PREVOST H3-45 2023 Operator's Manual page 82

4-26 Controls and Instruments
Engine Coolant Temperature (°F)
Indicates the operating temperature of the engine coolant in °F. The
normal reading should be between 170°F and 222°F (80°C to 106°C).
The temperature limit is dependent on the electronic program for the
engine model. When coolant temperature is excessive, the STOP
telltale light turns on, an audible alarm sounds and a pop-up message
appears on the DID. The engine protection system will automatically
derate and stop the engine in 30 seconds. Stop at the first safe place
where the problem can be checked.
If the temperature remains below or exceeds the normal temperature
range, the cooling system should be checked for problems.
Engine Oil Pressure (psi)
Indicates the engine oil pressure in psi. When the oil pressure is too
low, the STOP telltale light turns on, an audible alarm sounds and a
message appears on the DID. The engine protection system will
automatically derate and stop the engine in 30 seconds. Bring the
vehicle to a safe stop where the problem can be checked.
OIL PRESSURE Pictogram
CAUTION
Failure to take necessary action when the STOP telltale light is on
can ultimately result in automatic engine derate and shutdown.
PA-1652 Operator's Manual H3-45 Coach
STOP telltale light
STOP telltale light