Operator`s manual

OPERATION
409
Extended Idling and Aftertreatment System Conditioning
(Periodic Heat Mode)
Extended idling performed on this vehicle equipped with an exhaust
aftertreatment system should be carried out at a low engine idle speed.
There is no benefit to using a raised engine idle speed for extended
idling. The only exception is for active PTO operation. Utilizing an
engine speed above 1300rpm is recommended for vehicles which
perform extended idling with an active PTO.
During periods of extended idling, normally greater than 8hrs, the
catalyzed DPF system needs to perform a routine conditioning cycle.
The conditioning cycle is controlled by the Engine ECU and will start
and stop automatically as needed. The ATS conditioning is required to
maintain normal exhaust aftertreatment system function and should
not be stopped. ATS conditioning will not occur on non-catalyzed DPF
systems.
During these events the engine speed will increase to approximately
1050–1400rpm, for non-PTO operation, in order to complete the
exhaust aftertreatment conditioning cycle. Exhaust temperatures will
also elevate slightly but remain much lower than those reached during
regeneration and present no danger.
If a compatible driver display is available a message will be displayed
when the conditioning cycle is in progress. The message indicated in
the driver’s display will be “ATS Conditioning in Progress, No Action
Required.” If no driver display is available there will be no indication of
an ATS conditioning event except for the automatic increase in engine
speed.
IF ATS conditioning is unsuccessful and extended idling is continued a
yellow lamp will be displayed. If this fault occurs extended idling should
be stopped and driving resumed as soon as possible. If a yellow lamp
is active and idling is continued a red lamp will be displayed and finally
an engine shutdown. In the event that a red lamp is reached during
extended idling the vheicle should be serviced to diagnose the problem
in the aftertreatment system and inspect the DPF system for damage.
Aftertreatment system hardware problems, driver intervention, and
certain PTO operations could cause an ATS conditioning to fail.
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