Mitsubishi Mr.Slim MSZ-A12NA- Manuals

6 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, reinstallatio...

7 Item Model MSZ-A09NA MSZ-A12NA Capacity Rated (Minimum-Maximum) Cooling 1 Btu/h 9,000 (5,500-9,000) 12,000 (5,700-12,000) Heating 47 1 Btu/h 10,900 (5,200-12,600) 13,600 (5,200-13,600) Capacity Heating 17 2 Btu/h 7,700 8,300 Power consumption Rated (Minimum-Maximum) Cooling 1 W 690 (390-690) 1,170...

10 Test condition 3, 4 Mode Test Indoor air condition ( ˚ F) Outdoor air condition ( ˚ F) Dry bulb Wet bulb Dry bulb Wet bulb ARI SEER (Cooling) "A" Cooling Steady State at rated compres- sor Speed 80 67 95 (75) "B-2" Cooling Steady State at rated com- pressor Speed 80 67 82 (65) ...

11 30° 35° 6-1/28 3-17/32 7-25/32 1-9/16 20-9/32 11-25/32 2-19/32 2 14-3/16 33-7/16 16-15/16 19-11/16 3-3/16 4-25/32 33-1/16 Open as a rule20 inch or more ifthe front and bothsides are open 4 inch or more /8 inch or more if there are obstaclesto both sides Open as a rule20 inch or more if the back,b...

12 MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA 5 WIRING DIAGRAM

20 Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Service port Service port Flared connection Stop valve (with strainer) Stop valve (with service port) Refrigerant flow in cooling Compressor 4-way valve Refrigerant flow in heating ( MUZ ) Refri...

22 Max. Length A Max. Height difference B Indoorunit Outdoor unit MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Model Refrigerant piping: ft. Piping size O.D: in. Max. Length A Max. Height difference B Gas Liquid MUZ-A09NA MUZ-A12NA 65 40 3/8 1/4 MUZ-A15NA MUY-A15NA MUZ-A17NA MUY-A17NA 1...

23 MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA MUZ-A24NA MUZ-GA24NA MUY-A15NA MUY-A17NA MUY-A24NA MUY-GA24NA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY Model Indoor air Outdoor intake air DB temperature ( ˚ F) IWB 75 85 95 105 115 ( ˚ F) TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC MUZ-A09NA MU...

25 7-2. PERFORMANCE CURVE 65 70 75 75 70 65 To tal power consumption (kW) To tal capacity (1 0 3 Btu/h) Outdoor intake air WB temperature (°F) = 307 CFM Airflow 12 14 10 8 9 11 13 15 7 1.0 15 25 35 45 55 0.8 0.6 0.7 0.9 Ind oor intak e air DB temperature (°F ) Indoor intak e air DB temperature (°F )...

35 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY Correction of Cooling total input Input correction factors The operational frequency of compressor Correction of Cooling capacity Capacity correction factors The operational frequency of compressor Correction of Cooling capacity Capa...

37 ON OFF ON OFF Outdoor fan motor Compressor 5 seconds 15 seconds MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA MUZ-A24NA MUY-A15NA MUY-A17NA MUY-A24NA MUZ-GA24NA MUY-GA24NA 8-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR 8-2. R.V. COIL CONTROL(MUZ) Heating . . . . . . . . . . . . . . . . . ON Cooling . ....

38 CHANGE IN DEFROST SETTING <JS> When the JS wire of the outdoor Inverter P.C. board is cut/soldered, the defrost finish temperature is changed. (Refer to 10-6.1.) Jumper wire Defrost fi nish temperature °F (°C) MUZ-A09/12NA MUZ-A15/17NA JS Soldered (Initial setting) 50 (10) 41 (5) None (Cut)...

39 This figures show about MSZ-A09/12/15/17. Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-3.) disappears, the memorized failure details can be recalled. 10-2. FAILURE...

40 Does left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds?Blinks: The outdoor unit is abnormal. Beep is emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp. 2 Yes (Blinks ) No (OFF) The outdoor unit might be abnormal.Con...

41 3. Outdoor unit failure mode table MUZ-A09/12/15/17NA MUY-A15/17NA The left lamp of OPERATION INDICATOR lamp (Indoor unit) Abnormal point (Failure mode / protection) LED indication (Outdoor P.C. board) Condition Correspondence Indoor/outdoor unit failure mode recall function Outdoor unit failure ...

47 10-5. Troubleshooting flow MUZ-A09/12/15/17 MUY-A15/17 MUZ-A24 MUY-A24 MUZ-GA24 MUY-GA24 Check the voltage between terminals. Check the compres-sor. Disconnect the connector (CN61) between compressor and the intel-ligent power module (IPM). Check the resistance of the intelligent power module. Se...

48 ● Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance be- tween the compressor terminals. <<Measurement point>> At 3 points BLK-WHT BLK-RED WHT-RED <<Judgement>> Refer to 10-4. 0 [ Ω ] ················Abnormal (sh...

52 MUZ-A09/12/15/17 MUY-A15/17 I Check of outdoor fan motor MUZ-A24 MUY-A24 MUZ-GA24 MUY-GA24 Is the resistance between each terminal of outdoor fan motor normal? (Refer to 10-4.) No Yes Disconnect CN932 from the inverter P.C. board. Turn ON the power supply. Rotate the outdoor fan slowly by hand, a...

