Page 3 - Air outlet
33 1 TECHNICAL CHANGES MUZ-FD09NA MUZ-FD12NA MUZ-FD09NA - U1 1. New model PART NAMES AND FUNCTIONS 2 MUZ-FD09NA MUZ-FD12NA MUZ-FD12NA - U1 Air outlet Drain outlet Piping Drain hose Air inlet
Page 4 - SPECIFICATION; NOTE
44 3 SPECIFICATION Outdoor unit model MUZ-FD09NA MUZ-FD12NA Capacity Rated (Minimum~Maximum) Cooling 1 Btu/h 9,000 (2,800~9,000) 12,000 (2,800~12,000) Heating 47 1 Btu/h 10,900 (3,000~18,000) 13,600 (3,000~21,000) Capacity Rated Heating 17 2 Btu/h 7,700 8,300 Power consumption Rated (Minimum~Maximum...
Page 5 - Test condition; OPERATING RANGE
55 Test condition ARI Mode Test Indoor air condition Outdoor air condition Dry bulb (°F) Wet bulb (°F) Dry bulb (°F) Wet bulb (°F) SEER (Cooling) "A" Cooling Steady State at rated compressor Speed 80 67 95 (75) "B-2" Cooling Steady State at rated compressor Speed 80 67 82 (65) "B...
Page 6 - OUTLINES AND DIMENSIONS; REQUIRED SPACE
66 OUTLINES AND DIMENSIONS 4 Unit: inch MUZ-FD09NAMUZ-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 1 1/16 1-9/16 7/8 21-5/8 11 -1 /3 2 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/...
Page 7 - WIRING DIAGRAM
Page 8 - REFRIGERANT SYSTEM DIAGRAM; Service; MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
8 6 REFRIGERANT SYSTEM DIAGRAM Unit:inch MUZ-FD09NAMUZ-FD12NA 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 Compr...
Page 9 - DATA
9 DATA 7 MUZ-FD09NA MUZ-FD12NA 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-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...
Page 10 - Heating
10 10 7-2. PERFORMANCE CURVE 65 70 75 75 70 65 12 10 6 8 Indoor intake air DB tem perature (°F) = 381 CFM Airflow 15 25 35 45 55 Outdoor intake air WB temperature (°F) 0.4 0.6 0.8 Indoor intake air DB temperat ure (°F) Total power consumption (kW) Total capacity (1 0 3 Btu/h) 65 70 75 75 70 65 20181...
Page 14 - -5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY
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...
Page 15 - ACTUATOR CONTROL; The fan motor turns ON/OFF, interlocking with the compressor.; -3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
15 15 8 ACTUATOR CONTROL MUZ-FD09NAMUZ-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 OF...
Page 16 - SERVICE FUNCTIONS; JS; TROUBLESHOOTING; components for bursting and discoloration.
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) N...
Page 17 - Outline of the function
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. This mode is very useful when the unit needs to be repa...
Page 18 - Operational procedure
18 Does POWER 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 POWER lamp. 2 Yes (Blinks ) No (OFF) The outdoor unit might be abnormal.Con fi rm if outdoor unit is abnormal according to the follow...
Page 23 - fl; B Check of open phase
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 ...
Page 25 - G Check of outdoor thermistors; Unit operates COOL mode even if it is set to HEAT mode.
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...
Page 26 - I Check of outdoor fan motor; Outdoor fan motor does not operate.; J Check of power supply; Inverter does not operate.
26 I Check of outdoor fan motor Outdoor fan motor does not operate. J Check of power supply Inverter does not operate. Is the outdoor fan motor normal? (Refer to 10-4.) Replace the outdoor fan motor. Disconnect CN932 from the inverter P.C. board, and measure the resistance of the outdoor fan motor. ...
Page 30 - N Electromagnetic noise enters into TV sets or radios
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...
Page 32 - Removing the cabinet; DISASSEMBLY INSTRUCTIONS; (1) Slide the sleeve and check if there is a locking lever or not.; Photo 1
32 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 cover. (See Photo 2.) (4) Remove the conduit cover. (See Photo 2.)(5) Disconnect ...
Page 33 - (2) Disconnect the lead wire to the reactor and the following; Removing the discharge temperature thermistor,; Discharge temperature thermistor; Photo 3; Heat sink
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...
Page 34 - Removing outdoor fan motor
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...
Page 36 - Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD; TM
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jan. 2008. No. OBH498 7Made in Japan New publication, effective Jan. 2008Specifications subject to change without notice. TM