Lamborghini Caloreclima NINFA N LOW NOX 24 MCS, Instructions For Use, Installation And Maintenance

Page: 79 / 144

NINFA N LOW NOX 24 MCS
79 EN
cod. 3540R880 - 01/2009 (Rev. 00)
3.4 Troubleshooting
Diagnostics
In case of operating problems or trouble, the display flashes and the fault identification code appears.
There are faults that cause permanent shutdown (marked with the letter “ A ”): to restore operation, press the RESET
button (detail 6 - fig. 1) for 1 second or RESET on the optional remote timer control if installed; if the boiler fails to start,
it is necessary to first eliminate the fault.
Faults marked with the letter “ F ” cause temporary shutdowns that are automatically reset as soon as the value returns
within the boiler's normal working range.
List of faults
Table. 2 - Fault list
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 cor-
rectly positioned and free of any deposits
Faulty gas valve Check and if necessary replace the gas valve
Ignition power too low Adjust the ignition power
A02
Flame present signal with
burner off
Electrode fault Check the ionisation electrode wiring
Card fault Check the card
A03
Overtemperature protection
activated
Heating sensor damaged
Check the correct positioning and operation of the
heating sensor
No water circulation in the sys-
tem
Check the circulating pump
Air in the system Vent the system
F05
Air pressure switch (fails to
close contacts within 20 sec.
of fan activation)
Air pressure switch contact open Check the wiring
Faulty air pressure switch wiring Check the fan
Faulty baffle Check the pressure switch
Flue not correctly sized or
obstructed
Replace the baffle
A06
No flame after the ignition
stage
Low pressure in the gas system Check the gas pressure
Burner minimum pressure set-
ting Check the pressures
F10 Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sensor Wiring shorted
Wiring disconnected
F11 DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor Wiring shorted
Wiring disconnected
F14 Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the sensor Wiring shorted
Wiring disconnected
F34 Supply voltage under 170V. Power supply trouble Check the electrical system
F35 Mains frequency anomaly Power supply trouble Check the electrical system
F37
Incorrect system water pres-
sure
Pressure too low Fill the system
Sensor damaged Check the sensor
F39 External probe fault
Probe damaged or wiring
shorted
Check the wiring or replace the sensor
Probe disconnected after acti-
vating the sliding temperature Reconnect the external probe or disable the sliding
temperature