Troubleshooting
Samsung Electronics 4-5
Indoor unit display
(Operation) X (Defrost)
(Timer) X(Fan) X (Filter)
Wire remote controller display
E122, E123
Symptom
Error of EVA-IN,EVA-OUT sensor in the indoor unit(Open/Short)
Failure
Short or leakage of the EVA sensor
4-2-2 Eva in and out sensor (open/short)
Yes
No
No
In this case, is the resistance
value out of range in the temperature table
on the right?
Yes
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 tem-
perature (°C)
Resistance
(kΩ)
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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