Furukawa Unic URW376C4U -T Series, Operation & Maintenance Manual

Page: 52 / 156

9-16
DESCRIPTION OF EACH CONTROL DEVICE
★
Do not carry out “zero point adjustment” for turn over prevention
device after the outriggers have been set up.
Depression of “ZERO RESET” switch in this condition, the “zero point
adjustment” does not complete successfully which in turn the turn over
prevention device will be in failure so that crane operation of winding-
up hook, extension of boom, lowering boom, and slewing boom cannot
be
possible.
In this case, store the crane by following the step 1 illustrated on page
9-20, “How to release when turn over prevention device” is found to be
out of order, then store the outriggers to depress the “ZERO RESET”
switch again.
★
Although in case where the “zero point adjustment” has been com-
pleted, the “RUN” lamp fails to be lit, or if lamps of “ch. A” through “ch.
D” are blinking even after the outriggers have been set up right, ask a
UNIC authorized service shop immediately for inspection and repair as
the reaction force detector may be out of order.
★
After the “zero point adjustment” has been completed right, if the
“ERR” lamp blinks for only 5 seconds and the alarm buzzer makes an
intermittent sound (Beep, Beep) at the same time when the “RUN” lamp
lights, it indicates that the reaction force detector should be replaced.
Although the reaction force detector can be used for some time, ask a
UNIC authorized service shop as early as possible for repair.
★
In case where the “ERR” lamp in the control box of turn over pre-
vention device is blinking, the alarm buzzer makes a brief intermittent
sound (Pi, Pi, Pi • • • ).
★
Since this indicates that the turn over prevention device is in trouble,
ask a UNIC authorized service shop immediately for inspection and
repair.
CAUTION