Ignition Issues - IBC Sl Series Installation & Operating Manual

8.3.1 Ignition issues

Issue
Noisy spark when igniting
Boiler rumbles when igniting.
Boiler will not attempt to ignite.
Fan and pump are operating
normally.
Boiler will not attempt to ignite.
Fan and / or pump are off.
Display not illuminated
Ignition issues
Diagnosis
Ignition lead is not firmly
connected.
Contaminants/moisture
on igniter probe/flame
sensor.
Fluctuating gas
pressure/ gas pressure
too high/too low.
Check for proper gas
piping
No power to ignition
control module.
Igniter probe/flame
sensor disconnected.
Defective Control
Module.
No power to boiler.
Defective transformer.
96
Section: Troubleshooting
Fix
Reconnect ignition lead.
Ensure probe is dry by re-running
post-purge; otherwise, clean or
replace igniter probe.
Check CO level via analyzer.
2
Check pressure with manometer
during ignition.
Check system wiring.
Check air reference tubing.
Reconnect probe.
Check ignition output from control
module.
Check line voltage.
Check transformer. Reconnect or
replace as needed.