Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced)

What does 436 mean?

Internal PC boards within the inverter are found to be incompatible, typically after a component replacement. This prevents proper inverter operation, but the inverter attempts to reconnect after detection.

• Installation of an incorrect or incompatible replacement PC board
• Firmware version mismatch between different PC boards

Click steps to track your progress.

1. 1

   Update inverter firmware to the latest version.

2. 2

   If this status code is displayed all the time, notify a Fronius-trained service engineer.