Troubleshooting
116 Electrical Control
2.3. Solving steps for typical malfunction
(1) For indoor unit
a. Indoor room temperature T1 and sensor evaporator temperature sensor T2 is abnormal
b. Condenser temperature sensor T3 is abnormal
Is connection to connector of temp. sensor good?
Check the resistance of the temp. sensor according to Appendix 1
Repair connector
No
Yes
Is it the resistance is normal?
Indoor PCB is defective.
Replace the sensor
Yes No
Is connection to connector of temp. sensor good?
Check the resistance of the temp. sensor according to Appendix 1
Repair connector
No
Yes
Is it the resistance is normal?
Indoor PCB is defective.
Replace the sensor
Yes
No
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