Samsung AC018JN4DCH/AA Service Manual page 71

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.
Samsung Electronics
Yes
Yes
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
Check the connection of CN43.
[RC090/100/125/140/145
AC FCA
Replace the temperature sensor,
No
After confirming the state is normal, end the service.
OLP sensor: 200kΩ at 25
Discharge sensor: 200kΩ at 25
COND. sensor: 10kΩ at 25
Outdoor unit temperature sensor:
10kΩ at 25
[RC090/100/125/140/145
AC FCA
(Example) COND. sensor/outdoor unit temperature sensor measuring resistance value by temperature: E231, E221
Current
Resistance
temperature temperature
(KΩ)
(°C)
70 4
60 5
50 6
40 7
30 8
(Example) OLP sensor/discharge temperature sensor measuring resistance value by temperature: E320, E251.
Current Current
Resistance
temperature temperature
(KΩ)
(°C)
80 40
70 50
60 60
50 90
40 110
After confirming the state is normal,
No
Troubleshooting
Description
reconnected?
Check the connection of
CN501 and CN502.
, [RC072DHXB ]
]
Power ON.
Discharge sensor: 200kΩ at 25°C
Outdoor unit temperature sensor:
10kΩ at 25°C
COND. sensor: 10kΩ at 25°C
OLP sensor: 200kΩ at 25°C
, [RC072DHXB ]
]
Current e.g.) Room temperature: 26
Resistance
- Resistance: 10.28 KΩ
(KΩ)
(°C)
20 10
10 20
0 30
-10 40
e.g.) Room temperature: 21
Resistance
- Resistance: 205.4 KΩ
(KΩ)
(°C)
30 180
20 220
10 320
0 550
end the service.
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