Troubleshooting; List Of Faults - Ferroli DOMIcondens F 24 D Instrucciones De Uso, Instalación Y Mantenimiento

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 11 - fig. 1) indicating the fault
code.
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 op-
tional remote timer control if installed; if the boiler fails to start, it is necessary to 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. 5
Fault
Fault Possible cause
code
Excessive condensate level
No gas
Ignition/detection electrode fault
A01 No burner ignition
Faulty gas valve
Gas valve wiring disconnected
Ignition power too low
Electrode fault
Flame present signal with
A02
burner off
Card fault
Heating sensor damaged
Overtemperature protec-
A03
tion activation No water circulation in the system Check the circulating pump
Air in the system
Exchangers dirty (clogged on
water side)
Anomalous water circulation
F04 Fume thermostat fault
Fume thermostat contact open
Wiring disconnected
Card parameter fault Wrong card parameter setting
Wiring disconnected
F05
Fan fault Faulty fan
Card fault
Low pressure in the gas system
No flame after the ignition
A06
phase
Burner minimum pressure setting Check the pressures
F07 Card parameter fault Wrong card parameter setting
Wiring disconnected
A09 Gas valve fault
Faulty gas valve
Sensor damaged
F10 Delivery sensor 1 fault Wiring shorted
Wiring disconnected
Sensor damaged
F11 DHW sensor fault Wiring shorted
Wiring disconnected
Sensor damaged
F14 Delivery sensor 2 fault Wiring shorted
Wiring disconnected
Wiring disconnected
A16 Gas valve fault
Faulty gas valve
Fan fault
Faulty baffle
F20 Combustion control fault
Flue obstructed or not correctly
sized
Fault F20 generated 6 times in the
A21 Poor combustion fault
last 10 minutes
A23 Card parameter fault Wrong card parameter setting
A24 Card parameter fault Wrong card parameter setting
F34 Supply voltage under 180V. Electric mains trouble
F35 Faulty mains frequency Electric mains trouble
36
EN
DOMIcondens F 24 D - F 28 D
All manuals and user guides at all-guides.com
Fault
code
F37
F39
A41
F42
F43
Cure
F50
Empty / clean the trap
Check the regular gas flow to the
A51
boiler and that the air has been elimi-
nated 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
Check the wiring
Adjust the ignition power
Check the ionisation electrode wiring
Check the card
Check the correct positioning and
operation of the heating sensor
Vent the system
Clean the exchangers
Check the thermostat
Check the wiring
Check the card parameter and modify
it if necessary
Check the wiring
Check the fan
Check the card
Check the gas pressure
Check the card parameter and modify
it if necessary
Check the wiring
Check the gas valve and replace it if
necessary
Check the wiring or replace the sen-
sor
Check the wiring or replace the sen-
sor
Check the wiring or replace the sen-
sor
Check the wiring
Check the gas valve and replace it if
necessary
Check the fan and fan wiring
Check the baffle and replace it if nec-
essary
Check the flue
See fault F20
Check the card parameter and modify
it if necessary
Check the card parameter and modify
it if necessary
Check the electrical system
Check the electrical system
cod. 3541C751 - Rev. 00 - 10/2013
Fault Possible cause
Pressure too low
Incorrect system water
Water pressure switch damaged
pressure
or not connected
Probe damaged or wiring shorted
External probe fault
Probe disconnected after activat-
ing the sliding temperature
Delivery sensor or DHW sensor
Sensor positioning
detached from the pipe
Heating sensor fault Sensor damaged
No system H O circulation
Exchanger protection acti-
2
vation.
Air in the system
Modulating Operator wiring dis-
connected
Gas valve fault
Faulty gas valve
Poor combustion fault Inlet/exhaust flue obstruction
Cure
Fill the system
Check the sensor
Check the wiring or replace the sen-
sor
Reconnect the external probe or disa-
ble the sliding temperature
Check the correct positioning and
operation of the sensors
Replace the sensor
Check the circulating pump
Vent the system
Check the wiring
Check the gas valve and replace it if
necessary
Check the flue