27
20011755
GB
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 2) (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
10.2 Operating faults
10
Faults / Solutions
FAULTS
POSSIBLE CAUSE
SOLUTION
The burner does not 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.
Heater or enabling thermostats are faulty.
Replace them.
The connections in the control box are wrongly
inserted.
Check and connect completely all the
plugs.
The burner goes into
lockout mode before or
during the pre-purging.
The flame detector sees extraneous light.
Eliminate the light.
Burner runs normally in
the prepurge and ignition
cycle and locks out after 5
seconds ca.
The flame detector is dirty.
Clear it.
The flame detector is faulty.
Replace 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 igni-
tion 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 CAUSE
SOLUTION
The burner goes into
lockout mode during
operation.
Flame disappears four times.
Clean or replace the flame detector.
Replace the dirty or deteriorated nozzle.
Failure to go off.
Check the efficiency of the flame detector.
Check the efficiency of the piston on the pressure
adjuster.
Check the efficiency of the pump cut off valve.