Ferroli DIVACONDENS D PLUS F 24 Instrucciones De Uso, Instalación Y Mantenimiento página 48

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. 8
Fault
Fault Possible cause
code
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
F04 Card parameter fault Wrong card parameter setting
Card parameter fault Wrong card parameter setting
Wiring interrupted / disconnected Check the wiring
Fan fault Faulty fan
F05
Card fault
Wiring interrupted / disconnected Check the wiring
Hall sensor fault Faulty sensor
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
Delivery sensor 1 fault Connector disconnected
Wiring disconnected
F10
No system H
Fume thermostat interven-
tion
Air in the system
Sensor damaged
F11 DHW sensor fault Wiring shorted
Wiring disconnected
Sensor damaged
F14 Delivery sensor 2 fault
Wiring shorted
Wiring disconnected
A16 Gas valve fault
Faulty gas valve
Fan fault
Wrong 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
48
EN
DIVACONDENS D PLUS F 24
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 opera-
tion of the heating sensor
Vent the system
Check the card parameter and modify it if
necessary
Check the card parameter and modify it if
necessary
Replace the fan
Replace the card
Check / replace the sensor
Replace 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 neces-
sary
Check the wiring or replace the sensor
O circulation
Check the circulating pump
2
Vent the system
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 neces-
sary
Check the fan and fan wiring
Check the baffle and replace it if necessary
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. 3541P653 - Rev. 01 - 03/2021
Fault
Fault Possible cause
code
Pressure too low
Incorrect system water
F37
Water pressure switch damaged
pressure
or disconnected
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
Modulating Operator wiring dis-
connected
F50 Gas valve fault
Faulty gas valve
A51 Poor combustion fault Inlet/exhaust flue obstruction
Cure
Fill the system
Check the sensor
Reconnect the external probe or disable
the sliding temperature
Check the correct positioning and opera-
tion of the sensors
Replace the sensor
Check the wiring
Check the gas valve and replace it if neces-
sary
Check the flue