248 YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)5.10 Detailed Troubleshooting5.10 Detailed TroubleshootingThis section is for troubleshooting problems that do not trip an alarm or fault.◆ Cannot Change Parameter Settings◆ No Text on Digital Operator Display◆ Motor Does Not Rotate Properly After the RUN Buttonis Pressed or After an External Run Command isEntered■ Motor Does Not RotateCause Possible SolutionsThe drive is running. • Stop the drive and switch over to the Programming Mode.• Most parameters cannot be edited during Run.A multi-function contact input terminal isset to allow or restrict parameter editing(H1-01 through H1-10 = 1B).• When the terminal is open, parameters cannot be edited.• Turn on the multi-function contact input set to 1B.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 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.Cause Possible SolutionsThe power is off. Turn the power on.Cause Possible SolutionsThe drive is not in the Drive Mode.• Check if the DRV light on the LED operator is flashing.• Enter the Drive Mode to begin operating the motor. Refer to The Driveand Programming Modes on page 108.STOP
