Furukawa Unic URW376C4U -T Series, Operation & Maintenance Manual

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DESCRIPTION OF EACH CONTROL DEVICE
Check the following before starting crane operation.
If found something wrong with the turn over prevention device, contact with a UNIC authorized
service shop as soon as possible because it will not function as a safety device.
1
Check that the continuous alarm sound
(bee••••ee) of the turn over prevention
device is issued before setting up outriggers.
(Keep always the “ON-OFF” switch for alarm
buzzer turning ON.)
2
By following procedures for setting up
the outriggers on the ground, rotate the
outriggers to secure them with the lock pins
at this time, allow the outriggers to be fully
retracted without setting them up on the
ground.
3
Through the hole on the side of opera-
tion panel, depress the “ZERO RESET”
switch in the control box of turn over preven-
tion device mounted inside for 1 second.
★
When the zero-point adjustment has suc-
cessfully been completed, all the lamps for
self-diagnosis light for 2 seconds and the
overturn alarm buzzer will stop sounding for
2 seconds.
After that, “ RUN ” lamp (green) lights and
lamps of “ ch. A ” through “ ch. D ” blink.
In addition, the overturn alarm buzzer makes
a continuous sound.
4
Confirm that the alarm buzzer stops
sounding when the outriggers have been
set up on a solid and level ground.
(Set them up so that the crane body can be posi-
tioned at approx. 2in (50mm) off the ground.)
Check at this time that lamps of “
RUN ” and
“ ch. A ” through “ ch. D ” among the self-diag-
nosis lamps in the control box of turn over
prevention device lights or blinks.
bee ・ ・ ・ee
“ZERO RESET” switch
Detailed illustration of
turn over prevention device control box
Self-diagnostic
lamp display
Approx. 2in (50mm)