Heatsink Overheat

What does OH mean?

The temperature of the Drive's heatsink has exceeded the programmed setpoint (L8-02, L8-03=0 to 2), indicating inadequate cooling or excessive ambient temperature. This can be caused by a nearby heat source, dirt buildup on fans/heatsink, or high room temperature. Persistent overheating will lead to nuisance trips, reduced performance, and can significantly shorten the Drive's lifespan.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure there is adequate ventilation around the Drive, and that no external heat sources are impinging on its cooling surfaces.

2. 4

   Verify the settings for heatsink overheat detection (L8-02 and L8-03) are appropriate for the application and operating environment.