Ferroli DIVATOP D C Instructions For Use, Installation & Maintenance page 62

List of faults
Table 4
Fault
Fault
code
A01 No burner ignition
Flame present signal with burner
A02
off
Overtemperature protection acti-
A03
vation
Fume thermostat intervention.
F04 (Burner re-ignition is inhibited for
20 minutes)
F05-F07 Card parameter fault
A06 No flame after the ignition phase
A09 Gas valve fault
F10 Flow sensor 1 fault
F11 DHW sensor fault
F14 Flow sensor 2 fault
A16 Gas valve fault
F20-A21 Card parameter fault
A23-A24 Card parameter fault
F34 Supply voltage under 180V.
F35 Faulty mains frequency
F37 Incorrect system water pressure
62
Possible cause
No gas
Ignition/detection electrode fault
Faulty gas valve
Gas valve wiring disconnected
Ignition power too low
Electrode fault
Card fault
Heating sensor damaged
No water circulation in the system
Air in the system
Fume thermostat contacts open
Connection broken
Fume duct obstructed or incorrectly
sized
Wrong card parameter setting
Low pressure in the gas system
Burner minimum pressure setting
Wiring disconnected
Faulty gas valve
Sensor damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
Wiring disconnected
Faulty gas valve
Wrong card parameter setting
Wrong card parameter setting
Electric mains trouble
Electric mains trouble
Pressure too low
Water pressure switch damaged or not
connected
cod. 3540000140 - Rev. 02 - 09/2023
DIVATOP D C
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
Check the wiring
Adjust the ignition power
Check the ionization 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
Check the fume exhaust
Check and if necessary modify parameter b03
Check the gas pressure
Check the pressures
Check the wiring
Check the gas valve and replace it if necessary
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring
Check the gas valve and replace it if necessary
Check and if necessary modify parameters
b03 - b04
Check and if necessary modify parameter b05
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
EN