IBC Technologies Inc.
48
VFC 15-150 and VFC 45-225
Ignition Problems
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.
Poor gas/air mixture.
Check CO
2
level via analyzer.
Fluctuating gas pressure/
gas pressure too high/too
low.
Check pressure with
manometer during ignition.
Boiler will not attempt to ignite.
i) 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.
ii) 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.
Temperature Sensor Error
LCD 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.
Current outlet temperature
exceeds operating limit.
•
Check water flow
Defective or disconnected
temperature sensor.
•
Check wiring to temperature sensor and control
module.
•
Check temperature sensor – see
Section 4.3.2.1
.
Miscellaneous
LCD Screen Message
Blank – screen dark, but fan
running
Indicative of power-surge damage to appliance
•
Check transformer; replace if damaged
•
Check circuit board for visible damage
