Nidec & Control Technique Commander SX Drive

Nidec & Control Technique Commander SX Drive Fault Codes:

Fault Code and MeaningCause and Remedy
cL1
ADI1 loss
Cause: Loss of the current reference on analog input ADI1.



Remedy:

  • Check that current is > 3 mA.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
cL2
ADI2 loss
Cause: Loss of the current reference on analog input ADI2.



Remedy:

  • Check that current is > 3 mA.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
cL3
ADIO3 loss
Cause: Loss of the current reference on analog input ADIO3.



Remedy:

  • Check that current is > 3 mA.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
EEF
EEPROM fail.
Cause: Drive rating does not match with XPressKey.



Remedy:

  • Return to default factory settings (see 65).

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
enC2
Encoder rot
Cause: The measured position does not vary (the encoder is incorrectly connected or not supplied with power or the shaft is not turning).



Remedy:

  • Check encoder connections.

  • Check the motor rotation is normal.
EnC1
U sign. loss
Cause: Loss of channel U.



Remedy:

  • Check the speed feedback.

  • Replace the encoder.
EnC2
V sign. loss
Cause: Loss of channel V.



Remedy:

  • Check the encoder voltage and connections.
EnC3
W sign. loss
Cause: Loss of channel W.



Remedy:

  • Check the encoder voltage and connections.
Fbus
Fieldbus loss
Cause: Disconnection of the fieldbus.



Remedy:

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.

  • Check fieldbus connections and status.
It.AC
Motor I²t
Cause: Motor overload I x t.



Remedy:

  • Read the battery value in 4.19.

  • Check that the motor is not overloaded.

  • Adjust the rated speed.

  • Check that the motor rated current is correctly set (06).

  • Speed feedback: check the coupling, and check that the signal is not disturbed.

  • Check the number of motor poles in 62.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
It.br
Brak. resist.
Cause: Braking resistor overload I x t.



Remedy:

  • Read the battery value in 10.39.

  • Increase the resistor ohmic value.

  • Check that 10.30 and 10.31 are set correctly (braking cycle too long).

  • Check the resistor wiring.

  • Check the integrated transistor.
Oht1
Dv over heat
Cause: IGBT overheating (sensor).



Remedy:

  • Reduce the motor load, the cycle, the switching frequency and the acceleration and deceleration ramps.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
Oht2
BR over heat
Cause: Internal resistor overheating (sensor).



Remedy:

  • Reduce the switching frequency.

  • Reduce the cycle and the motor load.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
OI.AC
Over current
Cause: Overcurrent at drive output.



Remedy:

  • Check motor insulation and connection.

  • Increase acceleration and deceleration rates.

  • Check feedback devices.

  • Check motor cable length.

  • Reduce the speed controller gains 29 (3.10), 30 (3.11) and 3.12.

  • If not already set, perform an autotune 63 = 2.

  • Reduce current controller gains 31 (4.13) and 32 (4.14).
OIbr
Brak.IGBT
Cause: IGBT braking overcurrent.



Remedy:

  • Check the resistor insulation.

  • Correct the short-circuit at the resistor output.

  • Set a higher resistor ohmic value.
Old1
24V over Id
Cause: Overload on +24V source or logic output.



Remedy:

  • Check the total current consumption.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
OSP
Over speed
Cause: Overspeed.



Remedy:

  • The speed is higher than 1.2 times the value of 02.

  • Check that the load is not driving.

  • Check that the overspeed threshold has been set correctly.

  • Adjust the speed loop gains.

  • Set a longer deceleration time.
OU
DC over volt
Cause: DC bus overvoltage.



Remedy:

  • Provide a braking resistor (optional). If a resistor is already connected, reduce its value (within permitted limits).

  • Check that the mains supply is not disturbed.

  • Check the motor insulation.

  • Set a longer deceleration time in 04.

  • Check the deceleration mode.
ph
In Ph. loss
Cause: Phase loss. Note: The loss of one phase can only be detected if the active current is between 50% and 100% of the rated value.



Remedy:

  • Check the mains supply (3 phases present and balanced).

  • Check the level of supply voltage (at full load).
Ph.AC
Out Ph. loss
Cause: Motor phase loss.



Remedy:

  • Check the connection of phases U, V and W in both the motor and the drive.
rot
A/B reversed
Cause: The a, b, a\, b\ signals are the wrong way round.



Remedy:

  • Reverse 2 motor phases or 2 encoder channels.
rS
Stator res.
Cause: Stator resistance measurement fault.



Remedy:

  • Adapt the drive power to that of the motor.

  • Check the connection of the motor cables.
SCL
COM loss
Cause: Serial link fault.



Remedy:

  • Replace the keypad or the cable.

  • Check the connectors between the keypad and the drive.

  • Check that the cable is not damaged.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
Secd
Sec.disable
Cause: Secure input fault.



Remedy:

  • Give a stop command before enabling the drive.
Th
Motor PTC
Cause: Motor sensor trip.



Remedy:

  • Check the motor load.

  • Reduce the level of overload.

  • Check the motor cooling and the ambient temperature.

  • Check the wiring of the ADI2 terminal on the control terminal block.

  • If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
tr01 – tr10
User 1 – 10
Cause: User fault 1 through 10 via logic input or serial link.



Remedy:

  • Check logic inputs or serial communications.

  • For tr05, tr10: If 10.37 = 1 (Ctld), the drive decelerates the motor without tripping.
tun3
UVW revers.
Cause: The u, v, w switching signals are the wrong way round.



Remedy:

  • Check encoder and motor connections.
tun4
U sign.miss.
Cause: Some signals are present, but U is missing.



Remedy:

  • Check encoder connections.
tun5
V sign.miss.
Cause: Some signals are present, but V is missing.



Remedy:

  • Check encoder connections.
tun6
W sign.miss.
Cause: Some signals are present, but W is missing.



Remedy:

  • Check encoder connections.
tun7
Pole count
Cause: The number of pairs of poles set is incorrect (the revolutions measured mechanically and electrically are inconsistent).



Remedy:

  • Check encoder lines per revolution.

  • Verify 5.11 (62) “number of motor poles” setting.
tunE
Autotun. fail
Cause: Autocalibration error.



Remedy:

  • Drive set to fault mode during the autocalibration phase.

  • The Stop key has been pressed.

  • The SDI2 contact has been opened during the autocalibration phase.
UU
Under volt.
Cause: DC bus undervoltage.



Remedy:

  • Check the mains supply.