CHECKING FLOW CHART BY FAILURE
Sensing Fail, F1, F2?
Unplug the unit
1
Is the Connector
disconnected or loose?
1. Sensor connection
2. CN31 of Main PCB
CN31
No
Reconnect
Yes
or adjust the
connection
Sensor
connection
9-13
2
Is the resistance of
thermistor normal?
Check:
Pins 4 and 5 of CN31 wiring in main PCB
Normal- approximately 1.09kΩ at 25˚C
Yes
Replace the
No
defective
Thermistor
Yes
CN13
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