5.8 Troubleshooting without Fault DisplayThis section describes troubleshooting problems that do not trip an alarm or fault.u Cannot Change Parameter SettingsCause Possible SolutionsThe drive is running the motor (i.e., the Runcommand is present). • Stop the drive and switch over to the Programming Mode.• Most parameters cannot be edited during run.The Access Level is set to restrict access toparameter settings. • Set the Access Level to allow parameters to be edited (A1-02 = 2).The operator is not in the Parameter SetupMode (the LED screen will display “PAr”).• See what mode the LED parameter is current set for.• Parameters cannot be edited when in the Setup Mode (“STUP”). Switchmodes so that “PAr” appears on the screen.The wrong password was entered.• If the password entered to A1-04 does not match the password saved toA1-05, then drive settings cannot be changed.• Reset the password.If you cannot remember the password:•Display parameter A1-04. Press the STOP button while pressingat the same time. Parameter A1-05 will appear.• Set a new password to parameter A1-05.Undervoltage was detected. • Check the drive input power voltage by looking at the DC bus voltage(U1-07).• Check all main circuit wiring.u Motor Does Not Rotate Properly after Pressing RUN Buttonor after Entering External Run Commandn Motor Does Not RotateCause Possible SolutionsThe drive is not in the Drive Mode. • Check if the DRV light on the LED operator is lit.• Enter the Drive Mode to begin operating the motor. Refer to The Driveand Programming Modes on page 78.The button was pushed.Stop the drive and check if the correct frequency reference source is selected.If the operator keypad shall be the source, the LO/RE button LED must beon, if the source is REMOTE, it must be off.Take the following step to solve the problem:•Push the button.A Fast-Stop was executed and has not yetbeen reset. Reset the Fast-Stop command.Settings are incorrect for the source thatprovides the run command.Check parameter b1-02 (Run Command Selection).Set b1-02 so that it corresponds with the correct run command source.0: LED/LCD operator1: Control circuit terminal (default setting)2: MEMOBUS/Modbus communications5.8 Troubleshooting without Fault DisplayYASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual 1435 Troubleshooting
