Meaning of the indication
The indication belongs to the line converter or input-side conversion boundary. On larger ABB systems this may require distinguishing the motor-side control panel context from the line-side converter control context.
Checking order
- Identify whether the installation is a simple standard drive or part of a larger converter/cabinet arrangement.
- Confirm input supply, fuses, precharge and line-converter status before investigating the motor-side output bridge.
- Check whether the panel or fault reference is currently addressing a line-side unit.
- Inspect line-side boards, contactors and supply feedback only after safe isolation.
- Collect type-code and cabinet photos before quoting a replacement board.
Suspect areas
Line converterInput supply pathLine-side control boardPrecharge/contactor sequencePanel unit selection