Toshiba H7 Drives

Toshiba H7 Drives Fault Codes:

Fault Code and Meaning	Cause and Remedy
CM1 Comm1 Error (Internal)	Cause: Internal communications error. Improperly programmed ASD. Improper communications settings. Improperly connected cables. Remedy: Check programming and cable connections.
CM2 Comm2 Error (External)	Cause: External communications error. Remedy: Check external communication devices and settings.
EMG Emergency Off	Cause: Output signal terminated; brake may be applied. Stop|Reset pressed twice at the EOI. EOFF command received remotely. Remedy: ASD reset required.
MOFF Main Undervoltage	Cause: Undervoltage condition at the 3-phase AC input. Low 3-phase utility voltage.
OC Over Current	Cause: ASD output current greater than F601 setting. Defective IGBT (U, V, or W). ASD output phase-to-phase short. The ASD is starting into a spinning motor. Motor/machine jammed. Mechanical brake engaged while ASD is starting/running. Accel/Decel time too short. Voltage Boost setting too high. Load fluctuations. ASD operating at elevated temperature. Remedy: Check for incorrect motor connection: Disconnect the motor and retry. Check mechanical brake and load.
*OH Overheat	Cause: ASD ambient temperature excessive. ASD operating at elevated temperature. ASD is too close to heat-generating equipment. Cooling fan vent is obstructed. Cooling fan is inoperative. Internal thermistor is disconnected. Remedy: Check mounting and ventilation (see manual pg 18).
OJ Timer	Cause: Run-time counter exceeded. Remedy: Type Reset required; select Clear run timer.
*OLI ASD Overload	Cause: Load requirement in excess of ASD capability. Carrier frequency is too high. An excessive load. Acceleration time is too short. DC damping rate is set too high. Motor starting into a spinning load after power failure. ASD improperly matched to application.
OLM Motor Overload	Cause: Load requirement in excess of motor capability. V/f parameter improperly set. Motor is locked. Continuous operation at low speed. Load is in excess of what the motor can deliver.
*OLR Resistor Overload	Cause: Excessive current at the Dynamic Braking Resistor. Deceleration time is too short. DBR configuration improperly set.
*OP Overvoltage	Cause: DC bus voltage exceeds specifications. ASD attempting to start into a spinning motor after momentary power loss. Incoming utility power is above specified range. Decel time is too short. Voltage spikes at the 3-phase input. DBR resistance value is too high or DBR function turned off. Overvoltage Stall feature is turned off. System is regenerating or load instability. Remedy: Install inductive filter for voltage spikes. Install DBR if required. Disable Ridethrough function (F302).
OT Overtorque	Cause: Torque requirement in excess of F616/F617 settings. ASD is not correctly matched to the application. F616 or F617 setting is too low. Obstructed load.
*POFF Control Undervoltage	Cause: Undervoltage at 5, 15, or 24 VDC supply. Defective Control board. Excessive load on power supply. Low input voltage.
PtSt Reference Point	Cause: Two speed-reference frequency setpoints are too close. Remedy: Increase the difference between the two setpoints.
UC Undercurrent	Cause: Output current below level defined at F611 for time set at F612. Remedy: Check load conditions and F611/F612 settings.
Atn Autotune active	Cause: Autotune function is active. Atn2 indicates retry. Remedy: Wait for completion.
dbOn DC Braking	Cause: DC Injection function being carried out. Remedy: Informational only.
ASD Overload (Trip)	Cause: Acceleration time is too short. DC Injection current is too high. V/f setting needs to be adjusted. Motor running during restart. ASD or motor improperly matched to application.
Autotune Error Configuration Mismatch	Cause: Autotune readings inconsistent with configuration. Non-3-phase motor being used. Incorrect settings at F400, F413, or F414. Motor rating significantly smaller than ASD. Output cabling too small, long, or has interfering EMF. Motor is running during Autotune.
Communication Error Malfunction	Cause: Communication malfunction. Improper or loose connection. Improper system settings.
Control Power Undervoltage Supply Issue	Cause: Undervoltage at 5, 15, or 24 VDC supply. 3-phase input voltage low.
CPU Fault Processor Error	Cause: CPU malfunction. Remedy: Contact Toshiba Sales Representative.
DC Bus Undervoltage Low Voltage	Cause: 3-phase input voltage low. Defective control board. Excessive load on power supply. Remedy: Adjust Undervoltage/Ridethrough settings.
DC Fuse Open Internal Fuse	Cause: Internal DC bus fuse is open. Remedy: Check internal components.
Dynamic Braking Resistor Overcurrent DBR Current	Cause: ASD inability to discharge bus voltage during regeneration. No DBR installed. Deceleration time too short. Improper DBR setup information. Defective IGBT7. 3-phase input voltage above specification.
