BlueHelix ALPHA C
306
EN
cod. 3541U152 - Rev. 01 - 04/2021
A09
Exchanger protection activation
No water circulation in the system
Check the circulating pump and the heating sys-
tem
Poor circulation and anomalous
flow probe temperature increase
Vent the system
blocked exchanger
check the exchanger and system
F09
Overtemperature protection
intervention
Flow sensor damaged
Check correct positioning and operation of the flow
sensor and replace it if necessary
No water circulation in the system
Check the circulating pump and the heating sys-
tem
Air in the system
Vent the system
F10
Flow sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F11
Return sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F12
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F13
Fume probe fault
Probe damaged
Check the wiring or replace the fume probe
Wiring shorted
Wiring disconnected
A14
Fume extraction duct safety
device intervention
Fault A07 generated 3 times in
the last 24 hours
See fault A07
F34
Supply voltage under 180V
Electric mains trouble
Check the electrical system
F35
Wrong supply frequency
Electric mains trouble
Check the electrical system
A23-A24-A26-F20
F21-F40-F47-F51
Water pressure switch fault
Wrongly configured parameter
Check if parameter
b04
is configured correctly
(default 0=pressure switch)
System pressure problems
(transducer)
System pressure value outside set limits (transdu-
cer)
b06
set to 3
F37
Incorrect system water pressure
Pressure too low
Fill the system
Water pressure switch damaged
or disconnected
Check the water pressure switch
F39
External probe fault
Probe damaged or wiring shorted Check the wiring or replace the sensor
Probe disconnected after activa-
ting the sliding temperature
Reconnect the external probe or disable the sliding
temperature
F19
Card parameter fault
Wrong card parameter setting
Check and if necessary modify parameter b15 to 3
F50 - F53
Limit thermostat fault with para-
meter b06 = 1 or 4
No/poor water circulation in the
system
Check the circulating pump and the heating sys-
tem
Air in the system
Vent the system
Incorrect parameter
Check the correct parameter setting
A64
Maximum number of consecu-
tive Resets exceeded
Maximum number of consecutive
Resets exceeded
Disconnect the power supply to the boiler for
60
seconds
and then reinstate the boiler
F62
Calibration required
New card or boiler not yet calibra-
ted
Do
complete manual calibration
A88
Specific combustion control
errors or gas valve
Calibration activation with burner
lit.
Combustion problem, gas valve
failure or electronic board
Reset the fault and do
complete manual calibra-
tion
.
If necessary, replace the gas valve or electronic
board.
Fault code
Fault
Possible cause
Cure
