Current Unbalance

What does UnbC mean?

The internal current sensor has detected an unbalanced current flow on the motor phases. This could indicate issues with motor wiring, damaged internal power transistors (IGBTs) within the drive, or short-circuits/grounding problems on the connected motor, leading to inefficient operation or potential drive damage.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Perform insulation resistance tests on the connected motor to check for short circuits or grounding problems within the motor windings.