Starting and running Reaction to fault in SCR system 319 563 Symbol for fault in SCR system 1. Applies only to engines that are certified according to Tier 4. 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. IMPORTANT! 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. Note: The torque reduction applies only to engines that are certified according to Tier 4. OPM 300 en-GB 28 © Scania CV AB 2015, Sweden Time Warning lamp Torque reduction1 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