F041Type 2 fault (manual reset) · Power sectionUsually repairable
PowerFlex 525 F041: Phase UV Short
What F041 means
Too much current flowed between output phases U and V. F042 (U to W) and F043 (V to W) are the same fault on the other phase pairs.
Symptoms
Trips immediately on run.
Is it repairable?
Yes: output stages and motors are both repairable.
Common causes
- Short between phases in the motor cable or motor terminal box
- A shorted motor winding
- A failed output transistor
Safe checks
- 1With power off, disconnect the motor and measure phase-to-phase resistance of the motor and cable. If they test good and the fault stays with the motor removed, the drive has failed
Drives hold dangerous voltage after power-off. Checks should only be done by qualified personnel, with power isolated and the DC link discharged.
Reviewed by AutomIQ repair technicians. Code and name from the PowerFlex 520-Series Adjustable Frequency AC Drive User Manual.
Related PowerFlex 525 faults
- F004UnderVoltage
- F005OverVoltage
- F007Motor Overload
- F008Heatsink OvrTmp
- F012HW OverCurrent
- F013Ground Fault