Mitsubishi Electric MUZ-A09YV-E1 Service Manual Download Page 1

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SERVICE MANUAL

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················5

3. SPECIFICATION·················································5

4. NOISE CRITERIA CURVES ·······························7

5. OUTLINES AND DIMENSIONS ·························8

6. WIRING DIAGRAM ············································9

7. REFRIGERANT SYSTEM DIAGRAM ··············11

8. PERFORMANCE CURVES ······························12

9. ACTUATOR CONTROL····································21

10. SERVICE FUNCTIONS·····································22

11. TROUBLESHOOTING ······································22

12. DISASSEMBLY INSTRUCTIONS·····················34

13. PARTS LIST······················································38

Wireless type
Models

No. OB328

REVISED EDITION-A

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

MUZ-A09YV -
MUZ-A12YV -
MUZ-A09YVH -
MUZ-A12YVH -

Indication of
model name

NOTE:
This service manual describes technical data of the outdoor units.
•As for indoor units MSZ-A09YV-

and MSZ-A12YV-

, refer to the service manual OB327.

•As for indoor unit MCFZ-A12WV-

, refer to the service manual OB344.

HFC

utilized

R410A

Revision A:

●

MUZ-A12YV-

and MUZ-A12YVH-

can be connected to MCFZ-A12WV-

●

Some mistakes were corrected.

Please void OB328.

OB328 A--1qxp 04.4.26 4:49 PM Page 1

Mitsubishi Electric ilmalämpöpumput korjaa ja huoltaa pääkaupunkiseudulla: Jäähdytinpalvelu RefGroup Oy

www.ilmalämpöpumput.com

Summary of Contents for MUZ-A09YV-E1

Page 1: ... MUZ A09YV MUZ A12YV MUZ A09YVH MUZ A12YVH E1 E1 E1 E1 MUZ A09YV MUZ A12YV MUZ A09YVH MUZ A12YVH E1 E1 E1 E1 Indication of model name NOTE This service manual describes technical data of the outdoor units As for indoor units MSZ A09YV and MSZ A12YV refer to the service manual OB327 As for indoor unit MCFZ A12WV refer to the service manual OB344 E1 E1 E1 HFC utilized R410A Revision A MUZ A12YV and ...

Page 2: ...fficient care 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 li...

Page 3: ...nd 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 are required for R410A refrigerant Some R22 tools can be substi...

Page 4: ...urge 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 from liquid phase of the gas cylinder If the refrigerant is cha...

Page 5: ...20 Model Winding resistance at 20 Dimensions WOHOD Weight Sound level Fan speed Fan speed regulator Refrigerant filling capacity R410A Refrigerating oil Model Thermistor RT61 at 0 Thermistor RT62 at 100 Thermistor RT64 at 50 Thermistor RT65 at 25 kW r h K h A A A 1 W mm kg dB A rpm kg cc k k k k Compressor Fan motor Special remarks Coefficient of performance C O P Capacity Electrical data MUZ A12Y...

Page 6: ...CT761 CT781 C62A C62B C61B C65 DB61 DB65 F61 F71 F801 H IPM LEV L61 R61 R831 R64A R64B SR61 TB X63 X64 X66 21S4 26H MUZ A09YVH E1 MUZ A12YV E1 MUZ A12YVH E1 ETQ19Z53AY ETQ19Z71AY 680 420V 1 8 440V D25XB60 250V 20A 250V 3 15A PS21244A CAD MD12ME 12VDC 10A 23 0mH 25m 5W 5 1 10W G3MB 3P G5N 1a G5NB 1a G4A 1A PS LD30013 Open 152 230V 130W G5N 1a G5NB 1a Open 45 230V 130W G5N 1a G5NB 1a Open 45 45m 5W ...

Page 7: ...rature 6 MUZ A09YV MUZ A09YVH E1 E1 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 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 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE COOLING FUNCTION SPL dB A LINE High FAN SPEED HEATING 47 48 Test conditions Cooling Dry bulb temperature 35 Wet bulb temperature ...

Page 8: ...t Refrigerant pipe flared 9 52 4 3 3 5 2 holes 10o21 Drain hole 33 MUZ A09 A12YVH Drain hole 42 MUZ A09 A12YV REQUIRED SPACE Basically open 100mm or more without any obstruction in front and on both sides of the unit 350mm or more 200mm or more 100mm or more 100mm or more Open two sides of left right or rear side Unit mm OUTDOOR UNIT MUZ A09YV MUZ A12YV MUZ A09YVH MUZ A12YVH E1 E1 E1 E1 Mitsubishi...

