Partner Academy · EcoBSS / FLEX
Fault
3P LV
F57
AC_BackFeed_Fault
AC back-feed fault
Academy field checklist (AC_BackFeed_Fault) — no EcoBSS service-table row for this bit.
Register map
- Family
- Three-phase LV (FLEX 3L)
- Register
- 558
- Bit
- 8
Field checks
- AC back-feed detected — check export settings, meter/CT direction, and that Grid/Load wiring matches the port map.
- Do not defeat anti-islanding / back-feed protection.
- Contact Inversol if the fault returns after a clean power cycle.
FAQ
What does EcoBSS F57 mean?
AC back-feed fault
What should I check for EcoBSS F57?
- AC back-feed detected — check export settings, meter/CT direction, and that Grid/Load wiring matches the port map.
- Do not defeat anti-islanding / back-feed protection.
- Contact Inversol if the fault returns after a clean power cycle.
When should I contact Inversol?
Confirm LV vs HV family on the nameplate, complete the field checks, then contact Inversol with model, SN, family, and a photo if the code returns after a clean power cycle.
Partner lookup from EcoBSS Flex register map V1.2 — not a substitute for the official service manual or live measurements. Always match the inverter family (3P LV / FLEX 3L vs 3P HV).