102
AC voltage too high
Fronius · Symo Advanced Manual
What does 102 mean?
The inverter has detected that the AC voltage from the public grid is above permissible limits. As a safety measure, the inverter disconnects itself from the grid. It will resume feeding energy once grid conditions return to a safe range after a stipulated monitoring period.
Common Causes
- Public grid voltage instability or overvoltage condition
- Incorrect grid connection impedance causing localized voltage rise
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check all grid connections for proper termination and secure fit.
- 2
If this status code keeps recurring, contact your system engineer for further grid analysis.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Symo Advanced Manual