Malfunctions during crane operation
14.4 Troubleshooting
14 - 14 3 302 690 en Operating manual
GMK4100L-1
23.11.2017
Only the lowering func-
tion works
Lifting limit switch
approached, lamp lights up
Leave the shutdown
range and lower the hoist.
RCL shutdown, lamp lights up Leave the shutdown
range;
à p. 11 - 58
Control unit fuse blown Replace the blown fuse;
à p. 14 - 73
Lifting, lowering or high-
speed mode function not
working
Function disabled by CCS If required, acknowledge
error message once and
briefly turn off the ignition
– it if occurs again, notify
Manitowoc Crane Care
No lift function Control unit fuse blown Replace the blown fuse;
à p. 14 - 73
Lifting or lowering is
either not possible at all
or only at a low speed
Speed limited Increase limit;
à p. 11 - 125
Lifting or lowering func-
tion 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 - 45
Malfunction Cause Solution
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