Dynamic Braking Resistor Overload DBR Overload	Cause: Deceleration time too short. Remedy: DBR setting adjustment required. Overvoltage Stall setting adjustment required.
Earth Fault Ground Fault	Cause: Ground fault at the motor. Ground fault at the output of the ASD. Current leakage to Earth Ground.
EEPROM Data Fault Read Error	Cause: EEPROM read malfunction. Remedy: Internal error; may require service.
EEPROM Fault Write Error	Cause: EEPROM write malfunction. Remedy: Internal error; may require service.
Emergency Off Remote Command	Cause: Emergency Off command received via EOI or remotely. Remedy: Reset ASD.
Encoder Loss Signal Missing	Cause: Encoder signal missing while running during closed-loop operation. Remedy: Check encoder connections.
Flash Memory Fault Internal Error	Cause: Flash memory malfunction.
Gate Array Fault Hardware Error	Cause: Defective Gate Array or Gate Array malfunction.
Input Phase Loss Supply Phase Missing	Cause: 3-phase input to the ASD is low or missing.
Load Drooping Capacity Exceeded	Cause: Load requirement is in excess of the capabilities of the motor.
Load End Short Circuit Wiring Issue	Cause: Improper wiring at the ASD output to the motor.
Low Current Detection Error	Cause: Improper Low Current detection level setting.
Main Board EEPROM Fault Internal Error	Cause: Internal EEPROM malfunction.
Motor Overload (Trip)	Cause: V/f setting needs to be adjusted. Motor is locked. Continuous operation at low speed. Load requirement exceeds ability of the motor. Remedy: Startup frequency setting adjustment required.
No Fault Status	Cause: No active faults.
Option Fault External Device	Cause: Optional device malfunction. Improper system settings (at ASD or optional device). Loose or improper connection.
Output Current Protection Fault Limit Exceeded	Cause: Output current is not within specified limits. Loose or improper ASD-to-motor connection.
Output Phase Loss Missing Phase	Cause: 3-phase output from the ASD is low or missing.
Overcurrent During Acceleration Accel High Current	Cause: V/f setting needs to be adjusted. Restart from a momentary power outage. ASD starting into a rotating motor. ASD/Motor not properly matched. Phase-to-phase short (U, V, or W). Accel time too short. Voltage Boost setting too high. Motor/machine jammed or brake engaged. Current exceeds 320-340% rated FLA during acceleration.
Overcurrent During Deceleration Decel High Current	Cause: Phase-to-phase short (U, V, or W). Deceleration time is too short. Motor/machine jammed or brake engaged. Current exceeds 320-340% rated FLA during deceleration.
Overcurrent During Run Operating High Current	Cause: Load fluctuations. ASD operating at elevated temperature. Current exceeds 320-340% rated FLA during fixed-speed run.
Overheat (Trip)	Cause: Cooling fan inoperative. Ventilation openings are obstructed. Internal thermistor is disconnected.
Over Speed Speed Limit Exceeded	Cause: Result of motor speed greater than commanded speed when using encoder. Improper encoder connection or setup information. Defective encoder.
Overtorque (Trip)	Cause: Torque requirement by load in excess of F616/F617 settings. ASD improperly matched to application. Load is obstructed.
Overvoltage During Acceleration Restart Issue	Cause: Motor running during restart.
Overvoltage During Deceleration Decel Issue	Cause: Deceleration time is too short. DBR value is too high. Stall protection is disabled. 3-phase input voltage out of specification. Remedy: DBR setup required. Input reactance required.
Overvoltage During Run Instability	Cause: Load fluctuations. 3-Phase input voltage out of specification.
PG Type/Connection Error Encoder Error	Cause: ASD configured for encoder but no signal received. Disconnection at the Encoder circuit. Motor stopped and generating torque via torque limit control. ASD is not configured properly.
Phantom Fault System Fault	Cause: In multiple ASD configuration, a faulted ASD signals remaining ASDs to shut down.
Position Deviation Error Position Limit	Cause: Operating in Position Control mode and position exceeds limits of F631.
RAM Fault Memory Error	Cause: Internal RAM malfunction.
ROM Fault Memory Error	Cause: Internal ROM malfunction.
Sink/Source Setting Error Jumper Configuration	Cause: Improperly positioned Sink/Source jumper on control board. Sink/Source configuration of an option device is incorrect.
Torque Proving Fault Adjustment Required	Cause: Lift-First Pulse Count (F743) adjustment required.
Typeform Error Firmware Mismatch	Cause: Firmware loaded into Gate Driver board is inconsistent with device. Gate Driver board has been replaced. Gate Driver board is defective.
U/V/W Phase Short Circuit Output Short	Cause: Low impedance at the U, V, or W lead of the ASD output.