OPM 250 en-GB 22
©
Scania CV AB 2016, Sweden
Starting and running
Coolant temperature
Normal coolant temperature during operation is
90-95°C/194–203°F for engines with a heat ex-
changer and 83-88°C/181-190°F for engines
with keel cooling.
Alarm levels are set in the engine control unit.
The default setting for the lowest and highest
limit values for high coolant temperature are
95°C/203°F and 105°C/221°F respectively.
The high coolant temperature alarm has the fol-
lowing functions:
• Alarm only.
• Alarm and torque reduction at the lowest lim-
it value.
• Alarm at the lowest limit value and engine
shutdown at the highest limit value.
• Alarm, torque reduction at the lowest limit
value and engine shutdown at the highest lim-
it value.
• Alarm at the lowest limit value and engine
shutdown at the highest limit value with the
possibility of engine shutdown override con-
trol.
• Alarm, torque reduction at the lowest limit
value and engine shutdown at the highest lim-
it value, with the possibility of engine shut-
down override control.
If run for extended periods under an extremely
light load, the engine may have difficulty in
maintaining the coolant temperature. At an in-
creased load the coolant temperature rises to the
normal value.
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