Skip to content
EN

Fronius · PV inverters · Fronius Symo 3.0–20.0 (three-phase grid inverter, SnapINverter)

STATE 102AC voltage too high

Name in the manufacturer's documentation (service manual): AC voltage too high[1]

In plain words (editorial)

The grid voltage is too high for the inverter, so it disconnects from the grid and monitors it; it resumes feeding energy once the grid is back within the permissible range. The manual says to check the grid connections.

When to call a service technician: If the code keeps recurring, contact your system installer.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Fronius Symo 3.0-3 – 20.0-3, Fronius Eco 25.0-3 – 27.0-3 – Operating Instructions (42,0410,2028, ed. 016-24082016) – distributor copy (42,0410,2028 (016-24082016)) , p. 45 manufacturer document – copy from a distributor quote verified 102 AC voltage too high
  2. [2] Fronius Symo 3.0-3 – 20.0-3, Fronius Eco 25.0-3 – 27.0-3 – Operating Instructions (42,0410,2028, ed. 016-24082016) – distributor copy (42,0410,2028 (016-24082016)) , p. 45 manufacturer document – copy from a distributor quote verified Check grid connections;
  3. [3] Fronius Symo 3.0-3 – 20.0-3, Fronius Eco 25.0-3 – 27.0-3 – Operating Instructions (42,0410,2028, ed. 016-24082016) – distributor copy (42,0410,2028 (016-24082016)) , p. 45 manufacturer document – copy from a distributor quote verified if this status code keeps recur
  4. [4] Fronius Symo 3.0-3 – 20.0-3, Fronius Eco 25.0-3 – 27.0-3 – Operating Instructions (42,0410,2028, ed. 016-24082016) – distributor copy (42,0410,2028 (016-24082016)) , p. 45 manufacturer document – copy from a distributor quote verified The initial response of the inverter is to disconnect itself from the grid
  5. [5] Fronius Symo 3.0-3 – 20.0-3, Fronius Eco 25.0-3 – 27.0-3 – Operating Instructions (42,0410,2028, ed. 016-24082016) – distributor copy (42,0410,2028 (016-24082016)) , p. 45 manufacturer document – copy from a distributor quote verified Following careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid