YASKAWA GA50U Series

13 Troubleshooting
YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation 91
Code Name Causes Possible Solutions
CoF Current Offset Fault
The drive starts operation while
the induced voltage stays in the
motor (during coasting to a stop or
after fast deceleration).
• Make a sequence that does not restart
operation when induced voltage stays in
the motor.
• Set b3-01 = 1 [Speed Search at Start
Selection = Enabled].
• Use Speed Search from Fmax or Fref
[H1-xx = 61, 62] to do a speed search
through one of the external terminals.
Note:
When controlling the PM motor,
External Speed Search commands 1 and
2 operate the same.
A drive hardware problem
occurred.
Replace the drive.
CP1
Comparator 1 Limit
Error
The monitor value set in H2-20
[Comparator 1 Monitor Selection]
was in the range of H2-21
[Comparator 1 Lower Limit] and
H2-22 [Comparator 1 Upper
Limit].
Examine the monitor value and remove the
cause of the fault.
CP2
Comparator 2 Limit
Error
The monitor value set in H2-26
[Comparator 2 Monitor Selection]
was outside the range of H2-27
[Comparator 2 Lower Limit] and
H2-28 [Comparator 2 Upper
Limit].
Examine the monitor value and remove the
cause of the fault.
CPF00,
CPF01,
CPF02,
CPF03,
CPF08,
CPF11 -
CPF14,
CPF16 -
CPF24,
CPF38
Control Circuit Error
A drive hardware problem
occurred.
• Re-energize the drive.
• If the fault stays, replace the control
board or the drive. For information about
replacing the control board, contact
Yaskawa or your nearest sales
representative.
CPF06
EEPROM Memory
Data Error
The drive power supply was de-
energized while a communication
option card entered a parameter
Write command.
Set A1-03 = 2220, 3330 [Initialize
Parameters = 2-Wire Initialization, 3-Wire
Initialization] and initialize the drive.
An EEPROM peripheral circuit
error occurred.
• Re-energize the drive.
• If the fault stays, replace the control
board or the drive. For information about
replacing the control board, contact
Yaskawa or your nearest sales
representative.
dCE1 Communication Error1
A drive hardware problem
occurred temporarily due to noise.
• Remove the cause of the noise.
• If the fault stays, replace the control
board or the drive.
dCE2 Communication Error2
A drive hardware problem
occurred temporarily due to noise.
• Remove the cause of the noise.
• If the fault stays, replace the control
board or the drive.
dEv Speed Deviation
The load is too heavy. Decrease the load.
Acceleration and deceleration
times are set too short.
Increase the values set in C1-01 to C1-08
[Acceleration/Deceleration Time].