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Do not make attempts to repair the appliance, adjust or replace parts in the vacuum cleaner. When malfunctions happen, contact the authorized service center for examination, repair, electrical or mechanical adjustment. 2 . Do not let the cord hang over edges or touch hot surfaces. . Before you start using the vacuum cleaner, please remove large or sharp objects from the floor in order to prevent the damage of the filter or the dust bin. CAUTION: Never use the vacuum cleaner without the filter