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

Alarm 2031Phase wire short-circuited to PE

Name in the manufacturer's documentation (fault list): Phase wire short-circuited to PE[1]

In plain words (editorial)

A phase wire on the AC side is short-circuited to protective earth (PE), or its impedance to PE is low. The inverter shuts down.

When to call a service technician: Have an electrician locate and fix the low-impedance point. Contact your installer or Huawei technical support.

✎ 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. 38 official manufacturer document quote verified 2031 Phase wire short-circuited to PE
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 38 official manufacturer document quote verified the phase wire is short-circuited to pe or its impedance to pe is low.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 38 official manufacturer document quote verified check the impedance of the phase wire to pe, locate the position with low impedance, and rectify the fault.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 38 official manufacturer document quote verified the device is shut down.