YASKAWA GA700 Technical Manual page 277

Code Name
Note:
• Detected if it is detected that pulses in the opposite direction of the speed reference exceeds the value set in F1-19 [Deviation 4
Detection Selection].
• Perform Fault Reset to clear the fault.
Code Name
dv7 Polarity Judge Timeout
Note:
• Detected if polarity cannot be detected within a prescribed amount of time.
• Perform Fault Reset to clear the fault.
Code Name
dWF1 EEPROM Memory DWEZ
Data Error
Note:
• Detected if there is an error in the DriveWorksEZ program saved to EEPROM.
• Perform Fault Reset to clear the fault.
Code Name
dWF2 DriveWorksEZ Fault 2
Note:
Perform Fault Reset to clear the fault.
Code Name
dWF3 DriveWorksEZ Fault 3
Note:
Perform Fault Reset to clear the fault.
Code Name
dWFL DriveWorksEZ Fault
Note:
Perform Fault Reset to clear the fault.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Cause
Noise interference along the encoder
cable
The encoder cable is improperly wired
or disconnected.
The PG option card or the encoder on
the motor side is damaged.
Cause
Disconnection in the motor coil
winding.
The output terminal screws of the drive
are loose.
Cause
EEPROM peripheral circuit error
Problem with EEPROM data
Cause
The DriveWorksEZ program output a
fault.
Cause
The DriveWorksEZ program output a
fault.
Cause
The DriveWorksEZ program output a
fault.
Possible Solution
Properly ground the shielded wire of the encoder
cable.
Check for any wiring errors or disconnected wires
in the encoder cable, and fix any problems.
Replace the PG option card or the encoder if the
problem continues even after all counter-measures
have been taken and the drive re-energized.
Possible Solution
Measure the motor line-to-line resistance and
replace the motor if a coil is disconnected.
Properly tighten the terminals according to the
specified tightening torque.
Possible Solution
• Restart the drive and check if the fault still
remains.
• Replace either the control board or the entire
drive if the fault continues. For instructions on
replacing the control board, contact Yaskawa or
your nearest sales representative.
Reinitialize the drive by setting A1-03 = 2220,
3330 [Initialize Parameters = 2-Wire initialization,
3-Wire initialization], and download the
DriveWorksEZ project to the drive again.
Possible Solution
Check the DriveWorksEZ program and remove the
cause of the fault. This is not a drive fault.
Possible Solution
Check the DriveWorksEZ program and remove the
cause of the fault. This is not a drive fault.
Possible Solution
Check the DriveWorksEZ program and remove the
cause of the fault. This is not a drive fault.
6.4 Fault
6
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