Mitsubishi Outdoor Unit MUZ-D30NA

Remove the screws of the service panel

Remove the screws of the top panel

Remove the screw of the valve cover

Remove the screws of the cabinet

Remove the screws of the back panel

Remove the top panel, cabinet, service panel and the back panel.

Recover gas from the refrigerant circuit until the pressure gauge shows 0 PSIG.

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

Detach the brazed part of 4-way valve and pipe.

Sign off on the compressor and 4-way valve replacement

Remove the top panel, cabinet, service panel and the back panel

Disconnect the following connectors: <Electronic control P.C. board> CN931 and CN932 (Fan motor)

Remove the screws fixing the outdoor fan motor

Remove the top panel, cabinet, service panel and the back panel.

Disconnect the following connectors: CN931 and CN932 (Fan motor), CN795 (LEV), CN661 (Discharge temperature thermistor, defrost thermistor (MUZ) and outdoor heat exchanger temperature thermistor), CN663 (Ambient temperature thermistor), CN681 (High pressure switch) (MUZ), CN912 (4-way valve) (MUZ)

Remove the screws fixing the relay panel.

Disconnect all connectors and lead wires on the electronic control P.C. board.

Remove the electronic control P.C. board from the inverter assembly.

Remove the screws fixing the power board assembly.

Disconnect all connectors and lead wires on the power board.

Remove the power board from the inverter assembly.

Warning: This procedure should only be performed by trained personnel.

Sign off on the reactor replacement