Home

SERVICE MANUAL MUZ-A09YV - MUZ-A12YV

1. NOTE The unit of pressure has been changed to MPa on the international system of units SI unit system The conversion factor is 1 MPa Gauge 10 2 kgf cm Gauge 14 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Dry bulb temperature Relative humidity Both indoor and outdoor unit are under the _ __ _ same temperature humidity condition Air flow High speed Operational frequency 57Hz MUZ A09YV MUZ A09YVH 69Hz MUZ A12YV MUZ A12YVH MUZ A09YV E1 MUZ A12YV MUZ A12YV E1 MUZ AO9YVH 51 MUZ A12YVH E1 MUZ A12YVH Indoor unit Indoor unit MSZ A12YV E1 MCFZ A12WV E1 kgf cm Gauge MPa Gauge Gauge PR Gauge kgf cm Gauge MPa Gaugel 14 14r 1 14 2 12 2 12 2 12 D 9 D 5 10 210 i 5 8 2 9 8 26 56 56 4 4 4 2L 0 2 2 15 1820 25 30 32 35 C 15 1820 25 30 32 35 50 60 70 96 50 60 70 96 Ambient temperature C Ambient humidity 76 Ambient Ambient humidity 96 Ambient temperature C Ambient humidity 96 MUZ AO09YV E1 MUZ A12YV E1 MUZ A12YV
2. h 7 7 Ej I Q 2 S N 2 ANA Pas vV A C1 O N Part number that 15 circled is not shown in the illustration Q ty unit Part Name in Wiring MUZ MUZ MUZ MUZ 09 A09YVH A12YV A12YVH Diagram ej E02 838 290 BASE E02 840 290 BASE 7 7 19 02 838 301 OUTDOORFANMOTOR 1 1 1 1 BASAL 20 E02 840 526 DEFROSTHEATER 1 1 21 02 840 381 HEATER PROTECTOR 1 S SO 22 E02 282 937 CAPILLARY TUBE 1 1 1 1 5022020 _ NBO73FBVH 1 1 1 1 1 1 1 1 3 1 1 1 O3 1 ___ 1 1 1 1 K 1 1 2 3 3 3 3 1 1 1 1 3 1 1 1d 1 1 1 1 31 1 1 1 1 1 1 31 1 1 1 1 1 1 141 303 14 ____ 111 j 1 1 1 1 1 3 1 1 1 3 1 1 1 __ 1 1 9 3 en E MUZ A09YV MUZ A12YV Em MUZ A09YVH MUZ A12YVH 13 2 OUTDOOR UNIT ELECTRICAL PARTS m Symbol Quit ____ Quit ____ Part Name in Wiring MUZ MUZ MUZ cd auci iis REACTOR L61 E02 840 444
3. MUZ A12YV E1 i back and side a MUZ AO9YV gt w w w w w E gt MUZ A09YV MUZ A12YV 1 MUZ A12YV 1 MUZ AO9YVH E1 MUZ A12YVH 1 MUZ A12YVH t Outdoor model Indoor model Indoor model Indoor model 57 09 MSZ A12YV MCFZ A12WV Function Cooling Heating Cooling Heating Cooling Heating Single phase Single phase Single phase 230V 50Hz 230V 50Hz 230V 50Hz 2 5 0 9 3 2 0 9 5 0 3 5 1 0 4 1 4 0 0 9 6 0 3 5 1 0 4 1 3 9 0 9 5 9 1900 1900 1900 3 2 0 9 5 0 2 89 4 Electrical oeffisient of performanoe C O P 1 850 Winding U V 1 53 U W 1 53 U V 0 49 U W 0 49 U V 0 49 U W 0 49 resistance at 20 C V W 1 53 V W 0 49 V W 0 49 RA6V21 AA RA6V21 AA RA6V21 AA inding WHT BLK 347 WHT BLK 347 WHT BLK 347 resistance at 20 BLK RED 281 BLK RED 281 BLK RED 281 Dimensions WxHxD mm 0 550 285 800 550 285 800 550 285 47 8 O c C LL Compressor motor 47 48 rpm 825 I c capacity R410A 7 7 0 hermistor RT64 at 50 C Thermistor RT65 at 25 C NOTE Test conditions are based on ISO 5151 Cooling Indoor DB27C WB 19C Outdoor DB 35C WB 24C Heating Indoor DB20C WB15C Outdoor DB 7C WB 6C Refrigerant piping length one way 5m 1 Measured under rated operating frequency x C O Specifications and rating conditions of main electric parts OUT
4. 5 Ysa JLVLS 1105 1995 HOSS3HdWOO 9980 1988 eben HOLSIS3H rou vrou 91 291 HOOGLNO 990 pje 204 uo s olonpuoo 1eddoo sfz HOLSISSY 5NILO313Q0 LN3HHfIO ESH LOU HOlOV3H 191 ONIHLOONS 8 089 0 BUIDIAIOS HOLSINYSHL 8919 1100 JAYA 5 AJI 0 9 IN3HHnO 1919 21 19404 epis eui NOY lOSWAS JINVN lOSWAS lOSWAS 7 18 1919 9914 rn 0 d H3MOd x lt FEI 5 x x lt 008NO O d H31H3ANI EP et M L x H 2 12881 Losol 3 pM E 2 A 18419 au MANIS NIL LLI N 8190 vzao fid Os tZ aa ia E ON i 05 4 OL n x LEE tz om _ yg EIE NU mm BEES nn 197 E gt gt gt 5 N xr O N N 22 10128uuo5 JHOIsiWNH3HLI3HRIVH3dWSLINSIEW 9949 INGON HOISISNVHLH3MOd HOlO31OHd H3lV3H 4 v91H 3OlIA3Q H3MOd LNADITIALNI 10801 OoowHu 51
5. _____________ i 1 OSO IO O01 a 4 E02 838 306 THERMISTOR SET 62 1 1 1 DEFROST DISCHARGE 5 E02 838 308 AMBIENTTEMPERATURETHERMISTOR RT65 1 1 1 1 6 E02 735 241 FUSEHOLDER 1 1 1 1 7 E02 735 382 1 1 1 1 2520 8 E02 838 374 TERMINAL BLOCK TB 1 1 1 1 DEA PME UN E02 839 451 INVERTERPC BOARD 1 171 clung heat sink and RT 39 x C O MUZ A09YV MUZ A12YV 13 3 DRAIN SOCKET rm Outdoor unit 242 drain hole Soft vinyl chloride hose of 25mm inside diameter Symbol Q ty unit Parts Name in Wiring Diagram MUZ A09YV 1 MUZ A12YV E1 1 02 838 704 DRAIN SOCKET ___ 1 1 a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Apr 2004 No OB328 REVISED EDITION A 6 Distributed in Jan 2004 No OB328 6 New publication effective Apr 2004 Made in Japan opecifications subject to change without notice
6. 2918 e 9 __ HOLSISNVHL H3MOd ONIHOLIMS Lz8 L 303 YANNI HOLOW NY4 HOOGLNO 3ouns xOO18VNIAH3L L HOSS3Hdl OO JINGOW aqolq 5980 1980 CD jeuuuue 20 1 16 anos 19 5 OWO 891291 990 E HOLSIS3H ONLLIWIT LN3HHI1O Vrrou HOIOV3H 191 HOLIOWdWO DNIHLOOWS 819782901290 MUZ A09YVH m MODELS WIRING DIAGRAM MUZ A12YVH Jo 21 eui epis eui 11097 LILON HOLSISSY 0 1 1100 IMYA NOISNVdX3 A31 I8 194910 8 T 918 94914 222 E TE P C C C CC ai o d IP9NO 6 9 Tate rona ie 1 fa O d H31H3ANI eeu E S H ana go nz t 99X x T quu i ZV ves i i AT 10801 eon ed 9 Il imc MR MANNED ONL A 7 S3NNO9 x N s Ts 90 290 qaq Acl LINA O lt 4 QUE QUE m8 BOO INE N Que OUTDOOR UNIT CQ uA ERR TERRE w ee ana URN Quan 10 REFRIGERANT SYSTEM DIAGRAM
7. R V coil 21S4 Part temperature 15 C 40 C 341 Q 427 Open short circuit 25 x C O When OPERATION INDICATOR lamp flashes 5 time Outdoor unit does not operate A How to check inverter compressor Disconnect the connector CN61 between compressor and power transistor module IPM Check the voltage between terminals See Check of open phase on page 26 NO Are the voltages Check the resistance of power transistor balanced module See Check of power transistor module on page 26 Yes bad See Check of compressor on page 27 compressor Yes Is the resistance infinite Replace the inverter P C board No Q Replace the inverter P C board and compressor Check of open phase e With the connector between compressor and power transistor module disconnected activate the inverter and check if the inverter is normal by measuring the balance of voltage between terminals Output voltage V 115V lt lt Operation method gt gt Start cooling or heating operation by pressing the EMERGENCY OPERATION switch on the indoor unit test run mode refer to page 14 lt lt Measurement point gt gt Inverter P C board at 3 points BLK U WHT V BLK RED Measure AC voltage between WHT V RED W the lead wires at 3 points NOTE 1 Output voltage var
