Malfunctions during crane operation
14.4 Troubleshooting
14 - 30 3 112 993 en Operating manual GMK 6400
12.07.2013
Switch off sensor/
tachogenerator
For values measured twice, you can switch off the faulty sensor/tachogen-
erator in the case of an error and continue working with one sensor/tacho-
generator for a short time.
• Call up the error (1) for the faulty sensor/tachogenerator in the Errors sub-
menu, e.g. 1.02.1 for pressure sensor 2.
• Press button P once.
The faulty sensor/tachogenerator is switched off and the corresponding
error (1) is displayed, e.g. 1.02.8 for pressure sensor 2.
When the ignition is switched on again, the shutdown is cancelled and the
error occurs again, possibly with a different last digit, e.g. 1.02.5.
After switching off the faulty sensor/tachogenerator, you should check
whether the other sensor/tachogenerator is functioning correctly.
Checking the pressure sensor function
• Lift the hook block without a load.
• Check whether the display (1) indicates the approximate weight of the
hook block.
Checking the angle sensor function
• Set down the main boom on the boom rest.
• Check whether the display (1) shows an angle of 0°.
G
Danger due to RCL failure
Have the error resolved before the next crane job.
This allows the crane to still be unrigged without RCL monitoring if the sec-
ond sensor/tachogenerator fails.
G
Risk of accident from faulty functioning
After switching off the faulty sensor/tachogenerator, begin crane operation
only if the display of the remaining sensor/tachogenerator is correct.
This prevents the RCL from not switching off when leaving the working
range and the truck crane overturning as a result.
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