Service

• In case of operation with a frequency inverter, check the parameter settings and match the motor data with the name plate data
• Check the fan/fan cover (grinding noise, vibration, resonance)
• Check the motor bearings and replace as necessary
• Consult NORD DRIVESYSTEMS

• In case of operation with a frequency inverter, check the parameter settings and match the motor data with the name plate data
• Check the motor fastening and modify as necessary
• Check the motor bearings and replace as necessary
• If a coupling is fitted between the motor and the gear unit, check the alignment and the coupling, and align as necessary
• Consult NORD DRIVESYSTEMS

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

• In case of a brake motor, check the functioning of the brake
• Check the application with regard to heavy starting/design
• Check the motor monitor (temperature monitor, frequency inverter, fuse)
• Check the motor control or wiring (Star-Delta circuit)
• In case of operation with a frequency inverter, check the parameter settings and match the motor data with the name plate data
• Consult 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
• Consult NORD DRIVESYSTEMS

• If the drive does not have a back stop, swap two phases of the supply voltage by qualified personnel
• Consult NORD DRIVESYSTEMS

• Check the voltage supply of the motor
• Check the motor connection
• Check the application for excess load
• In case of operation with a brake, check the functioning of the brake
• Consult NORD DRIVESYSTEMS

• Check the voltage supply
• Check the fuse/motor circuit breaker
• Check the design and modify as necessary
• Check the motor winding
• Consult NORD DRIVESYSTEMS

• Check the fan and clean the fan cover as necessary
• For frequency inverter operation, check the minimum frequency/speed and install an external fan as necessary
• Check the switching frequency for the operating mode of the motor and change the design as necessary (impermissibly frequent switch-on may lead to motor overload) (see catalogue M7000)
• Check the design and change the required motor power as necessary
• In case of operation with a brake, check the functioning of the brake
• Check the ambient conditions and the mounting position with regard to cooling
• Consult NORD DRIVESYSTEMS

• Measure the contact resistance of the temperature sensor in the motor terminal box
• Consult NORD DRIVESYSTEMS

• Measure the contact resistance of the thermostat in the motor terminal box
• Consult NORD DRIVESYSTEMS

• Check the supply voltage of the brake
• If the brake is controlled via a rectifier, check the rectifier
• Measure the resistance at the brake coil
• Check the air gap of the brake/check the position of the brake
• Check the brake pad for wear
• Consult NORD DRIVESYSTEMS

For further information, refer to the operating instructions.

For further information, refer to our catalogue M7000

For further information, refer to our catalogue M7000.

For further information, refer to our catalogue M7000.

Get in touch with us via our service form or by phone.

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

• Check switch-on inhibit (P700[3])
• Ensure that no second enabling is active
• Check the enable signal in the information parameters (P708/P740)

Set automatic starting in P428 to "On". Pay attention to the information in the respective operating instructions

• Check the motor data and match it with the name plate as necessary
• Check the motor and the motor cable
• Reduce the load
• Check the precise error message via P700[1] and pay attention to any further remedial measures in the operating instructions
• If necessary, return the frequency inverter to NORD DRIVESYSTEMS for testing

• Check the motor’s load and speed (e.g. < 25 Hz). If necessary, allow the motor to cool down, reduce the load or use an external fan
• Check the ohmic resistance (e.g. TF ≈ 200 Ω/20 °C) and the PTC resistor connection

• Check the input voltage quality
• Check the motor data (P201–P208)
• Increase the ramp time in P103 as necessary
• Use a suitable braking resistor
• For "oscillating" applications, you can reduce the slip compensation (P212) or set a linear V/f characteristic curve by setting the parameters P211 and P212 to 0%
• Adjust the parameter P217 as necessary (e.g. 200%)
• You can adjust the disconnection mode in P108

• Determine the error code from the flashing code of the DS LED or read it out via parameter P700
• Afterwards, determine the suitable remedial measures from the operating instructions

Check the encoder connection and the direction of rotation via P735 and adjust P301 as necessary.

• Check the BUS telegram from the external PLC
• Check the telegram time-out in P513

EMC is a highly complex topic for which there is no general answer. EMC interference may occur in the control inputs (digital/analogue input, encoder, bus system), and may lead to unwanted signals, faults or even damage. In case of problems, contact a qualified EMC specialist.

General measures to avoid EMC:

• Proper shielding of the frequency inverter minimises electromagnetic interference
• Components for interference suppression such as filters, chokes and capacitors can reduce noise and electromagnetic emissions
• Use well-shielded high-quality cables, and minimise long cable lines
• Proper earthing minimises electromagnetic interference (e.g. TI 80_0019)
• The installation should be done according to the manufacturer’s instructions and the relevant standards (e.g. TI 80_0019, TI 80_0011)
• Separation of high-voltage and low-voltage cables
• The mains must be balanced
• Twisting of wires
• Cable ferrites can be used to reduce existing interference

• Check the system for faulty connections, insulation faults or defective devices
• Pay attention to the frequency inverter’s functional residual currents (TI 800_000000003)
• A or AC residual current protective devices are not permissible as protective devices. If necessary, retrofit to an all-current sensitive B(+) RCD (e.g. Doepke DFS 4B SK) (TI 800_000000003). Please observe the relevant regulations and standards.
• In IT networks, the frequency inverter’s jumper or DIP switch used for the functioning must be plugged/switched to IT. This partly deactivates the integrated line filter and reduces residual currents. EMC interference can thus enter the network unfiltered. Observe the operating instructions of the frequency inverter.

