Toshiba AS3 Drives

Toshiba AS3 Drives Fault Codes:

Fault Code and MeaningCause and Remedy
E (17)
Emergency off
Cause: Emergency off is input.

1) When a run command is other than the operation panel, [STOP/RESET] key was pressed twice.

2) A signal was input to the input terminal in which emergency off is assigned.

3) Emergency off is input from communication.



Remedy:

  • Reset after solving problems.

  • Clear the emergency off signal.
E-11 (43)
Brake answer error
Cause: The system does not reply even after the setting time in elapsed.



Remedy:

  • Check the system.

  • Check if the setting is correct. When not used, set =”0.0: Disabled”.
E-12 (44)
PG error
Cause: 1) PG is disconnected.
2) Error exists in PG wiring.
3) PG voltage is improper.



Remedy:

  • Check the PG wiring.

  • Check if the PG settings are correct (, ).
E-13 (45)
Abnormal speed error
Cause: 1) When = “0” to “9”, an over speed condition occurred.

2) When = “10” to “11”, over speed continued by PG failure, etc.

3) Due to overvoltage limit operation, the output frequency exceeded limits.

4) Speed control gain is so small that motor speed is overshoot.

5) Motor operated without PM motor connected.



Remedy:

  • Check whether a problem exists in input voltage.

  • When the regenerative energy is large, install a braking resistor (option).

  • Check the PG wiring and setting.

  • Increase (adjust) setting.

  • Connect the PM motor or set = “0”.
E-18 (50)
Analog input disconnecting
Cause: The input level of the terminal [II] became the setting value or less of .



Remedy:

  • Check that the signal line connected to the terminal [II] is not disconnected.

  • Check if the setting is correct.
E-19 (51)
CPU communication error
Cause: Communication error between control CPU.



Remedy:

  • Turn off the power and then turn it on again.

  • If the error occurs again, contact your Toshiba distributor.
E-20 (52)
Over torque boost
Cause: The setting value of the is very high or impedance on the motor is low.



Remedy:

  • Set the motor parameters according to the motor characteristic, and perform auto-tuning.

  • Check base frequency (), voltage (), rated capacity (), rated current (), etc.
E-21 (53)
CPU1 fault B
Cause: Control CPU fault.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
E-22 (54)
Embedded Ethernet fault
Cause: Fault in the embedded Ethernet.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
E-23 (55)
Option fault (slot A)
Cause: I/O extension attached on slot A/B/C error, abnormality on option connection, or ambient temperature out of range.



Remedy:

  • Remove 1 of the I/O extension 1 (ETB013Z) or I/O extension 2 (ETB014Z).

  • Make sure the option is inserted into slot A properly.

  • Turn off the inverter power and make it cool down.

  • If the trip occurs again after power reset, contact your Toshiba distributor.
E-24 (56)
Option fault (slot B)
Cause: Abnormality on option connection, incorrect PG settings, or ambient temperature issue.



Remedy:

  • Remove I/O extension.

  • Check setting.

  • Make sure the option is inserted into slot B properly.

  • Turn off the inverter power and make it cool down.
E-25 (57)
Option fault (slot C)
Cause: Abnormality on option connection or ambient temperature issue.



Remedy:

  • Make sure the option is inserted into slot C properly.

  • Turn off the inverter power and make it cool down.
E-26 (58)
CPU2 fault
Cause: Control CPU fault.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
E-29 (61)
Control power option failure
Cause: Failure on the control power supply option or setting is improper.



Remedy:

  • Check input voltage of control power supply.

  • If control power supply option is not used, set = “0”.

  • Contact Toshiba distributor.
E-31 (63)
Rush current suppression relay fault
Cause: Fault on the rush current suppression relay or power was turned ON/OFF frequently.



Remedy:

  • Fault in internal inverter. Contact Toshiba distributor.

  • Instead of turning ON/OFF with power supply, turn ON/OFF with a run command.
E-32 (64)
PTC failure
Cause: PTC protection for the motor became enabled or Failure in the PTC circuit.



Remedy:

  • Check the motor and PTC.

  • Failure in internal inverter. Contact your Toshiba distributor.
E-37 (69)
Servo lock error
Cause: The lock up torque or more external load is applied to the motor or setting of motor parameters is improper.



