Troubleshooting / NORD inverter errors

NORD Inverter Error Codes

The error (E), warning (C) and switch-on inhibit (I) codes of NORD DRIVESYSTEMS NORDAC inverters, led by the SK 200E series with the SK 500E, SK 180E, SK 500P and SK 300P where NORD prints the same code: what each one means, the likely causes, the first checks, and how to log it so it stops coming back.

How errors show

SK 200E (NORDAC FLEX): the device state LED is visible from outside. Depending on the device it is one dual colour LED (DS, Device State) or two single colour LEDs (DS and DE, Device Error). Green means ready and mains voltage present; during operation a faster green flash shows the degree of overload.

Red means an error is pending, and the LED flashes once per error group number, for example 3 flashes for E003.

The DS LED also flashes green at 0.5 Hz when ready but not enabled, green at 4 Hz in switch-on inhibit, red and green alternately at 4 Hz for a warning (on sizes 1 to 3 at 1 Hz for a charging error), and shows green on with red flashing when the inverter is not ready because the STO voltage on DIN4 is missing.

The red BUS-E LED flashes at 4 Hz for a system bus monitoring error (P120 or P513, E10.0 / E10.9) and at 1 Hz for an external bus module error (time-out E10.2, module error E10.3). The SimpleBox shows an error as E plus the group number, for example E003. The exact message, group plus detail number such as 3.2, is in parameter P700 [-01]; this list writes it as E003.2.

Warnings show as C plus the number (Cxxx), cannot be acknowledged and disappear by themselves when the cause is gone or when the inverter goes into the error state; the current warning is in P700 [-02] and the last warning since power on in P766.

The reason for a switch-on inhibit ('Not ready', the I codes) is in P700 [-03] and can only be shown with the ParameterBox or the NORD CON software, not with the SimpleBox. The ParameterBox shows all messages in plain text. Fault memory: P701 keeps the last 5 faults.

P702 to P706 store the output frequency, output current, output voltage, DC link voltage and active parameter set at each of those faults, and P799 the operating hours. On a SimpleBox or ControlBox, select memory slot 1 to 5 and confirm with OK or ENTER to read it. Over a fieldbus P700 is sent as an integer that must be divided by 10 (20 means 2.0).

To acknowledge: when the cause is gone the SimpleBox error display flashes and the Enter key acknowledges it.

NORD also allows switching the mains off and on, a digital input programmed for acknowledgement (P420), removing the enable (if no input is programmed for acknowledgement), bus acknowledgement, or automatic acknowledgement P506, which acts 3 s after the fault can be acknowledged.

NORD warns never to set P506 = 6 together with P428 = 1, because after a fault such as an earth fault or short circuit the device would keep switching on again. SK 500E and SK 180E use the same scheme on the SimpleBox or ControlBox (codes in a table by group with details in P700 [-01] / P701).

On SK 500P the plug-on ControlBox SK TU5-CTR shows the detail directly (for example E001.1), the SimpleControlBox shows E001 and the ParameterBox the text; its DEV LED flashes red once per error group.

Safety first.
NORD: installation, maintenance and repair work may only be carried out when the device is disconnected from the voltage and at least 5 minutes have passed since the mains was switched off, because charged capacitors can hold a hazardous voltage for up to 5 minutes (the label on the device warns it is live for more than 5 minutes after removing mains voltage).

Before starting, check by measurement that all contacts of the power plug connectors or connection terminals are voltage free. A status LED that is not lit does not prove the device is disconnected and voltage free.

Always disconnect all poles of cable connections, and never unplug the device or power plug connectors while voltage is applied, because arcing can cause injury and damage. All work must be done by qualified personnel, and installation and commissioning by a qualified electrician.

The heat sink and other metal parts can exceed 70 °C. Depending on settings, the device and motor can start automatically when the mains is switched on or a fault is acknowledged (for example with automatic starting P428 or automatic acknowledgement P506), so clear and secure the danger area first.

After a circuit breaker trips, visually check all live components in that circuit for defects and flashover tracks and check the terminals before resetting it. Sources: BU0200 chapter 1 safety information and warning labels (pages 20 to 25), P506 notice (page 198), I000.5 notice (page 251).

The same 5 minute rule is printed in BU 0500 (page 25), BU 0180 (page 17), BU 0600 (page 20) and BU 0800 (page 18). Automatic starting warning on acknowledgement in BU 0600 (page 210). Follow lockout/tagout and your site's safe-work procedures, and check the manual for your exact model before you act.

Quick lookup

Errors switch the inverter off and stop the machine, so in OEE they are availability losses; warnings and switch-on inhibits block the next start.

Type a code or a word (overcurrent, overtemperature, mains, brake) to filter the list. Click a code for its causes and first checks. On the SK 200E the LED and the SimpleBox show the group (E003); the full code with its detail (E003.2) is in parameter P700. Each code's details name the NORD series that print it.

99 codes

CodeName
E001.0Inverter overtemp.
E001.1Intern. inverter temp
E002.0Motor overtemp.PTC
E002.1Motor overtemp.I²t
E002.2Ext Resistor Temp
E003.0Overcurrent I²t lim.
E003.1Overcurrent chopper I²t
E003.2Overcurrent IGBT
E003.3Overcurrent IGBTfast
E003.4Overcurrent chopper
E003.7Power limit input
E004.0Module overcurrent
E004.1Overcurrent measurem.
E005.0Overvoltage Ud
E005.1Mains overvoltage
E006.0Charging error
E006.1Mains low voltage
E007.0Mains Phase Failure
E007.1Phasefailure dc-link
E008.0Parameter loss (maximum EEPROM value exceeded)
E008.1Inverter ID error
E008.2Extern. EEPROM error
E008.3EEPROM KSE error
E008.4EEPROM intern. error (Database version incorrect)
E008.7EEPROM copy differs
E008.9EEP. Ctrlbox too small
E009ControlBox error/ SimpleBox error
E010.0Bus time-out
E010.1System-error option
E010.2Bus time-out option
E010.3System-error option
E010.4Init-error option
E010.5 / E010.6 / E010.7System-error option
E010.8Error option
E010.9Missing Option /P120
E011.0Control terminals
E011.1CU version
E012.0External Watchdog
E012.1Limit moto./Customer
E012.2Limit gen.
E012.3Torque limit
E012.4Current limit
E012.5Load monitor
E012.8Analog in. minimum
E012.9Analog in. maximum
E013.0Encoder error
E013.1Speed slip error
E013.2Disconnect. control
E013.3Slipfault encoder
E013.4HTL slip error
E016.0Motor phase failure
E016.1Magn. current watch
E016.2Change phase direct.
E017.0Faulty customer unit
E019.0Error parameter identification
E019.1Rotorposition
E019.2Rotorpos.North/South
E019.3Rotor position adjustment
E020.1Watchdog
E020.2Stack overflow
E020.3Stack underflow
E020.4Undefined opcode
E020.5Protected instruction
E020.6Illegal word access
E020.7Illegal instruction access
E020.8EEPROM error (Wrong flash checksum)
E020.9Memory Protection Error
E021.0NMI error
E021.1PLL error
E021.2ADU error
E021.3PMI error
E021.4Userstack Overflow
E090.0Extended error
E099.0System error
C001.0Inverter overtemp.
C002.0Motor overtemp. PTC
C002.1Motor overtemp. I2t
C002.2Ext resistor temp.
C003.0Overcurrent I2t lim.
C003.1Overcurrent chopper I2t
C003.5Torque limit
C003.6Current limit
C003.7Real power
C003.8Total current < > 0
C004.1Overcurrent measurem.
C008.0Parameter loss
C012.1Limit moto./Customer
C012.2Limit gen.
C012.3Torque limit
C012.5Load monitor
I000.1Volt. blocked by IO
I000.2Quick stop by IO
I000.3Volt. blocked by Bus
I000.4Quick stop by Bus
I000.5Enable at start
I000.8Right dir. locked
I000.9Left dir. locked
I006.0Charging error
I011.0Analog Stop

Each code: causes and first checks

E001.0: Inverter overtemp.

