Outdoor Coil Temperature Sensor Error - Samsung AQV18UGAX Service Manual

12-2-8.Outdoor Coil 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?
Isthe sensor connector(CN251)
2-1. Troubleshooting procedure (ASV18P**)
connected correctly in accordance
with a color(BLU,6PIN)?
YES
Isthe sensor resistance value #5
10kohm ± 3% at the room
temperature
of 25 ℃
YES
Connectthe sensor to PBA connector (6piin)
supply power and measure the voltage of #5
the connector
Below 0.5V or Over 4.5V?
NO
Micom error or connector check
YES
Exchangethe Outdoor PBA
Isthe sensor connector(CN501)
connected correctly in accordance
with a color(WHT,4pin)?
YES
2-2. Troubleshooting procedure (ASV24P**)
Isthe sensor resistance value #3
(CN501) 10kohm± 3% at the room
temperature of 25 ℃
YES
Connectthe sensor to PBA connector(4pin)
supply power and measure the voltage of #3
the connector
Below 0.5V or Over 4.5V?
NO
Micom error or connector check
YES
Exchangethe Outdoor PBA
⊙ ○ ⊙ Outdoor error
⊙ ● ⊙ Outdoor Coil temperature sensor error
-#6
-#6 in
-#4
-#4 in
NO
Reconnect the sensor connector.
Sensor Replace
Sensorresistance value : 20
NO
YES
Exchangethe Outdoor PBA
NO
Reconnect the sensor connector.
Sensor Replace
Sensorresistance value : 20
NO
YES
Exchangethe Outdoor PBA
℃ -12.09kohm
30℃ -8.31kohm
35℃ -6.94kohm
40℃ -5.83kohm
℃ -12.09kohm
30℃ -8.31kohm
35℃ -6.94kohm
40℃ -5.83kohm
12-9