What to do if the ESAB 100i Welding System shows 'Missing AC Phase'?
- MMonica Phillips DDSAug 25, 2025
If the ESAB Welding System displays a 'Missing AC Phase' error, the possible causes include a blown wall fuse, a blown unit fuse F1 or F2 on the rear panel, a bad power cable connection, or a defective System Bias PCB. Check these components to resolve the issue.