Danfoss Refrigeration Error Codes
If faults are occurring on your Danfoss refrigeration system, it is very important to discover it quickly. Error codes are a great way to find out the initial problem. Error codes are usually displayed on the controller.
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Danfoss Refrigeration error codes:
| Alarm code | Possible cause | Solution |
| E0 | Cold room temperature sensor not working properly | • Check that cold room temperature sensor is working properly • If the problem persists replace the sensor |
| E1 | Defrost sensor not working properly (In this case defrosts will last time d3) | • Check that defrost sensor is working properly • If the problems persists replace the sensor |
| E2 | Eeprom alarm An EEPROM memory alarm has been detected (All outputs except the alarm one are deactivated) | • Switch unit off and then back on again |
| E8 | Man-in-room alarm | • Reset the alarm input inside the cold room |
| Ec | Compressor protection tripped (e.g. thermal protection or max pressure switch) (All outputs except the alarm one – where applicable – are deactivated) | • Check that compressor is working properly • Check compressor absorption • If the problem persists contact the technical assistance |
| Ed | Open door – alarm (Open door and tdo-time has expired) | Check door / door contact |
| Temperature shown on display is flashing | Minimum or maximum temperature alarm. The temperature inside the cold room has exceeded the min. or max. temperature alarm setting (see variables A1 and A2, user programming level) | • Check that the compressor is working properly. • Sensor not reading temperature properly or compressor start/stop control not working. |
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