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Safety thermostat tripped due to overtemperature (pump
110
probably blocked or air in heating circuit).
117
Pressure in hydraulic circuit too high (> 2.7 bar)
118
Pressure in hydraulic circuit too low
No circulation safety trip.
125
(control performed via a temperature sensor)
128
No flame
129
Loss of flame at ignition
130
Fumes NTC tripped due to overtemperature
133
Ignition failure (5 attempts)
134
Gas valve blocked
Internal board error
135
Gas valve connection error
154
Delivery/return probe control test
160
Fan fault
Intervention of safety thermostat for excess temperature in low
178
temperature system
317
162
Incorrect power supply frequency
384
164
Parasite flame (internal error)
385
165
Input voltage too low
CH = central heating.
(*) External Sensor: cold resistance value: approximately 1 kΩ @ 25° C (resistance decreases as temperature rises).
(**) NTC delivery, return and DHW sensor: cold resistance value: approximately 10 kΩ @ 25° C (resistance decreases as temperature rises).
(***) NTC fumes probe: cold resistance value: approximately 20 kΩ @ 25° C (resistance decreases as temperature rises).
In the event of a fault, the display backlighting indicates the error code. 5 reset attempts can be performed after which the
boiler shuts down. Wait 15 minutes before attempting to reset the boiler again.
7812938 (03-01/23)
Check pump operation.
Check the pump power input wiring.
Check that the limit thermostat is undamaged and replace it if
necessary.
Check the continuity of the limit thermostat wiring.
Check that the pressure in the system is correct
See the FILLING THE SYSTEM section.
If the pressure in the CH circuit is < 0.5 bar, perform filling (see
the FILLING THE SYSTEM section).
Check the hydraulic pressure switch works correctly.
See the actions indicated in E109.
Check the flame sensing electrode is in good condition
and correctly positioned (see the ANNUAL SERVICING -
POSITIONING THE ELECTRODES section). Remove any
oxidation on the sensing electrode and burner using fine
sandpaper.
Check the wire is uninterrupted and makes good contact with
the flame sensing electrode and the ignition switch.
See the actions indicated in E92.
Check the flame sensing electrode is in good condition
and correctly positioned (see the ANNUAL SERVICING -
POSITIONING THE ELECTRODES section).
Check the wire is uninterrupted and makes good contact with
the flame sensing electrode and the ignition switch.
Check for any recirculation of fumes.
Check the heat exchange level of the water-fumes exchanger:
possible insufficient circulation or presence of scale.
Check the fumes NTC probe (***).
Check that the gas valve is open and there is no air in the gas
supply circuit.
Check the gas supply pressure.
Check the wire is uninterrupted and makes good contact with
the flame sensing electrode and the ignition switch.
See the actions indicated in E92.
Check correct operation of the condensate drainage.
Remove any oxidation on the sensing electrode and burner
using fine sandpaper.
Check the gas supply pressure.
Check the integrity and position of the sensing and ignition
electrodes and their wiring (see the ANNUAL SERVICING -
POSITIONING THE ELECTRODES section).
If necessary, replace the electronic board.
Check the connections between the gas valve and the
electronic board.
See the actions indicated in E109.
Check correct operation of the fan.
Check that the fan power supply wiring is connected to the
electronic board.
Check correct operation of the pump and the water circulation
in the low temperature system.
Check the pump power input wiring.
Check whether the incorrect electric power supply frequency
is due to causes outside the boiler, in which case contact the
power supply company.
Check correct operation of the gas valve.
Input voltage V<175V.
Check whether the power supply reductions are due to
reasons other than the boiler. If so, contact the electricity
provider.
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