Maeda MC405C-3 - Moment Limiter Functions; Overload Warning; Working Envelope Restriction Warning

Mini-Crawler Crane M A E D A Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR)
1/2019 MC405C-3 4-79
Moment Limiter Functions
Overload Warning
Fig. 4-204
Fig. 4-205
1. Safety Zone ("Actual load" is less than 90 %
of the "rated total load")
• Green of the working status lamp lights up.
• The LED lights up in green if the load
factor is less than 90 %.
2. Pre-Warning ("Actual load" is 90 to less
than 100 % of the "rated total load")
• Yellow of the working status lamp lights up.
• The LED lights up in yellow if the load
factor is 90 to less than 100 %.
• The alarm bleeps.
3. Limit Warning ("Actual load" is 100 % or
higher than the "rated total load")
• Red of the working status lamp lights up.
• The LED lights up in red if the load factor is
100 % or higher.
• The alarm bleeps continuously.
• The hazardous operation of the boom
stops automatically.
• Voice message of "Overloading" is heard.
• "Load factor 100 % or more" LED (yellow)
lights up.
4. Clearing Limit Warning Auto Stop
If the system stops automatically, promptly
perform the recovery operation caused by
overloading.
For more information on recovery
operations, see "Recovery Operation After
Auto Stop" on page 4-70.
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 memorised even if the
starter switch is turned to the OFF position.
NOTICE: For more information on how to set the
value for working envelope restriction, see
"Descriptions of Switches on Moment Limiter
Display" on page 4-73.
When the working envelope has been set, the
restriction will be as follows.
Fig. 4-206
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.
Red
(ON with load factor of 100 %
or more)
Yellow
(ON with load factor of 90 to
less than 100 %)
Green
(ON with load factor of less than
90 %)