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Boiler faults list
ERROR
CODE
E010
flame lockout/ACF electronic fault
E011
E020
water high limit/heat exchanger thermostat
E030
E040
low water cutoff - check system water pressure
low water cutoff - check system water pressure
E041
low water pressure fault
E042
E044
domestic hot water sensor fault (combi model) /
E060
indirect tank sensor fault (heating only model)
E070
high limit supply sensor
supply/return sensor differential error
E077
E080
return line sensor high limit
supply/return line sensor differential error
E090
flue gases high limit sensor
E091
clean primary heat exchanger
E099
reset attempts exhausted, boiler blocked
WAIT
wait communication from the boiler board
COMM.
COMM.
lost communication from the boiler board
LOST
_CL_
Time to SERVICE overdue
List of combustion faults
ERROR
ERROR
CODE
CODE DESCRIPTION
E021
iono error
E022
iono error
E023
iono error
E024
iono error
E067
iono error
E088
iono error
E097
iono error
E085
ACC monitor error
E094
ACC monitor error
E095
ACC monitor error
E058
supply voltage fault
E065
current modulation error
E086
obstruction fumes error
Definitive= boiler BLOCK, manual reset needed
Transitional= the boiler automatically restores the alarm without any external intervention
Notification = the boiler does not stop, this is just a signalling message
Fault E020
This kind of fault has two potential causes:
1) Water high limit thermostat intervention: due to absence or poor
water in the circuit or absence of circulation; check pressure value
on the pressure gauge and if necessary restore it (14 - 22 psi (1 and
1.5 bar)) and check the correct working of the circulator.
2) Heat Exchanger Thermostat intervention: due to presence of
excessive dirt/deposits inside the primary heat exchanger. This
condition could lead to frequent faults E020. Once established that
condition 1 is satisfied, it is necessary to clean the heat exchanger
ERROR MESSAGE
parasitic flame
fan fault
low water cutoff fault
high water fault
supply sensor fault
external error contact
fault return line sensor
fault flue gases sensor
RED
GREEN
LED
LED
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
RED
GREEN
LED
LED
ON
flashing 0.2 sec
on/0.2 sec off
flashing 0.5 sec
on/0.5 sec off
ON
flashing 0.5 sec
on/0.5 sec off
flashing 0.5 sec
on/0.5 sec off
flashing 0.5 sec
on/0.5 sec off
ON
ON
ON
It is referred to the last fault occured
ON
DESCRIPTION OF TYPE OF ALARM
These are temporary errors that if they occur several imes in an hour they
become a hard lock-out; the alarm E097 is displayed and is followed by post-
purging for 45 seconds at the fan's maximum speed.
It is not possible to release the error before the end of the post-purging unless
the boiler's power supply is switched off.
9
WARNING: first action verify the condensate check valve and if the
condensate trap drains correctly - see section 7.4
These are temporary errors that if they occur several times an hour they become
a hard lock-out; the last error to occur is displayed and is followed by a post-
purging of 5 minutes at the fan's maximum speed. It is not possible to release
the error before the end of the post-purging unless the boiler's power supply is
switched off.
These are temporary faults that restrict the ignition cycle.
Temporary fault reported during the post ventilation. It is maintained a post
ventilation of 5 min at maximum fan speed.
- see "12.4 Maintenance of the combustion control system" page
56.
Press the "ENTER" button with the rules described below.
9
WARNING - If the attempts to reset the boiler are unsuccessful,
please contact the technical service.
53
RED and
DESCRIPTION OF
GREEN
TYPE OF ALARM
definitive
transitional
definitive
definitive
ON
definitive
transitional
transitional
ON
definitive
transitional
flashing 0.5 sec
transitional
on/0.5 sec off
transitional
definitive
definitive
transitional
transitional
definitive
definitive
flashing 0.5 sec
transitional
on/0.5 sec off
definitive
flashing 0.5 sec
notification
on/0.5 sec off
definitive,
not resettable
transitional
transitional
flashing 0.1 sec
notification
on/0.1 sec off
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