Troubleshooting By Symptoms - Samsung AC100JNCDEH/EU Service Manual

4-3 Troubleshooting by symptoms

4-3-1 Indoor temperature sensor (open/short)
Wire remote controller display
Symptom
Failure
Is indoor temperature
sensor disconnected from the
connector in PCB?(CN412)
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
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E121
Error of Room sensor in the indoor unit(Open/Short)
Short or leakage of the Room sensor
Yes
Restart the system after connecting
Yes
Indoor temperature sensor
to the PCB connector
<Temperature sensor
resistance value>
Current
temperature
(°C)
failure (replace)
-10
Troubleshooting
Resistance
(kΩ)
40 5.800 ±3%
35 6.900 ±3%
30 8.300 ±3%
25 10.00 ±3%
20 12.10 ±3%
15 14.70 ±3%
10 18.00 ±3%
5 22.00 ±3%
0 28.30 ±3%
-5 33.90 ±3%
42.30 ±3%
4-13