PREVOST H3-45 2023 Operator's Manual page 141

DEF QUALITY - DRIVER WARNING AND INDUCEMENT
Conditions / Triggers
1 Good DEF quality
2 Poor DEF quality detected
3 Poor DEF quality detected and one (1) hour
of operation
troubleshooting code
4 Poor DEF quality detected and four (4)
hours of operation with active diagnostic
troubleshooting code
5 Poor DEF quality detected
Diesel fuel refueling done with a fuel level
sensor increase of 15% or more
or
Vehicle stationary (speed=0) for 20 minutes
with engine off or at idle
or
Key cycle trigger
with active diagnostic
PA-1652 Operator's Manual H3-45 Coach
Amber Warning Light & DID
Message And Audible Warning
None
POOR DEF
QUALITY
solid
DETECTED
SERVICE DEF
SYSTEM AT NEXT
STOP
3 cycles of 2 beeps
POOR
QUALITY
solid
DETECTED
ENGINE IN DERATE
5 MPH (8KM/H)
LIMIT IN <
MINS
3 cycles of 2 beeps
SERVICE DEF
5 MPH (8KM/H)
solid
LIMIT NEXT 20MIN
VEHICLE STOP
3 cycles of 2 beeps
SERVICE DEF
VEHICLE SPEED
solid
LIMITED TO 5 MPH
(8 KM/H)
continuous cycle of 2
beeps
Other Features 5-9
Inducement
None
Warning
message
Engine will
derate 25% in <
60 mins
DEF Engine derated
25%
Engine will
derate 40% in
<240 mins
XXX
Engine derated
40%
5 mph (8 km/h)
limit after next 20
min vehicle stop
Service DEF
Vehicle road
speed limited
(RSL) to 5 mph
(8 km/h)
Note: The vehicle
has to be
stationary before
5 mph (8 km/h)
road speed limit
becomes active