Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)
Alarm 2041Reverse Phase Sequence on AC Side
Name in the manufacturer's documentation (fault list): Reverse Phase Sequence on AC Side
[1]
In plain words (editorial)
The phase sequence on the AC side is reversed; the inverter shuts down.
When to call a service technician: Have an electrician check the AC cable connection.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Possible causes (source text)
- The phase sequence on the ac side is reversed.[2]
Steps given by the manufacturer (source text)
- Check whether the ac cable connection is normal.[3]
What the device does (source text)
- The device is shut down.[4]
⚠ 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. 48 official manufacturer document quote verified
2041 Reverse Phase Sequence on AC Side
- [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 48 official manufacturer document quote verified
the phase sequence on the ac side is reversed.
- [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 48 official manufacturer document quote verified
check whether the ac cable connection is normal.
- [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 47 official manufacturer document quote verified
the device is shut down.