10
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.
A fault usually makes the lockout lamp light come on which is situated inside the reset button of the control box 6) (Fig. 3).
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 lockout can be attributed to a temporary fault.
If however the lock out continues, the cause must be determined and the remedies shown in the following table adopted.
10.1 Burner start-up difficulties
FAULT
The burner doesn't start
when the limit thermostat
closes.
The burner goes in safety
lock-out before or during
the pre-purge phase.
Burner runs normally in
the prepurge and ignition
cycle and locks out after 5
seconds ca.
Yellow flame.
Burner starts with an igni-
tion delay.
20013962
Faults / Solutions
POSSIBLE CAUSES
Lack of electrical supply.
Heating and start thermostats are faulty.
The connections in the control box are wrongly
inserted.
The photoresistance sees strange light.
The photoresistance is dirty.
The photoresistance is defective.
The fibre optic is dirty.
The fibre optic is not in line with the hole of the
diffuser disc-holder assembly.
Flame moves away or fails.
Nozzle dirty or worn.
Defect in the air output.
Pump pressure is not correctly set.
Air suction inlet is clogged.
Obstruction in the exhaust circuit.
The ignition electrodes are wrongly positioned.
Air output is too high.
Nozzle dirty or worn.
SOLUTION
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.
Replace them.
Check and connect completely all the plugs.
Eliminate the light.
Clear it.
Change it.
Clear it.
Check the line-up.
Check pressure and output of the fuel.
Check air output.
Change nozzle.
Check the coil of solenoid valve.
Replace it.
Adjust the air output.
Verify the pressure and the output of the fuel and
adjust them according to the instructions of this
manual.
Clear it.
Clear it.
Adjust them according to the instructions of this
manual.
Set the air output according to the instructions of
this manual.
Replace it.
26
GB