6
FAULT-FINDING CHART
SOLUTION
CAUSE
FAULT
The burner does not start.
The burner starts, there is
no flame and thus it goes
automatically into blocking
mode.
The burner starts, the fla-
me is formed but then the
burner goes into blocking
mode.
a) no electricity.
b) gas fails to reach the burner.
a) the gas valves do not open.
b) there is no jump spark between
the electrodes’ tips.
c) the air pressure switch does not
give its enabling signal.
a) the control electrode either fails
to detect the presence of the
flame or it does so inadequa-
tely.
a) check the mains fuses and the
control box fuses.
Check the thermostat line and the
gas pressure switch line.
b) check that the cut-off devices posi-
tioned along the feeder pipe open
properly.
a) check operation of the valves.
b) check ignition transformer is
working properly, and check the
position of the electrode tips.
c) check the air pressure switch setting
and the working of the switch itself.
a) check the control electrode posi-
tion - check the ionisation current
level.
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