Ferroli Divatop ST F 24 Instructions For Use, Installation And Maintenance - page 24
DIVAtop F 24
24
EN
cod. 3540E821 - 11/2008 (Rev. 00)
3.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault, the display will flash together
with the fault symbol (detail 22 - fig. 1) indicating the fault code.
There are faults that cause permanent shutdown (marked with the letter “A”): to restore operation just press the RESET
button (detail 8 - fig. 1) for 1 second or RESET on the optional remote timer control if installed; if the boiler fails to start,
it is necessary to first eliminate the fault.
Other faults (marked with the letter “F”) cause temporary shutdowns that are automatically reset as soon as the value
returns within the boiler's normal working range.
Table of faults
Table. 5 - List of faults
Fault
code
Fault
Possible cause
Cure
A01
No burner ignition
No gas
Check the regular gas flow to the boiler and that the
air has been eliminated from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode and that it is cor-
rectly positioned and free of any deposits
Faulty gas valve
Check the gas valve and replace it if necessary
Ignition power too low
Adjust the ignition power
A02
Flame present signal with
burner off
Electrode fault
Check the ionisation electrode wiring
Card fault
Check the card
A03
Overtemperature protection
activation
Heating sensor damaged
Check the correct positioning and operation of the
heating sensor
No water circulation in the sys-
tem
Check the circulating pump
Air in the system
Vent the system
F05
The air pressure transducer
does not receive a sufficient
minimum value within 25
seconds
Incorrect air pressure transducer
wiring
Check the wiring
Flue not correctly sized or
obstructed
Check the length of flue and that it is clean
A06
No flame after the ignition
stage
Low pressure in the gas system
Check the gas pressure
Burner minimum pressure set-
ting
Check the pressures
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F11
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F14
Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F34
Supply voltage under 170V.
Electric mains trouble
Check the electrical system
F35
Anomalous mains frequency
Electric mains trouble
Check the electrical system
F37
Incorrect system water pres-
sure
Pressure too low
Fill the system
Sensor damaged
Check the sensor
F39
External probe fault
Probe damaged or wiring
shorted
Check the wiring or replace the sensor
Probe disconnected after acti-
vating the sliding temperature
Reconnect the external probe or disable the sliding
temperature