Maeda CC423S-1, Operation Manual

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C. Limit alarm
• The applicable working range limit display flashes in
orange.
• The tri-colour revolving working status lamp illuminates
in yellow.
• The announcement is given and the alarm generates
continuous sound “peep”.
The alarm buzzer is activated only when the operation
lever is turned on.
• Operation of the boom’s danger side stops automatically.
1. Lifting height upper limit switch
Use this switch to set or reset the upper limit value for the lifting
height.
While the lifting height limit is imposed by detecting the boom tip
height, the display panel displays the lifting height when the hook
is hoisted up to the over-hoisting detected state.
[Setting]
Set the boom to the desired lifting height in a condition in which
no upper limit value is set, and press and hold the switch.
The monitor display changes to the orange color and the lifting
height is set as the upper limit value.
NOTES
• Before performing a practical operation, be sure to check if the boom automatically stops when it
reaches the specified lifting height limit. If the boom does not stop, set the upper limit for the lifting
height again by repeating the above procedure.
• When the boom is in the warning alarm zone or upper limit stop state, an alarm sounds intermittently
only if raising operation or extension operation is performed.
•
The set value is memorized when the starter switch is turned to the “OFF” position.
When the boom is in the prediction zone or upper limit stop state in a condition in which the lifting height is
set, the monitor display illuminates in orange.
[Resetting]
Press and hold the switch in a condition in which the upper limit value is set. The monitor display changes
to the black colour and the upper limit value setting is cancelled.