Page 9: ...TR821 T801 X63 X64 21S4 NAME CURRENT TRANSFORMER SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR DIODE MODULE SURGE ABSORBER FUSE 20A FUSE 3 15A INTELLIGENT POWER DEVICE POWER TRANSISTOR MODULE NAME EXPANSION VALVE COIL REACTOR CMC COIL COMPRESSOR OUTDOOR FAN MOTOR INNER FUSE VARISTOR DEFROST THERMISTOR DISCHARGE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR NAME AMBIENT TEMPERATURE THERMISTOR CURRE...

Page 10: ...RENT TRANSFORMER SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR DIODE MODULE SURGE ABSORBER FUSE 20A FUSE 3 15A DEFROST HEATER INTELLIGENT POWER DEVICE POWER TRANSISTOR MODULE NAME EXPANSION VALVE COIL REACTOR CMC COIL COMPRESSOR OUTDOOR FAN MOTOR INNER FUSE VARISTOR DEFROST THERMISTOR DISCHARGE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR NAME CURRENT DETECTING RESI...

Page 11: ...lary tube 3 0 2 0 200 Expansion valve Muffler Muffler MUZ A09YV MUZ A09YVH MUZ A12YV MUZ A12YVH E1 E1 E1 E1 Refrigerant Piping Max length A w Height difference should be within 12m regardless of which unit indoor or outdoor position is high w Max Height difference 12m Indoor unit Outdoor unit MAX HEIGHT DIFFERENCE MAX REFRIGERANT PIPING LENGTH Refrigerant piping Max length m A 20 Indoor unit Gas 0...

Page 12: ...fference 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 at least 2 sets of wet and dry bulb thermometers to the outdoor air intake Cover the thermometers to prevent direct rays of ...

Page 13: ...2WV E1 MUZ A12YV E1 MUZ A12YVH E1 Rated frequency 69Hz 23 1 21 3 19 5 17 8 16 0 14 2 12 4 10 7 25 4 23 4 21 5 19 5 17 6 15 6 13 7 11 7 Indoor air Dry bulb temperature difference degree Indoor intake air Dry bulb temperature Outdoor intake air Wet bulb temperature Outdoor intake air Wet bulb temperature Indoor intake air Dry bulb temperature MSZ A09YV E1 MUZ A09YV E1 MUZ A09YVH E1 Rated frequency 7...

Page 14: ...acity correction factors The operational frequency of compressor Correction of Heating total input Input correction factors The operational frequency of compressor 0 50 100 150 Hz 0 50 100 150 Hz Correction of Heating capacity Capacity correction factors The operational frequency of compressor Input correction factors MUZ A09YV MUZ A09YVH E1 E1 MUZ A09YV MUZ A09YVH E1 E1 MUZ A09YV MUZ A09YVH E1 E1...

Page 15: ...0 50 25 60 30 70 35 C 2 3 4 5 6 69Hz 32 18 Outdoor low pressure Outdoor unit current A 2 4 6 8 10 12 14 MUZ A12YV MUZ A12YVH E1 E1 Indoor unit MCFZ A12WV E1 MUZ A12YV MUZ A12YVH E1 E1 MUZ A12YV MUZ A12YVH E1 E1 Indoor unit MCFZ A12WV E1 MUZ A12YV MUZ A12YVH E1 E1 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation 1 Both indoor and outdoor unit are under the same temperature humidity cond...

Page 16: ... 0 61 583 3 08 1 88 0 61 620 3 00 1 83 0 61 637 2 88 1 75 0 61 663 3 35 1 64 0 49 610 3 23 1 58 0 49 643 3 15 1 54 0 49 663 3 05 1 49 0 49 697 3 45 1 28 0 37 643 3 35 1 24 0 37 677 3 30 1 22 0 37 697 3 20 1 18 0 37 717 2 94 2 61 0 89 536 2 81 2 50 0 89 563 2 70 2 40 0 89 590 2 60 2 31 0 89 616 3 06 2 36 0 77 563 2 94 2 26 0 77 596 2 85 2 19 0 77 610 2 75 2 12 0 77 637 3 19 2 07 0 65 583 3 08 2 00 ...

Page 17: ... 61 710 2 55 1 56 0 61 750 2 38 1 45 0 61 777 2 88 1 41 0 49 737 2 70 1 32 0 49 771 2 55 1 25 0 49 804 3 03 1 12 0 37 764 2 85 1 05 0 37 797 2 68 0 99 0 37 831 2 45 2 18 0 89 657 2 25 2 00 0 89 697 2 08 1 85 0 89 724 2 58 1 98 0 77 683 2 40 1 85 0 77 717 2 23 1 71 0 77 757 2 73 1 77 0 65 710 2 55 1 66 0 65 750 2 38 1 54 0 65 777 2 88 1 52 0 53 737 2 70 1 43 0 53 771 2 55 1 35 0 53 804 3 03 1 24 0 ...

