Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)
Alarm 2070Active islanding
Name in the manufacturer's documentation (fault list): Active islanding
[1]
In plain words (editorial)
Islanding detected (actively) – the grid has an AC power outage. The manual says to check that the voltage at the inverter's grid connection point is normal.
When to call a service technician: If the grid is up and the alarm stays, contact your installer.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Possible causes (source text)
- When the power grid experiences an ac power outage, the device detects islanding proactively.[2]
Steps given by the manufacturer (source text)
- Check that the voltage at the grid connection point of the device is normal.[3]
⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.
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] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 64 official manufacturer document quote verified
2070 Active islanding
- [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 64 official manufacturer document quote verified
when the power grid experiences an ac power outage, the device detects islanding proactively.
- [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 64 official manufacturer document quote verified
check that the voltage at the grid connection point of the device is normal.