Overvoltage

What does -OSF mean?

This fault indicates that the DC bus voltage within the drive controller has exceeded a safe threshold during steady-state operation or acceleration. The primary cause is typically an input line voltage that is consistently higher than the drive controller's nominal rating, which can stress and damage internal power components like the DC bus capacitors and IGBTs.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Reset the drive controller after verifying the line voltage is within acceptable limits to clear the fault.