608

Functional incompatibility (PC boards)

Fronius · Solar Energy

What does 608 mean?

One or more PC boards in the inverter are not compatible with each other, for example, after a PC board has been replaced. This prevents the inverter from feeding any energy into the grid.

Common Causes

  • Incompatible PC boards installed in the inverter
  • Incorrect PC board replacement

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Update the inverter firmware to ensure compatibility across installed PC boards

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

Related Faults

558Functional incompatibility (PC boards)481Functional incompatibility (PC boards)486CAN transmit buffer is full
Source: Fronius Solar Energy
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