Climit 24 OF, Installation And Servicing Instruction, Page: 57 / 116

57
IT EN
Type No. Fault Solution
AL 10 Auxiliary sensor fault
- Check the hydraulic
configuration using "tS 0.2"
- Check the electrical connection
AL 11 Gas valve modulator
disconnected
- Check the electrical connection
AL 12
Domestic hot water
sensor fault in tank
mode
- Set the parameter tS 0.4
(Combustion configuration) to 0
AL 13 Smoke probe
intervention
- Check the sensor is working
- Replace the smoke probe
AL 14 Smoke probe fault
- Replace the smoke probe
- Check the electrical connection
of the smoke probe
- Contact the Technical Assistance
Centre
AL 15 Fan check cable
disconnected
- Check the connection cable
between the fan and the board
AL 18 Condensate level fault
- Check for any clogging in the
pipe which takes the condensate
to the siphon
- Check that the siphon is not
clogged
AL 28
Maximum number of
consecutive resets
reached
- Wait 1 hour and try unblocking
the board again
- Contact the Technical Assistance
Centre
AL 30
Return sensor fault
(boiler sensor fault for
T models)
- Replace the return probe
- Check parameters
- Contact the Technical Assistance
Centre
AL 37 Fault due to low
network voltage
- Check the voltage
- Contact your network provider
AL 40 Incorrect network
frequency detected
- Contact your network provider
AL 41
Flame loss more
than 6 consecutive
times
- Check the ignition/detection
electrode
- Check the gas supply (open
valve)
- Check mains gas pressure
AL 42 Button fault
- Check that buttons are
working
AL 43 Open Therm
communication fault
- Check the OT electric
connection
AL 44
No flame valve
opening time sum
anomaly
- 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
AL 56
Lock for
∆T
delivery/
return over max limit
(open vent)
- Contact the Technical
Assistance Centre
AL 57
Lock for flow
temperature (FT)
check (open vent)
- Contact the Technical
Assistance Centre
AL 62
Self-calibrating
procedure is
required
- Carry out the self-calibrating
procedure (see the specific
section)
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
Type No. Fault Solution
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
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
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.