8. 1 09 0 49 257 2 45 1 59 0 65 2 25 1 46 0 65 2 08 1 35 0 65 2 58 1 36 0 53 2 40 1 27 0 53 2 23 1 18 0 53 c 273 1 12 0 41 2 55 1 05 0 41 2 38 0 97 0 41 777 HH 2 45 2 25 1 55 0 69 2 08 1 43 0 69 724 23 20 258 23 22 2 m 2 40 1 37 0 57 2 23 1 27 0 57 757 777 24 18 724 24 20 757 24 22 777 24 24 25 18 25 20 25 22 25 24 26 18 26 20 26 22 26 24 26 26 27 18 27 20 27 22 27 24 27 26 28 18 28 20 28 22 28 24 28 26 29 18 29 20 29 22 29 24 29 26 30 18 30 20 30 22 30 24 30 26 31 18 HH 32 NOTE B EE capacity KW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity kW INPUT Total power input W WB Wet bulb temperature 710 17 x C ZI PERFORMANCE DATA COOL operation Rated frequency 69Hz MSZ A12YV MCFZ A12WV MUZ A12YV n MUZ A12YVH CAPACITY 3 CAST st SHF 0 76 INPUT 1090 W OUTDOOR DB C EN WB C Q sec see nur Q SHC SHF INPUT EX ME 916 3 78 2 19 0 58 959 3 64 12 11 10 58 1003 Fi 9 0 3 99 1 84 0 46 992 3 85 1 77 0 46 1036 77 e 2 06 0 50 1 64 0 38 2 60 0 66 2 22 0 54 1 81 0 42 3 78 2 34 0 62 959 3 64 2 26 0 62 1003 3 99 2 00 0 50 992 3 85 1 93 0 50 1036 4 20 1 60 0 38 1036 4 03 1 53 0 38 1079 3 78 2
9. 4 time flash Cause Indoor unit Trouble of indoor unit control system Replace the indoor electronic control P C board 23 Left lamp 5 time flash Outdoor unit Refer to Check of inverter compressor on page 26 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Refer to Check of outdoor thermistors on page 28 As for indoor unit MCFZ type refer to service manual OB344 Left lamp 7 time flash Cause Outdoor unit Trouble of outdoor control system Replace the inverter P C board 1 Troubleshooting check table Inverter P C board NOTE 1 The location of LED is illustrated at the right figure Refer to page 32 LED V 2 LED lights up during normal operation Flashing e Symptom LED indication Abnormal point Condition Detection method Checkpoint Outdoor unit 1 time flash every Outdoor power When compressor has stopped by overcurrent protection within Check stop valve 1 minute 3 times in a row after compressor start up unit stops Reconnect connectors 2 5 seconds P P p Refer to How to check inverter compressor on page 26 NOTE Outdoor When discharge temperature thermistor fin temperature Refer to Check of outdoor For abnormality thermistors thermistor or defrost thermistor shorts or opens during thermistors on page 28 location refer to compressor running compressor stops and restarts
10. CN642 and CN643 from the inverter P C board Defrost thermistor RT61 Check the characteristics of each thermistor Measure the resistance between CN641 D Reconnect the O and connectors CN641 CN642 and CN643 Disconnect the Discharge connector between temperature the compressor and thermistor RT62 power transistor Measure the module resistance Replace the inverter between CN641 P C board and Turn ON the Does the resistance of the thermistor have the power supply and Yes press the Does the unit operate 10 minutes Fin temperature I Ter EMERGENCY characteristics on 2 thermistor RT64 page 322 OPERATION or Measure the No switch Yes resistance between CN642 Replace the Is LED of the thermistor except RT64 In case of RT64 replace the inverter P C and inverter P C board flashes 5 times Yes Ambient temperature thermistor RT65 Measure the resistance between CN643 O and H Check of R V coil First of all measure the resistance of R V coil to check if the coil is defective refer to page 25 In case CN721 is not connected or R V coil is open voltage is generated between the terminal pins of the connector although any signal is not being transmitted to R V coil Check if CN721 is connected Unit operates COOL mode even if it is set to HEA
11. KW INPUT Total power input W WB Wet bulb temperature 19 N N PN N YK IS NNN DD CO CO CO CO CO 02 N xl C ZI PERFORMANCE DATA HEAT operation MSZ A09YV MUZ A09YV Rated frequency 75Hz CAPACITY 3 2 KW INPUT 840 W up ae dar un C Ld p pum ARE CORR UE EI a 2 02 546 2 43 655 2 85 739 3 26 798 3 68 848 4 06 1 92 588 2 30 697 2 72 773 13 10 832 3 52 874 3 90 4 30 1 73 630 2 14 739 2 53 815 2 94 874 3 36 916 13 74 4 16 NOTE Q Total capacity kW INPUT Total power input W Dry bulb temperature WB Wet bulb temperature MSZ A12YV MUZ A12YV MUZ A12YVH E Rated frequency 76Hz CAPACITY 4 0 kW INPUT 1080 W NE RD 5 WB M md Pm uam e Ex INPUT 2 52 702 3 04 842 3 56 ey 4 08 1026 14 60 1091 5 08 1123 5 60 1145 2 40 756 2 88 896 3 40 3 88 1069 4 40 1123 4 88 1156 5 38 1199 2 16 810 2 68 950 3 16 3 68 1123 14 201 1177 14 68 1210 5 20 1242 NOTE Q Total capacity kW INPUT Total power input W Dry bulb temperature WB Wet bulb temperature MCFZ A12WV MUZ A12YV MUZ A12YVH Rated frequency 76Hz CAPACITY 3 9 kW INPUT 1080 W x SUIDOOR WB
12. MUZ A09YV Unit mm MUZ A09YVH E MUZ A12YV MUZ A12YVH OUTDOOR UNIT Refrigerant pipe 29 52 4 way valve with heat insulator SS mn Stop valve 7 with service port Flared connection temperatuer i Muffler exchanger thermistor RT62 Compressor Defrost Ambient thermistor Temperature RT61 Thermistor u RT65 Strainer Flared connection Expansion N valve 2S R V coil gt lt MI heating ON cooling tube Refrigerant pipe Stop valve 26 35 with strainer 3 0X92 0X200 with heat insulator Refrigerant flow in cooling Refrigerant flow in heating MAX REFRIGERANT PIPING LENGTH Refrigerant piping Max length m Outdoor uni MUZ AO9YV MUZ A09YVH Gas 0 43 MUSAE ES 20 9 52 6 35 MUZ A12YVH MAX HEIGHT DIFFERENCE Piping size O D mm Length of connecting pipe m Max Height difference 12m Refrigerant Piping Max length A Outdoor unit Height difference should be within 12m regardless of which unit indoor or outdoor position is high x C NN ADDITIONAL REFRIGERANT CHARGE R410A g s unit Refrigerant piping length one T pei 12m 13m 14m 15m MUZ AO9YV E1 MUZ A09YVH E1 MUZ A12YV MUZ A12YVH E1 Calculation Xg 30g mx Refrigerant length m 8 PERFORMANCE
13. O O 1 Indoor coil temperature thermistor Cooling Coil frost prevention Heating High pressure protection Heating Defostng O O Fintemperature hemistor O O Ambient temperature thermistor O O Feaing Detosing 21 MUZ AO9YV MUZ A12YV MUZ AO9YVH Een MUZ A12YVH E7 CHANGE IN DEFROST SETTING lt JS gt When the JS wire of the outdoor Inverter P C board is cut soldered the defrost finish temperature is changed Refer to page 32 Defrost finish temperature umper wire Initial setting MUZ AO9YVH E1 Serial number 4000531 MUZ A12YVH E1 Serial number 4000211 MUZ AO09YV 1 soldered 5 MUZ A09YVH Serial number 4000530 MUZ A12YVH i Serial number 4000210 11 TROUBLESHOOTING MUZ A09YV n MUZ A12YV En MUZ A09YVH m MUZ A12YVH 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 stop the main unit and then after confirming 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
