53
Boiler faults list
ERROR
CODE
ERROR MESSAGE
RED
LED
GREEN
LED
RED and
GREEN
DESCRIPTION OF
TYPE OF ALARM
E010
flame lockout/ACF electronic fault
ON
definitive
E011
parasitic flame
flashing 0.2 sec
on/0.2 sec off
transitional
E020
water high limit/heat exchanger thermostat
flashing 0.5 sec
on/0.5 sec off
definitive
E030
fan fault
ON
definitive
E040
low water cutoff - check system water pressure
ON
definitive
E041
low water cutoff - check system water pressure
flashing 0.5 sec
on/0.5 sec off
transitional
low water pressure fault
flashing 0.5 sec
on/0.5 sec off
transitional
E042
low water cutoff fault
ON
definitive
E044
high water fault
flashing 0.5 sec
on/0.5 sec off
transitional
E060
domestic hot water sensor fault (combi model) /
indirect tank sensor fault (heating only model)
flashing 0.5 sec
on/0.5 sec off
transitional
E070
supply sensor fault
high limit supply sensor
supply/return sensor differential error
ON
transitional
definitive
definitive
E077
external error contact
ON
transitional
E080
fault return line sensor
return line sensor high limit
supply/return line sensor differential error
ON
transitional
definitive
definitive
E090
fault flue gases sensor
flue gases high limit sensor
flashing 0.5 sec
on/0.5 sec off
transitional
definitive
E091
clean primary heat exchanger
flashing 0.5 sec
on/0.5 sec off
notification
E099
reset attempts exhausted, boiler blocked
It is referred to the last fault occured
definitive,
not resettable
WAIT
COMM
.
wait communication from the boiler board
transitional
COMM.
LOST
lost communication from the boiler board
ON
transitional
_CL_
Time to SERVICE overdue
flashing 0.1 sec
on/0.1 sec off
notification
List of combustion faults
ERROR
CODE
ERROR
CODE DESCRIPTION
RED
LED
GREEN
LED
DESCRIPTION OF TYPE OF ALARM
E021
iono error
ON
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
E022
iono error
ON
E023
iono error
ON
E024
iono error
ON
E067
iono error
ON
E088
iono error
ON
E097
iono error
ON
E085
ACC monitor error
ON
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.
E094
ACC monitor error
ON
E095
ACC monitor error
ON
E058
supply voltage fault
ON
These are temporary faults that restrict the ignition cycle.
E065
current modulation error
ON
E086
obstruction fumes error
ON
Temporary fault reported during the post ventilation. It is maintained a post
ventilation of 5 min at maximum fan speed.
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
- 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 servi
ce.
