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
If this status code keeps recurring, contact your system engineer for diagnosis.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Symo Advanced Manual