NTI Trinity FTVN CONFL — Cascade Boilers Share a Common Address
CONFL
Cascade boilers share a common address. Two or more boilers in the cascade share a common address on the bus; listed causes are incorrect settings where addresses are not unique, a short circuit on the BUS connection, and incorrect bus wiring polarity.
Applies to
This communication or network fault code is displayed by the FTVN Series I control on FTVN Series I models (FTVN085, FTVN110, FTVN150, FTVN199 and combis FTVN110C, FTVN150C, FTVN199C), as documented in FTVN Series I Installation Startup Maintenance Instructions, doc 420011303800 Rev 2.28.23, Part 13-B Boiler Error Codes (420011303800 Rev 2.28.23). Codes can differ between controller generations, so always check the manual that matches your unit.
- NTI Boilers Trinity FTVN
- NTI Trinity FTVN085
- NTI Trinity FTVN110
- NTI Trinity FTVN150
- NTI Trinity FTVN199
- NTI Trinity FTVN110C
- NTI Trinity FTVN150C
- NTI Trinity FTVN199C
Controller: FTVN Series I control. Source manual: 420011303800 Rev 2.28.23 (2023-02-28).
Why a code is not a diagnosis
A communication code involves the link between controls (cascade, remote, sensors on a bus). Another unit being off, a wiring fault or an address conflict can all produce it.
Safe things to observe
- Check that every appliance in a multi-unit plant has power.
- Report the code together with any other codes on the system.
Do not
- Do not re-address or rewire control networks yourself.
How professional service helps
- A technician verifies power, wiring and settings across the connected units.
- Combustion and safety devices are verified with an analyser and the manufacturer's procedure after any repair.
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Frequently asked questions
Can I clear this code myself?
Clearing a code without fixing its cause usually just brings it back. Note the code, check the safe items on this page, then call a licensed technician. If your appliance manual describes a user reset for this exact code and it stays away, no call may be needed.
Boiler locked out? Call with the alert text ready.
The brand, model and this alert are passed along when you request service online, so the technician arrives prepared.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- FTVN Series I Installation Startup Maintenance Instructions, doc 420011303800 Rev 2.28.23, Part 13-B Boiler Error Codes · 420011303800 Rev 2.28.23 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.