Cause : DC UNDERVOLTAGE comes when intermediate circuit DC voltage is not sufficient due to missing input power line phase, blown fuse, rectifier bridge internal fault or too low input power.

The F0006 code in your ABB ACS310 drive indicates a DC undervolt fault. This means the voltage level in the drive's internal DC link circuit has fallen below the minimum acceptable level for safe operation.

1. Check that undervoltage controller is on (parameter 2006 UNDERVOLT CTRL).
2. Check input power supply and fuses.