Overcurrent (DC)

What does 302 mean?

This code indicates an overcurrent condition on the DC input side of the inverter, typically from the PV strings. This causes a short-term interruption in energy feeding, after which the inverter will attempt to resume its startup routine.

• Excessive current from the PV modules due to fault conditions like short circuits in strings.
• Incorrectly sized or faulty PV strings leading to current exceeding inverter limits.
• Direct short circuit on the DC input terminals.

Click steps to track your progress.

1. 1

   If the status code is displayed continuously, notify a Fronius-trained service engineer for further diagnosis.

2. 2

   Measure DC current on each string to identify potential short circuits or overloads.

3. 3

   Inspect all DC cabling and connectors for damage or insulation breakdown that could cause a short.