DIVA D F
65
EN
cod. 3542A640 - Rev. 00 - 11/2022
F11
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F14
Flow sensor 2 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
A16
Gas valve fault
Wiring disconnected
Check the wiring
Faulty gas valve
Check the gas valve and replace it if neces-
sary
A23
Card parameter fault
Wrong card parameter setting
Check the card parameter and modify it if
necessary
A24
Card parameter fault
Wrong card parameter setting
Check the card parameter and modify it if
necessary
F34
Supply voltage under 180V.
Electric mains trouble
Check the electrical system
F35
Faulty mains frequency
Electric mains trouble
Check the electrical system
F37
Incorrect system water pressure
Pressure too low
Fill the system
Water pressure switch damaged or dis-
connected
Check the sensor
F39
External probe fault
probe damaged or wiring shorted
Check the wiring or replace the sensor
probe disconnected after activating the
sliding temperature
Reconnect the external probe or disable the
sliding temperature
A41
Sensor positioning
Flow sensor or DHW sensor detached
from the pipe
Check the correct positioning and operation
of the sensors
Flow temperature not increased
No complete burner ignition
Increase parameter
P1
up to a maximum of
19
F42
Heating sensor fault
Sensor damaged
Replace the sensor
F43
Exchanger protection interven-
tion.
No system H
2
O circulation
Check the circulating pump
Air in the system
Vent the system
F50
Gas valve fault
Modulating Operator wiring disconnec-
ted
Check the wiring
Faulty gas valve
Check the gas valve and replace it if neces-
sary
Fault
code
Fault
Possible cause
Cure