Komatsu WA380-8, Operation & Maintenance Manual

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• Severe Inducement:
The audible alert sounds in “Non-stopping 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.
The inducement strategy progresses in 4 levels, “Warning”,
“Continuous Warning”, “Low level Inducement”, and “Severe In-
ducement”. The Inducement strategy includes visual alert by
the KDPF System caution lamp (1), DEF system caution lamp
(2), and Action Level displayed on the machine monitor (3), au-
dible alert by a buzzer and stepwise engine power deration that
advances to speed limitation to low idle. Engine power deration
starts with Action Level “L03 (Warning, Continuous Warning
and Low level Inducement)” and advances to further deration
when “L04 (Severe Inducement)” is displayed. Once the sys-
tem advances to “Severe Inducement”, the engine power will
be further derated. If “L03” is displayed, move the machine to a
safe place and contact your Komatsu distributor.
The content of the warning can be checked on the “SCR Information” screen of the user menu.
EXPLANATION OF COMPONENTS OPERATION
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