DEMAG DC-Com 1, Руководство по эксплуатации

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9.4 Warning messages
In general, all warning messages are generated by comparison of the actual and theoretical speed. There may be
various causes for a difference in speed:
● incorrectly adjusted slipping clutch;
● a binding brake or
● a 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 (e.g. dirt accumulation on the photo cell);
- check and, if necessary, adjust the slipping clutch;
- check and, if necessary, adjust the brake air gap.
Fig. 73 Display examples
Item Display Malfunction/event Possible cause Remark
1 .1. SLIP LIFTING start-up: No
lifting.
No lifting with load.
A mains phase is missing or the motor is blocked. Check mains connection and fuse link; check connection
cable for interruption; check mains connector in the service
enclosure.
Chain hoist overloaded or undervoltage. Reduce load to the permissible load capacity. Ensure ap‐
propriate mains voltage.
2 .2. SLIP LIFTING V1: Cut-out
in the upper limit position.
Limit switch contact is no longer actuated. (-.) is displayed when the limit switches function correctly.
The slipping clutch acts as an emergency-stop device if
there is a malfunction.
Limit switch contact connection and operation must be in‐
spected by an experienced technician.
3 .3. SLIP LIFTING V2: Cut-out
in the upper limit position.
Fast lifting with load is
switched off.
Limit switch contact is no longer actuated. (-.) is displayed when the limit switches function correctly.
The slipping clutch acts as an emergency-stop device if
there is a malfunction.
Limit switch contact connection and operation must be in‐
spected by an experienced technician.
Chain hoist overloaded. Reduce load to the permissible load capacity.
4 .4. Defective internal data
memory.
Defective control system. Replace control system.
6 .6. No speed information. Hardware monitoring malfunction. Repeat lifting process; if the load does not move, have the
brake and control system checked by an experienced tech‐
nician.
7 .7. SLIP LOWERING start-up:
No lowering.
A mains phase is missing or the motor is blocked. Check mains connection and fuse link; check connection
cable for interruption; check mains connector in the service
enclosure.
8 .8. SLIP LOWERING V1: Low‐
ering is switched off, lower
limit position is not
reached. Cut-out in the
lower limit position
Chain blocked. Check chain entry point, replace chain, if required.
Limit switch contact is no longer actuated. (-.) is displayed when the limit switches function correctly.
The slipping clutch acts as an emergency-stop device if
there is a malfunction.
Limit switch contact connection and operation must be in‐
spected by an experienced technician.
9 .9. SLIP LOWERING V2: Low‐
ering is switched off, lower
limit position is not
reached. Cut-out in the
lower limit position
Chain blocked. Check chain entry point, replace chain, if required.
Limit switch contact is no longer actuated. (-.) is displayed when the limit switches function correctly.
The slipping clutch acts as an emergency-stop device if
there is a malfunction.
Limit switch contact connection and operation must be in‐
spected by an experienced technician.
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