Operator’s Manual
10
4.3Weight status bar
The weight percentage status bar indicates the relationship between the actual load weight and the
rated load weight during the crane operation and the weight percentage value is subject to the relationship
changes.
Green zone: safe range （weight percentage0-90%）
Yellow zone: pre-warning range （weight percentage 90-100%）
Red zone: over-load warning range （weight percentage exceeding100%）
4.4 Indicator light
Prewarning light
This yellow prewarning light comes up when the load on the machine amounts to more than 90%
of the respective nominal carrying load, which indicates that an overload situation is
immediately pending.
For the operator, this means that the machine work can continue only with the greatest amount of
caution
Overload warning light
This red Overload warning light indicates to the machine operator that an overload condition
has occurred. It lights up when the crane load has reached 100% of maximum load carrying
capacity permitted for the current operating status. The acoustic alarm sounds. The
load-moment-increasing crane movements are switched off at the same time
A2B switch lamp
This red warning light lights up when the heavy bob and spreader of A2B switch meet each
other and are hoisted. In the meanwhile, the buzzer alarms, which indicates the hook block has
arised the height maximum. Combining with the electric system, the crane movements from
hoisting and extending boom to luffing down are stopped. Please check A2B switch before operating the
crane in order to prevent human body and the crane from being injured.
Attention: Since A2B switch signal does not input into LMI system, this A2B switch lamp is used
invalid.
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