C511T | What does E2 error mean?

Error E2 indicates a temperature sensor fault. Check if the temperature sensor is properly connected to the thermostat NTC connection.

If the temperature sensor is connected to the thermostat correctly and error E2 is still displayed, disconnect the sensor from the thermostat and measure its resistance. The resistance of the sensor should correspond to the values given in the table.

NTC 12K Ω@250 Celsijus
*Celsius * Farenheit ΩOmh
-10 14 63929
0 32 37942
10 50 23364
20 68 14871
30 86 9752