53 MUZ-A24 MUY-A24 MUZ-GA24 MUY-GA24 MUZ-A09/12/15/17 MUY-A15/17 J Check of power supply Is there voltage 208/230 VAC between the indoor terminal block S1 and S2? No Yes Replace the indoor electronic control P.C. board. Rectify indoor/outdoor connecting wire. Yes If light up, OK. If fl ash, refer to...

54 MUZ-A09/12/15/17 MUY-A15/17 K Check of current-limiting resistor MUZ-A24 MUY-A24 MUZ-GA24 MUY-GA24 When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly. Replace the power P.C. board or the inverter P.C. board. Does LED on the inverter P.C. board ...

57 N How to check miswiring and serial signal error Inverter P.C.board(Parts side) LED Blinking Outdoor electronic control P.C. board Blinking Lighted (Parts side) LED2 LED1 Turn OFF the power supply. Is there rated voltage in the power supply? Yes No Turn ON the power supply. Check the power supply...

58 O Electromagnetic noise enters into TV sets or radios Yes Is the unit grounded? No Ground the unit. Yes Is the distance between the antennas and the indoor unit within 9.91 ft., or is the distance between the antennas and the outdoor unit within 9.91 ft.? No Extend the distance between the antenn...

59 P Check of bus-bar voltage MUZ-A24NA MUY-A24NA MUZ-GA24NA MUY-GA24NA •Check the voltage of power supply. •Con fi rm outdoor unit failure mode recall function. (Refer to 10-2.2) Blink 5 times Con fi rm LED1 indication lamp on the outdoor electronic control P.C. board. Replace the power board. Blin...

60 Back side of unit -4 14 32 50 68 86 104 0 10 20 30 40 50 60 70 80 90 100 Temperature (°F) Ambient temperature thermistor (RT65) Defrost thermistor (RT61) Temperature (°F) Discharge temperature thermistor (RT62) 32 50 68 86 104 122 140 158 176 194 212 230 248 0 100 200 300 400 500 600 700 32 50 68...

64 MUZ-A24NA MUY-A24NA 5. Outdoor power board 294-370 VDCOutput (Red) (White) Connect to the compressorVoltage among phases: 5 to 180 V Connect to the ground CN5Primary current detection(Connect to the noise filter) CN2 Connect to the controller board (+)1-5(–): Signal transmission (To electronic co...

65 11-1. MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA MUY-A15NA MUY-A17NA OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screw fixing the service panel. (Photo 1)(2) Pull down the service panel and remove it. (Photo 1)(3) Remove the screws fixing the conduit cover. (Photo 2)(4) Remove ...

66 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.) (2) Disconnect the power supply and indoor/outdoor con- necting wire and remove the back panel. (Refer to 1.) (3) Disconnect th...

67 OPERATING PROCEDURE PHOTOS 5. Removing outdoor fan motor (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Disconnect the power supply and indoor/outdoor con- necting wire and remove the back panel. (Refer to 1.) (3) Disconnect the connectors for outdoor fan motor.(4) Remove ...

69 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board and power board (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.)(3) Disconnect the following connectors: <Electronic control P.C. board> CN931 and CN9...

70 OPERATING PROCEDURE PHOTOS 4. Removing the defrost thermistor (MUZ), dis- charge temperature thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.)(3) ...

71 OPERATING PROCEDURE PHOTOS 6. Removing the compressor and 4-way valve (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.)(3) Remove the inverter assembly. (Refer to 2.)(4) Recover gas from the refrigerant circuit. NOTE: Recover gas from the ...

72 12-1. PARTS LIST (non-RoHS compliant) 1 2 15 17 12 10 11 MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA MUY-A15NA MUY-A17NA 1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 3 4 5 6 7 8 16 14 18 19 9 13 20 PARTS LIST 12

73 1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. No. Part No. Part name Symbol in Wiring Diagram Q'ty/unit Remarks MUZ- MUY- A09NA A12NA A15NA A17NA A15NA A17NA 1 E02 927 232 CABINET 1 1 1 1 1 1 2 E02 927 521 GRILLE 1 1 1 1 1 1...

74 8 1 4 MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA MUY-A15NA MUY-A17NA 2. OUTDOOR UNIT ELECTRICAL PARTS 2 3 5 6 7

76 4 18 1 12 8 10 2 5 7 6 16 14 19 20 21 22 23 28 29 30 3 MUZ-A24NA MUY-A24NA3. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 9 15 17 27 26 25 24 11 13

79 1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. No. RoHS Part No. Part name Symbol in Wiring Diagram Q'ty/unit Remarks MUZ-A MUY-A 09NA 12NA 15NA 17NA 15NA17NA - 1 - U1 - U2 - U1 - U1 - U1 1 G E12 927 232 CABINET 1 1 1 1 1 1 1...

13-1. DRAIN SOCKET Model Part No. MUZ-A09/12/15/17NA MUY-A15/17NA MAC-851DS 13-2. DRAIN SOCKET ASSEMBLY Model Part No. MUZ-A24NAMUY-A24NA MUZ-GA24NAMUY-GA24NA MAC-811DS HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2006 MITSUBISHI ELECTRIC CO.,LTD Distrib...