45
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
Error
Code
Anomaly signalled Cause Boiler status / Solution
27
Circulation
insucient
is occurs if there is overheating in the boiler due to insuf-
cient water circulating in the primary circuit; the causes
can be:
low system circulation; check that no shut-o 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
rese t (1)
29 Flue probe anomaly e board detects an anomaly on the ue probe. e boiler does not start (1)
31
Loss of remote control
communication
is 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
not detected on re-starting the boiler
will switch to “Summer” mode. In this
case the "Central Heating" (1) function
cannot be activated
36
IMG Bus
communication loss
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.
e boiler does not satisfy the room
heating requests (1).
37
Low power supply
voltage
is 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
rese t (1)
38 Loss of ame signal
is occurs when the boiler is ignited correctly and the
burner ame switches o unexpectedly; a new attempt at
ignition is performed and if normal conditions are re-
stored, the boiler does not have to be reset.
If normal conditions are restored the
boiler restarts without having to be
rese t (1)
43
Block due to loss of
ame signal
is 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
gas valve frequent
maximum opening
time
is occurs if the gas valve remains open for longer than
required for normal operation, without the boiler switch-
ing on.
Press the Reset button (1)
45 T hig h
e boiler detects a sudden, unexpected increase in the ΔT
between the ow probe and the system return probe.
e power of the burner is limited to
prevent damage to the condensation
module and once the right ΔT is
restored, the boiler resumes regular
operation. Make sure there is water
circulating in the boiler, that the pump
is congured according to system
requirements and that the return
probe works properly. (1) (2)
47
Burner power
limitation
Should ue high temperature be detected, the boiler reduc-
es power supplied so as not to damage it.
(1)
51
CAR Wireless
communication
failure
If there is no communication between the boiler and Wire-
less version CAR, an anomaly is signalled. From this mo-
ment, it is only possible to control the system by means of
the control panel of the boiler itself.
Check operation of the Wireless CAR,
check the battery charge (refer to the
relative instructions booklet)
(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
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