19 Troubleshooting
YASKAWA TOEPC71061737B GA800 Drive Installation & Primary Operation 109
Code Name Causes Possible Solutions
There is a short circuit in the communications cable
or the communications cable is not connected.
• Repair short circuits and connect cables.
• Replace the defective communications cable.
Electrical interference caused a communication data
error.
• Examine the control circuit lines, main circuit lines, and ground
wiring, and decrease the effects of electrical interference.
• Make sure that a magnetic contactor is not the source of the
electrical interference, then use a Surge Protective Device if
necessary.
• Use only the recommended cables or other shielded line. Ground
the shield on the controller side or the drive input power side.
• Separate the communication wiring from drive power lines, and
install a noise filter to the input side of the power supply for
communication.
• Decrease the effects of electrical interference from the controller.
CF Control Fault
Motor parameters are set incorrectly Correctly set the motor parameters and do Auto-Tuning again.
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.
CP1 Comparator 1 Limit Fault
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 Fault
The monitor value set in H2-26 [Comparator 2
Monitor Selection] was not in 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 to
CPF03, CPF07
to CPF08,
CPF11 to
CPF14, CPF16
to CPF24, and
CPF26 to
CPF39
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.
CPF25 Terminal Board not Connected
The terminal board is not correctly connected to the
drive.
1. De-energize the drive.
2. Correctly connect the terminal board to the drive.
3. Re-energize the drive.
dEv Speed Deviation
The load is too heavy. Decrease the load.
dv1 Z Pulse Fault
The encoder option card or the encoder on the motor
side is damaged.
1. Repair wiring errors and connect disconnected wires. Correctly
ground the shielded wire of the encoder cable.
2. Re-energize the drive
3. 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.
dv2 Z Pulse Noise Fault Detection
Noise interference along the encoder cable. Isolate the encoder cable from the drive output line or a different
source of electrical interference.
dv3 Inversion Detection
E5-11 [Encoder Z-Pulse Offset] is set incorrectly. Correctly set the value for Δθ to E5-11 as specified by the values on
the motor nameplate.
dv4 Inversion Prevention Detection
An external force on the load side rotated the motor. • Make sure that the motor is rotating in the correct direction.
• Find and repair problems on the load side that cause the motor to
rotate from the load side.
• Disable detection of this fault for applications that rotate the
motor from the load side in the opposite direction of the speed
reference. The drive will not detect this fault if F1-19 = 0
[Deviation 4 Detection Selection = Disabled].
E5-11 [Encoder Z-Pulse Offset] is set incorrectly. Correctly set the value for Δθ to E5-11 as specified by the values on
the motor nameplate.
There is a new encoder or the motor rotation direction
changed.
Do Z Pulse Offset Tuning.
Noise interference along the encoder cable. Correctly ground the shielded wire of the encoder cable.
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
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