GoodWe · PV inverters · GoodWe ET G2 6–15 kW (three-phase hybrid inverter)
F109External STS Fault
Name in the manufacturer's documentation (user manual): External STS Fault
[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)
- Inverter andSTSconnecting cable is abnormal.[2]
Steps given by the manufacturer (source text)
- Check whether the inverter andSTSare connected with the harness in one-to-one sequential correspondence.[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] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 223 official manufacturer document quote verified
F109
- [2] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 223 official manufacturer document quote verified
Inverter andSTSconnecting cable is abnormal
- [3] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 223 official manufacturer document quote verified
Check whether the inverter andSTSare connected with the harness in one-to-one sequential correspondence