Troubleshooting
Samsung Electronics
35
3-4 Outdoor temperature sensor error
(Error Code : E221, E231, E251, E269)
1. Check items
1) Check the temperature sensor connector
2) Check the resistance value of outdoor temperature
2. Check procedure
Error code
Error explanation
Error code
Error explanation
E221
Outdoor unit temperature sensor Error
E320
Indoor unit OLP sensor Error
E231
Outdoor unit COND.sensor Error
E308
Suction temperature sensor error
E251
Outdoor unit discharge sensor Error
E311
Double tube temperature sensor error
Turn off the power
No
Yes
Yes
No
If the resistance value measure
on temperature sensor similar to the values on
the table on the right side?
Check if everything is normal and end service
No
Yes
Change the outdoor unit PBA
o
Turn on the power
o
Check if everything is normal and end service
Is the temperature sensor
connector properly connected?
If the resistance value measure
on temperature sensor similar to the values
on the table on the right side?
Connect the temperature sensor connector
Change the temperature sensor
o
Turn on the
power
o
Check if everything is normal and end
service
(Ex.) Resistance value for temperatures measured by Cond. Sensor/
outdoor temperature sensor : E231, E221
(Ex.) Resistance value for temperatures measured by OLP Sensor/
Discharge sensor: E320, E251
Current
Temp. (°C)
Resistance
(kΩ)
Current
Temp. (°C)
Resistance
(kΩ)
70
4
20
10
60
5
10
20
50
6
0
30
40
7
-10
40
30
8
Current
Temp. (°C)
Resistance
(kΩ)
Current
Temp. (°C)
Resistance
(kΩ)
80
40
30
180
70
50
20
220
60
60
10
320
50
90
0
550
40
110
Ex) Temperature 26°C –
Resistance 10.28kΩ
Ex) Temperature 21°C –
Resistance 205.4kΩ
OLP sensor: 200kΩ at 25°C
Discharge sensor: 200kΩ at 25°C
COND. sensor: 10kΩ at 25°C
Outdoor unit temperature sensor: 10kΩ at 25°C
OLP : 200Kohm at 25°C
D-tube : 10Kohm at 25°C
Check the CN43 connection
Check the CN44 connection
