Malfunctions during crane operation
14.4 Finding and eliminating malfunctions
14 - 20 3 302 633 en Operating Instructions GMK5250L
27.09.2017
14.4.8 Malfunctions on the counterweight hoist unit
Slewing only possible in
one direction
Shutdown angle of a limited
slewing range reached (addi-
tional equipment).
Enter the RCL code for a
slewing range of 360°
(
Standard) or reduce the
working radius (
MAXbase)
or slew in the opposite
direction to leave the
shutdown angle
Slewing cannot be
switched off
CCS malfunction Emergency stop switch;
à p. 14 - 1
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
Malfunction Cause Remedy
Counterweight hoist unit
is not working
Emergency stop switch on
à Resetting the emergency
stop switch
, p. 4 - 22
Fuse is blown Replace blown fuse;
à p. 14 - 63
Function disabled by CCS If required, acknowledge
error message once and
briefly turn off the ignition
– it if occurs again, notify
Manitowoc Crane Care
Error symbol (!) is
displayed
Electronic system has
detected an electrical or logi-
cal error
Lifting cylinder exten-
sion/retraction function
not working
Superstructure in the
interme-
diate position rigging range
Slew to the Move lifting
cylinders
or Lift/lower coun-
terweight
or position
à p. 11 - 85
Extend lifting cylinder not
working
Superstructure outside of
rigging range
Slew into the rigging
range
Counterweight rigged and
Move lifting cylinders position
reached
Slew to
Lift/lower
counterweight position
Counterweight unrigged and
Lift/lower counterweight posi-
tion reached
Slew to
Move lifting
cylinders
position
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