11
91.7.1 - GB/IE
InstructIons pErtaInInG to thE usEr
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.
Fault description
Outdoor temperature sensor failure
NTC output sensor failure
Hot water NTC sensor failure
Safety or flue gas thermostat tripped
Loss of flame during operation (the
ionization current has fallen below
the limit)
Minimum fan speed limit is not met
lack of gas pressure / external
thermostat
No gas
Boiler circuit board error
The reset key has been pressed
inappropriately
Internal error on boiler circuit module
Fan speed threshold not reached
No hydraulic differential pressure
switch enabling signal
Fault
code
E10
E20
E50
E110
E128
E129
E132
E133
E151
E153
E154
E160
E164
3.9 fault Warnings table
Action required
Call the authorised service centre to check the wiring and/or replace the sensor.
Call the authorised service centre to replace the sensor.
Call the authorised service centre to replace the sensor.
Press the reset key (for about 2 seconds: if this device is triggered repeatedly, call
the authorised service centre)
Call
the authorised service centre to check the flame.
Call the authorised service centre.
Call the gas supplier.
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 (
) symbol, otherwise 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 (section 18).
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 to check the fan.
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.