9
For fault E041
If the pressure drops below the safety threshold of 0.3 bar the
boiler displays the fault code “E041 - WATER TRANSDUCER
LOAD THE SYSTEM” for a transitional time of 30 sec during
which it is possible to open the external filling tap until the
pressure is between 1 and 1.5 bar.
E041
WATER TRANSDUCER
LOAD THE SYSTEM
b
If the pressure drops frequently, contact the Technical
Assistance Centre.
For fault E091
The boiler has an auto-diagnostic system which, based on
the total number of hours in certain operating conditions, can
signal the need to clean the primary heat exchanger. The
intervention of the Technical Assistance Centre is necessary.
Boiler faults list
ERROR
CODE
ERROR MESSAGE
DESCRIPTION OF
ALARM TYPE
E010
flame lockout/ACF electronic fault
final
E011
extraneous flame
temporary
E020
limit thermostat
final
E030
fan fault
final
E040
water transducer - check system water pressure
final
E041
water transducer - check system water pressure
temporary
E042
water transducer fault
final
E060
configuration fault
temporary
E070
fault flow sensor/overtemperature flow sensor/
flow/return sensor differential alarm
temporary/final/
final
E077
main zone water thermostat
temporary
E080
fault return line probe/return line probe overtemperature/
outlet/return line probe differential alarm
temporary/
final
/
final
E090
fault flue gases probe/
flue gases overtemperature probe
temporary
final
E091
clean primary heat exchanger
temporary
E099
reset attempts exhausted, boiler blocked
definitive, not resettable
--
water pressure low - check the system
temporary
--
water pressure high - check the system
temporary
--
boiler board communication lost
temporary
--
BUS 485 communication lost
temporary
List of combustion faults
ERROR
CODE
ERROR MESSAGE
DESCRIPTION OF TYPE OF ALARM
E021
iono alarm
These are temporary alarms that if they occur several times in an hour they become definitive;
the alarm E097 is displayed and is followed by post-purging for 45 seconds at the fan’s maximum
speed.
It is always possible to release the alarm before the end of the post-purging.
E022
iono alarm
E023
iono alarm
E024
iono alarm
E067
iono alarm
E088
iono alarm
E097
iono alarm
E085
combustion fault/high CO
These are temporary alarms that if they occur several times
in an hour they become definitive; the
last error to occur is displayed and is followed by a post-purging of 2 minutes at the fan’s maximum
speed.
It is not possible to release the alarm before the end of the post-purging unless the boiler’s power
supply is switched off.
E094
combustion fault/high CO
E095
combustion fault/high CO
E058
mains voltage fault
These are temporary faults that restrict the ignition cycle.
E065
current modulation alarm
E086
obstruction fumes alarm
Temporary fault reported during the post ventilation. It is maintained a post ventilation of 5 min at
maximum fan speed.
