743 Error occurred during the update - Software update process failed.

What does 743 mean?

A warning message indicates that an error occurred during the software update process. This means the update did not complete successfully.

• Corrupted update file.
• Faulty USB stick.
• Unexpected power interruption during update.
• Internal inverter error during update.

Click steps to track your progress.

1. 1

   Repeat the update process with the same USB stick and file.

2. 2

   If the error recurs, check the USB stick for functionality or try a different USB stick.

3. 3

   Ensure the update file is downloaded correctly and not corrupted. If the code persists, contact a Fronius-trained service technician.