Service Manual

Groundsmaster 4500−D/4700−DPage 3 − 8Yanmar Diesel Engine
Types of regeneration that are performed automatically (while the machine is operating)
Type Conditions Description
Passive
Occurs during normal operation of the
machine at high engine speed or high
engine load.
The DPF processes high heat exhaust
gasses, oxidizing harmful emissions
and incinerating soot to ash.
The InfoCenter does not display an icon
during passive regeneration.
Assist
Occurs because of prolonged operation
at low engine speed, low engine load,
or when the engine ECU detects the
soot filter is becoming obstructed.
The engine ECU adjusts the exhaust
intake throttle to raise the exhaust
temperature.
For software 120−6373A thru M only:
the InfoCenter displays the assist
regeneration icon.
Reset Occurs every 100 hours of engine
operation.
Occurs after an assist regeneration if
the engine ECU determines the assist
regeneration did not sufficiently reduce
the soot level.
Note: Reset regeneration may be
temporarily delayed if high exhaust
temperatures would create an unsafe
condition (the machine is operating
indoors or outdoors around trees, brush,
tall grass, or other temperature−sensitive
plants or materials). Refer to Setting
the Inhibit Regen in the traction
unit Operators Manual for additional
information.
The engine ECU adjusts the exhaust
intake throttle and the injector timing to
raise the exhaust temperature.
For all software revisions:
the InfoCenter displays the high exhaust
temperature icon.