5.10 Troubleshooting without Fault DisplayThis section describes troubleshooting problems that do not trip an alarm or fault.The following symptoms indicate that the drive is not set correctly for proper performance with the motor. Refer to MotorPerformance Fine-Tuning on page 200 for guidance on troubleshooting.• Motor hunting and oscillation• Poor motor torque• Poor speed precision• Poor motor torque and speed response• Motor noiseu Common ProblemsCommon Problems PageCannot Change Parameter Settings 237Motor Does Not Rotate Properly after Pressing the AUTO Button orafter Entering External Run CommandMotor Does Not Rotate 238Motor Rotates in the Opposite Direction from the Run Command 239Motor Rotates in One Direction Only 239Motor is Too Hot 239oPE02 Error Occurs When Lowering the Motor Rated Current Setting 240Motor Stalls During Acceleration or With Large Loads 240Drive Frequency Reference Differs from the Controller Frequency Reference Command 241Excessive Motor Oscillation and Erratic Rotation 241Deceleration Takes Longer Than Expected 241Noise From Drive or Motor Cables When the Drive is Powered On 241Ground Fault Circuit Interrupter (GFCI) Trips During Run 241Connected Machinery Vibrates When Motor Rotates Unexpected Noise from Connected Machinery 242Oscillation or Hunting 242PI Output Fault 242Motor Rotates After the Drive Output is Shut Off (Motor Rotates During DC Injection Braking) 242Output Frequency is not as High as Frequency Reference 243Sound from Motor 243Unstable Motor Speed when Using PM 243Motor Does Not Restart after Power Loss 243u Cannot Change Parameter SettingsCause Possible SolutionsThe drive is running the motor(i.e., the Run command 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 to parametersettings. • Set the Access Level to allow parameters to be edited (A1-01 = 2).The operator is not in the Parameter Setup Mode(the screen will display “PAr”).• See what mode the operator is currently set for.• Parameters cannot be edited when in the Setup Mode (“STUP”). Switch modes so that “PAr”appears on the screen. Refer to The Drive, Programming, and Clock Adjustment Modes onpage 112.A multi-function contact input terminal is set to allowor restrict parameter editing(H1-01 through H1-07 = 1B).• When the terminal is open, parameters cannot be edited.• Turn on the multi-function contact input set to 1B.5.10 Troubleshooting without Fault DisplayYASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual 2375 Troubleshooting
