20030020
20
GB
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. In most cases, an operation irregularity
leads to the lighting up of the signal inside the reset button of the
control box (1, Fig. 2, page 8).
When this lamp lights on, the burner will attempt to operate only
after pressing the reset button.
After this, if the burner functions correctly, the lockout can be at-
tributed to a temporary fault.
If however the lock out continues the cause must be determined
and the solution found.
8.1
Start-up problems
8
Faults / Solutions
WARNING
In the event of a burner lockout, more than two
consecutive burner reset operations could cause
damage to the installation. On the third lockout,
contact the Aftersales Service.
DANGER
If further lockouts or burner faults occur, interven-
tions must only be made by qualified, authorised
personnel (as indicated in this manual, and in
compliance with the laws and regulations current-
ly in force).
FAULTS
POSSIBLE CAUSES
SOLUTION
The burner does not 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 conditions of the fuses.
Check that safety thermostat is not lock out.
Lack of gas.
Check the manual cock opening.
Check that valve has changed over to open
position and that there are no short circuits.
The connections in the control box are
wrongly inserted.
Check and connect completely all the
plugs.
Burner runs normally in pre-purg-
ing and ignition cycle and locks
out after 3 firing attempts.
The phase-neutral connection is inverted
Invert them.
The earth connection lacks or is inefficient.
Make the earth connection efficient.
Valve lets too little gas through
Check mains pressure and/or adjust the
valve as indicated in this manual.
The gas valve is faulty.
Replace.
The electric ignition arc is irregular.
Check the right insertion of the connectors.
Check the right position of the electrode ac-
cording to the instructions of this manual.
Inspect the quality of the ceramic insulator.
The ionisation 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 right position and, if necessary, ad-
just as indicated herein.
Reset the electrical connection.
Replace the faulty connection.
Lack of gas.
Check the manual cock opening.
Check that valve has changed over to open
position and that there are no short circuits.
Burner starts with an ignition de-
lay.
The ignition electrodes is wrongly posi-
tioned.
Adjust it according to the instructions of this
manual.
Air output is too high.
Set the air output.
Valve brake not open enough, with insuffi-
cient gas allowed through.
Adjust it.
The burner locks out during the
pre-purge phase.
The flame exists.
Faulty valve: change it.
