Troubleshooting; Using Control Module Errors Displayed - IBC SL 20-160 G3 Installation And Operating Instructions Manual

5.3 TROUBLESHOOTING

5.3.1 Using Control Module Errors Displayed

WARNING
Never attempt to repair the
control module (circuit board). If
the control module is defective,
replace it immediately.
SYMPTOM
MAXIMUM IGNITION
TRIALS ERROR
Touch Screen Message:
Error – Ignition Failure after 3
tries
Boiler has failed to ignite on 3
successive attempts. Boiler in
lockout for 1 hour, then repeats
3-try seq. Consult service
technician if error recurs.
HI LIMIT CUTOFF
TEMPERATURE ERROR
Touchscreen message:
Error – Water High-Limit
Exceeded
LOW WATER CUTOFF
ERROR
Touchscreen message:
Error - Low Water Cutoff
5-6
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
No spark when igniting.
Igniter probe/flame
sensor disconnected.
Manual gas shutoff is
closed or gas line not
fully purged.
Gap between igniter
probe rods is too large
or too small.
Spark, but no ignition.
Boiler ignites, but shuts
off at the end of the
ignition trial. Improperly
grounded pressure vessel/
burner or unserviceable
ignition lead or spark
module.
Water temperature
exceeds hi-limit. Boiler is
in hard lockout mode.
The Safety and Ignition
module has detected a
low water condition.
REMEDY
Check that igniter lead is secure at the control module
and at the probe.
Check for gas flow. Open manual gas shutoff and
reset boiler.
Adjust ignitor probe rod gap between 1/8th and
3/16th (3.2-4.7mm).
Check spark module is sending power to gas valve
– close gas supply, then disconnect (black) electric
housing from face of gas valve, gently spread plastic
tabs to open, and look for 24vac voltage during an
ignition cycle. Replace module if no current detected
• Ensure pressure vessel is grounded.
• Check the igniter probe/flame sensor is electrically
isolated from the vessel, and its ceramic insulator
is intact.
• Replace ignition lead
• Replace spark module
See Section 5.2.4.
See Section 5.2.4.
INSTALLATION AND OPERATION INSTRUCTIONS