Page 18: ... 58 1079 4 69 2 16 0 46 992 4 52 2 08 0 46 1046 4 41 2 03 0 46 1079 4 27 1 96 0 46 1134 4 83 1 64 0 34 1046 4 69 1 59 0 34 1101 4 62 1 57 0 34 1134 4 48 1 52 0 34 1166 4 11 3 54 0 86 872 3 94 3 39 0 86 916 3 78 3 25 0 86 959 3 64 3 13 0 86 1003 4 29 3 17 0 74 916 4 11 3 04 0 74 970 3 99 2 95 0 74 992 3 85 2 85 0 74 1036 4 46 2 77 0 62 948 4 31 2 67 0 62 1008 4 20 2 60 0 62 1036 4 03 2 50 0 62 1079...

Page 19: ...2 07 0 58 1221 3 33 1 93 0 58 1264 4 03 1 85 0 46 1199 3 78 1 74 0 46 1254 3 57 1 64 0 46 1308 4 24 1 44 0 34 1243 3 99 1 36 0 34 1297 3 75 1 27 0 34 1352 3 43 2 95 0 86 1068 3 15 2 71 0 86 1134 2 91 2 50 0 86 1177 3 61 2 67 0 74 1112 3 36 2 49 0 74 1166 3 12 2 31 0 74 1232 3 82 2 37 0 62 1155 3 57 2 21 0 62 1221 3 33 2 06 0 62 1264 4 03 2 01 0 50 1199 3 78 1 89 0 50 1254 3 57 1 79 0 50 1308 4 24 ...

Page 20: ...09YVH Rated frequency 75Hz E1 E1 E1 MSZ A12YV MUZ A12YV MUZ A12YVH Rated frequency 76Hz E1 E1 E1 NOTE Q Total capacity kW INPUT Total power input W DB Dry bulb temperature WB Wet bulb temperature CAPACITY 3 9 kW INPUT 1080 W 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 15 2 46 702 2 96 842 3 47 950 3 98 1026 4 49 1091 4 95 1123 5 46 1145 21 2 34 75...

Page 21: ...tuator 9 3 Relation between main sensor and actuator 9 2 R V coil control Heating ON Cooling OFF Dry OFF NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor ON OFF ON OFF Outdoor fan motor Compressor 5 seconds 15 seconds ON OFF Compressor Outdoor fan motor R V coil ON OFF ON OFF COOL 5 seconds HEAT 5 seconds 9 1 Outdoor fan motor control The AC fan motor turns ON OF...

Page 22: ...scoloration 4 When troubleshooting refer to the flow chart on page 23 and check table on page 24 11 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 s...

Page 23: ...e Indoor unit Trouble of indoor fan motor Left lamp 5 time flash Cause Outdoor unit Outdoor power system abnormality Left lamp 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Left lamp 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer to N How to check of mis wiring and serial signal error When outdoor unit doesn t work on page 31 MSZ type Both lamps Lef...

Page 24: ...tion Fin temperature thermistor overheat protection High pressure protection Frequency drop by current protection Frequency drop by high pressure protection Frequency drop by defrosting in COOL mode Frequency drop by discharge temperature protection Low discharge temperature protection Check stop valve Reconnect connectors Refer to A How to check inverter compressor on page 26 Refer to G Check of ...

Page 25: ...arm it up Part temperature 0 C 40 C Normal 150 k 600 k 30 k 180 k Abnormal Open or short circuit Normal 5 k 65 k Abnormal Open or short circuit Defrost thermistor RT61 Fin temperature thermistor RT64 Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Part temperature 0 C 40 C Normal Abnormal Open or short circuit Ambient temperature thermistor...

Page 26: ...between terminals Operation method Start cooling or heating operation by pressing the EMERGENCY OPERATION switch on the indoor unit test run mode refer to page 14 Measurement point at 3 points BLK U WHT V BLK U RED W WHT V RED W NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During this check LED of inverter P C board flashes 9 times Di...

Page 27: ... current Judgement For reference 0 10 seconds Abnormal compressor short 10 60 seconds Abnormal compressor lock out 60 seconds 5 minutes Abnormal refrigerant circuit defect more than 5 minutes Normal w Measure the resistance between the lead wires at 3 points Outdoor fan starts Abnormal Compressor winding short or layer short Abnormal Compressor lock out Abnormal Refrigerant circuit defect etc Norm...

Page 28: ...1 and 2 Ambient temperature thermistor RT65 Check of R V coil H Disconnect connector CN61 between compressor and power transistor module Turn ON the power supply and press the EMERGENCY OPERATION switch twice HEAT mode Is there 230V AC between CN7211 and 2 on the power P C board 3 minutes after the power supply is turned ON Yes No Replace the power P C board Replace the 4 way valve Disconnect conn...

