ENGLISH
33
TECHNICAL MANUAL
10. TROUBLESHOOTING
10.1 Indications on the display
GRIND GR I
or
ii
NOT VALID
cause
remedy
1.
Grinding too coarse
1.
Use the relative knob on
the grinder-doser to
make grinding finer
2.
Grinding time too long
3.
Microswitch unit faulty or
connection interrupted
-
Press the key
NO COFFEE gr i
or
ii
1.
There is no coffee in the grinder-
doser hopper
2.
Valve on the grinder-doser is closed
3.
The coffee chute is clogged
0.
Press the key
2.
Enter grinding programming and reduce
grinding time
3.
Restore connection
and/or change the
microswitch unit if
necessary
1.
Put coffee beans in the grinder-doser
hopper
2.
Open the valve on the grinder-doser
hopper
3.
Remove the coffee
chute and remove fat
residuals with hot
water or change the
coffee chute
4.
The piston is locked in the high
position either because there is a
lot of dirt or because the return
spring is faulty
4.
Remove the unit, remove the
piston, clean and change the
faulty parts (springs,
gaskets, pipes).
display
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