Malfunctions during crane operation
14.3 Warning and error messages
14 - 6 3 302 736 en Operating manual
GMK4090
xx.xx.xxxx
Pre-tension counterweight (early warning)
The pre-tensioning pressure is at the lower limit – if the pre-tensioning pres-
sure continues to drop, the slewing is disabled.
• Pre-tension the counterweight; à p. 12 - 108.
Pre-tension the counterweight
The pre-tensioning pressure is too low.
• Pre-tension the counterweight; à p. 12 - 108.
Slewing disabled by counterweight
The pre-tensioning pressure is too low or the counterweight is not com-
pletely lifted.
• Pre-tension the counterweight; à p. 12 - 108.
Reduction of slewing speed switched off
– Blue – information
The slewing speed is not reduced automatically.
– Red – warning
The maximum permissible slewing speed stated in the
Lifting capacity table
for the current loading case has been exceeded.
There is a risk of accidents – slowly reduce the slewing speed to a permis-
sible value and where possible engage the reduction of slewing speed, to
prevent further cases where the speed in exceeded;
à p. 11 - 119.
Vehicle brake
• Stop the truck crane immediately and check the pressure in the brake cir-
cuits;
à p. 5 - 10.
Emergency stop switch actuated
à Emergency stop switch, resetting, p. 4 - 20
This section does not include all messages. Symbols described for driving
may also be displayed;
à Warning messages on the CCS display, p. 8 - 13.
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