Failure in Down-leveling Switch

What does 28 mean?

This error occurs when the down-leveling switch fails to operate, or if the switch's activation or deactivation falls outside the specified maximum effective or ineffective protection distances. These distances are calculated based on leveling vane length and floor distances.

• Malfunction, damage, or misalignment of the down-leveling switch itself.
• Incorrect positioning of the down-leveling switch relative to the leveling vane, leading to late or no activation.
• Issues with the leveling vane's length or position, or incorrect parameters for max effective/ineffective distance calculations.
• Wiring faults or poor connections in the down-leveling switch circuit.

Click steps to track your progress.

1. 1

   Inspect the physical condition and mounting of the down-leveling switch, ensuring it is clean, undamaged, and correctly aligned with the leveling vane.

2. 2

   Verify the electrical connections and functionality of the down-leveling switch by manually activating it and observing its state.

3. 3

   Measure the length of the leveling vane and confirm its value against relevant system parameters.

4. 4

   Check the settings for the maximum number of floors and the greatest distance between floors, as these influence protection distance calculations.