Mechanical brake opening failed

What does 71A3 mean?

A mechanical brake control fault occurred during brake opening in the ACS880 drive. This is typically activated if the brake acknowledgement signal is not as expected, indicating the brake did not open properly.

• Mechanical binding or obstruction preventing the brake from opening fully.
• Incorrect wiring or a faulty sensor for the brake acknowledgement signal, providing incorrect feedback.
• Misconfigured parameters in group 44 Mechanical brake control (e.g., brake opening delay, acknowledgement signal source, 44.17 Brake fault function).
• Contamination or corrosion affecting the brake's mechanical operation.

Click steps to track your progress.

1. 1

   Inspect the mechanical brake assembly for any physical obstructions, excessive wear, or damage that prevents proper opening.

2. 2

   Verify the wiring and functionality of the brake acknowledgement switch or sensor.

3. 3

   Check that the acknowledgement signal matches the actual brake status in the drive's I/O diagnostics.

4. 4

   Review parameter group 44 Mechanical brake control, specifically 44.17 Brake fault function and related settings for opening sequence and delays.

5. 5

   Ensure the brake coil is receiving the correct voltage and current for proper disengagement and that the brake releases freely.