La San Marco 20/20 CLASSIC Montageanweisung, Bedienung Und Wartung Seite 50

DEFECT
16. The portafilter unhooks
from the brewing group.
17. When coffee is brewed, part
of it spills out from the edge
of the portafilter.
18. Water leaking from the
brewing group solenoid
drain.
19. Light cream (the coffee
flows out of the delivery
spout too quickly).
20. Dark cream (the coffee
flows out of the delivery
spout too slowly).
CAUSE
portafilter.
portafilter.
malfunction.
a) Coarse grinding.
b) Low tamping pressure.
c) Low quantity of ground
coffee.
d) Water temperature too low.
e) Pump pressure greater than 9
bar.
f) The brewing group filter holes
expand.
g) The filter holes have
expanded (portafilter).
a) Coffee grinding too fine.
b) High tamping pressure.
c) High quantity of ground
coffee.
d) Water temperature too high.
e) Pump pressure less than 9
bar.
f) The filtering holes of the
brewing group are clogged.
g) The filter holes are clogged
(portafilter).
SOLUTION
portafilter.
must check the gasket, and replace it
if necessary.
portafilter.
must check the gasket, and replace it
if necessary.
must check whether the group
solenoid needs to be replaced.
a) Reduce the coffee grinding size.
b) Increase the pressure of the ground
coffee.
c) Increase the quantity of ground
coffee.
d) Increase the temperature of the
brewing group.
e) Reduce the pump pressure (this can
only be done by authorized qualified
technicians).
f) Check and clean the brewing group
using the portafilter with blind filter
or replace the filter.
g) Check and replace the filter of the
portafilter.
a) Increase the coffee grinding size.
b) Reduce the pressure of the ground
coffee.
c) Reduce the quantity of ground
coffee.
d) Reduce the temperature of the
brewing group.
e) Increase the pump pressure (this
can only be done by authorized
qualified technicians).
f) Check and clean the brewing group
using the portafilter with blind filter
or replace the filter.
g) Check and replace the filter of the
portafilter.
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