Technical Product Manual - DCT1900Maintenance, Test and Maintenance SoftwareMaint-DCT1900/R8/mw 2-5© 2000-20052.2.3 MaintenanceIf the fault counter does not exceed its limits, T&M will now try to correct the error by resetting thecircuit or board. This is called a T&M reset. This reset causes the circuit or board to start a selftest. When the fault is cleared after this, the fault is intermittent. T&M will release the circuit bychanging its state to AVE. In the Fault Table the fault message will be completed with the statuscode R (released).When the fault returns after the self test, the fault is persistent. T&M will take the circuit out ofservice by changing its state to malfunctioning, MFG, and raise an alarm. This alarm is called ageneral alarm. A general alarm will cause the following:z The general alarm relay on the MCCB is activated.z An alarm message is sent to the MS (Mobility only).z A "system service required" window appears on the PC screen when the CSM software isrunning.z A fault report is written in the service table.z The fault message in the fault table is completed with the status code S (service).z The faulty circuit or board is set to MFG.It should be noted that service is only required when a general alarm occurs. For those faultswhere a message is only written into the info and fault tables, no service is required because thesystem is not malfunctioning yet. The service table can be read out by executing the Select File -Create Service Report command. The error message in the table indicates the fault code, themalfunctioning board or circuit, its position in the system and a time–and–date stamp.2.2.4 Error TablesThe three different error tables, as indicated above are:z Info tablez Fault tablez Service tableAll tables have a size of 40 messages each. The info and fault table are cyclic buffers. The bufferalways holds the last 40 messages. These two tables may never be cleared, except by a CPUreset or a system power down.The service table is a non–cyclic buffer. This means that when full, new error messages will not belogged. All service tables may be cleared by accessing the Clear Service Message commandunder System on the CSMW menu bar.All tables can be displayed by the Distributor–Diagnostics–Info–Error tables menu of the CSMWsoftware.
