Malfunctions during crane operation
14.4 Troubleshooting
14 - 22 3 112 993 en Operating manual GMK 6400
12.07.2013
14.4.12 Troubleshooting on the RCL
This section contains general malfunctions which are not displayed on the
RCL control unit as well as malfunctions which prompt an error display on
the
RCL control unit.
RCL programme version
Always note down the number of the programme version after a malfunc-
tion occurs and before notifying Manitowoc Crane Care.
• If required, open the main menu ö .
The display (1) indicates the programme version.
General
malfunctions
G
Risk of accident
Immediately stop operating the crane if an error message is displayed.
The RCL may only be repaired by trained and qualified personnel.
G
Risk of accident by faulty or overridden RCL
In the event of a faulty RCL, first try to correct the error with the information
in this section. Only override the RCL if it becomes absolutely necessary in
order to lower the load in the event of an emergency.
Do not carry out any movements which increase the load moment in the
event of a faulty or overridden RCL.
If the RCL is overridden, the crane operations are not monitored and no
shutdown procedures are initiated when leaving the working range.
Malfunction Cause Solution
RCL not working – dark dis-
plays, no buzzer tone
Power supply not switched on Switch on the ignition
Fuse F2/6 blown Replace blown fuse;
à p. 14 - 6
Fuse RCL F6 blown Replace blown fuse;
à p. 14 - 11
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