Radiation Fin Overheated

What does %h mean?

This fault indicates that the inverter's radiation fin temperature has exceeded its operational limit. In a warning state (when stopped), it signifies overheating during idle conditions. If the protective mechanism is actuated, it means the overheating is severe enough to shut down the inverter during operation. This is often caused by high ambient temperatures or insufficient cooling, which can lead to reduced lifespan or damage to the inverter.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If necessary, install a cooling fan or air conditioner to improve ventilation and lower the ambient temperature in the enclosure.