: The NX-5400 Programming Manual includes a section on warning messages and service programming to troubleshoot system malfunctions.
While specific codes vary by model, several common "Warning" messages appear across the Uniwell range: Troubleshooting Uniwell Cash Register Error Codes Uniwell Cash Register Error Codes
The most useful primary sources for Uniwell cash register error codes are the official , as these typically include a dedicated "Warning Messages" or "Troubleshooting" section. Core Resources & Manuals : The NX-5400 Programming Manual includes a section