Terminal wires on the output side
of the drive are loose.
Apply the tightening torque specified in this manual to fasten the terminals. Refer
to Wire Size and Torque Specifications on page 70.
No signal displays from the gate
driver board.
Replace the drive. Contact Yaskawa for assistance.
Motor impedance or motor phases
are uneven.
• Measure the line-to-line resistance for each motor phase. Ensure all values are
the same.
• Replace the motor. Contact Yaskawa for assistance.
nSE
Node Setup Error
A terminal assigned to the node setup function closed during Run.
Cause Possible Solution
The node setup terminal closed
during Run.
• Check whether a Run command was accidentally entered via the terminals or
from a comm. option unit.
• Turn off the Run command when using the node setup function.
A Run command was issued while
the node setup function was active.
oC
Overcurrent
Drive sensors have detected an output current greater than the specified
overcurrent level.
Cause Possible Solution
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.
• Remove the short circuit and power the drive back up.
•
Check the resistance between the motor cables and the ground terminal .
• Replace damaged cables.
The load is too heavy.
• Measure the current flowing into the motor.
• Replace the drive with a larger capacity unit if the current value exceeds the
rated current of the drive.
• Determine if there is sudden fluctuation in the current level.
• 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.
Calculate the torque needed during acceleration relative to the load inertia and the
specified acceleration time.
If the right amount of torque cannot be set, make the following changes:
• Increase the acceleration time (C1-01, -03, -05, -07)
• Increase the S-curve characteristics (C2-01 through C2-04)
• Increase the capacity of the drive.
The drive is attempting to operate a
specialized motor or a motor larger
than the maximum size allowed.
• Check the motor capacity.
• Ensure that the rated capacity of the drive is greater than or equal to the capacity
rating found on the motor nameplate.
Magnetic contactor (MC) on the
output side of the drive has turned
on or off.
Set up the operation sequence so that the MC is not tripped while the drive is
outputting current.
5.2 Fault Detection
136
YASKAWA ELECTRIC TOEP C710606 47A YASKAWA AC Drive – V1000 Quick Start Guide
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