Cause Possible Solution
Control circuit is damaged. Cycle power to the drive. If the problem persists, replace the drive.
LED Operator Display Fault Name
CPF11 RAM Fault
Cause Possible Solution
Hardware is damaged. Replace the drive.
LED Operator Display Fault Name
CPF12
FLASH Memory Fault
Problem with the ROM (FLASH memory).
Cause Possible Solution
Hardware is damaged. Replace the drive.
LED Operator Display Fault Name
CPF14
Control Circuit Fault
CPU error (CPU operates incorrectly due to noise, etc.)
Cause Possible Solution
Hardware is damaged. Replace the drive.
LED Operator Display Fault Name
CPF17
Timing Fault
A timing error occurred during an internal process.
Cause Possible Solution
Hardware is damaged. Replace the drive.
LED Operator Display Fault Name
CPF18
Control Circuit Fault
CPU error (CPU operates incorrectly due to noise, etc.)
Cause Possible Solution
Hardware is damaged. Replace the drive.
LED Operator Display Fault Name
or CPF20 or
CPF21
One of the following faults occurred: RAM fault, FLASH memory error, watchdog
circuit exception, clock error
• RAM fault.
• FLASH memory error (ROM error).
• Watchdog circuit exception (self-diagnostic error).
• Clock error.
Cause Possible Solution
Hardware is damaged. Replace the drive.
LED Operator Display Fault Name
CPF22
A/D Conversion Fault
A/D conversion error.
Cause Possible Solution
Control circuit is damaged.
• Cycle power to the drive. Refer to Diagnosing and Resetting Faults on page
141.
• If the problem continues, replace the drive.
LED Operator Display Fault Name
CPF23
PWM Feedback Fault
PWM feedback error.
5.4 Fault Detection
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
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Troubleshooting
2/6/2008-14:44