Hits OEE: Availability

What it means: The inverter temperature monitoring (heat sink) has measured a temperature outside the permitted range, too hot or too cold, and the inverter switches off.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print it as 'Overtemp. Inverter' (inverter heat sink). SK 200E LED: 1 red flash.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Ambient temperature too high or too low
  • Fan or control cabinet ventilation not working
  • Dirt on the device reducing cooling

First checks, in this order

  1. Bring the ambient temperature back into range (reduce it, or increase it if too cold).
  2. Check the fan or the control cabinet ventilation.
  3. Check the device for dirt and clean it.
  4. Read the current temperatures in P739.

E001.1: Intern. inverter temp

Hits OEE: Availability

What it means: The temperature monitoring inside the inverter has measured a value outside the permitted range, too hot or too cold, and the inverter switches off.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print it as 'Overtemp. FI internal' (interior of FI).

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Ambient temperature too high or too low
  • Fan or control cabinet ventilation not working
  • Dirt on the device reducing cooling

First checks, in this order

  1. Bring the ambient temperature back into range (reduce it, or increase it if too cold).
  2. Check the fan or the control cabinet ventilation.
  3. Check the device for dirt and clean it.
  4. Read the current temperatures in P739.

E002.0: Motor overtemp.PTC

Hits OEE: Availability

What it means: A motor temperature sensor has tripped: the motor PTC thermistor, the separate PTC input on terminals 38/39, or a KTY / PT1000 sensor on the analogue input (P400 = 48).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E: the motor PTC resistor has triggered. SK 200E LED: 2 red flashes.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor load too high
  • Motor running too slowly to cool itself
  • External motor fan missing or not working

First checks, in this order

  1. Reduce the motor load.
  2. Increase the motor speed.
  3. Fit an external motor fan, or check that the existing one works.
  4. Check the setting of P425.

E002.1: Motor overtemp.I²t

Hits OEE: Availability

What it means: The inverter has calculated an impermissible motor temperature from its motor I²t model, without a sensor.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E: only triggers if motor I²t monitoring (P535) has been programmed.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor load too high
  • Motor speed too low for the load

First checks, in this order

  1. Reduce the motor load.
  2. Increase the motor speed.
  3. Repeat the stator resistance measurement (motor data section of the manual).

E002.2: Ext Resistor Temp

Hits OEE: Availability

What it means: External braking resistor overtemperature: a thermostat on a digital input set to function 13 (P420/P480), for example on the braking resistor, has tripped and the input is low.[1][2][3][4][5]

Also on: Series: SK 200E, SK 180E. SK 500P and SK 300P print E002.2 as 'Overtemp. DIN': digital input function 13 'PTC resistor input' has triggered, check connection and thermostat. SK 500E lists this condition only as warning C002.2.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Thermostat on the braking resistor (or other monitored part) has tripped
  • Digital input reads low because of a connection or sensor problem

First checks, in this order

  1. Check the connections and the temperature sensor.
  2. Check the braking resistor for overheating.

E003.0: Overcurrent I²t lim.

Hits OEE: Availability

What it means: The inverter current limit (I²t) has been exceeded, for example more than 1.5 times rated current for 60 s: a continuous overload at the inverter output.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Overcurrent I²t-Lim.'. SK 200E LED: 3 red flashes.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor load too high
  • Blockage or overload in the machine
  • Rotary encoder problem: wrong resolution, defect or bad connection

First checks, in this order

  1. Reduce the motor load.
  2. Check the machine for blockage or overload.
  3. Check the encoder settings, the encoder and its connection.
  4. The current limit can be adjusted by changing the pulse frequency (P504).

E003.1: Overcurrent chopper I²t

Hits OEE: Availability

What it means: The brake chopper current limit (I²t) has been exceeded, for example more than 1.5 times rated current for 60 s.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500P and SK 300P print 'Overcurrent chopper'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Too much current through the braking resistor
  • Braking resistor values set wrongly

First checks, in this order

  1. Avoid overcurrent in the braking resistor.
  2. Check the braking resistor values in P555, P556, P557, and P554 if available.

E003.2: Overcurrent IGBT

Hits OEE: Availability

What it means: The drive is running above the power it can deliver: 220 % overcurrent in the output stage.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E describe it as 125 % monitoring with derating (power reduction).

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor load too high
  • Inverter power reduced by derating, for example at a higher pulse frequency
  • Brake chopper current too high
  • Very high peak loads or a blockage
  • Fan drive started into a turning fan without flying start

First checks, in this order

  1. Reduce the motor load.
  2. Check the available inverter power in the derating tables (for example at increased pulse frequency).
  3. Check for peak loads or a blockage.
  4. On fan drives, enable flying start (P520).

E003.3: Overcurrent IGBTfast

Hits OEE: Availability

What it means: Fast output stage monitoring: the drive is running above its possible power, 230 % overcurrent.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E describe it as 150 % monitoring with derating (power reduction).

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor load too high
  • Inverter power reduced by derating, for example at a higher pulse frequency
  • Brake chopper current too high
  • Very high peak loads or a blockage

First checks, in this order

  1. Reduce the motor load.
  2. Check the available inverter power in the derating tables (for example at increased pulse frequency).
  3. Check for peak loads or a blockage.

E003.4: Overcurrent chopper

Hits OEE: Availability

What it means: The brake chopper current is too high.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E: chopper overcurrent triggered twice within 50 ms.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Brake chopper current too high
  • Short circuit at the braking resistor, or braking resistance too low (SK 500E and SK 180E text)

First checks, in this order

  1. Avoid overcurrent in the braking resistor.
  2. Check the braking resistor and its wiring for a short circuit, and check that its resistance is not too low.

