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

STATE 438Functional incompatibility (PC boards not compatible, e.g. after replacement)

Name in the manufacturer's documentation (service manual): Functional incompatibility (PC boards not compatible, e.g. after replacement)[1]

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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. 47 manufacturer document – copy from a distributor quote verified 438 Functional incompatibility
  2. [2] Fronius Symo / Fronius Eco – Operating Instructions (e-Manual HTML), Version 044-17072025 – chapter “Status diagnostics and troubleshooting” (text capture) (e-Manual 4204101909, 044-17072025) , p. 4 official manufacturer document quote verified Update inverter firmware
  3. [3] Fronius Symo / Fronius Eco – Operating Instructions (e-Manual HTML), Version 044-17072025 – chapter “Status diagnostics and troubleshooting” (text capture) (e-Manual 4204101909, 044-17072025) , p. 4 official manufacturer document quote verified If the status code is displayed all the time: notify a Fronius-trained service technician
  4. [4] Fronius Symo / Fronius Eco – Operating Instructions (e-Manual HTML), Version 044-17072025 – chapter “Status diagnostics and troubleshooting” (text capture) (e-Manual 4204101909, 044-17072025) , p. 4 official manufacturer document quote verified The inverter will automatically attempt to connect again and, if possible, will resume feeding energy into the grid