Toshiba Q9 Drives

Toshiba Q9 Drives Fault Codes:

Fault Code and MeaningCause and Remedy
Atn
Autotune active.
Cause:

  • Autotune function is currently running.




Remedy:

  • Indication only; no action required.
ETN
Autotuning error.
Cause:

  • Autotune readings significantly inconsistent with configuration.

  • A non-3-phase motor is being used.

  • Improper settings at F400 or F410 to F413.

  • Motor rating significantly smaller than ASD rating.

  • Output cabling too small, too long, or EMF interference.

  • Motor is running during Autotune.




Remedy:

  • Verify motor wiring and type.

  • Check and adjust parameters F400 and F410-F413.

  • Ensure motor is stopped before tuning.
ETN1
Autotuning error — Torque boost error.
Cause:

  • Improper setting at F410.




Remedy:

  • Correct setting F410.
ETN2
Autotuning error — Leak inductance error.
Cause:

  • Improper setting at F412.




Remedy:

  • Correct setting F412.
ETN3
Autotuning error — Motor rating error.
Cause:

  • Improper setting at F405, F406, or F407.




Remedy:

  • Correct settings F405, F406, or F407.
ETYP
Typeform error.
Cause:

  • Firmware information inconsistent between Application Board and Motor Control board.

  • Application Board or Motor Control board is defective.




Remedy:

  • Perform a Typeform Reset.

  • Replace defective board if reset fails.
4-20 mA
4-20 Signal Loss.
Cause:

  • Misconnection, poor connection, or broken wire.

  • Improper programming at F201 and associated parameters.




Remedy:

  • Check wiring continuity.

  • Verify parameter F201.
CM1
Internal communications error.
Cause:

  • Improperly programmed ASD.

  • Improper communications settings.




Remedy:

  • Check communications programming.
CM2
External communications error.
Cause:

  • Improperly connected cables.




Remedy:

  • Secure and check external cable connections.
COFF
Under-voltage condition at optional Control power supply.
Cause:

  • Misconnection, poor connection, or broken wire.

  • Defective power supply.




Remedy:

  • Check wiring.

  • Replace power supply if defective.
DAMP
Damper closed.
Cause:

  • Improper configuration/programming for Damper Control at discrete input terminals.




Remedy:

  • Check discrete input terminal configuration.
Emergency Off
Output signal terminated/Brake applied.
Cause:

  • Stop-Reset pressed twice at the EOI.

  • EOFF command received remotely.




Remedy:

  • ASD reset required.
HLD
Heavy load — motor/ASD overloaded.
Cause:

  • Accel setting is too short.

  • ASD/Motor not right-sized for application.

  • Excessively fluctuating load.




Remedy:

  • Increase Accel time.

  • Verify motor/drive sizing.
LLD
Light load.
Cause:

  • ASD/Motor should be right-sized for application.




Remedy:

  • Verify load matches drive capacity.
LLT
Lower-limit time.
Cause:

  • Parameter F256 adjustment required.




Remedy:

  • Adjust parameter F256.
LTA
Part replacement alarm.
Cause:

  • Part Replacement Alarm activation as set at F634.




Remedy:

  • Perform scheduled maintenance/replacement.
MOFF
Main under-voltage condition.
Cause:

  • Low 3-phase commercial power voltage level.




Remedy:

  • Check input power supply voltage.
OC
Over-Current — ASD output > F601.
Cause:

  • Phase-to-phase short (U, V, or W).

  • Defective IGBT.

  • Output cabling connected incorrectly.

  • Restarting into a spinning motor (no catch-spin).

  • Motor/machine jammed or brake engaged.

  • Accel/Decel too short or Voltage Boost too high.

  • Load fluctuations or high temp.




Remedy:

  • Check cabling and motor for shorts.

  • Check for mechanical jams.

  • Adjust Accel/Decel or V/f settings.
OH
Overheat — ASD ambient temp excessive.
Cause:

  • ASD operating at elevated temperature.

  • Cooling fan obstructed or inoperative.

  • Internal thermistor disconnected.




Remedy:

  • Clean vents and check fans.

