This means that there is a hold on your account (either fees outstanding or an outstanding disciplinary issue against your name).
You need to either pay your fees or visit the Legal Office on the 5th Floor, Senate House, to clear the hold. They will issue you with a clearance certificate, which you then take to the Faculty Office.
The staff will then order your results, which will be available for collection after 2 days of you issuing the certificate to the Faculty. Contact your faculty for more information.