Troubleshooting steps
Check input power verify all three phases check fuses and breakers
ABB VFD
2312 – Undervoltage
DC bus undervoltage
Details
DC link voltage dropped below minimum operating threshold.
Error typealarm
MeaningUndervoltage
Typical causesInput power loss low input voltage phase loss
SolutionsCheck input power verify all three phases check fuses and breakers
Severityhigh
Catalog references
Vendor Information
ABB2312
Utilities
Troubleshooting Steps
Related
Related ABB VFD Codes
FAQ
Common questions
What if it keeps happening?
Check power supply quality verify input voltage stability inspect input connections.