Fault Diagnosis By Symptom - Samsung RHF025EE Service Manual

9-4 Fault Diagnosis by Symptom

9-4-1 Temperature Sensor Error(CN41)
Error Mode Indoor temperature sensor error (OPEN/SHORT)
Display
Check Method Temperature sensor disconnection or dislocation
Cause Connection electrodes contact, sensor disconnection or electric leakage
Sensor SPEC. 103 AT : 25˚C 10KΩ
E121 (E221) code appears when unit operation
starts or while it is in operation.
Is temperature sensor connector (CN41)
of PCB dislocated from PCB?
Yes
Detach the temperature sensor connector
from PCB, to measure resistance between the
two electrodes.
Yes
Is measured resistance
a lot different from the value
specified by the table besides?
Yes
Restart the unit after having
replaced PCB.
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No
Outdoor temperature
thermistor disorder(replacement)
Outdoor temperature sensor error (OPEN/SHORT)
No
Restart operation after link the
connector to PCB.
Temperature Resistance
(˚C) (kΩ)
70 2.2
60 3.0
50 4.2
40 5.8
30 8.3
20 12.1
10 18.0
0 27.3
-10 43.0
9-3