F4 · PowerFlex 40
For F4 · PowerFlex 40, brand is Allen-Bradley; model / series is PowerFlex 40; fault code is F4; fault name is UnderVoltage; cause is DC bus voltage fell below the minimum value, verified against its source on 2026-09-01.
- Brand
- Allen-Bradley
- Model / series
- PowerFlex 40
- Fault code
- F4 verified
- Fault name
- UnderVoltage verified
- Cause
- DC bus voltage fell below the minimum value. verified
- Corrective action
- Monitor the incoming AC line for low voltage or line power interruption. verified
Verified
Review by
What the source says
F4 UnderVoltage
— literature.rockwellautomation.com, retrieved 2026-09-01
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Cause
DC bus voltage fell below the minimum value.
Corrective action
Monitor the incoming AC line for low voltage or line power interruption.
— all from literature.rockwellautomation.com, retrieved 2026-09-01
Source
- literature.rockwellautomation.comhttps://literature.rockwellautomation.com/idc/groups/literature/documents/um/22b-um001_-en-e.pdf