Samsung AR09TXFCAWKNEU Service Manual page 90

10-2-2 Indoor temperature sensor Error
Indoor display
7 SEG DISPLAY
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 the assembledsensorfromthe PBAsensor
connector and measure thesensor resistancewith
10kohm±3% atthe room temperature
Connect the sensor to PBA connector (6piin)
supply power and measure the voltage of #1-#2 in
DESCRIPTION
ohmmeter(tester)
Is the sensor resistancevalue
of 25°C
YES
the connector
Below 0.5V orOver4.5V?
NO
Micom erroror connector check
YES
Exchange the indoorPBA
NO
Ass'y Sensor Replace
Sensor resistancevalue : 20°C- 12.09kohm
YES
Exchange the indoorPBA
30°C - 8.31kohm
35°C - 6.94kohm
40°C- 5.83kohm
SAMSUNG ELECTRONICS
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