Samsung AC018KN4DCH Service Manual page 83

4-4-13. Compressor down due to freezing control (Error Code : E403)
1. Test items
1) Check the normal operation of indoor Fan/Motor.
2) Check the normal operation of indoor EEV.
3) Check the IN/OUT sensor of indoor heat exchanger.
3) Check the clogging of indoor air inlet part.
2. Check procedure
Is the indoor Fan/Motor normal operation?
Is the sensor on indoor heat exchanger
display the temperature correctly?
Check the clogging of indoor air inlet part.
Yes
Yes
4-43
No
Check the relevant indoor Fan
No
Refer to other temperature sensor error section
to check for error.
Troubleshooting