DPFAshAccumulation
•Thelighterashisdischargedthroughtheexhaustsystem;theheavierashcollectsinthesootlter.
•Ashisaresidueoftheregenerationprocess.Overtime,thedieselparticulatelteraccumulatesash
thatdoesnotdischargewiththeengineexhaust.
•ThecomputerfortheenginecalculatestheamountofashaccumulatedintheDPF .
•Whenenoughashaccumulates,theenginecomputersendsinformationtotheInfoCenterintheformofan
enginefaulttoindicatetheaccumulationofashintheDPF .
•ThefaultmessagesindicatethatitistimetoservicetheDPF.
•Inadditiontothewarnings,thecomputerreducesthepowerproducedbytheengineatdifferent
ash-accumulationlevels.
InfoCenterAdvisoryandEngineWarningMessages—AshAccumulation
Indication
Level
FaultCode
EngineSpeed
Reduction
EnginePowerRatingRecommendedAction
Level1:
Engine
Warning
CheckEngine
SPN3720,FMI16
None
Thecomputer
de-ratestheengine
powerto85%.
ServicetheDPF;refer
toParkedorRecovery
Regeneration(page33)
Level2:
Engine
Warning
CheckEngine
SPN3720,FMI0
None
Thecomputer
de-ratestheengine
powerto50%.
ServicetheDPF;refer
toParkedorRecovery
Regeneration(page33)
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