Outdoor Temperature Sensor Error - Samsung AM040KXMDEH/EU Service Manual

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