  • Reduce ambient temperature.
OJ
User-set run-time counter exceeded.
Cause:

  • Run-timer limit reached.




Remedy:

  • Type Reset required; select Clear run timer.
OLI
ASD overload.
Cause:

  • Carrier frequency too high.

  • Excessive load.

  • Accel time too short.

  • DC damping rate too high.

  • Motor starting into spinning load.




Remedy:

  • Reduce carrier frequency.

  • Increase Accel time.

  • Check load conditions.
OLM
Motor overload.
Cause:

  • V/f parameter improperly set.

  • Motor locked or running low speed continuously.

  • Motor improperly matched to load.




Remedy:

  • Adjust V/f parameters.

  • Check for motor locking/jams.
OLST
Overload soft Stall active.
Cause:

  • Soft Stall Selection adjustment required (F017).




Remedy:

  • Adjust parameter F017.
OP
DC bus voltage exceeds specifications.
Cause:

  • Starting into spinning motor after momentary power loss.

  • High input voltage or spikes (install inductive filter).

  • Decel time too short.

  • Regenerative load (Over-voltage stall turned off).




Remedy:

  • Increase Decel time.

  • Install input reactor/filter.

  • Enable Ridethrough (F302) or Over-voltage stall.
OT
Over-torque.
Cause:

  • Torque requirement exceeds F616/F617 for time > F618.

  • ASD not matched to application.

  • Load obstructed.




Remedy:

  • Check load for obstructions.

  • Adjust torque parameters F616, F617, F618.
POFF
Under-voltage at 5, 15, or 24 VDC supply.
Cause:

  • Defective Control board.

  • Excessive load on power supply.

  • Low input voltage.




Remedy:

  • Check input voltage.

  • Replace Control board if defective.
POT
Pre-over-torque.
Cause:

  • Torque requirement exceeds F616 or F617.

  • Load obstructed.




Remedy:

  • Clear load obstruction.

  • Adjust F616/F617 if necessary.
PTC
Optional thermal sensor threshold exceeded.
Cause:

  • User-set thermal threshold (F646) exceeded.




Remedy:

  • Check temperature or adjust F646.
UC
Under-current.
Cause:

  • Current below level defined at F611.




Remedy:

  • Disable detection at F610 or adjust F611.
E-10
Over-voltage at analog input.
Cause:

  • Mis-wire at the ASD input terminals.




Remedy:

  • Check input terminal wiring.
E-12
Open circuit at shaft-mounted encoder.
Cause:

  • Encoder signal missing.




Remedy:

  • Check encoder connection.
E-13
Over-speed error.
Cause:

  • Motor speed > commanded speed.

  • Improper encoder connection or setup.

  • Defective encoder.




Remedy:

  • Check encoder setup and hardware.
E-18
Loss of signal at analog input.
Cause:

  • V/I input missing or low.

  • Over-current at P24.




Remedy:

  • Check analog signal source.
E-19
CPU communication error.
Cause:

  • Internal CPU communication failure.




Remedy:

  • Service call required.
E-20
Speed/torque/direction signal error.
Cause:

  • Control signal transfer error.




Remedy:

  • Service call required.
E-21
Stack overflow error.
Cause:

  • Internal processing error.




Remedy:

  • Service call required.
E-22
Improper input voltage at discrete input.
Cause:

  • Input activation voltage out of specification.




Remedy:

  • Check discrete input voltage levels.
E-23
Expansion card option 1 hardware error.
Cause:

  • Option card 1 failure.




Remedy:

  • Service call required.
E-24
Expansion card option 2 hardware error.
Cause:

  • Option card 2 failure.




Remedy:

  • Service call required.
E-26
CPU fault.
Cause:

  • Internal CPU fault.




Remedy:

  • Service call required.
EEP1
EEPROM write error.
Cause:

  • Data storage failure.




Remedy:

  • Service call required.
EEP2 / EEP3
EEPROM read error.
Cause:

  • Data retrieval failure during initialization.




Remedy:

  • Service call required.
EF1
Software-detected earth fault.
Cause:

  • Mis-wired ground.

  • Loose ground connection.

  • ASD setup improperly.




