© 2016 General Electric Company. All rights reserved. Masoneilan SVI II ESD Installation and Maintenance Manual =| 1359. TroubleshootingOverviewOne of the key features of SVI II ESD is the ability to diagnose and announce any SIS failure. Thissection provides information describing the SVI II ESD diagnostics and how to use the diagnosticinformation to troubleshoot the cause of the problem.Internal DiagnosticsSVI II ESD performs internal self-diagnostics and hardware checks. When ValVue ESD or HART®Handheld or the local display indicates that there are error messages write them down fortroubleshooting.Diagnostic information is a crucial function of SVI II ESD operation. There are several methodsto perform diagnostics and to view diagnostic data. The SVI II ESD has: