YASKAWA GA700 Technical Manual page 340

6.4 Faults
Code Name
CPF25 Terminal Board not
Connected
Note:
Do a Fault Reset to clear the fault.
Code Name
dEv Speed Deviation
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
dv1 Z Pulse Fault
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
dv2 Z Pulse Noise Fault
Detection
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
dv3 Inversion Detection
340
Causes
The terminal board is not correctly
connected to the drive.
Causes
The load is too heavy.
Acceleration and deceleration times are
set too short.
The dEv detection level settings are
incorrect.
The load is locked up.
The holding brake is stopping the motor. Release the holding brake.
Causes
The encoder option card or the encoder
on the motor side is damaged.
The encoder cable is disconnected or
wired incorrectly.
Causes
Noise interference along the encoder
cable.
The encoder cable is disconnected or
wired incorrectly.
The PG option card or the encoder on
the motor side is damaged.
Causes
E5-11 [Encoder Z-Pulse Offset] is set
incorrectly.
There is a new encoder or the motor
rotation direction changed.
An external force on the load side
rotated the motor.
Noise interference along the encoder
cable.
The encoder cable is disconnected or
incorrectly wired.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Possible Solutions
1. De-energize the drive.
2. Correctly connect the terminal board to the
drive.
3. Re-energize the drive.
Possible Solutions
Decrease the load.
Increase the values set in C1-01 to C1-08
[Acceleration/Deceleration Time].
Adjust F1-10 [Speed Deviation Detection Level]
and F1-11 [Speed Deviation Detect DelayTime].
Examine the machine.
Possible Solutions
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.
Possible Solutions
Isolate the encoder cable from the drive output line
or a different source of electrical interference.
Repair wiring errors and connect disconnected
wires. Correctly ground the shielded wire of the
encoder cable.
Repair the wiring and re-energize the drive, then
replace the PG option card or the encoder if the
problem continues.
Possible Solutions
Correctly set the value for Δθ to E5-11 as specified
by the values on the motor nameplate.
Do Z Pulse Offset Tuning.
• 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.
Correctly ground the shielded wire of the encoder
cable.
Examine for wiring errors or disconnected wires in
the encoder cable, and repair problems.