________________________________________________________________________________
83
AST 14 C 258/00
Boiler shutdown, picture
flashes:
CH system water pressure
is low
Low water inside heating
system
Fill up system
Leaks in the CH system
Check system
Water pressure switch is
disconnected
Re-connect it
Water pressure switch is not
operating: it is faulty
Replace it
Boiler shutdown, picture
flashes:
One of the two flow
probes is faulty
One of the two probes is
disconnected or in short-
circuit
Reconnect or replace
it
Between the two probes
there is a temperature
difference higher than 8°C
Check the not
correctly set probe and
replace it
Boiler shutdown, picture
flashes:
DHW probe is not working
Disconnected or short-
circuited probe
Reconnect or replace
it
Boiler is not supplying
DHW
DHW flow switch is not
working
System insufficient pressure
or flow rate
Check system
Check DHW flow
switch filter
DHW flow switch probe is
faulty or disconnected
Connect or replace it
Boiler shutdown, picture
flashes:
Flue gas probe is faulty
Disconnected or short-
circuited probe
Reconnect or replace
it
Boiler shutdown, message
flashing:
Failure on tank heater
probe (KRB)
Probe disconnected or short-
circuited
Reconnect the probe
or replace it, if
necessary.
