54
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
2.5 FAULT AND ANOMALY SIGNALS
e 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 aer
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 over-
heating internally, the boiler goes into overheating block.
Press the Reset button (1)
03
Flue safety thermostat
block
During normal operation, if a fault causes excessive ue gas
overheating, the boiler blocks
Press the Reset button (1)
04
Contacts resistance
block
e P.C.B. detects a fault on the gas valve supply. Check its
connection. (the anomaly is detected and displayed only in
the event of a request).
Press the Reset button (1)
05 Delivery probe fault e board detects an anomaly on the ow NTC probe. e boiler does not start (1)
06 DHW probe fault
e board detects an anomaly on the domestic hot water
NTC probe. In this case only the antifreeze function is in-
hibited
In this case the boiler continues to
produce domestic hot water but not
with optimal performance and with
possible scalding risk(1)
08 Maximum N° of resets Number of allowed resets already performed.
e anomaly can be reset 5 consecu-
tive times, aer which the function is
inhibited for at least one hour and it is
possible to try once every hour, for a
maximum of 5 attempts. By switching
the appliance on and o again, the 5
attempts are re-acquired
10
Insucient system
pressure
Water pressure inside the central heating circuit that is suf-
cient 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)
16
Fan failure (ue gas
pressure switch)
It occurs in the event of failure of the ue gas pressure
switch (electrical contact closed) or fan speed sensor.
NOTE: the ue gas pressure switch contact is checked only
when the burner is ignited.
If normal conditions are restored the
boiler restarts without having to be
rese t (1)
20 Parasite ame block
is occurs in the event of a leak on the detection circuit or
anomaly in the ame control unit.
Press the Reset button (1)
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Service Centre)
(2) e anomaly can only be veried in the list of errors in the “Information” menu