YASKAWA A1000 Series Quick Start Manual page 103

Digital Operator Display
Cause
The output cable is disconnected.
The motor winding is damaged.
The output terminal is loose.
The rated current of the motor being used is
less than 5% of the drive rated current.
An output transistor is damaged.
A single-phase motor is being used.
Digital Operator Display
Cause
Phase loss has occurred on the output side
of the drive.
Terminal wires on the output side of the
drive are loose.
The output circuit is damaged.
Motor impedance or motor phases are
uneven.
Digital Operator Display
Cause
The node setup terminal closed during run.
A run command was issued while the node
setup function was active.
Digital Operator Display
Cause
The motor has been damaged due to
overheating or the motor insulation is
damaged.
One of the motor cables has shorted out or
there is a grounding problem.
The load is too heavy.
The acceleration or deceleration times are
too short.
The drive is attempting to operate a
specialized motor or a motor larger than the
maximum size allowed.
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
Output Phase Loss
LF
• Phase loss on the output side of the drive.
• Phase Loss Detection is enabled when L8-07 is set to 1 or 2.
• Check for wiring errors and ensure the output cable is connected properly.
• Correct the wiring.
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
• Apply the tightening torque specified in this manual to fasten the terminals.
Torque Specifications on page
Check the drive and motor capacities.
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
The drive cannot operate a single phase motor.
Output current imbalance (detected when L8-29 = 1)
LF2
One or more of the phases in the output current is lost.
• Check for faulty wiring or poor connections on the output side of the drive.
• Correct the wiring.
Apply the tightening torque specified in this manual to fasten the terminals.
Torque Specifications on page
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
• Measure the line-to-line resistance for each motor phase. Ensure all values are the same.
• Replace the motor.
Node Setup Error
nSE
A terminal assigned to the node setup function closed during run.
Stop the drive when using the node setup function.
Overcurrent
oC
Drive sensors have detected an output current greater than the specified overcurrent level.
• Check the insulation resistance.
• