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

Alarm 2002DC Arc Fault

Name in the manufacturer's documentation (fault list): DC Arc Fault[1]

In plain words (editorial)

The inverter detected an electric arc on the DC side – the manual names arcing or poor contact in the PV string cables. It lists burn marks, loose or badly crimped terminals and damaged cables as things to look for.

When to call a service technician: Do not touch the DC cabling yourself – have an installer inspect it. If the alarm persists after troubleshooting, the manual says to export the logs and contact 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. 16 official manufacturer document quote verified 2002 DC Arc Fault
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 16 official manufacturer document quote verified the pv string cables generate arcs or are in poor contact
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 16 official manufacturer document quote verified check the alarm information and identify the abnormal
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 16 official manufacturer document quote verified traces of ignition, poor contact of terminals, poor crimping of cables, and cable damage
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 16 official manufacturer document quote verified if the alarm persists after troubleshooting, manually clear the alarm
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 16 official manufacturer document quote verified if the alarm persists, export logs and contact technical support