Saeco Intelia Deluxe HD8906/06 Manual page 16

5 To place the brew group back, make sure that the lever is in contact with
the base of the brewing unit.
Note: If it is not in contact with the base, push it down.
6 Make sure the locking hook of the brew group is in the correct position.
To position the hook correctly, push it upwards until it is in uppermost
position.
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