Troubleshooting Without Fault Display; Troubleshooting Without Fault Display; Common Problems; Cannot Change Parameter Settings - YASKAWA FSDrive-MV1000 Series Instructions For Use Manual

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.
Motor Performance Fine-Tuning on page 140
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

Cannot Change Parameter Settings

Motor Does Not Rotate Properly after Pressing RUN Button or
after Entering External Run Command
Motor is Too Hot
Drive Does Not Allow Selection of Rotational Auto-Tuning
Motor Stalls During Acceleration or With Large Loads/Acceleration Time is Too Long
Drive Frequency Reference Differs from the Controller Frequency Reference Command
Excessive Motor Oscillation and Erratic Rotation
Load Falls When Brake is Applied (Hoist-Type Applications)
Electrical Interference from Drive or Motor Cables When the Drive is Powered On
Connected Machinery Vibrates When Motor Rotates
PID Output Fault
Insufficient Starting Torque
Motor Rotates After the Drive Output is Shut Off (Motor Rotates During DC Injection Braking)
Output Frequency is not as High as Frequency Reference
Motor Does Not Restart after Power Loss
u Cannot Change Parameter Settings
Cause
The drive is running the motor (i.e., the Run command is
present).
The Access Level is set to restrict access to parameter
settings.
The digital operator is not in the Parameter Setup Mode
(the screen should display "PAr").
A contact input terminal is set to allow parameter editing
(H1-02 through H1-16 = 1B).
The wrong password was entered.
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions

5.11 Troubleshooting without Fault Display

in this manual or to the FSDrive-MV1000 Parameter Guide (TOEP

Common Problems

Motor Does Not Rotate
Motor Rotates in the Opposite Direction from the Run Command
Motor Rotates in One Direction Only
Unexpected Interference from Connected Machinery
Oscillation or Hunting
• Stop the drive and switch over to the Programming Mode.
• Most parameters cannot be edited during run.
Set the Access Level to allow parameters to be edited (A1-01 = 2).
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
for details.
When the terminal is open, parameters cannot be edited.
Turn on the contact input terminal set to 1B and then set the parameter.
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
appear.
• Set a new password to parameter A1-05.
Possible Solutions
The Drive and Programming Modes on page 113
and simultaneously. Parameter A1-05 will
Refer to
Reference
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