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85
AST 14 C 258/00
Boiler shutdown, message
flashing:
Failure on the mixed
zone flow probe
(showing the zone
number)
Probe disconnected or
faulty
Reconnect the probe
or replace it, if
necessary.
The probe detects a
value outside the
permitted range
Check the probe is the
NTC type.
Boiler shutdown, picture flashes:
The fan rpm value does
not correspond to the
required ones
Obstructions inside the
flue gas duct
Check for any
obstruction inside the
flue gas duct
Faulty fan
Replace the fan
Faulty boiler board
Replace boiler board
Fan is faulty
Fan wrongly
connected.
Check connections
Fan is faulty
Replace it
Boiler shutdown, message
flashing:
No communication
between main board
and additional boards
The main board cannot
find all the additional
boards, or it finds more
than are actually
connected
Check the value of
parameter P60 - it
must correspond to the
number of additional
boards used.
Boiler shutdown, message
flashing:
Hydraulic configuration
not allowed
The main board does
not recognise the
probes connected for
correct operation
Check the value of
board configuration
parameter P3.
Boiler shutdown, message
flashing:
Safety circuit hardware
failure (fan relay)
Replace the main
board.
Boiler shutdown, message
flashing:
Safety circuit hardware
failure (gas valve relay)
Replace the main
board.
Boiler shutdown, picture flashes:
Maximum deviation
between flow and
Flow or return probe
fault
Replace the faulty
probe
