4-12
Samsung Electronics
4-3 Fault Diagnosis by Symptom
4-3-1 Indoor temperature sensor (open/short)
Indoor unit display
X(Operation) X(Defrost)
(Reservation) X(Fan) X(MPI)
Criteria
In case of disconnection or short-circuit of the indoor temperature sensors
Cause of problem
Disconnection or short-circuit of the relevant sensors
Yes
No
No
At that time,
does the resistance value deviate from the
temp. table beside?
Yes
Is indoor temp. sensor
connector disconnected?
Resume operation after replacing PCB
Resume operation
after connecting to the
connector PCB
Indoor temp. sensor
self-defect (replacement)
Disconnect the PCB from the
connector of the internal temp. sensor
and then measure the resistance
between the two terminals.
ex) Room temperature
26°C~ resistance 09.26KΩ
<Temperature sensor
resistance values>
Current
Temp. (°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
