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Deye · PV inverters · Deye SUN-SG04LP3-EU (three-phase hybrid inverter, 5–12 kW)

F24DC_Insulation_Fault

Name in the manufacturer's documentation (fault list): DC_Insulation_Fault[1]

In plain words (editorial)

The PV insulation resistance is too low. The manual names a loose or incorrect connection between the PV panels and the inverter, or the inverter's PE cable not connected to ground.

When to call a service technician: Have an installer check the PV connections and the PE cable. If it does not return to normal, contact your installer or Deye support.

✎ 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. [1] Deye Three Phase Hybrid Inverter SUN-5-12KWSG04LP3 Fault List , p. 3 manufacturer document – copy from a distributor quote verified F24 DC_Insulation_Fault
  2. [2] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 48 official manufacturer document quote verified PV isolation resistance is too low
  3. [3] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 48 official manufacturer document quote verified Check the connection of PV panels and inverter is firmly and
  4. [4] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 48 official manufacturer document quote verified Check whether the PE cable of inverter is connected
  5. [5] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 48 official manufacturer document quote verified Check the connection of PV panels and inverter is firmly and
  6. [6] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 48 official manufacturer document quote verified Check whether the PE cable of inverter is connected
  7. [7] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 48 official manufacturer document quote verified Seek help from us, if can not go back to normal state.