438 Function incompatibility - Incompatible PC boards in the inverter.

What does 438 mean?

Similar to 436, this indicates that one or more PC boards in the inverter are not compatible. The inverter will attempt to reconnect and resume grid power feed.

• Incompatible internal hardware components.
• Incorrect PC board replacement.
• Outdated firmware after a hardware change.

Click steps to track your progress.

1. 1

   Perform an AC reset by switching the automatic circuit breaker for the inverter off and then on again.

2. 2

   Update the inverter firmware to ensure all components have the latest compatible software.

3. 3

   If this status code persists, contact a Fronius-trained service technician.