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2.5 FAULT AND ANOMALY SIGNALS
The boiler signals any anomalies using a code shown on the boiler
display (11) according to the following table:
Error
Code
Anomaly signalled
Cause
Boiler status / Solution
01
No ignition block
In the event of request of room central heating or domestic
hot water production, the boiler does not switch on within
the preset time. Upon appliance commissioning or after
extended downtime, it may be necessary to eliminate the
block. Clogged condensate drain.
Press the Reset button (1)
02
Safety thermostat
block
During normal operation, if a fault causes excessive
overheating internally, the boiler goes into overheating
block.
Press the Reset button (1)
05
Delivery probe fault
The board detects an anomaly on the flow NTC probe.
The boiler does not start (1)
06
DHW probe fault
The board detects an anomaly on the domestic hot water
NTC probe. In this case only the antifreeze function is
inhibited
In this case the boiler continues to
produce domestic hot water but not
with optimal performance and with
possible scalding risk(1)
10
Insufficient system
pressure
Water pressure inside the central heating circuit that is suf-
ficient to guarantee the correct operation of the boiler is not
detected.
Check on the boiler pressure gauge
that the system pressure is between
1-1.2 bar and restore the correct
pressure if necessary (1)
11
Flue pressure switch
anomaly (fan)
This occurs in case of a fault in the flue pressure switch
(electric contact open) or the fan. N.B.: The flue pressure
switch contact is checked only when the burner is ignited.
If normal conditions are restored the
boiler restarts without having to be
reset (1)
16
Fan failure (flue gas
pressure switch)
It occurs in the event of failure of the flue gas pressure swi-
tch (electrical contact closed) or fan speed sensor. NOTE:
the flue gas pressure switch contact is checked only when
the burner is ignited.
If normal conditions are restored the
boiler restarts without having to be
reset (1)
20
Parasite flame block
This occurs in the event of a leak on the detection circuit or
anomaly in the flame control unit.
Press the Reset button (1)
24
Push button control
panel anomaly
The board detects an anomaly on the pushbutton panel.
If normal conditions are restored the
boiler restarts without having to be
reset (1)
27
Circulation
insufficient
This occurs if there is overheating in the boiler due to insuf-
ficient water circulating in the primary circuit; the causes
can be:
low system circulation; check that no shut-off devices are
closed on the heating circuit and that the system is free of
air (deaerated);
circulating pump blocked; free the circulating pump.
If normal conditions are restored the
boiler restarts without having to be
reset (1)
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Service Centre)
