How can I mend my geller cash register , says no-cl?

Hi
I have a geller ex 300 cash register that says no -cl everytime I press a button. Any ideas what I have to do ?
Thank you
Dean, November 2021
No CL means no cashier listed. You must register a cashier. CLID key + number. i.e. 1,2,3 etc

3jrhgf, November 2021
link Click here to see other fixes for Geller.