External Sensor Error (Error Code: E221, E231, E251, E320) - Samsung AC140JXADGH/EU Service Manual

4-3-12 External Sensor Error (Error Code: E221, E231, E251, E320)

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