Yaskawa J1000 Compact Vector Control Drive - Manual (Page 140)

Digital Operator Display Fault Name
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.
Digital Operator Display Fault Name
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, C1-03, C1-05, C1-07)
• 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.
V/f setting is not operating as
expected.
• Check the ratios between the voltage and frequency.
• Set parameter E1-04 through E1-10 appropriately. Set E3-04 through E3-10
when using a second motor.
• Lower the voltage if it is too high relative to the frequency.
5.2 Fault Detection
140 YASKAWA ELECTRIC TOEP C710606 47C YASKAWA AC Drive – V1000 Quick Start Guide