Komatsu WA480-8 Operation & Maintenance Manual page 211

OPERATION
engine power restoration procedure, refer to the section of "Temporary Restoration from Inducement" in this
manual. Once in "Severe Inducement" and it becomes necessary to restore engine power, use the engine
power restoration function to move the machine to a safe place and add DEF.
Inducement strategy when abnormalities are detected in the Urea SCR System
devices (Except abnormalities in the KDPF and the EGR system)
If any abnormality is detected in the DEF quality or in the Urea SCR system, the Inducement strategy is activa-
ted.
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 DEF system caution lamp (1), and Action Level displayed
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 (Low level Inducement)" and advances to further
deration when "L04 (Severe Inducement)" is displayed. 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 the menu switch on the standard screen to display the
"SCR Information" screen of the user menu.
After a lapse of 3 seconds to stop the machine, "SCR Informa-
tion" screen is displayed.
"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 two seconds and goes out.
Press the menu switch to display the "SCR Information"
screen.
EXPLANATION OF COMPONENTS
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