Cause : Supply unit starts warning comes when warning generated by an edge counter. This is a programmable warning for more information check parameter : 133.35 Edge counter 1 warning selection 133.45 Edge counter 2 warning selection

Check the event log for an auxiliary code. Check the source of the warning corresponding to the code:

1. 2: 133.33 Edge counter 1 source
2. 3: 133.43 Edge counter 2 source.