ST500 | Err.12, what does this message mean and what can you do?
If the error message Err.12 appears on the frequency inverter display, it indicates a phase loss at the input.
Causes:
- This message occurs if the mains voltage collapses, the input circuit does not function properly, the control circuit does not function properly, or the quality of the mains voltage is too low.
Solutions:
- Reduce the load on the mains.
- Install a line reactor (input choke).