22
Luna/Alba | EN
Troubleshooting
Problem Cause Solution
The grinder
is not
grinding,
the display
does not
light up.
The power plug has not
been inserted.
» Insert the power plug into a properly
installed socket.
The hopper is not inserted. » Re-insert the bean hopper (see
“Inserting the hopper” section).
The thermal overcurrent cir-
cuit-breaker has beentrig-
gered.
» Check whether the circuit-breaker’s
release button has popped out. Push
it back in if necessary. If the button
repeatedly pops out, contact your
supplier (see “Maintenance and
service” section).
The back-up fuse has
tripped.
» Check the back-up fuse. Return it to
its original state or replace it. Check
if other loads are connected to this
fuse and if so, unplug them. If the
fuse trips repeatedly, contact your
supplier (see “Maintenance and
service” section).
The grinder
is humming
but not
grinding.
The grinding mechanism
is blocked. / The grinding
degree is too fine.
» Set the grinding degree to the max-
imum (coarsest) setting and start the
grinding process. The grinder will free
itself. Then set the desired grinding
degree during operation.
Ground coffee has built up
in the grinder because of
overfilling the portafilter.
» Use a brush to clean the spout
including the flapper with the
grinder switched off. Set the grind-
ing degree to the maximum (coars-
est) setting and start the grinding
process. The grinder will free itself.
Then set the desired grinding degree
during operation.
A foreign object is in the
grinding mechanism.
» Clean the grinding mechanism (see
“Cleaning the grinding mechanism”)
section and remove the foreign
object. If the foreign object cannot be
removed, contact your supplier (see
“Maintenance and service” section).
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