6.8 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 Run commandis 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 to parametersettings. • Set the Access Level to allow parameters to be edited (A1-01 = 2).The operator is not in the Parameter Setup Mode (theLED screen will display “PAr”).• See what mode the LED parameter is current set for.• Parameters cannot be edited when in the Setup Mode (“STUP”). Switch modes 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 to A1-05, then drivesettings cannot be changed.• Reset the password.If you cannot remember the password:• Display parameter A1-04. Press the STOP button while pressing at 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 Button or after Entering ExternalRun Commandn Motor Does Not RotateCause Possible SolutionsThe drive is not in the DriveMode.• Check if the DRV light on the LED operator is lit.• Enter the Drive Mode to begin operating the motor. Refer to The Drive and Programming Modes on page 62.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 be on, 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 andhas not yet been reset. Reset the Fast-Stop command.Settings are incorrect for thesource that provides the runcommand.Check parameter b1-02 (Run Command Selection).Set b1-02 so that it corresponds with the correct run command source.0: LED operator1: Control circuit terminal (default setting)2: MEMOBUS/Modbus communicationsThere is faulty wiring in thecontrol circuit terminals.• Check the wiring for the control terminal.• Correct wiring mistakes.• Check the input terminal status monitor (U1-10).The drive has been set to acceptthe frequency reference from theincorrect source.Check parameter b1-01 (Frequency Reference Selection 1).Set b1-01 to the correct source of the frequency reference.0: LED operator1: Control circuit terminal (default setting)2: MEMOBUS/Modbus communications3: Potentiometer (option)The terminal set to accept themain speed reference is set to theincorrect voltage and/or current.Check DIP switch S1. Next assign the correct input level to terminal A1 (H3-01).Refer to DIP Switch S1 Analog Input Signal Selection on page 49.Selection for the sink/sourcemode is incorrect. Check DIP switch S3. Refer to Sinking/Sourcing Mode Switch on page 47.Frequency reference is too low. • Check the frequency reference monitor (U1-01).• Increase the frequency by changing the maximum output frequency (E1-09).6.8 Troubleshooting without Fault DisplayYASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual 1476 Troubleshootinghttp://nicontrols.com
