142
OPERATING PROCEDURE
PHOTOS
5. Removing the thermistor
Discharge temperature thermistor, defrost temperature,
evaporator temperature, high pressure protector,
gas pipe temperature A and gas pipe temperature B
(1) Remove the top panel, service panel, front panel.
(2) Remove Indoor/outdoor connecting wire and power supply
cable.
(3) Remove thermistor connector (CN661, CN662) from the
electronic control P.C. board.
(4) Remove the inverter assembly.
(5) Remove the thermistor in the upper part of compressor.
(6) Remove the back panel.
(7) Remove the thermistors for defrost temperature, evaporator
temperature, gas pipe temperature A and gas pipe
temperature B.
Fin temperature thermistor
(1) Remove the top panel, service panel and front panel.
(2) Remove the connector coming out of the compressor.
(3) Remove the compressor connector coming out of the
electronic control P.C. board. (Fig. 1)
(4) Remove the electronic control P.C. board.
(5) Remove the screws fixing the heat sink from the electronic
control P.C. board. (Tightening torque IPM: M4 1.18
I
0.2[Nm] DS: M3 0.78
I
0.2[Nm] AFM: M3.5 0.98
I
0.2[Nm])
Caution: Be sure to keep silicon oil applied between the
heat sink and the electronic control P.C. board away from
dirt etc.
Do not wipe off silicon oil.
Otherwise the temperature of the electronic control P.C. board
may rise unusually.
Photo 7
Photo 8
Photo 9
Defrost thermistor
Terminal
cover
Discharge temperature thermistor
Gas pipe
temperature
thermistor
A, B
Defrost
temperature
thermistor
High pressure protector thermistor
Evaporator temperature thermistor
Fin temperature thermistor
Heat sink
OB307A5.qxp 03.2.19 4:15 PM Page 142
