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Mitsubishi Electric MUH-A07YV-E1, Service Manual, Page: 36 / 36

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Mitsubishi Electric MUH-A07YV-E1 Service Manual Download Page 36

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Copyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD

Distributed in Dec. 2003. No.OB331 6
Made in Japan

New publication, effective Dec. 2003
Specifications subject to change without notice.

HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN

OB331-2.qxp  03.12.3 1:22 PM  Page 36

Summary of Contents for MUH-A07YV-E1

Page 1: ...SSOR CONTROL 20 10 SERVICE FUNCTIONS 22 11 TROUBLESHOOTING 22 12 DISASSEMBLY INSTRUCTIONS 29 13 PARTS LIST 32 Wireless type Models MUH A07YV MUH A09YV MUH A12YV E1 E1 E1 No OB331 HFC utilized R410A SPLIT TYPE HEAT PUMP AIR CONDITIONERS MUH A07YV MUH A09YV MUH A12YV E1 E1 E1 Indication of model name NOTE This manual describes technical data of outdoor units As for indoor units MSC A07 A09 A12YV ref...

Page 2: ...not to allow water and other contaminations to enter the R410A refrigerant during storage and installation since it is more susceptible to contaminations than R22 3 For refrigerant piping use clean pressure proof parts materials specifically designed for R410A Refer to 2 Refrigerant piping 4 Composition change may occur in R410A since it is a mixed refrigerant When charging charge liquid refrigera...

Page 3: ... cylinder because the refrigerant bubbles due to high pressure and high speed vaporization No No No Yes Yes New New New Gauge manifold Charge hose 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...

Page 4: ...ith indoor unit to the flare and the union seat surfaces 4 Air purge Do not discharge the refrigerant into the atmosphere Take care not to discharge refrigerant into the atmosphere during installation reinstallation or repairs to 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...

Page 5: ...0Hz 1 686 10 23 0 22 RN092VHSHT 600 C R 3 87 C S 6 14 RC6V20 AB WHT BLK 410 BLK RED 433 780o540o255 35 47 735 1 0 62 350 NEO22 33 18 2 3 0 9 3 00 680 98 2 78 3 22 2 5 2 86 655 99 2 64 3 62 MUH A09YV E1 Single phase 230V 50Hz 1 710 10 24 0 31 RN104VHSHT 700 C R 3 40 C S 4 56 RA6V33 FB WHT BLK 223 BLK RED 228 780o540o255 38 49 825 1 1 00 350 NEO22 33 18 2 55 1 1 3 32 760 99 3 01 3 21 3 05 3 52 805 9...

Page 6: ...onditions Cooling DB35 WB24 Heating DB 7 WB 6 MUH A09YV E1 MUH A12YV E1 COOL FUNCTION 49 HEAT 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 DB35 WB...

Page 7: ...1 BLK RED 3 WHT S C R CN730 RT61 BLK 2 3 1 RED WHT 12V TO CONNECTING INDOOR UNIT TB2 3 N TB1 L N PE N NR61 F61 T61 C65 CN711 52C 230V50Hz OUTDOOR UNIT 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 1...

Page 8: ... ON cooling OFF MUH A07YV MUH A09YV E1 E1 OUTDOOR UNIT with heat insulator Refrigerant pipe 9 52 4 way valve Defrost thermistor RT61 Muffler Outdoor heat exchanger Capillary tube 3 0x 1 4x800 2 pcs MUH A07YV 3 0x 1 4x500 2 pcs MUH A09YV Capillary tube 3 0x 1 4x500 MUH A07YV 3 0x 1 4x600 MUH A09YV Capillary tube 3 0x 1 4x600 MUH A07YV 3 0x 1 4x1000 MUH A09YV Check valve Strainer 100 Refrigerant pip...

Page 9: ...o the operation of the air conditioner under normal conditions since operating conditions vary according to the areas where these units are installed The following information has been pro vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve 1 GUARANTEED VOLTAGE 198 264V 2 AIR FLOW Air flow should be set at MAX 3 MAIN READING...

