Samsung AQ09VFUAGM/CV Service Manual page 75

Outdoor temperature sensor error
Indoor display
Outdoor display
1.Checklist :
1) Is the sensor connected correctly?
2) Is the sensor placed correctly?
3) Does the both terminal of sensor satisfy the resistance value in accordance with temperature?
4) Is the resistance value of sensor connection pull-up correct?
2-1. Troubleshooting procedure (A*V18***)
Is the sensor connector(CN251)
connected correctly in accordance
with a color(BLU,6PIN)?
YES
Is the sensor resistance value #1-#2
10kohm±3% at the room
temperature of 25
YES
Connect the sensor to PBA connector (6pin)
supply power and measure the voltage of #1-#2 in
the connector
Below 0.5V or Over 4.5V?
NO
Micom error or connector check
YES
Exchange the Outdoor PBA
Is the sensor connector(CN502)
connected correctly in accordance
with a color(RED,4pin)?
YES
Is the sensor resistance value #1-#2
10kohm±3% at the room
temperature of 25
YES
Connect the sensor to PBA connector(4pin)
supply power and measure the voltage of #1-#2 in
the connector
Below 0.5V or Over 4.5V?
NO
Micom error or connector check
YES
Exchange the Outdoor PBA
12- 8
Outdoor error
Outdoor temperature sensor
error
NO
Reconnect the sensor connector.
Sensor Replace
Sensor resistance value : 20
NO
YES
Exchange the Outdoor PBA
NO
Reconnect the sensor connector.
Sensor Replace
Sensor resistance value : 20
NO
YES
Exchange the Outdoor PBA
- 12.09kohm
30 - 8.31kohm
35 - 6.94kohm
40 - 5.83kohm
- 12.09kohm
30 - 8.31kohm
35 - 6.94kohm
40 - 5.83kohm