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82
AST 14 C 258/00
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TABLE OF TECHNICAL FAULTS
Boiler Status
Malfunction
Probable cause
Solution
Boiler shutdown,
picture flashes:
Burner does not ignite
Gas supply failure
Check gas pressure
Check gas supply cock
or gas network safety
valve intervention
Gas valve is disconnected
Re-connect it
Gas valve is faulty
Replace it
The board is faulty
Replace it
Burner does not ignite:
there is no spark
Ignition relay is faulty.
Replace the electrode
Ignition transformer is
faulty.
Replace the ignition
transformer.
Electronic board does not
ignite. It is faulty
Replace the board
Burner ignites for a few
seconds and goes off
Electronic board does not
detect flame: inverted
phase and neutral
Verify correct neutral
and phase connection
sequence
Detection electrode cable
interrupted
Re-connect or replace
cable
Flame detection electrode
is faulty
Replace the electrode
Electronic board does not
detect flame: it is faulty
Replace the board
Ignition heat input setting
is too low
Increase it
Minimum heat input is not
set correctly
Check burner setting
Boiler shutdown, picture
flashes:
The flow double probe
check has been triggered
CH water does not flow in
the system: pipes might be
clogged, thermostatic
valves might have shut,
system stopcocks might be
closed
Check system status
Circulation pump is
blocked or faulty
Check the circulation
pump
One of the two flow probes
is faulty.
Check flow probes.
Boiler shutdown,
picture flashes:
The flue gas thermostat
does not give the
consensus.
Air intake or flue gas
discharge flow is nor
correct.
Check air intake/flue gas
vent ducts: clean or
replace if necessary.
Flue gas thermostat is
faulty
Check flue gas
thermostat: replace it if
faulty.
Combustion fan is not
working properly.
Check the fan.
The board is faulty
Replace it
