Ferroli F24 Installation, Service And User Instructions Manual page 42

NO
Check and if necessary
replace P.C.B.
Chart 6
Check ignition system
Is LED1 light on?
Does sparking start
at burner?
YES
Does burner light?
NO
Is LED2 on
after 10 seconds?
YES
Reset lockout
Does burner light now?
NO
Is flame present before
lockout condition?
YES
Adjust with P4 ignition
burner pressure
Check and if necessary
clean burner
Check and if necessary
clean injectors
Check and if necessary
clean flame electrode
Check right position
of spark electrode
Check wires
Is LED2 on
NO
the boiler sparking
Go to chart 6
YES
Check and if necessary
replace safety thermostat
Check electrodes and
leads for damage
and correct connection
Check and if necessary
replace P.C.B.
YES
NO
Check gas supply
is live and purged
Check and if necessary
replace gas valve
without
YES NO
Re-check
air pressure switch