SOFAR (Shenzhen SOFARSOLAR) · PV inverters · SOFAR 3.3–12KTLX-G3 (three-phase grid inverter)
ID04The power grid frequency is too low
Name in the manufacturer's documentation (fault list): The power grid frequency is too low
[1]
In plain words (editorial)
The grid frequency is too low for the inverter, so it stops feeding in until the grid is back within range.
When to call a service technician: If the grid is within range, the AC wiring is correct and the alarm keeps repeating, contact technical support.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Steps given by the manufacturer (source text)
- If the grid voltage/frequency is within the acceptable range and AC wiring is correct, while the alarm occurs repeatedly, contact technical support to change the grid over-voltage, under-voltage, over frequency, under-frequency protection points after obtaining approval from the local electrical grid operator[2]
⚠ 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] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 69 official manufacturer document quote verified
The power grid frequency is too low
- [2] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 69 official manufacturer document quote verified
If the grid voltage/frequency is within the acceptable range and AC wiring is correct, while the alarm occurs repeatedly, contact technical support to change the grid over-voltage, under-voltage, over frequency, under-fr…