technical data of outdoor units As for indoor units MSC A07YV MSC A09YV and MSC A12YV refer to the service manual OB329 As for indoor unit MCF A12WV refer to the service manua...

Page 2: ...e layer Pay particular attention to the following points though the basic installation procedure is same as that for R22 conditioners 1 As R410A has working pressure approximate 1 6 times as high as that of R22 some special tools and piping parts materials are required Refer to the table below 2 Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during ...

Page 3: ...ose Torque wrench Flare tool Flare gauge Vacuum pump adapter Electronic scale for refrigerant charging No Not Substitutable for R410A Yes Substitutable for R410A No 12 7 mm 1 Tools dedicated for the air conditioner with R410A refrigerant The following tools are required for R410A refrigerant Some R22 tools can be substituted for R410A tools The diameter of the service port on the stop valve in out...

Page 4: ...o the refrigerant circuit Use the vacuum pump for air purging for the purpose of environmental protection 5 Additional charge For additional charging charge the refrigerant from liquid phase of the gas cylinder If the refrigerant is charged from the gas phase composition change may occur in the refrigerant inside the cylinder and the outdoor unit In this case ability of the refrigerating cycle dec...

Page 5: ...350 NEO22 2 3 0 9 1 686 3 00 680 98 23 3 22 MU A09YV E1 Single phase 230V 50Hz 10 RN099VHSHT 700 C R 3 40 C S 4 56 RC6V20 AC WHT BLK 410 BLK RED 433 780o540o255 34 45 735 1 0 60 350 NEO22 2 55 1 1 1 686 3 32 760 99 24 3 10 0 22 3 21 MU A12YV E1 Indoor unit MSC A12YV E1 Single phase 230V 50Hz 1 7 1 914 10 4 92 97 29 RN135VHSHT 900 C R 2 79 C S 3 36 RA6V33 FC WHT BLK 223 BLK RED 228 780o540o255 36 4...

Page 6: ...ER FREQUENCIES Hz Test conditions Cooling DB35 WB24 MU A12YV E1 COOL FUNCTION 49 SPL dB A LINE OUTDOORUNIT MICROPHONE 1m 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz Test conditions Cooling DB27 WB19 MU A07YV E...

Page 7: ...PRESSOR CONTACTOR OUTDOOR FAN MOTOR INNER FUSE INNER PROTECTOR NOTE 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector 320 25 4 3 3 5 155 90 104 74 260 10 780 500 122 40 540 320 285 255 Service panel Gas refrigerant pipe joint Refrigerant pipe flared 9...

Page 8: ...cooling Unit mm Refrigerant pipe 12 7 with heat insulator Stop valve with service port Stop valve with service port Strainer 100 Refrigerant pipe 6 35 with heat insulator Stop valve Capillary tube 3 0x 1 4x550 Refrigerant flow in cooling Outdoor heat exchanger Compressor Compressor Flared connection Flared connection Flared connection Flared connection Muffler Muffler Unit mm Refrigerant pipe 9 52...

Page 9: ...W Air flow should be set at MAX 3 MAIN READINGS 1 Indoor intake air wet bulb temperature CWB 2 Indoor outlet air wet bulb temperature CWB 3 Outdoor intake air dry bulb temperature CDB 4 Total input W Indoor air wet dry bulb temperature difference on the left side of the chart on next page shows the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry ...

Page 10: ...T OUTDOOR UNIT Wet and dry bulb thermometers Wet and dry bulb thermometers MSC A07YV E1 MU A07YV E1 MU A12YV E1 MSC A12YV E1 MU A09YV E1 MSC A09YV E1 8 5 7 8 7 1 6 4 5 8 5 1 9 6 8 8 8 0 7 2 6 5 5 7 11 0 10 0 9 1 8 2 7 4 6 5 MU A12YV E1 MCF A12WV E1 9 7 8 9 8 1 7 3 6 6 5 8 8 1 CAPACITY AND THE INPUT CURVES 18 32 230V 15 20 50 25 60 30 70 35 0 7 0 8 0 9 1 0 1 1 1 2 1 3 7 8 9 10 11 12 13 15 20 50 25 ...

Page 11: ... E1 Outdoor low pressure Outdoor unit current A kgf F Gauge MPa Gauge kgf F Gauge MPa Gauge 18 32 230V 15 20 50 25 60 30 70 35 3 4 5 6 18 32 230V 15 20 50 25 60 30 70 35 0 7 0 8 0 9 1 0 1 1 1 2 1 3 7 8 9 10 11 12 13 Outdoor low pressure Outdoor unit current A kgf F Gauge MPa Gauge Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity A...

