Maeda MC-305C-2 - Page 96

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[2] WORKING ENVELOPE RESTRICTION WARNING
When the working envelope gets close to the set restriction value, a warning is issued to notify the
operator and people around of the situation.
The last status of the set value for the working envelope restriction is memorized even if the starter switch
is turned to the OFF position.
NOTES
See “Operation 1.6.4 [1] Descriptions of Switches on Moment Limiter Display Unit” for how to set the
value for working envelope restriction.
When the working envelope has been set, the restriction will be as
follows.
1. SAFETY ZONE
• The appropriate working envelope restriction LED (orange)
lights up.
• Green of the working status lamp lights up.
2. PRE-WARNING
• The appropriate working envelope restriction LED (orange)
lights up.
• The alarm bleeps intermittently.
3. LIMIT WARNING
• The appropriate working envelope restriction LED (orange)
lights up.
• Red of the working status lamp lights up.
• The alarm bleeps continuously.
• The hazardous operation of the boom stops automatically.
[3] OVER HOIST DETECTOR
CAUTION
Pay attention to the distance between the hook and boom when raising the hook.
Extending the boom also raises the hook.
Always check the hook height when extending the boom.
When you overwind the hook when raising the hook or extending
the boom,
• The “Overwinding” LED (red) flashes.
• The alarm bleeps continuously.
• The hook raising and boom extending operation stop
automatically.
• The voice saying “hook is overwinded” is heard.
In case of auto stop, immediately perform the recovery operation.
Perform hook lowering and boom retracting operations as recovery
operations.