E003.7: Power limit input

Hits OEE: Availability

What it means: Input current too high: continuous overload at the inverter input. The inverter shuts down at 150 % overload within 60 s; higher loads or frequent overloads shorten that time.[1][4][5]

Also on: Series: SK 200E, SK 500P, SK 300P. SK 500P and SK 300P also have warning C003.7 'Real power' for the same input current condition.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor load too high
  • Blockage or overload in the machine
  • Mains voltage in the lower tolerance range, which raises the input current

First checks, in this order

  1. Reduce the motor load.
  2. Check the machine for blockage or overload.
  3. Check the mains voltage.

E004.0: Module overcurrent

Hits OEE: Availability

What it means: Short duration error signal from the power module.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Overcurrent module'. SK 200E LED: 4 red flashes.

Inverter response: Inverter switches off. NORD warns this error can shorten the service life of the device or even destroy it.

Likely causes

  • Short circuit or earth fault at the inverter output (motor cable or motor)
  • Optional braking resistor defective or wrongly sized
  • Optional motor choke defective
  • Motor cable too long
  • Devices with safe pulse block: cable resistance too high or voltage at the safe pulse block too low

First checks, in this order

  1. After isolating and waiting 5 minutes, check the motor cable and motor for a short circuit or earth fault.
  2. Check the optional braking resistor and motor choke.
  3. Check the motor cable length (SK 500E and SK 180E suggest an external output choke).
  4. Do not switch off P537 (pulse switch-off).

E004.1: Overcurrent measurem.

Hits OEE: Availability

What it means: The pulse switch-off current limit (P537) was reached three times within 50 ms. Only possible when P112 and P536 are switched off.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Overcurrent measurement'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Inverter overloaded
  • Drive sluggish or undersized
  • Ramps (P102/P103) too steep
  • Motor data or motor sizing wrong

First checks, in this order

  1. Reduce the motor load and check for blockage or overload.
  2. Check motor data P201 to P209 and the motor sizing.
  3. Increase the ramp times P102/P103.

E005.0: Overvoltage Ud

Hits OEE: Availability

What it means: The DC link voltage is too high.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Link circuit voltage too high' and also name a braking resistor resistance that is too high. SK 200E LED: 5 red flashes.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Drive overloaded while braking (energy fed back from the load)
  • Braking resistor, or its connections and cables, defective
  • Earth fault when running on an IT network
  • Speed fluctuation from high flywheel masses

First checks, in this order

  1. Check the dimensioning of the braking resistor and its wiring.
  2. Extend the deceleration time (P103) and the quick stop time (P426).
  3. On an IT network, check for earth faults, but never at the same time as parameterising.
  4. If needed set the V/f characteristic (P211, P212), or set disconnection mode P108 with delay (not permitted for lifting gear).

E005.1: Mains overvoltage

Hits OEE: Availability

What it means: The mains voltage is too high.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Mains high voltage'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Supply voltage above the range the device is rated for

First checks, in this order

  1. Measure the mains voltage.
  2. Check that the device suits the supply network (Technical data chapter).

E006.0: Charging error

Hits OEE: Availability

What it means: The DC link voltage is too low.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P. SK 500E prints 'Charging fault'. On SK 180E the code E006 is reserved. SK 200E LED: 6 red flashes.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Mains voltage too low

First checks, in this order

  1. Measure the mains voltage.
  2. Check that the device suits the supply network (Technical data chapter).

E006.1: Mains low voltage

Hits OEE: Availability

What it means: The mains voltage is too low.[1][2][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Supply voltage below the range the device is rated for

First checks, in this order

  1. Measure the mains voltage.
  2. Check that the device suits the supply network (Technical data chapter).

E007.0: Mains Phase Failure

Hits OEE: Availability

What it means: Error on the mains side: a mains phase is missing or the mains is asymmetrical.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 200E LED: 7 red flashes.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • A mains phase not connected or missing
  • Asymmetrical mains

First checks, in this order

  1. Check that all mains phases are present.
  2. Check switches and fuses in the supply.

E007.1: Phasefailure dc-link

Hits OEE: Availability

What it means: Mains phase error detected from the DC link voltage.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E: on devices with an external 24 V DC supply for the control unit, this message also appears when the mains is switched off; after the mains returns it must be acknowledged before the inverter can be enabled.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • A mains phase not connected
  • Load temporarily too high (SK 500E and SK 180E text)

First checks, in this order

  1. Check that all mains phases are present.
  2. Check switches and fuses in the supply.

E008.0: Parameter loss (maximum EEPROM value exceeded)

Hits OEE: Availability

What it means: Error in the EEPROM data. Faulty parameters are reloaded automatically with the factory setting.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 200E LED: 8 red flashes.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Stored data set has a software version that is not compatible with the inverter software
  • EMC interference (see also E020)

First checks, in this order

  1. Check the parameters, since faulty ones were reset to factory settings.
  2. Reduce EMC interference: wiring, earthing and shielding.

E008.1: Inverter ID error

Hits OEE: Availability

What it means: Initialisation error of the inverter.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print it as 'Inverter type incorrect' (EEPROM faulty).

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EEPROM defective

First checks, in this order

  1. Switch the mains voltage off and on again.
  2. If it comes back, NORD names a defective EEPROM as the cause.

E008.2: Extern. EEPROM error

Hits OEE: Availability

What it means: Error with the plug-in EEPROM (the -EEP option).[1][2][3][5]

Also on: Series: SK 200E, SK 300P. SK 300P: same name, refers to the ControlBox EEPROM. SK 500E prints 8.2 as 'External copy error (ControlBox)': check the ControlBox position, ControlBox EEPROM defective (P550 = 1). On SK 180E 8.2 is reserved.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Plug-in EEPROM not seated correctly
  • Plug-in EEPROM defective (P550 = 1)

First checks, in this order

  1. Check that the plug-in EEPROM is fitted correctly.
  2. Replace the plug-in EEPROM if it is defective.

E008.3: EEPROM KSE error

Hits OEE: Availability

What it means: The configuration of the frequency inverter (customer unit configuration) was not identified correctly.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E. SK 500E prints 'KSE EEPROM error'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Customer unit configuration not recognised at start up

First checks, in this order

  1. Switch the mains voltage off and on again.

E008.4: EEPROM intern. error (Database version incorrect)

Hits OEE: Availability

What it means: The database version in the EEPROM does not match the database version of the firmware. Parameters are reloaded automatically with the factory setting.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Internal EEPROM error (Database version incorrect)'. SK 500P and SK 300P use the same name with the cause 'configuration not correctly identified' and the remedy: switch the mains voltage off and on again.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EEPROM database version and firmware version do not match

First checks, in this order

  1. Check the parameters after the automatic reload to factory settings.

E008.7: EEPROM copy differs

Hits OEE: Availability

What it means: The parameters saved twice (redundantly) in the EEPROM differ from each other.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'EEPR copy not the same' without further text.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • The two stored parameter copies do not match

First checks, in this order

  1. The SK 200E table gives no remedy; the SK 500P and SK 300P manuals say to switch the mains voltage off and on again.

E008.9: EEP. Ctrlbox too small

Hits OEE: Availability

What it means: The EEPROM of the ControlBox is too small to save the full frequency inverter data set.[2]

Also on: Series: SK 500E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • ControlBox memory smaller than the inverter data set

First checks, in this order

  1. Check which ControlBox is fitted: NORD states its EEPROM cannot hold the full data set.

E009: ControlBox error/ SimpleBox error

Hits OEE: Availability

What it means: SPI bus faulty: no communication with the ControlBox or SimpleBox. The ParameterBox shows no text for this code.[2][3][4]

Also on: Series: SK 500E. SK 500P uses E009.0 to E009.9 'Communication error' for the SK TU5-CTR ControlBox (details in NORD manual BU 0040). On SK 180E E009 is reserved.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • ControlBox not seated correctly
  • SimpleBox cabling wrong or faulty

First checks, in this order

  1. Check that the ControlBox is in the correct position.
  2. Check the SimpleBox cabling.
  3. Switch the mains voltage off and on again.

