Komatsu HM400-5, Operation & Maintenance Manual

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• Low level Inducement:
The audible alert sounds in short and sharp beeps.
The Engine system caution lamp (1) lights up in red.
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 (Minutes) to “Severe Inducement” is
displayed in the column (6) of “SCR Information” 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 continuous beep.
The Engine system caution lamp (1) lights up in red.
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 KDPF system abnormality is not
performed, engine performance will kept be derated.
Engine power can be restored temporarily from power derate. This engine power restoration works only
when the Inducement status is “Severe Inducement” and Engine power can be restored temporarily from
power derate. This engine power restoration works only when the Inducement status is “Severe Induce-
ment” and relieves back temporarily to the power deration of “Low level Inducement”. The operator can re-
store engine power through the machine monitor. For the engine power restoration procedure, refer to the
section of “Temporary Restoration from Inducement” in this manual. If Inducement advances to “Severe In-
ducement” and it becomes necessary to restore engine power, use the engine power restoration function to
move the machine to a safe place and contact your Komatsu distributor.
Temporary Restoration from Inducement
Temporary Restoration from Inducement is the one of the Inducement strategies allowed to be included in Urea
SCR systems.
OPERATION EXPLANATION OF COMPONENTS
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