Komatsu HB365LC-3, Operation & Maintenance Manual

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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 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.
Perform the following procedure.
Press F6 on the standard screen to display the “SCR Informa-
tion” screen of the user menu.
If either the lock lever is set to LOCK position or the travel lever
and control levers are in NEUTRAL position for over 3 sec-
onds, “SCR Information” screen of the user menu will pop up
automatically while the Urea SCR system is in Inducement.
“SCR Information” screen displays remaining time (Hour and
minute) to the next Inducement status in the column (6), and in-
formation on the Urea SCR System condition (4), and the cur-
rent status of Inducement (5).
• Warning:
The audible alert sounds in short and sharp beeps.
The Engine system caution lamp (1) lights up in red.
The action level “L03” lights up in red at action level dis-
play (3).
Press F6 to display the “SCR Information” screen.
EXPLANATION OF COMPONENTS OPERATION
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