Komatsu PC138US-11 Operation & Maintenance Manual page 192

EXPLANATION OF COMPONENTS
The inducement strategy progresses in 5 levels, "Warning",
"Escalated Warning", "Mild Inducement", "Severe Inducement"
and "Final Inducement". The Inducement strategy includes vis-
ual alert by the DEF caution lamp (1), and Action Level dis-
played on the machine monitor (2), and the audible 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 (Mild Inducement)" and advances to further
deration when "L04 (Severe Inducement and Final Induce-
ment)" is displayed. Once the system advances to "Final In-
ducement", the engine speed is fixed to low idle. If "L03" is dis-
played, move the machine to a safe place and contact your Ko-
matsu 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 parking brake lever and work equipment lock lever
are set to LOCK position or the joystick (steering, directional
and gear shift lever) is 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 to the next
Inducement status in the column (5), and information on the
Urea SCR System condition (3), and the current status of In-
ducement (4).
• Warning:
No audible alert.
The DEF system caution lamp (1) lights up in yellow.
Note: Action Level "L01" once shows up in yellow on the
machine monitor (2) for 2 seconds and goes out.
Press F6 to display the "SCR Information" screen.
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OPERATION