While you wait for answers, we may have found some information which could help you.
Click here for Cash Error Message
how to emove PE error?
How to program a Royal 500dx Electronic Cash Register?
My Royal CMS-8169 has stopped printing customer receipts. ?
Royal 8160nt register. saving rates?
PE code on screen of Royal 500dx?
How do I program my Royal 480nt Tax 1 key?