Mechanical brake opening failed

What does 71A3 mean?

A mechanical brake control fault has occurred because the brake acknowledgment signal was not as expected during the brake opening sequence. This implies either the brake did not open, its feedback mechanism failed, or it is stuck, potentially preventing motor rotation or causing excessive load.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify that the physical acknowledgment signal from the brake accurately reflects its open status (e.g., limit switch operation).

2. 4

   Check the brake mechanism for mechanical obstruction, wear, or damage that prevents full opening.