Komatsu PC490-11, Installation And Instruction Manual

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6.
When the fan rotates in reverse, the screen shown in the
figure is displayed automatically.
This screen is kept displayed while the fan is rotating in re-
verse.
NOTICE
If the fan rotation direction cannot be reversed, the
caution lamp lights up.
When the caution lamp lights up, take actions accord-
ing to “ACTION LEVEL DISPLAY (3-20)”.
7.
To return the fan rotation direction from reverse to normal,
press switch F5 on the screen shown in the figure.
8.
Press switch F6 when the confirmation screen shown in
the figure is displayed.
(If switch F5 is pressed, the screen returns to the previous
screen.)
9.
If the screen shown in the figure is displayed, the engine
speed is set to low idle automatically and the fan rotation
direction is returned to normal in approximately 15 sec-
onds. Approximately 4 seconds after, the engine speed re-
turns to the original level.
10. When the fan rotation direction returns to normal, the
screen automatically returns to the standard screen.
EXPLANATION OF COMPONENTS OPERATION
3-74