Overtemperature
Vacon · NX Liquid-Cooled Drive
What does 14 mean?
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.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Inspect the cooling fan condition, ensuring it is rotating freely and providing adequate airflow.
- 4
Check the power module loading to ensure it is not exceeding its continuous rating.
- 5
Check the signal wiring from all temperature sensors to the control unit.
- 6
Verify that parameter Ith (found in Chapter 4.2) for the drive is not exceeded in relation to motor load and switching frequency.