Komatsu HB215LC-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. When action level
“L03” is displayed, move the machine to a safe place and con-
tact 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 to display the “SCR Information” screen.
If the lock lever is set to LOCK position or the travel lever and
control levers are in NEUTRAL position for over 3 seconds,
“SCR Information” screen of the user menu will pop up auto-
matically while the Urea SCR system is in Inducement.
“SCR Information” screen displays remaining time (Hours and
Minutes) to the next Inducement status in the column (6), and
information on the Urea SCR System condition (4), and the
current status of Inducement (5).
• Warning:
The audible alert sounds in Intermittent alarm.
The engine system caution lamp (1) lights up in red.
The action level “L03” is displayed in red (3).
Press F6 to display the “SCR Information” screen.
OPERATION EXPLANATION OF COMPONENTS
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