Toshiba S15 Drives

Toshiba S15 Drives Fault Codes:

Fault Code and MeaningCause and Remedy
E / 0011
Emergency stop
Cause:

During automatic operation or remote operation, an emergency stop command is entered from the operation panel or an external (terminal or communication).



Remedy:


  • Reset the inverter.

  • If the emergency stop signal is input, reset after releasing this signal.
E-13 / 002D
Over speed fault
Cause:

The input voltage fluctuates abnormally; Over speed fault due to the overvoltage limit operation; When Pt=6, the inverter started without connecting the PM motor.



Remedy:


  • Check the input voltage.

  • Install an optional dynamic braking resistor (optional).

  • Connect the PM motor or change Pt setting.
E-18 / 0032
Analog input break detection fault
Cause:

The input signal from VIC is equal to or less than the F633 setting.



Remedy:


  • Check the VIC signal cable for breaks.

  • Check the input signal value or setting of F633.
E-19 / 0033
CPU communications error
Cause:

A communications error occurs between control CPUs.



Remedy:


  • Contact your Toshiba distributor.
E-20 / 0034
Over torque boost fault
Cause:

The automatic torque boost parameter F402 setting is too high; The motor has too small impedance.



Remedy:


  • Set a lower automatic torque boost parameter F402 setting.

  • Make an auto-tuning.
E-21 / 0035
CPU fault 2
Cause:

The control CPU is defective.



Remedy:


  • Contact your Toshiba distributor.
E-23 / 0037
Optional unit fault 2
Cause:

An optional device is defective.



Remedy:


  • Contact your Toshiba distributor.
E-26 / 003A
CPU fault 3
Cause:

The control CPU detected a fault.



Remedy:


  • Reset the inverter. The cause can be surrounding noise. If the problem is not solved, contact your Toshiba distributor.
E-31 / 003F
Heavy cycle of main power ON/OFF
Cause:

Main power ON/OFF during running is repeated frequently; Initial failure if it is caused by other reasons.



Remedy:


  • Reduce the frequency of repetition of main power ON/OFF during running.

  • Contact your Toshiba distributor.
E-32 / 0040
PTC fault
Cause:

PTC thermal protection is occurred.



Remedy:


  • Check the PTC in motor.
E-37 / 0045
Servo lock fault
Cause:

The motor shaft is not locked in servo lock operation.



Remedy:


  • Reduce the load in servo lock operation.
E-39 / 0047
Auto-tuning error (PM motor)
Cause:

When auto-tuning (relating parameters are Pt=6, F400=2), the current of the permanent magnet motor exceeded the threshold level; The inductance of permanent magnet motor is too small; The motor is not connected.



Remedy:


  • Auto tuning for permanent magnet motor is not allowed for this motor, please measure inductance with the LCR meter etc.

  • Set V/F control mode selection Pt = 0, for operation check without connecting motor.
EEP1 / 0012
EEPROM fault 1
Cause:

The EEPROM writing error occurs.



Remedy:


  • Turn off the inverter, then, turn it again. If it does not recover from the error, contact your Toshiba distributor.
EEP2 / 0013
EEPROM fault 2
Cause:

typ operation is aborted by the power-off etc; The EEPROM reading error occurs.



Remedy:


  • Turn off the inverter, then, turn it again, and then try typ operation again.

  • Turn off the inverter, then, turn it again. If it does not recover from the error, contact your Toshiba distributor.
EEP3 / 0014
EEPROM fault 3
Cause:

The EEPROM is defective.



Remedy:


  • Contact your Toshiba distributor.
EF2 / 0022
Ground fault
Cause:

A ground fault occurs in the output cable or the motor; A ground fault occurs in dynamic braking resistor; When inverters are fed by AC power supply and connected with common DC bus link, unnecessary trip occurs.



Remedy:


  • Check the cable and the motor for ground faults.

  • Set the parameter F614 to 0 “Disabled”.
EPH1 / 0008
Input phase failure
Cause:

A phase failure occurred in the input line of the main circuit; The capacitor in the main circuit lacks capacitance.