14. O O 0 0 0 0 0 0 0 50 100 150 Hz O 50 100 150 Hz O 50 100 150 Hz 0 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor MUZ A12YV 1 MUZ A12YV 51 MUZ A12YV 51 MUZ A12YV MUZ A12YVH et MUZ A12YVH MUZ A12YVH E1 MUZ A12YVH ei Indoor unit Indoor unit Indoor unit Indoor unit MSZ A12YV MSZ A12YV MSZ A12YV Ei MSZ A12YV Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input 1 5 0 2 0 e Capacity correction factors Input correction factors Capacity correction factors Input iic factors 0 0 0 0 0 0 0 0 0 50 100 150 Hz O 50 100 150 Hz 0 50 100 150 Hz O 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor MUZ A12YV 1 MUZ A12YV 51 MUZ A12YV 51 MUZ A12YV 1 MUZ A12YVH 1 MUZ A12YVH MUZ A12YVH E1 MUZ A12YVH zi Indoor unit Indoor unit Indoor unit Indoor unit MCFZ A12WV MCFZ A12WV m MCFZ A12WV m MCFZ A12WV m Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Co
15. board Pattern side 29 Outdoor unit does not operate at all or stops immediately due to over current Check of current limiting resistor When the current limiting resistor is open the rush current limiting relay X64 may not work properly Start Does current limiting resistor R64 detect 100 Replace the power P C board Heating Cooling does not work sufficiently D Check of LEV Expansion valve Turn ON the power supply During pressing both the OPERATION SELECT button and the TOO COOL button on the remote controller at the same time press the RESET button 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 During pressing both the OPERATION SELECT button and the TOO COOL button on the remote controller at the same time press the RESET button 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 With remote controller set toward the indoor unit press the OPERATE STOP ON OFF button and confirm one beep tone Do you feel the expansion valve vibrate on touching it No Is LEV properly fixed to the expansion valve Yes Does the resistance of LEV have the characteristics on page 25 No Replace the LEV NOTE After check o
16. the top panel and the electronic control P C board 3 When removing the electrical parts be careful to the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X O 15 Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to 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 check 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 discoloration 4 When troubleshooting refer to the flow chart on page 23 and check table on page 24 22 11 2 Instruction of troubleshooting Indoor unit operates Outdoor unit doesn t Indoor unit doesn t receive the signal from remote controller OPERATION INDICATOR lamp on the indoor unit is flashing on and off Indoor unit operates Outdoor unit doesn t operate normally operate Outdoor unit Operates in only Test Operation Out
17. 2 94 1 91 0 65 22 20 3 06 1 62 0 53 563 2 94 1 56 0 53 596 2 85 1 51 0 53 610 2 7 5 1 46 0 53 637 22 22 3 1911 3110 41 583 3 08 1 26 0 41 620 3 00 1 23 0 41 637 2 88 1 18 0 41 663 23 18 2 94 2 03 0 69 536 0 69 563 2 70 1 86 0 69 590 2 60 1 79 0 69 616 23 20 3 06 1 563 0 57 596 2 85 1 62 0 57 610 2 75 1 57 0 57 637 23 22 583 620 637 663 24 18 536 563 590 616 24 20 563 596 610 637 24 22 583 620 637 663 24 24 610 643 663 697 25 18 536 563 590 616 25 20 563 596 610 637 25 22 583 620 637 663 25 24 610 643 663 697 26 18 536 563 590 26 20 563 596 610 26 22 583 620 637 26 24 610 643 663 26 26 643 677 697 27 18 27 20 27 22 27 24 27 26 28 18 28 20 28 22 28 24 28 26 29 18 29 20 29 22 29 24 29 26 30 18 30 20 30 22 30 24 30 26 31 18 31 20 31 22 31 24 31 26 32 18 590 32 20 610 32 22 637 32 24 663 32 26 NOTE Q Total capacity kW SHF Sensible heat factor SHC Sensible heat capacity kW Total power input W WB Wet bulb temperature 16 PERFORMANCE DATA COOL operation Rated frequency 57Hz MSZ A09YV MUZ A09YV MUZ A09YVH 2 5 SHF 0 79 INPUT 670 W OUTDOOR DB C 35 DB WB O o Tec ne INPUT G Tec ne NBUT INPUT HH CHE 2 58 1 26 0 49 2 40 1 18 0 49 223
18. 3 minutes later Indoor troubleshooting Outdoor control When nonvolatile memory data cannot be read properly Replace inverter P C board after check table system compressor stops and restarts 3 minutes later check of How to check inverter Refer to service compressor on page 26 and manual OB327 Check of outdoor thermistors on page 28 When the bus bar voltage of inverter cannot be detected Refer to How to check inverter normally compressor on page 26 Bus bar voltage 2 time flash Overcurrent When 12A MUZ A09YV MUZ AO9YVH 20A MUZ A12YV Check stop valve 2 5 seconds OFF protection MUZ A12YVH current flows into power transistor module Reconnect connectors Refer to How to check inverter compressor stops and restarts 3 minutes later compressor on page 26 Outdoor unit stops and restarts 3 minutes later is repeated 3 time flash Discharge When discharge temperature thermistor exceeds 116 C Check refrigerant circuit and 2 5 seconds OFF temperature compressor stops Compressor can restart if discharge refrigerant amount overheat temperature thermistor reads 100 C or less 3 minutes later Refer to Check of outdoor protection thermistors on page 28 Refer to O Check of LEV on page 30 4 time flash Fin temperature When temperature at heat sink exceeds 83 C or temperature of Check around outdoor unit 2 5 seconds OFF thermistor overheat inverter P C b
19. C ECC E CHE mI CHE NU eee ee NI DEC 2 46 702 2 96 842 13 471 950 3 98 1026 4 49 1091 14 95 1123 5 46 1 us 2 34 756 2 81 896 3 32 994 3 78 1069 4 29 1123 4 76 1156 5 25 1199 2 11 810 12 611 950 3 08 1048 3 59 1123 4 10 1177 4 56 1210 5 07 1242 NOTE Q Total capacity kW INPUT Total power input W Dry bulb temperature WB Wet bulb temperature 20 9 ACTUATOR CONTROL MUZ A09YV n MUZ A12YV MUZ A09YVH MUZ A12YVH E 9 1 Outdoor fan motor control The AC fan motor turns ON OFF interlocking with the compressor ON The AC fan motor turns ON 5 seconds before the compressor starts up OFF The AC fan motor turns OFF 15 seconds after the compressor has stopped running 5 seconds 15 seconds ON 4 iy Compressor OFF ON Outdoor fan motor OFF 9 2 coil control Heating DUE EUREN AES ON sc Bees OFF Dry NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor lt COOL gt lt HEAT gt 5 seconds 5 seconds ON L E E Compressor OFF R V coil ON p OFF Outdoor fan ON motor OFF 9 3 Relation between main sensor and actuator Actuator Sensor Purpose Outdoor Indoor Defrost Compressor LEV an oo heats Discharge temperature thermistor Protection
