Ignition Problems - IBC SL 20-160 G3 Installation And Operating Instructions Manual

5.3.2 Ignition Problems

SYMPTOM
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
5-8
SL 20-115 G2 MODULATING GAS BOILER
SL 10-85 G3, SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS
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.
REMEDY
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.
INSTALLATION AND OPERATION INSTRUCTIONS