Remedy:

  • Reduce the load to apply the servo lock.

  • Set the motor parameters according to the motor characteristic, and perform auto-tuning.
E-38 (70)
Communication time-out of Braking unit PB7-4132K
Cause: Cable disconnected, bad location, or braking unit failed.



Remedy:

  • Check the cable linked VF-AS3 to the braking unit.

  • Correct the cable path.

  • Turn off the power and then turn it on again.
E-39 (71)
PM control error
Cause: During auto-tuning or initial position, the motor current became very high.



Remedy:

  • Measure inductance with a LCR meter, etc., and set to the parameter directly.
E-42 (74)
Cooling fan fault
Cause: The cooling fan failed.



Remedy:

  • The cooling fan needs to be replaced. Contact your Toshiba distributor.
E-43 (75)
Communication time-out (embedded Ethernet)
Cause: Embedded Ethernet communication timed out.



Remedy:

  • Check the Ethernet communication equipment and wiring.
E-44 (76)
Battery of panel failure
Cause: Calendar function activated, but battery is missing, low, or time not synchronized.



Remedy:

  • Put a battery.

  • Replace the battery.

  • Reset the inverter with operation panel installed.
E-45 (77)
GD2 auto-tuning error
Cause: Value of F459 is not fixed, estimated value is out of range, or upper limit frequency issue.



Remedy:

  • Modify the value of F481, F482 and do the tuning again.

  • Modify F480 to 0, and set F459 manually.
E-46 (78)
Preparation signal cut during position control
Cause: Position preparation signal was turned OFF during position control or near point dog start signal issue.



Remedy:

  • Check position preparation signal is kept until position control is completed.

  • Check near point dog start signal is kept until 0 point recovery is completed.
E-47 (79)
Position detection upper limit excess
Cause: Current position exceeded upper limit or electronic gear ratio exceeds limitation.



Remedy:

  • Check the limit range parameters (A518, A519, A520 and A521).

  • Check the ratio of (A524/A525) is in the range of 1/20 to 50.
E-48 (80)
Braking unit PB7-4132K internal fault
Cause: An internal error occurred in Braking unit PB7-4132K.



Remedy:

  • Turn off the power and then turn it on again.

  • If the fault occurs again, contact your Toshiba distributor.
E-99 (88)
Trip for test
Cause: Trip for test occurred.



Remedy:

  • Reset if no problem is found.
EEP1 (18)
EEPROM fault 1
Cause: Fault occurred during internal data writing.



Remedy:

  • Turn off the power and then turn it on again.

  • If the fault occurs again, contact your Toshiba distributor.
EEP2 (19)
EEPROM fault 2
Cause: Power failure during writing or fault during internal data writing.



Remedy:

  • Set again.

  • Turn off the power and then turn it on again.
EEP3 (20)
EEPROM fault 3
Cause: Fault occurred during internal data reading.



Remedy:

  • Turn off the power and then turn it on again.

  • If the fault occurs again, contact your Toshiba distributor.
EF2 (34)
Grounding fault
Cause: Grounding fault occurred in the output wiring or the motor.



Remedy:

  • Check grounding fault in the wiring on the output side and the motor.

  • Increase the acceleration/deceleration time.
EPHI (8)
Input phase loss
Cause: Input side phase has failed.



Remedy:

  • Check phase failure in the wiring on the input side.
EPHO (9)
Output phase loss
Cause: Output side phase has failed or output current is quite small.



Remedy:

  • Check phase failure in the wiring on the output side.

  • Set to 0.
Err2 (21)
RAM fault
Cause: Control RAM fault.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
Err3 (22)
ROM fault
Cause: Control ROM fault.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
Err4 (23)
CPU1 fault A
Cause: Control CPU fault.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
Err5 (24)
Communication time-out (RS485)
Cause: RS485 communication timed out.



Remedy:

  • Check the communication equipment and wiring on RS485 communication.
Err6 (25)
Gate array fault
Cause: Fault in the gate array.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
Err7 (26)
Current detector fault
Cause: Fault in the output current detector.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
Err8 (27)
Communication time-out (option)
Cause: Communication option timed out.



Remedy:

  • Check the communication equipment and wiring on communication option.
Err9 (28)
Panel disconnection during run
Cause: While running, the cable connecting the inverter and panel are disconnected.



Remedy:

  • Check the connection on the inverter and panel.
Etn (40)
Auto-tuning error
Cause: Motor parameter does not match, auto-tuning executed while rotating, or output frequency does not increase.



Remedy:

  • Set the motor parameters according to the motor characteristic.

  • Check that the motor is stopped, and perform auto-tuning again.
Etn1 (84)
Auto-tuning error 1
Cause: Motor not connected or improper value in induction motor settings.



Remedy:

  • Check that the motor is connected.

  • Set according to the motor rating.
Etn2 (85)
Auto-tuning error 2
Cause: The motor parameter does not match the motor characteristic.



Remedy:

  • Set the motor parameters according to the motor characteristic (, , , etc).
Etn3 (86)
Auto-tuning error 3
Cause: or does not match motor rating or power is not supplied.



Remedy:

  • Set or according to the motor rating.

  • Supply the power.
EtyP (41)
Inverter type error
Cause: Internal error exists or PCB replaced.



Remedy:

  • Error in internal inverter. Contact Toshiba distributor.

  • Set = “6: Initialize typeform”.
OC1 (1)
Overcurrent (during acceleration)
Cause: Acceleration time too short, V/f pattern mismatch, momentary power failure, special motor used, short circuit, or grounding fault.



Remedy:

  • Increase acceleration time ().

  • Set according to machinery.

  • Set Auto-restart.

  • Perform auto-tuning.

  • Change inverter to large capacity.

  • Check motor/cable for grounding faults.
OC2 (2)
Overcurrent (during deceleration)
Cause: Deceleration time too short, low inductance motor, or short circuit.



Remedy:

  • Increase deceleration time ().

  • Change inverter to large capacity.

  • Check motor/cable for grounding faults.
OC3 (3)
Overcurrent (during constant speed)
Cause: Load changed rapidly, machinery error, or output short circuit.



Remedy:

  • Suppress load fluctuation.

  • Check machinery.

  • Change inverter to large capacity.

  • Check motor/cable for grounding faults.
OCA1 (5)
Overcurrent (U-phase arm)
Cause: Fault on IGBT in U-phase.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
OCA2 (6)
Overcurrent (V-phase arm)
Cause: Fault on IGBT in V-phase.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
OCA3 (7)
Overcurrent (W-phase arm)
Cause: Fault on IGBT in W-phase.



Remedy:

  • Fault in internal inverter. Contact your Toshiba distributor.
OCL (4)
Overcurrent (load side at startup)
Cause: Short circuit on output side, defective insulation, or low impedance.



Remedy:

  • Check wiring and insulation on output side.

  • Set to “2” or “3”.
OCr (36)
Overcurrent (Braking resistor)
Cause: Braking resistor/unit issue, short circuit between [PB] and [PC/-], or IGBT fault.



Remedy:

  • Check if adequate braking resistor is connected.

  • If not used, set “Disabled” in .

  • Fault in internal inverter. Contact Toshiba distributor.
OH (16)
Overheat
Cause: Cooling fan not working, high ambient temp, blocked vent, or nearby heating units.



Remedy:

  • Replace cooling fan if not working.

  • Lower ambient temperature.

  • Clear vents.

  • Place other heating units away.
OH2 (46)
External thermal trip
Cause: A signal of external thermal trip is input.



Remedy:

  • Check that the motor is not overloaded.
OL1 (13)
Overload (Inverter)
Cause: Sudden acceleration, V/f pattern mismatch, momentary power failure, or large DC braking amount.



Remedy:

  • Increase acceleration time.

  • Set according to machinery.

  • Set Auto-restart.

  • Change the inverter to large capacity.
OL2 (14)
Overload (Motor)
Cause: Motor locked up, low-speed operation, overloaded, or electronic thermal setting mismatch.



Remedy:

  • Check the machinery.

  • Set the electronic thermal according to the motor.

  • Set according to machinery.
OL3 (62)
Overload (IGBT)
Cause: Low-speed range with high carrier frequency or momentary power failure.



Remedy:

  • Reduce the load.

  • Set to lower.

  • Increase output frequency.

  • Set Auto-restart.
OLr (15)
Overload (Braking resistor)
Cause: Braking rate is large or deceleration time is short.



