Partner Academy · EcoBSS / FLEX
Fault
3P HV
F7
DC/DC_Softstart_Fault
DC/DC soft-start fault
EcoBSS service: DC/DC soft-start / BUS cannot build.
Register map
- Family
- Three-phase HV
- Register
- 555
- Bit
- 6
Field checks
- BUS voltage cannot be established from PV or from energy storage.
- Restart the inverter; if the fault remains, contact Inversol.
FAQ
What does EcoBSS F7 mean?
DC/DC soft-start fault
What should I check for EcoBSS F7?
- BUS voltage cannot be established from PV or from energy storage.
- Restart the inverter; if the fault remains, contact Inversol.
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).