49

Speed limit

Danfoss · VLT HVAC-FC 102 Frequency Converter

What does 49 mean?

The motor speed is not within the specified range set in parameters 4-11 (Motor Speed Low Limit) and 4-13 (Motor Speed High Limit), generating a warning. If the speed drops below the limit set in 1-86 (Trip Speed Low) (except during start/stop), the frequency converter will trip. This indicates an operational deviation that could affect process control or product quality.

Source: Danfoss VLT HVAC-FC 102 Frequency Converter
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