________________________________________________________________________________
96
AST 14 C 255/00
Boiler shut-down, picture
flashes:
Safety circuit
hardware fault
(fan
relay)
Replace main board
Boiler shut-down, picture
flashes:
Safety circuit
hardware fault
(gas
valve relay)
Replace main board
Boiler shut-down,
picture flashes:
Boiler combustion
chamber recognition
failure
(to reset the boiler, the
power supply must be
cut)
Combustion air intake is
insufficient or flue gas vent
is difficult
Check air intake/flue
gas vent ducts: clean
or replace as
necessary
Flue gas exhaust pressure
switch is faulty
Check flue gas
pressure switch:
replace it if faulty.
Silicone pipe of flue gas
pressure switch clogged or
not connected
Connect or clean pipe
as necessary
Fan is faulty
Replace it
Boiler shut-down,
picture flashes:
Incompatibility
between boiler board
and interface board
Boiler board and interface
board don't belong to the
same type: atmospheric /
condensing
Check boiler board
and
interface board type
Boiler shut-down, picture
flashes:
Gas valve modulation
coil fault
Connection of electronic
board to the gas valve
modulation coil non correct
or missing
Check electric
connections
Gas valve modulation coil
is faulty
Replace the gas valve
Boiler shut-down, picture
flashes:
Max. number of reset
attempts from
interface reached
(to reset the boiler, the
power supply must be
cut)
Presence of one error that
can not be reset
Work directly on the
boiler
