Ferroli DIVAtech D C32 Instructions D'utilisation, D'installation Et D'entretien page 8

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. 2
Fault
Fault Possible cause
code
No gas
Ignition/detection electrode fault
A01 No burner ignition
Faulty gas valve
Gas valve wiring disconnected Check the wiring
Ignition power too low
Electrode fault
Flame present signal with
A02
burner off
Card fault
Heating sensor damaged
Overtemperature protec-
A03 No water circulation in the sys-
tion activation
tem
Air in the system
Fume thermostat activated Fume thermostat contact open Check the thermostat
(after activation of the
Wiring disconnected
fume thermostat, boiler
F04
operation is prevented for Flue obstructed or not correctly
20 minutes) sized
Card parameter fault Wrong card parameter setting
F05
Low pressure in the gas system Check the gas pressure
No flame after the ignition
A06
Burner minimum pressure set-
phase
ting
F07 Card parameter fault Wrong card parameter setting
Wiring disconnected
Gas valve fault
A09
Faulty gas valve
Sensor damaged
Delivery sensor 1 fault Wiring shorted
F10
Wiring disconnected
Sensor damaged
DHW sensor fault Wiring shorted
F11
Wiring disconnected
Sensor damaged
F14 Delivery sensor 2 fault Wiring shorted
Wiring disconnected
Wiring disconnected
Gas valve fault
A16
Faulty gas valve
Card parameter fault Wrong card parameter setting
F20
Card parameter fault Wrong card parameter setting
A21
Card parameter fault Wrong card parameter setting
A23
Card parameter fault Wrong card parameter setting
A24
Supply voltage under
Electric mains trouble
F34
170V.
F35 Faulty mains frequency Electric mains trouble
8
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
5. TECHNICAL DATA AND CHARACTERISTICS
necessary
Table. 3- Legend, fig. 20, fig. 21 and fig. 22
Adjust the ignition power
8 DHW outlet - Ø 1/2"
Check the ionisation electrode wir-
9 DHW inlet - Ø 1/2"
ing
10 System delivery - Ø 3/4"
Check the card
11 System return - Ø 3/4"
Check the correct positioning and
14 Safety valve
operation of the heating sensor
22 Burner
Check the circulating pump
27 Copper exchanger for heating and DHW
32 Heating circulating pump
Vent the system
36 Automatic air vent
37 Cold water inlet filter
Check the wiring
42 DHW temperature sensor
44 Gas valve
Check the flue
Check the card parameter and
modify it if necessary
Check the pressures
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 card parameter and
modify it if necessary
Check the card parameter and
modify it if necessary
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. 3541P534 - Rev. 00 - 09/2021
Fault
Fault Possible cause
code
Pressure too low
Incorrect system water
F37
Water pressure switch damaged
pressure
or not connected
Probe damaged or wiring
shorted
External probe fault
F39
Probe disconnected after acti-
vating the sliding temperature
Delivery sensor or DHW sensor
Sensor positioning
detached from the pipe
A41
Not increase the flow tem-
Failed complete burner ignition
perature
F42 Heating sensor fault Sensor damaged
No system H
Exchanger protection trips.
F43
Air in the system
Modulating Operator wiring dis-
connected
Gas valve fault
F50
Faulty gas valve
DIVATECH D C
Cure
Fill the system
Check the sensor
Check the wiring or replace the sen-
sor
Reconnect the external sensor or
disable the sliding temperature
Check the correct positioning and
operation of the sensors
Increase parameter P1 up to a max-
imum of 19
Replace the sensor
O circulation
Check the circulating pump
2
Vent the system
Check the wiring
Check the gas valve and replace it if
necessary
56 Expansion vessel
74 System filling faucet
78 Anti-backflow device
81 Ignition and detection electrode
95 Diverter valve
114 Water pressure switch
126 Fume thermostat
136 Flowmeter
137 Pressure sensor
194 DHW exchanger
241 Automatic bypass
278 Double sensor (Safety + heating)