Growatt · PV inverters · Growatt MOD TL3-X (three-phase grid inverter, 3–15 kW)
Error 408NTC Temperature too high
Name in the manufacturer's documentation (user manual): NTC Temperature too high
[1]
In plain words (editorial)
The internal (NTC) temperature is too high. The manual says to check the temperature after shutdown and restart the inverter normally.
When to call a service technician: 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. 27 official manufacturer document quote verified
Error 408 NTC Temperature too high
- [2] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 27 official manufacturer document quote verified
After shutdown,Check the temperature, normal restart the inverter
- [3] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 27 official manufacturer document quote verified
If the error message still exists, contact manufacturer