YASKAWA GA700 Series

7.4 Fault
326 YASKAWA SIEPC71061705H GA700 Series Technical Manual
Code Name Causes Possible Solutions
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.
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for these faults.
Code Name Causes Possible Solutions
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].
The dEv detection level settings are incorrect. Adjust F1-10 [Speed Deviation Detection Level] and F1-11
[Speed Deviation Detect DelayTime].
The load is locked up. Examine the machine.
The holding brake is stopping the motor. Release the holding brake.
Note:
• The drive detects this error if the difference between the detected speed and the speed reference is more than the setting of F1-10 for longer than F1-11.
• Do a Fault Reset to clear the fault.
• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in F1-04 [Speed Deviation Detection Select].
Code Name Causes Possible Solutions
dv1 Z Pulse Fault
The encoder option card or the encoder on the
motor side is damaged.
The encoder cable is disconnected or wired
incorrectly.
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.
Note:
• The drive detects this error if it does not detect a Z pulse during one motor rotation.
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
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.
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems. Correctly ground the shielded wire of
the encoder cable.
The drive is operating a motor with 24 or more
poles at zero speed.
• Set F1-46 = 1 [dv2 Detection Method Selection =
MechanicalAngle Detection Method].
• Increase F1-17 [Deviation 2 Detection Selection].
• Increase F1-47 [Deviation 2 Detection Level].
Note:
If you change the setting of F1-47, the sensitivity of detection
for dv2 can decrease.
The PG option or the encoder on the motor side is
damaged.
Repair the wiring and re-energize the drive, then replace the PG
option or the encoder if the problem continues.
Note:
• The drive detects this error if it detects more than one Z pulse per rotation for the number of rotations set in F1-17 [Deviation 2 Detection Selection].
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
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.
There is a new encoder or the motor rotation
direction changed.
Do Z Pulse Offset Tuning.
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.
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.
The setting for F1-05 [Encoder 1 Rotation
Selection] is the opposite of the direction of motor
rotation.
Correctly connect the motor wiring for each phase (U, V, W).
The drive incorrectly detected the motor magnetic
pole position.
When U6-57 [PolePolarityDeterVal] < 819, increase n8-84
[Polarity Detection Current]. Consult the motor manufacturer for
information about maximum setting values.
n8-84 [Polarity Detection Current] is too low. Increase n8-84 from the default. Consult the motor manufacturer
for information about maximum setting values.
Pole Position Detection failed. If you are using an IPM motor, do High Frequency Injection
Auto-Tuning.