Operating Instructions MxxMA-MxERA Three-phase AC ... - Lenze

9
Troubleshooting and fault elimination
Fault
Incorrect direction of
rotation of the motor,
correct display on the
controller
Motor rotates normally
but does not generates the
expected torque
Motor rotates in one
direction at maximum
speed in an uncontrolled
manner
Motor rotates slowly in
one direction and cannot
be influenced by the drive
controller
Unsteady running
Vibrations
Cause
Motor cable polarity is reversed
Encoder cable polarity is reversed
Motor cable interchanged cyclically
Motor cable interchanged cyclically
Polarity of encoder cable reversed
Polarity of motor cable and encoder
cable reversed
Shielding of motor cable or resolve
cable inadequate
Gain of the drive controller too high
Insufficiently balancing of coupling
elements or machine
Inadequate alignment of drive train
Loose fixing screws
Remedy
Check and correct polarity
Connect the phases at the motor cable connection correctly
Check motor connection and, if necessary, correct it
Check encoder connection and, if necessary, correct it
Check the polarity and correct it
Check shielding and earth connection
Adapt gain of the controller (see operating instructions for
drive controller)
Rebalance
Realign machine, if necessary, check foundation
Check screwed connections and tighten them if necessary
Running noises Foreign particles inside the motor Repair by manufacturer if necessary
Bearing damage
Surface
Overload of the drive Check overload and reduce through longer acceleration
temperature > 140°C
times, if necessary
Check winding temperature
Heat dissipation impeded by dirt Clean surface and cooling ribs of the drives
deposits
58
BA 33.0005−EN 2.0