Err36 in danfoss VLT2800 drive indicates Overtemperature. This means the temperature inside the power module rises above 75 - 85 °C (depending on the device) the frequency converter will emit a warning, and the motor will continue to run unchanged.

1. If the temperature continues to rise, the switch frequency is reduced automatically. See Temperature-dependent switching frequency.
2. If the temperature inside the power module rises above 92 - 100 °C (depending on the unit) the frequency converter will cut out.
3. The temperature fault cannot be reset until the temperature has dropped to below 70 °C. The tolerance is ± 5 °C.