733 No USB stick inserted - No USB device detected.

What does 733 mean?

A warning message appears on the display indicating that no USB stick is detected in the inverter's USB port, even if one is expected or needed for an operation.

• USB stick not inserted or not properly seated.
• Faulty USB stick.
• A problem with the inverter's USB port.

Click steps to track your progress.

1. 1

   Ensure a USB stick is correctly and fully inserted into the USB port.

2. 2

   Check the USB stick for any physical damage.

3. 3

   Try a different, known-good USB stick. If the code persists, contact a Fronius-trained service technician.