Partner Academy · EcoBSS / FLEX
Fault
3P HV
F28
DCIOver_M1_Fault
Inverter 1 DC component high fault
Academy field checklist (DCIOver_M1_Fault) — no EcoBSS service-table row for this bit.
Register map
- Family
- Three-phase HV
- Register
- 556
- Bit
- 11
Field checks
- Check grid CT / sensor path for inverter 1 and look for DC offset on AC current.
- Verify load balance and that sensors are seated; escalate if offset stays high.
- Contact Inversol if the fault returns after a clean power cycle.
FAQ
What does EcoBSS F28 mean?
Inverter 1 DC component high fault
What should I check for EcoBSS F28?
- Check grid CT / sensor path for inverter 1 and look for DC offset on AC current.
- Verify load balance and that sensors are seated; escalate if offset stays high.
- 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).