Samsung AM036FXMDCH - Outdoor Temperature Sensor Error (Error Code: E221, E231, E251, E269)

Troubleshooting
24 Samsung Electronics
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 outdWoor temperature
3) When E221 occurs, please recheck display two minutes later.
If E221 is displayed two minutes later, please follow the below check produre.
If E441 is displayed two minutes later, please follow E441 check produre.
2. Check procedure
Turn off the power
Connect the temperature sensor connector
No
Yes
Yes
Change the temperature sensor o Turn on the power
o Check if everything is normal and end service
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
(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
Check the CN43 connection Check the CN44 connection
Is the temperature sensor
connector properly connected?
Ex) Temperature 26°C –
Resistance 10.28kΩ
Ex) Temperature 21°C –
Resistance 205.4kΩ
If the resistance value measure
on temperature sensor similar to the values on the
table on the right side?
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
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