Ferroli DIVATOP D C Instructions For Use, Installation & Maintenance page 63

DIVATOP D C
Fault
Fault
code
F39 External probe fault
Sensor positioning
A41
Flow temperature not increased
F42 Heating sensor fault
Exchanger protection interven-
F43
tion.
F50 Gas valve fault
EN
Possible cause
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 disconnec-
ted
Faulty gas valve
cod. 3540000140 - Rev. 02 - 09/2023
Cure
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 wiring
Check the gas valve and replace it if necessary
63