BlueHelix ALPHA C
305
EN
cod. 3541U152 - Rev. 01 - 04/2021
LCD display On
In case of operation problems or faults, the display flashes and the fault identification code appe-
ars
There are faults that cause permanent shutdown (indicated with the letter “
A
”): to restore opera-
tion just press the
reset
button (detail 6 - fig. 1) for 1 second or use the RESET on the remote
timer control (optional) if installed; if the boiler does not restart, it is necessary to eliminate the fault
first.
Other faults cause temporary shutdowns (marked with the letter “
F
”) which are automatically reset
as soon as the value returns within the boiler's normal working range.
Table of faults
Table 11- List of faults
Fault code
Fault
Possible cause
Cure
A01
No burner ignition
No gas
Check the regular gas flow to the boiler and that
the air has been eliminated from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode and that it is
correctly positioned and free of any deposits;
replace the electrode if necessary.
Insufficient gas supply pressure
Check the gas supply pressure
Trap blocked
Check the trap and clean it if necessary
Air/fume ducts obstructed
Remove the obstruction from the flue, fume extrac-
tion ducts, air inlet and terminals.
Wrong calibration
Do complete manual calibration.
Faulty gas valve
Check and replace the gas valve if necessary
A02
Flame present signal with burner
off
Electrode fault
Check the ionization electrode wiring
Check the condition of the electrode
Electrode to ground
Cable to ground
Check the trap and clean it if necessary
Card fault
Check the card
F05
Fan fault
No 230V power supply
Check the 5-pin connector wiring
Tachometric signal interrupted
Fan damaged
Check the fan and replace it if necessary
A06
No flame after the ignition phase
Ionization electrode fault
Check the position of the ionization electrode, free
it from any deposits and do a complete manual
calibration, if necessary replace the electrode.
Flame unstable
Check the burner
air/fume ducts obstructed
Remove the obstruction from the flue, fume extrac-
tion ducts, air inlet and terminals
Trap blocked
Check the trap and clean it if necessary
Wrong calibration
Do complete manual calibration.
F15 - A07
High fume temperature
The fume probe detects an
excessive temperature
Check the exchanger
Check the flue gas probe
Check the flue material parameter
A08
Overtemperature protection
intervention
Sensor not correctly positioned
on flow pipe or damaged
Check the correct positioning and operation of the
heating sensor and replace it if necessary
No water circulation in the system Check the circulating pump
Air in the system
Vent the system
