Partner Academy · EcoBSS / FLEX
Fault
3P LV
F20
Tz_Dc_OverCurr_Fault
DC hardware overcurrent fault
EcoBSS service: DC overcurrent (hardware).
Register map
- Family
- Three-phase LV (FLEX 3L)
- Register
- 556
- Bit
- 3
Field checks
- Check PV module and energy-storage connections.
- In off-grid mode, starting into a large load can trigger F20 — reduce the load.
- Turn off DC and AC switches, wait one minute, then turn them on again.
- Contact Inversol if the fault does not clear.
FAQ
What does EcoBSS F20 mean?
DC hardware overcurrent fault
What should I check for EcoBSS F20?
- Check PV module and energy-storage connections.
- In off-grid mode, starting into a large load can trigger F20 — reduce the load.
- Turn off DC and AC switches, wait one minute, then turn them on again.
- Contact Inversol if the fault does not clear.
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).