Possible hardware fault

What does 428 mean?

This code indicates a possible internal hardware fault within the inverter. Such a fault can encompass various components and may prevent proper operation or energy feeding.

• General malfunction of an internal PC board or component.
• Degradation or failure of electronic components.
• Manufacturing defect or physical damage to internal circuitry.

Click steps to track your progress.

1. 1

   If the status code is displayed continuously, notify a Fronius-trained service engineer for thorough diagnosis and potential component replacement.

2. 2

   Perform an AC reset to rule out transient hardware glitches.

3. 3

   Inspect internal PC boards for any visible signs of damage or overheating.