DC input voltage MPPT 1 too high

What does 309 mean?

This code indicates that the DC input voltage from the PV string connected to Maximum Power Point Tracker 1 (MPPT 1) is too high. This triggers a short-term interruption in energy feeding, and the inverter will attempt to resume its startup routine.

• PV string connected to MPPT1 has an open-circuit voltage (Voc) that exceeds the inverter's maximum input voltage.
• Faulty PV modules in the string leading to excessive voltage.
• Incorrect string configuration or number of modules for MPPT1.

Click steps to track your progress.

1. 1

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

2. 2

   Verify the open-circuit voltage (Voc) of the PV string connected to MPPT1 and ensure it is within the inverter's specified limits.

3. 3

   Reconfigure or modify the PV string connected to MPPT1 if its voltage exceeds the inverter's rating.