12

Brake chopper supervision

Vacon · NX All-in-One Application

What does 12 mean?

This fault indicates an issue with the dynamic braking circuit. Possible causes include the absence of a brake resistor, a physical break in the brake resistor element, or a malfunction within the brake chopper itself. This condition prevents the drive from effectively dissipating regenerative energy generated by the motor during deceleration.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Inspect the cabling between the drive's brake terminals and the brake resistor for continuity, secure connections, and any signs of damage.

Source: Vacon NX All-in-One Application
Open Manual (Page 373)