Troubleshooting Without Fault Display; Troubleshooting Without Fault Display; List Of Key Phenomena; Cannot Change Parameter Settings - YASKAWA FSDrive-MV1000 Instructions Manual

5.11 Troubleshooting without Fault Display

5.11 Troubleshooting without Fault Display

When the drive or motor goes wrong even though the fault or error code is not displayed in the digital operator, refer to
this section to take appropriate measures.
When the symptoms below occurred which may result from the control performance, refer to
Tuning on page 110 in this manual, or to the FSDrive-MV1000 Parameter Guide.
• Motor hunting and oscillation
• Poor motor torque
• Poor speed precision
• Poor motor torque and speed response
• Motor noise

◆ List of Key Phenomena

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)
Noise From Drive or Output Lines 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
◆ 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 will display "PAr").
A sequence input terminal is set to allow parameter
editing (H1-01 through H1-13 = 1B).
The wrong password was entered.
152
Content of Phenomenon
Motor Does Not Rotate
Motor Rotates in the Opposite Direction from the Run
Command
Motor Rotates in One Direction Only
Unexpected Noise from Connected Machinery
Oscillation or Hunting
⇒Stop the drive and switch over to the Programming Mode.
Note: Most parameters cannot be edited during run.
Set the Access Level to allow parameters to be edited (A1-01 = 2).
See what mode the digital 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
on page 83.
When the terminal is open, parameters cannot be edited.
⇒Turn on the sequence 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.
Note: If you cannot remember the password:
Scroll to A1-04. Press the
Parameter A1-05 will appear.
Set a new password to parameter A1-05.
Motor Performance Fine-
Possible Solutions
The Drive and Programming Modes
button and press at the same time.
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions
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