49
Installation and Maintenance
Service Manual
●Indoor unit:
9.2 Troubleshooting for Main Malfunction
1. Malfunction of Temperature Sensor F1, F2
Troubleshooting for
F1,F2 malfunction
Is
the wiring terminal between the
temperature sensor and the controller
loosened or poorly contacted?
Insert the temperature
sensor tightly
yes
Is malfunction
eliminated
Is there short circuit due to trip-over of
the parts?
Make the parts upright
yes
Is malfunction
eliminated
Replace the mainboard
with the same model.
End
no
no
Is the
temperature sensor normal according
to the Resistance
Table?
no
Replace it with a
temperature sensor
with the same model
no
yes
yes
Is malfunction
removed
no
yes
yes
no
Main.detection.points:
ƽ
Is.the.wiring.terminal.between.the.temperature.sensor.and.the.controller.loosened.or.poorly.contacted?
ƽ
Is.there.short.circuit.due.to.trip-over.of.the.parts?
ƽ
Is.the.temperature.sensor.broken?
ƽ
Is.mainboard..broken?
Malfunction.diagnosis.process:
1. Malfunction of Temperature Sensor F1, F2
Main detection points:
● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted?
● Is there short circuit due to trip-over of the parts?
● Is the temperature sensor broken?
● Is mainboard broken?
Malfunction diagnosis process:
Is the wiring terminal between the
temperature sensor and the controller
loosened or poorly contacted?
Start
Insert the temperature
sensor tightly
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Is malfunction
eliminated
Is malfunction
eliminated
Is malfunction
eliminated
Replace it with a
temperature sensor with
the same model
Make the parts upright
Is there short circuit due to trip-
over of the parts
Is the temperature sensor normal
according to the resistance table?
Replace the mainboard with
the same model.
End