Remedy:


  • Check the main circuit input line for phase failure.

  • Check the capacitor in the main circuit for exhaustion.
EPH0 / 0009
Output phase failure
Cause:

A phase failure occurred in the output line of the main circuit; The motor has too big impedance.



Remedy:


  • Check the main circuit output line, motor, etc. for phase.

  • Select output phase failure detection parameter F605. When Pt = 6 and F915 = 3 to 4, output phase failure detection is valid regardless of F605 setting.
ERR2 / 0015
Main unit RAM fault
Cause:

The control RAM is defective.



Remedy:


  • Contact your Toshiba distributor.
ERR3 / 0016
Main unit ROM fault
Cause:

The control ROM is defective.



Remedy:


  • Contact your Toshiba distributor.
ERR4 / 0017
CPU fault 1
Cause:

The control CPU is defective.



Remedy:


  • Contact your Toshiba distributor.
ERR5 / 0018
Communication error
Cause:

The communication with external devices is broken off.



Remedy:


  • Check the remote control device, cables, etc.
ERR7 / 001A
Current detector fault
Cause:

The current detector is defective.



Remedy:


  • Contact your Toshiba distributor.
ERR8 / 001B
Optional unit fault 1
Cause:

An optional unit has failed (such as a communication option).



Remedy:


  • Check the connection of optional unit.
ERR9 / 001C
Remote keypad disconnection fault
Cause:

After run signal is activated by RUN key of the remote keypad, disconnection is occurred in 10 seconds or more.



Remedy:


  • In case the remote keypad is disconnected, press STOP key before.

  • This fault is disabled by F731=1 setting.
ETN / 0028
ETN1 / 0054
ETN2 / 0055
ETN3 / 0056
Auto-tuning error
Cause:

The motor parameter uL, uLu, F405, F415, F417 are not set correctly; The motor with the capacity of 2 classes or less than the inverter is used; The output cable is too thin; The motor is not connected; Power supply of main circuit does not turn on; The motor is rotating; Parameter Pt=6 is set and High speed motor is connected.



Remedy:


  • Set the left column parameters correctly as a motor name plate and make an auto-tuning again.

  • Set parameter F416 to smaller 70% of the present value, and execute the auto-tuning again.

  • Set F400=1 when trip occurs.

  • Connect the motor.

  • Check whether the secondary magnetic contactor is on.

  • Turn on power supply of main circuit.

  • Make an auto-tuning again after the rotation of the motor stops.

  • Choose the higher power range drive.
ETYP / 0029
Inverter type error
Cause:

It may be a breakdown failure.



Remedy:


  • Contact your Toshiba distributor.
OC1 / 0001
Overcurrent during acceleration
Cause:

The acceleration time ACC is too short; The V/F setting is improper; A restart signal is input to the rotating motor after a momentary stop; A special motor (small impedance) is used; Low inductance motor (High speed motor); Connecting cable length is long.



Remedy:


  • Increase the acceleration time ACC.

  • Check the V/F parameter setting.

  • Use F301 (auto-restart) and F302 (ride-through control).

  • In case of Pt=0, 1, 7, decrease ub. In case of Pt=2 to 6, set F415 and make an auto-tuning.

  • Choose the higher power range drive.

  • AC reactors etc. are required for the output side.
OC2 / 0002
Overcurrent during deceleration
Cause:

The deceleration time dEC is too short; Low inductance motor (High speed motor) is used; The connecting cable length is long.



Remedy:


  • Increase the deceleration time dEC.

  • Choose the higher power range drive.

  • AC reactors etc. are required for the output side.
OC3 / 0003
Overcurrent during constant speed operation
Cause:

The load fluctuates abruptly; The load is in an abnormal condition; Low inductance motor (High speed motor) is used; The connecting cable length is long.



Remedy:


  • Reduce the load fluctuation.

  • Check the load (operated machine).

  • Choose the higher power range drive.

  • AC reactors etc. are required for the output side.
OCA / 0005
Overcurrent at start-up
Cause:

A main circuit element is defective.



