GoodWe · PV inverters · GoodWe ET 5–10 kW (three-phase hybrid inverter)
VAC FailureVAC Failure
Name in the manufacturer's documentation (user manual): VAC Failure
[1]
In plain words (editorial)
The grid voltage is outside the normal range for the inverter. The manual lists checking the safety country setting, the AC voltage between L and N, the AC cable length and connection, and the stability of the local grid.
When to call a service technician: If it persists, contact your installer.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Steps given by the manufacturer (source text)
- Make sure safety country of the inverter is set right[2]
- Check (use multi-meter) if the AC voltage between L and N is within a normal range (also on AC breaker side)[3]
- If AC voltage is high, make sure the AC cable complies with the user manual and is not too long[4]
- If voltage is low, make sure the AC cable is connected well and the jacket is not compressed into the AC terminal[5]
- Make sure the grid voltage of your area is stable and within normal range[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] GoodWe Hybrid Inverter ET Series | ET Plus Series – User Manual V1.1 (2021-02-10) (V1.1-2021-02-10) , p. 35 official manufacturer document quote verified
VAC Failure
- [2] GoodWe Hybrid Inverter ET Series | ET Plus Series – User Manual V1.1 (2021-02-10) (V1.1-2021-02-10) , p. 35 official manufacturer document quote verified
Make sure safety country of the inverter is set right
- [3] GoodWe Hybrid Inverter ET Series | ET Plus Series – User Manual V1.1 (2021-02-10) (V1.1-2021-02-10) , p. 35 official manufacturer document quote verified
if the AC voltage (Between L & N) is within a normal range
- [4] GoodWe Hybrid Inverter ET Series | ET Plus Series – User Manual V1.1 (2021-02-10) (V1.1-2021-02-10) , p. 35 official manufacturer document quote verified
make sure the AC cable complies with that required on user manual and the AC cable is not too long
- [5] GoodWe Hybrid Inverter ET Series | ET Plus Series – User Manual V1.1 (2021-02-10) (V1.1-2021-02-10) , p. 35 official manufacturer document quote verified
the jacket of the AC cable is not compressed into the AC terminal
- [6] GoodWe Hybrid Inverter ET Series | ET Plus Series – User Manual V1.1 (2021-02-10) (V1.1-2021-02-10) , p. 35 official manufacturer document quote verified
Make sure the grid voltage of your area is stable and within normal range