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

F42Parallel_Version_Fault

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

In plain words (editorial)

The fault list names F42 “Parallel_Version_Fault”, while the user manual treats it as a grid voltage fault and asks you to check that the AC voltage is within the specified range and that the grid cables are connected firmly. The two Deye documents disagree, so check both causes.

When to call a service technician: Voltage measurements and AC wiring checks are for the installer.

✎ 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. 4 manufacturer document – copy from a distributor quote verified F42 Parallel_Version_Fault
  2. [2] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (V3.3.0, ed. 2026-03-19) (30240301003423 V3.3.0) , p. 49 official manufacturer document quote verified Check the AC voltage is in the range of standard voltage inspecification
  3. [3] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (V3.3.0, ed. 2026-03-19) (30240301003423 V3.3.0) , p. 49 official manufacturer document quote verified Check whether grid AC cables are firmly and correctly connected
  4. [4] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (V3.3.0, ed. 2026-03-19) (30240301003423 V3.3.0) , p. 49 official manufacturer document quote verified Seek help from us, if can not go back to normal state
  5. [5] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (V3.3.0, ed. 2026-03-19) (30240301003423 V3.3.0) , p. 49 official manufacturer document quote verified Grid voltage fault