OH Heatsink temperature > +90°C

What does 0050 mean?

The heatsink temperature has exceeded +90°C (or >85°C as an earlier warning threshold, C0061). This can be caused by ambient temperatures (Tu) above +40°C or +50°C, a dirty heatsink impeding airflow, or an incorrect mounting position preventing adequate ventilation.

• Ambient temperature (Tu) in the control cabinet exceeding the drive's specified maximum (e.g., >40°C or +50°C).
• Accumulation of dust, dirt, or debris on the drive's heatsink fins, blocking airflow and preventing effective heat dissipation.
• Malfunctioning or failed cooling fan on the drive, leading to inadequate forced convection across the heatsink.
• Insufficient ventilation or blocked air circulation within the control cabinet, causing hot air to be recirculated around the drive.
• Sustained high motor load operation, causing the drive's power semiconductor losses to increase and thus heatsink temperature.

Click steps to track your progress.

1. 1

   Verify the control cabinet ambient temperature (e.g., using a thermocouple) is within the drive's specified operating range.

2. 2

   Power down and lockout the drive, then thoroughly clean the heatsink fins with compressed air to remove dust and debris.

3. 3

   Check the operation of the drive's internal cooling fan(s) (e.g., visually inspect for rotation, listen for abnormal noise).

4. 4

   Inspect control cabinet filters and fans to ensure proper airflow and heat exchange, clean/replace filters if necessary.

5. 5

   Reduce the drive's output current (e.g., by reducing motor load or extending acceleration/deceleration times C0012, C0013) to lower internal power losses.

6. 6

   Verify parameter C0061 (heatsink overtemperature warning threshold) is set appropriately, not excessively low.