Ariston Euro Combi A/27 MFFI - Page 21

21
B029
DOES THE
CIRCULATION PUMP
COME ON?
YES
NO
NO
NO
YES
YES
POWER TO
THE PUMP?
DOES THE
INSUFFICIENTWATER
INDICATORLIGHTCOME
ON?(within
40 sec.)
1) Check for air in the
system
2) Check the pressure switch
foractivating pump
3)Check/replacewater
gaugeandrefill the
thesystemproperly
1) Turn the boiler off
andthen backon
again (safetyreset)
1) Check to see if pump is
stuck
2)Replacecirculationpump
1) Check
wiring
2) Check/replace
wire toPCB
3) Replace
power supply
PCB
4) Replace control
PCB
5) Check micro-
switch when hot
water is requested.
A
B