2814
12
GB
OPERATING FAULTS
Burner lock-out due to
: – Flame failure
– Earth probe
– Air pressure switch opening
Burner shut down due to : – Gas pressure switch opening.
The burner starts with
an ignition delay.
The ignition electrodes is wrongly
positioned.
Adjust it according to the instructions
of this manual.
Air output is too high.
Set the air output according to the
instructions of this manual.
Valve brake is too close with insuffi-
cient gas output.
Adjust it.
The burner locks out
after the prepurge
phase due to flame-
failure.
The solenoid valves is passing too
little gas.
Check the pressure in the network and/
or adjust the solenoid valve according to
the instructions of this manual.
The solenoid valves are defective.
Change them.
The ignition arc is irregular or has
failed.
Check the right insertion of the con-
nectors.
Check the right position of the elec-
trode according to the instructions of
this manual.
The pipe has not been purged from
the air.
Carry out a complete breathing of the
line of gas-supply.
The burner locks out
during the prepurge
phase.
The air pressure switch does not
change over to the operational posi-
tion.
The pressure switch is faulty, change it.
The air pressure is too low, (the head
is bad adjusted).
The flame exists.
Faulty valves: replace them.
The pressure test point (9, fig. 9,
page 8) is badly positioned.
Place it in the right position according
to the instructions of this manual on
page 8, chapter 4.1.
The burner continues
to repeat the starting
cycle without going on
lock-out.
The gas pressure in the gas-mains
lies very close to the value to which
the gas pressure switch has been set.
The sudden falling-off pressure at
the opening of the valve causes the
opening of the pressure switch.
However this only temporarily, be-
cause the valve immediately closes
again, so then does the pressure
switch, because the pressure builds-
up again, causing the cycle to be
repeated over and over.
Lower and set the pressure switch.
FAULTS
POSSIBLE CAUSES
SOLUTION
