Toshiba VF-AS1 fault codes 2
Phase Failure (EPH0, EPH1):
Cause: A phase failure has occurred in the output or input line of the main circuit.
Solution: Check the main circuit output or input line for phase failure and address any issues.
Control Unit Faults (Err2, Err3, Err4):
Cause: These errors indicate defects in the control RAM, ROM, or CPU.
Solution: Contact your Toshiba distributor for assistance.
Communication Errors (Err5, Err6, Err7):
Cause: These errors can occur due to issues with external control devices, the main gate array, or the output current detector.
Solution: Check the remote control device, cables, and connections. If the issue persists, contact your Toshiba distributor.
Tuning Errors (Etn, Etn1, Etn2, Etn3):
Cause: These errors occur when auto-tuning fails due to incorrect motor capacity, wrong motor type, or improper connection lengths.
Solution: Ensure the correct motor is connected and at a standstill. Perform auto-tuning again, and if the error persists, try manual tuning.
Inverter Type Error (EtyP):
Cause: This error occurs if the circuit board or main circuit/drive circuit board is replaced incorrectly.
Solution: When the board has been replaced, input 6 for tYP.
Analog Input Terminal Overvoltage (E-18):
Cause: Overrated voltage is applied to the analog input.
Solution: Apply voltage within the rated voltage range.
Sequence Error (E-11):
Cause: The signal from the system is not inputted into input terminals, or the input terminal function is not set up correctly.
Solution: Check if the sequence is normal and set up the input terminal function correctly.
Encoder Error (E-12):
Cause: Disconnection of the encoder circuit or incorrect connection of the encoder.
Solution: Check and connect the encoder correctly. Ensure the settings match the encoder's phase-A and phase-B connections.
Speed Error (E-13):
Cause: This error occurs due to an inverter error, encoder error, or over speed by overvoltage limit operation.
Solution: Check the settings related to speed and the encoder connection. If necessary, install a dynamic braking resistor.
Terminal Input Error (E-18):
Cause: There may be a breakdown of a wire for VI/II input signal or a terminal circuit board issue.
Solution: Check the VI/II input signal and ensure the control terminal board is properly installed.
V/f Control Error (E-20):
Cause: This error occurs if the output voltage/output frequency ratio is too high compared to the motor rating or if the motor is in an over-excitation state during deceleration.
Solution: Adjust the base frequency voltage and base frequency according to the motor rating. Check and adjust the parameters for V/f control mode.
CPU Fault (E-21):
Cause: A software error occurs in the control CPU.
Solution: Contact your Toshiba distributor for assistance.
Option Card Errors (E-23, E-24):
Cause: These errors indicate defects in the option cards installed in the inverter.
Solution: Check the connection of the option cards and contact your Toshiba distributor if the issue persists.
Stop Position Retaining Error (E-25):
Cause: A deviation error occurs during stop position retaining control, or the adjustment range is too narrow.
Solution: Check the encoder connection, adjust the proportional P gain, increase the stop position adjustment range, and lower the creeping speed.
Internal Circuit Error (E-26):
Cause: The motor control CPU, drive circuit board, or power device in the inverter is defective.
Solution: Contact your Toshiba distributor for assistance. If the braking function is used, operate the motor in the appropriate mode (Pt=2,3,4,7,8).
Control Power Backup Undervoltage Error (E-29):
Cause: The control voltage between +SU and CC terminals is too low, or control power is not supplied properly.
Solution: Check the voltage between +SU and CC terminals and set the parameter F647 correctly. If necessary, turn the inverter off and then back on to reset it.
Step-out (SOUt):
Cause: This error occurs for PM motors only when the motor shaft is locked, one output phase is open, or an impact load is applied.
Solution: Unlock the motor shaft and check the interconnect cables between the inverter and the motor.
Power Removal Error (PrF):
Cause: There is an error in the power removal circuit.
Solution: Contact your Toshiba distributor for assistance.
Pre-Alarm Display:
Overcurrent Pre-Alarm (C): Similar to OC (Overcurrent) error, check for causes and remedies as per the overcurrent error.
Overvoltage Pre-Alarm (P): Similar to OP (Overvoltage) error, check for causes and remedies as per the overvoltage error.
Overload Pre-Alarm (L): Similar to OL1 and OL2 (Overload) errors, check for causes and remedies as per the overload errors.
Overheat Pre-Alarm (H): Similar to OH (Overheat) error, check for causes and remedies as per the overheat error.
Communication Error (t):
Cause: Various transmission errors can occur when linking up with the inverter system or during inverter-to-inverter communication.
Solution: Refer to the instruction manual for the communications device used and check the master inverter.
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