DEMAG DC-II Operating And Maintenance Instructions Manual page 154

OPERATING AND MAINTENANCE INSTRUCTIONS
Display
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Upper limit position
reached, no lifting
Lower limit position
reached, no lowering
No travel
8.4 Warning messages
In general, all warning messages are generated by comparison of the actual and theoretical
speed. There may be various causes for differences in speed:
•
incorrectly adjusted slipping clutch;
•
binding brake or
•
dirty or defective speed sensor.
These causes may result in frequent warning messages. Various measures must be taken to
eliminate the warning messages:
•
clean the speed sensor with compressed air (for example, dirt accumulation on the photo
cell);
•
check and, if necessary, adjust the slipping clutch;
•
check and, if necessary, adjust the brake air gap.
154
Malfunction or
Possible cause
event
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Upper limit switch actuated.
Lower limit switch actuated.
Button lock
"Left" and "Right" buttons that are
actuated simultaneously.
Invalid controller signals.
8 TROUBLESHOOTING
Solution
Operating status: Lowering V1
Operating status: Lifting V2
Operating status: Lowering V2
Operating status: Lifting start-up
Operating status: Lowering start-up
Limit position reached. Lower.
Limit position reached. Lift.
Release buttons and press only one.
Strong electric interference.