Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)
Alarm 4023AC Cable Connection Abnormal
Name in the manufacturer's documentation (fault list): AC Cable Connection Abnormal
[1]
This page only quotes the original English documentation. A plain-language explanation has not been written yet, so the page is not indexed by search engines.
For technicians
Possible causes (source text)
Steps given by the manufacturer (source text)
- Check whether the uow cables between the grid-tied port, self-supporting port, and power distribution panel are incorrectly connected.[4]
- Check whether the cable between the grid-tied port and the independent port is incorrectly connected.[5]
- Power on the device again and check whether the alarm is generated. if the fault persists, contact your dealer/customer service.[6]
⚠ 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. 121 official manufacturer document quote verified
4023 AC Cable Connection Abnormal
- [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 121 official manufacturer document quote verified
the uow cable to the grid connection port or self- consumption port is connected incorrectly.
- [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 121 official manufacturer document quote verified
the cable between the grid connection port and self- consumption port is connected incorrectly.
- [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 121 official manufacturer document quote verified
check whether the uow cables between the grid-tied port, self-supporting port, and power distribution panel are incorrectly connected.
- [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 121 official manufacturer document quote verified
check whether the cable between the grid-tied port and the independent port is incorrectly connected.
- [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 121 official manufacturer document quote verified
power on the device again and check whether the alarm is generated. if the fault persists, contact your dealer/customer service.