Page 12: ...32 744 2 94 0 94 0 32 765 28 18 2 70 2 27 0 84 572 2 59 2 17 0 84 601 2 48 2 09 0 84 629 2 39 2 01 0 84 658 28 20 2 82 2 03 0 72 601 2 70 1 95 0 72 636 2 62 1 89 0 72 651 2 53 1 82 0 72 679 28 22 2 93 1 76 0 60 622 2 83 1 70 0 60 661 2 76 1 66 0 60 679 2 65 1 59 0 60 708 28 24 3 08 1 48 0 48 651 2 97 1 42 0 48 686 2 90 1 39 0 48 708 2 81 1 35 0 48 744 28 26 3 17 1 14 0 36 686 3 08 1 11 0 36 722 3 ...

Page 13: ...32 851 2 54 0 81 0 32 869 28 18 2 25 1 89 0 84 701 2 07 1 74 0 84 744 1 99 1 67 0 84 758 28 20 2 37 1 71 0 72 729 2 21 1 59 0 72 765 2 13 1 53 0 72 787 28 22 2 51 1 50 0 60 758 2 35 1 41 0 60 801 2 27 1 36 0 60 815 28 24 2 65 1 27 0 48 787 2 48 1 19 0 48 822 2 42 1 16 0 48 840 28 26 2 78 1 00 0 36 815 2 62 0 94 0 36 851 2 54 0 91 0 36 869 29 18 2 25 1 98 0 88 701 2 07 1 82 0 88 744 1 99 1 75 0 88 ...

Page 14: ...8 827 3 26 0 91 0 28 851 28 18 3 00 2 40 0 80 636 2 87 2 30 0 80 668 2 75 2 20 0 80 700 2 65 2 12 0 80 731 28 20 3 12 2 12 0 68 668 3 00 2 04 0 68 708 2 91 1 98 0 68 723 2 81 1 91 0 68 755 28 22 3 25 1 82 0 56 692 3 14 1 76 0 56 735 3 06 1 71 0 56 755 2 93 1 64 0 56 787 28 24 3 42 1 50 0 44 723 3 29 1 45 0 44 763 3 21 1 41 0 44 787 3 11 1 37 0 44 827 28 26 3 52 1 13 0 32 763 3 42 1 09 0 32 803 3 3...

Page 15: ...8 946 2 82 0 79 0 28 966 28 18 2 50 2 00 0 80 779 2 30 1 84 0 80 827 2 21 1 76 0 80 843 28 20 2 63 1 79 0 68 811 2 45 1 66 0 68 851 2 36 1 60 0 68 875 28 22 2 78 1 56 0 56 843 2 60 1 46 0 56 890 2 51 1 41 0 56 906 28 24 2 93 1 29 0 44 875 2 75 1 21 0 44 914 2 68 1 18 0 44 934 28 26 3 09 0 99 0 32 906 2 91 0 93 0 32 946 2 82 0 90 0 32 966 29 18 2 50 2 10 0 84 779 2 30 1 93 0 84 827 2 21 1 85 0 84 8...

Page 16: ...186 4 48 1 08 0 24 1220 28 18 4 11 3 13 0 76 912 3 94 2 99 0 76 958 3 78 2 87 0 76 1003 3 64 2 77 0 76 1049 28 20 4 29 2 74 0 64 958 4 11 2 63 0 64 1015 3 99 2 55 0 64 1037 3 85 2 46 0 64 1083 28 22 4 46 2 32 0 52 992 4 31 2 24 0 52 1055 4 20 2 18 0 52 1083 4 03 2 09 0 52 1129 28 24 4 69 1 88 0 40 1037 4 52 1 81 0 40 1094 4 41 1 76 0 40 1129 4 27 1 71 0 40 1186 28 26 4 83 1 35 0 28 1094 4 69 1 31 ...

Page 17: ...4 1357 3 87 0 93 0 24 1385 28 18 3 43 2 61 0 76 1117 3 15 2 39 0 76 1186 3 03 2 30 0 76 1208 28 20 3 61 2 31 0 64 1163 3 36 2 15 0 64 1220 3 24 2 07 0 64 1254 28 22 3 82 1 98 0 52 1208 3 57 1 86 0 52 1277 3 45 1 79 0 52 1300 28 24 4 03 1 61 0 40 1254 3 78 1 51 0 40 1311 3 68 1 47 0 40 1340 28 26 4 24 1 19 0 28 1300 3 99 1 12 0 28 1357 3 87 1 08 0 28 1385 29 18 3 43 2 74 0 80 1117 3 15 2 52 0 80 11...

