Lenze m850 User Manual

Diagnoscs and fault eliminaon
Malfuncons
If faults occur during the operaon of the drive, the table below helps you to idenfy the
causes. If it is not possible to remedy the fault using the measures listed, please contact the
Lenze service department.
Error Possible causes Remedy
Motor too hot
Can only be evaluated by measuring the surface
temperature:
•
Non-venlated motors >140 °C
•
Externally venlated or self-venlated motors
> 110 °C
Insucient cooling air, blocked air ducts. Ensure unimpeded circulaon of cooling air
Preheated cooling air Ensure a sucient 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 operang mode (S1 to S8 IEC/EN
60034-1) exceeded
Adjust rated operang mode to the specied
operang condions. Determinaon of correct
drive by expert or Lenze customer service
Loose contact in supply cable (temporary
single-phase operaon!)
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 mes
Check winding temperature
Heat dissipaon impeded by deposits Clean surface and cooling ns of the drives
Heat dissipaon hindered by thermally
insulated aachment
Note the cooling eect of the mounng ange
during project planning
Motor suddenly stops and does not restart Overload monitoring of the inverter is acvated Check inverter sengs
Reduce load caused by longer acceleraon
mes
Incorrect direcon of rotaon of the motor,
correct display on the inverter
Motor cable with reverse polarity Check and correct polarity
Polarity of encoder cable reversed
Motor rotates normally but does not reach the
expected torque
Motor cable interchanged cyclically
Not all motor phases connected
Connect the phases at the motor cable
connecon correctly
Motor turns in one direcon at maximum speed
in an uncontrolled manner
Motor cable interchanged cyclically Check motor connecon and, if necessary,
correct
Polarity of encoder cable reversed Check encoder connecon and, if necessary,
correct
Motor slowly rotates in one direcon and is not
inuenced by the inverter
Polarity of motor cable and encoder cable
reversed
Check and correct polarity
Irregular running Insucient shielding of motor or resolver cable Checking shielding and earth connecon
Inverter gain too large Adjust the gains of the controllers (see
operang instrucons for the inverter)
Vibraons Insuciently balanced coupling elements or
machine
Rebalance
Inadequate alignment of drive train Realign machine unit, check foundaon, if
necessary.
Loose xing screws Check and ghten screw connecons
Running noises Foreign parcles inside the motor Repair by the manufacturer, if necessary
Bearing damage
Diagnoscs and fault eliminaon
Malfuncons
30

Lenze m850 Specifications

General

Brand	Lenze
Model	m850
Category	Servo Drives
Language	English