Komatsu PC290LC-6K Operation & Maintenance Manual page 62

11. EXPLANATION OF COMPONENTS
6. LAMP SWITCH
This switch turns on the working lamps and monitor illumination.
OFF
Standard work lamps
Standard and additional work lamps (if fitted)
7. ALARM BUZZER STOP SWITCH
This is used to stop the alarm buzzer when it has sounded to warn of
some abnormality in the EMERGENCY STOP ITEMS while the engine is
running.
8. LOWER WIPER SWITCH (If fitted)
This switch actuates the front lower wiper.
OFF: wiper stops
ON: wiper moves continuously
NB. Do not operate with front lower screen removed.
9. HORN BUTTON
When the button at the tip of the right work equipment control lever is
pressed, the horn will sound.
10. KNOB BUTTON
The button at the tip of the left work equipment control lever is used
to actuate the power max./swift slow-down functions. Press the button
once (single click) and keep it depressed. In the heavy-duty and general
operation modes, the power max. function actuates for max. 8.5 seconds
and the swift slow-down function actuates while the button is depressed.
11. HEATED OPERATOR SEAT SWITCH (If fitted)
This switch is used to switch on the heated seat.
OFF: seat not heated
ON : seat heated
12. BEACON SWITCH (If fitted)
This switch is used to switch on the rotating beacon.
OFF
ON: beacon lights lights and rotates
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