Remedy:


  • Contact your Toshiba distributor.
OCL / 0004
Overcurrent (load side at start-up)
Cause:

The insulation of the output main circuit or motor is defective; The motor has too small impedance.



Remedy:


  • Check the secondary wiring and insulation state.

  • Set F613=2, 3.
OH / 0010
Overheat
Cause:

The cooling fan reaches the end of life or has a fault; The ambient temperature is too high; The vent is blocked up; A heat generating device is installed close to the inverter; The load is large; The temperature sensor has a fault.



Remedy:


  • The fan requires replacement if it does not rotate.

  • Operate at a specified ambient temperature.

  • Secure sufficient space around the inverter.

  • Reduce the load or reduce F300 (PWM carrier frequency).

  • Contact your Toshiba distributor if sensor is faulty.
OH2 / 002E
Thermal fault stop command from external device
Cause:

A thermal trip command (input terminal function: 46 or 47) is issued by an external control device.



Remedy:


  • The motor is overheated, so check whether the current flowing into the motor exceeds the rated current.
OL1 / 000D
Inverter overload
Cause:

The acceleration time ACC is too short; The DC braking amount is too large; The V/F setting is improper; A restart signal is input to the rotating motor; The load is too large.



Remedy:


  • Increase the acceleration time ACC.

  • Reduce the DC braking amount F251 and time F252.

  • Check the V/F parameter setting.

  • Use F301 (auto-restart) and F302 (ride-through control).

  • Use an inverter with a larger rating or reduce F300 (PWM carrier frequency).
OL2 / 000E
Motor overload
Cause:

The V/F setting is improper; The motor is locked up; Low-speed operation is performed continuously; An excessive load is applied to the motor.



Remedy:


  • Check the V/F parameter setting.

  • Check the load (operated machine).

  • Adjust OLM to the overload that the motor can withstand during operation in a low speed range.
OL3 / 003E
Main module overload
Cause:

The carrier frequency is high and load current has increased at low speeds (mainly at 15Hz or less).



Remedy:


  • Raise the operation frequency.

  • Reduce the load.

  • Reduce F300 (PWM carrier frequency).

  • Set carrier frequency control mode selection F316 to 1, 3 or 5.
OLR / 000F
Dynamic braking resistor overload trip
Cause:

The deceleration time is too short; Dynamic braking is too large.



Remedy:


  • Increase the deceleration time dEC.

  • Increase the capacity of dynamic braking resistor (wattage) and adjust PBR capacity parameter F309.
OP1 / 000A
Overvoltage during acceleration
Cause:

The input voltage fluctuates abnormally; A restart signal is input to the rotating motor after a momentary stop.



Remedy:


  • Insert a suitable input reactor.

  • Use F301 (auto-restart) and F302 (ride-through control).
OP2 / 000B
Overvoltage during deceleration
Cause:

The deceleration time dEC is too short (Regenerative energy is too large); Overvoltage limit operation F305 is set to 1 (Disabled); Input voltage fluctuates abnormally.



Remedy:


  • Increase the deceleration time dEC.

  • Set overvoltage limit operation F305 to 0, 2, 3.

  • Insert a suitable input reactor.
OP3 / 000C
Overvoltage during constant speed operation
Cause:

The input voltage fluctuates abnormally; The motor is in a regenerative state because the load causes the motor to run at a frequency higher than the inverter output frequency.



Remedy:


  • Insert a suitable input reactor.

  • Install an optional dynamic braking resistor (optional).
OT / 0020
Over-torque trip 1
Cause:

Over-torque reaches to a detection level during operation.



Remedy:


  • Enable F615 (over-torque trip selection).

  • Check system error.
OT2 / 0041
Over-torque trip 2
Cause:

Output current reached F601 or more and maintain in F452 during power running.



Remedy:


  • Reduce the load.

  • Increase the stall prevention level or power running torque limit level.
OTC3 / 0048
Over-torque / Overcurrent fault
Cause:

Power running torque or output current reached F593 or more and maintain in F595 during power running.



Remedy:


  • Enable F591.

  • Reduce the load.

