JLG EC450AJ Operation & Safety Manual page 53

Drive Orientation
When the boom is swung beyond the rear drive tires or further in either di-
rection, the Drive Orientation indicator will illuminate when the drive func-
tion is selected. This is a signal for the operator to verify that the drive
control is being operated in the proper direction (i.e., controls reversed
situations).
Footswitch Enable
To operate any function, the footswitch must be pressed down and the
function selected within seven seconds. The enable indicator shows that the
controls are enabled. If a function is not selected within seven seconds, or if
a seven second lapse between ending one function and beginning the next
function, the enable light will go out and the footswitch must be released
and pressed again to enable the controls.
Releasing the footswitch removes power from all controls and stops all
functions.
To avoid serious injury, do not remove, modify, or disable the footswitch by
blocking or any other means.
Platform Overload
Indicates the platform has been overloaded.
System Distress
The light indicates that the JLG Control System has detected an abnormal
condition and a Diagnostic Trouble Code has been set in the system memo-
ry. Refer to the Service Manual for instructions concerning the trouble codes
and trouble code retrieval.
The system distress indicator light will illuminate for 2-3 seconds when the
key is positioned to the On position to act as a self test.
Tilt Warning Light and Alarm
This red illuminator indicates that the chassis is on a slope. If the boom is
above horizontal and the machine is on a slope, the tilt alarm warning light
will illuminate, an alarm will sound, available functions are placed in Creep
speed, and drive is cut out in direction of travel. Drive in the opposite direc-
tion may be allowed under certain conditions.
Tilt Angle
If tilt warning light is illuminated when boom is raised or extended, retract and
lower to below horizontal then reposition machine so that it is within the limits of
the maximum operating slope before extending boom or raising boom above
horizontal.
EC450AJ, EC520AJ
WARNING
5°
WARNING
Machine Controls and Indicators
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