Ignition Problems - IBC VFC 15-150 Installation And Operating Instructions Manual

SYMPTOM
TEMPERATURE SENSOR
ERROR
Touch Screen Message:
Error - Max. In-Out Temp.
Exceed. -> Check water flow
Water temperature signal
not within acceptable range.
Potential flow or sensor failure.
Consult service technician.
MISCELLANEOUS
Touch Screen Message:
Blank – screen dark, but fan
running Indicative of power-
surge damage to appliance

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
TROUBLESHOOTING
VFC 15-150, VFC 45-225 MODULATING GAS BOILERS
DIAGNOSIS
Current outlet
temperature exceeds
operating limit.
Defective or
disconnected
temperature sensor.
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
piping.
No power to ignition
control module.
Igniter probe/flame
sensor disconnected.
Blown fuse in ignition
module.
Defective Control
Module.
No power to boiler.
Defective transformer.
REMEDY
•
Check water flow.
•
Check wiring to temperature sensor and
control module.
•
Check temperature sensor. See Section
5.2.1.
•
Check transformer; replace if damaged.
•
Check circuit board for visible damage.
REMEDY
Reconnect ignition lead.
Ensure probe is dry by re-running post-purge;
otherwise, clean or replace igniter probe.
Check CO2 level via analyzer.
Check pressure with manometer during ignition.
•
Check system wiring.
•
Check air reference tubing.
Reconnect probe.
Check fuse. If blown, replace.
Check ignition output from control module.
Check line voltage .
Check transformer. Reconnect or replace as
needed.
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