20. E1 MUZ AO9YVH 1 MUZ A12YVH E1 MUZ A12YVH E1 Indoor unit Indoor unit MSZ A12YV E1 MCFZ A12WV 1 lt xc lt lt 3 O E E 8 O 2 15 1820 25 3032 35 45 1820 25 3032 35 45 1820 25 3032 35 50 60 70 90 50 60 70 50 60 70 Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity 96 Ambient temperature C Ambient humidity 96 HEAT operation Condition indoor Dry bulb temperature 20 09 Wet bulb temperature 14 5 C Condition outdoor Dry bulb temperature 2 7 15 20 0 C Wet bulb temperature 1 6 12 14 5 C MUZ AO09YV E1 MUZ A12YV MUZ A12YV E1 MUZ AO9YVH E1 MUZ A12YVH E1 MUZ A12YVH 1 Indoor unit Indoor unit MSZ A12YV 1 MCFZ A12WV E1 Outdoor unit current A Outdoor unit current A Outdoor unit current A 2 5 10 15 20 25 Ambient temperature C Ambient temperature 15 0 2 Ambient temperature PERFORMANCE DATA COOL operation Rated frequency 57Hz MSZ A09YV m MUZ A09YV m MUZ AO9YVH E7 CAPACITY 2 5 kW SHF 0 79 670 OUTDOOR DB C INDOORIINDOOR 21 DB C WB C suc sur iNPUT sHc sHE INPUT o SHC SHF INPUT SHC SHF INPUT 21 20 3206 11 50 0 49 563 294 144 049 596 2 85 1 40 0 49 610 275 1 35 0 49 637 536 563 2 81 1 83 0 65 2 70 1 76 0 65 590 2 60 1 69 0 65 616 22 18
21. tester Part temperature 15 40 C 5 65 Open short circuit Ambient temperature thermistor RT65 Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Discharge temperature Part temperature 0 C 40 C 150 600 Open short circuit Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Fin temperature Part temperature 0 C 40 C 30 180 Open short circuit Measure the resistance between the terminals with a tester Part temperature 15 C 40 C Compressor MC MUZ AO9Y V MUZ A12YV Abnormal MUZ A09YVH MUZ A12YVH U V n 1 310 1 660 0 42 Q 0 53 Q ha circuit Measure the resistance between the terminals with a tester Outdoor fan motor MF Part temperature 15 C 40 C INNER FUSE Color of lead wire Abnormal 152 3 C CUT OFF WHT BLK 299 Q 3740 Open or BLK RED 242 Q 3040 short circuit Measure the resistance between the terminals with a tester Part temperature 15 C 40 C 1 90 2 39 Open or short circuit Measure the resistance with a tester Part temperature 15 C 40 C Color of lead wire LEV Expansion valve WHT RED RED ORN Open or YLW BRN 39 Q 50 Q short circuit BRN BLU Measure the resistance with a tester BLK RED WHT
22. the power power P C board 0V DC Refer to page 33 P C board No Replace the inverter P C board 230V AC 30 When OPERATION INDICATOR lamp flashes ON and OFF in every 0 5 second Outdoor unit doesn t operate N How to check mis wiring and serial signal error when outdoor unit does not work After 3 minutes mis wiring is indicated 0 5 second ON 0 5 second OFF on OPERATION INDICATOR lamp on indoor unit Is there any mis wiring poor contact or wire disconnection 2 Make them sure Turn OFF the power supply Disconnect the indoor outdoor connecting wire Short circuit indoor terminal block NI and Turn ON the power supply During pressing both the OPERATION SELECT button and TOO COOL button on the remote controller at the same time press the RESET button At 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 Transmit the signal of remote controller pressing OPERATE STOP ON OFF button on the remote controller The above procedure allows OPERATION INDICATOR lamp to indicate the failure mode The following indication applies regardless of shape of the indicator Blinking Y Short circuit of J
23. 12WV E1 Some mistakes were corrected 1 TECHNICAL CHANGES INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT This room air conditioner adopts an HFC refrigerant R410A which never destroys the ozone layer Pay particular attention to the following points though the basic installation procedure is same as that for R22 air conditioners As 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 storage and installation since it is more susceptible to contaminations than R22 For refrigerant piping use clean pressure proof parts materials specifically designed for R410A Refer to 2 Refrigerant piping Composition change may occur in R410A since it is a mixed refrigerant When charging charge liquid refrigerant to prevent composition change Previous regen HFC 32 HFC 125 50 50 R22 100 Refrigerant handing Safety group ASHRAE Boling point C Steam pressure 25 C Mpa SewaedstamdensypSC Kgm 64 444 Combustibiiy GWP Refrigerant charge method Refrigerant 64 Additional charge on leakage T Color Smel Ozone Destruction Parameter based on CFC 11 2 Global Warmth Parameter based on New Specific
24. 252 0222 022Z 2 2 50 2 222r Heating capacity Total input heating 23 1 294 232 A Sum ssp EB S j j ET 19 5 245 red SON na p 2 e T POLEN gun i c LL as 178 19 5 151 5 T T Eras 5 460 NE SIN mu vw segi T 5 88 241 Esas G EI e p det 10 6 7 8 as almum mm S 407 11 7 9 1 e eee i j Atti lll p e pepe SES es F Fes 10 5 0 5 0 15 10 5 0 5 10 15 Fi a fe F d ud ro Outdoor intake air Wet bulb temperature C Outdoor intake air Wet bulb temperature gt gt 55 2250 255 gt gt gt 5 gt gt gt 5 amp gt gt 5 I 2222 NOTE The above curves are for the heating operation without any frost lt fide LIIE atte NNN m NNN m LL N N m 0222 0222 0558 zzj 5 57 SEES 13 MUZ A09YV E1 MUZ A09YV E1 MUZ AO9YV E1 MUZ AO09YV E1 MUZ AO9YVH MUZ AO9YVH 1 2 1 MUZ AO9YVH 1 Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input 1 5 2 0 2 0 2 9 9 o 8 8 81 5 81 5 5 1 0 6 L 2 21 0 81 0 2 gt S 0 5 3 3 90 5 505
25. 49 0 66 959 3 64 12 40 0 66 1003 3 99 2 15 0 54 992 3 85 12 08 0 54 1036 4 20 1 76 0 42 0 42 1079 4 11 4 29 NOE e TE capac kW SHF Sensible heat factor DB Dry bulb iempersire SHC Sensible heat capacity kW INPUT Total power input W WB Wet bulb temperature 18 PERFORMANCE DATA COOL operation Rated frequency 69Hz MSZ A12YV MCFZ A12WV 2 MUZ A12YV n MUZ A12YVH 3 5 SHF 0 76 INPUT 1090 W OUTDOOR DB C INDOOR 35 IWB sHc sHF_ es S INPUT Q SHC SHF NEU 3 15 1134 2 91 1 68 0 5 3 36 1166 13 12 1 43 0 4 69 O CO v 112 1 55 NE N NO N 3 61 1 80 0 50 1112 3 36 1 68 0 50 1166 3 12 1 56 0 50 1232 3 82 1 45 0 38 1155 3 57 1 36 0 38 1221 3 33 1 26 0 38 1264 3 43 2 26 0 66 1068 3 15 2 08 0 66 1134 2 91 1 92 0 66 1177 3 61 1 95 0 54 1112 3 36 1 81 0 54 1166 3 12 1 68 0 54 1232 3 82 1 60 0 42 1155 3 57 1 50 0 42 1221 3 33 1 40 0 42 1264 NO NO 2 13 0 62 1068 3 15 1 95 0 62 1134 2 91 1 80 0 62 1177 r MP PNM IN G C 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 31 32 32 32 32 es a capacity kW SHF Sensible heat factor Dry bulb temperature SHC Sensible heat capacity
