A4 troubleshooting answers
1 question with answers cited from the manufacturer manuals.
- 0Danfoss FC 302 Alarm 4: what to check for mains phase loss?
Alarm 4 on a Danfoss VLT FC 302 indicates a missing phase on the supply side or excessive mains voltage imbalance. This alarm can also appear due to a fault in the input rectifier. It typically occurs while the drive is …