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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 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.

  2. 4

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

Source: Danfoss VLT HVAC Drive High Power
View Official PDF