Partner Academy · EcoBSS / FLEX
Fault
3P HV
F36
AC_GridPhaseSeque_Fault
AC grid phase sequence fault
Academy field checklist (AC_GridPhaseSeque_Fault) — no EcoBSS service-table row for this bit.
Register map
- Family
- Three-phase HV
- Register
- 557
- Bit
- 3
Field checks
- Correct phase rotation on GRID (swap two phases) — same field fix as W3.
- Re-check after correction before enabling export.
- Contact Inversol if the fault returns after a clean power cycle.
FAQ
What does EcoBSS F36 mean?
AC grid phase sequence fault
What should I check for EcoBSS F36?
- Correct phase rotation on GRID (swap two phases) — same field fix as W3.
- Re-check after correction before enabling export.
- 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).