Remedy:

  • Increase deceleration time ().

  • Change braking resistor to larger capacity and set .
OP1 (10)
Overvoltage (during acceleration)
Cause: Input voltage high/abnormal fluctuation, power factor capacitor opened/closed, or thyristor equipment connected.



Remedy:

  • Install input AC reactor (option).

  • Set .
OP2 (11)
Overvoltage (during deceleration)
Cause: Deceleration time short, regenerative energy large, or input voltage high.



Remedy:

  • Increase deceleration time.

  • Install braking resistor.

  • Install input AC reactor.
OP3 (12)
Overvoltage (during constant speed)
Cause: Input voltage high, power factor capacitor issues, or motor rotated by load (regenerative status).



Remedy:

  • Install input AC reactor.

  • Disconnect grounding capacitor.

  • Install a braking resistor.
Ot (32)
Overtorque
Cause: The load torque reached the overtorque level during run.



Remedy:

  • Check the load side.

  • Check the overtorque detection setting (, etc).
Ot2 (65)
Overtorque 2
Cause: Output current or power running torque reached the stall prevention level.



Remedy:

  • Reduce the load.

  • Lower the detection level of or .
OtC3 (72)
Overtorque/Overcurrent
Cause: Overtorque or overcurrent on the shock monitoring function was detected.



Remedy:

  • Check the load.

  • Check shock monitoring function settings ( to ).
PrF (59)
STO circuit fault
Cause: Different input level between [STOA] and [STOB] or Fault in Safe Torque Off circuit.



Remedy:

  • Check wiring and screw tightening on terminals.

  • Fault inside the inverter. Contact Toshiba distributor.
SOUT (47)
PM step-out
Cause: Load changed rapidly, sudden acceleration, motor shaft locked, or output phase failed.



Remedy:

  • Increase acceleration/deceleration time.

  • Check motor and release lock.

  • Check wiring on output side.
UC (29)
Undercurrent
Cause: Output current declined to undercurrent detection level.



Remedy:

  • Check the load.

  • Check undercurrent detection settings (, ).
UP1 (30)
Undervoltage (Power circuit)
Cause: The input voltage (power circuit) declined.



Remedy:

  • Check input voltage.

  • Check undervoltage detection settings.

  • To avoid trip, set =”0″ and enable Auto-restart/Ride-through.
Ut (60)
Undertorque
Cause: The load torque reached the undertorque level during run.



Remedy:

  • Check the load side.

  • Check undertorque detection settings (, etc).
UtC3 (73)
Undertorque/Undercurrent
Cause: Undertorque or undercurrent on the shock monitoring function was detected.



Remedy:

  • Check the load.

  • Check shock monitoring settings.
A-09
Panel disconnection alarm
Cause: Cable connecting inverter and panel disconnected during run.



Remedy:

  • Check the connection on the inverter and panel.
A-17
Key failure alarm
Cause: [RUN] or [STOP/RESET] key pressed for 20+ seconds or panel key failed.



Remedy:

  • Check the operation panel.

  • If failure recurs, contact Toshiba distributor.
A-18
Analog input disconnection alarm
Cause: Input level of terminal [II] became less than setting value.



Remedy:

  • Check signal line to terminal [II].

  • Check setting.
A-29
Control power supply option alarm
Cause: Voltage between [+SU] and [CC] is low or setting incorrect.



Remedy:

  • Check voltage of control power supply (20Vdc or more required).

  • If option not used, set = “0”.
A-43
Communication alarm (Ethernet)
Cause: Condition very close to communication time out.



Remedy:

  • Perform same measures as “E-43”.
COFF
Control power option alarm
Cause: Undervoltage on control power supply input or setting incorrect.



Remedy:

  • Check voltage of control power supply.

  • If option not used, set =”0″.

  • Turn power OFF once, and reset.
MOFF
Undervoltage alarm
Cause: Input voltage (power circuit) declined.



Remedy:

  • Check input voltage.

  • If no problem found, internal error may be issue. Contact Toshiba distributor.
PrA
STO activated
Cause: Open state between [STOA]/[STOB] and [PLC], 24V overload, or SW1 setting.



Remedy:

  • Check for short circuit between [STOA]-[STOB]-[PLC].

  • Check 24V load.

