Frequency converter overtemperature

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The heatsink temperature of the power unit has exceeded safe operating limits, specifically over 90 °C (194 °F), or 77 °C (170.6 °F) for NX_6 and FR6 series. An alarm triggers when the temperature surpasses 85 °C (185 °F), or 72 °C (161.6 °F). This indicates inadequate cooling or excessive internal heat generation, which can lead to component damage.

• Internal temperature of the frequency converter exceeds its safe operating limit.
• Insufficient cooling of the converter (e.g., blocked fan, high ambient temperature).
• Overload condition causing excessive heat generation within the converter.
• Faulty temperature sensor within the converter.
• Overvoltage or undervoltage transients affecting internal components.

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1. 1

   Verify the operational status of all cooling fans within the drive and ensure unobstructed airflow through the heatsink cooling fins.

2. 2

   Visually inspect the heatsink for any accumulation of dust, lint, or debris, and thoroughly clean if necessary to improve thermal dissipation.

3. 3

   Measure the ambient air temperature directly surrounding the drive enclosure — ensure it remains within the drive's specified operating temperature range.

4. 4

   Review the drive's switching frequency parameter settings — consider reducing it if it is set too high in relation to the ambient temperature and motor load.