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9-1
9. DESCRIPTION OF EACH CONTROL DEVICE
Overwinding alarm
Turn ON the voice switch before starting
crane operation.
If the voice alarm sounds while the hook is
being hoisted up or the boom is being extend-
ed, stop the crane operation immediately and
lower the hook or retract the boom.
2.
◆
Operating procedures
•
When the voice switch is turned OFF, overwinding alarm will not
function even if the hook has been overwound.
Be sure to turn the voice switch ON before starting crane work and
check that the voice alarm sounds every time when the weight for
overwinding alarm is lifted up to the detector.
•
Since the length of wire rope hanging the weight is specified by laws
and regulations concerned, do not make it short at random.
•
The alarm will sound even if any of electric wires connected to the
overwinding detector at the boom top is broken. In this case, ask a
UNIC service shop for repair.
OFF
ON
Voice switch
Cord reel
Overwinding detector
Weight for over-
winding alarm
1.
◆
Function of overwinding alarm
The device automatically makes an alarm
sound to warn that the wire ropes are being
overwound when the hook comes close to the
boom top.
Remarks
All the voice messages will not sound when the
voice switch has been turned OFF.
In normal operation, turn ON the voice switch.
CAUTION
Содержание URW370C4U Series
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