Removing R.v. Coil; Removing The Discharge Temperature Thermistor - Mitsubishi Electric MXZ-2A40VA Service Manual

OPERATING PROCEDURE
2. Removing the inverter assembly, inverter P.C. board
and power P.C. board
(1) Remove the top panel, cabinet and service panel.
(Refer to 1.)
(2) Disconnect the power supply and indoor/outdoor
connecting wire and remove the back panel. (Refer to 1.)
(3) Disconnect the ground wires(See Photo 2.), the lead wire
to the reactor and the following connectors;
<Power P.C. board>
CN912 (4-way valve)
<Inverter P.C. board>
CN931,CN932 (Fan motor)
CN661 (Defrost thermistor, discharge temperature
thermistor and outdoor heat exchanger
temperature thermistor)
CN663 (Ambient temperature thermistor)
CN791,CN792 (LEV A,LEV B)
(4) Remove the compressor connector (CN61).
(5) Remove the screws fixing the relay panel. (See Photo 2.)
(6) Remove the inverter assembly. (See Photo 2.)
(7) Disconnect all connectors and lead wires on the inverter
P.C. board. (See Photo 3.)
(8) Remove the inverter P.C. board from the inverter assembly.
(9) Remove the screw fixing the power P.C. board. (See Photo
3.)
(10) Disconnect all connectors and lead wires on the power P.C.
board.
(11) Remove the power P.C. board from the inverter assembly.

3. Removing R.V. coil

(1) Remove the top panel, cabinet and service panel.
(Refer to 1.)
(2) Disconnect the power supply and indoor/outdoor
connecting wire and remove the back panel. (Refer to 1.)
(3) Remove the inverter assembly. (Refer to 2.)
(4) Remove the R.V. coil. (See Photo 4.)

4. Removing the discharge temperature thermistor,

defrost thermistor
and outdoor heat exchanger
temperature thermistor
(1) Remove the top panel, cabinet and service panel.
(Refer to 1.)
(2) Disconnect the power supply and indoor/outdoor connecting
wire and remove the back panel. (Refer to 1.)
(3) Remove the inverter assembly. (Refer to 2.)
(4) Pull out the discharge temperature thermistor from its
holder. (See Photo 4.)
(5) Pull out the defrost thermistor from its holder. (See Photo 5.)
(6) Pull out the outdoor heat exchanger temperature thermistor
from its holder. (See Photo 5.)
Photo 2
Screws of the
relay panel
Photo 3
Heat sink
Photo 4
Discharge temperature thermistor
78
PHOTOS
Screws of
the ground
wires
Inverter
Power
P.C. board
P.C. board
Screw of the
power P.C. board
R.V. coil