Komatsu H75051 Operation & Maintenance Manual page 208

EXPLANATION OF COMPONENTS
• Severe Inducement:
The audible alert sounds in "Continuous alarm".
The KDPF system caution lamp (1) lights up in red.
The DEF system caution lamp (2) lights up in red.
Action level "L04" lights up in red at action level display (3).
Press the menu switch to display the "SCR Information"
screen.
"SCR Information" screen message (5): "4 Engine power is
under heavy deration."
Due to the further deration of engine power, capability the
machine will be limited further.
If the restoration of the KDPF system abnormality is not
performed, engine power will kept be derated.
Engine power can be restored temporarily from power derate. This engine power restoration works only
when the Inducement status is "Severe Inducement" and relieves back temporarily from power derate. 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 "Tempora-
ry Restoration from Inducement" in this manual. If Inducement advances to "Severe Inducement" and it be-
comes necessary to restore engine power, use the engine power restoration function to move the machine
to a safe place and contact your Komatsu distributor.
Inducement strategy when abnormality is found in the EGR Valve System by the
Urea SCR system
If any abnormality is detected in the EGR Valve 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 Engine 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 derates. En-
gine power deration starts with Action Level "L03 (Warning,
Continuous Warning and Low level Inducement)" and advances
to further deration when "L04 (Severe Inducement)" is dis-
played. Once the system 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.
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OPERATION