While you wait for answers, we may have found some information which could help you.
Click here for Sales Rate Currently Changeolympia CM 812 ?
How can I change the date on a Olympia S2200 cash register?
Where can I buy parts for Olympia CM220 Cash Register?
olympia cm 1810 plus locked?
How to fix my Olympia CM701?
Where can I source a spindle for an Olympia CM1810+ cash register?