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YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 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. Refer to
Motor Performance Fine-Tuning on page 344
for guidance on troubleshooting.
• Motor hunting and oscillation
• Poor motor torque
• Poor speed precision
• Poor motor torque and speed response
• Motor noise
◆
Common Problems
◆
Cannot Change Parameter Settings
Common Problems
Page
Cannot Change Parameter Settings
Motor Does Not Rotate Properly after Pressing RUN Button or after Entering
External Run Command
Motor Does Not Rotate
Motor Rotates in the Opposite Direction from the Run Command
Motor Rotates in One Direction Only
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
Load Falls When Brake is Applied (Hoist-Type Applications)
Noise From Drive or Motor Cables When the Drive is Powered On
Earth Leakage Circuit Breaker (ELCB) Trips During Run
Connected Machinery Vibrates When Motor Rotates
Unexpected Noise from Connected Machinery
Oscillation or Hunting
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
The Safety Controller Does Not Recognize Safe Disable Monitor Output Signals (Terminals DM+ and DM-)
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 137
.
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.
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 the
button and press
at the same time. Parameter A1-05 will appear.
• Set a new password to parameter A1-05.
Undervoltage was detected.
• Check the drive input power voltage by looking at the control circuit voltage (U1-07).
• Check all main circuit wiring.
STOP
SIEP_C710636_02B_1_0.book 384 ページ 2015年11月25日 水曜日 午後4時56分