YASKAWA FSDrive-MV1000 Series - Troubleshooting without Fault Display

5.11 Troubleshooting without Fault Display
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions 183
Troubleshooting
5
5.11 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 140 in this manual or to the FSDrive-MV1000 Parameter Guide (TOEP
C710687 03) for guidance on troubleshooting.
• Motor hunting and oscillation
• Poor motor torque
• Poor speed precision
• Poor motor torque and speed response
• Electrical interference from the motor
u Common Problems
u Cannot Change Parameter Settings
Common Problems
Reference
Page
Cannot Change Parameter Settings 183
Motor Does Not Rotate Properly after Pressing RUN Button or
after Entering External Run Command
Motor Does Not Rotate 184
Motor Rotates in the Opposite Direction from the Run Command 185
Motor Rotates in One Direction Only 185
Motor is Too Hot 185
Drive Does Not Allow Selection of Rotational Auto-Tuning 185
Motor Stalls During Acceleration or With Large Loads/Acceleration Time is Too Long 186
Drive Frequency Reference Differs from the Controller Frequency Reference Command 186
Excessive Motor Oscillation and Erratic Rotation 187
Load Falls When Brake is Applied (Hoist-Type Applications) 187
Electrical Interference from Drive or Motor Cables When the Drive is Powered On 187
Connected Machinery Vibrates When Motor Rotates
Unexpected Interference from Connected Machinery 187
Oscillation or Hunting 187
PID Output Fault 187
Insufficient Starting Torque 188
Motor Rotates After the Drive Output is Shut Off (Motor Rotates During DC Injection Braking) 188
Output Frequency is not as High as Frequency Reference 188
Motor Does Not Restart after Power Loss 188
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 digital operator is not in the Parameter Setup Mode
(the screen should display “PAr”).
Determine the mode in which the digital operator is currently set.
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 113
for details.
A contact input terminal is set to allow parameter editing
(H1-02 through H1-16 = 1B).
When the terminal is open, parameters cannot be edited.
Turn on the contact input terminal set to 1B and then set the parameter.
The wrong password was entered.
If the password entered to A1-04 does not match the password saved to A1-05, then
drive settings cannot be changed.
Reset the password.
• If you cannot remember the password:
• Scroll to A1-04. Press and simultaneously. Parameter A1-05 will
appear.
• Set a new password to parameter A1-05.