La San Marco DUALE 2, Использование и обслуживание

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35
English
PROBlEM CAUsE sOlUTiOn
15. The filter cup comes off
from the dispensing unit.
• Worn gasket under the filter-
cup.
• Clean the dispensing unit and the
filter-cup.
• The authorized qualified technician
must check the gasket and replace if
necessary.
16. When coffee is being
dispensed, a part of it
drips out of the edge of the
filter-cup.
• Worn gasket under the filter-
cup.
• Clean the dispensing unit and the
filter-cup.
• The authorized qualified technician
must check the gasket and replace if
necessary.
17. Water leaking from the
drain of dispensing unit
solenoid valve. Only for
electronic dispensing unit.
• Malfunctioning of solenoid
valve of electronic dispensing
unit.
• The authorized qualified technician
must check if replace the unit
solenoid valve.
18. Light cream (the coffee
flows out of the spout
fastly).
a) Coarse coffee grinding.
b) Low pressing pressure.
c) Small quantity of ground
coffee.
d) Water temperature too low.
e) Pump pressure above 9 bar.
f) filter holes on dispensing unit
are widened.
g) filter holes are widened
(filter-cup).
a) Decrease coffee grinding.
b) Increase the pressure of ground
coffee.
c) Increase the quantity of ground
coffee.
d) Increase the temperature of the
dispensing unit.
e) Decrease pump pressure (this
operation can only be performed by
authorized qualified technician).
f) Check and clean the dispensing unit
using cup with blind filter or replace
filter.
g) Check and replace filter of the filter-
cup.
19. Dark cream (the coffee
drips out of the spout too
slowly).
a) Grinding coffee too fine.
b) High pressing pressure.
c) Large quantity of ground
coffee.
d) Water temperature too high.
e) Pump pressure below 9 bar.
f) filter holes on dispensing unit
are clogged.
g) filter holes are clogged
(filter-cup).
a) Increase coffee grinding.
b) Decrease the pressure of ground
coffee.
c) Decrease the quantity of ground
coffee.
d) Decrease the temperature of the
dispensing unit.
e) Increase pump pressure (this
operation can only be performed by
authorized qualified technician).
f) Check and clean the dispensing unit
using cup with blind filter or replace
filter.
g) Check and replace filter of the filter-
cup.
20. Coffee grounds in the cup. a) Grinding coffee too fine.
b) Grinders of coffee grinder
worn.
c) Pump pressure above 9 bar.
d) filter holes on dispensing unit
are clogged.
e) filter holes are clogged
(filter-cup).
a) Increase coffee grinding.
b) Replace grinders (this operation can
only be performed by authorized
qualified technician).
c) Decrease pump pressure (this
operation can only be performed by
authorized qualified technician).
d) Check and clean the dispensing unit
using cup with blind filter or replace
filter.
e) Check and replace filter of the filter-
cup.