Lenze g700 Planetary gearboxes with servo - Manual (Page 13)

Troubleshooting and fault elimination 7
EN
13 Lenze ¯ MA 12.0015 ¯ 1.0
7 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 runs, gearbox does
not
Gearbox is defective Inform Lenze Service
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
Inadequate heat dissipation Improve cooling air flow
Clean gearbox / motor
Loose fixing elements Vibrations Avoid vibrations
Motor too hot
Can only be evaluated by
measuring the surface
temperature:
¯
Non−ventilated motors
> 140 °C
¯ Externally ventilated or
self−ventilated motors
> 110 °C
Insufficient cooling air Ensure unimpeded circulation of cooling air
Preheated cooling air Ensure a sufficient supply of fresh cooling
air
Overload, with normal
mains voltage the current is
too high and the speed too
low Use larger drive (determined by power
measurement)
Rated operating mode
exceeded (S1 to S8 IEC/EN
60034−1) Adjust rated operating mode to the
specified operating conditions.
Determination of correct drive by expert or
Lenze customer service
Loose contact in supply cable
(temporary single−phase
operation!) Tighten loose contact
Fuse has blown
(single−phasing!) Replace fuse
Overload of the drive ¯ Check load and, if necessary, reduce by
means of longer ramp−up times
¯ Check winding temperature
Heat dissipation impeded by
deposits Clean surface and cooling fins of the drives
Motor suddenly stops and
does not restart Overload monitoring of the
inverter is activated ¯ Check controller settings
¯ Reduce load caused by longer
acceleration times
Incorrect direction of
rotation of the motor,
correct display on the
controller Motor cable polarity is
reversed Check the polarity and correct
Polarity of encoder cable
reversed
Motor rotates normally but
does not reach the expected
torque Motor cable interchanged
cyclically Connect the phases at the motor cable
connection correctly
Motor turns in one direction
at maximum speed in an
uncontrolled manner Motor cable interchanged
cyclically Check motor connector and, if necessary,
correct
Polarity of encoder cable
reversed Check encoder connection and, if necessary,
correct
Motor rotates slowly in one
direction and cannot be
influenced by the controller Polarity of motor cable and
encoder cable reversed Check the polarity and correct