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86
AST 14 C 258/00
return lines
Flow or return probe
disconnected from the
pipe
Reconnect the probe
Air inside the system
Bleed the system
Faulty or clogged by-
pass
Check the by-pass
In the board memory (from P51
to P55) is indicated what
specified below:
Insufficient water flow
rate inside the primary
exchanger body
Primary exchanger
clogging
Clean or replace the
primary exchanger
Air inside the system
Bleed the system
Faulty or clogged by-
pass
Check the by-pass
Too low system
pressure
Restore the pressure
Boiler shutdown, picture flashes
Flow maximum
threshold exceeded
Air inside the boiler
Bleed the boiler by
opening the outlets on
exchanger and pump
Boiler shutdown, message
flashing:
Maximum flow
threshold exceeded
Air inside the boiler
Bleed the boiler by
opening the outlets on
the heat exchanger
and pump.
Circulation of
extraneous hot water
in the boiler
Check there are no
other boilers in a
cascade connection,
or supplementary
sources.
In the board memory (from P51
to P55) is indicated what
specified below
Power reduction for
flue gas high
temperature
Primary exchanger
clogging
Clean or replace the
primary exchanger
