YASKAWA J1000 User Manual page 8

Common Drive Faults
Note: these are basic tips, refer to the technical manual for more information
Ground Fault
Motor insulation is damaged.
• Check the insulation resistance of the motor.
• Replace the motor.
Hardware problem.
• Replace the drive.
Output Power Phase Loss
The output cable is disconnected.
• Check for wiring errors and ensure the output cable is connected properly.
• Correct the wiring.
The motor winding is damaged.
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
The output terminal is loose.
• Apply the tightening torque specified in this manual to fasten the terminals.
An output transistor is damaged.
• Replace the drive.
Over Current
The motor has been damaged due to overheating or the motor insulation is damaged.
• Check the insulation resistance.
• Replace the motor.
One of the motor cables has shorted out or there is a grounding problem.
• Check the motor cables.
• Check the resistance between the motor cables and the ground terminal .
• Replace damaged cables.
The load is too heavy.
• Reduce the load to avoid sudden changes in the current level or switch to a larger drive.
The acceleration or deceleration times are too short.
• Increase the acceleration time
• Increase the deceleration time
Motor Overload
Load is too heavy.
• Reduce the load.
Cycle times are too short during acceleration and deceleration.
• Increase the acceleration and deceleration times (C1-01 through C1-08).
Multiple motors are running off the same drive.
• Disable the Motor Protection function (L1-01 = "0") and install a thermal relay to each motor.
Output current fluctuation due to input phase loss
• Check the power supply for phase loss
Drive Overload
Load is too heavy.
• Reduce the load.
Cycle times are too short during acceleration and deceleration.
• Increase the acceleration and deceleration times (C1-01 through C1-08).
Output current fluctuation due to input phase loss
• Check the power supply for phase loss.
Document Title: Tech Guide ~ Yaskawa J1000/V1000/GA500 Basic User Guide
Document Revision: v1.0.9
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