Remedy:

  • Verify ground wiring.
EF2
Hardware-detected earth fault.
Cause:

  • Mis-wired ground or loose connection.




Remedy:

  • Verify ground wiring.
Emergency Off
Emergency Off command (Trip).
Cause:

  • Stop-Reset pressed twice.

  • EOFF command received.




Remedy:

  • ASD reset required.

  • Check stopping method at F603.
EPHI
Input phase loss (R, S, or T).
Cause:

  • Mis-wired input phase.

  • Loose input phase connection.




Remedy:

  • Check input power wiring.
EPHO
Output phase loss (U, V, or W).
Cause:

  • Mis-wired output phase.

  • Loose output phase connection.




Remedy:

  • Check motor wiring.
ERR2 / ERR3 / ERR4 / ERR5 / ERR6
Internal ROM/RAM/CPU/Comm/Gate Array errors.
Cause:

  • Internal hardware or communication timeouts.

  • Improper setup or connections (ERR5/ERR8).




Remedy:

  • Service call required (for most hardware errors).

  • Check cables and setup (for Comm/Net errors).
OC1 / OC1P
Over-current during acceleration.
Cause:

  • V/f setting needs adjustment.

  • Restart from momentary power outage.

  • Starting into rotating motor.

  • Phase-to-phase short.

  • Accel time too short.

  • Voltage Boost too high.

  • Motor jammed or brake engaged.




Remedy:

  • Adjust V/f or Accel settings.

  • Clear jams/brakes.

  • Check for shorts.
OC2 / OC2P
Over-current during deceleration.
Cause:

  • Phase-to-phase short.

  • Decel time too short.

  • Motor/machine jammed.




Remedy:

  • Increase Decel time.

  • Check for shorts/jams.
OC3 / OC3P
Over-current during run.
Cause:

  • ASD/Motor load not matched.

  • Load fluctuations.

  • Elevated temperature.




Remedy:

  • Verify drive sizing.

  • Check cooling.
OCA1 / OCA2 / OCA3
Over-current at U/V/W phase IGBT.
Cause:

  • Low impedance at the specific phase (U, V, or W).




Remedy:

  • Check IGBT and motor phase impedance.
OCL
Output short circuit at U-V-W.
Cause:

  • Phase-to-phase short.

  • Starting into rotating motor.

  • Short Circuit Detection adjustment required (F613).




Remedy:

  • Check wiring for shorts.

  • Adjust F613.
OH
Over temperature error.
Cause:

  • Cooling fan inoperative.

  • Ventilation obstructed.




Remedy:

  • Check fans and clear vents.
OH2
Over temperature at PTC1/PTC2.
Cause:

  • Over-temperature detected by option board.

  • See F637 and F638.




Remedy:

  • Check external device temperature.
OL1
ASD overload error.
Cause:

  • Accel time too short.

  • DC Injection current too high.

  • V/f setting needs adjustment.




Remedy:

  • Adjust Accel or V/f settings.
OL2
Motor overload error.
Cause:

  • Motor locked or continuous low speed.

  • Load exceeds motor ability.




Remedy:

  • Check for jams.

  • Review sizing.
OP1 / OP2 / OP3
Over-voltage (Accel/Decel/Run).
Cause:

  • Motor running during restart.

  • Decel time too short.

  • Stall protection disabled.

  • Input voltage out of spec.




Remedy:

  • Increase Decel time.

  • Check input voltage.

  • Install input reactance if needed.
OT
Over-torque error.
Cause:

  • Torque exceeds F616/F617 settings.

  • Load obstructed.




Remedy:

  • Clear obstruction.

  • Adjust torque parameters.
SOUT
Permanent magnet motor pull out trip.
Cause:

  • Motor sync loss.




Remedy:

  • Service call required.
UC
Low-Current error.
Cause:

  • Improper low-current detection level setting.




Remedy:

  • Adjust detection level.
UP1
Main power under-voltage.
Cause:

  • 3-phase input voltage low.

  • Defective control board.

  • Excessive load on power supply.

  • Under-Voltage/Ridethrough settings require adjustment.




Remedy:

  • Check input power.

  • Adjust Ridethrough settings.