E010.0: Bus time-out

Hits OEE: Availability

What it means: Telegram time-out on the bus system (CAN, CANopen, USS), or the voltage supply for the bus system is missing.[1][2][3][4]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P. SK 500E and SK 180E print 'Bus Timeout'. SK 200E: red BUS-E LED flashes at 4 Hz.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Data cable connections faulty
  • Bus master or bus protocol program sequence problem
  • 24 V supply of the internal CAN/CANopen bus missing
  • Node guarding error (internal CANopen) or Bus-Off error (internal CANbus)

First checks, in this order

  1. Check the data cable connections.
  2. Check P513 (telegram time-out).
  3. Check the bus master and the program sequence of the bus protocol.
  4. Check the 24 V supply of the internal CAN/CANopen bus.

E010.1: System-error option

Hits OEE: Availability

What it means: System error in the bus interface (option module). With an I/O extension: wrong measurement of input voltages or undefined output voltages because of a reference voltage error, or a short circuit at the analogue output.[1][2][3][4]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P. SK 500E and SK 180E print 'System error option'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Bus interface module system error
  • I/O extension: reference voltage error
  • I/O extension: short circuit at the analogue output

First checks, in this order

  1. See the supplementary manual of the bus module for details.
  2. With an I/O extension, check the analogue output for a short circuit.

E010.2: Bus time-out option

Hits OEE: Availability

What it means: Telegram time-out of the bus interface, from the PLC side.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Bus Timeout Option'. SK 200E: red BUS-E LED flashes at 1 Hz for a time-out on the external bus.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Telegram transmission faulty
  • Physical bus connection problem
  • Bus protocol program sequence or bus master problem
  • PLC in STOP or ERROR state

First checks, in this order

  1. Check the physical bus connections.
  2. Check the program sequence of the bus protocol and the bus master.
  3. Check that the PLC is not in STOP or ERROR.

E010.3: System-error option

Hits OEE: Availability

What it means: System error in the bus interface (option module). With an I/O extension: wrong measurement of input voltages or undefined output voltages because of a reference voltage error, or a short circuit at the analogue output.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 200E: red BUS-E LED flashes at 1 Hz when the system bus module has a module error.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Bus interface module system error
  • I/O extension: reference voltage error
  • I/O extension: short circuit at the analogue output

First checks, in this order

  1. See the supplementary manual of the bus module for details.
  2. With an I/O extension, check the analogue output for a short circuit.

E010.4: Init-error option

Hits OEE: Availability

What it means: Initialisation error of the bus module.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Init error Option'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Bus module power supply problem
  • Bus module not plugged in correctly (SK 500E text)
  • Wrong DIP switch position on a connected I/O extension module

First checks, in this order

  1. Restart the inverter: switch the power supply off and on again.
  2. Check the bus module power supply.
  3. Check the DIP switch position of a connected I/O extension module.
  4. On SK 500E, SK 500P and SK 300P also check P746.

E010.5 / E010.6 / E010.7: System-error option

Hits OEE: Availability

What it means: System error in the bus interface (option module). With an I/O extension: wrong measurement of input voltages or undefined output voltages because of a reference voltage error, or a short circuit at the analogue output.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Bus interface module system error
  • I/O extension: reference voltage error
  • I/O extension: short circuit at the analogue output

First checks, in this order

  1. See the supplementary manual of the bus module for details.
  2. With an I/O extension, check the analogue output for a short circuit.

E010.8: Error option

Hits OEE: Availability

What it means: Communication error with the external bus interface.[1][2][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P. SK 500E prints 'Option error'. SK 500P and SK 300P: communication error between the frequency inverter and the bus interface.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Connection error or fault of the external bus interface
  • Short interruption (under 1 s) of the 24 V supply of the internal CAN/CANopen bus

First checks, in this order

  1. Check the connection to the external bus interface.
  2. Check that the 24 V supply of the internal CAN/CANopen bus is stable.

E010.9: Missing Option /P120

Hits OEE: Availability

What it means: The module entered in parameter P120 is not present.[1][3][4]

Also on: Series: SK 200E, SK 180E, SK 500P. SK 180E prints 'Module missing / P120'. SK 200E: red BUS-E LED flashes at 4 Hz.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Module listed in P120 not connected or not detected

First checks, in this order

  1. Check connections and cables on both sides.
  2. Check that P120 matches the modules actually fitted.

E011.0: Control terminals

Hits OEE: Availability

What it means: A/D converter error: the internal control terminal (internal data bus) is defective, or disturbed by radio interference (EMC).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Customer terminal'. SK 500P and SK 300P describe it as 'Communication error to CU module' and note the stored position (P619) may no longer be correct.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Internal control terminal (internal data bus) defective
  • EMC interference
  • Short circuit on the control connections

First checks, in this order

  1. Check the control connections for a short circuit.
  2. Route control cables and power cables separately to reduce EMC interference.
  3. Earth the device and the screens well.

E011.1: CU version

Hits OEE: Availability

What it means: The firmware of the customer unit (SK CU5 on SK 500P, SK CU6 on SK 300P) is not compatible.[4][5]

Also on: Series: SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Customer unit firmware and inverter firmware do not match

First checks, in this order

  1. Update the firmware of the customer unit or of the frequency inverter.

E012.0: External Watchdog

Hits OEE: Availability

What it means: A digital input is set to the Watchdog function and the expected pulse did not arrive within the watchdog time (P460).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Watchdog pulse from the controller missing
  • Digital input wiring problem

First checks, in this order

  1. Check the digital inputs and their wiring.
  2. Check P420 and P460.

E012.1: Limit moto./Customer

Hits OEE: Availability

What it means: The drive (motor) switch-off limit set in P534 [-01] has triggered.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E prints 'Motor limit'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor load too high
  • Blockage or overload in the machine

First checks, in this order

  1. Reduce the motor load.
  2. Check the machine for blockage or overload.
  3. Check P534 [-01]; SK 500E and SK 180E suggest a higher value there.

E012.2: Limit gen.

