ACS580 trips 3220 DC Link Undervoltage, what to check first?
My ACS580 drive keeps tripping with a 3220 DC Link Undervoltage fault. It happens during operation, and I've noticed other equipment on the same supply reacting at the same time. What should I investigate first?
The ACS580 drive trips with a 3220 DC Link Undervoltage fault when the DC link voltage falls too low during modulation. This can be caused by a missing supply phase, a blown fuse, or a fault in the rectifier bridge. If the drive is stopped, the same condition is reported as warning A3A2. The fault can also occur if a power dip lasts longer than the drive's automatic restart time.
Likely causes and checks
1Missing supply phase or blown fuse
- Points to it
- The drive's DC link voltage is insufficient due to a missing supply phase or a blown fuse. This often coincides with other equipment on the same supply also reacting.
- Check
- Check the supply cabling, fuses, and switchgear for issues.
2Supply interruption longer than ride-through
- Points to it
- The drive trips after short power dips because the supply interruption lasted longer than the configured automatic restart time, even if automatic restart is enabled.
- Check
- Compare the length of the dip with parameter 21.18 Auto restart time (up to 10 s), and check if 30.31 Undervoltage control is enabled.
3Rectifier bridge fault
- Points to it
- The fault repeats even when the supply and fuses are confirmed to be healthy, indicating an internal issue with the drive's rectifier bridge.
- Check
- Refer to ABB service, as the rectifier is an internal component of the drive.
Next check: Given that other equipment on the same supply also reacts, the most likely cause is a missing supply phase or a blown fuse. Start by checking the supply cabling, fuses, and switchgear.
Related questions
Describe the fault or upload a photo, and InduQT checks it against the manufacturer manuals. Share the result here when it helps someone else.