IBC SL Series Installation & Operating Manual page 104

Issue
Boiler will not attempt to ignite.
Fan and / or pump are off. Display
not illuminated
Ignition issues
Diagnosis
Igniter probe/flame
sensor disconnected.
Defective Control
Module.
No power to boiler.
Defective transformer.
100
Section: Troubleshooting
Fix
Reconnect probe.
Check ignition output from control
module.
Check line voltage.
Check transformer. Reconnect or
replace as needed.