26. CURVES MUZ A09YV E MUZ A12YV MUZ AO9YVH m MUZ A12YVH The standard data contained in these specifications apply only to 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 provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve 1 GUARANTEED VOLTAGE 198 264V 50Hz 2 AIR FLOW Air flow should be set at MAX 3 MAIN READINGS m 1 Indoor intake air wet bulb temperature C WB 2 Indoor outlet air wet bulb temperature C WB 3 Outdoor intake air dry bulb temperature C DB Cooling 4 Total input W 5 Indoor intake air dry bulb temperature C DB 6 Outdoor intake air wet bulb temperature C WB 7 Total input W Indoor air wet dry bulb temperature difference on the left side of the chart on next shows the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service 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 posit
27. Changes for the Better MITSUBISHI ELECTRIC Revision A SPLIT TYPE HEAT PUMP AIR CONDITIONERS MUZ A12YV E1 and MUZ A12YVH E1 can be connected to MCFZ A12WV IE1 Some mistakes were corrected Please void OB328 OB3 REVISED EDITION A HFC utilized SERVICE MANUAL Wireless type Models MUZ A09YV MUZ A12YV MUZ A09YVH MUZ A12YVH CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 5 3 SPECIFICATION n nn n 5 4 NOISE CRITERIA CURVES 7 MAS NM 5 OUTLINES AND DIMENSIONS 8 MUZ AO09YV 6 WIRING DIAGRAN 9 MUZ A12YV Eq 7 REFRIGERANT SYSTEM DIAGRAN 11 MUZ A09YVH 8 PERFORMANCE CURVES 12 MUZ A12YVH El ACTUATOR CONTROL 21 10 SERVICE FUNCTIONS 22 11 TROUBLESHOOTING 22 12 DISASSEMBLY INSTRUCTIONS 34 PARTS UL 38 NOTE This service manual describes technical data of the outdoor units for indoor units MSZ AO9YV IE1 MSZ A12YV E1 refer to the service manual OB327 for indoor unit 2 12 refer to the service manual OB344 Revision A eMUZ A12YV E1 and MUZ A12YVH E1 can be connected to MCFZ A
28. DOOR UNIT Dae MUZ AO9YV MUZ AO9YVH E1 2 12 1 MUZ A12YVH Et Current transformer CT ETQ19Z53AY Current transformer CT761 CT781 ETQ19Z71AY Smoothing capacitor 62A C62B C61B 6804F 420V Outdoor fan capacitor C65 1 8uF 440V Diode module DB61 DB65 D25XB60 Fuse F61 250V 20A Fuse F71 F801 250V 3 15A Defrost heater H 230V130M 230130 Power transistor module IPM PS21244A Expansion valve coil LEV CAD MD12ME 12VDC Reactor L61 10A 23 0mH Current detecting resistor R831 25mQ 5W Solid state relay SRE G5N 1a G5NB 1a X64 G4A 1A PS G68isGNBis GEN aGENB a _ v 4 NOISE CRITERIA CURVES MUZ A09YV MUZ A09YVH Test conditions COOLING Ig HEATING SPEED FUNCTION dB A LINE e e e Les Cooling Dry bulb temperature 35C Wet bulb temperature 24C Heating Dry bulb temperature 7C Wet bulb temperature 6 90 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR Z A APPROXIMATE THRESHOLD Ff gt HEARING FOR CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz D di Q e p z QO Q VIP NERA ADAM aediles j NC 2 rm MUZ A12YV MUZ A12YVH FAN SPEED FUNCTION SPEED FUNCTION un Test conditions Cooling Dry bulb temperat
29. PG and JPS on the indoor electronic control P C board enables self check to be displayed in 3 seconds 2 Mis wiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the operation starts No Does the right side of OPERATION INDICATOR lamp blink quickly Yes Release the failure mode 3 Remove the short circuit between indoor terminal block and 3 Reconnect the indoor outdoor connecting wire Turn ON the power supply Press the EMERGENCY OPERATION switch Operation Indicator Is there amplitude of 5 to 10V DC between outdoor terminal block and after minutes for confirmation of serial signal Yes Is there 230V AC between outdoor terminal block 2 and INI 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 3 4 Replace the inverter P C Yes board Is there vollage approximate 280V DC between LD61A and LD66A on the inverter P C board arter 3 minutes Turn OFF the power supply and then turn ON again Press EMERGENCY OPERATION switch After 3 minutes is there approximate 230V AG between outdoor terminal block 2 and INI Yes ks gt As for indoor unit MCFZ type refer to servi
30. T mode board Since RT64 is combined with inverter P C board Reconnect the connector or connecting wire 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 7210 and power P C board 3 minutes after the power supply is turned ON Yes Replace the 4 way valve No Replace the power P C board CN721 Power P C board soldered side Unit operates HEAT mode even if it is set to COOL mode Disconnect connector CN61 between compressor and power transistor module Turn ON the power supply and press the EMERGENCY OPERATION switch once COOL mode Is there 230V AC between 7210 and on the power P C board 3 minutes after the power supply is turned ON Yes Replace the power P C board Defective R V coil Defective 4 way valve 28 Outdoor fan motor does not operate D Check of outdoor fan motor Check the resistance of fan motor Refer to page 25 Is the resistance of fan Replace the outdoor motor normal fan motor Yes Disconnect the connector CN771 on the power P C board Disconnect the connector CN61 between compressor and power transistor module Turn ON the power supply and press the EMERGENCY OPERATION switch Rectify in
31. ation Current Specification The incompatible refrigerating oil easily separates from Since refrigerant and refrigerating oil are compatible each refrigerant and is in the upper layer inside the suction muffler refrigerating oil backs to the compressor through the lower Raising position of the oil back hole enables to back the position oil back hole refrigerating oil of the upper layer to flow back to the Suction muffler Suction muffler o Compressor Oil back hole Compressor Refrigerating oil Refrigerant Refrigerating oil Refrigerant NOTE The unit of pressure has been changed to MPa on the international system of units SI unit system The conversion factor is 1 MPa Gauge 10 2 kgf cm Gauge Conversion chart of refrigerant temperature and pressure MPa Gauge 4 0 11 international system of units SI unit system 1 0 The conversion factor is 1 MPa Gauge 10 2 kgf cm2 Gauge Saturated liquid pressure WAL OM z O 2 D D o o 2 o D D 2 D e 70 O 2 D 0 5 30 20 10 0 10 20 30 40 50 60 C 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 s
