Mitsubishi Outdoor Unit Split-Type Air Conditioner MUZ-AP50VG

Remove the screws of the service panel

Remove the screws of the top panel

Remove the screw of the valve cover

Disconnect the power supply and indoor/outdoor connecting wire

Remove the screws of the cabinet

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

(2) Remove the inverter assembly. (Refer to section 2.)

(3) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).

(4) Detach the brazed part of the suction and the discharge pipe connected with compressor.

(5) Remove the compressor nuts.

(7) Detach the brazed part of pipes connected with 4-way valve.;

Connect the compressor and activate the inverter

Compressor connected and inverter activated

Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit

Heating or cooling operation started

Time from the start of compressor to the stop of compressor due to overcurrent

Sign off on the compressor operation time check

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