Maintenance; Periodical Inspection; List Of Faults; Troubleshooting Diagnostics - Ferroli Diva F24 Manual

DIVA F24

4.3 Maintenance

Periodical inspection

To ensure proper operation of the unit over time, have qualified personnel carry out a
yearly inspection, providing for the following checks:
• The control and safety devices (gas valve, flow switch, thermostats, etc.) must func-
tion correctly.
• The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. - The sealed chamber must be
tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
• The air/fume terminal and ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. Do not use chemical
products or wire brushes to clean.
• The electrode must be properly positioned and free of deposits.
= =
fig. 15 - Electrode positioning
• The gas and water systems must be tight.
• The pressure of the water in the system when cold must be approx. 1 bar; otherwise,
bring it to that value.
• The circulating pump must not be blocked.
• The expansion tank must be filled.
• The gas flow and pressure must match that given in the respective tables.
4.4 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 11 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdown (marked with the letter "A"): to restore
operation, press the RESET button (detail 6 - fig. 1) for 1 second or RESET on the op-
tional remote timer control if installed; if the boiler fails to start, it is necessary to eliminate
the fault.
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. 8 - List of faults
Fault
Fault Possible cause
code
No gas
Ignition/detection electrode fault
A01 No burner ignition
Faulty gas valve
Ignition power too low
Electrode fault
Flame present signal with
A02
burner off
Card fault
Heating sensor damaged
Overtemperature protection
No water circulation in the system Check the circulating pump
A03
intervention
Air in the system
Safety thermostat intervention
F04 Card parameter fault Wrong card parameter setting
Air pressure switch contact open
Air pressure switch (fails to
Faulty air pressure switch wiring Check the wiring
F05 close contacts within 20 sec. of
Wrong baffle
fan activation)
Flue obstructed or not correctly
sized
Low pressure in the gas system Check the gas pressure
No flame after the ignition
A06
phase
Burner minimum pressure setting Check the gas pressures
Air pressure switch contact open
Faulty air pressure switch wiring Check the wiring
Air pressure switch (contacts
F07
closed on activation of fan)
Wrong baffle
Flue obstructed or not correctly
sized
Fault
code
A09
A16
A23
A24
Cure
Check the regular gas flow to the
boiler and that the air has been
eliminated from the pipes
Check the wiring of the electrode and
that it is correctly positioned and free
of any deposits
Check the gas valve and replace it if
necessary
Adjust the ignition power
Check the ionisation electrode wiring
Check the card
Check the correct positioning and
operation of the heating sensor
Vent the system
Check safety thermostat operation
Check the card parameter and
modify it if necessary
Check the pressure
switch / Fan / Fan socket
Make sure the baffle is correct
Check the length of the
flues / Clean the flues
Check the pressure
switch / Fan / Fan socket
Make sure the baffle is correct
Check the length of the
flues / Clean the flues
cod. 3541E054 - Rev. 00 - 07/2015
Fault Possible cause
Wiring disconnected
Gas valve fault
Faulty gas valve
Sensor damaged
F10 Delivery sensor fault Wiring shorted
Wiring disconnected
Sensor damaged
F11 DHW sensor fault Wiring shorted
Wiring disconnected
Wiring disconnected
Gas valve fault
Faulty gas valve
Card parameter fault Wrong card parameter setting
Card parameter fault Wrong card parameter setting
F34 Supply voltage under 140VAC Electric mains trouble
F35 Faulty mains frequency Electric mains trouble
Pressure too low
Incorrect system
F37
Water pressure switch damaged
water pressure
or not connected
No system H
Exchanger protection
F43
intervention.
Air in the system
F50 Controller DBM32 fault Controller DBM32 internal error
F51 Controller DBM32 fault Controller DBM32 internal error
Cure
Check the wiring
Check the gas valve and replace
it if necessary
Check the wiring or replace
the sensor
Check the wiring or replace
the sensor
Check the wiring
Check the gas valve and replace it if
necessary
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
O circulation
Check the circulating pump
2
Vent the system
Check the earth connection and
replace the controller if necessary.
Check the earth connection and
replace the controller if necessary.
EN
17