MACCHIAVALLEY SELECTION Classic Manual De Instrucciones página 26

EN
Problem
The coffee dispenses
too quickly
The coffee is too cold
The coffee is tepid
The coffee is too hot
Diagnostics/Solution
The coffee dispenses too quickly and
the cream is clearer than usual.
Possible causes:
1- The grind of the coffee is too
coarse.
2- The coffee in the portafilter is
packed too tightly.
3- The coffee portion in the portafilter
is insufficient.
4- The pressure of the pump is too
high [>10 bar (1 Mpa)] (volumetric
pump version).
Possible causes:
1- The portafilter is cold.
2- The coffee grind is too fine.
3- The water circuit of the machine is
dirty (lime).
4- The boiler pressure is lower than
0.8 bar (0.08 Mpa).
The coffee is tepid, although the pres-
sure is normal between 1 and 1.2 bar
(0.12 Mpa).
In this case, the pressure measure-
ment is incorrect.
Possible causes:
1- The boiler pressure is higher than
1.3 bar (0.13 Mpa).
2- The machine is covered with some-
thing that prevents it from cooling.
3- The machine has been installed in a
position that prevents air circulation.
26
SELECTION Classic
Suggestions
In cases 1-2-3, you will
need to adjust the grinder
correctly. In case 4, you
will need to call a techni-
cian.
In case 1, always keep
the portafilter mounted on
the AromaPerfect brewing
group.
In case 2, change the cof-
fee grind.
In cases 3 - 4, call a skilled
technician.
Call a skilled technician
to check the relief valve.
Meanwhile, in order to use
the machine, open the
steam valve (Fig. 01; pos.
7), the boiler pressure will
drop to zero: This will con-
nect the heating elements
and the temperature will
increase. Continue this
operation every day when
turning on the machine.
In case 1, call a skilled
technician.
In cases 2-3, reset
the machine cooling
conditions.