All error codes By model: T1100T1500T1600T1700T2300T2500T2600T610T730T830T930Z5200Z6Z6200Z9 Model T2300 Error Code 8:04 Problem Description Touch Control Panel communication failure during use Corrective Action Options Turn off/on. Upgrade the Firmware Schedule Service Call ⭢ (301) 340-0000 Email ⭢ Contact Us