  • Check system error.
PRF / 003B
Safe torque off error
Cause:

Error of safe torque off circuit.



Remedy:


  • Contact your Toshiba distributor.
SOUT / 002F
Step-out (for PM motor drive only)
Cause:

The motor shaft is locked; One output phase is open; An impact load is applied; Using the DC braking function.



Remedy:


  • Unlock the motor shaft.

  • Check the interconnect cables between the inverter and the motor.

  • Prolong the acceleration / deceleration time.

  • Turn off the Step-out function when using the DC braking function or change the DC braking to Servo lock function.
UC / 001D
Low-current operation fault
Cause:

The output current decreased to a low-current detection level during operation.



Remedy:


  • Enable F610 (low-current detection).

  • Check the suitable detection level for the system (F609, F611, F612).
UP1 / 001E
Undervoltage fault (main circuit)
Cause:

The input voltage (in the main circuit) is too low.



Remedy:


  • Check the input voltage.

  • Enable F627 (undervoltage trip selection).

  • To take measures to momentary power failure, set F627=0, Regenerative power ride-through control F302 and Auto-restart control selection F301.
UTC3 / 0049
Small-torque / Small-current fault
Cause:

Power running torque or output current decreased F593 or less and maintain in F595 during power running.



Remedy:


  • Enable F591.

  • Check system error.
A-01
Points setting alarm 1
Cause:

In case of Pt=7, there are same setting value at least two on parameter uL, F190, F192, F194, F196, or F198 except 0.0Hz.



Remedy:


  • Set the points to different values.
A-02
Points setting alarm 2
Cause:

In case of Pt=7, the inclination of V/f is too high.



Remedy:


  • Set the inclination of V/f to be flat.
A-05
Output frequency upper limit
Cause:

An attempt was made to operate at a frequency higher than 10 times the base frequency (uL or F170).



Remedy:


  • Operate at a frequency within 10 times the base frequency.
A-17
Operation panel key alarm
Cause:

The RUN or STOP key is held down for more than 20 seconds; The RUN or STOP key is faulty.



Remedy:


  • Check the operation panel.
A-18
Break in analog signal cable
Cause:

The signal input via VIC is below the analog signal detection level set with F633.



Remedy:


  • Check the cables for breaks. And check the setting of input signal or setting value of F633.
A-28
S3 terminal alarm
Cause:

Slide switch SW2 and parameter F147 settings are different.



Remedy:


  • Match the settings of SW2 and F147. Power supply OFF and ON after these settings.
EOFF
Emergency stop command acceptable
Cause:

The operation panel is used to stop the operation in automatic control or remote control mode.



Remedy:


  • Press the STOP key for an emergency stop. To cancel the emergency stop, press any other key.
MOFF
Undervoltage in main circuit
Cause:

The supply voltage between R, S and T is under voltage; Internal communication fault.



Remedy:


  • Measure the main circuit supply voltage. If the voltage is at a normal level, the inverter requires repairing for fault.
PRA
STO signal OFF
Cause:

STO terminal is in open-circuit; Input voltage of STO terminal is low; The voltage of P24 terminal decreases.



Remedy:


  • Close STO and + SU circuit.

  • Check the load of P24 terminal.

  • Check the polarity of the surge absorption diode.
RTRY
Retry in process
Cause:

The inverter is in process of retry. A momentary stop occurred.



Remedy:


  • The inverter restarts automatically. Be careful of the machine because it may suddenly restart.
TUN / TUN1 / TUN2 / TUN3
Learning / Tuning errors
Cause:

Errors in brake sequence learning or light-load high-speed learning operations; Load too heavy; Motor constants not entered correctly.



Remedy:


  • To cancel learning, suspend it and set learning parameters F329 to 0.

  • Check whether the learning operation is performed correctly.

  • Check the load and motor constant settings.
C / P / L / H
Pre-alarms
Cause:

Overcurrent, Overvoltage, Overload, or Overheat pre-alarm levels have been reached.



Remedy:


  • Refer to remedies for OC (Overcurrent), OP (Overvoltage), OL (Overload), or OH (Overheat).