Samsung ASV18PULNXEA Service Manual page 73

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?
Is the sensor connector(CN251)
2-1. Troubleshooting procedure (A*V18***)
connected correctly in accordance
with a color(BLU,6PIN)?
Is the sensor resistance value #1-#2
10kohm±3% at the room
temperature
of 25℃
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?
Micom error or connector check
Exchange the Outdoor PBA
Is the sensor connector(CN502)
connected correctly in accordance
with a color(RED,4pin)?
Is the sensor resistance value #1-#2
2-2. Troubleshooting procedure (A*V24***)
10kohm±3% at the room
temperature of 25℃
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?
Micom error or connector check
Exchange the Outdoor PBA
12-8
⊙ ○ ⊙
⊙ ○ ⊙
YES
YES
NO
YES
YES
YES
NO
YES
Outdoor error
Outdoor temperature sensor
error
NO
NO
YES
NO
NO
YES
Reconnect the sensor connector.
Sensor Replace
Sensor resistance value : 20℃ - 12.09kohm
30℃ - 8.31kohm
35℃ - 6.94kohm
40℃ - 5.83kohm
Exchange the Outdoor PBA
Reconnect the sensor connector.
Sensor Replace
Sensor resistance value : 20℃ - 12.09kohm
30℃ - 8.31kohm
35℃ - 6.94kohm
40℃ - 5.83kohm
Exchange the Outdoor PBA