
Digital Operator Display
Fault Name
CPF13
Watchdog Circuit Exception
Self-diagnostics problem.
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital 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.
Digital Operator Display
Fault Name
CPF16
Clock Fault
Standard clock error.
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital Operator Display
Fault Name
CPF17
Timing Fault
A timing error occurred during an internal process.
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital Operator Display
Fault Name
CPF18
Control Circuit Fault
CPU error. Non-Maskable Interrupt (An unusual interrupt was triggered by noise, etc.)
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital Operator Display
Fault Name
CPF19
Control Circuit Fault
CPU error (Manual reset due to noise, etc.)
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital 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.
Digital Operator Display
Fault Name
CPF22
A/D Conversion Fault
A/D conversion error.
Cause
Possible Solution
Control circuit is damaged.
Refer to Diagnosing and Resetting Faults on page 298
.
• If the problem continues, replace the drive.
Digital Operator Display
Fault Name
CPF23
PWM Feedback Fault
PWM feedback error.
6.4 Fault Detection
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
269
6
Troubleshooting