Komatsu H75051, Operation & Maintenance Manual

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• Low level Inducement:
The audible alert sounds in “Intermittent alarm”.
The DEF system caution lamp (1) lights up in red.
Action level “L03” lights up in red at action level display (2)
and stays on.
Press the menu switch to display the “SCR Information”
screen.
“SCR Information” screen message (4): “3 Engine power is
under deration.”
Due to the engine power deration, capability of the ma-
chine will be limited.
Move the machine to the safe place and contact your Ko-
matsu Distributor.
The duration of “Low level Inducement” is 10 hours. The
remaining time (Hours and Minutes) to “Severe Induce-
ment” is displayed in the column (5) of the “SCR Informa-
tion” screen.
In “Severe Inducement”, engine power will be derated fur-
ther.
• Severe Inducement:
The audible alert sounds in “Continuous alarm”.
The DEF system caution lamp (1) lights up in red.
Action level “L04” lights up in red (2).
Press the menu switch to display the “SCR Information”
screen.
“SCR Information” screen message (4): “4 Engine power is
under heavy deration.”
Due to the further deration of engine power, capability the
machine will be limited further.
“Severe Inducement” is the final status of Inducement.
Unless all the “SCR system” abnormalities are corrected,
engine performance will be kept derated.
Engine power can be restored temporarily from power derate. If Inducement advances to “Severe Induce-
ment” and it becomes necessary to restore engine power, use the engine power restoration function to
move the machine to a safe place and contact your Komatsu distributor. This engine power restoration
works only when the Inducement status is “Severe Inducement” and relieves back temporarily to the power
deration of “Low level Inducement”. The operator can restore engine power through the machine monitor.
For the engine power restoration procedure, refer to the section of “Temporary Restoration from Induce-
ment” in this manual.
Inducement strategy when abnormality is found in the KDPF System by the
Urea SCR system
If any abnormality is detected in the KDPF System through the Urea SCR system, the Inducement strategy is
activated.
OPERATION EXPLANATION OF COMPONENTS
3-139