Manitowoc Grove GMK4100L-1

Malfunctions during crane operation
14.4 Troubleshooting
14 - 18 3 302 690 en Operating manual
GMK4100L-1
23.11.2017
14.4.7 Malfunctions on the slewing gear
Telescoping cannot be
switched off
Malfunction in crane control Emergency stop switch;
à p. 10 - 12
Operation with the
teleautomation menus
is blocked
Diverse errors, e.g. length
indicator failed
Retract main boom with
the emergency program;
à p. 14 - 31
The main boom can no
longer be telescoped; the
telescoping cylinder can
no longer be moved
The hydraulic supply is inter-
rupted
Inform
Manitowoc Crane
Care
No response to control
lever movements
CCS malfunction for operat-
ing elements in the crane cab
Unrig using hand-held
control;
à p. 14 - 45
Malfunction Cause Solution
Malfunction Cause Solution
Slewing gear not func-
tioning
Slewing gear off, lamp in
button lights up dimly
Switch on the slewing
gear;
à p. 11 - 116
Superstructure locked Unlock superstructure;
à p. 11 - 15
Dead man's switch not
actuated.
Press dead man's switch
Emergency stop switch on
à Resetting the emergency
stop switch
, p. 4 - 19
Control unit fuse blown Replace the blown fuse;
à p. 14 - 73
Control unit faulty, error
message is displayed
Acknowledge error mes-
sage once;
à p. 14 - 7 – if
error persists, notify
Manitowoc Crane Care
Enter RCL code for 0° to the
rear
position
Enter RCL code for a slew-
ing range
Slewing function not
working
Enter RCL code for
0° to the
rear
position or 180° to the front
position.
Confirm rigging mode for
a slewing range
Function disabled by CCS If required, acknowledge
error message once and
briefly turn off the ignition
– it if occurs again, notify
Manitowoc Crane Care