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

STATE 607RCMU error

Name in the manufacturer's documentation (service manual): RCMU error[1]

In plain words (editorial)

The residual current monitoring unit (RCMU) reports an error. The inverter is not feeding any energy into the grid. The manual says to reset the code by pressing “Enter”; the inverter then resumes feeding energy into the grid.

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. 50 manufacturer document – copy from a distributor quote verified 607 RCMU error
  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. 6 official manufacturer document quote verified Reset status code by pressing 'Enter'. The inverter resumes the feeding of energy into the grid; if the status code keeps appearing, check the complete photovoltaic system for damage
  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. 6 official manufacturer document quote verified Fault is rectified automatically. If this status code keeps recurring, contact your system engineer
  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. 6 official manufacturer document quote verified The inverter is not feeding any energy into the grid.