5 - Operation
101
Severity of engine defects
The messages and the associated warning lamp indicates the severity level of engine faults
The DTC (Diagnostic Trouble Code) message indicates the number of errors on the motor:
• Press on button and navigate to display the DTC menu
• Press on button to display the SPN/FMI codes
FMI: Failure Mode Identifiers
SPN: Suspect Mode Identifiers
For more details on FMI et SPN codes, report to chapter “Engine Errors Codes” page 195
Exhaust gas aftertreatment system with SCR
Normal Operation
Under normal operating conditions (exhaust temperature > 250 °C), the filter contamination with soot remains in a
permissible range and no actions are necessary. The regeneration lamp is off.
Support mode
If the operating conditions of the engine do not permit any passive regeneration permit any passive regeneration, the
contamination of the diesel particle filter with soot will increase. A throttle valve controlled via the engine control unit is located
in the combustion air inlet. This is used to increase the exhaust gas temperature for regeneration of the diesel particle filter, if this
is not reached during normal operation.
This can be the case if:
• The engine only has short operating times.
• The engine workload is not high.
This process is automatically activated by the engine control unit, the operator does not need to perform any actions. The
regeneration lamp is off.
Power reduction
If a serious fault occurs or a fault is not remedied, the system reacts by reducing the engine performance. There is a one or two-
stage performance reduction depending on the type of fault.
• Stage 1 Power reduction
• Stage 2 Torque reduction + Engine speed limitation
Messages Engine warning lamp Note
OFF
Severity step 1
Minor event
ON
Severity step 2
Reduction performance
Flashes
Severity step 3
STOP IMMEDIATELY THE ENGINE
DTC
SD
DTC
SD
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