FORCE W
3.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In the case of a boiler fault, the display will light up,
indicating the fault code and, in case of connection in cascade, the number of the module.
There are faults that cause permanent shutdown (marked by the symbol OK to reset): to restore operation, just press
the OK button for 1 second or RESET on the remote timer control (optional) if installed; if the boiler fails to start, the
fault must be eliminated first.
Other faults cause temporary shutdowns which are automatically reset as soon as the value returns within the boiler's
normal working range.
Table of faults
Table. 6 - List of faults
Fault
Fault
code
A01
No burner ignition
Flame present signal
A02
with burner off
Overtemperature pro-
A03
tection intervention
Fume extraction duct
A04
safety device interven-
tion
A05
Fan protection activated Fault F15 generated for 1 hour (consecutive)
No flame after ignition
A06
stage (6 times in 4
minutes)
F07
High fume temperature
F10
Delivery sensor 1 fault
F11
Return sensor fault
EN
Possible cause
No gas
Ignition/detection electrode fault
Faulty gas valve
Insufficient gas supply pressure
Trap blocked
Faulty ignition transformer (only models Prodotto
220 C and Prodotto 320 C)
Electrode fault
Card fault
Heating sensor damaged
No water circulation in the system
Air in the system
Fault F07 generated 3 times in the last 24 hours
Ionization electrode fault
Flame unstable
Gas valve Offset fault
air/fume ducts obstructed
Trap blocked
Flue partially obstructed or insufficient
Fume sensor position
Sensor damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
cod. 3541Q760 - Rev. 00 - 02/2019
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
Check the gas supply pressure
Check the trap and clean it if necessary
Check and replace it if necessary
Check the ionization electrode wiring
Check the card
Check the correct positioning and operation of
the heating sensor
Check the circulating pump
Vent the system
See fault F07
See fault F15
Check the position of the ionization electrode
and replace it if necessary
Check the burner
Check the Offset adjustment at minimum power
Remove the obstruction from the flue, fume
extraction ducts and air inlet and terminals
Check the trap and clean it if necessary
Check the efficiency of the flue, fume extraction
ducts and outlet terminal
Check the correct positioning and operation of
the fume sensor
Check the wiring or replace the sensor
Check the wiring or replace the sensor
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