PREVOST H3-41 Manual page 34

CONTROLS & INSTRUMENTS
Fast Idle
For extended idling periods, run
the engine at fast idle.
down
engage fast idle. This increases
the
approximately 1,000 rpm.
Note:
If the parking brake is released and/or the
transmission is engaged with the engine running
at fast idle, the engine will return to low idle and
remain there as long as the parking brake is not
applied and/or transmission is not placed in
neutral (N).
Caution:
reduce the engine to low idle before
shutting the engine off.
Transmission Retarder (Optional)
Press down rocker switch to
actuate
Refer to
Controls " in this chapter.
JACOBS Engine Retarder (Optional)
Press down rocker switch to the
first position to actuate system
2/3 engine brake and press to the
second
application of engine brake. Refer
to "Other Features" chapter (page
4-11).
Warning :
Engine brake must be used on dry
road only. Never use the engine brake on
slippery roads. It could result in a loss of control.
Note :
Engine brake is activated when
accelerator pedal is released and the engine
speed is higher than 750 rev/minutes. Stop lights
are on when the engine brake is used.
Press
the rocker switch to
engine speed to
transmission retarder.
" Steering Column
position for a full
Engine Stop Override or DDEC
Diagnostic Request
Engine Stop Override
Press down this switch and
release to override emergency
engine shut down protection.
Engine emergency shut down will
be turned off for 30 seconds. This
procedure can be repeated if
done before the 30 seconds are
up.
Caution
: Use sparingly and in order to move
coach to a safe parking place only. Excessive
use can cause severe engine damage.
DDEC Diagnostic Request
With the engine at idle or off and with the ignition
switch in the " ON " position, press and release
the rocker switch. Active codes will be flashed
on the " Stop Engine " and inactive codes on the
" Check Engine " telltale lights alternately. The
first digit of the diagnostic code is determined by
the number of flashes before a short pause. The
second number of the diagnostic code is then
flashed in the same manner. As an example,
code " 25 " (everything O.K.) consists of two
flashes, followed by a short pause, then five
flashes. Refer to the " technical information "
chapter under " DDEC IV Diagnostic Codes "
Baggage Compartment Central
Locking System
Note
: Service panels are not linked to the
central locking system.
3-10
This optional system enables
locking all
compartment doors by pressing
down on the upper portion of the
switch. To unlock
compartments, press down on
the lower portion of the switch.
baggage
all