22

Hoist mechanical brake

Danfoss · VLT HVAC Drive High Power

What does 22 mean?

This warning/alarm signals a problem with the hoist mechanical brake control. It can be triggered if the required torque reference is not achieved before the timeout specified in parameter 2-27 Torque Ramp Up Time expires, or if the expected brake feedback is not received within the time limits set by parameter 2-23 Activate Brake Delay and parameter 2-25 Brake Release Time. This prevents proper control of the mechanical brake, which is critical for hoisting applications.

Complete Troubleshooting Guide

  1. 1

    Verify that the torque reference is being met and that parameter 2-27 (Torque Ramp Up Time) is appropriately set for the application's mechanical load.

  2. 2

    Check the mechanical brake's feedback mechanism and associated wiring for proper operation and connectivity to ensure signals are being received by the drive.

  3. 3

    Review parameter 2-23 (Activate Brake Delay) and parameter 2-25 (Brake Release Time) to ensure they provide adequate time for the brake to engage/disengage and for feedback to register.

  4. 4

    Inspect the mechanical brake physically for any signs of malfunction, wear, or incorrect adjustment that might prevent proper operation.