What causes the Altivar ATV28, ATV31 and ATV312 drives to show all 888's on the front display?
8.8.8 code on display of drive.
ATV28, ATV31, Altivar 28, and Altivar 31.
If you see all 888's on the main display first power cycle the drive to see if they will clear. If they will not clear than you may need to replace the drive there could be an issue with the main control board.