Mechanical brake opening not allowed

What does 71A5 mean?

The conditions required for opening the mechanical brake cannot be met, often because the brake is being intentionally kept closed by a parameter setting (e.g., 44.11 Keep brake closed) or due to a safety interlock. This prevents motor operation and is usually a configuration or interlock issue.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check that the acknowledgment signal (if used) accurately reflects the actual status of the brake, and that there's no feedback error.

2. 4

   Verify all pre-conditions for brake opening as per system design.