91
EN
Type
No. Fault
Solution
AL
72 Incorrect positioning of
the delivery sensor
- Check delivery sensor
operation and position
AL
74 Second delivery sensor
fault
- Check second delivery
sensor operation and
position
AL
77 EV2 SGV current max/min
absolute limits error
- Check gas valve and
board
AL
78 EV2 SGV current upper
limit error
- Check gas valve and
board
AL
79 EV2 SGV current lower
limit error
- Check gas valve and
board
AL
80
Fault on the valve control
logic line/valve cable
damaged
- Check gas valve and
board
AL
81 Block due combustion
during start-up
- Check for blockage in
chimney
- Check air diaphragm
(for BF models)
- Check gas calibration
- Bleed the air from the
gas circuit
AL
82
Block due to numerous
combustion control
failures
- Check electrode
- Check outlets
- Check air diaphragm
(for BF models)
- Check gas calibration
AL
83 Irregular combustion
(temporary error)
- Check for blockage in
chimney
- Check air diaphragm
(for BF models)
- Check gas calibration
AL
84
Flow rate reduced for
(presumed) low pressure
on mains gas
- Check gas flow rate
AL
88 Internal error (board
component protection)
- Check the board is
working
- Replace board
AL
89 Unstable combustion
feedback signal error
- Check electrode
- Check outlets
- Check air diaphragm
(for BF models)
- Check gas calibration
AL
90 Combustion set cannot be
reached error
- Check electrode
- Check outlets
- Check air diaphragm
(for BF models)
- Check gas calibration
ALL
91 Gas valve out of range
- Recalibrate the gas
valve
AL
92
System has reached
maximum air correction
error (at the minimum
flow rate)
- Check electrode
- Check outlets
- Check air diaphragm
(for BF models)
- Check gas calibration
Type
No. Fault
Solution
AL
93 Combustion set cannot be
reached error
- Check electrode
- Check outlets
- Check air diaphragm
(for BF models)
- Check gas calibration
AL
95 Flame signal micro
interruptions error
- Check electrode
- Check board
- Check electric power
supply
- Check gas calibration
AL
96 Block due to clogging in
smoke outlet
- Check for blockage in
chimney
- Check the smoke outlet
and electrode position
(not touching the
burner)
AL
98 SW error, board start-up
- Contact the Technical
Assistance Centre
AL
99 General board error
- Contact the Technical
Assistance Centre
-
-
Frequent relief valve
intervention
- Check circuit pressure
- Check expansion vessel
-
-
Limited production of
domestic hot water
- Check the diverter valve
- Check that plate heat
exchanger is clean
- Check domestic hot
water circuit valve
4.6.1
Maintenance request
When it is time to perform maintenance on the boiler,
"SE"
shows on the display.
Contact the technical assistance service to organise the
necessary work.
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