Mitsubishi Electric MUZ-FD25VABH - E1 Service Manual page 57

Mitsubishi ilmalämpöpumput huoltaa ja korjaa: Jäähdytinpalvelu RefGroup Oy
OPERATING PROCEDURE
2. Removing the inverter assembly, outdoor electric
control P.C. board, power board, noise filter P.C.
board and reactor.
(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)
CN795 (LEV)
CN661 (Discharge temperature thermistor, defrost thermis-
tor and outdoor heat exchanger temperature ther-
mistor)
CN663 (Ambient temperature thermistor)
<Noise filter P.C. board>
CN912 (R.V. coil)
(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 outdoor electronic control P.C. board from the
inverter assembly.
(9) Disconnect the reactor lead wire.
(10) Remove the screws of the reactor, and remove the reactor.
(11) Remove the screws fixing the power board assembly.
(12) Disconnect all connectors and lead wires on the power
board.
(13) Remove the power board from the inverter assembly.
(14) Disconnect all connectors and lead wires on the noise filter
P.C. board.
(15) Remove the noise filter P.C. board from the inverter assem-
bly.
Photo 3 (Inverter assembly)
Photo 4
57
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PHOTOS
Screws of the power board assembly
Screws of the relay panel
Screws of the reactor