Lamborghini Caloreclima ALHENA TECH H Serie Instrucciones De Uso, Instalación Y Mantenimiento página 344

3.4 Troubleshooting
Diagnostics
LCD display Off
If, even after touching the buttons, the display does not come on, check that the card is electrically
powered. Using a digital multimeter, check for presence of power.
In case of no voltage, check the wiring.
If the voltage is sufficient ( Range 195 – 253 Vac), check the fuse (3.15AL@230VAC). The fuse
is on the card. To access it, see fig. 29.
LCD display On
In case of operation problems or faults, the display shows the fault identification code.
There are faults that cause permanent shutdowns (indicated with the letter "A"): to restore opera-
tion, just hold down the button
ton , or use the RESET of the remote timer control (optional) if installed. If the boiler does not
restart, the fault must be eliminated.
Other faults cause temporary shutdowns (indicated with the letter "F") which are automatically re-
set as soon as the value returns within the boiler's normal working range.
Table of faults
Table 11- List of faults
Fault code Fault
No burner ignition
A01
Flame present signal with
A02
burner off
Fan fault
F05
344
until the message "Confirm?" appears and confirm with the but-
Possible cause
No gas
Ignition/detection elec-
trode fault
Insufficient gas supply
pressure
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
cod. 3541V622 - Rev 00 - 05/2022
ALHENA TECH H
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 ter-
minals.
Do the Calibration procedure [AUTO
SETUP].
Check the gas valve and replace it if
necessary
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 neces-
sary
EN