AC module overtemperature

What does 304 mean?

This code indicates that the AC module within the inverter has reached an excessively high temperature. This causes a short-term interruption in energy feeding, after which the inverter will resume its startup routine once temperatures normalize.

• Restricted airflow to the inverter's cooling system due to blocked vents or dirty heat sinks.
• High ambient temperatures, or direct sunlight exposure on the inverter enclosure.
• Failure of internal cooling fans on the AC side.

Click steps to track your progress.

1. 1

   Clean and purge all cooling air openings and the heat sink of the inverter.

2. 2

   Verify that the inverter is installed in a location with adequate ventilation and is not subjected to excessive ambient temperatures.

3. 3

   Inspect internal cooling fans responsible for AC module cooling.