Komatsu H75051 Operation & Maintenance Manual page 202

EXPLANATION OF COMPONENTS
Inducement status (4): "1 DEF low level warning appears."
Add DEF to the DEF tank immediately.
• Continuous Warning:
The audible alert sounds in "Intermittent alarm".
2 gradations of the DEF level gauge light up in the red
range.
DEF level caution lamp (1) lights up in red.
No Action level is displayed.
Press the menu switch to display the "SCR Information"
screen.
Inducement status (4): "2 Without treatment, engine power
will be derated."
Add DEF to the DEF tank immediately.
• Low level Inducement:
The audible alert sounds in "Intermittent alarm".
1 gradation of the DEF level gauge light up in red.
The DEF level caution lamp (1) lights up in red.
Action Level "L03" is displayed in red (5).
Press the menu switch to display the "SCR Information"
screen.
Inducement status (4): "3 Engine power is under deration."
Add DEF to the DEF tank immediately.
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OPERATION