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2.7 FAULT AND ANOMALY SIGNALS
The boiler indicates a possible anomaly through a code flanked by the symbol of a key “
” in the centre of the display and the message
“boiler anomaly” at the bottom of the display itself (Fig. 44).
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.
Press the Reset button (1)
02
Safety thermostat
block (overheating
safety device)
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 flue gas
overheating, the boiler blocks.
Press the Reset button (1)
04
Contacts resistance
block
The 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
The board detects an anomaly on the flow NTC probe.
The boiler does not start (1)
07
Chimney sweep
function
The boiler is in chimney sweep operation.
(3)
08
Maximum N° of resets
Number of allowed resets already performed.
The anomaly can be reset 5 times
consecutively, after which the
function is inhibited for at least one
hour. One attempt is gained every
hour for a maximum of 5 attempts. By
switching the appliance on and off
again, the 5 attempts are re-acquired.
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.
12
Storage tank probe
anomaly
The board detects an anomaly on the storage tank probe.
The boiler cannot produce domestic
hot water (1)
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Service Centre)
(2) The anomaly can only be verified in the list of errors in the “Information” menu
(3) Error displayed only on CAR
V2