32. ce manual OB344 31 light up or OFF Replace the indoor outdoor connecting wire Replace the indoor outdoor connecting wire Replace the indoor gt electronic control P C board x3 Be sure to release the failure mode recall function after checking Procedure of release of failure mode CD Press the EMERGENCY OPERATION switch Turn OFF the power supply Press the RESET button on the remote controller Turn OFF inverter controlled lighting equipment Turn OFF the power supply and then turn ON again Press the EMERGENCY OPERATION switch Is mis wiring indicated when the contactor 520 on the indoor electronic control P C board turns ON 3 minutes later Reinstall either the unit or the light each other away Attach a filter on receiving section of the indoor unit x C O MUZ A09YV E MUZ A12YV E MUZ A09YVH m MUZ A12YVH E7 Inverter P C board Refer to 29 L D66A 280V 370V DC 230V AC Jumper wire for change in defrost setting JS Back side of unit Refer to page 22 6 Q j LED monitor lamp Output to drive Connecting 92550520220 LEV Connector Zero cross 5 wire with S 3503 g 3 S oO connector for indoor signal LDU LDV LDW power P C GS 268 5 CN724 outdoor connector boar
33. d So Sg communi 800 Front side of unit D e aa 725 328 245 cation n QD o 9 CN601 18 7 J S D o Defrost thermistor RT61 Fin temperature thermistor RT64 166 Ambient temperature thermistor RT65 Discharge temperature thermistor RT62 0 120 Q 0 3 ott _ D 0 0 0 Temperature C Temperature C emperature C 32 7 09 E MUZ A12YV E MUZ A09YVH MUZ A12YVH amp Connecting wire with inverter P C board CN726 Refer to page 30 Back side of unit Front side of unit 230V AC 3 15A AC250V 2 Output to drive outdoor fan gt motor 771 2 8 230V CXB1 Q gu t o 9 g _ 5e FAR 2 T 0 2 Ber ce Heater connector 230V AC CN722 Sy gE MUZ A09YVH MUZ A12YVH 33 12 DISASSEMBLY INSTRUCTIONS Terminal with lock mechanism Detaching points 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 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector is a te
34. door outdoor connecting wire m 3 minutes after power ON is there voltage 230V AC between outdoor terminal block 2 and INI Is there voltage 230V AC between indoor terminal block 2 and Replace the indoor electronic control P C board No Replace the power P C board Yes Is there voltage 230V AC between CN771 and on the power P C board Outdoor terminal block Indoor outdoor connecting wire Yes Replace the outdoor fan motor Power P C board Inverter does not operate J Check of power supply Disconnect the connector CN61 between compressor and power transistor module Indoor outdoor Turn ON power supply and press connecting the EMERGENCY OPERATION Rectify indoor outdoor wire switch connecting wire Outdoor terminal block Yes 3 minutes after power ON is there voltage of 230V AC between outdoor terminal block and INI Is there voltage 230V AC Replace the indoor between indoor terminal electronic control block 2 and P C board v Yes Is there voltage 280V 370V DC between LD61A and LD66A on the inverter P C board Refer to page 32 Dose LED on the inverter P C board light up or flash Refer to page 32 Yes Ok 280V 370V DC If flash refer to page 24 Check the electric parts in main circuit Inverter P C
35. door unit doesn t operate even in Test operation Unit doesn t operate normal operation in COOL or HEAT mode Indoor unit operates when OPERATION switch is pressed Indoor unit doesn t operate when the EMERGENCY OPERATION switch is pressed 1 Check indoor outdoor connecting wire Check if the power is supplied to the Check room temperature thermistor Refer to Refer to 9 Check of Refer to Test point diagram and voltage MSZ type Both lamps Left and right Flash on and off 0 5 second The horizontal vanes are not installed correctly Refer to Check of installation of the horizontal inverter compressor on page 26 Outdoor unit Mis wiring or trouble of serial signal Refer to of mis wiring and serial Check of R V coil on page 28 Left lamp 2 time flash Cause room temp erature indoor coil thermistor Check room temperature thermistor and indoor coil thermis tor Refer to Test point diagram and voltage remote controller and receiver indoor unit 2 Refer to Left lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor Refer to Check of indoor fan motor P C board Check of indoor electronic control refer to service manual OB327 P C board Left lamp
36. f LEV do the undermentioned operations 1 Turn OFF the power supply and Properly fix the LEV to the expansion valve turn ON again 2 Press the RESET button on the remote controller Measure each voltage between connector pins of CN724 on the inverter P C board 1 Pin Pin 2 Pin 3 Pin Pin 4 Pin Pin Is there about 3 5V AC between each NOTE Measure the voltage by an analog tester Yes expansion valve Outdoor base gets frozen Check of defrost heater MUZ A09YVH MUZ A12YVH gt Check the following points before checking electric continuity 1 Does the resistance of ambient temperature thermistor have the characteristics Refer to page 32 2 Is the resistance of defrost heater normal Refer to page 25 3 Does the heater protector remain conducted not open 4 Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors Replace the inverter P C board In HEAT mode for more than 5 minutes let the ambient temperature thermistor continue to read 5 C or less and let the defrost thermistor continue to read 1C or less NOTE In case both thermistors are more than the above temperature cool them with cold water etc Is there 230V AC between CN722 and on the No problem of the power P C board power P C board No Is the voltage between CN726 on the Replace
37. he resistance between the 25 1 several 0 WHT RED lead wires at 3 points Compressor motor lt lt Judgement gt gt Refer to page 25 Abnormal shot OZ gt Abnormal Infinite Q Abnormal open S 00 gt lt short NOTE 1 Be sure to zero the ohmmeter before measurement S 2 Winding resistance for each phase at 20 C Refer to page 5 Abnormal infinite open F Check of compressor operation time 0 second Outdoor fan starts Connect the compressor and activate the inverter Then measure Abnormal the time until the inverter stops due to over current Compressor winding short or layer short lt lt Operation method gt gt 10 seconds Start heating or cooling operation by pressing the EMERGENCY OPERATION switch on the indoor unit Test run mode lt lt Measurement gt gt Measure the time from the start of outdoor fan running to the stop of compressor due to over current Abnormal Compressor lock out 60 seconds lt lt Judgement gt gt For reference 0 10 Abnormal compressor short Abnormal 10 60 seconds Abnormal compressor lock out Refrigerant circuit defect etc 60 seconds 5 minutes Abnormal refrigerant circuit defect more than 5 minutes Normal E mds Normal x C ZI When OPERATION INDICATOR lamp flashes 6 time The thermistors in the outdoor unit are abnormal Check of outdoor thermistors Disconnect the connectors CN641
