Table 15:Internal fault indicationsFault indication Additional informationInternal FailReal Time Clock ErrorHardware error with the real time clock.Internal FailRuntime Exec. ErrorOne or more of the application threads are not working properly.Internal FailSW Watchdog ErrorThis signal will be activated when the terminal has been under tooheavy load for at least 5 minutes.Internal FailRuntime App ErrorOne or more of the application threads are not in an expected state.Internal FailIEC 61850 ErrorIEC 61850 has not succeeded in some actions such as reading theconfiguration file or start-up.Internal FailDNP3 ErrorAn error in DNP3 communication has occurred.Internal FailPSM1-ErrorA PSM card error has occurred. The instance number is shown aspart of the fault indication, such as 1 in this example.Internal FailBIM3-ErrorA binary-in-module error has occurred. The instance number isshown as part of the fault indication, such as 3 in this example.Internal FailBOM4-ErrorA binary-out-module error has occurred. The instance number isshown as part of the fault indication, such as 4 in this example.Internal FailIOM5-ErrorA in/out-module error has occurred. The instance number is shownas part of the fault indication, such as 5 in this example.Internal FailNUM30-ErrorA NUM card error has occurred. The instance number is shown aspart of the fault indication, such as 30 in this example.Internal FailSLM301-ErrorA SLM card error has occurred. The instance number is shown aspart of the fault indication, such as 301 in this example.8.2.2 Warnings GUID-7BAFA38E-5163-4E01-A7C3-6489B42233C7 v5The warning message associated with the fault is found in the internal event list inthe LHMI menu Main menu/Diagnostics/Internal events. The message includesthe date, time, description and signal state for the fault. The current status of theinternal fault signals can also be checked via the LHMI in Main menu/Diagnostics/IED status/General.When a fault appears, record the fault indication message and state it whenordering service.1MRK 500 128-UEN B Section 8Troubleshooting650 series 2.2 IEC 79Operation manual