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[6] CHECKING OVER HOIST DETECTOR FOR OPERATION
Over hoist the hook block (1), and raise the hook with winch and
extend the boom, and verify that the buzzer sounds and an audible
message saying "Over hoisted" is spoken, the hook raising
operation and boom extending operation stop.
If these events do not happen, the over hoist detector may be
faulty.
If the alarm does not stop, the over hoist detector may be faulty or
the circuit may be open.
Ask us or our sales service agency for repair.
NOTES
If you do not hear the message from the speaker, check the
volume of the remote controller.
[7] CHECKING MOMENT LIMITER FOR OPERATION
If you find any abnormality with the moment limiter, immediately contact us or our sales service
agency.
1. Turn the starter switch to the “ON” position.
2. Check with the working status lamp. The red of the lamp lights up for 2 seconds and then the green
lights up.
3. Check the moment limiter display unit.
Verify that no error code is displayed at the “RATED TOTAL LOAD” display on the display panel.
4. Start the engine and operate the crane as follows to verify if the moment limiter properly displays the
value.
Crane Operation and Displayed Parameter
Value Displayed on
Moment Limiter
Displayed “boom length” with the boom length at minimum 3.7 m
Displayed “boom length” with the boom length at maximum 12.5 m
Displayed “working radius” with the boom length of “5.9 m” (2-row booms)
and boom angle of “57 °“
3.0 ± 0.1 m
Displayed “ACTUAL LOAD” when the weight of the known weight was
hoisted
Must be equal to the total weight of weight + rigging
Note that it may show some errors depending on the boom conditions.
Actual load
5. Operate the crane until the moment limiter display values indicate the boom length is "5.9 m" (booms (1)
+ (2)) and boom angle is "57 degrees", then measure the "boom angle" and "working radius.
If the measured value(s) differ from the moment limiter display value, contact us or our sales agency.
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