Mitsubishi MUZ-FD12NA-U1 - Manuals

66 OUTLINES AND DIMENSIONS 4 Unit: inch MUZ-FD09NA MUZ-FD12NA Liquid pipe :1/4 (flared) Gas pipe :3/8 (flared) 6-23/32 2 5-7/8 2-23/32 1-3/4 15-3/4 12 ~ 12-3/4 13-9/16 11 /1 6 1-9/16 7/8 21-5/8 1 1 -1/32 13/32 31-1/2 19-11/16 5-15/16 11-29/32 17/32 29/32 11-1/4 Air in handle Air in Air out 2- 3/8 13...

8 6 REFRIGERANT SYSTEM DIAGRAM Unit: inch MUZ-FD09NA MUZ-FD12NA Outdoor heat exchanger Flared connection Defrost thermistor RT61 DischargetemperaturethermistorRT62 Service port Service port Flared connection Stop valve (with strainer) Stop valve(with service port) Refrigerant flow in cooling Compres...

9 DATA 7 MUZ-FD09NA MUZ-FD12NA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY Model Indoor air Outdoor intake air DB temperature ( ˚ F) IWB ( ˚ F) 75 85 95 105 115 TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC MUZ-FD09NA 71 11.0 6.9 0.58 10.3 6.5 0.63 9.7 6.1 0.68 9.0 5.6 0.72 8.3 5.2 0.75 67 10...

10 10 7-2. PERFORMANCE CURVE 65 70 75 75 70 65 12 10 6 4 8 Indoor intake air DB tem perat ure (°F) = 381 CFM Airflow 15 5 25 35 45 55 Outdoor intake air WB temperature (°F) 0.4 0.6 0.8 Indoor intak e air DB temperat ure (°F ) T o tal power consumption (kW) T o tal capacity (1 0 3 Btu/h) 65 70 75 75 ...

14 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY Capacity correction factors Input correction factors Input correction factors Capacity correction factors Correction of Cooling capacity The operational frequency of compressor Correction of Cooling total input The operational freque...

15 15 8 ACTUATOR CONTROL MUZ-FD09NA MUZ-FD12NA 8-2. 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 O...

16 SERVICE FUNCTIONS 9 9-1. CHANGE IN DEFROST SETTING Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to 10-6-1.) Jumper Defrost fi nish temperature JS Soldered (Initial setting) 41°F (5°C) Non...

23 10-5. TROUBLESHOOTING FLOW Are the voltages balanced? Disconnect the connector (CN61) between compressor and the intelligent power module (IPM). Replace the inverter P.C. board. Check the voltage between terminals. Check the compressor. See 10-5. “Check of compressor”. No Yes See 10-5. “Check of ...

25 Is the thermistor normal? (Refer to 10-6.1.) Reconnect the connector of thermistor. Turn ON the power supply and press EMERGENCY OPERATION switch. No Replace the thermistor except RT64. When RT64 is abnormal, replace the inverter P.C. board. Does the unit operate for 10 minutes or more without sh...

29 M How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the power supply? Yes No Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor terminal block S1 and S2? No Check the wiring. Press EMERGENCY OPERATION switch o...

30 N 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...

31 10-6. TEST POINT DIAGRAM AND VOLTAGE -4 14 32 50 68 86 104 0 10 20 30 40 50 60 70 80 90 100 Temperature(°F) Defrost thermistor(RT61) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68) Temperature(°F) Discharge temperature thermistor(RT62) 32 50 68 86 104 122 ...

32 11-1. MUZ-FD09NA MUZ-FD12NA NOTE : Turn OFF power supply before disassembling. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screw fixing the service panel. (See Photo 1.) (2) Pull down the service panel and remove it. (See Photo 1.) (3) Remove the screws fixing the conduit co...

33 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C. board>CN721 (R.V.coil)CN932 (Fan motor)CN641 (Defrost thermistor and di...

34 OPERATING PROCEDURE PHOTOS 5. Removing outdoor fan motor (1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the connectors for outdoor fan motor.(3) Remove the propeller nut. (See Photo 7.)(4) Remove the propeller. (See Photo 7.)(5) Remove the screws fixing the fan motor. (See Photo 7...

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2008 MITSUBISHI ELECTRIC CO.,LTDDistributed in Nov. 2008. No. OBH498 REVISED EDITION-B 5Distributed in Mar. 2008. No. OBH498 REVISED EDITION-A 7Distributed in Jan. 2008. No. OBH498 7Made in Japan New publicati...