Filling The Boiler; Turning Off The Boiler; Prolonged Standstill Of The System. Frost Protection - Baxi LUNA HT 1.450 Installers And Users Instructions

3.9 Fault warnings table
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4. Filling the boiler

5. Turning off the boiler

6. Prolonged standstill of the
system. Frost protection
Fault Fault description
code
E10
outdoor temperature probe sensor
failure
E20 ntc output sensor failure
E50 domestic hot water ntc sensor failure
E110
safety or flue gas thermostat tripped
E128
Loss of flame during operation (the
ionization current has fallen below
the limit)
E129
Minimum fan speed limit is hurt
E132 floor thermostat tripped
E133 no gas
E151
boiler circuit board error
E153 the reset key has been pressed
inappropriately
E154 internal error on boiler circuit module
E160 fan speed threshold not reached
E164 no hydraulic pressure switch enabling
signal
All the faults are displayed in order of importance; if several faults occur simultaneously, the first to
be displayed is the one with highest priority. After the cause of the first fault has been removed, the
second one will be displayed, and so on.
If any given fault occurs frequently, contact the authorised Service Centre.
Important: Regularly check that the pressure displayed by the pressure gauge is 1 to 1.5 bar, with
boiler not operating.
In case the pressure is lower open the boiler filling tap.
We recommend you open the tap very slowly in order to let off the air.
In case pressure drops occur frequently have the boiler checked by a Qualified Service Engineer.
To shut down the boiler switch off the electrical supply to the appliance.
We recommend you avoid draining the whole system as water replacements engender purposeless
and harmful limestone deposits inside the boiler and on the heating elements.
In case the boiler is not operated during wintertime and is therefore exposed to danger of frost we
suggest you add some specific-purpose anti-freeze to the water contained in the system (e.g.: propy-
lene glycole coupled with corrosion and scaling inhibitors).
The electronic management of boilers includes a 'frost protection' function which operates the bur-
ner to reach a heating flow temperature of 30° C when the system heating flow temperature drops
below 5°C.
The frost protection function is enabled if:
* electrical supply to the boiler is on;
* the gas service cock is open;
* the system pressure is as required;
* the boiler is not blocked.
action required
call the authorised service centre.
call the authorised service centre
call the authorised service centre
press the reset key (for about 2 seconds: if this device is triggered
repeatedly, call the authorised service centre)
Call an authorised service centre.
Call an authorised service centre.
call the authorised service centre
press the reset key (for about 2 seconds); if the fault persists, call the
authorised service centre)
Press the reset button if the display presents the (
switch off the boiler at the mains and switch it on again after 10 seconds.
If the fault persists, call an authorised service centre. Check the position
of the ignition electrodes (chapter 19).
press the key again (about 2 seconds)
Press and hold reset button (2 seconds approx.) then press again when
warning E153 appears
call the authorised service centre.
check that the system is at the rated pressure. (refer to the section on filling
the system). if the fault persists, call the authorised service centre.
70 70
) symbol, otherwise