Samsung AC071MN4PKH - Indoor Heat Exchanger Temperature Sensor Error (E122)

Troubleshooting
4-27
4-4-3. Indoor heat exchanger temperature sensor error (E122)
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
temperature(°C)
Resistance
(k)
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>
Indoor unit display 360 Cassette
x(Ice blue) ◑(Yellow green) x(Blue) ◑(Red)
Judgment method Refer to checking method, as shown below
Symptom If the short or open circuit of indoor heat exchanger temperature sensor.