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TrOUBLesHOOTing
TYPe Of irregULariTY
The burner goes to lock-out with the
flame on (red lamp on). The trouble is in
the flame control device.
The burner goes into lock-out spraying
liquid fuel but the flame does not ignite
(red light on).
The trouble is in the ignition device,
providing the fuel is in a good condition
(not polluted)
with water or other impurities) and suf-
ficiently atomized.
The burner goes into "lock-out", gas
flows, but there is no flame (red light on).
fault in ignition circuit.
The burner goes into lock-out spraying
liquid fuel but the flame does not ignite.
(red light on).
The burner goes into "lock-out", gas
flows, but there is no flame (red light on).
noisy burner pump
POssiBLe CaUse
1) photoresistance severed or fouled with
smoke
2) Insufficient draught
3) Flame detector circuit interrupted
4) Dirty disk or head
1) Ignition circuit severed
2) The ignition transformer leads have dried
up
3) The ignition transformer cables are not
well connected.
4) Ignition transformer severed
5) The electrode tips are not at the correct
distance
6) Electrodes discharge to earth because
they are dirty or their insulation is
cracked: check also underneath the insu-
lator clamps
1) pump pressure is not normal
2) Water in the fuel
3) Excess combustion air
4) Air passage between disk and blast tube
5) Nozzle worn out or fouled
1) Air/gas ratio incorrect.
2) Gas piping has not been properly bled of
air (in the case of first ignition).
3) The gas pressure is insufficient or exces-
sive.
4) Air passage between disk and head too
narrow.
1) pipe diameter too small
2) Air infiltration in the pipes
3) Dirty filter
4) Excessive distance between the tank and
the burner or many accidental leakages
(elbows, curves, choking etc.)
5) Deteriorated flexible pipes
23 / 30
0006160034_201307
sOLUTiOn
1) Clean or replace it
2) Check all the smoke ducts in the boiler
and in the chimney
3) Replace the unit
4) Clean
1) Check the entire circuit
2) Replace them
3) Tighten them
4) Replace it
5) Re-set them in the required position
6) Clean or replace them, if necessary
1) Re-set it
2) Remove it from the tank with a suitable
pump (never use the burner pump for this
job)
3) Reduce combustion air
4) Rectify the position of the combustion
head adjusting device
5) Clean or replace it
1) Check and adjust air/gas ratio.
2) Bleed the gas pipe again, with due cau-
tion.
3) Check the maximum gas pressure value
at the time of ignition (use a water pres-
sure gauge, if possible).
4) Adjust the disk/head opening.
1) Replace it according to instructions
2) Check and eliminate infiltration's
3) Remove and wash it
4) Adjust the length of the suction pipe and
shorten its distance
5) Replace them
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