Komatsu H75051, Operation & Maintenance Manual

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“SCR Information” screen message (5): “2 Without treat-
ment, engine power will be derated.”
Move the machine to the safe place and contact your Ko-
matsu Distributor.
The duration time of “Continuous Warning” is 5 hour. The
remaining time (Hours and Minutes) to “Low level Induce-
ment” is displayed in the column (6) of “SCR Information”
screen.
In “Low level Inducement”, engine power will be derated.
• Low level Inducement:
The audible alert sounds in “Intermittent alarm”.
The Engine system caution lamp (1) lights up in red.
The DEF system caution lamp (2) lights up in red.
The action level “L03” lights up in red at action level dis-
play (3).
Press the menu switch to display the “SCR Information”
screen.
“SCR Information” screen message (5): “3 Engine power is
under deration.”
Due to the reduction of engine power, the machine normal
operation will be limited.
The duration time of “Low level Inducement” is 10 hour.
The remaining time (Hours and Minutes) to “Severe In-
ducement” is displayed in the column (6) of “SCR Informa-
tion” screen.
In “Severe Inducement”, engine power will be derated fur-
ther.
Move the machine to the safe place and contact your Ko-
matsu Distributor.
• Severe Inducement:
The audible alert sounds in “Non-stopping alarm”.
The Engine 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 EGR valve system abnormality is
not performed, engine power will kept be derated.
EXPLANATION OF COMPONENTS OPERATION
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