Ariston Euro Combi A/27 MFFI - Page 22

22
B029
DOES THE FAN
COME ON?
BOILER
SHUTDOWN?
ISTHEREPOWER
TO THE FAN?
NO
YES
YES
YES
NO
YES
NO
NO
NO
1)Check/replace differential
pressure switch for pump
2)Check/replace wiring
3)Check/replace PCB wire
4) Check/replace power
supply PCB
5) Check/replace control
PCB
1)
pressure switch/wiring
2) Check whether reset
button isstuck
3)
detection electrode
Check/replaceair
Check/replaceflame
1)
2)
3)Check/replace power
supply PCB
4)
5)
Check/replace wiring
Check/replace PCB wire
Check/replace control
PCB
Check/replace air
pressure switch
1)Replacefan
1) Reset the boiler
PUMP
SAFETYDEVICE
ACTIVATED?
INTERNAL
SAFETYDEVICE
FOR PCB
ACTIVATED?
B
C
YES