Heatsink OverTemperature

What does F8 mean?

This fault is triggered when the temperature of the drive's heatsink exceeds its safe operating limit. Overheating can be caused by restricted airflow, accumulation of dust and debris on the heatsink fins, a malfunctioning cooling fan, or an ambient temperature that is too high for the drive's specified enclosure rating. Prolonged operation at elevated temperatures will severely reduce the lifespan of the drive's power components.

• Blocked ventilation openings or restricted airflow around the drive due to dust, debris, or improper cabinet spacing.
• Failure of the cooling fan(s) on the drive's heatsink or control board.
• Ambient temperature inside the control cabinet exceeding the drive's specified maximum operating temperature (e.g., >50°C).
• Drive operating continuously near or above its rated output current (A) for extended periods.
• Installation in a control cabinet with insufficient overall ventilation or an inadequate cooling system.

Click steps to track your progress.

1. 1

   Inspect the drive's heatsink and cooling fan(s) for dust accumulation, blockages, or signs of fan failure.

2. 2

   Clean the heatsink fins and fan blades thoroughly using compressed air (after disconnecting power).

3. 3

   Measure the ambient air temperature inside the control cabinet where the drive is installed.

4. 4

   Verify that the cooling fan(s) are operating correctly by visual inspection or by measuring their voltage supply (e.g., 24VDC).

5. 5

   Ensure adequate clearance around the drive for proper airflow as specified in the drive's installation manual.

6. 6

   Reduce the motor load or operating frequency to decrease the drive's output current and thus its internal heat generation.