Maeda MC815C, Operation Manual, Page: 133 / 426

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[2] WORKING RADIUS LIMITER ALARM
When the boom is approaching the predetermined working radius limit, the alarm goes off to alert
the operator and people around the machine.
The set values for the working radius limit will remain memorized even after the starter switch is
set to the “OFF” position.
When the working radius limit is specified, the machine
operation is as follows:
1. Safety area
• The indicator lamps of the respective working radii
illuminate in orange.
• The tricolor revolving light illuminates in green.
2. Warning alarm
• The indicator lamps for the respective working ranges
blink in orange.
• The alarm generates an intermittent buzzer sound,
“peep, peep”.
• The tricolor revolving light illuminates in green.
3. Limit alarm
• The indicator lamps for the respective working ranges
blink in orange.
• The tricolor revolving light illuminates in yellow.
• The alarm generates continuous sound “peep”.
• The alarm buzzer operates only when the operation
lever is operated.
• Operation of the boom’s danger side stops
automatically.
[3] OVER HOIST DETECTOR
CAUTION
When winding the hook, be careful of clearance between the hook and boom.
When the boom is extended, the hook is also wound up.
Be sure to always check the hook height while the boom is extended.
If the hook height becomes excessively high while it is
wound or the boom is extended, the following occur:
• The “OVER WINDING” detection indicator lamp blinks in
red.
• The alarm generates continuous sound “peep”.
• The ongoing operation, hook winging or boom extension,
automatically stops.
When an automatic stop occurs, immediately recover from
the stop.
To resume the operation, unwind the wire rope to lower the
hook, or retract the boom.