Growatt · PV inverters · Growatt MOD TL3-X (three-phase grid inverter, 3–15 kW)
Warning 304CT Open or Wrong
Name in the manufacturer's documentation (user manual): CT Open or Wrong
[1]
In plain words (editorial)
The CT (AC current sensor) is open or wrong – the manual says to check that it is connected well.
When to call a service technician: Have your installer check the CT; if the message still exists, contact your installer or Growatt.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
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] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 26 official manufacturer document quote verified
Warning 304 CT Open or Wrong
- [2] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 26 official manufacturer document quote verified
Check if AC current sensor is connected well
- [3] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 26 official manufacturer document quote verified
I f e r r o r m e s s a g e s t i l l e x i s t s , c o n t a c t manufacturer