Troubleshooting - Fontana Forni MAESTRO 60 User Manual

FAILURE TO SWITCH ON OR MALFUNCTIONS
CAUSES AND REMEDIES:
IGNITER: If it does not work, the air/gas mixture fails to ignite, check the status of the igniter batteries (1.5v
AA), if discharged or with signs of oxidation replace them. For long periods of non-use it is advisable to remove
the battery to avoid malfunctions or damage to the igniter itself. If the battery is good, check the cable and
spark plug if they are damaged and/or disconnected, replace if they are damaged. Check if the circuit works
correctly by pressing the button with the gas closed, if you see the spark pop on the burner it means that the
circuit works otherwise check the connections again. If the battery, cables and spark plug are connected cor-
rectly but the system is not working, the spark generator must probably be replaced. (See dedicated section
for parts replacement)
VALVE: if damaged, it may not allow gas to pass or interrupt the flow.
If the knob is in the "max flame" position, the gas flow does not pass, make sure that you have first opened the
valve on the cylinder (and that it is full) or the gas tap. In the first phases of ignition, keep the knob pressed to
bypass the safety of the thermocouple and be able to ignite the flame. If YOU manage to ignite the flame but
when the knob is released it goes out, it means that the thermocouple has not yet reached the temperature to
keep the circuit open, repeat the ignition procedure and keep the knob pressed for longer. If after this opera-
tion the flame goes out, check that the thermocouple is connected and in position and that it is not damaged,
in this case replace it. If the thermocouple is replaced but the problem is not solved, the valve must probably
be replaced. (See dedicated section for part replacement). It could also happen that the ignition takes place
correctly but by putting the valve knob in the minimum position the flame cannot be switched on indepen-
dently; in this case it is necessary to act on the minimum register by raising the gas supply (the adjustment is
fixed and set at the factory and must not be modified, but in case of replacement of parts a new adjustment
may be necessary).
BURNER: may backfire and partially ignite.
If there are flame returns, immediately close the gas supply (cylinder or domestic line) and turn off the fire.
Probably the venturi tube has obstructions that must be removed, even simple cobwebs can compromise its
operation. If the flame front does not burn completely over the entire length of the burner in addition to not he-
ating well, crackles or flame returns may occur; in this case make sure that all the burner holes are free and not
obstructed by food residues from previous uses. If previous adjustments or injector replacements have been
made, make sure that the air/gas carburation is correct for optimal operation. It may also depend on fitting an
incorrectly sized calibrated hole injector to the gas used. If there are no obvious obstructions, the holes are
regularly opened and the carburation is regular but the problems still exist, it may be necessary to replace the
entire burner as it is defective or worn. (See dedicated section for part replacement). If regularly maintained,
cleaned and used correctly, its duration over time is considerable.
Have a technician perform the control and maintenance operations. Some malfunctions may also depend
on the incorrect positioning of the sensors on the burner. If the thermocouple is not at the correct distance
from the support on the burner, it could misread the temperature and not work properly or wear out quickly
and have a short life cycle. The same applies to the ignition spark plug, if it is too far away it may not be able
to release the spark to ignite the burner or if it is brought into contact with the burner the pulse is discharged
without generating the spark.
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