Outdoor Sensor Error(Error Code : E221, E231, E251, E320) - Samsung AC009BNLDCH Service Manual

Troubleshooting

4-4-11. Outdoor sensor error(Error Code : E221, E231, E251, E320)

Outdoor Unit display
Wired remote Control, Wind Free RAC
Duct, 1way Cassette
Display
Duct
Blue Red
1way
Blue Yellow
◑
X
Judgment
Refer to checking method, as shown below.
method
Symtom
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. → Power ON
→ After confirming the state is normal, end the service.
4-68
E221,E231,E251,E320
E221,E231,E251,E320
4way Cassette,
4way Cassette(600x600)
or
or
or
◑ ◑
X X X
Yes
Yes
Yes
MAX4
◑ ◑ ◑
X X
Error CODE
E221
E231
E251
E320
No
Reconnect the temperature sensor connector.
No
Replace the temperature sensor. → Power on.
→ Check the normal operation. → End the service.
Ex) COND. sensor/outdoor unit temperature sensor
measuring resistance value by temperature : E231, E221
Current temp
(°C)
70
60
50
40
30
Ex) Room temperature : 26℃ - Resistance : 10.28KΩ
Ex) OLP sensor/discharge temperature sensor measuring
resistance value by temperature : E320, E251
Current temp
(°C)
80
70
60
50
40
Ex) Room temperature : 21℃- Resistance : 205.4KΩ
No
After checking normal operation, end the service.
Console
◑ ◑
X X X
Description
Outdoor temperature sensor error
Outdoor temperature sensor error
Outdoor temperature sensor error
Outdoor OLP sensor error
Current temp
Resistance (kΩ)
(°C)
4 20
5 10
6 0
7 -10
8
Current temp
Resistance (kΩ)
(°C)
40 30
50 20
60 10
90 0
110
Samsung Electronics
360 Cassette
BLUE ◑
Resistance (kΩ)
10
20
30
40
Resistance (kΩ)
180
220
320
550