Samsung AM040FXMDEH - Troubleshooting: E221-E269 Sensor Errors

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
(k)
Current
Temp. (°C)
Resistance
(k)
70 4 20 10
60 5 10 20
50 6 0 30
40 7 -10 40
30 8
Current
Temp. (°C)
Resistance
(k)
Current
Temp. (°C)
Resistance
(k)
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: 200k at 25°C
Discharge sensor: 200k at 25°C
COND. sensor: 10k at 25°C
Outdoor unit temperature sensor: 10k at 25°C
OLP : 200Kohm at 25°C
D-tube : 10Kohm at 25°C
Check the CN43 connection
Check the CN44 connection