75
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
Error
Code
Anomaly signalled Cause Appliance status / Solution
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 High T Delta
e boiler detects a sudden, unexpected increase in the T
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 T is
restored, the appliance 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)
46
Intervention of DIM
v2 safety thermostat
or Low temperature
safety thermostat
outside the boiler
During normal operation, if an anomaly causes excessive
overheating of the ow temperature in low temperature
conditions, the boiler blocks.
In this case, aer suitable cooling, it is
possible to reset the thermostat (see
relative instructions sheet) (1)
47
Burner power
limitation
Should ue high temperature be detected, the boiler reduc-
es power supplied so as not to damage it.
(1)
48
System ow probe
anomaly
e board detects an anomaly on the system ow probe
(Optional).
e appliance works with possible
system temperature oscillations (1)
49
High temperature
block on return probe
e temperature measured by the return probe is above
90°C. e block is with manual reset.
e error disappears when the
temperature detected by the return
probe drops below 70°C. Press the
Reset button (1)
51
RF communication
failure towards CAR
v2 RF
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).
59
Electric power supply
mains frequency
anomaly
e board detects a main supply voltage frequency anoma-
ly.
e appliance does not start (1)
60
Anomaly pump
blocked
e pump is stopped due to one of the following causes:
Impeller blocked, electrical fault.
Try to unblock the pump as described
in the relative section. If normal
conditions are restored, the appliance
restarts without having to be reset (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
(3) Error displayed only on CAR
V2
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