Siemens LMV5 Series Technical Instructions

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section7 Page6 SCCInc.
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FaultPositioningActuator–ErrorCode15
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Anerrorcode15essentiallymeansthatanactuatorhasnotreachedthepositionitisbeingtold
todrivetobytheLMV5.Thediagnosticcodewilldetailwhichactuatorishavingtheproblem.
Ifanerrorcode15isencountered,checkforthefollowingcauses:
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1. Binding.Atfulltorqueoutput,theactuatorcannotmovethevalveordamperitistryingto
move.Thisistypicallyduetotheactuatorpushi
ngagainstmechanicalstopsonthevalveor
damper.Checkthattheactuatorwasproperlycoupled.Thismayalsobecausedbyavalve
ordamperthatrequiresmoretorquethantheactuatoriscapableof.
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2. Temperature.AllSQM…actuatorsareratedforamaximum
operatingtemperatureof
140°F.However,whenoperatingtemperaturesexceed120°F,thetorqueoutputofthe
actuatorisdecreasedby15%.Ifthisisthecase,reducetheheattotheactuator.
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3. DutyCycle.AllSQM…actuatorsareratedfora50%dutycycle,meaningthattheactuator
canonlybemovinghalfofthetime.Dutycyclesover50%cancausetheactuatorto
overheatwhichreducesthetorqueoutputseve
rely.Iftheactuatorisconstantlymoving,
improvethePIDsettingsand/oradjustparameterMinActuatorStep.
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4. Flutter.ThistypicallyoccursonairorFGRdampers.Highlyturbulentflowacrossadamper
bladecancauseanalternatingtorquetobeappliedtothedampershaft.
Thisinturnputs
analternatingtorqueontheactuatorshaft.Forexample,let’ssaythattheLMV5is
commandingtheairactuatortodriveto50.0°whichisahighlyturbulentspotontheair
damper.Thefollowingactionmaybeseen:
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 LMV5seesactuatorat50.3°andrepositionsitcounterclockwise
 LMV5seesactuatorat49.7°andrepositionsitclockwise
 LMV5seesactuatorat50.3°andrepositionsitcounterclockwise
 LMV5seesactu
atorat49.7°andrepositionsitclockwise
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Inthisscenario,eventuallytheLMV5determinesthattheactuatorcannotreachthe50.0°
positionandfaultswithanerrorcode15.Ifaflutterispresentontheairdamper,a
constanttorquecanbeappliedtotheairdamperassemblytoeliminatetheeffectsofthe
flutter.
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5. Power.AlloftheactuatorsfortheLMV5runoffof24VACpower.Measurebetween
terminals12VAC1and12VAC2ontheactuatortoensure
thereareapproximately24VAC
providedtotheactuatorthroughoutthefiringrange.Iftherearenot,seeSection2forhelp
onCANbuswiring.Dependingontheloadrequirementsofthesystem,asecond
transformermaybenecessary.
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Siemens LMV5 Series Specifications

General

Brand	Siemens
Model	LMV5 Series
Category	Control Systems
Language	English