Partner Academy · EcoBSS / FLEX
Fault
3P HV
F18
HW_Ac_OverCurr_Fault
Hardware AC overcurrent fault
EcoBSS service: AC overcurrent (hardware).
Register map
- Family
- Three-phase HV
- Register
- 556
- Bit
- 1
Field checks
- Check that emergency and common loads are within range.
- Restart and verify operation.
- Contact Inversol if the problem repeats.
FAQ
What does EcoBSS F18 mean?
Hardware AC overcurrent fault
What should I check for EcoBSS F18?
- Check that emergency and common loads are within range.
- Restart and verify operation.
- Contact Inversol if the problem repeats.
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).