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Mitsubishi Electric MUZ-GE09NA Service Manual page 68

Split-type air conditioners; outdoor unit
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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:
CN641 (Defrost thermistor (MUZ) and discharge temperature
thermistor)
CN643 (Ambient temperature thermistor)
CN644 (Outdoor heat exchanger temperature thermistor)
CN721 (R.V.coil) (MUZ)
CN724 (LEV)
CN931, CN932 (Fan motor)
(3) Remove the compressor connector (CN61).
(4) Remove the screws fixing the heat sink support and the sep-
arator.
(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 and screw 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 remove 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 connectors:
CN721 (R.V. coil) (MUZ)
(3) Remove the R.V. coil.
OBH549F
Photo 3
Photo 4 (Inverter assembly)
Heat sink
Inverter P.C. board
Hook of the P.C.
board support
Heat sink support
Hook of the P.C.
board support
Photo 5
Brazed parts of 4-way valve
68
PHOTOS
Screw of the heat sink
support and the separator
Screws of
the terminal
block support
and the back
panel
Screws of
the reactor
Screw of the
terminal block
P.C. board
support
support
Screw of the
ground wire
Screw of the P.C.
Terminal block
board fixture
support
R.V. coil (MUZ)
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