Mitsubishi Electric MUZ-AY25VG Service Manual page 62

OPERATING PROCEDURE
2. Removing the inverter assembly and inverter P.C. board
(1) Remove the cabinet and panels (refer to section 1).
(2) Disconnect the lead wire to the reactor and the following
connectors:
<Inverter P.C. board>
CN721 (R.V. coil)
CN931, CN932 (Fan motor)
CN641 (Defrost thermistor and discharge temperature
thermistor)
CN643 (Ambient temperature thermistor)
CN644 (Outdoor heat exchanger temperature thermistor)
CN724 (Expansion valve coil)
CN722 (Defrost heater and heater protector)
(MUZ-AY50VGH)
CN64 (Compressor protector)
(3) Remove the compressor connector (CN61).
(4) Remove the screws fixing the heat sink support and the
separator.
(5) Remove the fixing screw of the P.B. support and the separator.
(6) Remove the fixing screws of the terminal block support and
the back panel.
(7) Remove the inverter assembly.
(8) Remove the screws of the earth wires.
(9) Remove the heat sink support from the P.C. board support.
(10) Remove the screw of the inverter P.C. board and remove the
inverter P.C. board from the P.C. board support.
OBH931
PHOTOS/FIGURES
Photo 3
Screw of the heat sink
support and the separator
Photo 4
(MUZ-AY50VGH)
Photo 5 (Inverter assembly)
Heat sink support
P.C. board support
Heat sink
Inverter P.C. board
Screw of the inverter P.C. board
62
Screw of the
P.B. support and
the separator
Screws of the
terminal block
support and
the back panel
Lead wires of the
defrost heater
Screws of
the earth wire