Hits OEE: Availability

What it means: The load drives the motor into generator operation and the generator switch-off limit set in P534 [-02] has triggered.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E prints 'Generator limit'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Machine driving the motor (generator load) too hard
  • Overload in the system

First checks, in this order

  1. Reduce the generator load on the motor.
  2. Check the system for overload.
  3. Check P534 [-02].

E012.3: Torque limit

Hits OEE: Availability

What it means: A parameterised torque limit has been reached: the limit given by the potentiometer or setpoint source (P400 = 12) has switched the drive off.[1][3][4][5]

Also on: Series: SK 200E, SK 180E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Torque limit from the potentiometer or setpoint source reached

First checks, in this order

  1. Check the setpoint source used as torque limit (P400 = 12) and its value.

E012.4: Current limit

Hits OEE: Availability

What it means: The current limit given by the potentiometer or setpoint source (P400 = 14) has switched the drive off.[1][3][4][5]

Also on: Series: SK 200E, SK 180E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Current limit from the potentiometer or setpoint source reached

First checks, in this order

  1. Check the setpoint source used as current limit (P400 = 14) and its value.

E012.5: Load monitor

Hits OEE: Availability

What it means: The load torque went above or below the permitted limits (P525 to P529) for longer than the time set in P528.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E prints 'Load limit'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Load outside the permitted torque window

First checks, in this order

  1. Adjust the load.
  2. Change the limit values P525 to P527.
  3. Increase the delay time P528.
  4. Change the monitoring mode P529.

E012.8: Analog in. minimum

Hits OEE: Availability

What it means: Switch-off because the analogue input fell below its 0 % adjustment value (P402) while P401 is set to a mode 'with error switch-off 1' or '2'.[1][2][3][4]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P. SK 500E prints 'Analog In minimum', SK 180E 'AI minimum'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Analogue signal below the 0 % adjustment value

First checks, in this order

  1. Check the analogue signal and its wiring at the input.
  2. Check P401 and P402.

E012.9: Analog in. maximum

Hits OEE: Availability

What it means: Switch-off because the analogue input passed its 100 % adjustment value (P403) while P401 is set to a mode 'with error switch-off 1' or '2'.[1][2][3][4]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P. SK 500E prints 'Analog In maximum', SK 180E 'AI maximum'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Analogue signal beyond the 100 % adjustment value

First checks, in this order

  1. Check the analogue signal and its wiring at the input.
  2. Check P401 and P403.

E013.0: Encoder error

Hits OEE: Availability

What it means: Signals from the (TTL) encoder are missing, or a slip error occurred.[1][2][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Encoder connection or cable fault
  • Encoder mechanically installed wrongly (encoder shaft stands still while slip error monitoring is active)
  • Wrong encoder type or parameter settings
  • Encoder supply voltage missing
  • Cable routing (EMC)

First checks, in this order

  1. Check connections and cables on both sides.
  2. Check the mechanical installation of the encoder.
  3. Check encoder type and parameter settings.
  4. Check the encoder supply voltage.
  5. Check the cable routing for EMC.

E013.1: Speed slip error

Hits OEE: Availability

What it means: The difference between measured and calculated speed has exceeded a limit value (P327, P328).[1][2][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Encoder mechanically installed wrongly
  • Blockage or overload
  • Inverter in derating, so the current needed for acceleration is not available

First checks, in this order

  1. Check the mechanical installation of the encoder.
  2. Check the system for blockage or overload.
  3. Check the limit values in P327 and P328.
  4. Increase the acceleration times.

E013.2: Disconnect. control

Hits OEE: Availability

What it means: The slip error switch-off monitoring has triggered: the motor could not follow the setpoint.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 180E prints 'Shut-down monitoring'. SK 500E: active when the required deceleration time is more than 1.5 x P103 + 2 s.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Blockage or overload
  • Motor data wrong
  • Star / delta connection wrong
  • Torque current limit (P112) or current limit (P536) set too low
  • Deceleration time (P103) too short

First checks, in this order

  1. Check the system for blockage or overload.
  2. Check motor data P201 to P209.
  3. Check the star / delta connection.
  4. In servo mode check the encoder settings from P300 on.
  5. Increase P112 and P536.
  6. Check the deceleration time P103 and extend it if needed.

E013.3: Slipfault encoder

Hits OEE: Availability

What it means: The encoder reports the wrong direction of rotation.[1][4][5]

Also on: Series: SK 200E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Encoder connected with the wrong direction

First checks, in this order

  1. Check the encoder connections.

E013.4: HTL slip error

Hits OEE: Availability

What it means: With the inverter not enabled (Ready for switch-on), it detected encoder speed that is not zero.[1][4][5]

Also on: Series: SK 200E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Encoder mechanically installed wrongly
  • Overload turning the motor
  • Holding brake not holding

First checks, in this order

  1. Check the mechanical installation of the encoder.
  2. Check the system for overload.
  3. Check the holding brake, if present.

E016.0: Motor phase failure

Hits OEE: Availability

What it means: A motor phase is not connected.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 180E prints 'Motor phase error'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Open motor phase in the cable, terminals or motor

First checks, in this order

  1. Check connections and cables on both sides.
  2. Check the motor.
  3. Check P539.

E016.1: Magn. current watch

Hits OEE: Availability

What it means: The required magnetising (exciting) current was not reached at the moment of switch-on.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 180E prints 'Magnetisation current monitoring'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor connection problem
  • Motor fault
  • Wrong motor data

First checks, in this order

  1. Check connections and cables on both sides.
  2. Check the motor.
  3. Check P539.
  4. Check motor data P201 to P209.

E016.2: Change phase direct.

Hits OEE: Availability

What it means: The motor phase sequence (U, V, W) was changed during operation while the drive was enabled.[1][2][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Phase sequence parameter or parameter set switched while enabled

First checks, in this order

  1. Check P583 (motor phase sequence).
  2. Check whether the parameter set (P100) was switched over.

E017.0: Faulty customer unit

Hits OEE: Availability

What it means: The frequency inverter does not recognise the customer unit (SK CU5-...).[2]

Also on: Series: SK 500E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Customer unit loose or poor contact
  • EMC interference

First checks, in this order

  1. Check the fastening and the contacts of the customer unit.
  2. Check cable shielding and the earth connections of the electrical components.

E019.0: Error parameter identification

Hits OEE: Availability

What it means: Automatic identification of the connected motor has failed.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E, SK 500P and SK 300P print 'Parameter ident.'; SK 180E prints 'Parameter identification'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor connection problem
  • Motor fault
  • Wrong motor data

First checks, in this order

  1. Check connections and cables on both sides.
  2. Check the motor.
  3. Check motor data P201 to P209.

E019.1: Rotorposition

Hits OEE: Availability

What it means: Incorrect rotor position data, from a wrong result of rotor position identification by the test signal method (P330), or from switching the control method (P300) while the drive is enabled.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P. SK 180E uses E019.1 for 'Star / Delta circuit incorrect' (motor star / delta connection incorrect).

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Wrong result of rotor position identification (P330)
  • Control method P300 switched with the drive enabled

First checks, in this order

  1. Check P330.
  2. Do not switch the control method P300 while the drive is enabled.
  3. Increase the static boost (P210).

