OPM 200 en-GB 32
© Scania CV AB 2020, Sweden
Starting and running
Coolant temperature
An excessive coolant temperature can cause en-
gine damage.
Normal coolant temperature during operation is
90 to 95°C (194 to 203°F).
The alarm levels are set in the engine control
unit. The default setting for the lowest and high-
est limit values for high coolant temperature are
95°C/203°F and 105°C/221°F respectively. The
following function is standard as alarm for high
coolant temperature:
• Alarm and torque reduction at the lowest lim-
it value.
Depending on the engine configuration, the fol-
lowing alarm functions may also be available:
•Alarm only.
• Alarm 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 and engine shutdown at the highest
limit value with the possibility of engine shut-
down override control.
• 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.
Oil pressure
Normal oil pressure during operation is 3-6 bar
(43.5-87 psi). The lowest permitted oil pressure
when idling is 0.7 bar (10.2 psi).
The engine management system issues an alarm
at the following levels:
• At an engine speed below 1,000 rpm and an
oil pressure below 0.7 bar (10.2 psi).
• At an engine speed above 1,000 rpm and an
oil pressure below 2.5 bar (36.3 psi) for
longer than 3 seconds.
The following function is standard as alarm for
incorrect oil pressure:
• Alarm and torque reduction by 30%.
Depending on the engine configuration, the fol-
lowing alarm functions may also be available:
•Alarm only.
• Alarm and engine shutdown.
• Alarm and engine shutdown override control.
High oil pressure (above 6 bar/87 psi) is normal
if the engine is cold when started.
Charging indicator lamp
If the lamp comes on during operation: Check
and adjust the alternator drive belt according to
the instructions in the section Checking the drive
belt.
If the charging indicator lamp is still on, this
could be due to an alternator fault or a fault in the
electrical system.
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