3313
13
GB
FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for a series of problems that could cause a
failure to start or the poor operation of the burner. A fault in the operation usually switches on the lockout
lamp, situated inside the reset button of the control box (7, fig. 1, page 1). 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. However, if lockout continues, you must determine the cause
of the problem and take the action illustrated in the tables below .
START-UP PROBLEMS
FAULTS
POSSIBLE CAUSES
SOLUTION
The burner does not
start when the limit
thermostat closes.
Lack of electrical supply.
Check for voltage at L1-N terminals in 7-
pin plug.
Check the conditions of the fuses.
Check that safety thermostat is not lock
out.
Gas is not supplied.
Check gate opening.
Make sure that valves have changed
over to open position and that there are
no short circuits.
The gas pressure switch does not
close the contact.
Adjust it.
The connections in the control box are
wrongly inserted.
Check and connect completely all the
plugs.
The air pressure switch has changed
over to the operational position.
Replace the pressure switch.
Burner runs normally in
the pre-purging and igni-
tion cycle and locks out
after 3 seconds ca.
The phase-neutral connection is in-
verted.
Swap them over.
The wiring to the earth is lacking or in-
effective.
Make earth connection efficient.
Ionisation probe has a ground fault or is
not in contact with flame, or there is a
break in its wiring to control box, or
there is a ground fault due to its insula-
tion being defective.
Check right position and, if necessary,
adjust as indicated herein.
Restore electrical connection.
Replace faulty lead.
Burner starts with an ig-
nition delay.
Ignition electrode is wrongly
positioned.
Adjust properly as indicated herein.
Air output is too high.
Set the air output according to the
instructions of this manual.
Valve brake not open enough with in-
sufficient gas allowed through.
Set correctly.
The burner locks out,
after the pre-purging
period, because the
flame does not ignite.
The solenoid valves let too little gas
through.
Check mains pressure and/or adjust the
solenoid valve as indicated in this manu-
al.
The valves are faulty.
Replace them.
The electric ignition arc is irregular or
not present.
Make sure connectors are inserted prop-
erly.
Make sure electrode is in the right posi-
tion as indicated herein.
Air in the piping.
Completely bleed the gas feed line.
