90
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.
(5) Pull out the defrost thermistor from its holder (Photo 5).
(6) Pull out the outdoor heat exchanger temperature thermistor
from its holder (Photo 5).
Photo 4
OPERATING PROCEDURE
PHOTOS
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 earth wires, the lead wire to the reactor and
the following connectors;
<Power P.C. board>
CN912 (R.V coil)
<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.
(6) Remove the inverter assembly.
(7) Disconnect all connectors and lead wires on the inverter P.C.
board.
(8) Remove the inverter P.C. board from the inverter assembly.
(9) Remove the screw fixing the power P.C. board.
(10) Disconnect all connectors and lead wires on the power P.C.
board.
(11) Remove the power P.C. board from the inverter assembly.
Photo 2
Photo 3
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.
Screws of the
relay panel
Screws of
the earth
wires
Discharge temperature thermistor
R.V. coil
Screw of the
power P.C. board
Heat sink
Inverter
P.C. board
Power
P.C. board
Inverter
assembly
Compressor
connector
(CN61)
OBH554D
Summary of Contents for MXZ-2B30VA
Page 19: ...19 WIRING DIAGRAM 6 MXZ 2B30VA MXZ 2B40VA MXZ 2B52VA TB3 TB2 TB1 OBH554D ...
Page 20: ...20 MXZ 3B54VA OBH554D ...
Page 21: ...21 MXZ 3B68VA OBH554D ...
Page 22: ...22 MXZ 4B71VA OBH554D ...
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