Samsung AC052MN4DKH Service Manual page 66

1. Test items
1) Check the connection of the temperature sensor connector.
2) Check the resistance value of the temperature sensor.
2. Check procedure
Power OFF
Is the temperature sensor connector
connected?
Is the temperature sensor measuring
resistance similar to the table on the left?
Does same error occur again after power ON?
Replace the outdoor unit PCB.
After confirming the state is normal, end the service.
Samsung Electronics
Yes
Ex) COND. sensor/outdoor unit temperature sensor measuring resistance value by temperature :
Yes
Ex) OLP sensor/discharge temperature sensor measuring resistance value by temperature :
Yes
Power ON
Error CODE
E221
E231
E251
E320
No
Reconnect the temperature sensor connector.
Replace the temperature sensor.
No
Check the normal operation.
E231, E221
Current temp(°C) Resistance(kΩ) Current temp(°C)
70 4
60 5
50 6
40 7
30 8
E320, E251
Current temp(°C) Resistance(kΩ) Current temp(°C)
80 40
70 50
60 60
50 90
40 110
No
Description
Outdoor temperature sensor error
Outdoor temperature sensor error
Outdoor temperature sensor error
Outdoor OLP sensor error
End the service.
Ex) Room temperature :
Resistance(kΩ)
26
20 10
10 20
0 30
-10 40
Ex) Room temperature :
Resistance(kΩ)
21 - Resistance : 205.4KΩ
30 180
20 220
10 320
0 550
After checking normal operation,
end the service.
Troubleshooting
Power on.
- Resistance : 10.28KΩ
4-31