Solar · Error codes
What do Fronius state codes 102, 103 and 107 mean?
Short answer
Fronius class 1 codes come from the public grid, not the inverter: 102 means AC voltage too high, 103 too low, 105 and 106 frequency out of range, and 107 no AC grid. The inverter disconnects and resumes automatically. For 107, check the inverter's breaker is on and there's no power cut; if codes recur, tell your installer.
Last checked 24 September 2026 · 1 source
In more detail
- GPIS SoftStart ramps output back up after an AC error.
- AC voltage must be 230 V +10%/-5% (country setup dependent).
The facts, dated
- 01Fronius class 1 status codes generally arise momentarily and are caused by the public grid — 1xx class
manufacturer · n/a · checked 24 September 2026 · manuals.fronius.com
Sources
- manuals.fronius.com — manuals.fronius.com/html/4204102165/en.html
Last checked: 24 September 2026