Page 10: ...n 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 at least 2 sets of wet and dry bulb thermometers to the outdoor air intake Cover the thermometers to prevent direct rays of the sun 3 Check that the air filter is cleaned 4 Open windows and doors of room 5 Press the EMERGEN...

Page 11: ... E1 Outdoor low pressure Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity Outdoor unit current A 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 MUH A09YV E1 Outdoor low pressure Ambient temperature C Ambient humidity 15 20 50 25 60 30 70 35 1 2 4 3 18 32 230V MUH A09YV E1 Ambient temperature C Ambient humidity Outdoor unit current A kg...

Page 12: ...ture 7 15 20 C Wet bulb temperature 6 12 14 5 C 7 21 230V 5 10 15 20 25 3 4 5 6 7 21 230V 5 10 15 20 25 2 3 4 5 7 21 230V 5 10 15 20 25 2 3 4 5 Outdoor unit current A Outdoor unit current A Outdoor unit current A Ambient temperature C Ambient temperature C Ambient temperature C MUH A12YV E1 MUH A07YV E1 MUH A09YV E1 ...

Page 13: ...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 14: ...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 15: ...28 827 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 ...

Page 16: ...28 946 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 ...

Page 17: ...4 4 48 1 08 0 24 1166 28 18 4 11 3 13 0 76 872 3 94 2 99 0 76 916 3 78 2 87 0 76 959 3 64 2 77 0 76 1003 28 20 4 29 2 74 0 64 916 4 11 2 63 0 64 970 3 99 2 55 0 64 992 3 85 2 46 0 64 1036 28 22 4 46 2 32 0 52 948 4 31 2 24 0 52 1008 4 20 2 18 0 52 1036 4 03 2 09 0 52 1079 28 24 4 69 1 88 0 40 992 4 52 1 81 0 40 1046 4 41 1 76 0 40 1079 4 27 1 71 0 40 1134 28 26 4 83 1 35 0 28 1046 4 69 1 31 0 28 1...

Page 18: ...4 1297 3 87 0 93 0 24 1324 28 18 3 43 2 61 0 76 1068 3 15 2 39 0 76 1134 3 03 2 30 0 76 1155 28 20 3 61 2 31 0 64 1112 3 36 2 15 0 64 1166 3 24 2 07 0 64 1199 28 22 3 82 1 98 0 52 1155 3 57 1 86 0 52 1221 3 45 1 79 0 52 1243 28 24 4 03 1 61 0 40 1199 3 78 1 51 0 40 1254 3 68 1 47 0 40 1281 28 26 4 24 1 19 0 28 1243 3 99 1 12 0 28 1297 3 87 1 08 0 28 1324 29 18 3 43 2 74 0 80 1068 3 15 2 52 0 80 11...

Page 19: ...PUT Q INPUT CAPACITY 3 05 KW INPUT 840 W 15 21 26 1 92 1 83 1 65 546 588 630 2 32 2 20 2 04 655 697 739 2 71 2 59 2 41 739 773 815 3 11 2 96 2 81 798 832 874 3 51 3 36 3 20 848 874 916 3 87 3 72 3 57 874 899 941 4 27 4 10 3 97 890 932 966 MSC A12YV MUH A12YV E1 E1 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 9 KW INPUT 1080 W 15 21 26 2 ...

Page 20: ...e The defrosting time exceeds 10 minutes NOTE During high pressure protection and for 4 min and 15 sec after high pressure protection defrosting of outdoor heat exchanger is not detected by the defrost thermistor RT61 Refer to 9 1 2 Defrosting 52 C 48 C Outdoor fan motor Outdoor fan motor turn OFF Outdoor fan motor turn ON ON ON OFF OFF 1 High pressure protection During heating operation the outdo...

Page 21: ...sec 15 sec 30 sec 5 sec NOTE Very Low Operation time chart Example 3 R V coil control Heating ON Cooling OFF Dry OFF When operation starts the 4 way valve reverses for 5 seconds right before start up of the compressor ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF Compressor R V coil Outdoor fan COOL DRY HEAT 5 sec 5 sec Operation time chart 9 2 I FEEL CONTROL OPERATION 9 2 1 HEAT mode of I FEEL CONTRO...

