Cause : Regenerative power limit exceeded (F3E) comes when blocksize power units, types PM250 and PM260, the regenerative rated power r0206[2] was exceeded for more than 10 s.

- increase the down ramp.
- reduce the driving load.
- use a power unit with a higher regenerative feedback capability.
- for vector control, the regenerative power limit in p1531 can be reduced so that the fault is no longer triggered.