5-9
TROUBLESHOOTING
SL 30-175, SL 45-260 MODULATING GAS BOILERS
SYMPTOM
DIAGNOSIS
REMEDY
NOISY SPARK WHEN
IGNITING
Ignition lead is not
firmly connected.
reconnect ignition lead.
Contaminants/
moisture on igniter
probe/flame sensor.
ensure probe is dry by re-running post-purge;
otherwise, clean or replace igniter probe.
bOILER RUMbLES WHEN
IGNITING.
Fluctuating gas
pressure/ gas
pressure too high/too
low.
Check Co
2
level via analyzer.
Check for proper
piping.
Check pressure with manometer during ignition.
bOILER WILL NOT ATTEMPT
TO IGNITE. FAN AND PUMP
ARE OPERATING NORMALLY.
No power to ignition
control module.
•
Check system wiring.
•
Check air reference tubing.
Igniter probe/flame
sensor disconnected.
reconnect probe.
Blown fuse in ignition
module.
Check fuse. if blown, replace.
Defective Control
Module.
Check ignition output from control module.
bOILER WILL NOT ATTEMPT
TO IGNITE. FAN AND / OR
PUMP ARE OFF DISPLAY
NOT ILLUMINATED
No power to boiler.
Check line voltage .
Defective transformer.
Check transformer. reconnect or replace as
needed.
5.3.2 Ignition Problems
Summary of Contents for SL 30-175
Page 76: ...NOTES...
