Mitsubishi MUZ-A18YV Service Manual page 45

OPERATING PROCEDURE
2. Removing the inverter assembly, inverter P.C. board
and power board
(1) Remove the top panel, cabinet and service panel.
(Refer to 1.)
(2) Remove the back panel.(Refer to 1.)
(3) Disconnect the following connectors;
<Electronic control P.C. board>
CN931 and CN932 (Fan motor)
CN975 (LEV)
CN661 (Discharge temperature thermistor, defrost
thermistor and outdoor heat exchanger
temperature thermistor)
<Noise filter P.C. board>
CN912 (4-way valve)
(4) Remove the compressor connector.
(5) Remove the screws fixing the relay panel.
(6) Remove the inverter assembly.
(7) Disconnect all connectors and lead wires on the electronic
control P.C. board.
(8) Remove the electronic control P.C. board from the inverter
assembly.
(9) Remove the screws fixing the power board assembly.
(10) Disconnect all connectors and lead wires on the power
board.
(11) Remove the power board from the inverter assembly.
(12) Disconnect all connectors and lead wires on the noise filter
P.C. board.
(13) Remove the noise filter P.C. board from the inverter
assembly.
3. Removing R.V. coil
(1) Remove the top panel, cabinet and service panel.
(2) Remove the back panel. (Refer to 1.)
(3) Remove the inverter assembly. (Refer to 2.)
(4) Remove the R.V. coil. (Photo 9)
Photo 4
Screws of the power board assembly
Screws of the relay panel
45
PHOTOS