Bezzera MATRIX DUO Manuel D'instructions page 59

7 - TROUBLESHOOTING
Problem
No steam output from the wand The tip of the steam wand is
Leaks from filter holder
Difficulty in inserting the filter
holder on the group head
Incorrect position of the fil-
ter holder once inserted in the
group
The flow of coffee is scarce
The flow of coffee is excessive
Troubleshooting/Solution
clogged; unclog it with needle.
This problem is caused by the way
the spout is inserted into the milk.
Possible causes:
1) The group head gasket is worn
or encrusted.
2) The filter holder is incorrectly
inserted in the group.
The problem can be caused by
an excessive dose of coffee in the
filter holder.
Once inserted on the group, the
handle of the filter holder has
shifted to the right. The group
head gasket is worn.
The coffee is dispensed drop by
drop, the output time is too long
and the quality of it is not good,
the cream is dark.
Possible causes:
1) The coffee is ground too finely.
2) The coffee has been pressed
too firmly in the filter holder.
3) The dose in the filter holder is
excessive.
4) The group shower is clogged.
5) The filter in the filter holder is
clogged.
6) The pressure delivered by the
pump is low (< 9 bar - 0.9
MPa) or is not working.
The coffee is dispensed too quick-
ly and the cream is lighter than
usual.
Possible causes:
1) The coffee is ground too
coarsely.
2) The coffee in the filter holder
has not been pressed firmly
enough.
3) The dose in the filter holder is
scarce.
4) The pressure delivered by the
pump is too high (>10 bar - 1
MPa).
59
BEZZERA MATRIX-DUO
MOD.
Advice
Clean the steam spout after
each use.
Clean it using the brush sup-
plied.
If the problem reoccurs, it is
necessary
to call in a specialist technician
Decrease the quantity of coffee
in the filter holder. (Standard
doses for filters are 10 g per
dose).
Call a specialised technician to
replace the group head gasket.
In cases 1-2-3, the problem
can be solved by adjusting the
grinding and/or dosing.
In cases 4-6, contact a techni-
cian. In case 5, clean or replace
the filter.
In cases 1-2-3, adjust the grind-
ing and/or dosing of coffee.
In case 4, contact a technician.