nErr
Speed control error
Lenze · SM29_05 Service Bulletin
What does nErr mean?
The motor speed is out of the tolerance margin defined by C0576. This typically occurs due to an excessively high active load (e.g., in hoists) or mechanical blockades, preventing the drive from achieving the commanded speed.
Source: Lenze SM29_05 Service Bulletin
Open Manual (Page 331)