NTI Trinity TFTN 3P9 — Sched. Maintenance-call for Service
3P9
Sched. Maintenance-Call for Service. The months until the next maintenance time have elapsed, so service the boiler and select RESET from the Setup, Diagnostics, Service menu. The table classifies it as Warning.
Applies to
This maintenance or informational code is displayed by the NTI HMI control (R30) on TFTN floor models (TFTN500, TFTN600, TFTN725, TFTN850), as documented in TFTN 500–850 Installation and Operation Manual, doc 99987545 V.2025-04-24, section 18.0 Table 18-1 (99987545). Codes can differ between controller generations, so always check the manual that matches your unit.
- NTI Boilers Trinity TFTN
- NTI Trinity TFTN085
- NTI Trinity TFTN110
- NTI Trinity TFTN150
- NTI Trinity TFTN199
- NTI Trinity TFTN285
- NTI Trinity TFTN340
- NTI Trinity TFTN399
- NTI Trinity TFTN500
- NTI Trinity TFTN600
- NTI Trinity TFTN725
- NTI Trinity TFTN850
Controller: NTI HMI control (R30). Source manual: 99987545 (2025-04-24).
Why a code is not a diagnosis
This class of message is informational or maintenance-related: the appliance keeps running (or limits output) until the service is performed. No fault may exist beyond the interval being due.
Safe things to observe
- Book the scheduled service; the appliance will tell you when the interval is reached.
Do not
- Do not clear maintenance messages without the maintenance being performed.
How professional service helps
- A technician performs the manufacturer's scheduled maintenance and resets the counter as part of the service.
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
- TFTN 500–850 Installation and Operation Manual, doc 99987545 V.2025-04-24, section 18.0 Table 18-1 · 99987545 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.