Fronius Symo Hybrid Inverter Code 558, 559 — Functional incompatibility (PC boards)

What does 558, 559 mean?

A warning message on the display indicates that one or more PC boards within the inverter are not compatible with each other, for example, after a replacement. This can affect the inverter's functionality.

• Incorrect PC board replacement
• Software version mismatch between boards
• Hardware incompatibility

Click steps to track your progress.

1. 1

   Update the inverter firmware to the latest version.

2. 2

   If the warning persists after a firmware update, power cycle the inverter (AC and DC disconnect for 5 min, then reconnect).

3. 3

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