Partner Academy · EcoBSS / FLEX
Fault
3P LV
F1
DC_InversedFailure
Reverse DC (PV) polarity fault
EcoBSS service: DC input reverse polarity.
Register map
- Family
- Three-phase LV (FLEX 3L)
- Register
- 555
- Bit
- 0
Field checks
- Check PV input polarity (and DC string polarity).
- Contact Inversol if the unit does not return to normal after correcting polarity.
FAQ
What does EcoBSS F1 mean?
Reverse DC (PV) polarity fault
What should I check for EcoBSS F1?
- Check PV input polarity (and DC string polarity).
- Contact Inversol if the unit does not return to normal after correcting polarity.
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).