Ferroli PEGASUS D 23 Instructions D'utilisation, D'installation Et D'entretien page 33

PEGASUS D
Pilot burner assembly
3
5
8
fig. 21 - Pilot burner
1 Combustion chamber door
2 Inspection door
3 Pilot burner
4 Ignition electrode
5 Detection electrode
6 Pilot nozzle
7 High voltage cable
8 Gas supply pipe
3 ÷ 4 mm
4
cod. 3540U174 - Rev. 04 - 11/2018
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault, the
display will flash together with the fault symbol (detail 22 - fig. 1) indicating the fault code.
There are faults that cause permanent shutdowns (marked with the letter "A"): to restore
operation, press the RESET button (detail 8 - 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 firstly eliminate the fault.
Other faults cause temporary shutdowns (marked with the letter "F") which are automat-
ically reset as soon as the value returns within the boiler's normal working range.
Table. 2 - List of faults
Fault
Fault Possible cause
code
No gas
Ignition/detection electrode
fault
A01 No burner ignition
Faulty gas valve
Ignition power too low
Electrode fault
Flame present signal with
A02
burner off
Card fault
Heating sensor damaged
Overtemperature
A03 No water circulation in the
protection activation
system
Air in the system
Fume thermostat contact
Fume thermostat inter-
open
vention (after intervention
of the fume thermostat, Wiring disconnected
boiler operation is pre-
F04
Flue obstructed or not
vented for 20 minutes)
correctly sized
Jumper of terminals 12-13
Wiring fault
not connected
Low pressure in the gas
system
No flame after the
A06
ignition phase
Burner minimum pressure
setting
Sensor damaged
F10 Delivery sensor 1 fault Wiring shorted
Wiring disconnected
Sensor damaged
F14 Delivery sensor 2 fault Wiring shorted
Wiring disconnected
Supply voltage under
F34 Electric mains trouble
170V
F35 Faulty mains frequency Electric mains trouble
System empty
Incorrect system water
F37
Water pressure switch dam-
pressure
aged or not connected
Probe damaged or wiring
shorted
F39 External probe fault
Probe disconnected after
activating the sliding
temperature
Incorrect system water
F40 Pressure too high
pressure
Delivery sensor
A41 Sensor positioning
disconnected from the pipe
F42 Heating sensor fault Sensor damaged
System water pressure
F47 Wiring disconnected
sensor fault
Gas valve wiring fault
A48 Gas valve fault Faulty gas valve
Card fault
Gas valve wiring fault
A49 Gas valve fault Faulty gas valve
Card fault
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
Check the gas valve and replace it if
necessary
Adjust the ignition power
Check the ionisation electrode wiring
Check the card
Check the correct positioning and operation of
the heating sensor
Check the circulating pump
Vent the system
Check the thermostat
Check the wiring
Change the flue
Check the wiring
Check the gas pressure
Check the pressures
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the wiring or replace the sensor
Reconnect the external sensor or disable the
sliding temperature
Check the system
Check the safety valve
Check the expansion tank
Check the correct positioning and operation of
the heating sensor
Replace the sensor
Check the wiring
Check the wiring
Replace the gas valve
Replace the card
Check the wiring
Replace the gas valve
Replace the card
EN
33