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6.
FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for some problems that could cause a
failure to start or a bad working of the burner.
A fault usually makes the lock-out lamp light which is situated inside the reset button of the control box
(4, fig. 1, page 2).
When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if
the burner functions correctly, the lock-out can be attributed to a temporary fault.
If however the lock out continues the cause must be determined and the solution found.
6.1 START-UP PROBLEMS
FAULTS
T h e b u r n e r d o e s n ' t
s t a r t w h e n t h e l i m i t
thermostat closes.
T h e b u r n e r r u n s n o r -
mally in the prepurge
and ignition cycle and
locks out after about 3
seconds.
The burner starts with
an ignition delay.
The burner lock s out
a f t e r t h e p r e p u r g e
phase due to flame-fail-
ure.
20017630
POSSIBLE CAUSES
Lack of electrical supply.
Lack of gas.
The gas pressure switch does not
close its contact.
The connections in the control box
are wrongly inserted.
The air pressure switch is changed
over to the operational position.
Phase and neutral connection is
inverted.
The earth connection lacks or is ineffi-
cient.
The ionization probe is earthed or not
in contact with the flame, or its wiring
to the control box is broken, or there
is a fault on its insulation to the earth.
The ignition electrodes is wrongly
positioned.
Air output is too high.
Valve brake is too close with insuffi-
cient gas output.
The solenoid valves is passing too lit-
tle gas.
The solenoid valves are defective.
The ignition arc is irregular or has
failed.
The pipe has not been purged from
the air.
Check presence of voltage in the L1 -N
clamps of the 7 pin plug.
Check the condition of the fuses.
Check that safety thermostat is not
lock out.
Check the manual cock opening.
Check that the valves charge over to the
opening position and there are not short
circuits.
Adjust them.
Check and connect all the plugs.
Replace the pressure switch.
Invert them.
Make the earth connection efficient.
Check the right position and if neces-
sary set it according to the instructions
of this manual.
Reset the electrical connection.
Replace the faulty connection.
Adjust it according to the instructions of
this manual.
Set the air output according to the
instructions of this manual.
Adjust it.
Check the pressure in the network and/
or adjust the solenoid valve according to
the instructions of this manual.
Change them.
Check the right insertion of the connec-
tors.
Check the right position of the electrode
according to the instructions of this man-
ual.
Carry out a complete breathing of the
line of gas-supply.
14 GB
SOLUTION
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