• A motor choke is inserted between the frequency inverter output and the motor.
• It can help to reduce electromagnetic interference, protect the motor against excessive voltage and current peaks, and avoid resonances.
• To reduce the motor cable’s interference signals
• Cable capacity compensation in case of long motor cables. An output choke should be fitted for motor cable lengths over 100 m/30 m (unshielded/shielded).

• There are input chokes and link circuit chokes (before the frequency inverter/in the link circuit)
• A mains choke protects the motor against any impact from the frequency converter, and improves the motor operation. For powers of 45 kW and higher, the general use of a mains choke is recommended
• EMC interference immunity; reduction of current peaks, voltage peaks and harmonics
• Increase of efficiency due to lower input currents
• Extension of the link circuit capacitors’ service life in the frequency inverter
• If the proportion of the installed inverter power exceeds 20% of the installed transformer power
• For very hard mains or capacitive compensation systems
• In case of frequent switching of large consumers connected in parallel
• When using contact rail systems, the use of a mains or link circuit choke is recommended

• A braking resistor on the frequency inverter is required if the motor is moved by external power sources (generator operation of the motor)
• Back-flowing current can cause frequency inverter faults
• The braking resistor absorbs excess power and dissipates it in the form of heat
• Particularly, in case of high motor inertia or fast braking, a braking resistor is often essential

You can use our application guide that describes the procedure of commissioning the drive-specific parameters (e.g. AG0100, AG0101)

• General information can be found in our instructions BU0040.
• Using our NORDCON parameterisation software. You need a parametrisation cable (e.g. SK TIE4-RS232-USB) or an Ethernet bus connection (frequency inverter/PC)
• Using a ControlBox or a ParameterBox, available as hand-held or bolt-on device (e.g. SK PAR-5H, SK TU5-CTR)
• Using our NORDCON App and the NORDAC ACCESS BT Bluetooth Stick
• For some frequency inverter models, an individual parameterisation can be carried out via integrated DIP switches and potentiometer. Please observe the operating instructions of the respective frequency inverter model

The SK 135E/175E series has an integrated RS232 interface. To use a hand-held ParameterBox, use a RS232/RS485 interface converter (SK TIE4-RS485-RS232, 275274603)

• As a general rule, a NORD frequency inverter can process a 0/4–20 mA or bipolar analogue signal
• This can be set in the parameters P400–P403 (input) and P418–P419 (output), and is described in the operating instructions of the frequency inverter
• You have to set an adjustment of the analogue input/analogue output
• For some frequency inverter models, you have to adjust a DIP switch for the V/I conversion (internal resistance of the analogue input/analogue output)
• For some frequency inverter models, an external converter (V/I converter 10 V 20 mA, 278910315) must be connected to the analogue output
• For the connection of a bipolar analogue signal to the unipolar analogue input of a frequency inverter, an external setpoint converter +/10 V (278910320) can be connected

• The ParameterBox was used as display of the internal PLC of the frequency inverter
• The frequency inverter’s PLC program may be faulty, or the PLC parameters may have been changed
• The display mode of ParameterBox P1003 was set to "PLC display". If you do not want this, you can reset it to default.

In parameter P535, you can configure that the motor temperature is calculated depending on the output current, the time and the output frequency (cooling). This may provide additional protection to the motor.

The device must be regularly connected to the supply network (approx. once a year) for at least 60 minutes. If the storage period of one year is exceeded, please look up the respective measures in chapter "Long-term storage" in the operating instructions of the frequency inverter.

There are various migration guides that can be used for transcoding (e.g.MI0500).

• You can find various BUS manuals in our documentation centre.
• You can find How-To videos on the topic of integration into BUS systems on YouTube
• There are various field bus files and standard modules for system integration available

The required parameters to be set depend on the application. The following is just a minimum example.

• Acceleration and deceleration times (P102/P103)
• Set minimum and maximum frequency (P104/P105). In case of too low speeds, the motor’s self-cooling (e.g. < 25 Hz) may not suffice.
• Set the motor data according to the motor name plate P201–P206
• Star Delta con. P207
• Automatic stator resistance calibration (P208) into P220 [=1] after entering all previous parameters, and with cold motor (approx. 15–25 °C)
• Parametrise control inputs P4xx
  
  • e.g. enable via digital input
  • e.g. setpoint via analogue input

The following is just an example, which may differ from your application.

• Acceleration and deceleration times (P102/P103). Select a long deceleration ramp as necessary.
• Set minimum and maximum frequency (P104/P105). In case of too low speeds, the motor’s self-cooling (e.g. < 25 Hz) may not suffice.
• Select the disconnection mode P108 "Voltage disable [=0]" to switch off the output signal without delay
• Set the motor data according to the motor name plate P201–P206
• Star Delta con. P207
• Automatic stator resistance calibration (P208) into P220 [=1] after entering all previous parameters, and with cold motor (approx. 15–25 °C)
• Set P211 and P212 to 0% to set a linear V/f characteristic curve
• Parametrise control inputs P4xx
• The flying start P520 [=1] is required to connect the FI to already rotating motors
• Use parameter P540 to avoid an unwanted rotation direction of the frequency inverter

• If the device is not visible upon connection establishment => Activate the location detection (error message: No device found)
• General failures => Delete pairing list (hold both buttons for > 4 s and release them)
• Upload (to the device) does not work => Check the LOCK sliding switch (in the "unlocked" position)
• The parameter file contained on the stick must have the explicit name "Dataset.ndbx"

Get in touch with us via our service form or by phone.