Operator's Manual

DPFAshAccumulation
•Thelighterashisdischargedthroughtheexhaust
system;theheavierashcollectsinthesootlter.
•Ashisaresidueoftheregenerationprocess.Over
time,thedieselparticulatelteraccumulatesash
thatdoesnotdischargewiththeengineexhaust.
•Thecomputerfortheenginecalculatestheamount
ofashaccumulatedintheDPF.
•Whenenoughashaccumulates,theengine
computersendsinformationtotheInfoCenterin
theformofasystemadvisoryoranenginefaultto
indicatetheaccumulationofashintheDPF .
•Theadvisoryandfaultsareindicationsthatitis
timetoservicetheDPF .
•Inadditiontothewarnings,thecomputerreduces
thepowerproducedbytheengineatdifferent
ash-accumulationlevels.
InfoCenterActiveFaultMessages—AshAccumulation
Indication
Level
ActiveFault
EngineSpeed
Reduction
EnginePowerRatingRecommendedAction
Level2:
Engine
Warning
g214980
Figure51
CheckEngine
SPN3720T ooHighSevere
None
Thecomputer
de-ratestheengine
powerto85%
ServicetheDPF;
refertoServicingthe
Diesel-OxidationCatalyst
(DOC)andtheSoot
Filter(page74).
Level3:
Engine
Warning
g214979
Figure52
CheckEngine
SPN3720
None
Thecomputer
de-ratestheengine
powerto50%
ServicetheDPF;
refertoServicingthe
Diesel-OxidationCatalyst
(DOC)andtheSoot
Filter(page74).
Level4:
Engine
Warning
g214978
Figure53
CheckEngine
SPN3251High
Enginespeedatmax
torque+200rpm
Thecomputer
de-ratestheengine
powerto50%
ServicetheDPF;
refertoServicingthe
Diesel-OxidationCatalyst
(DOC)andtheSoot
Filter(page74).
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