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Type
No.
Fault
AL
10
Auxiliary sensor fault
Gas valve modulator
AL
11
disconnected
Domestic hot water
AL
12
sensor fault in tank
mode
Smoke probe
AL
13
intervention
AL
14
Smoke probe fault
Fan check cable
AL
15
disconnected
AL
18
Condensate level fault
Maximum number of
AL
28
consecutive resets
reached
Return sensor fault
AL
30
(boiler sensor fault for
T models)
Fault due to low
AL
37
network voltage
Incorrect network
AL
40
frequency detected
Flame loss more
AL
41
than 6 consecutive
times
AL
42
Button fault
Open Therm
AL
43
communication fault
No flame valve
AL
44
opening time sum
anomaly
Lock for ∆T delivery/
AL
56
return over max limit
(open vent)
Lock for flow
AL
57
temperature (FT)
check (open vent)
Self-calibrating
AL
62
procedure is
required
Incorrect positioning
AL
72
of the delivery
sensor
Second delivery
AL
74
sensor fault
EV2 SGV current
AL
77
max/min absolute
limits error
EV2 SGV current
AL
78
upper limit error
EV2 SGV current
AL
79
lower limit error
Fault on the valve
AL
80
control logic line/
valve cable damaged
Block due
AL
81
combustion during
start-up
Solution
- Check the hydraulic
configuration using "tS 0.2"
- Check the electrical connection
- Check the electrical connection
- Set the parameter tS 0.4
(Combustion configuration) to 0
- Check the sensor is working
- Replace the smoke probe
- Replace the smoke probe
- Check the electrical connection
of the smoke probe
- Contact the Technical Assistance
Centre
- Check the connection cable
between the fan and the board
- Check for any clogging in the
pipe which takes the condensate
to the siphon
- Check that the siphon is not
clogged
- Wait 1 hour and try unblocking
the board again
- Contact the Technical Assistance
Centre
- Replace the return probe
- Check parameters
- Contact the Technical Assistance
Centre
- Check the voltage
- Contact your network provider
- Contact your network provider
- Check the ignition/detection
electrode
- Check the gas supply (open
valve)
- Check mains gas pressure
- Check that buttons are
working
- Check the OT electric
connection
- Check for the presence of
water hammer on the hot
water system and, if present,
mount a water hammer
arrestor
- Check for any abnormal
requests on the room
thermostat
- Contact the Technical
Assistance Centre
- Contact the Technical
Assistance Centre
- Contact the Technical
Assistance Centre
- Carry out the self-calibrating
procedure (see the specific
section)
- Check delivery sensor
operation and position
- Check second delivery sensor
operation and position
- Check gas valve and board
- Check gas valve and board
- Check gas valve and board
- Check gas valve and board
- Check for blockage in chimney
- Check air diaphragm (for BF
models)
- Check gas calibration
- Bleed the air from the gas
circuit
Type
No.
Fault
Block due to
numerous
AL
82
combustion control
failures
Irregular combustion
AL
83
(temporary error)
Flow rate reduced
for (presumed) low
AL
84
pressure on mains
gas
Internal error
AL
88
(board component
protection)
Unstable combustion
AL
89
feedback signal
error
Combustion set
AL
90
cannot be reached
error
System has reached
maximum air
AL
92
correction error (at
the minimum flow
rate)
Combustion set
AL
93
cannot be reached
error
Flame signal micro
AL
95
interruptions error
Block due to
AL
96
clogging in smoke
outlet
SW error, board
AL
98
start-up
AL
99
General board error
Frequent relief valve
-
-
intervention
Limited production
-
-
of domestic hot
water
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.
Solution
- Check electrode
- Check outlets
- Check air diaphragm (for BF
models)
- Check gas calibration
- Check for blockage in chimney
- Check air diaphragm (for BF
models)
- Check gas calibration
- Check gas flow rate
- Check the board is working
- Replace board
- Check electrode
- Check outlets
- Check air diaphragm (for BF
models)
- Check gas calibration
- Check electrode
- Check outlets
- Check air diaphragm (for BF
models)
- Check gas calibration
- Check electrode
- Check outlets
- Check air diaphragm (for BF
models)
- Check gas calibration
- Check electrode
- Check outlets
- Check air diaphragm (for BF
models)
- Check gas calibration
- Check electrode
- Check board
- Check electric power supply
- Check gas calibration
- Check for blockage in chimney
- Check the smoke outlet
and electrode position (not
touching the burner)
- Contact the Technical
Assistance Centre
- Contact the Technical
Assistance Centre
- Check circuit pressure
- Check expansion vessel
- Check the diverter valve
- Check that plate heat
exchanger is clean
- Check domestic hot water
circuit valve
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