Esp-880 in Professional Installed

Hi we have just started a refurbishment of a venue and we are installing a bunch of new controlspace equipment. Our quote is planning to use one of the existing esp880 units however we have just discovered it is Password Locked, How can we reset it to factory defaults please? so we can upload a new design. I have checked all the manuals etc but can't find any factory default reset.  Thank you for your help.


I will send you a private message on this.


I have the same problem, can you help me? Thank you so much.