E019.2: Rotorpos.North/South

Hits OEE: Availability

What it means: Rotor position identification by the test signal method gave a wrong result. With control method 'CFC open-loop-inje' (P300), a flying start attempt (P520) below 10 Hz causes this error.[1][2][4][5]

Also on: Series: SK 200E, SK 500E, SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Wrong result of rotor position identification
  • Flying start (P520) below 10 Hz in CFC open-loop-inje mode

First checks, in this order

  1. Check P300 and P520.
  2. SK 500E (PMSM in CFC closed loop): run rotor position determination (P330); the first enable after mains on only with the motor at standstill.

E019.3: Rotor position adjustment

Hits OEE: Availability

What it means: The rotor position taken from the encoder zero pulse deviates a lot from the rotor position found by the test signal method (P330).[4][5]

Also on: Series: SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Motor phases not connected correctly

First checks, in this order

  1. Connect motor phase U to motor terminal U of the inverter.
  2. Adjust the PMSM encoder offset (P334).

E020.1: Watchdog

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.2: Stack overflow

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.3: Stack underflow

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.4: Undefined opcode

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.5: Protected instruction

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E. SK 500E and SK 180E print 'Protected Instruct.'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.6: Illegal word access

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.7: Illegal instruction access

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E. SK 500E and SK 180E print 'Illegal Inst. Access'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.8: EEPROM error (Wrong flash checksum)

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E. SK 500E and SK 180E print 'Program memory error (EEPROM error)'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E020.9: Memory Protection Error

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E. SK 500E and SK 180E list 20.9 as 'Dual-ported RAM' in the same EMC system error group.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E021.0: NMI error

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E. SK 500E and SK 180E add '(Not used by hardware)'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E021.1: PLL error

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E021.2: ADU error

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E. SK 500E and SK 180E print 'ADU error "Overrun"'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E021.3: PMI error

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E. SK 500E and SK 180E print 'PMI error "Access Error"'.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E021.4: Userstack Overflow

Hits OEE: Availability

What it means: System error in program execution, triggered by EMC interference.[1][2][3]

Also on: Series: SK 200E, SK 500E, SK 180E.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • EMC interference

First checks, in this order

  1. Follow the wiring guidelines (separate routing, screening).
  2. Use an additional external line filter.
  3. Earth the device well.

E090.0: Extended error

Hits OEE: Availability

What it means: The inverter received an error code from an external module that it does not know.[4][5]

Also on: Series: SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Error code from an external module that the inverter firmware does not know

First checks, in this order

  1. Update the inverter firmware.
  2. Read the new, extended error code in P700 [-04].

E099.0: System error

Hits OEE: Availability

What it means: Internal error of the inverter.[4][5]

Also on: Series: SK 500P, SK 300P.

Inverter response: Inverter switches off; fix the cause, then acknowledge

Likely causes

  • Internal inverter error

First checks, in this order

  1. Restart the device.
  2. With a PMSM, check the stored position (P619) and the rotor position, which may be lost.

C001.0: Inverter overtemp.

Warning: act before it becomes a stop

What it means: Warning from the inverter temperature monitoring: the temperature range has been exceeded or undershot (SK 500E and SK 180E: permissible temperature limit reached).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Overtemp. Inverter'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Ambient temperature too high or too low
  • Fan or control cabinet ventilation not working
  • Dirt on the device reducing cooling

First checks, in this order

  1. Bring the ambient temperature back into range (reduce it, or increase it if too cold).
  2. Check the fan or the control cabinet ventilation.
  3. Check the device for dirt and clean it.
  4. Read the current temperatures in P739.

C002.0: Motor overtemp. PTC

Warning: act before it becomes a stop

What it means: Warning from the motor temperature sensor: the trigger limit has been reached.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Motor overtemp.PTC'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Motor load too high
  • Motor running too slowly to cool itself
  • External motor fan missing or not working

First checks, in this order

  1. Reduce the motor load.
  2. Increase the motor speed.
  3. Fit an external motor fan, or check that the existing one works.
  4. Check the setting of P425.

C002.1: Motor overtemp. I2t

Warning: act before it becomes a stop

What it means: The inverter has calculated an impermissible motor temperature (motor I2t).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E: only if motor I²t (P535) is programmed; warns when 1.3 times rated current is reached for the time set in P535.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Motor load too high
  • Motor speed too low for the load

First checks, in this order

  1. Reduce the motor load.
  2. Increase the motor speed.
  3. Repeat the stator resistance measurement (motor data section of the manual).

C002.2: Ext resistor temp.

Warning: act before it becomes a stop

What it means: A temperature sensor on a digital input (for example on the braking resistor) has triggered; the digital input is low.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Ext Resistor Temp' (digital input function P420 = 13).

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Braking resistor (or other monitored part) getting too hot
  • Connection or sensor problem on the digital input

First checks, in this order

  1. Check the connection and the temperature sensor.

C003.0: Overcurrent I2t lim.

Warning: act before it becomes a stop

What it means: The inverter current limit (I2t) has been exceeded, for example more than 1.3 times rated current for 60 s.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Overcurrent, I2t limit'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Motor load too high
  • Blockage or overload in the machine
  • Rotary encoder problem: wrong resolution, defect or bad connection

First checks, in this order

  1. Reduce the motor load.
  2. Check the machine for blockage or overload.
  3. Check the encoder settings, the encoder and its connection.
  4. The current limit can be adjusted by changing the pulse frequency (P504).

C003.1: Overcurrent chopper I2t

Warning: act before it becomes a stop

What it means: The brake chopper current limit (I2t) has been exceeded, for example more than 1.3 times rated current for 60 s.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Overcurrent, chopper I2t'; SK 500P and SK 300P print 'Overcurrent chopper'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Too much current through the braking resistor
  • Braking resistor values set wrongly

First checks, in this order

  1. Avoid overcurrent in the braking resistor.
  2. Check the braking resistor values in P555, P556, P557, and P554 if available.

C003.5: Torque limit

Warning: act before it becomes a stop

What it means: The limit value of the torque generating current (parameterised mechanical load limit) has been reached.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Torque current limit'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Blockage or overload in the machine
  • Torque current limit P112 reached

First checks, in this order

  1. Check the system for blockage or overload.
  2. Check the value in P112.

C003.6: Current limit

Warning: act before it becomes a stop

What it means: The limit value of the inverter output current (parameterised inverter load limit) has been reached.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Blockage or overload in the machine
  • Current limit P536 reached

First checks, in this order

  1. Check the system for blockage or overload.
  2. Check P536.

C003.7: Real power

Warning: act before it becomes a stop

What it means: Input current too high: the drive is running at the load limit.[4][5]

Also on: Series: SK 500P, SK 300P.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Motor load too high
  • Blockage or overload in the machine
  • Mains voltage in the lower tolerance range, which raises the input current

First checks, in this order

  1. Reduce the motor load.
  2. Check the system for blockage or overload.
  3. Check the mains voltage.

C003.8: Total current < > 0

Warning: act before it becomes a stop

What it means: The inverter monitors the sum of the three phase currents (L1, L2, L3). This warning appears when that sum passes a threshold, and NORD says it indicates a defect in the current measurement hardware.[4]

Also on: Series: SK 500P.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Defect in the inverter current measurement hardware

First checks, in this order

  1. Treat it as a hardware fault of the inverter current measurement, as NORD states.

C004.1: Overcurrent measurem.

