OPM 200 en-GB 25
©
Scania CV AB 2014, Sweden
Starting and running
Reaction to fault in SCR system
Once the fault has been remedied and the engine
control unit has received an indication that it is
working, torque returns to the normal level.
If a new fault occurs within 40 hours of operation
since the first fault, the warning lamp will come
on. After 30 minutes of operation, the warning
lamp will flash rapidly and torque will be re-
duced to 0% (low idling) within 30 minutes.
If the torque has been reduced to 0% (low
idling), the engine control unit does not detect
that the SCR system is functioning again. A ser-
vice technician must then reset the system so that
the torque returns to the normal level.
The torque reduction applies only to engines that
are certified according to Tier 4.
Time Warning
lamp
Torque reduction
1
1. Applies only to engines that are certified according to Tier
4.
Fault detect-
ed
Constant
light
After 30
minutes
Flashing Torque is reduced by
1% per minute to
70% of the highest
torque
After 4 hours Flashing rap-
idly
Torque is reduced to
0% (low idling)
within 2-10 minutes
Symbol for fault in SCR system
Property of American Airlines
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