Cause : Input phase loss comes when input phase loss detected by the IGBT bridge. A 3E00 fault code in your ABB ACS880 drive indicates an input phase loss. This means the drive isn't detecting all three phases of the incoming AC power supply.

1. Check the auxiliary code.
2. Check the source of the fault corresponding to the code: 1: Phase A, 2: Phase B, 4: Phase C, 8: Phase cannot be detected.
3. Check the AC fuses.
4. Check for input power supply imbalance.