GE Grid Solutions D25User's ManualGE Information 994-0081-3.00-21 105Chapter 5: Operating the D25LED IndicatorsFront PanelIndicatorsThe front panel has three sets of LED indicators, providing a visual indicationof the operational status of the unit:LED Color and FunctionOPERATIONPOWER Green: on when power supply is operating normally.RUN Green: on when the D25 microprocessor system isrunning. With a Type III WESDAC board the RUNLED flashes at about 2 Hz, depending on processorload.COMMUNICATIONSIED1 (COM 3)IED2 (COM 4)XCOM 1 (COM 5)XCOM 2 (COM 6)Red: on to indicate whether and when each port istransmitting (TX) and/or receiving (RX):Note: XCOM indicators light only if card isinstalled.CONTROLSLOCALREMOTEThe D25 Plant I/O Subsystem monitors the state ofthe CONTROLS switch only if a control board isinstalled.If the CONTROLS switch is in the REMOTEposition at startup:• green LOCAL LED lights immediately when the D25is turned on.• green LED remains on until the D25’s internal POSTdiagnostics are complete.• if the diagnostics do not pass, the indicator remainsgreen.After the D25 has started up normally, the indicatorshould follow the state of the CONTROLS switch:• if the switch is moved to the REMOTE position, thered REMOTE LED lights after a momentary delay,and the LOCAL LED turns off.Local/Remote LEDs flashing indicate one or more activesealed-in outputs (only if a D25 High Current KE ControlOutput Module is present in the D25)