Page 29: ...indoor electronic control P C board Replace the outdoor fan motor No Yes Indoor outdoor connecting wire Disconnect the connector CN61 between compressor and power transistor module Turn ON power supply and press the EMERGENCY OPERATION switch Check the electric parts in main circuit Ok If flash refer to page 24 3 minutes after power ON is there voltage of 230V AC between outdoor terminal block 2 a...

Page 30: ...n 2 First release the RESET button And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds 1 During pressing both the OPERATION SELECT button and the TOO COOL button on the remote controller at the same time press the RESET button 2 First release the RESET button And release the other two buttons since all LCD in operation ...

Page 31: ...and 3 after 3 minutes for confirmation of serial signal 1 Turn OFF the power supply 2 Disconnect the connector CN61 between the compressor and the power transistor module 3 Turn ON the power supply 4 Press the EMERGENCY OPERATION switch No Yes No Yes light up or OFF Is mis wiring indicated when the contactor 52C on the indoor electronic control P C board turns ON 3 minutes later Yes No Turn OFF in...

Page 32: ...Back side of unit Front side of unit 280V 370V DC 230V AC 20 10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature Ambient temperature thermistor RT65 Defrost thermistor RT61 Temperature Discharge temperature thermistor RT62 0 10 20 30 40 50 60 70 80 90 100 110 120 0 100 200 300 400 500 600 700 0 10 20 30 40 50 60 70 80 0 20 40 60 80 100 120 140 160 180 200 Temperature Fin temperature ther...

Page 33: ...drive outdoor fan motor CN771 230V AC Heater connector CN722 230V AC 230V AC Back side of unit MUZ A09YVH MUZ A12YVH MUZ A09YV MUZ A12YV MUZ A09YVH MUZ A12YVH E1 E1 E1 E1 Front side of unit Mitsubishi Electric ilmalämpöpumput korjaa ja huoltaa pääkaupunkiseudulla Jäähdytinpalvelu RefGroup Oy www ilmalämpöpumput com ...

Page 34: ...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 lock mechanism detach the terminal as shown below There are two types Refer to 1 and 2 of the terminal with lock mechanism The terminal with no lock mechanism can be removed by pulling it out Check the shape of the terminal and work Terminal with lock mech...

Page 35: ...he inverter assembly Photo 3 7 Disconnect all connectors and lead wires on the inverter P C board Photo 4 8 Remove the inverter P C board from the inverter assembly 9 Remove the screw fixing the power P C board Photo 4 10 Disconnect all connectors and lead wires on the power P C board 11 Remove the power P C board from the inverter assembly E1 Photo 3 Photo 4 Screw of the power P C board Heat sink...

Page 36: ...and remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the discharge temperature thermistor from its holder Photo 5 Photo 5 Photo 6 Defrost thermistor Discharge temperature thermistor R V coil Mitsubishi Electric ilmalämpöpumput korjaa ja huoltaa pääkaupunkiseudulla Jäähdytinpalvelu RefGroup Oy www ilmaläm...

Page 37: ...fer to 1 2 Disconnect the indoor outdoor connecting wire and remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Recover gas from the refrigerant circuit 5 Detach the welded part of the suction and the discharge pipe connected with compressor 6 Remove the nuts of compressor legs 7 Remove the compressor 8 Detach the welded part of pipes conneced with 4 way valve Photo 8 NOT...

Page 38: ...1 E02 838 293 E02 840 293 E02 838 515 E02 838 523 E02 838 297 E02 838 630 E02 839 630 E02 838 301 E02 840 526 E02 840 381 E02 282 937 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 KNB073FBVH KNB092FAAH 3RUBBERS SET 9 52 6 35 RA6V21 3 0 2 0 200 MC MC LEV MF H 26H 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

Page 39: ...1 E02 839 451 1 2 3 4 5 6 7 8 9 Symbol in Wiring Diagram Q ty unit DEFROST DISCHARGE 250V 20A 3P Including heat sink and RT64 Including heat sink and RT64 Remarks Part No No Part Name L61 21S4 RT61 RT62 RT65 F61 TB 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 1 1 1 MUZ A09YV E1 MUZ A09YVH E1 MUZ A12YV E1 MUZ A12YVH E1 MUZ A09YV MUZ A12YV MUZ A09YVH MUZ A12YVH E1 E1 E1 E1 2 3 5...

Page 40: ... OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN C C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Apr 2004 No OB328 REVISED EDITION A 6 Distributed in Jan 2004 No OB328 6 Made in Japan New publication effective Apr 2004 Specifications subject to change without notice 1 Mitsubishi Electric ilmalämpöpumput korjaa ja huoltaa pääkaupunkiseudulla Jää...

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