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2. PROLONGED SHUTDOWN. ANTI-FREEZE PROTECTION
Do not drain the whole system as filling up with water again could cause unnecessary and harmful scale to build up inside the
boiler and the heating elements. If the boiler is not used during winter and is therefore exposed to the danger of frost, add some
specific anti-freeze to the water in the system (e.g.: propylene glycol coupled with corrosion and scale inhibitors). The electronic
boiler management system includes a "frost protection" function for the heating system which, when delivery temperature falls
below 5°C, lights the burner until a delivery temperature of 30°C is reached.
The function is operative if: the boiler is electrically powered, there is gas, system pressure is normal and the boiler is not
blocked.
3. GAS CONVERSION
The boilers can operate both on natural gas (G20) and LPG (G31). All gas conversions must be made by the AUTHORISED
TECHNICAL SERVICE CENTRE.
4. FAULTS
The faults shown on the display are identified with the symbol
complete list of faults, see the following table.
If
appears on the display the fault must be RESET by the user.
To RESET the boiler, press
FAULTS TABLE
Description of fault
10
External probe sensor
20
NTC flow sensor
28
NTC fumes sensor
40
NTC flow sensor
NTC DHW sensor
50
(only for heating-only model with storage boiler)
52
Solar DHW sensor (if connected to a solar plant)
73
Solar manifold sensor (if connected to a solar plant)
Communication problem between boiler board and control unit.
83
Probable short circuit on wiring.
Address conflict between control units
84
(internal fault)
98
Accessory not detected or recognized (*)
109
Air in boiler circuit (temporary fault)
Safety thermostat/exchanger flange thermostat (**) tripped due
110
to over temperature (pump probably blocked or air in heating
circuit)
111
Safety thermostat tripped due to overtemperature.
117
Pressure in hydraulic circuit too high
118
Pressure in hydraulic circuit too low
(*)
After powering up the boiler (or after a Reset for lockout), the error appears on the display once the self-check is completed. The fault code
is displayed permanently if the accessory is not recognized.
(**) See Section "ADJUSTMENT AND SAFETY DEVICES".
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.
7221369.01 (1-03/15)
. If faults are displayed frequently, call the Authorised Service Engineer.
and a number (fault code). For a
Description of fault
No circulation safety trip
125
(control performed via a temperature sensor)
128
No flame
130
Fumes NTC tripped due to overtemperature
133
Ignition failure (4 attempts)
151
Boiler board internal fault
152
Generic parameter setting error
153
Hardware reset button pressed more than 10 seconds
160
Fan fault
321
NTC domestic hot water sensor faulty
Generic parameter setting error of solar plant
343
(if connected to a solar plant)
384
Abnormal light (parasite flame – internal fault)
385
Input voltage too low
386
Fan speed threshold not reached
No circulation safety trip
430
(control performed via a pressure sensor)
No functional hearth or safety thermostat tripped due to over
432
temperature (E110)
28
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