Internal Temperature Too High

What does PF Int Temp mean?

The internal temperature of the variable speed drive has exceeded its safe operating limit. This indicates insufficient cooling or excessive load, which prevents the drive from safely dissipating heat. Prolonged high temperatures will significantly reduce the lifespan of electronic components and can lead to immediate shutdown or permanent damage to the VSD's power stage.

• Blocked or dirty cooling fan, reducing airflow.
• Insufficient ventilation in the drive enclosure (e.g., blocked air filters, inadequate cabinet sizing).
• Ambient temperature exceeding drive's rated operating limits (e.g., > 40°C).
• Drive operating continuously at or above its rated current (overload condition).
• Internal temperature sensor miscalibration or fault (less common than actual overheating).

Click steps to track your progress.

1. 1

   Inspect and clean cooling fan and heatsink fins thoroughly using compressed air.

2. 2

   Verify enclosure ventilation filters are clean and airflow is not obstructed.

3. 3

   Measure ambient temperature inside the electrical enclosure; ensure it is within drive's specified limits (e.g., 0-40°C).

4. 4

   Monitor drive output current (e.g., P0-02) and motor load (e.g., P0-03) during operation to ensure it's not consistently overloaded.

5. 5

   Reduce switching frequency (e.g., parameter P6-01) if possible, as higher frequencies generate more heat.