Ariston GENUS 41-116-01 Service Manual page 23

B
DOES THE FAN
COME ON?
YES
C
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
NO
BOILER
SHUTDOWN?
NO
PUMP
SAFETY DEVICE
ACTIVATED?
NO
INTERNAL
SAFETY DEVICE
FOR PCB
ACTIVATED?
NO
IS THERE POWER
TO THE FAN?
YES
1) Replace fan
1) Reset the boiler
YES
1) Check/replace differential
pressure switch for pump
2) Check/replace wi r i n g
3) Check/repl a ce P.C.B. wire
YES
4) Check/repl a ce power
supply P.C.B.
5) Check/replace control
P.C.B.
1) Check/replace air
pressure switch/wiring
2) Check whether reset
YES
button is stuck
Check/replace flame
3)
detection electrode
1) Check/replace wiring
2) Check/ replace
3) Check/ replace power
NO
supply P.C.B.
Check/replace control
4)
P.C.B.
5) Check/replace air
pressure switch
P.C.B. wire
23