Troubleshooting
2
2.4 Fault
YASKAWA TOEPYAIGA5001A GA500 DRIVE MAINTENANCE & TROUBLESHOOTING 43
Code Name Causes Possible Solutions
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
dv7 Polarity Judge Timeout
There is a disconnection in the motor coil winding. Measure the motor line-to-line resistance and replace the motor if a
coil is disconnected.
The screws on the drive output terminals are loose. Tighten the terminal screws to the correct tightening torque.
Note:
• The drive detects this error if it cannot detect polarity in a pre-set length of time.
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
dWF1
EEPROM Memory DWEZ Data
Error
There is an error in the EEPROM peripheral circuit. • 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.
There is a problem with the EEPROM data. Set A1-03 = 2220, 3330 [Initialize Parameters = 2-Wire
Initialization, 3-Wire Initialization] to initialize the drive, then
upload the DriveWorksEZ project to the drive again.
Note:
• The drive detects this error if there is an error in the DriveWorksEZ program that was saved to EEPROM.
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
dWF2 DriveWorksEZ Fault 2
There was a fault in the DriveWorksEZ program. Examine the DriveWorksEZ program and remove the cause of the
fault. This is not a drive fault.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
dWF3 DriveWorksEZ Fault 3
There was a fault in the DriveWorksEZ program. Examine the DriveWorksEZ program and remove the cause of the
fault. This is not a drive fault.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
dWFL DriveWorksEZ Fault
There was a fault in the DriveWorksEZ program. Examine the DriveWorksEZ program and remove the cause of the
fault. This is not a drive fault.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
E5
MECHATROLINK Watchdog Timer
Err
The drive detected a watchdog circuit exception while
it received data from the controller.
Examine the MECHATROLINK cable connection. If this error
occurs frequently, examine the wiring and decrease the effects of
electrical interference as specified by these manuals:
• MECHATROLINK-II Installation Guide (MECHATROLINK
Members Association, manual number MMATDEP011)
• MECHATROLINK-III Installation Manual (MECHATROLINK
Members Association, publication number MMATDEP018)
Note:
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the stop method set in F6-25 [MECHATROLINK Watchdog Error Sel].
Code Name Causes Possible Solutions
EF0 Option Card External Fault
The communication option received an external fault
from the controller.
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input from the controller.
A programming error occurred on the controller side. Examine the operation of the controller program.
Note:
• The drive detects this fault if the alarm function on the external device side is operating.
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the stop method set in F6-03 [Comm External Fault (EF0) Select].
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