Troubleshooting - Ferroli DIVA D C24 Instructions For Use, Installation And Maintenence

DIVA D C24

3.4 Troubleshooting

Diagnostics
The boiler has 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 shutdowns (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. At this point the display
will show "d4" for about 30 seconds or "d5" for about 5 minutes which indicates the waiting time after which the boiler
will resume normal operation. if the boiler fails to restart, it is necessary to eliminate the fault.
Other faults cause temporary shutdowns (marked with the letter "F") which are automatically reset as soon as the value
returns within the boiler's normal working range.
List of faults
Table 5
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
EN
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 Check the fume exhaust
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
cod. 3542B920 - Rev 06 - 11/2023
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 neces-
sary
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 and if necessary modify parameter
b03
Check the gas pressure
Check the pressures
Check the wiring
Check the gas valve and replace it if neces-
sary
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring or replace the sensor
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