20136130
38
GB
Faults - Possible causes - 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.
In most cases, an operation irregularity leads to the lighting up of
the signal inside the reset button of the control box (Fig. 7 on
page 14).
When lock out lamp lights the burner will attempt to light only after
pushing the reset button If ignition is then normal, the lockout 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 Tab. U and Tab. V.
8.1
Start-up problems
8
Faults - Possible causes - Solutions
WARNING
In the event the burner stops, in order to prevent
any damage to the installation, do not unblock the
burner more than twice in a row. If the burner
locks out for a third time, contact the customer
service.
DANGER
In the event there are further lockouts or faults
with the burner, the maintenance interventions
must only be carried out by qualified, authorised
personnel, in accordance with the contents of this
manual and in compliance with the standards and
regulations of current laws.
Faults
Possible Causes
Solution
The burner does not start when
the limit thermostat closes (TL).
Lack of electrical supply.
Check presence of voltage in the L1-N clamps of
the 7 pin plug.
Check the conditions of the fuses.
Check that safety thermostat (TS) is not in lockout.
Lack of gas.
Check the gate 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 completely all the
plugs.
The air pressure switch is changed over to the
operational position.
Replace the pressure switch.
Burner runs normally in pre-
purging and ignition cycle and
locks out after the safety time.
The phase-neutral connection is inverted.
Invert them.
The earth connection lacks or is inefficient.
Make the earth connection efficient.
The ionisation probe is earthed or not in con-
tact 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 necessary set it ac-
cording to the instructions of this manual.
Reset the electrical wiring.
Replace the faulty connection.
Burner starts with an ignition
delay.
The ignition electrodes is wrongly positioned.
Adjust it according to the instructions of this man-
ual.
Air output is too high.
Set the air output according to the instructions of
this manual.
Valve brake is too close with insufficient gas
output.
Adjust it.
The burner locks out after the
pre-purging phase due to
flame-failure.
The solenoid valves is passing too little gas.
Check the pressure in the network and/or adjust
the solenoid valve according to the instructions of
this manual.
The solenoid valve is defective.
Change them.
The ignition arc is irregular or has failed.
Check the right insertion of the connectors.
Check the right position of the electrode according
to the instructions of this manual.
The pipe has not been purged from the air.
Carry out a complete breathing of the line of gas-
supply.
The burner locks out during the
pre-purging phase.
The air pressure switch does not change over
to the operational position.
The pressure switch is faulty, replace it.
The air pressure is too low, (the head is bad adjust-
ed).
The flame exists.
Faulty valves: replace them.
