Mack V-MAC IV - Aftertreatment System Conditioning (Periodic Heat Mode)

46V-MACCo-PilotOperator'sManual
AftertreatmentSystemConditioning(PeriodicHeat
Mode)
Duringperiodsofextendedidling(typically8ormorehours),theaftertreatment
systemwillaccumulateunburnedhydrocarbonsthatarereleasedfromadieselengine.
Accumulationofthesehydrocarbonscanoxidizeintheaftertreatmentsystemandcan
causedamagingtemperaturespikesandpotentialhardwarefailuresuponresumed
drivingorduringaftertreatmentDPFstationaryregenerationevents.
Extendedidlingperiodsshouldbelimitedtolessthan24hoursinordertoprotect
theaftertreatmentsystem.However,forcustomerswhoidletheirvehiclespastthe
24hourlimit,aperiodicheatmode(knownasAftertreatmentSystemConditioning),
wasdevelopedforthecatalyzedaftertreatmentsystem.
Note:AftertreatmentsystemconditioningisNOTavailableonvehiclesequippedwith
anon-catalyzedaftertreatmentsystem.
AftertreatmentsystemconditioningpurgestheDPFofaccumulatedhydrocarbons
typicallyevery8to15hoursofextendedidlingtime.Theprocessisaccomplishedby
elevatingexhausttemperaturestoapproximately100to200°Cfor5to8minutes,and
byrampinguptheenginebetween1050and1400RPM(dependentonenginemodel,
ambientairtemperature(AA T)andaltitude).
Whenaftertreatmentsystemconditioningisactiveandtheenginerampsup,a
messagewillappearontheCo-Pilot®Displayindicatingthatthecycleisactive
andnodriverinputisnecessary.Whenthecycleiscompleted,theenginewillramp
downtonormalidlingspeed.
Note:Itisrecommendedthattheaftertreatmentsystemconditioningcyclenotbe
interruptedwhileinprogress.Ifpossible,donotsteponthethrottle,releasethepark
brakeormoveoutofneutraluntilthecycleiscompleted(from5to8minutes).
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