how to reset uniwell nx5400 ecr?

There is a way to unlock them called initial reset. I haven't worked with that model. I know that there is a manual on the net with initial reset in it so I send my customers there

https://the-checkout-tech.com/manuals/cashregisters/Uniwell_NX-5400_type_02_programming_v2_manual.html

Registerman
August 2019