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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
The burner does not
start
when
the
limit
thermostat closes.
Burner runs normally in
the prepurge and igni-
tion cycle and locks out
after 5 seconds ca.
Burner starts with an ig-
nition delay.
The burner locks out,
after the pre-purge peri-
od, because the flame
does not ignite.
3288
POSSIBLE CAUSES
Lack of electrical supply.
Gas is not supplied.
The gas pressure switch does not
close the contact.
The connections in the control box
are wrongly inserted.
The
air
pressure
switch
changed over to the operational
position.
The air damper opening motor is
faulty.
The phase-neutral connection is in-
verted
The wiring to the earth is lacking or
ineffective.
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 insu-
lation being defective.
Ignition electrode is wrongly
positioned.
Air output is too high.
Valve brake not open enough with
insufficient gas allowed through.
The solenoid valves let too little gas
through.
The valves are faulty.
The electric ignition arc is irregular
or not present;
Air in the piping.
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.
Check gate opening.
Make sure that valves have changed over
to open position and that there are no
short circuits.
Adjust it.
Check and connect completely all the
plugs.
has
Replace the pressure switch.
Check the connection or replace the mo-
tor.
Swap them over.
Make earth connection efficient.
Check right position and, if necessary, ad-
just as indicated herein.
Restore electrical connection.
Replace faulty lead.
Adjust properly as indicated herein.
Set the air output according to the
instructions of this manual.
Set correctly.
Check mains pressure and/or adjust the
solenoid valve as indicated in this manual.
Replace them.
Make sure connectors are inserted prop-
erly.
Make sure electrode is in the right position
as indicated herein.
Completely bleed the gas feed line.
14 GB
SOLUTION
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