PREVOST H3-45 2023 Operator's Manual page 140

5-8 Other Features
DEF TANK LEVEL - DRIVER WARNINGS AND INDUCEMENTS
Conditions / Triggers
Normal
1
DEF tank level sensor reads
between 100% and 12%
2 Low DEF tank warning
DEF tank level sensor reads
between 12% and 0.1%
3 DEF tank near empty
DEF tank level sensor reads less
than 0.1%
4 DEF tank empty and one (1)
hour of operation in engine
derate mode
5 DEF tank empty and either
1. Diesel fuel refueling done with a
fuel level sensor reading increase
of 15%, or more
2. Vehicle stationary (speed=0) for 20
minutes with engine off or at idle
DEF Tank LOW LEVEL Indicator, DID
Message and audible warning
None
solid
blinking
blinking
blinking
PA-1652 Operator's Manual H3-45 Coach
DEF TANK LEVEL LOW
REFILL DEF SOON TO
PREVENT ENGINE
DERATE
3 beeps
DEF TANK EMPTY
REFILL DEF TO AVOID 5
MPH LIMIT
ENGINE IN DERATE
3 beeps
DEF TANK EMPTY
REFILL DEF TO AVOID 5
MPH LIMIT
ENGINE IN DERATE
3 beeps
REFILL DEF TANK
VEHICLE SPEED
LIMITED TO 5 MPH (8
KM/H)
constant tone
Inducement
None
Warning
message
Engine
torque
reduction of
25%
Engine
torque
reduction of
40%
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