38. ies 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 9 time flash eoeoeo 2 5 second OFF C Check of power transistor module Disconnect the connector CN61 between compressor and ohmmeter indication power transistor module and measure the resistance between terminals on the power transistor module Measurement point gt gt N at 6 points C 777 ids BLK WHT WHT BLK CS infinite BLK RED RED BLK RED WHT lt lt Judgement gt gt 412 Abnormal Infinite 9 1 0 dozens of Q 0 dozens of Abnormal short 26 D Check of compressor Start Check of compressor winding on page 27 Is the compressor normal Yes Replace the compressor Check of compressor operation time on page 27 Does the compressor operate continuously Yes Check the refrigerant circuit Is the compressor operation time more than 10 seconds No Replace the compressor E Check of compressor winding Disconnect the connector CN61 between compressor and power transistor module and measure the resistance between the Ohmmeter indication compressor terminals Measurement point at 3 points BLK WHT Normal BLK RED Measure t
39. ion where air speed is high 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 Check that the air filter is cleaned Open windows and doors of room Press the EMERGENCY OPERATION switch once twice to start the EMERGENCY COOL HEAT MODE When system stabilizes after more than 15 minutes measure temperature and take an average temperature 10 minutes later measure temperature again and check that the temperature does not change INDOOR UNIT OUTDOOR UNIT MCFZ type Wet and dry bulb Air out thermometers Wet and dry bulb Wet and dry bulb thermometers FRONT VIEW thermometers FRONT VIEW BACK VIEW Cooling capacity Total input cooling 7 3 8 2 8 7 a 1 4 5 6 8 7 6 8 0 8 1 3 5 2 g 53 7 0 7 3 1 2 E 28 57 6 4 6 6 5 1 1 M Indo 9 58 52 5 8 5 9 5 2007 v 2 55 5 47 5 3 5 3 0 9 temper 20 S ature 18 ag ae 2583 ll 27 30 35 40 45 46 LO 5 gt gt gt 222 gt gt Outdoor intake air Dry bulb temperature C Outdoor intake air Dry bulb temperature gt gt S 5 5 gt 5 5 O NNN 5 NNS O rrr ojl 2514 4 42 NIIE LNN E 0o5
40. me flash When ambient temperature thermistor shorts or opens during Refer to Check of outdoor 13 operates 2 5 seconds OFF thermistors compressor running thermistors on page 28 7 time flash Low discharge When discharge temperature has been 40 C or less for 20 Refer to Check of LEV on 14 2 5 seconds OFF temperature minutes page 30 ME protection Check refrigerant circuit and refrigerant amount 8 time flash PAM protection When the overcurrent flows into IGBT Insulated Gate Bipolar This is not malfunction 2 5 seconds OFF transistor TR821 or when the bus bar voltage reaches 300V PAM protection will be activated in PAM or more PAM stops and restarts the following cases Pulse Instantaneous power voltage drop Amplitude Short time power failure Modulation the power supply is igh 9 time flash Inverter check When the connector of compressor is disconnected inverter Check if the connector is correctly 2 5 seconds OFF mode check mode starts connected Refer to How to check inverter compressor on page 26 The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Example When the flashing frequency is 2 0 5 second ON ON 2 5 second OFF 24 2 Trouble criterion of main parts MUZ A09YV MUZ A12YV E7 MUZ A09YVH n MUZ A12YVH Em Check method and criterion Defrost thermistor RT61 Measure the resistance with a
41. oard exceeds 79 C compressor stops and Check outdoor unit air passage protection restarts 3 minutes later Refer to D Check of outdoor fan motor on page 29 5 time flash High pressure When indoor coil thermistor exceeds 70 C Check refrigerant circuit and 2 5 seconds OFF protection When the defrost thermistor exceeds 70 in COOL mode refrigerant amount Check stop valve Compressor ic di Check stop valve j When the waveform of compressor current is distorted Reconnect 2 5 seconds OFF Refer to How to check inverter compressor on page 26 1 time flash Frequency drop by When current from power outlet exceeds 7A MUZ A09YV The unit is normal but check the 2 5 seconds OFF current protection MUZ AO9YVH 9A MUZ A12YV MUZ A12YVH compressor following frequency lowers Check if indoor filters are clogged Check if refrigerant is short 3 time flash Frequency drop by When indoor coil thermistor exceeds 55 in HEAT mode Check if indoor outdoor unit air 2 5 seconds OFF high pressure compressor frequency lowers circulation is short cycled protection Frequency drop by When indoor coil thermistor reads 6 or less in COOL mode SIM in COOL compressor frequency lowers mode 4 time flash Frequency drop by When discharge temperature thermistor exceeds 110 12 2 5 seconds OFF discharge compressor frequency lowers temperature protection Outdoor unit 5 ti
42. or and discharge temperature thermistor CN643 Ambient temperature thermistor CN724 LEV Remove the compressor connector CN61 Remove the screws fixing the relay panel Photo 3 Remove the inverter assembly Photo 3 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 Photo 4 board 11 Remove the power P C board from the inverter assembly 4 5 6 7 Inverter Power Heat sink P C board P C board 3 Removing R V coil 1 Remove the top panel cabinet and service panel Refer 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 Remove the R V coil Photo 5 Screw of the power P C board x C O OPERATING PROCEDURE PHOTOS 4 Removing the defrost thermistor and discharge tem perature thermistor 1 Remove the top panel cabinet and service panel Refer 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 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the discharge temperature thermistor from its holder Photo 5 Discharge temperat
