Troubleshooting And Fault Elimination - Lenze g500 Series Mounting Instructions

8

Troubleshooting and fault elimination

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
Drive is not running
Motor is running, but
gearbox is not running
Unusual running noises
Excessive temperature
Vibrations, noise
Shrink disc connection is
spinning
Oil is leaking
Oil discharge at the gearbox
ventilation unit
66
Possible cause
Voltage supply interrupted
Faulty electrical connection
Excessive load
Coupling components are missing or
defective
Gearbox is defective
Clutch disengaged
Overload
Damage to the gearbox or motor
Overload
Inadequate heat dissipation
Lack of lubricant
Loose fixing elements
¯ Correct screw tightening torque has not
been reached
– Insufficient number of passes, not all
screws are tightened correctly.
¯ Machine shaft and hollow shaft bore
not sufficiently degreased
¯ Wrong component part dimensions
– Fits, roughnesses
¯ Yield point of machine shaft material is
too low
2
– Re > 300 N/mm required
¯ Friction factors are too low
– Coefficients of friction m ³ 0.15
required
¯ 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.
Wrong oil level for the applied mounting
position
Initial insignificant leakage at the shaft
sealing ring
Overpressure due to lacking ventilation
Overpressure due to polluted ventilation
Worn−out shaft sealing rings
Cover / flange screws are loose
Incorrect oil level for the mounting position
applied and/or incorrect position of
ventilation unit
Remedy
Check connection
Check that supply voltage
matches nameplate data
Reduce load
Check drive−machine
assignment
Check mounting
Inform Lenze Service
Engage the clutch
Reduce load
Check drive−machine
assignment
Inform Lenze Service
Reduce load
Check drive−machine
assignment
Improve cooling air flow
Clean gearbox / motor
Top up lubricant according to
regulations
Tighten fixing elements
Specifications for assembly,
dimensions and material not
observed
Check mounting position
(see nameplate) and oil level
Optimum sealing conditions
only develop after the run−in
period
Install ventilation according
to the mounting position
Clean ventilation
Change shaft sealing rings
Check that the fixing screws
are tightly fastened.
Continue to monitor the
gearbox
Mounting position (see
nameplate)
Check oil level^ 59
Check position of ventilation
unit ^ 50
Use oil compensation
reservoir
Lenze ¯ MA 12.0014 ¯ 5.1