Flying start Immediate disconnection

What does 88 mean?

Observed exclusively in VFC n-CTRL operating mode. This fault indicates that the inverter was enabled while the actual motor speed exceeded 5000 1/min. The inverter's flying start function has a speed limit for engagement, and exceeding this limit prevents proper control. The inverter immediately disconnects to prevent unstable operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check for any external factors or residual kinetic energy that might keep the motor speed above the limit when an enable signal is issued.