Troubleshooting and fault elimination8
l
70
BA 12.0023−EN 6.0
8 Troubleshooting and fault elimination
If any malfunctions should occur during operation of the drive system, please check the
possible causes using the following table. If the fault cannot be eliminated by one of the
listed measures, please contact the Lenze Service.
Fault Possible cause Remedy
Drive does not turn
Voltage supply interrupted
Check connection
Incorrect electrical connection Check if nameplate matches voltage supply
Excessive load Reduce load
Check drive−machine assignment
Motor running, gearbox at
standstill
Fixing elements are missing or
defective
Check attachment
Gearbox is defective Contact Lenze Service
Clutch disengaged Engage the clutch
Unusual running noises
Overload Reduce load
Check drive−machine assignment
Damage in the gearbox or
motor
Contact Lenze Service
Excessive temperature
Overload Reduce load
Check drive−machine assignment
Insufficient heat dissipation Improve cooling air supply
Clean gearbox / motor
Insufficient lubricant Refill lubricant as specified
Loose fixing elements Vibrations Avoid vibrations
Shrink disc connection is
spinning
l Correct screw tightening
torque has not been
reached
– Insufficient number of
passes, not all screws are
tightened correctly.
l Machine shaft and hollow
shaft bore not sufficiently
degreased
l Wrong component part
dimensions
– Fits, roughnesses
l Yield point of machine
shaft material is too low
– Re > 300 N/mm
2
required
l Friction factors are too low
– Coefficients of friction m ³
0.15 required
l The shrink disc itself has
been degreased so that the
screws and the bevels are
dry. Due to incorrect
friction factors, the shrink
disc cannot be tightened
correctly.
Specifications for assembly, dimensions and
material not observed
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