106
AC frequency too low
Fronius · Solar Energy
What does 106 mean?
The AC grid frequency is detected as too low. The inverter temporarily disconnects from the grid according to safety standards and will resume operation once the frequency returns to the permissible range.
Common Causes
- Insufficient AC frequency from the public grid
- Poor grid connection quality
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check all AC grid connections at the inverter and point of common coupling
Verified technical data. Last updated: March 2026
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Source: Fronius Solar Energy