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10
Faults - Probable causes - Solutions
Below is a list of some of the causes and possible solutions to a
series of problems that might be encountered and could cause a
failure to start or irregular burner operation.
A fault turn-on the led into the reset button of the control box (see
3, Fig. 1 to page 8).
10.1 Burner start-up difficulties
Faults
The burner does not start
when the limit thermostat
closes.
The burner goes into lock-
out mode before or during
the pre-purging.
Burner runs normally in the
prepurge and ignition cycle
and locks out after 5 sec-
onds ca.
Burner starts with an igni-
tion delay.
(*) In digital applications during oil pre-heating the reset button
colour is GREEN flashing (See "Ignition prevented in case of
extraneous light" on page 21).
(**) In digital applications during safety time the reset button col-
our is GREEN blinking (See "Ignition prevented in case of ex-
traneous light" on page 21).
Key for reset button color
(-)
– OFF
G
– GREEN
O
– ORANGE
R
– RED
2903310
Faults - Probable causes - Solutions
Possible cause
Lack of electrical supply.
The flame sensor sees false light.
Heater or enabling thermostats are
faulty.
The connections in the control box
are wrongly inserted.
The flame sensor sees extraneous
light.
The flame sensor is dirty.
The flame sensor is faulty.
Flame moves away or fails.
The ignition electrodes are wrongly
positioned.
Air output is too high.
Nozzle dirty or worn.
The burner will attempt to a new ignition only after pushing the re-
set button. After this if the burner functions correctly, the lock-out
can be attributed to a temporary fault.
However, if lockout continues, you must determine the cause of
the problem and take the action illustrated in the solution column
in the tables below.
Analogic fault
Solutions
diagnostics
Check presence of voltage in the L1 - N clamps
of the 7 pin plug.
OFF
Check the conditions of the fuses.
Check that safety thermostat is not lock out.
OFF
Eliminate the light.
OFF
Replace them.
Check and connect all the plugs and sockets
OFF
properly.
OFF
Eliminate the light.
Clear it.
Replace it.
Check pressure and output of the fuel.
RED
Check air output.
Change nozzle.
Check the coil of solenoid valve.
Adjust them according to the instructions of this
manual.
OFF
Set the air output according to the instructions
of this manual.
Replace it.
The manufacturer cannot accept responsibility for
any damage to persons, animals or property due
to error in installation or in the burner adjustment,
or due to improper or unreasonable use or non
WARNING
observance of the technical instruction enclosed
with the burner, or due to the intervention of un-
qualified personnel.
24
GB
Tab. E
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