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Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)

Alarm 2042L/N Reverse Phase Sequence

Name in the manufacturer's documentation (fault list): L/N Reverse Phase Sequence[1]

In plain words (editorial)

L and N are swapped on the AC side (L/N reverse phase sequence).

When to call a service technician: Have an electrician check the AC cable connection.

✎ 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] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 49 official manufacturer document quote verified 2042 L/N Reverse Phase Sequence
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 49 official manufacturer document quote verified the l/n phase sequence on the ac side is reversed.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 48 official manufacturer document quote verified check whether the ac cable connection is normal.