Frequently Asked Service Questions

Find answers to frequently asked questions regarding gear units and motors. Whether you're experiencing issues such as oil leaks, high temperatures, unusual noises, or increased vibrations, our comprehensive FAQs provide step-by-step guidance to help you troubleshoot and resolve common problems. Additionally, we address inquiries about oil types and quantities, version changes, direction of rotation, different speeds, and more. With NORD Drivesystems' expertise and support, you can ensure the optimal performance and functionality of your drive systems.

Gear Units

  • Check the oil quantity
  • Check the seal and replace as necessary
  • Has the transport securing device of the vent been removed?
  • Has the gear unit been mounted in the correct version (see operating instructions B1000)?
  • Check the installation location (impermissible ambient temperature, for example from direct sunlight, may lead to damages on the seals)
  • Check the ambient conditions (foreign particles in the immediate vicinity may lead to leakage at the seals)
  • Check the gear unit temperature (an impermissible gear unit temperature may lead to excess pressure in the gear unit and therefore leakage)
  • Were suitable radial shaft seals used for the application (e.g. use version with dust lip in dirty environments)?
  • Consult NORD DRIVESYSTEMS

  • Check the oil fill level
  • Check the oil condition (oil analysis)
  • Change the oil
  • Check the gear unit fastening/foundation
  • Contact NORD DRIVESYSTEMS

  • Check the gear unit fastening/foundation
  • Check the coupling if fitted
  • For frequency inverter operation, check the parameters
  • Contact NORD DRIVESYSTEMS

  • The oil type and quantity are stated on the type plate
  • The oil type and quantity are stated on the order confirmation
  • Contact NORD DRIVESYSTEMS

  • Swap two phases on the electric motor (Notice! Not possible with back stop option!)
  • Please contact NORD DRIVESYSTEMS in case of back stop option

  • Investigate the use of a frequency inverter
  • Change the gearing
  • Use a motor with a different number of pole pairs
  • Contact NORD DRIVESYSTEMS

Motors

  • Check the parameter settings in case of frequency inverter operation
  • Check the motor bearings and replace as necessary
  • Check the fan/fan cover
  • Contact NORD DRIVESYSTEMS

  • Check the parameter settings in case of frequency inverter operation
  • Check the motor bearings and replace as necessary
  • Check the motor mounting and modify as necessary
  • If a coupling is fitted between the motor and the gear unit, check the alignment and the coupling
  • Contact NORD DRIVESYSTEMS

  • Check the motor connection on the terminal board
  • Check the supply voltage and the control of the protective device
  • In the case of a brake motor, check the brake
  • In the case of a back stop option, check the direction of rotation
  • Contact NORD DRIVESYSTEMS

  • In the case of a brake motor, check the brake
  • Check the application with regard to heavy starting / design
  • Contact NORD DRIVESYSTEMS

  • Check the motor control or wiring
  • If possible, operate the motor in the delta circuit; if necessary check or adapt the design with regard to overload
  • Contact NORD DRIVESYSTEMS

  • Check the motor power supply
  • Check the motor connection
  • Check the application for excess load
  • In the case of a brake motor, check the brake function
  • Contact NORD DRIVESYSTEMS

  • Check the power supply
  • Check the fuse / motor protector
  • Check the design and modify as necessary
  • Check the motor windings
  • Contact NORD DRIVESYSTEMS

  • Check the fan
  • For frequency inverter operation, check the minimum frequency/speed. Install an external fan if necessary
  • Check the switching frequency for the operating mode of the motor and change the design as necessary
  • Check the design and change the required motor power as necessary
  • In the case of a brake motor, check the brake
  • Check the installation location with regard to cooling
  • Contact NORD DRIVESYSTEMS

  • Check the supply voltage to the brake
  • If the brake is controlled by a rectifier, check the rectifier
  • Measure the resistance of the brake coil
  • Check the air gap of the brake
  • Contact NORD DRIVESYSTEMS

Frequency Inverters, Motor Starters, and Field Distributors

  • Check the mains voltage and if necessary the control voltage (depending on the frequency inverter type)
  • If necessary return the frequency inverter to the manufacturer for testing

  • Determine the cause of the switch on block via parameter (P700[3]) and the manual

  • Set automatic starting in P428 to "On", note the information in the manual

  • Check the motor data and match them with those on the type plate as necessary
  • Check the motor and the motor cable
  • Reduce the load
  • Check the precise error message via P700[1] and use the further remedial measures in the manual
  • If necessary return the frequency inverter to the manufacturer for testing

  • Check the load and speed, if necessary allow the motor to cool down or use an external fan.
  • Check the thermistor resistance (TF≈200Ω/20C) and the connection
  • Bridge the thermistor input if it is not used

  • Increase the ramp time in P103
  • Use the V/f characteristic curve by setting parameters P211/212 to 0%
  • Use a suitable brake resistor
  • If necessary, adapt P217 (e.g. 200%)

  • Determine the error code from the flashing code of the DS LED or read it out from P700. Then determine the suitable remedial measure from the manual

  • Check the input voltage, one phase may be missing

  • Check the encoder connection and the direction of rotation via P735; change P301 as necessary

  • Check the BUS telegram from the external PLC