Ferroli DIVA D C24 Instructions D'installation, D'entretien Et D'utilisation page 50

Fault
Fault
code
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
F39 External probe fault
Sensor positioning
A41
Flow temperature not increased
F42 Heating sensor fault
Exchanger protection interven-
F43
tion.
F50 Gas valve fault
50
Possible cause
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
probe damaged or wiring shorted
probe disconnected after activating the
sliding temperature
Flow sensor or DHW sensor detached
from the pipe
No complete burner ignition
Sensor damaged
No system H O circulation
2
Air in the system
Modulating Operator wiring disconnected Check the wiring
Faulty gas valve
cod. 3542B920 - Rev 07 - 06/2024
DIVA D C24
Cure
Check the wiring
Check the gas valve and replace it if neces-
sary
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
Check the wiring or replace the sensor
Reconnect the external probe or disable the
sliding temperature
Check the correct positioning and operation
of the sensors
Increase parameter P1 up to a maximum of
19
Replace the sensor
Check the circulating pump
Vent the system
Check the gas valve and replace it if neces-
sary
EN