3095
13
GB
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
POSSIBLE CAUSES
SOLUTION
The burner doesn’t
start when the limit
thermostat closes.
Lack of electrical supply.
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.
Lack of gas.
Check the manual cock opening.
Check that the valves charge over to
the opening position and there are not
short circuits.
The gas pressure switch does not
close its contact.
Adjust them.
The connections in the control box
are wrongly inserted.
Check and connect all the plugs.
The air pressure switch is changed
over to the operational position.
Replace the pressure switch.
The servomotor is locked.
Check the right electrical connection.
The servomotor doesn’t close com-
pletely and therefore it doesn’t pull in
the burner ignition micro: check the
micro working.
The burner runs nor-
mally in the prepurge
and ignition cycle and
locks out after about 3
seconds.
Phase and neutral connection is in-
verted.
Invert them.
The earth connection lacks or is in-
efficient.
Make the earth connection efficient.
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.
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.
The burner starts with
an ignition delay.
The ignition electrodes is wrongly
positioned.
Adjust it according to the instructions
of this manual.
Air output is too high.
Set the air output according to the in-
structions of this manual.
Valve brake is too close with insuffi-
cient gas output.
Adjust it.
