Ariston GENUS 27 PLUS Installation Instructions Manual page 39

B
IS THE FAN
NO
RUNNING?
YES
C
BOILER
SHUTDOWN?
NO
PUMP PROTECTION
ACTIVATED?
NO
INTERNAL
P.C.B. PROTECTION
ACTIVATED?
NO
POWER
TO FAN?
YES
1 - Replace fan
YES
1 - Reset the boiler
1 - Check/replace different
pressure switch for pump
2 - Check/replace wiring
YES
3 - Check/replace P.C.B. wire
4 - Check/replace power
supply PCB
5 - Check/replace control PCB
1 - Check/replace air
pressure switch/wiring
YES
2 - Check whether reset
button in stuck
3 - Check/replace flame
detection electrode
1 - Check/replace
2 - Check/replace P.C.B.
wire
NO
3 - Check/replace power
supply PCB
4 - Check/replace air
pressure switch
FC001Ac
19