Malfunctions during crane operation
14.4 Troubleshooting
Operating manual 3 302 690 en 14 - 23
GMK4100L-1
23.11.2017
14.4.16 Malfunctions on the CCS/RCL control units
14.4.17 Malfunctions when driving from the crane cab
If this table does not help to remedy the malfunction;
à Malfunctions in the transmission, p. 8 - 23,
à Differential lock malfunctions, p. 8 - 22,
à Malfunctions of the steering, p. 8 - 24.
Malfunction Cause Solution
Control unit not working Power supply not switched on Switch the ignition on
Fuse F1/4 blown Replace blown fuses;
à p. 14 - 73
Display is dark – LED flashes
blue
Ambient temperature too low Heat the crane cab
Display is dark – LED flashes
yellow
Ambient temperature too
high
Cool the crane cab
Display weak Ambient temperature too
high – brightness is reduced
automatically
The set brightness is restored
after cooling
Malfunction Cause Solution
The transmission, the dif-
ferential locks and the
separate steering do not
respond to the operating
elements – symbols grey
Parking brake applied Releasing the parking
brake;
à p. 13 - 18
Ignition key in driver's cab not
in position 1
Turn the ignition key in
the driver's cab to posi-
tion 1;
à p. 13 - 18
Button for separate steer-
ing has no function
Separate steering switched
off
à Switching on separate
steering
, p. 13 - 13
Error symbol is displayed
with differential locks or
separate steering
An illogical switching state
was recorded
If required, acknowledge
error message once and
briefly turn off the ignition
– it if occurs again, notify
Manitowoc Crane Care
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