Power unit: Phase failure motor cable

What does F30015 mean?

This fault indicates a phase failure in the motor feeder cable. It can also occur if the motor stalls in U/f control, leading to zero current in one phase due to current asymmetry, or if closed-speed control is unstable, generating oscillating torque. Note that chassis power units do not monitor this condition. If left unresolved, this can lead to motor damage, drive instability, and unexpected shutdowns.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Review and optimize the speed controller settings to ensure stable operation and prevent oscillating torque.