External Sensor Error (Error Code: E221, E231, E251, E320) - Samsung AC048KXQPCC Service Manual

Troubleshooting

4-3-5 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
Power OFF
Is the temperature sensor connector
connected?
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. → After confirming the state is
normal, end the service.
4-12
Yes
(Example) COND. sensor/outdoor unit temperature sensor measuring resistance value by temperature: E231, E221
Current tem-
perature (°C)
Yes
(Example) OLP sensor/discharge temperature sensor measuring resistance value by temperature: E320, E251.
Current tem-
perature (°C)
Yes
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
Is the temperature sensor connector
No
Replace the temperature sensor, →
No
After confirming the state is normal, end the service.
Resistance Current tem- Resistance
(KΩ) perature (°C)
70 4 20
60 5 10
50 6 0
40 7 -10
30 8
Resistance Current tem- Resistance
(KΩ) perature (°C)
80 40 30
70 50 20
60 60 10
50 90 0
40 110
After confirming the state is normal,
No
Description
reconnected?
Power ON. →
e.g.) Room temperature: 26℃
(KΩ)
- Resistance: 10.28 KΩ
10
20
30
40
e.g.) Room temperature: 21℃
(KΩ) - Resistance: 205.4 KΩ
180
220
320
550
end the service.
Samsung Electronics