Siemens LMV52.240B1 - Ambient or Stack Temperature Sensor Reading Incorrectly; AZL Says O2 Module Not Active or Not Available

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page15 Section7
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AmbientorStackTemperatureSensorReadingIncorrectly
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IftheambientorstacktemperaturesensorwiredintothePLL52arenotreading(displayedas
“XXXX”ontheAZLscreen),orthesensorsarereadingincorrectly,checkthefollowing:
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1. EnsurethatthesensorsarewiredintothePLL52modulecorrectly.SeeSection2toverify
properwiring.
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2. Bothsensorsmustbea2‐wire,1000Ohm,platinumornickelRTD.Checktoseethatthe
sensorsareactivatedandproperlyconfiguredunderthefollowingmenupaths:
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 Params&Display>O2Module>Configuration>SupAirTempSens
 Params&Display>O2Module>Configuration>FlueGasTempSens
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 Note: TheambientandstacktemperaturesensorsarenotnecessaryforO
2
trim.However,if
oneorbothinputsareconfiguredforasensorandeithersensorisnotreading,theO
2
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trimwillnotactivate.
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AZLSays“O2ModulenotactiveornotAvailable”
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IftheAZLdisplaysthemessage“O2ModulenotactiveornotAvailable”whentryingtoaccess
oneofthefollowingmenus,theLMV52haslostcommunicationwiththePLL52O
2
module.
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Params&Display>O2Contr/Alarm‐or‐
Params&Display>O2Module
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ChecktheCANbuswiringbetweentheLMV52andthePLL52.SeeSection2forwiring
assistance.Oncecommunicationshavebeenre‐established,accesstotheO
2
menuswillbe
allowed.
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TodeactivatetheO
2
moduleentirely,usethefollowingmenupath:
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 Params&Display>SystemConfig>O2Ctrl/LimitrGas(Oil)=mandeact
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