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

Alarm 2038Grid Frequency Unstable

Name in the manufacturer's documentation (fault list): Grid Frequency Unstable[1]

In plain words (editorial)

The grid frequency changes faster than the local grid standard allows; the inverter shuts down. If it happens only occasionally, the grid was temporarily abnormal and the inverter recovers automatically once the grid is normal again.

When to call a service technician: If it happens frequently, contact your installer – the grid values may need to be checked with the local power operator; protection thresholds may only be changed with the operator's consent.

✎ 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. 45 official manufacturer document quote verified 2038 Grid Frequency Unstable
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 45 official manufacturer document quote verified power grid exception: the actual grid frequency change rate does not comply with the local power grid standard.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 44 official manufacturer document quote verified if the alarm occurs occasionally, the power grid may be abnormal temporarily. the device automatically recovers after detecting that the power grid becomes normal.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 44 official manufacturer document quote verified if the alarm occurs frequently, check whether the power grid frequency is within the allowed range. if not, contact the local power operator.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 44 official manufacturer document quote verified the device is shut down.