43. r R22 pipe For details of flaring work refer to Installation manual FLARING WORK Pipe diameter Dimension of flare nut 3 Refrigerant oil Apply the special refrigeration oil accessories packed with 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 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 decreases or normal operation can be impossible However charging the liquid refrigerant all at once may cause the compressor to be locked Thus charge the refrigerant slowly Indoor unit Refrigerant gas cylinder operating valve Union Stop valve Outdoor unit Service port N Gauge manifold valve for R410A Refrigerant gas cylinder for R410A with siphon Refrigerant liquid Electronic scale for refrigerant charging 2 PART NAMES AND FUNCTIONS ACCESSORIES MUZ AO9YVH MUZ A12YVH ACCESSORIES OUTDOOR UNIT OUTDOOR UNIT
44. rminal with lock mechanism Slide the sleeve Hold the sleeve and 7 the terminal while pull out the terminal pushing the locking slowly lever Connector MUZ AO9YV m MUZ A12YV Em MUZ A09YVH MUZ A12YVH Em OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Removing the cabinet Photo 1 Remove the screws fixing the top panel Photo 1 Remove the top panel Photo 1 Remove the screw fixing the service panel Photo 2 Pull down the service panel and remove it Photo 2 1 2 Screws of 3 4 5 Remove the screws fixing the cabinet Screws of 6 7 8 9 the top panel Remove the cabinet the top panel Disconnect the indoor outdoor connecting wire i Remove the screws fixing the back panel Remove the back panel Photo 2 Service Screw of the Screws of panel service panel the cabinet Direction to remove Hooks Screws of the cabinet OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board and power P C board 1 Remove the top panel cabinet and service panel Refer to 1 Screws of the relay panel 2 Disconnect the indoor outdoor connecting wire and remove the back panel Refer to 1 3 Disconnect the ground wire the lead wire to the reactor and the following connectors lt Power P C board gt CN721 4 way valve CN722 Defrost heater MUZ A09 A12YVH CN771 Fan motor lt lnverter P C board gt CN641 Defrost thermist
45. rrection of Heating total input 0 2 0 1 5 ES Capacity correction factors Input correction factors Capacity correction factors o Input dud factors 0 0 0 0 0 0 0 0 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz O 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT er EE UU e Em pa a ga a pupa ea How to operate fixed frequency operation Test run operation 1 Press the EMERGENCY OPERATION switch to COOL or HEAT mode COOL Press once HEAT Press twice 2 Test run operation starts continue to operate for 30 minutes 3 Compressor operates at rated frequency in COOL mode or 58Hz in HEAT mode 4 Indoor fan operates at High speed 5 After 30 minutes test run operation finishes and EMERGENCY OPERATION starts Operation frequency of compressor varies 6 To cancel test run operation EMERGENCY OPERATION press the EMERGENCY OPERATION switch or any button on remote controller c
46. top valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit Cap size has been changed from 7 16 UNF with 20 threads to 1 2 UNF with 20 threads R410A tools Can R22 tools be used Description R410A has high pressures beyond the measurement range of existing gauges Port diameters have been changed to prevent any other refrigerant from being charged into the unit Charge hose Hose material and cap size have been changed to improve the pressure resistance Gauge manifold Gas leak detector Dedicated for HFC refrigerant 6 35 mm and 9 52 mm Torque wrench Flare tool Yes Clamp bar hole has been enlarged to reinforce the spring strength in the tool Flare gauge Provided for flaring work to be used with R22 flare tool adapter vacuum pumps refrigerant charging refrigerant bubbles due to high pressure and high speed vaporization No Not Substitutable for RA10A Yes Substitutable for R410A O O O es 2 Refrigerant piping O Specifications Use the refrigerant pipes that meet the following specifications Outside diameter wall Insulation material For liquid H For gas Specific gravity 0 045 Thickness 8 mm e Use a copper pipe or a copper alloy seamless pipe with a thickness of 0 8 mm Never use any pipe with a thickness less than 0 8mm as the pressure resistance is insufficient x C ZI Flaring work and flare nut Flaring work for R410A pipe differs from that fo
47. ure 35C Wet bulb temperature 24 Heating Dry bulb temperature 7C Wet bulb temperature 6 80 2 o z e o 5 PEP AZ APPROXIMATE THRESHOLD SANE HEARING FOR CONTINUOUS NOISE 125 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz 20 EE E REIR E 20 BAND SOUND PRESSURE LEVEL dB 0 0002 MICRO CAL OUTDOORUNIT 1m MICROPHONE OUTLINES AND DIMENSIONS MUZ A09YV MUZ A12YV Em Unit mm MUZ A09YVH m MUZ A12YVH Em OUTDOOR UNIT REQUIRED SPACE Basically open 100mm or more without any obstruction in front and on both sides of the unit Drain hole 42 MUZ A09 A12YV 40 Drain hole 433 MUZ A09 A12YVH Bolt pitch for installation E ui Cs Sea b 35351 Open two sides of left right or rear side Air out Service panel 22 3 Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 EV cures Gas refrigerant pipe joint Refrigerant pipe flared 9 52 Service port 6 WIRING DIAGRAM vSie WOlsiNH3HL3unlVH3dW3lNI4 798 HOISISNVHLH3MOdI 022222222200 9 9 9 2918 H3MOd IN3OITI3INI 10801 BHOISSWW IusWO ONPONMS iz9ul WOD3Snd 104 MOO18 VNINH3I amp lL 3sniu3NN HOLONNviHOOQInO
48. ure thermistor Photo 6 Defrost thermistor 36 OPERATING PROCEDURE PHOTOS 5 Removing outdoor fan motor Photo 7 1 Remove the top panel cabinet and service panel Screws of Refer to 1 outdoor 2 Disconnect the indoor outdoor connecting wire and remove p fan motor the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Remove the propeller 5 Remove the screws fixing the fan motor Photo 7 6 Remove the fan motor Photo 7 6 Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer 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 NOTE Before using a burner reclaim gas from the pipes until the pressure gauge shows 0 kg cm OMPa Use the burner under the condition that gas can be recovered even when the inner pressure rises by heat Welded parts of 4 way valve 37 13 PARTS LIST MUZ AO9YV n MUZ A12YV Em MUZ A09YVH MUZ A12YVH E 13 1 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 17 16 15 14

SERVICE MANUAL MUZ-A09YV - MUZ-A12YV

Contents

Download Pdf Manuals

Related Search

Related Contents