308

Intermediate circuit voltage too high

Fronius · Symo Advanced Manual

What does 308 mean?

The DC link voltage (intermediate circuit) within the inverter has risen above its maximum permissible operating limit. This causes a short-term interruption in energy feeding, and the inverter will then attempt to resume its start-up routine.

Common Causes

  • Overvoltage condition on the DC input from the solar modules
  • Internal inverter control or regulation malfunction

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    If this status code keeps recurring, contact your system engineer for diagnosis.

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

Related Faults

Source: Fronius Symo Advanced Manual