Samsung AR09HSSDBWKNEU, Service Manual

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Samsung Electronics 10-3
10-2-2 Indoor temperature sensor Error
Indoor display
7-SEG DISPLAY DESCRIPTION
E121 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
YES
Exchange the indoor PBA
YES
Exchange the indoor PBA
NO
NO
Is the sensor resistance value
10kohm±3% at the room temperature
of 25°C
YES
Detach the assembled sensor from the PBA sensor
connector and measure the sensor resistance with
ohmmeter(tester)
Is the connection of power cable
and communication cable normal?
Ass'y Sensor Replace
Sensor resistance value : 20°C- 12.09kohm
30°C - 8.31kohm
35°C - 6.94kohm
40°C- 5.83kohm
Connect the sensor to PBA connector (6piin)
supply power and measure the voltage of #1-#2 in
the connector
Below 0.5V or Over 4.5V?
Micom error or connector check