Skip to content
EN

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

Alarm 2004DC Overvoltage

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

In plain words (editorial)

The inverter's internal DC bus voltage exceeded the upper threshold and the inverter shut down. The manual's procedure: turn off the AC and DC switches and check the input voltage.

When to call a service technician: If the input voltage is above the limit, or the alarm persists, 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. 18 official manufacturer document quote verified 2004 DC Overvoltage
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 18 official manufacturer document quote verified the dc bus voltage of the device exceeds the upper threshold.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 18 official manufacturer document quote verified turn off the ac and dc switches, and check the input voltage. if the input voltage exceeds the upper limit, contact your vendor or technical support. if the voltage is within the normal range, turn on the ac and dc switc…
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 18 official manufacturer document quote verified the device is shut down.