Ferroli DIVATOP D HF Instructions For Use, Installation & Maintenance page 76

Fault
Fault
code
Card parameter fault
A23
Card parameter fault
A24
Supply voltage under 180V.
F34
Faulty mains frequency
F35
Incorrect system water pressure
F37
External probe fault
F39
Sensor positioning
A41
Flow temperature not increased
Heating sensor fault
F42
Exchanger protection intervention.
F43
Gas valve fault
F50
76
Possible cause
Wrong card parameter setting
Wrong card parameter setting
Electric mains trouble
Electric mains trouble
Pressure too low
Water pressure switch damaged or
disconnected
probe damaged or wiring shorted
probe disconnected after activating
the sliding temperature
Flow sensor or DHW sensor deta-
ched from the pipe
No complete burner ignition
Sensor damaged
No system H O circulation
2
Air in the system
Modulating Operator wiring discon-
nected
Faulty gas valve
cod. 3540000180 - Rev. 00 - 05/2023
DIVATOP D HF
Cure
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
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 neces-
sary
EN