Ariston MICROCOMBI 23 MFFI

20
IS THE FAN
RUNNING?
BOILER
SHUTDOWN?
POWER
TO FAN?
NO
YES
YES
NO
YES
NO
NO
YES
1 - Check/replace air
pressure switch
2 - Check if reset button
is jammed
3 - Check/replace flame
detection electrode
1 - Check/replace
connection cable
2 - Check/replace P.C.B.
3 - Check air pressure
switch is not stuck
the N.O. position
1 - Replace fan
1 - Reset the boiler
INTERNAL
P.C.B. PROTECTIONS
ACTIVATED?