Partner Academy · EcoBSS / FLEX
Fault
3P LV
F29
Parallel_CANBus_Fault
Parallel CAN bus communication fault
EcoBSS service: parallel CAN bus fault.
Register map
- Family
- Three-phase LV (FLEX 3L)
- Register
- 556
- Bit
- 12
Field checks
- In parallel mode, check communication cables and inverter addresses.
- During parallel startup, units may report F29 until all go ON — then it clears.
- If the problem persists, contact Inversol.
FAQ
What does EcoBSS F29 mean?
Parallel CAN bus communication fault
What should I check for EcoBSS F29?
- In parallel mode, check communication cables and inverter addresses.
- During parallel startup, units may report F29 until all go ON — then it clears.
- If the problem persists, 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).