Overtemperature

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The power module heatsink temperature has exceeded 60°C (fault) or 55°C (warning). The circuit board temperature might also be over 85ºC (warning at 75ºC). Causes include insufficient coolant flow, high ambient temperature, cooling fan failure, excessive power module loading, or issues with the drive's thermal model parameters. Subcodes S1 (Overtemperature warning in unit, board or phases), S2 (Overtemperature in power board), S3 (Liquid flow), and S4 (Overtemperature on ASIC board or driver boards) provide further diagnostic insight.

• Heatsink temperature exceeds operational limits (P0311).
• Overload condition causing excessive internal heat.
• Cooling fan failure or obstruction.

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1. 1

   Check the coolant flow rate and temperature for liquid-cooled units to ensure efficient heat removal.

2. 2

   Verify the ambient temperature around the drive and ensure it is within specified operating limits.

3. 3

   Inspect the cooling fan condition, ensuring it is rotating freely and providing adequate airflow.

4. 4

   Check the power module loading to ensure it is not exceeding its continuous rating.

5. 5

   Check the signal wiring from all temperature sensors to the control unit.

6. 6

   Verify that parameter Ith (found in Chapter 4.2) for the drive is not exceeded in relation to motor load and switching frequency.