Triangle Tube E98 — Cascade Bus Error
E98
Cascade Bus Error. Communication with other boilers has been lost. The table classifies it as Automatic Reset Blocking Lockouts.
Applies to
This communication or network fault code is displayed by the CTRLMax control on CTRLMax-era models (Prestige Solo 80–399, Prestige Excellence 110 combi, Instinct 110S–199C), as documented in Prestige Solo / Excellence Users Information Manual (2019, CTRLMax) — E-code fault table shared with the Instinct manuals (241573/242194) (2019-08). Codes can differ between controller generations, so always check the manual that matches your unit.
- Triangle Tube Prestige Solo
- Triangle Tube Prestige Excellence (combi)
- Triangle Tube Instinct
- Triangle Tube Prestige Solo 80
- Triangle Tube Prestige Solo 110
- Triangle Tube Prestige Solo 155
- Triangle Tube Prestige Solo 175
- Triangle Tube Prestige Solo 250
- Triangle Tube Prestige Solo 299
- Triangle Tube Prestige Solo 399
- Triangle Tube Prestige Excellence 110
- Triangle Tube Instinct 110S (wall)
- Triangle Tube Instinct 155S (wall)
- Triangle Tube Instinct 199S (wall)
- Triangle Tube Instinct 110S (floor)
- Triangle Tube Instinct 155S (floor)
- Triangle Tube Instinct 199S (floor)
- Triangle Tube Instinct 155C (wall combi)
- Triangle Tube Instinct 199C (wall combi)
- Triangle Tube Instinct 155C (floor combi)
- Triangle Tube Instinct 199C (floor combi)
Controller: CTRLMax control. Source manual: 2019-08 (2019-08).
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
- Prestige Solo / Excellence Users Information Manual (2019, CTRLMax) — E-code fault table shared with the Instinct manuals (241573/242194) · 2019-08 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.