Current Balancing Error

What does PF Curr Err mean?

This fault indicates an imbalance in current, either between different power modules (if parallel units) or between two phases within a single module. This can be caused by motor issues, supply problems, or internal drive component variations. Persistent current imbalance can stress power components, leading to reduced lifespan, overheating, or catastrophic failure of the VSD and motor.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Measure the individual motor current leads with a clamp-on amp meter to verify current balancing between phases and modules.