  • Check SW1 position.
t
Communication alarm (RS485)
Cause: Condition very close to communication time out.



Remedy:

  • Perform same measures as “Err5” and “Err8”.
tUn1
Brake learning error
Cause: Load heavy, parameter setting improper, or braking operation abnormal.



Remedy:

  • Perform learning with no load or light load.

  • Set motor parameters and learning related parameters in advance.

  • Check the brake.
Overcurrent alarm
Cause: Current flows at or higher than over current stall prevention level.



Remedy:

  • Perform same measures as “OC1”, “OC2”, and “OC3”.
Overheat alarm
Cause: Overheat protection pre-alarm level reached or PTC detection temperature reached.



Remedy:

  • Perform same measures as “OH” or “E-32”.
Motor overload alarm / Inverter overload alarm
Cause: Cumulative overload reaches 50% or more of trip value.



Remedy:

  • Perform same measures as “OL1”, “OL2”, and “OL3”.
Overvoltage alarm
Cause: Voltage generated at or higher than stall prevention level.



Remedy:

  • Perform same measures as “OP1”, “OP2”, and “OP3”.
9999
Invalid set up by customized display function
Cause: Invalid value in or .



Remedy:

  • Correct the or value.
A-01
V/f 5-point setting error 1
Cause: V/f 5-point setting error (two or more set to same value other than 0.0 Hz).



Remedy:

  • Set different value on each parameter.
A-02
V/f 5-point setting error 2
Cause: Inclination of V/f is large.



Remedy:

  • Set V/f 5-point and / for the V/f inclination to be gentle.
A-05
Base frequency setting error
Cause: Tries to run in frequency over 10 times of the base frequency.



Remedy:

  • Check that the base frequency setting is correct.

  • Operate in frequency within 10 times of base frequency.
Atn
During auto tuning
Cause: Auto-tuning in progress.



Remedy:

  • No problem if message disappears after several seconds.
CLr
Reset command acceptable
Cause: The following was operated after trip is occurring: Pressed [STOP] or Set reset terminal ON.



Remedy:

  • Reset is performed by pressing [STOP] key again or setting reset terminal OFF.
dAtA
No message into LED display
Cause: “30” is set in without any message.



Remedy:

  • Change setting of parameter .
dbOn
During motor shaft fixing
Cause: Motor shaft fixing in progress.



Remedy:

  • Indicates motor fixing control. Stops when standby turned OFF.
E1 / E2 / E3
Panel display digit overflow
Cause: The display digit on the operation panel overflowed by one, two, or three digits.



Remedy:

  • (Information only).
EOFF
Emergency off command acceptable
Cause: Run command is other than panel, [STOP/RESET] key pressed once.



Remedy:

  • To apply emergency off, press [STOP] key again.
Err1
Frequency point setting error
Cause: The setting on point 1 and point 2 of the frequency command is close.



Remedy:

  • Set apart point 1 and point 2 of the frequency command.
FAIL
Password failure
Cause: Entered number in does not match .



Remedy:

  • (Check password).
FIrE
During Fire speed run
Cause: Fire speed run/Forced run is in progress.



Remedy:

  • Stops when turning the power OFF.
Init
During Initializing
Cause: Initialization or Region setting is in progress.



Remedy:

  • No problem if the display shows “0.0” after several seconds.
nErr
No error
Cause: No trip records in the past trip history on [Monitor mode].



Remedy:

  • (Information only).
OFF
Standby OFF
Cause: The input terminal with assigned standby is OFF.



Remedy:

  • (Information only).
PASS
Password coincidence
Cause: Entered number in matched .



Remedy:

  • (Information only).
SEt
Region setting acceptable
Cause: Display at first power on or after setting =”0″.



Remedy:

  • Set a region to use in the setup menu.
StOP
During deceleration stop at power failure
Cause: Deceleration stop at power failure in progress.



Remedy:

  • The stop state is kept until the run command is turned OFF.
Undo
All key unlocked
Cause: When “Locked”, pressed [OK] key for five seconds or more.



Remedy:

  • The key operation on the operation panel is temporarily valid.
Connecting
Connection abnormality
Cause: Connection is not correct or Communication abnormality.



Remedy:

  • Check connection between operation panel and inverter body.

  • Check extended cable.

  • Check parameter setting (F801 to F809).