Warning: act before it becomes a stop

What it means: The pulse switch-off limit (P537) has been reached. Only possible when P112 and P536 are switched off.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Overcurrent measurement'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Inverter overloaded
  • Drive sluggish or undersized
  • Ramps (P102/P103) too steep
  • Motor data or motor sizing wrong

First checks, in this order

  1. Reduce the motor load and check for blockage or overload.
  2. Check motor data P201 to P209 and the motor sizing.
  3. Increase the ramp times P102/P103.
  4. SK 500E and SK 180E: switch off slip compensation (P212).

C008.0: Parameter loss

Warning: act before it becomes a stop

What it means: One of the cyclically saved values, such as operating hours or enable time, could not be saved. The warning disappears as soon as saving succeeds again.[2][3][4][5]

Also on: Series: SK 500E, SK 180E, SK 500P, SK 300P.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Cyclic save of operating data did not succeed

First checks, in this order

  1. NORD lists no remedy: the warning clears once saving works again.

C012.1: Limit moto./Customer

Warning: act before it becomes a stop

What it means: The motor switch-off limit is being reached (SK 500E and SK 180E: 80 % of the drive switch-off limit P534 [-01] exceeded).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E prints 'Motor Limit / Customer'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Motor load too high
  • Blockage or overload in the machine

First checks, in this order

  1. Reduce the motor load.
  2. Check the system for blockage or overload.
  3. Check P534 [-01].

C012.2: Limit gen.

Warning: act before it becomes a stop

What it means: The machine drives the motor into generator operation and 80 % of the generator switch-off limit (P534 [-02]) has been reached.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E prints 'Generator limit'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Machine driving the motor (generator load) too hard
  • Overload in the system

First checks, in this order

  1. Reduce the generator load on the motor.
  2. Check the system for overload.
  3. Check P534 [-02].

C012.3: Torque limit

Warning: act before it becomes a stop

What it means: 80 % of the torque limit given by the potentiometer or setpoint source (P400 = 12) has been reached.[1][3][5]

Also on: Series: SK 200E, SK 180E. SK 300P lists C012.3 'Torque limit' without further text. SK 180E also has C012.4 'Current limit' (80 % of the limit with P400 = 14).

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Torque limit from the potentiometer or setpoint source nearly reached

First checks, in this order

  1. Check the setpoint source used as torque limit (P400 = 12) and the load.

C012.5: Load monitor

Warning: act before it becomes a stop

What it means: The load torque went above or below the permitted limits (P525 to P529) for half of the time set in P528.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E word it as 'for the time set in P528'.

Inverter response: Warning only, inverter keeps running; clears by itself when the cause is gone

Likely causes

  • Load outside the permitted torque window

First checks, in this order

  1. Adjust the load.
  2. Change the limit values P525 to P527.
  3. Increase the delay time P528.
  4. Change the monitoring mode P529.

I000.1: Volt. blocked by IO

Warning: act before it becomes a stop

What it means: Switch-on inhibit: the digital input set to the 'Voltage disable' function (P420/P480) is not set (low), so the drive will not start.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Disable voltage from IO'.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Voltage disable input low
  • Broken signal cable

First checks, in this order

  1. Set the input high.
  2. Check connections and cables on both sides.
  3. Check the digital input functions P420/P480.

I000.2: Quick stop by IO

Warning: act before it becomes a stop

What it means: Switch-on inhibit: the digital input set to the 'Quick stop' function (P420/P480) is not set (low).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'IO fast stop'.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Quick stop input low
  • Broken signal cable

First checks, in this order

  1. Set the input high.
  2. Check connections and cables on both sides.
  3. Check the digital input functions P420/P480.

I000.3: Volt. blocked by Bus

Warning: act before it becomes a stop

What it means: Switch-on inhibit under bus control: with 'Source control word' (P509) not 0 or 1, bit 1 of the control word is low.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Block voltage from bus'.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Control word bit 1 low

First checks, in this order

  1. Set bit 1 of the control word high.
  2. Check P509.

I000.4: Quick stop by Bus

Warning: act before it becomes a stop

What it means: Switch-on inhibit under bus control: with 'Source control word' (P509) not 0 or 1, bit 2 of the control word is low.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Bus fast stop'.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Control word bit 2 low

First checks, in this order

  1. Set bit 2 of the control word high.
  2. Check P509.

I000.5: Enable at start

Warning: act before it becomes a stop

What it means: An enable signal was already present while the inverter was switching on (mains or control voltage on), or when it went from Fault or Switch-on inhibit back to Ready with the enable still active. The inverter waits for a fresh enable (0 to 1 edge).[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Enable on start' and add 'or electrical phase is missing'.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Enable applied before the inverter was ready
  • Enable still active when a fault was acknowledged

First checks, in this order

  1. Remove the enable signal and apply it again once the inverter is ready.
  2. Check the enable sources: digital inputs (P420), BusIO In (P480), control word (P740).
  3. Automatic starting (P428) makes the inverter react to the level, but NORD warns the drive then starts up immediately: risk of injury.

I000.8: Right dir. locked

Warning: act before it becomes a stop

What it means: Switch-on inhibit: the right (clockwise) direction is blocked by P540 or by a digital input set to 'Block enable right' (P420 = 31 or 73). The inverter goes to 'Ready to switch-on'.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Right direction blocked'.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Direction blocked by P540
  • Digital input 'Block enable right' active

First checks, in this order

  1. Check P540.
  2. Check the digital input functions (P420 = 31 or 73) and their signals.

I000.9: Left dir. locked

Warning: act before it becomes a stop

What it means: Switch-on inhibit: the left direction is blocked by P540 or by a digital input set to 'Block enable left' (P420 = 32 or 74). The inverter goes to 'Ready to switch-on'.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 500E and SK 180E print 'Left direction blocked'.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Direction blocked by P540
  • Digital input 'Block enable left' active

First checks, in this order

  1. Check P540.
  2. Check the digital input functions (P420 = 32 or 74) and their signals.

I006.0: Charging error

Warning: act before it becomes a stop

What it means: Not ready: the charging relay is not energised because the mains or DC link voltage is too low, the mains voltage has failed, or evacuation mode is active (P420/P480). The ParameterBox shows 'Not ready'.[1][2][3][4][5]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P, SK 300P. SK 180E lists activating evacuation mode as the remedy. SK 200E sizes 1 to 3: DS LED alternates red and green at 1 Hz for a charging error.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Mains or DC link voltage too low
  • Mains voltage failure
  • Evacuation mode active via P420/P480

First checks, in this order

  1. Measure the mains voltage on all phases.
  2. Check whether evacuation mode is active through a digital input (P420/P480).

