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Error
Anomaly signalled
Code
Loss of remote control
31
communication
IMG Bus
36
communication loss
Low power supply
37
voltage
Loss of flame signal
38
Block due to loss of
43
flame signal
Block for exceeding
gas valve frequent
44
maximum opening
time
Intervention of DIM
v2 safety thermostat
or Low temperature
46
safety thermostat
outside the boiler
(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
(4) Error displayed only on Anomalies log
74
This occurs if an incompatible remote control is connected,
or if communication between the boiler and the remote
control is lost.
Communication between the various components is inter-
rupted due to an anomaly on the boiler control unit, on the
zone control unit or on the IMG Bus.
This occurs when the power supply voltage is lower than the
allowed limits for the correct boiler operation.
This occurs when the boiler is ignited correctly and the
burner flame switches off unexpectedly; a new attempt at
ignition is performed and if normal conditions are re-
stored, the boiler does not have to be reset.
This occurs if the ''Flame signal loss'' error occurs many
times in a row within a preset period (38).
This occurs if the gas valve remains open for longer than
required for normal operation, without the boiler switch-
ing on.
During normal operation, if an anomaly causes excessive
overheating of the flow temperature in low temperature
conditions, the boiler blocks.
V2
Cause
Boiler status / Solution
Disconnect and reconnect the power
to the boiler. If the remote control is
still not detected on re-starting, the
boiler will switch to local operating
mode, i.e. using the controls on the
control panel. In this case, the
"Central Heating" (1) function cannot
be activated.
The boiler does not satisfy the room
heating requests (1).
If normal conditions are restored the
boiler restarts without having to be
reset (1)
If normal conditions are restored the
boiler restarts without having to be
reset (1) (2) (4)
Press the Reset button, before
restarting, the boiler will run a
post-ventilation cycle. (1)
Press the Reset button (1)
In this case, after suitable cooling, it is
possible to reset the thermostat (see
relative instructions sheet) (1)
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