Scania DI13 - Page 22

OPM 250 en-GB 22
© Scania CV AB 2022, Sweden
Starting and running
Limp home operation
If there is a fault in the normal throttle opening or
if CAN communication is interrupted, the fol-
lowing emergency operation option is provided:
A CAN fault or throttle opening fault in an all-
speed engine (both signal and idling switch):
• The throttle opening value is 0% and the en-
gine is running at normal idling speed.
• The throttle opening value is 0% and the en-
gine is running at fixed raised idling speed
(750 rpm) if this function is activated.
CAN fault:
• The engine is switched off if the shutdown
function is activated.
Driving at high altitude
When driving at high altitudes engine power is
reduced automatically due to the lower oxygen
content in the air. It is then not possible to run the
engine at maximum power.
• ICFN and PRP engines may be used at an al-
titude of up to 2,000 metres.
• IFN, Patrol Craft Longand Patrol Craft Short
engines must not be used at an altitude of
more than 1,000 metres.
• Contact Scania if the operating conditions de-
viate from these.
Coolant temperature
IMPORTANT!
An excessive coolant temperature can cause en-
gine damage.
Normal coolant temperature during operation is
90 to 95°C/194 to 203°F for engines with a heat
exchanger and 83 to 88°C/181 to 190°F for en-
gines 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.