YASKAWA GA50U Series

13 Troubleshooting
92 YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation
Code Name Causes Possible Solutions
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.
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.
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.
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.
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.
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.
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)
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.
EF1
External Fault
(Terminal S1)
MFDI terminal S1 caused an
external fault through an external
device.
1. Find the device that caused the external
fault and remove the cause.
2. Clear the external fault input in the
MFDI.