3150
16
GB
T h e b u r n e r r u n s n o r -
mally in the prepurge
and ignition cycle and
locks out after about 3
seconds.
Phase and neutral connection is
inverted.
Invert them.
The earth connection lacks or is ineffi-
cient.
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
instructions of this manual.
Valve brake is too close with insuffi-
cient gas output.
Adjust it.
T h e b u r n e r l o c k s o u t
a f t e r t h e p r e p u r g e
phase due to flame-fail-
ure.
The solenoid valves is passing too lit-
tle gas.
Check the pressure in the network and/
or adjust the solenoid valve according to
the instructions of this manual.
The solenoid valves are defective.
Change them.
The ignition arc is irregular or has
failed.
Check the right insertion of the connec-
tors.
Check the right position of the electrode
according to the instructions of this man-
ual.
The pipe has not been purged from
the air.
Carry out a complete breathing of the
line of gas-supply.
T h e b u r n e r l o c k s o u t
d u r i n g t h e p r e p u r g e
phase.
The air pressure switch does not
change over to the operational posi-
tion.
The pressure switch is faulty, change it.
The air pressure is too low, (the head is
bad adjusted).
The flame exists.
Faulty valves: replace them.
The pressure test point (fig. 10) is
badly positioned.
Place it in the right position according to
the instructions of this manual on page
12, chapter 4.5.
The burner continues to
repeat the starting cycle
without going on lock-
out.
The gas pressure in the gas-mains
lies very close to the value to which
the gas pressure switch has been set.
The sudden falling-off pressure at the
opening of the valve causes the
opening of the pressure switch.
H o w e v e r t h i s o n l y t e m p o r a r i l y ,
because the valve immediately closes
again, so then does the pressure
switch, because the pressure builds-
up again, causing the cycle to be
repeated over and over.
Lower and set the pressure switch.
FAULTS
POSSIBLE CAUSES
SOLUTION