Siemens LMV52.240B1 - Unsuccessful VSD Standardization

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section7 Page20 SCCInc.
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UnsuccessfulVSDStandardization
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ForinformationonwhatVSDstandardizingisorhowtoperformstandardization,seeSection5.
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Thestandardizedspeedcanbeviewedusingthefollowingmenupath:
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Params&Display>VSDModule>Configuration>Speed>StandardizedSp
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Fora3600RPMmotor,thestandardizedspeedistypically3500+/‐100RPM.Ifthisisthecase,
thestandardizationwassuccessful.IftheVSDdoesnotstandardizesuccessfully,checkthe
following:
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1. TheVSDcannotstandardizeifthesafetyloopisopen.Checkthatthesafetyloopisclosed
bymakingsurethereis120VAConterminalX3‐03.1.Ifthereisnot,checkthelimitsinthe
safetyloopandtheburnerflangetoseewhichlimitisopen.
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2. EnsurethattheLMV52isnotinalarm.Ifso,resetthefaultandattempttostandardize
again.
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3. Verifythespeedwheelisinstalledontheblowermotorcorrectlyandthegapbetweenthe
speedsensorandthespeedwheeliscorrect(about1/16”).Also,useSection2toverify
thatthewiringfromthespeedsensortotheLMV52iscorrect.TheyellowLEDontheback
ofthespeedsensorshouldblinkeverytimeaspeedwheel“finger”passesbythenoseof
thesensor.Ifitdoesnotblink,thesensoriswiredincorrectly,thesensorismountedtoofar
fromthespeedwheel,orthesensorisdefective.
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4. Checktoensurethattheairdamperopenswhenthestandardizationisactivated.
 Ifthisdoesnothappen,settheairactuatorto“airinfluenced”usingthe following menu
path:
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Params&Display>RatioControl>Gas/OilSettings>AirActuator
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5. Checkthera
mptimesontheLMV52andtheVSD.
 TheramptimesontheVSDmustbefaster(shorter)thantheramptimesontheLMV52.
TheLMV52ramptimescanbefoundusingthefollowingmenupaths:
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Params&Display>RatioControl>Times>OperatRampMod
Params&Display>RatioControl>Times>TimeNoFlame
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 Ingeneral,theVSDramptimesshouldbesetabout5secondsfaster(shorter)thanthe
LMV52ramptimes.
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