Ariston GENUS 27 PLUS Installation Instructions Manual page 38

1 - Check if there is air in the
system
2 - Check main circuit flow switch
operation
3 - Check pressure on the water
gauge and fill system to return
to 1 bar
1 - Turn the boiler off then on
(protection reset)
18
A
DOES THE
CIRCULATION PUMP
COME ON?
YES
DOES THE
INSUFFICIENT WATER
YES
INDICATOR LIGHT COME
ON? (within
40 sec.)
NO
B
NO
POWER TO
THE PUMP?
YES
1 - Check that the pump
is not stuck
2 - Replace circulation pump
NO
1 - Check wiring
2 - Check/replace wire to
pump from PCB
3 - Replace power supply
PCB
4)- Replace control PCB
5)- Check DHW probe when
drawing DHW (at least 1
minute) in DHW only
mode or in heating and
DHW mode
FC001Ab