51

AMA Check Unom and Inom Failed

Danfoss · VLT HVAC Drive FC 102

What does 51 mean?

During the Automatic Motor Adaptation (AMA) process, the drive detected an inconsistency with the nominal voltage (Unom) and/or nominal current (Inom) parameters, indicating incorrect motor data entry. This prevents accurate motor modeling.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Re-run the AMA procedure after correcting any parameter discrepancies.

Source: Danfoss VLT HVAC Drive FC 102
View Official PDF