Heatsink temperature low

What does 66 mean?

The frequency converter's heatsink temperature, measured by a sensor in the IGBT module, is too low for safe operation. This indicates the unit is too cold to operate efficiently or without condensation risk. Operation at extremely low temperatures can affect component reliability and performance.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Configure parameters 2-00 (DC Hold/Preheat Current) to a small percentage (e.g., 5%) and 1-80 (Function at Stop) to continuously supply a trickle current for preheating.