Selective Catalytic Reduction Unit - PREVOST H3-45 VIP Owner's Manual

Initiating A Stationary (Parked) Regeneration
NOTE
At starting of the engine, if a stationary
regeneration is required, the engine coolant
temperature must reach 140°F (60°C) before any
stationary regeneration may be initiated and
completed. Permit the engine to idle for a short
while or drive the vehicle until engine temperature
increases sufficiently.
WARNING
Do not initiate a stationary regeneration in a closed
area like a garage. Stationary regenerations must
be undertaken outdoors only.
WARNING
During stationary
temperature may reach up to 1200°F (650°C) at the
particulate filter. Before
regeneration, make sure that the DPF outlet
diffuser is clear of objects and that no one is
working near the DPF outlet diffuser.
WARNING
Hot surfaces. Keep yourself clear of all hot
Aftertreatment Device components, particularly
during and after active or stationary regeneration.
Hot surfaces can cause serious burns.
NOTE
STATIONARY REGENERATION
This process requires the vehicle to be parked
while the driver or a maintenance technician
initiates the regeneration process.
The DPF Regeneration telltale light illuminates to
notify the driver of the need and urgency of a manual
stationary regeneration.
DPF REGENERATION telltale light
If stationary regeneration is not performed, this
telltale light will blink, indicating that a stationary
regeneration is required immediately. If stationary
regeneration is still not performed, "engine power
derate and shutdown" sequence may occur as per
level 1 to level 4 sequence.
regeneration, exhaust
initiating stationary
PA-1638 Owner's Manual X3-45 VIP
To initiate a stationary regeneration:
Park the vehicle in a clear area, vehicle speed
l
must be 0 mph (0 km/h);
Engine must be on normal idle and fully
l
warmed up (coolant temperature above
140°F/60°C);
Apply parking
l
transmission to neutral (N).
Press the DID ENTER button and then get to
l
the DID Aftertreatment menu. Select sub-
menu Request Parked REGEN and press
ENTER button to confirm and initiate
regeneration.
The regeneration will begin. Turn off the air
conditioning to reduce engine load. The engine idling
speed will increase to 1600 rpm. Once the
regeneration is completed, the engine speed will
return to normal idle.
Voluntary Interruption Of A Stationary Regen-
eration
It is possible to interrupt a stationary regeneration at
all time. To do so, get to the DID's Aftertreatment
menu, select Cancel REGEN and press ENTER
button to confirm. You can stop regeneration simply
by releasing the parking brake. Use this procedure in
order to move the vehicle in a safe area only.
If regeneration is interrupted, it is very important to
reinitiate the regeneration as soon as possible.
CAUTION
If an active regeneration is stopped repeatedly, the
vehicle may need to be taken to a service facility.
The service facility will use a service tool to
manually initiate the regeneration. Moreover, the
interruption of active regeneration should not be
considered as a
components of the aftertreatment system might be
damaged in the long term.

SELECTIVE CATALYTIC REDUCTION UNIT

Selective Catalytic Reduction (SCR) is a technology
that uses Diesel Exhaust Fluid (DEF) and a catalytic
converter to reduce
emissions.
SCR is an exhaust aftertreatment system that
injects small amount of DEF into the exhaust gas
between the DPF and the selective reduction
catalytic converter. DEF turns to ammonia and
carbon dioxide when heated. The exhaust stream
Other Features 5-5
brakes and set
normal practice. Some
nitrogen oxides (NOx)
the