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LMV2635.EN.202001_V2
Because of the many potential causes it is very hard to determine why the flame
failure occurs. The start sequence phase when the failure occurs may provide
additional information.
Write down the error code indicated in the faults section
on the display of the burner management system
.
Potential causes
No ignition spark:
•
Defect ignition transformer.
•
Defect or incorrectly adjusted ignition electrodes.
•
Loose ignition cables.
•
Spark not in the correct position (Refer to information on Earth/mass).
No pilot flame:
•
Defect gas solenoid (pos. MK).
•
No combustible gas mixture, does not ignite.
•
Pilot valve isn’t detected by flame monitoring unit or flame signal is too
low.
No main flame:
•
Defect safety valve(s) (pos. VA1 and VA2).
•
The air-gas ratio is not appropriate, because of which the air-gas mixture
does not ignite, or even goes out during operation.
•
Main flame is not detected by the flame monitoring unit because the
flame is too low.
Flame failure before gas valves have opened:
•
Defect UV scanner.
•
Inappropriate lighting, for example, through sight glass.
•
IMPORTANT:
After a failure the reset button has to be pressed to reset a failure.
Before reset, note the position or symbol in the screen of the burnercontrolbox.
Attention!!
It’s possible that maximum thermostat and lowwater float device are
mechanical locked. The reset button is on the safety device itself and should be
reset first. I
f the burner doesn’t start it’s possible that there’s a failure on the CO
2
-
dosingunit and/or CO-detector.
