Troubleshooting
Samsung Electronics 4-21
Indoor unit display X (Operation) (Defrost) X (Timer) X (Filter)
Symptom In case of open or short circuit of indoor temperature sensor
Failure Short or leakage of the corresponding sensor
Yes
No
No
In this case, is the resistance
value out of range in the temperature
table on the right?
Yes
Is indoor temperature
sensor disconnected from the
connector in PCB?
Restart the system after replacing the PCB
Restart the system after connecting
to the PCB connector
Indoor temperature sensor
failure (replace)
Remove the indoor temperature sensor
connector from the PCB and measure the
resistance between two terminals
4-3 Troubleshooting by symptoms
4-3-1 Indoor temperature sensor (open/short)
Current
temperature
(°C)
Resistance
40 5.800
35 6.900
30 8.300
25 10.00
20 12.10
15 14.70
10 18.00
5 22.00
0 28.30
-5 33.90
-10 42.30
<Temperature sensor
resistance value>
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