Troubleshooting - Graef Contessa Operating Instruction

Troubleshooting

Error
74 The unit is not operational.
The control lamps are illumi-
nated, but no water flows
through.
Very loud pump noise.
Espresso escapes from above
the group handle.
No water/espresso escapes.
Possible cause
The unit is not connected to
the power supply.
Brewing unit filter clogged.
The unit is calcified.
The unit has run dry / has not
been used for a long time and
must be vented.
The unit is calcified.
The group handle is not
inserted correctly.
Coffee grounds are still on the
edge of the group handle.
The brewing unit is dirty.
The brewing unit seal is dama-
ged or worn.
No water in the water tank.
The water container has not
been inserted correctly.
The unit has run dry / has not
been used for a long time and
must be vented.
Remedy
Insert the plug into the socket.
Clean the brewing unit filter.
Descale the unit.
Open the steam wand in
order to vent the unit.
Descale the unit.
Insert the group handle in
such a way that it is tight.
Remove the coffee grounds.
Clean the brewing unit.
Contact the customer service
of Graef.
Fill the water tank.
Insert the water tank correctly.
Turn the steam wand into the
direction of the drip tray, or
put a cup under the steam
wand. Turn on the control dial
and wait until water flows.
Then turn off the control dial.