I011.0: Analog Stop

Warning: act before it becomes a stop

What it means: An analogue input set for wire break detection (2 to 10 V or 4 to 20 mA) has dropped below 1 V or 2 mA, so the inverter goes to 'ready for switch-on'. This also happens when the analogue input is set to function 0 (no function).[1][2][3][4]

Also on: Series: SK 200E, SK 500E, SK 180E, SK 500P.

Inverter response: Drive will not start (switch-on inhibit, not ready) while the condition is present

Likely causes

  • Analogue signal below 1 V or 2 mA, for example a broken signal wire
  • Analogue input set to function 0

First checks, in this order

  1. Check the connection of the analogue signal.
  2. Check the analogue input function setting.

Log it, or the same alarm comes back

An E error switches the inverter off and stops the motor, so in OEE terms it is a breakdown. Log the code, the machine and the minutes lost; C warnings and I switch-on inhibits that keep a line from starting count as lost time too.

  • Reason code: the code plus the drive, for example NORD SK 200E E003.0 overcurrent, infeed conveyor, so an overcurrent that comes back after every product change shows up as a pattern.
  • Loss bucket: a stop that needs a reset, a part or a technician is an availability loss (breakdown). Stops shorter than your micro-stop threshold go to performance (minor stops). The six big losses page shows where each one belongs.
  • What to count: how often each code fires per week and the minutes it costs. Two numbers a week turn "that alarm comes up sometimes" into a ranked list. The MTBF and MTTR calculator and the downtime cost calculator do the math.

The free OEE tracker logs each stop with its reason and turns the week into a downtime Pareto, so the code that costs the most rises to the top.

fabrico.io has a guide to VFD fault codes. A code tells you what the inverter measured, not what happened at the machine in the seconds before. Fabrico's camera-based OEE software syncs line camera video with machine data, so you can replay the moment the line stopped next to the trip.

Frequently asked questions

What does error E003 mean on a NORD SK 200E inverter?

E003 is the overcurrent group, and the status LED flashes red 3 times for it. P700 [-01] shows which one: 3.0 Overcurrent I²t lim. (inverter current limit exceeded, for example more than 1.5 times rated current for 60 s), 3.1 brake chopper I²t limit, 3.2 Overcurrent IGBT (220 %), 3.3 Overcurrent IGBTfast (230 %), 3.4 brake chopper current too high, or 3.7 Power limit input (150 % input overload within 60 s). NORD's first steps: reduce the motor load, check the machine for blockage or overload, check the encoder settings and the braking resistor values (P554 to P557), and on fan drives enable flying start (P520).

How do I reset a fault on a NORD SK 200E or SK 500E?

Fix the cause first. When the cause is gone the SimpleBox or ControlBox error display flashes, and the Enter key acknowledges it. NORD also allows switching the mains off and on, a digital input programmed for acknowledgement (P420), removing the enable signal if no input is programmed for acknowledgement, a bus acknowledgement, or automatic acknowledgement with P506. Warnings (C codes) cannot be acknowledged; they clear by themselves. NORD warns that the drive may start when a fault is acknowledged, and that P506 = 6 must never be combined with P428 = 1.

What is the difference between E, C and I codes on a NORD inverter?

E codes are errors: the inverter switches off to protect itself and the error has to be acknowledged. C codes are warnings: a limit has been reached but the inverter keeps running; they cannot be acknowledged and disappear when the cause is gone. I codes give the reason the inverter is in switch-on inhibit or 'Not ready', for example I000.1 when the voltage disable input is low or I000.5 when the enable was already on at power up. Errors are in P700 [-01], warnings in P700 [-02] and inhibit reasons in P700 [-03]. I codes can only be read with a ParameterBox or NORD CON, not with the SimpleBox.

How do I read the fault history on a NORD SK 200E?

Parameter P701 stores the last 5 faults in arrays [-01] to [-05]. For each one, P702 stores the output frequency, P703 the output current, P704 the output voltage, P705 the DC link voltage and P706 the active parameter set at the moment of the fault, and P799 the operating hours. On a SimpleBox or ControlBox select memory slot 1 to 5 and confirm with OK or ENTER to read the saved value. A ParameterBox shows the messages in plain text.

What does the red flashing LED on a NORD SK 200E mean?

Red on the DS (device state) LED means an error is pending, and the number of flashes matches the error group, for example 3 flashes for E003. Red and green alternating at 4 Hz is a warning, and on sizes 1 to 3 alternating at 1 Hz is a charging error. Green on with red flashing means the inverter is not ready because the STO voltage on DIN4 is missing. Green flashing at 0.5 Hz means ready but not enabled, and at 4 Hz switch-on inhibit. A red BUS-E LED points to a system bus problem (E10.x).

Why does my NORD inverter not start even though the enable signal is on?

NORD lists these causes: the enable was already present before the device was ready, so it waits for a new 0 to 1 edge (I000.5 Enable at start; remove and reapply the enable, or set P428 so the device reacts to the level, which NORD warns can start the drive on its own); the voltage disable or quick stop input is low (I000.1, I000.2); control word bit 1 or 2 is low under bus control (I000.3, I000.4); right and left enable are present at the same time; the control word source is wrong (check P509); or a direction is blocked (I000.8, I000.9, P540). If the motor still does not turn with enable present, NORD points to unconnected motor cables, a brake that does not release, a missing setpoint or a wrong setpoint source (P510).

Sources

Codes and meanings follow the manufacturer documentation below. Wording is ours, simplified for the shop floor; the manual for your exact model and software version wins if it differs.

  1. NORDAC FLEX (SK 200E series) Users Manual for Frequency Inverters, BU0200, en-GB, edition December 2025 (order no. 6072002/5125), covers SK 200E, SK 205E, SK 210E, SK 215E, SK 220E, SK 225E, SK 230E, SK 235E, hosted by NORD (media.nord.com)
  2. NORDAC PRO (SK 500E series) Manual with installation instructions, BU 0500, en, edition March 2024 (order no. 6075002/1024), covers SK 500E, SK 505E, SK 510E, SK 511E, SK 515E, SK 520E, SK 530E, SK 535E, hosted by NORD (media.nord.com)
  3. NORDAC BASE (SK 180E series) Users Manual for Frequency Inverters, BU 0180, en, edition September 2024 (order no. 6071802/3824), covers SK 180E and SK 190E, hosted by NORD (media.nord.com)
  4. NORDAC PRO (SK 500P series) Manual with installation instructions, BU 0600, en, edition June 2024 (order no. 6076002/2324), covers SK 500P, SK 510P, SK 530P, SK 540P, SK 550P, hosted by NORD (media.nord.com)
  5. NORDAC ON (SK 300P series) Manual with installation instructions, BU 0800, en-GB, edition June 2025 (order no. 6078002/2625), covers SK 300P, SK 301P, SK 310P, SK 311P, SK 350P, hosted by NORD (media.nord.com)

See the moment the drive tripped

Fabrico, a light MES with computer vision, syncs camera footage with machine and timeline data, so you can replay the exact moment the line stopped and review the cause next to the drive's fault. Cameras also catch short stops and a line that is switched on but not producing, the losses nobody writes down. Machines connect through a PLC, a Fabrico IoT device or an AI camera.

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