IBC Technologies · Error codes
IBC SL G3 “Unhandled error code” alert
Error – Unhandled error code
The manual reserves this alert for unforeseen conditions the controller software does not have a specific message for. The guidance is to contact IBC technical support with the details rather than guess.
Applies to
This alert is shown by the V-10 touchscreen controller on SL Series G3 residential boilers (SL 10-85 G3, SL 14-115 G3, SL 20-160 G3 and SL 30-199 G3), as documented in IBC Installation & Operating Manual — SL 10-85 G3 / SL 14-115 G3 / SL 20-160 G3 / SL 30-199 G3, doc 120-276E13, sections 9.2–9.4.
Controller: V-10 touchscreen controller. Source manual: 120-276E13 (2026-08-11).
Why a code is not a diagnosis
By definition this alert is undocumented, so nothing about its cause can be assumed. The controller's log, software version and the circumstances when it appeared are what technical support will need.
Safe things to observe
- Note the exact alert text, when it appears, and what the boiler was doing at the time.
- If the boiler is off and stays off, call a licensed technician; do not force repeated restarts.
- If you smell gas or a CO alarm sounds, follow the emergency steps first.
Do not
- Do not ignore an unhandled alert in the hope it clears forever.
How professional service helps
- A technician records the controller log and software version and contacts IBC technical support as the manual directs.
- Supply and environmental causes are ruled out while the log is reviewed.
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.
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
- IBC Installation & Operating Manual — SL 10-85 G3 / SL 14-115 G3 / SL 20-160 G3 / SL 30-199 G3, doc 120-276E13, sections 9.2–9.4 · 120-276E13 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.