Troubleshooting By Symptoms; Indoor Temperature Sensor (Open/Short) - Samsung AC018KNZDCH/AA Service Manual

Troubleshooting

4-2 Troubleshooting by symptoms

4-2-1 Indoor temperature sensor (open/short)

Indoor unit display
Wire remote controller display
Symptom
Failure
Is indoor temperature
sensor disconnected from the
connector in PCB?
No
Remove the indoor temperature sensor
connector from the PCB and measure the
resistance between two terminals
In this case, is the resistance
value out of range in the temperature
table on the right?
No
Restart the system after replacing the PCB
4-4
X (Operation) X (Defrost)
E121
Error of Room sensor in the indoor unit(Open/Short)
Short or leakage of the Room sensor
(Timer) X(Fan) X (Filter)
Yes
Restart the system after connecting
to the PCB connector
Yes
Indoor temperature sensor
failure (replace)
<Temperature sensor
resistance value>
Current tem- Resistance
perature (°C) (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
Samsung Electronics