Siemens LMV51.140C1 - Unsuccessful VSD Standardization

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section7 Page20 SCCInc.

UnsuccessfulVSDStandardization

ForinformationonwhatVSDstandardizingisorhowtoperformstandardization,seeSection5.

Thestandardizedspeedcanbeviewedusingthefollowingmenupath:

Params&Display>VSDModule>Configuration>Speed>StandardizedSp

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:

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.

2. EnsurethattheLMV52isnotinalarm.Ifso,resetthefaultandattempttostandardize
again.

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.

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:

Params&Display>RatioControl>Gas/OilSettings>AirActuator

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:

Params&Display>RatioControl>Times>OperatRampMod
Params&Display>RatioControl>Times>TimeNoFlame

 Ingeneral,theVSDramptimesshouldbesetabout5secondsfaster(shorter)thanthe
LMV52ramptimes.


HOME