Mitsubishi Electric SUZ-KA18NA2 Service Manual page 36

OPERATING PROCEDURE
2. Removing the inverter assembly, inverter P.C. board
(1) Remove the cabinet and panels. (Refer to 1.)
(2) Disconnect the lead wire to the reactor and the following con-
nectors:
<Inverter P.C. board>
CN721 (R.V. coil)
CN722 (Defrost heater) (SUZ-KA18NAH2)
CN931, CN932 (Fan motor)
CN601(Defrost heater) (SUZ-KA24/30/36NAH2)
CN641 (Defrost thermistor and discharge temperature ther-
mistor)
CN643 (Ambient temperature thermistor)
CN644 (Outdoor heat exchanger temperature thermistor)
CN724 (LEV)
(3) Remove the compressor connector.
(4) Remove the screw fixing the heat sink support and the sepa-
rator.
(5) Remove the fixing screws of the terminal block support and
the back panel.
(6) Remove the inverter assembly.
(7) Remove the screw of the ground wire, screw of the P.C.
board cover and screws of the terminal block support.
(8) Remove the heat sink support from the P.C. board support.
(9) Remove the screw of the inverter P.C. board and the inverter
P.C. board from the P.C. board support.
3. Removing R.V. coil
(1) Remove the cabinet and panels. (Refer to 1.)
(2) Disconnect the following connector:
<Inverter P.C. board>
CN721 (R.V. coil)
(3) Remove the R.V. coil.
Photo 7
OCH688D
Photo 5
Screw of the heat sink
support and the separator
Photo 6-1 (KA18)
Heat sink
Inverter P.C. board
Screw of the inverter P.C. board
Screw of
Photo 6-2 (KA24/30/36)
the R.V. coil
Inverter P.C board
Brazed parts of
4-way valve
Screws of
the P.B.
support
Screw of
the relay
panel
36
PHOTOS/FIGURES
Screws of the terminal block
support and the back panel
Screws of
the earth wire
Heat sink support
P.C. board support
Screws of the relay panel
Screw of the P.B. support
Earth wires