3
Power Loss
Allen-Bradley · PowerFlex 700
What does 3 mean?
The DC bus voltage remained below 85% of nominal for longer than the configured [Power Loss Time]. This indicates a sustained sag or interruption of the incoming AC line power. This fault can be enabled/disabled with [Fault Config 1].
Common Causes
- Loss of primary power supply to the industrial equipment.
- Internal power supply unit failure.
- Tripped circuit breaker or blown fuse.
- Interruption of power during operation.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Monitor the incoming AC line for low voltage conditions or power interruptions.
Verified technical data. Last updated: March 2026
Related Faults
Source: Allen-Bradley PowerFlex 700