ALHENA TECH C
Table of faults
Table 11- List of faults
Fault code Fault
No burner ignition
A01
Flame present signal with burner off
A02
Fan fault
F05
No flame after the ignition phase
A06
Overtemperature protection interven-
A08
tion
Exchanger protection intervention
A09
Possible cause
No gas
Ignition/detection electrode
fault
Insufficient gas supply pres-
sure
Trap blocked
Air/fume ducts obstructed
Wrong calibration
Faulty gas valve
Electrode fault
Card fault
No 230V power supply
Tachometric signal inter-
rupted
Fan damaged
Ionization electrode fault
Flame unstable
air/fume ducts obstructed
Trap blocked
Wrong calibration
Insufficient gas supply pres-
sure
Flow or return sensors incor-
rectly positioned or damaged
No water circulation in the
system
Air in the system
No water circulation in the
system
Poor circulation and anoma-
lous flow probe temperature
increase
blocked exchanger
cod. 3541V512 - Rev 00 - 07/2022
Cure
Check the regular gas flow to the boiler and
that the air has been eliminated from the
pipes
Check the wiring of the electrode and that it is
correctly positioned and free of any deposits;
replace the electrode if necessary.
Check the gas supply pressure
Check the trap and clean it if necessary
Remove the obstruction from the flue, fume
extraction ducts, air inlet and terminals.
Do the Calibration procedure [
Check the gas valve and replace it if neces-
sary
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
Check the card
Check the 5-pin connector wiring
Check the fan and replace it if necessary
Check the position of the ionization electrode,
free it from any encrustations and do the Cali-
bration procedure [
AUTO SETUP
electrode if necessary.
Check the burner
Remove the obstruction from the flue, fume
extraction ducts, air inlet and terminals
Check the trap and clean it if necessary
Do the Calibration procedure [
Check the gas supply pressure
Check the correct positioning and operation of
the sensors and replace them if necessary.
Check the circulating pump
Vent the system
Check the circulating pump and heating sys-
tem
Vent the system
check the exchanger and system
EN
].
AUTO SETUP
]. Replace the
].
AUTO SETUP
331