YASKAWA H6B1A002, Technical Reference

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6.12 Troubleshooting Without Fault Display
520 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
6.12 Troubleshooting Without Fault Display
Note:
Make sure that you use a keypad with FLASH number 1004 or later. Keypads with FLASH numbers 1003 and earlier will not show
characters correctly.
If the bypass or motor operate incorrectly, but the keypad does not show a fault or error code, refer to the items this
section.
•
Motor hunting and oscillation
•
Unsatisfactory motor torque
•
Unsatisfactory speed precision
•
Unsatisfactory motor torque and speed response
•
Motor noise
◆
Typical Problems
Symptom Reference
The Parameter Settings Will Not Change 520
The Motor Does Not Rotate After Entering Run Command 521
The Motor Rotates in the Opposite Direction from the Run Command 522
The Motor Rotates in Only One Direction 522
The Motor Is Too Hot 522
oPE02 Error Occurs When Decreasing the Motor Rated Current Setting 523
The Motor Stalls during Acceleration or Accel/Decel Time Is Too Long 523
The Drive Frequency Reference Is Different than the Controller Frequency Reference Command 524
There Is Too Much Motor Oscillation and the Rotation Is Irregular 524
There Is Audible Noise from the Drive or Motor Cables When the Drive Is Energized 524
The Ground Fault Circuit Interrupter (GFCI) Trips During Run 524
Motor Rotation Causes Unexpected Audible Noise from Connected Machinery 524
Motor Rotation Causes Oscillation or Hunting 525
PID Output Fault 525
The Motor Rotates after the Drive Output Is Shut Off 525
The Output Frequency Is Lower Than the Frequency Reference 525
The Motor Is Making an Audible Noise 526
The Motor Will Not Restart after a Loss of Power 526
◆
The Parameter Settings Will Not Change
Causes Possible Solutions
The drive is operating the motor (the drive is in Drive Mode). Stop the drive and change to Programming Mode.
Parameter A1-01 = 0 [Access Level Selection = Operation Only] . Set A1-01 = 2 [Access Level Selection = Advanced Level] or A1-01 = 3 [Expert Level] .
Parameter H1-xx = 1B [MFDI Function Select = Programming Lockout] . Activate the terminals to which H1-xx = 1B is set, and then change the parameters.