You are in current limit.  From the List Manual

A07409 (N) Drive: U/f control, current limiting controller active

Message class: Application/technological function faulted (17)

Reaction: NONE

Acknowledge: NONE

Cause: The current limiting controller of the U/f control was activated because the current limit was exceeded.

Remedy: The alarm is automatically withdrawn after one of the following measures:

- increase current limit (p0640).

- reduce the load.

- slow down the ramp up to the setpoint speed.