Uniwell lx 5700 program manual - Office Equipment & Supplies

Did you try these codes ?
Engineer Programs ? SP-9901 Destructive RAM test ? SP-9999 Load Standard Program ? SP-9902 ROM Test with version & checksum ? SP-9913 Initialize Text (USA)
It is given in user manual
Microsoft Word - DX915D7ProgramGuide.doc (nm-pos.com)

Question edited for clarity.

You can't. The key is simple but you need a key. You local supplier probably has spare keys. It does not appear to be a mainstream company here in North America.

https://www.google.com/search?q=Uniwell+LX+5750+replacement+keys

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That would be a tax. Set the tax rate and link it to the items in programming. This company has most Uniwell manuals if you need one https://the-checkout-tech.com/manuals/cashregisters/Uniwell1.php

Change the tax rate program to 15 percent. This company has most Uniwell manuals if you need one https://the-checkout-tech.com/manuals/cashregisters/Uniwell1.php

It has no programming in it. The battery probably went flat if it was left unplugged. You need to re-program it and it should work again. One of the users has the programming manual here:
https://the-checkout-tech.com/manuals/cashregisters/Uniwell_EX-560_EX-570_EX-575_Type_05_Programming_manual.html

Probably lost the program. They will do that if the battery went flat from sitting unplugged. There are many uniwell programming manuals at Checkout tech: https://the-checkout-tech.com/manuals/cashregisters/Uniwell1.php

There may be a way to program the AX-3000 POS unit, but it would likely be easier with the specialized PC software called Tensai2000:
Uniwell Tensai2000

Additionally, this appears to be highly proprietary, with support only given to vendors and distributors. You may want to try contacting a dealer/vendor/distributor of the Uniwell AX-3000 in your area for further info.

loop reset it. 456 resey

I can download a program manual. Please list ROM ver

Regard,
Bob

There is no paper manual for Uniwell, they have an online manual. Go to www.uniwell-usa.com It is very difficult to program without the software and unless you have done a few of them. You can order keys from a local dealer.