Maeda MC285C-3 - Number of Falls Change; Outrigger Extension Detection; Moment Limiter Error Display

M A E D A Mini-Crawler Crane Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR)
1/2019 MC285C-3 4-67
Number of Falls Change
DANGER!
• Stop crane operations before changing the
number of falls using the monitor.
Changing the number of falls during crane
operations may cause an unexpected
accident.
• Be sure to match the number of falls
display of the moment limiter with the
actual number of falls before performing
crane operations. Otherwise, a serious
accident may be caused.
For wire rope, safe load per rope part is
determined.
Determine the number of falls according to the
maximum hoisting load.
Be sure to match the actual number of falls of the
hook with the values of number of falls displayed
on the moment limiter.
This machine is equipped with a hook that
serves for both 4 and 2 wire ropes as standard
specifications.
For the set value of the number of falls, the last
state is memorised when the starter switch is
turned to the “OFF” position.
See “Number of Falls Change” on page 4-14 for
the change of the number of falls.
Fig. 4-181
Outrigger Extension Detection
The extension of the outriggers is detected by
limit switches mounted on each of the four
outriggers. The rated total load changes based
on outrigger extension.
Moment Limiter Error Display
When an error is sensed by the boom angle
sensor, boom length sensor, pressure sensor or
when a circuit is opened, the moment limiter
displays an error code on the monitor to notify
the operator of the error.
Stop using the crane immediately if an error
code is displayed. See “Error Codes” on page
5-95 to resolve the problem.
Working status lamp states
Colour
Status
States
All
colours
Flashing
･For three seconds after
starting
Red
Flashing
･The load factor is 100% or
greater.
･Boom is within the slewing
prohibited range while in
multimode.
･The hook is being stowed.
･The boom is being stowed.
･The moment limiter override
switch is enabled.
Yellow
Flashing
･The load factor is 90% or
more but less than 100%
(Note that if the load factor
exceeds 100%, the lamp will
continue to flash in red even
when it drops below 100%,
unless the load factor is first
reduced to below 90%.)
･The crane is stopped due to
operating range restrictions.
Green
Flashing
･The load factor is less than
90%.
-
Off
･In travel mode (with travel
lever pulled up)
If the working status lamp is subject to multiple
states, illumination takes priority, as follows:
Flashing red > Flashing yellow > Flashing green