Too Many Starts (Cool-Down Active)

What does tbS mean?

This message is displayed after an 'SnbF' (Too many starts) trip when a technician attempts to reset the soft starter before its internal cool-down timer has fully expired. It indicates a mandatory waiting period to allow the soft starter components to cool.

• Attempt to reset the soft starter too soon after an 'SnbF' trip without allowing the internal cool-down timer to expire completely.
• Misunderstanding or disregard of the soft starter's thermal protection logic (e.g., 'SLG' parameter, 'Snb' parameter implications).
• Operator impatience or insufficient training on thermal management and reset procedures for the soft starter.
• High ambient temperature around the soft starter enclosure, extending the required cool-down period.

Click steps to track your progress.

1. 1

   1. Wait for the soft starter's internal cool-down timer to expire automatically before attempting a reset (observe display for timer status).

2. 2

   2. Consult the soft starter manual for the specific cool-down time calculation and the influence of 'SLG' and 'Snb' parameters.

3. 3

   3. Monitor the soft starter's internal temperature (if available via HMI or communication) to understand its thermal state.

4. 4

   4. Improve ventilation around the soft starter enclosure to aid in faster heat dissipation and reduce cool-down periods.

5. 5

   5. Train operators on the importance of respecting thermal protection delays to prevent damage to the equipment.