Page 22: ... 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 connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires MUH A07YV MUH A09YV...

Page 23: ...e Indoor unit Trouble of indoor fan motor 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit 7 time flash Cause Outdoor unit Trouble of outdoor control system Check room temperature thermistor and indoor coil thermis tor Refer to Test point diagram and voltage Refer to Check of indoor fan motor Refer to E Check of outdoor thermistor on page 27 Replace the deicer P C board 1 time...

Page 24: ... switch SW2 2 on the indoor electronic control P C board set to MUH type No Change the switch SW 2 2 on the indoor electronic control P C board to MUH type Yes Is there 5V DC between J205 J101 on the deicer P C board Is there 5V DC between J205 J101 on the deicer P C board 24 Compressor MC INNER PROTECTOR MUH A07 A09YV 150i 5 C OPEN 90i10 C CLOSE MUH A12YV 155i 5 C OPEN 90i10 C CLOSE Part name Che...

Page 25: ...is not short circuit After 3 minutes does the unit operate in HEAT mode Ok No Is there 230V AC between CN7211 2 on the deicer P C board 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 Unit operates HEAT mode even if it is set to COOL mode w First measure the resistance of R...

Page 26: ...oor electronic control P C board Turn ON the power supply outdoor unit Is there 230V AC between outdoor terminal block L N TB1 No Check the outdoor power supply power supply cord and connection Yes Turn ON the power supply indoor unit No Replace the deicer P C board 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 Yes ...

Page 27: ...n ON the power supply and press the EMERGENCY OPERATION switch Is the resistance of thermistor normal No Yes Does the unit operate 10 minutes or more Replace the deicer P C board OK Defective contact of the connector is considered Turn OFF the power supply Start When OPERATION INDICATOR lamp flashes 6 time Thermistors in the outdoor unit are abnormal ...

Page 28: ...30V AC CN721 R V coil 230V AC F61 Fuse 2A 250V CN661 1 2 Defrost thermistor RT61 12V DC J204 J101 R601 5 10VDC 5V DC J205 J101 Power supply input 230V AC NR61 Varistor Jumper wire for change in defrost setting JRF JRG Refer to page 22 Defrost interval time short pin JPDS JPSG Refer to page 22 ...

Page 29: ... 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 wit...

Page 30: ... 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 Propeller nut Screws of the outdoor fan motor Lead clamps Hook Outdoor fan motor connector OPERATING PROCEDURE PHOTOS 2 Removing the deicer P C board 1 Remove the service panel and the cabinet 2 Disconnect all the connectors and...

Page 31: ...efrigerant 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 recovered even when the inner pressure rises by heat Photo 6 Compress...

Page 32: ...SE STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID 4 WAY VALVE SERVICE PANEL BACK PANEL MOTOR SUPPORT MOTOR SUPPORT TOP PANEL CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE RN092VHSHT RN104VHSHT RN135VHSHT 3RUBBERS SET 9 52 12 7 6 35 3 0x 1 4x800 3 0x 1 4x500 3 0x 1 4x600 3 0x 1 4x1000 3 0x 1 6x600 3 0x 1 6x1050 MC MC MC 1 1 1 1 3 1 1 1 1 1 1 ...

Page 33: ...E VARISTOR RC6V20 RA6V33 20 440V AC 25 440V AC 30 440V AC 3P 2P 250V 2A MF MF C1 C1 C1 DSAR TB1 TB2 RT61 21S4 F61 NR61 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 E02 817 704 E02 440 705 12 13 DRAIN SOCKET DRAIN CAP 1 2 1 2 1 2 No Part No Remarks Symbol in Wiring Diagram Part name 2PCS SET Q ty unit MUH A07YV E1 MUH A09YV E1 MUH A12YV E1 1 2 4 3 8 7 6 5 13 2 OUTDOOR UNIT ELEC...

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Page 36: ...RIC ENGINEERING CO LTD Distributed in Dec 2003 No OB331 6 Made in Japan New publication effective Dec 2003 Specifications subject to change without notice HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN ...

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