Baxi Luna HT Installers And Users Instructions page 9

Fault warnings appear on the secondary display (figure 1 b) alternating with the time, both of them
flashing (figure 4.1). It is not possible to reset malfunction warnings which appear on the secondary
display as the cause of the alarm has first to be removed.
Figure 4.1
3.9 Fault warnings table
Fault Fault description
code
10 outdoor temperature probe sensor failure
20 ntc output sensor failure
50 domestic hot water ntc sensor failure
110 safety or flue gas thermostat tripped
132 floor thermostat tripped
133 no gas
135 fan electricity supply failure
151 boiler circuit board error
153 the reset key has been pressed
inappropriately
154 internal error on boiler circuit module
160 fan speed threshold not reached
164 no hydraulic differential pressure
switch enabling signal
183 saving parameters
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.
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 the authorised service centre
press the reset key (for about 2 seconds); if the fault persists, call the
authorised service centre)
call the authorised service centre
switch off the electricity supply to the boiler for 10 seconds; if the
fault persists, call the authorised service centre)
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.
If the warning is displayed for more than 3 seconds, press and hold the
reset button (2 seconds approx.) then press again when the warning
E153 appears
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