ERA F 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. 3541O210 - Rev. 01 - 03/2018
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 protection
A03
No water circulation in the sys-
activation
tem
Air in the system
Fume thermostat interven-
Fume thermostat contact open
tion (after intervention of the
Wiring disconnected
fume thermostat, boiler oper-
Flue obstructed or not correctly
ation is prevented for 20 min-
F04
sized
utes)
Jumper of terminals 12-13 not
Wiring fault
connected
Low pressure in the gas system Check the gas pressure
No flame after the ignition
A06
Burner minimum pressure set-
phase
ting
Sensor damaged
F10
Delivery sensor 1 fault
Wiring shorted
Wiring disconnected
Sensor damaged
F14
Delivery sensor 2 fault
Wiring shorted
Wiring disconnected
F34
Supply voltage under 170V Electric mains trouble
F35
Faulty mains frequency
Electric mains trouble
System empty
Incorrect system water pres-
F37
Water pressure switch damaged
sure
or not connected
Probe damaged or wiring
shorted
F39
External probe fault
Probe disconnected after activat-
ing the sliding temperature
Incorrect system water pres-
F40
Pressure too high
sure
Delivery sensor disconnected
A41
Sensor positioning
from the pipe
F42
Heating sensor fault
Sensor damaged
System water pressure sen-
F47
Wiring disconnected
sor 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 oper-
ation 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 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 disa-
ble the sliding temperature
Check the system
Check the safety valve
Check the expansion tank
Check the correct positioning and oper-
ation 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
31
ES