Malfunctions during crane operation
14.4 Finding and eliminating malfunctions
14 - 18 3 302 633 en Operating Instructions GMK5250L
27.09.2017
Telescoping function not
working
Function disabled by CCS If necessary, acknowledge
error once and briefly
turn off the ignition – if
error persists, notify
Manitowoc Crane Care
Fuse is blown Replace blown fuse;
à p. 14 - 63
Telescoping not possible,
or only at low speed
Speed limited Increase limit;
à p. 10 - 123
Telescoping cannot be
switched off
CCS malfunction Emergency stop switch;
à p. 14 - 1
The main boom can no
longer be telescoped; the
telescoping cylinder can
no longer be moved
The hydraulic supply is inter-
rupted
Retract the telescopic sec-
tion by means of mechan-
ical emergency operation;
à p. 14 - 26
No response to control
lever movements
CCS malfunction for operat-
ing elements in the crane cab
Unrig using hand-held
control;
à p. 14 - 41
Malfunction Cause Remedy
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