Fault Detection; Fault Detection; Fault Displays, Causes And Possible Solutions - YASKAWA J1000 Technical Manual

6.4

Fault Detection

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Fault Displays, Causes and Possible Solutions

LED Operator Display
Cause
Faulty communications wiring, or a short
circuit exists.
A communications data error occurred due to
noise.
LED Operator Display
Cause
Due to residual induction current in the motor
when the drive attempted to start the motor,
the drive tried to adjust the current offset value
beyond the allowable range.
LED Operator Display
or CPF00 or CPF01
Cause
Hardware is damaged.
LED Operator Display
Cause
Control circuit is damaged.
Control circuit terminals have shorted out (+V,
AC).
Control terminal input current has exceeded
allowable levels.
LED Operator Display
Cause
Control circuit is damaged.
The power supply was switched off when
parameters were written (e.g., using an option
unit).
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
Table 6.7 Detailed Fault Displays, Causes and Possible Solutions
MEMOBUS/Modbus Communication Error
CE
No data was received for longer than 2 seconds.
• Check for faulty wiring.
• Correct the wiring.
• Check for loose wiring and short circuits. Repair as needed.
• Check the various options available to minimize the effects of noise.
• Counteract noise in control circuit, main circuit, and ground wiring.
• Use Yaskawa-recommended cables, or another type of shielded line. Ground the shield on the controller
side or on the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise and use surge suppressors
if required.
• Separate all wiring for communications devices from drive input power lines. Install a noise filter to
the input side of the drive input power.
Current Offset Fault
CoF
The current sensor is damaged or there was residual current in the motor (e.g., during sudden acceleration
or when coasting) when the drive attempted to start the motor.
Create a motor restart sequence that allows enough time for residual induction voltage to dissipate.
CPF11 – RAM Fault
CPF12 – Problem with the ROM (FLASH memory)
CPF14 – CPU error (CPU operates incorrectly due to noise, etc.)
CPF17 – A timing error occurred during an internal process
CPF18 – CPU error (CPU operates incorrectly due to noise, etc.)
Replace the drive.
A/D Conversion Error
CPF02
An A/D conversion error occurred.
Cycle power to the drive. If the problem continues, replace the drive.
• Check for wiring errors along the control circuit terminals.
• Correct the wiring.
Check the resistance of the speed potentiometer and related wiring.
• Check the input current.
• Reduce the current input to control circuit terminal (+V) to 20 mA.
EEPROM Data Error
CPF06
There is an error in the data saved to EEPROM.
Cycle power to the drive. If the problem continues, replace the drive.
• Cycle power to the drive and check operation again.
• Initialize the drive using A1-03.
• If the problem continues, replace the drive.
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6.4 Fault Detection

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