Siemens LMV5 Series Technical Instructions

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page19 Section7

VSDWillNotOperate

IftheVSDwillnotoperatetheblower(blowerwillnotspin)whentheLMV52standardizationis
activated,checkthefollowing:

1. EnsurethattheVSDisactivatedthroughthefollowingmenupathintheLMV52:

 Params&Display>RatioControl>Gas/OilSettings>VSD=activated

2. 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.

3. EnsurethattheLMV52isnotinalarm.Ifso,resetthefaultandattempttostandardize
again.

4. Verifythatthe0/4‐20mAsignalandtherun/stopcontactwiredbetweentheVSDandthe
LMV52arewiredcorrectly.SeeSection2formoreinformationonwiring.

5. Verifythatthethree‐phasemotorwiringbetweentheVSDandthemotoriscorrect.

6. VerifythattheVSDissetupproperlyforthemotoritisdriving.Specifically,checkthe
following:

 TheVSDshouldbespannedsothat0/4mAequals0Hzand20mA=62Hz(ona60Hz
gridfrequency).SeeSection5formoreinformation.
 TheVSDisinremotemodesothatitlooksfora0/4‐20mAsignalandarun/stop
contact.Closingtherun/stopcontactshouldcausetheVSDtooperatethemotor.

7. Disconnecttheanalogsignalandrun/stopcontactwiresbetweentheVSDandtheLMV52.
Useahandheld0/4‐20mAsourceandatoggleswitchtoverifythattheVSDrespondstoa
contactclosureandavarying0/4‐20mAsignal.

 IftheVSDdoesnotrespond,correcttheconfigurationoftheVSD.

 IftheVSDrespondstothecontactclosureandthevarying0/4‐20mAsignal,
thengotothenextstep.

8. WiththewiresbetweentheLMV52andVSDstilldisconnected,useamulti‐metertoverify
thattheLMV52outputsabout19.5mAduringthestandardization(seenotebelow).Also
verifythattherun/stopcontactintheLMV52closesandremainsclosedduringthe
standardization.

HOME

Siemens LMV5 Series Specifications

General

Brand	Siemens
Model	LMV5 Series
Category	Control Systems
Language	English