3367
16
GB
6.
FAULTS / SOLUTIONS
Below is a list of some of the causes and possible solutions to a series of problems that might be encountered
and could cause a failure to start or irregular burner operation.
A fault usually makes the lock-out lamp light which is situated inside the reset button of the control box (4, fig. 1,
page 2).
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
solution column in the tables below.
6.1
START-UP PROBLEMS
6.2
OPERATING IRREGULARITIES
FAULT
POSSIBLE CAUSES
SOLUTION
The burner doesn’t
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.
Start thermostats are faulty.
Replace them.
The connections in the control box are
wrongly inserted.
Check and connect completely all the
plugs.
Verify the presence of the pin-plug bridge "P".
The burner goes in
safety lock-out
before or during the
pre-purge phase.
The flame detector sees strange light.
Eliminate the light.
Burner runs normal-
ly in the prepurge
and ignition cycle
and locks out after 5
seconds ca.
The flame detector is dirty.
Clear it.
The flame detector is defective
Change it.
Flame moves away or fails.
Check pressure and output of the fuel.
Check air output.
Change nozzle.
Check the coil of solenoid valve.
Burner starts with an
ignition delay.
The ignition electrodes are wrongly
positioned.
Adjust them according to the
instructions of this manual.
Air output is too high.
Set the air output according to the
instructions of this manual.
Nozzle dirty or worn.
Replace it.
FAULT
POSSIBLE CAUSES
SOLUTION
B u r n e r l o c k s o u t
during operation.
Flame disappears 4 times.
Clean or replace flame detector.
Replace dirty or deteriorated nozzle.
Does not shut down.
Check efficiency of flame detector.
Check efficiency of pressure regulator's
piston.
Check efficiency of pump's on-off valve.
