There are a few issues that could cause your Device Type Mismatch error. The most common issue is that the system has not been configured properly. Therefore, the software programming and the hardware in the field do not match up correctly. More advanced issues may include incorrect or incomplete information being stored in the access panels.
Perform the steps below to troubleshoot the mismatch. Each step should be performed only after the previous step is completed. Once a step is complete, test the system to see if the issue has been resolved. If it has not been resolved, continue to the next step.