Mitsubishi Electronics MUY-GE09NA, MUY-GE12NA, MUY-GE15NA, MUY-GE18NA, MUZ-GE09NA, MUZ-GE12NA, MUZ-GE15NA, MUZ-GE18NA 2PART NAMES AND FUNCTIONS

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA

MUY-GE09NA MUY-GE12NA MUY-GE15NA

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

MUZ-GE18NA MUY-GE18NA

Piping

Air outlet

Drain hose

Drain outlet

Air inlet

(back and side)

2PART NAMES AND FUNCTIONS

Contents

Main SERVICE MANUAL 1TECHNICAL CHANGES 2PART NAMES AND FUNCTIONS 3SPECIFICATION Page Test condition 3, 4 (2) OPERATION 3-1. OPERATING RANGE (1) POWER SUPPLY 4OUTLINES AND DIMENSIONS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA REQUIRED SPACE 4 in. or more 14 in. or more Page Page Page 6REFRIGERANT SYSTEM DIAGRAM MUZ-GE09NA MUY-GE09NA O.D. 0.118 I.D. 0.079 9-7/16 (3.0 2.0 240) ) 600 MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Model Refrigerant piping: ft. Piping size O.D: in. Max. Length A Max. Height difference BGas Liquid MUZ-GE09/12/15NA MUY-GE09/12/15NA 65 40 3/8 (GE09/12) 1/2 (GE15) 1/4 MUZ-GE18NA MUY-GE18NA 100 50 1/2 7DATA MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA 7-2. PERFORMANCE CURVE Cooling MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NA MUZ-GE15NA MUY-GE15NA Heating (MUZ) MUZ-GE09NA MUZ-GE12NA MUZ-GE18NA MUY-GE18NA Indoor intake air WB temperature (F) MUZ-GE15NA MUZ-GE18NA MUZ-GE12NA MUY-GE12NA 180 160 140 120 MUZ-GE09NA MUZ-GE12NA MUZ-GE18NA MUY-GE18NA 145 130 MUZ-GE18NA MUZ-GE15NA 7-4. STANDARD OPERATION DATA Page 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ-GE09NA MUY-GE09NA MUZ-GE18NA MUZ-GE12NA MUZ-GE12NA MUY-GE12NA 8ACTUATOR CONTROL 8-2. R.V. COIL CONTROL (MUZ) 8-1. OUTDOOR FAN MOTOR CONTROL 8-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR 9-1. CHANGE IN DEFROST SETTING (MUZ) 10 TROUBLESHOOTING 9SERVICE FUNCTIONS 10-1. CAUTIONS ON TROUBLESHOOTING 10-2. FAILURE MODE RECALL FUNCTION 1. Flow chart of failure mode recall function for the indoor/outdoor unit 2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure 3. Outdoor unit failure mode table NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (10-3.). 10-3. TROUBLESHOOTING CHECK TABLE 10-4. TROUBLE CRITERION OF MAIN PARTS 10-5. TROUBLESHOOTING FLOW B Check of open phase A How to check inverter/compressor C Check of compressor F Check of compressor start failure D Check of compressor winding E Check of compressor operation time G Check of outdoor thermistors H Check of R.V. coil Unit operates HEAT mode even if it is set to COOL mode. Unit operates COOL mode even if it is set to HEAT mode. I Check of outdoor fan motor MUZ-GE09/12/15NA MUY-GE09/12/15NA MUZ-GE18NA MUY-GE18NA J Check of power supply K Check of LEV (Expansion valve) L Check of inverter P.C. board M How to check miswiring and serial signal error N Electromagnetic noise enters into TV sets or radios 1. Inverter P.C. board MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA 10-6. TEST POINT DIAGRAM AND VOLTAGE Page 11 DISASSEMBLY INSTRUCTIONS 11-1. MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY -GE15NA 1. Removing the cabinet Photo 2 Photo 1 2. Removing the inverter assembly, inverter P.C. board 3. Removing R.V. coil Photo 5 Photo 3 Photo 4 (Inverter assembly) 5. Removing outdoor fan motor 6. Removing the compressor and 4-way valve Photo 8 NOTE: Photo 6 11-2. MUZ-GE18NA MUY-GE18NA 1. Removing the cabinet Photo 2 Photo 1 2. Removing the inverter assembly, inverter P.C. board Photo 3 Photo5 Photo 4 (Inverter assembly) 3. Removing R.V. coil Photo 6 Photo 8 Photo 7 5. Removing outdoor fan motor 6. Removing the compressor and 4-way valve

Mitsubishi Electronics 2PART NAMES AND FUNCTIONS

Models: MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA