Malfunctions during crane operation
14.5 Emergency operations and programs
Operating Instructions GMK5250L 3 302 633 en 14 - 31
27.09.2017
Determining the
type of error
• Check which emergency program procedure is suitable for the current
error:
– If the display (1) shows no value, there is an
error on the length indicator of the
CCS
crane control system.
– If the display (2) shows no value, there is an
error on the length indicator of the
RCL
rated capacity limiter.
• If no values are shown on displays (1)
and (2) you must not start the telescoping
process. Contact
Manitowoc Crane Care.
– If a symbol (3) is violet, there is an error at
the proximity switch.
The symbols (4) and (5) are active. After selec-
tion and confirmation, locking or unlocking is
performed immediately.
s
G
Risk of damage to the telescoping mechanism!
Ensure that you always have an overview of the current status of the tele-
scoping mechanism before you initiate locking or unlocking.
In emergency mode, there is no monitoring of prerequisites – the function
is performed immediately after pressing the button.
G
Risk of damage to the telescoping mechanism!
Never telescope the main boom if errors exist simultaneously in the length
indicators of the crane control system
CCS and the rated capacity limiter
RCL.
It would then not be possible for you to monitor operations, and compo-
nents in the main boom could be damaged, or a situation could arise in
which the main boom can no longer be extended or retracted.
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