Yaskawa J1000 AC drive:

Faults:

When the drive detects a fault:
    The digital operator displays the text indicating a specific fault, and the ALM indicator LED remains lit until the fault is reset.
    The fault cuts off the drive output, and the motor is released and stops.
    If a digital output is programmed as a fault output (H2-01 = E), it turns off when a fault occurs.
When the drive detects a fault, it cannot operate until the fault is reset.

Minor Faults and Alarms:

When the drive detects an alarm or a minor fault:
    The digital operator displays the text indicating a specific alarm or minor fault, and the ALM indicator LED flashes.
    The motor does not stop.
    The multifunction contact output turns off if triggered by a minor fault (H2-01 = 10), but not by an alarm.
An alarm or minor fault is automatically reset when its cause is removed.

Operating Errors:

When parameter settings conflict with each other or do not match hardware settings (such as an option unit), an operating error occurs.
When the drive detects an operating error:
    The digital operator displays the text indicating a specific error.
    The multifunction contact output does not operate.
When the drive detects an operating error, it does not operate the motor until the error is reset. Correct the settings causing the operating error.

Alarm and Error Indicators:

When the drive detects a fault, the ALM indicator LEDs light up without flashing. If the LEDs are flashing, the drive has detected a minor fault or alarm. For example, conditions such as overvoltage or external faults can cause both faults and minor faults, so it is important to pay attention to whether the LEDs are flashing or not.

Fault Indicators:

CE: MEMOBUS/Modbus Communication Error
CoF: Current Offset Error
CPF00 or CPF01: CPF11 – RAM Error, CPF12 – FLASH Memory Error, CPF14 – Control Circuit Error, CPF17 – Timing Error, CPF18 – Control Circuit Error
CPF02: A/D Conversion Error
CPF06: Driver specification mismatch during Terminal Card or Control Card replacement
CPF08: EEPROM Serial Communication Error
CPF22: A/D Conversion Error
CPF23: PWM Feedback Data Error
CPF24: Drive Capacity Signal Error
EF0: Option Unit External Error
EF1 - EF5: External Error (input terminal S1 - S5)
Err: EEPROM Writing Error
oC: Overcurrent
oFA01: Option Connection Disconnected
oH1: Heat Sink Overheating
oL1: Motor Overload
oL2: Drive Overload
oL3: Over Torque Detection 1
oPr: Operator Connection Error
ov: Overvoltage
PF: Input Phase Loss
rH: Dynamic Braking Resistance
Uv1: Undervoltage
Uv3: Soft Charge Circuit Error

Recommended corrective methods for each of these errors are indicated next to the error code. If an error occurs after the drive is successfully started, the display may show a different error code. When a minor fault or alarm occurs, the ALM LED flashes, and the text display shows an alarm code. If the text is illuminated without flashing, a fault has occurred.

CE MEMOBUS/Modbus Communication Error: Data was not received correctly for more than 2 seconds.

Possible Causes:

+ There is a wiring error or short circuit in the communication cabling.
+ A communication data error occurred due to noise.

Possible Solutions:

+ Check the faulty wiring.
+ Correct the wiring.
+ Check for loose wiring and short circuits and repair them as needed.
+ Check various options to minimize the effects of noise.
+ Prevent noise in the control circuit, main circuit, and grounding wiring.
+ Use cables recommended by Yaskawa or another type of shielded line. Ground the shield on the controller side or the drive input power side.
+ Ensure that other equipment such as switches or relays does not cause noise and use surge suppressors if necessary.
+ Separate all wiring for communication devices from the drive input power lines. Install a noise filter on the input side of the drive input power.

LED Operator Display Fault Name:

CoF Current Offset Error: There is a problem with the current detection circuit.

Possible Causes:

+ When the drive automatically sets the current offset, the calculated value exceeded the allowable setting range.

Possible Solutions:

+ Replace the drive.