6.10 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 290 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 329Motor Does Not Rotate Properly after Pressing RUN Buttonor after Entering External Run CommandMotor Does Not Rotate 330Motor Rotates in the Opposite Direction from the RunCommand 331Motor Rotates in One Direction Only 331Motor is Too Hot 331oPE02 Error Occurs When Lowering the Motor Rated Current Setting 332Motor Stalls During Acceleration or With Large Loads 332Drive Frequency Reference Differs from the Controller Frequency Reference Command 333Excessive Motor Oscillation and Erratic Rotation 333Deceleration Takes Longer Than Expected with Dynamic Braking Enabled 333Noise From Drive or Motor Cables When the Drive is Powered On 334Ground Fault Circuit Interrupter (GFCI) Trips During Run 334Connected Machinery Vibrates When Motor Rotates Unexpected Noise from Connected Machinery 334Oscillation or Hunting 334PID Output Fault 335Insufficient Starting Torque 335Motor Rotates After the Drive Output is Shut Off (Motor Rotates During DC Injection Braking) 335Output Frequency is not as High as Frequency Reference 335Buzzing Sound from Motor at 2 kHz 335Motor Does Not Restart after Power Loss 336u 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 114.A multi-function contact input terminal is set to allowor restrict parameter editing(H1-01 through H1-08 = 1B).• When the terminal is open, parameters cannot be edited.• Turn on the multi-function contact input set to 1B.6.10 Troubleshooting without Fault DisplayYASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual 3296 Troubleshooting
