YASKAWA U1000 - Troubleshooting Without Fault Display; Common Problems; Cannot Change Parameter Settings

6.10 Troubleshooting without Fault Display
This 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 Motor
Performance Fine-Tuning on page 356 for guidance on troubleshooting.
• Motor hunting and oscillation
• Poor motor torque
• Poor speed precision
• Poor motor torque and speed response
• Motor noise
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Common Problems
Common Problems Page
Cannot Change Parameter Settings 406
Motor Does Not Rotate Properly after Pressing RUN Button or after
Entering External Run Command
Motor Does Not Rotate 407
Motor Rotates in the Opposite Direction from the Run Command 408
Motor Rotates in One Direction Only 408
Motor is Too Hot 408
Drive Does Not Allow Selection of Rotational Auto-Tuning 409
oPE02 Error Occurs When Lowering the Motor Rated Current Setting 409
Motor Stalls During Acceleration or With Large Loads 409
Drive Frequency Reference Differs from the Controller Frequency Reference Command 410
Excessive Motor Oscillation and Erratic Rotation 410
Noise From Drive or Motor Cables When the Drive is Powered On 410
Ground Fault Circuit Interrupter (GFCI) Trips During Run 411
Connected Machinery Vibrates When Motor Rotates
Unexpected Noise from Connected Machinery 411
Oscillation or Hunting 411
PID Output Fault 411
Insufficient Starting Torque 412
Motor Rotates After the Drive Output is Shut Off (Motor Rotates During DC Injection Braking) 412
Output Frequency is not as High as Frequency Reference 412
Buzzing Sound from Motor at 2 kHz 412
Unstable Motor Speed when Using PM 412
Motor Does Not Restart after Power Loss 413
The Safety Controller Does Not Recognize Safe Disable Monitor Output Signals (Terminals DM+ and DM-) 413
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Cannot Change Parameter Settings
Cause Possible Solutions
The 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 parameter
settings.
• 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 and Programming Modes on page 140.
A multi-function contact input terminal is set to allow
or 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 Display
406
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual