BC short circuit

What does 7191 mean?

A short circuit has occurred within the brake chopper's IGBT, indicating a component failure that disables the regenerative braking function. This prevents the dissipation of excess energy, potentially leading to DC bus overvoltage and further drive damage if not addressed.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If the brake chopper is a replaceable unit, proceed with its replacement as per the manufacturer's instructions.