
Digital Operator Display
Fault Name
Due to residual induction current in the motor
when the drive attempted to start the motor,
the drive attempted to adjust the current offset
value beyond the allowable range.
• Create a motor restart sequence that allows enough time for the residual induction voltage to dissipate.
• Enable Speed Search at start (b3-01 = 1). Use the multi-function terminals to execute External Speed
Search 1 and 2 (H1-
oo
= 61 or 62).
Note:
When using a PM motor, both External Speed Search 1 and 2 perform the same operation.
Digital Operator Display
Fault Name
CPF02
A/D Conversion Error
An A/D conversion error occurred.
Cause
Possible Solution
Control circuit is damaged.
Cycle power to the drive. If the problem continues, replace the drive.
Control circuit terminals have shorted out (+V,
AC).
• Check for wiring errors along the control circuit terminals.
• Correct the wiring.
Check the resistance of the speed potentiometer and related wiring.
Control terminal input current has exceeded
allowable levels.
• Check the input current.
• Reduce the current input to control circuit terminal (+V) to 20 mA.
Digital Operator Display
Fault Name
CPF03
PWM Data Error
There is a problem with the PWM data.
Cause
Possible Solution
Drive hardware is damaged.
Replace the drive.
Digital Operator Display
Fault Name
CPF06
EEPROM Data Error
There is an error in the data saved to EEPROM.
Cause
Possible Solution
Control circuit is damaged.
Cycle power to the drive. If the problem continues, replace the drive.
The power supply was switched off when
parameters were written (e.g., using a
communications option card).
• Cycle power to the drive and check operation again.
• Initialize the drive using A1-03.
• If the problem persists after initializing the drive, replace the drive.
Digital Operator Display
Fault Name
CPF07
Terminal Board Communications Error
A communication error occurred at the terminal board.
Cause
Possible Solution
There is a fault connection between the
terminal board and control board.
Turn the power off and reconnect the control circuit terminals.
Digital Operator Display
Fault Name
CPF08
EEPROM Serial Communication Fault
EEPROM communications are not functioning properly.
Cause
Possible Solution
Terminal board or control board is not
connected properly.
Turn the power off and check the control terminal connections.
Digital Operator Display
Fault Name
CPF11
RAM Fault
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital Operator Display
Fault Name
CPF12
FLASH Memory Fault
Problem with the ROM (FLASH memory).
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
6.4 Fault Detection
268
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual