Acceleration and deceleration times are settoo short. Increase the acceleration and deceleration times (C1-01 through C1-08).The load is locked up. Check the machine.Parameters are not set appropriately. Check the settings of parameters F1-10 and F1-11.Motor brake engaged. Ensure the motor brake releases properly.LED Operator Display Fault NamedWFL DriveWorksEZ FaultdWAL DriveWorksEZ Program Error OutputCause Possible SolutionFault output by DriveWorksEZ Correct the cause of the fault.LED Operator Display Fault NameE5 MECHATROLINK Watchdog Timer ErrorThe watchdog timed out.Cause Possible SolutionData has not been received from the PLC,triggering the watchdog timer. Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET commandand proceed to phase 3.LED Operator Display Fault NameEF0 Option Card External FaultAn external fault condition is present.Cause Possible SolutionAn external fault was received from the PLCwith other than F6-03 = 3 “alarm only” (thedrive continued to run after external fault).• Remove the cause of the external fault.• Remove the external fault input from the PLC.Problem with the PLC program. Check the PLC program and correct problems.LED Operator Display Fault NameEF1 External Fault (input terminal S1)External fault at multi-function input terminal S1.EF2 External Fault (input terminal S2)External fault at multi-function input terminal S2.EF3 External Fault (input terminal S3)External fault at multi-function input terminal S3.EF4 External Fault (input terminal S4)External fault at multi-function input terminal S4.EF5 External Fault (input terminal S5)External fault at multi-function input terminal S5.EF6 External Fault (input terminal S6)External fault at multi-function input terminal S6.EF7 External Fault (input terminal S7)External fault at multi-function input terminal S7Cause Possible SolutionAn external device has tripped an alarmfunction. Remove the cause of the external fault and reset the fault.Wiring is incorrect.• Ensure the signal lines have been connected properly to the terminals assigned for external faultdetection (H1-oo = 20 to 2F).• Reconnect the signal line.Incorrect setting of multi-function contactinputs.• Check if the unused terminals set for H1-oo = 20 to 2F (External Fault).• Change the terminal settings.LED Operator Display Fault NameErr EEPROM Write ErrorData does not match the EEPROM being written to.Cause Possible Solution-• Press the button.• Correct the parameter settings.• Cycle power to the drive. Refer to Diagnosing and Resetting Faults on page 279.6.4 Fault Detection256 YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
