Troubleshooting Without Fault Display; Troubleshooting Without Fault Display; Common Problems; Cannot Change Parameter Settings - YASKAWA AC Drive-A1000 Technical Manual

6.10 Troubleshooting without Fault Display

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.
Performance Fine-Tuning on page 290
• Motor hunting and oscillation
• Poor motor torque
• Poor speed precision
• Poor motor torque and speed response
• Motor noise
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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
oPE02 Error Occurs When Lowering the Motor Rated Current Setting
Motor Stalls During Acceleration or With Large Loads
Drive Frequency Reference Differs from the Controller Frequency Reference Command
Excessive Motor Oscillation and Erratic Rotation
Deceleration Takes Longer Than Expected with Dynamic Braking Enabled
Noise From Drive or Output Lines When the Drive is Powered On
Ground Fault Circuit Interrupter (GFCI) Trips During Run
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
Buzzing Sound from Motor at 2 kHz
Unstable Motor Speed when Using PM or IPM
Motor Does Not Restart after Power Loss
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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 operator is not in the Parameter Setup Mode (the
screen will display "PAr").
A multi-function contact input terminal is set to allow
or restrict parameter editing (H1-01 through H1-08 =
1B).
336
for guidance on troubleshooting.
Common Problems
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.
• Most parameters cannot be edited during run.
• Set the Access Level to allow parameters to be edited (A1-01 = 2).
• 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.
• When the terminal is open, parameters cannot be edited.
• Turn on the multi-function contact input set to 1B.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Possible Solutions
Refer to The Drive and Programming Modes on page
Refer to Motor
Page
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