Mitsubishi Electric MUZ-LN35VGHZ2-E1 Service Manual page 74

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 con-
nectors:
<Inverter P.C. board>
CN721 (R.V. coil)
CN931, CN932 (Fan motor)
CN641 (Defrost thermistor and discharge temperature ther-
mistor)
CN643 (Ambient temperature thermistor)
CN644 (Outdoor heat exchanger temperature thermistor)
CN724 (Expansion valve coil)
CN722 (Defrost heater and heater protector)
CN64 (Compressor protector)
(3) Remove the compressor connector (CN61).
(4) Remove the screws fixing the heat sink support and the sep-
arator.
(5) Remove the fixing screw of the P.B. support and the separa-
tor.
(6) Remove the fixing screws of the terminal block support and
the back panel.
(7) Remove the inverter assembly.
(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.
Connection procedure when attaching the inverter P.C.
*
board (Photo 5)
1. Connect the lead wires of the heat exchanger temperature
thermistor to the connector on the inverter P.C. board. Pull
the lead wires of the heat exchanger temperature thermis-
tor toward you and put them on the left hook on the P.C.
board support so that the other lead wires are bundled up
as shown in Photo 5.
2. Connect the lead wires of the expansion valve coil to the
connector on the inverter P.C. board. Pull the lead wires of
the expansion valve coil toward you and put them on the
right hook on the P.C. board support so that the other lead
wires are bundled up as shown in Photo 5.
Photo 5
Lead wires of the heat
exchanger temperature
thermistor
Inverter P.C.
board support
Fix the lead wires of the
compressor protector
and the discharge
temperature thermistor.
OBH768G
Lead wires of the
expansion valve coil
Connector of
the compressor
protector
Clamp the
end of the
compressor
protector's
tube.
Fold back the
tube of the
compressor
protector.
Cut the surplus
of the fastener
to prevent it
from hitting the
front panel.
Pass the lead wire of compressor
protector through the top felt hole.
PHOTOS/FIGURES
Photo 4
Ambient temperature
thermistor
Screw of the heat sink
support and the separator
Photo 6 (Inverter assembly)
Heat sink support
Heat sink P.C. board support
Inverter P.C. board
Photo 7
74
Screw of the P.B. support
and the separator
Screws of
the terminal block
support and
the back panel
Screws of the
earth wire
Screw of the inverter P.C. board
Lead wires of the
defrost heater