AC Drive Heatsink Overtemperature Alarm

What does 131 mean?

The temperature of the power unit's heatsink has reached an elevated level, triggering an alarm, indicating it is approaching the fault limit. This could be due to inadequate cooling, dusty heatsink, high ambient temperature, excessive switching frequency, or a failing cooling fan. While not yet a fault, sustained high temperatures will reduce component lifespan and may lead to a fault trip.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the cooling fan for proper operation and any obstructions.

2. 4

   Review the drive's parameter settings, especially the switching frequency, to ensure it is appropriate for the current ambient temperature and motor load.