Mitsubishi Outdoor Unit Split-Type Air Conditioner MUZ-AP60VG

Remove the cabinet and panels. (Refer to section 1.)

Disconnect the lead wire to the reactor and the following connectors:

CN641 (Defrost thermistor and discharge temperature thermistor)

CN643 (Ambient temperature thermistor)

CN644 (Outdoor heat exchanger temperature thermistor)

Pull out the discharge temperature thermistor from its holder.

Pull out the defrost thermistor from its holder.

Pull out the outdoor heat exchanger temperature thermistor from its holder.

Section 1: Cabinet and Panels Removal

Section 2: Disconnecting Connectors

Disconnect the following connectors

Section 3: Propeller Fan Nut Removal

Section 4: Propeller Fan Removal

Section 5: Fan Motor Screws Removal

Warning: Ensure the connector between the compressor and the power module (IC700) is disconnected before starting the procedure.

Measure the output voltage. It should be between 50 - 130 V.

Operation method: Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit.

Measurement point: Measure AC voltage between the lead wires at 3 points.

Voltage between BLK (U)-WHT (V)

Voltage between BLK (U)-RED (W)

Note: 1. Output voltage varies according to power supply voltage. 2. Measure the voltage by analog type tester. 3. During this check, LED of the inverter P.C. board blinks 9 times.

Warning: Disconnect the connector between the compressor and the power module (IC700) before proceeding

Ohmmeter zeroed before measurement

Resistance measurement between BLK-WHT

Resistance measurement between BLK-RED

Resistance measurement between WHT-RED

Sign off on the compressor winding check

Disconnect the lead wire to the reactor and the following connectors: CN721, CN722, CN931, CN932, CN641, CN643, CN644, CN724

Remove the compressor connector (CN61)

Remove the screws fixing the heat sink support and the separator

Remove the fixing screw of the P.B. support and the separator

Remove the fixing screws of the terminal block support and the back panel

Remove the heat sink support from the P.C. board support

Remove the screw of the inverter P.C. board and remove the inverter P.C. board from the P.C. board support