Troubleshooting
4-22 Samsung Electronics
Yes
Indoor unit display
(Operation) (Defrost) X (Timer) X (Filter)
Symptom Short or open circuit of indoor heat exchanger temperature sensor
Failure Short or open circuit in the corresponding sensor
4-3-2 Indoor heat exchanger temperature sensor (open/short)
Yes
No
No
In this case, is the resistance
value out of range in the temperature table
on the right?
Is the indoor heat exchanger
temperature sensor connector disconnected
from the PCB?
Restart the system after replacing the
PCB
Restart the system after
connecting the connector to PCB
Failure of the indoor heat exchanger
temperature sensor (replace)
Remove the indoor heat exchanger
temperature sensor connector from
the PCB and measure the resistance
between two terminals
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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