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43
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
Error
Code
Anomaly
signalled
Cause
Boiler status / Solution
31
Loss of remote control
communication
This occurs if an incompatible remote control is connected, or if
communication between the boiler and the remote control is lost.
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" function cannot
be activated. (1).
36
IMG Bus communica-
tion loss
Communication between the various components is interrupted
due to an anomaly on the boiler control unit, on the zone control
unit or on the IMG Bus.
The boiler does not satisfy the room heat-
ing requests (1).
37
Low power supply
voltage
This occurs when the power supply voltage is lower than the allowed
limits for the correct boiler operation.
If normal conditions are restored the boiler
restarts without having to be reset (1).
38
Loss of flame signal
This occurs when the boiler is ignited correctly and the burner flame
goes out unexpectedly; a new ignition attempt is performed and if
normal conditions are restored, the boiler does not have to be reset
(this anomaly can only be checked in the list of errors present in
the “Information” menu).
If normal conditions are restored the boiler
restarts without having to be reset (1).
43
Block due to loss of
continuous flame signal
This occurs if the ''Flame signal loss'' error occurs many times in a
row within a preset period (38).
Press the Reset button, before restarting,
the boiler will run a post-ventilation
cycle. (1).
44
Block for exceeding the
maximum accumulated
time, close gas valve
opening
This occurs if the gas valve remains open for longer than required
for normal operation, without the boiler switching on.
Press the Reset button (1).
45
ΔT high
If the board detects a sudden and unexpected rise in ΔT between
the system flow probe and return probe, the boiler limits the burner
output to prevent damaging the condensing module; when the cor-
rect ΔT has been restored, the boiler returns to normal operation.
Make sure there is water circulating in the
boiler, that the pump is configured accord-
ing to system requirements and that the
return probe works properly (1).
46
Low temperature safety
thermostat (optional)
During normal operation, if an anomaly causes excessive over-
heating of the flow temperature in low temperature conditions, the
boiler blocks.
In this case, after suitable cooling, it is
possible to reset the thermostat (see relative
instructions sheet) (1).
47
Burner power limita-
tion
Should flue high temperature be detected, the boiler reduces power
supplied so as not to damage it.
(1).
49
High temperature
block on return probe
This occurs when the heat exchanger return circuit reaches a tem-
perature that is too high.
Make sure that water circulates properly
in the boiler and that the three-way valve
works properly. Press the Reset button (C)
to eliminate it (1).
(1) If the shutdown or fault persists, contact an authorised company.