LED Display LCD Display Fault Name
cPF14
CPF14
Control Circuit Fault
CPU error (CPU operates incorrectly due to noise, etc.)
Cause Possible Solution
Hardware is damaged Replace the drive.
LED Display LCD Display Fault Name
cPF16
CPF16
Clock Fault
Standard clock error.
Cause Possible Solution
Hardware is damaged Replace the drive.
LED Display LCD Display Fault Name
cPF17
CPF17
Timing Fault
A timing error occurred during an internal process.
Cause Possible Solution
Hardware is damaged Replace the drive.
LED Display LCD Display Fault Name
cPF18
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.
LED Display LCD Display Fault Name
cPF19
CPF19
Control Circuit Fault
CPU error (Manual reset due to noise, etc.)
Cause Possible Solution
Hardware is damaged Replace the drive.
LED Display LCD Display Fault Name
cPF20
or
cPF21
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 Display LCD Display Fault Name
cPF22
CPF22
A/D Conversion Fault
A/D conversion error.
Cause Possible Solution
Control circuit is damaged.
• Cycle power to the drive.
• If the problem continues, replace the drive.
LED Display LCD Display Fault Name
cPF23
CPF23
PWM Feedback Fault
PWM feedback error.
Cause Possible Solution
Hardware is damaged Replace the drive.
LED Display LCD Display Fault Name
cPF24
CPF24
Drive Unit Signal Fault
The drive capacity cannot be detected correctly (drive capacity is checked when the drive is powered up).
6.3 Fault Detection
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
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Troubleshooting
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