61PBD-51041064 SITRANS LG270 - Operating Instructions44293-EN-171021CodeText mes-sageCause Rectification DevSpec State in CMD 48S603Impermissibleoperating volt-age• Operating voltage belowspecified range • Check electrical connection• If necessary, increase oper-ating voltageBit 11 of Byte 14 … 24The following table shows the error codes and text messages in thestatus message "Maintenance" and provides information on causesas well as corrective measures.CodeText mes-sageCause Rectification DevSpec State in CMD 48M500Error in the de-livery status• The data could not berestored during the reset todelivery status• Repeat reset• Load XML file with sensordata into the sensorBit 0 of Byte 14 … 24M501Error in thenon-activelinearisationtable• Index markers are not con-tinuously rising, for exampleillogical value pairs• Check linearisation table• Delete table/Create newBit 1 of Byte 14 … 24M504Error at a de-vice interface• Hardware defect • Exchanging the electronics• Send instrument for repairBit 4 of Byte 14 … 24M505no measuredvalue avail-able• Sensor does not detect anecho during operation • Check and correct mountingand/or parameter adjustmentBit 5 of Byte 14 … 24• Process component or probecontaminated or defective • Clean or exchange processcomponent or probeM506Installation/Setup error• Error during setup • Check and correct mountingand/or parameter adjustment• Check probe lengthBit 6 of Byte 14 … 24M507Error in theinstrumentsettings• Error during setup• Error when carrying out areset• False signal suppressionfaulty• Carry out reset and repeatsetupBit 7 of Byte 14 … 249.4 Rectify faultsThe operator of the system is responsible for taking suitable meas-ures to rectify faults.The first measures are:• Evaluation of fault messages via the adjustment device• Checking the output signal• Treatment of measurement errorsMaintenanceReaction when malfunc-tion occursProcedure for fault recti-fication