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Control and operation
93
Read this manual carefully before starting any work!
This is particularly applicable to the chapter “General Safety Instructions”
and the respective safety instructions in the chapters.
DEF/AdBlue
®
/AUS32/AUS40 - insufficient quality
The aftertreatment monitoring system is equipped with a DEF/AdBlue
®
/AUS32/AUS40 quality sensor.
The sensor monitors the quality of the reduction agent. In the event of insufficient quality and hence
potentially increased NOx emissions, the request system reacts and displays a warning to the operator
that the quality of the reduction agent is insufficient.
The quality monitoring is deactivated under two different environmental conditions:
S
Temperature
The reduction agent must be liquid and may not be hot → - 9 °C < reduction agent < 60 °C
S
Tank level
Quality cannot be measured if no reduction agent is present. The system must be filled with the
reduction agent to activate the monitoring system (again).
Notice:
In addition, the quality of the reduction agent is also subjected to a plausibility check via the NOx sensors.
This offers redundancy if the quality of the reduction agent is insufficient. If a defective quality sensor cannot
detect insufficient reduction agent quality, the system continues to detect an error via the NOx sensor
.
Errors and manipulation - aftertreatment system
Detection of an error or manipulation is an important element for ensuring correct system operation.
To ensure that the applicable emissions standards for which the engine was certified are continuously
adhered to, a reaction algorithm is stored that reliably detects manipulations and/or errors.
9.3.3 U.S. Tier 4 Marine requirements of the request system
The MAN aftertreatment system serves to provide support in satisfying the U.S. Tier 4 Marine emissions
limit values, among other things. The aftertreatment system is permanently monitored for errors. In the
event that an error is detected and/or the aftertreatment system is not working correctly, this is visually
(IMAGE) and acoustically communicated to the operator.
Important information for U.S.-flagged vessels
In the case of emissions-related alarms, “See Operating Instructions for further information” is shown
in the display. For the alarms, the operator must initiate further measures in accordance with U.S.
EPA Title 40 CFR §1042.660. Non-compliance with these instructions contravenes U.S. federal law
(40 CFR 1068.101(a), (b)). Emissions-related alarms are permanently stored in the emissions history
memory and cannot be deleted.