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SAMSUNG ELECTRONICS
9-2-2 Indoor temperature sensor Error
Indoor display
7 SEG DISPLAY DESCRIPTION
C121 Indoor room temp sensor error
1. Checklist :
1) Is the indoor units temperature sensor connected correctly?
2) Is the sensor placed correctly?
3) Does the both terminal of sensor satisfy the resistance value in accordance with temperature?
2. Troubleshooting procedure
Detach theassembledsensorfromthe PBA sensor
connectorandmeasure the sensorresistancewith
ohmmeter(tester)
YES
ExchangetheindoorPBA
YES
ExchangetheindoorPBA
NO
NO
Is the sensorresistancevalue
10kohm±3% at the roomtemperature
of 25°C
YES
Ass'y Sensor Replace
Sensor resistancevalue : 20°C- 12.09kohm
30°C - 8.31kohm
35°C - 6.94kohm
40°C- 5.83kohm
Connectthesensorto PBA connector (6piin)
supply power andmeasure the voltage of #1-#2 in
theconnector
Below 0.5V orOver4.5V?
Micom error orconnectorcheck
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