Ignition Issues - IBC EX Series Installation & Operating Manual

8.4.1 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 Check pressure with manometer
No power to ignition control
module.
Igniter probe/flame sensor
disconnected.
Defective Control Module.
No power to boiler.
Defective transformer.
115
8.4.1 Ignition issues
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
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.