Page 18: ...206 4 48 1 25 0 28 1241 28 18 4 11 3 29 0 80 928 3 94 3 15 0 80 974 3 78 3 02 0 80 1021 3 64 2 91 0 80 1067 28 20 4 29 2 92 0 68 974 4 11 2 80 0 68 1032 3 99 2 71 0 68 1056 3 85 2 62 0 68 1102 28 22 4 46 2 50 0 56 1009 4 31 2 41 0 56 1073 4 20 2 35 0 56 1102 4 03 2 25 0 56 1148 28 24 4 69 2 06 0 44 1056 4 52 1 99 0 44 1114 4 41 1 94 0 44 1148 4 27 1 88 0 44 1206 28 26 4 83 1 55 0 32 1114 4 69 1 50...

Page 19: ...8 1380 3 87 1 08 0 28 1409 28 18 3 43 2 74 0 80 1137 3 15 2 52 0 80 1206 3 03 2 42 0 80 1230 28 20 3 61 2 45 0 68 1183 3 36 2 28 0 68 1241 3 24 2 20 0 68 1276 28 22 3 82 2 14 0 56 1230 3 57 2 00 0 56 1299 3 45 1 93 0 56 1322 28 24 4 03 1 77 0 44 1276 3 78 1 66 0 44 1334 3 68 1 62 0 44 1363 28 26 4 24 1 36 0 32 1322 3 99 1 28 0 32 1380 3 87 1 24 0 32 1409 29 18 3 43 2 88 0 84 1137 3 15 2 65 0 84 12...

Page 20: ...roller to stop the unit and then after con firming the horizontal vane is closed turn off the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 4 When ...

Page 21: ...emperature thermistor and indoor coil thermis tor Refer to Test point diagram and voltage Refer to Check of indoor fan motor 1 Check indoor outdoor connecting wire 2 Refer to Check of indoor electronic control P C board Outdoor unit doesn t stop even if indoor unit stops Check of wiring diagram of outdoor unit on page 7 W1 The case of the trouble of the serial signal When the power is turned off a...

Page 22: ...46 3 01Ω 2 96 3 63Ω C R C S Abnormal Open or short circuit 4 02 4 92Ω MU A09YV MU A12YV Abnormal Open or short circuit MU A12YV P INNER PROTECTOR Color of lead wire 9 3 Trouble criterion of main parts A A Check of MU MUX TYPE MUH MXZ TYPE SWITCH OVER Start Turn OFF the power supply indoor outdoor unit Set switch SW2 2 on the indoor electronic control P C board to MU type w1 Does the unit operate O...

Page 23: ...panel Screws of the cabinet Screws of the cabinet Photo 2 Screws of the front panel and motor support Screws of the cabinet 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector is a terminal with lock mechanism 1Slide the sleeve 2Pull the terminal while pushing the locking lever 1Hold the sleeve and pull out the terminal slowly In case of terminal with...

Page 24: ... on the propeller 4 Remove lead clamps and disconnect the outdoor fan motor connector 5 Remove screws fixing the fan motor 6 Remove the outdoor fan motor Photo 5 Propeller nut Outdoor fan motor Screws of the outdoor fan motor Lead clamps Hook Outdoor fan motor connector Propeller Outdoor fan capacitor Compressor capacitor Terminal block 2 Removing the electrical parts 1 Remove the service panel an...

Page 25: ...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 NOTE Before using a burner reclaim gas from the pipes until the pressure gauge shows 0 kg cm2 0 MPa Use the burner under the condition that gas can be recover...

Page 26: ...02 742 661 E02 747 661 E02 742 662 E02 815 245 E02 815 233 E02 835 233 E02 336 515 E02 815 297 E02 459 936 E02 441 936 OUTDOOR HEAT EXCHANGER CABINET GRILLE OUT COMPRESSOR COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET BASE STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID SERVICE PANEL BACK PANEL BACK PANEL MOTOR SUPPORT TOP PANEL CAPILLARY TUBE CAPILLARY TUBE RN092VHSHT RN099VHSHT RN135VHSHT 3RUBBERS...

Page 27: ... CAPACITOR TERMINAL BLOCK TERMINAL BLOCK COMPRESSOR CONTACTOR SURGE ABSORBER RC6V20 RA6V33 1 5 440V AC 2 0 440V AC 20 440V AC 25 440V AC 30 440V AC 3P 2P MF MF C2 C2 C1 C1 C1 TB1 TB2 52C DSAR 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 No Part No Part name Remarks Symbol in Wiring Diagram Q ty unit MU A07YV E1 MU A09YV E1 MU A12YV E1 1 2 3 4 6 5 11 2 OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONA...

Page 28: ...tributed in Mar 2004 No OB330 REVISED EDITION A 6 Distributed in Dec 2003 No OB330 6 Made in Japan New publication effective Mar 2004 Specifications subject to change without notice HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN ...

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