Siemens sitrans LR 400 Instruction Manual

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7ML19985JC02 SITRANS LR 400 (Solids) – INSTRUCTION MANUAL Page 73TroubleshootingFault MessagesThe device indicates faults with a flashing letter on the right of the first line of the display.It has the following meaning:• W: Warning – device is still ready for operation but faults may occur• F: Fault – sporadic fault, device conditionally ready for operation• D: Continuous fault – device is not ready for operation• M: Maintenance fault – maintenance required or demanded. See maintenanceparameters (Parameters 6.x).Under Parameter 3.1.x, you will find a fault log which indicates the type of the fault(s) thatoccurred. It indicates the device function status in which the fault occurred and outputs afault message in plain text. The possible fault messages are described on the next page.Possible fault messages:No measured valueappears after theAuto-Setup(measured value 0 andthe fault displayflashes)Internal faultCall the fault display in Parameter 3.1.Proceed as described in Antenna Maintenance onpage 75.SITRANS LR 400 reads100% continually.Check antenna formaterial buildup.Clean antenna or order an optional PTFE dustcover.Nozzle interference,or end of horn is notinside vesselShorten nozzle or lower position of SITRANSLR 400.SITRANS LR 400reading stays aboveactual levelFalse echo fromvessel (fixedobstruction)Use 4.2.3.8 and 4.2.3.9 Auto False-EchoSuppression functionSITRANS LR 400 readslow or empty whenmaterial level is highMultiple or indirectecho detectedinstead of first echo.Set 4.2.3.2 Multiple Echo Tracking to ON. Try usingLiquid Store application type 4.2.2.1.Highly sloped surface Aim SITRANS LR 400 using Easy Aimer ball.SITRANS LR 400reading is too slow.Damping too high Decrease 4.2.3.1 Sensor DampingDecrease Level DampingSet 4.2.3.4 to OFF (Window Tracking)Window Trackingwas too slow.Message Possible causes RemedySensorMW cabledefectFaulty or damaged microwavecableRepair required: contact your local Siemensrepresentative.Sensor defect Faulty or damaged highfrequency antennaRepair required: contact your local Siemensrepresentative.Check antenna Dirty high frequency antenna Inspect antenna for contamination; clean ifpossible.Sensor too hot Sensor temperature above85 °C(185 °F)Reduce ambient temperature surrounding thedevice enclosure or reduce processtemperature. Inspect sensor for damage and ifnecessary, contact your local Siemensrepresentative.Symptom Possible causes Remedy