La San Marco 20/20 CLASSIC Serie Emploi Et Entretien page 51

DEFECT
21. Coffee grounds in the
cup.
22. Coffee with too little
cream in cup (spurts out
of spout).
23 The cream in the cup is
too thin (it disappears
after a few seconds).
24. Depressions in the coffee
grounds (looking inside
the portafilter).
Note:
S.p.A. service centre.
50
CAUSE
a) Coffee grinding too fine.
b) Grinders of coffee grinder
worn.
c) Pump pressure above 9 bar.
d) Filter holes on brewing group
are clogged.
e) Filter holes are clogged
(portafilter).
brewing group are clogged.
long time due to the clogged
brewing group filter.
long time due to the clogged
portafilter filter.
clogged.
SOLUTION
a) Increase coffee grinding size.
b) Replace grinders (this operation can
only be performed by authorized
qualified technicians).
c) Decrease pump pressure (this
operation can only be performed by
authorized qualified technicians).
d) Check and clean the brewing group
using portafilter with blind filter or
replace filter.
e) Check and replace filter of the
portafilter.
using the portafilter with blind filter
or replace the filter.
using the portafilter with blind filter
or replace the filter.
portafilter.
brewing group.
using the portafilter with blind filter
or replace the filter.