Troubleshooting Diagnostics; List Of Faults - Ferroli DIVAtech D F24 Instructions For Use, Installation And Maintenance

4.4 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 op-
tional 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 automat-
ically reset as soon as the value returns within the boiler's normal working range.

List of faults

Table. 9
Code
Fault Possible cause
fault
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 protection
A03 No water circulation in the sys-
activation
tem
Air in the system
F04 Card parameter fault Wrong card parameter setting
Card parameter fault Wrong card parameter setting
Wiring disconnected
F05
Fan fault Defective fan
Card fault
Low pressure in the gas system Check the gas pressure
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 not correctly sized or
obstructed
Fault F20 generated 6 times in
A21 Poor combustion fault
the 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
Pressure too low
Incorrect system water pres-
F37
Water pressure switch damaged
sure
or not connected
10
EN
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 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 card parameter and modify
it if necessary
Check the card parameter and modify
it if necessary
Check the wiring
Check the fan
Check the card
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 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 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
Fill the system
Check the sensor
cod. 3541P560 - Rev. 00 - 06/2018
Code
Fault Possible cause
fault
Probe damaged or wiring shorted Check the wiring or replace the sensor
F39 External probe fault
Probe disconnected after activat-
ing the sliding temperature
Delivery sensor or DHW sensor
A41 Sensor positioning
detached from the pipe
F42 Heating sensor fault Sensor damaged
No H O system circulation
2
F43 Exchanger protection trips.
Air in the system
Modulating Operator wiring dis-
connected
F50 Gas valve fault
Faulty gas valve
A51 Poor combustion fault Inlet/exhaust flue obstruction
DIVAtech D F
Cure
Reconnect the external sensor 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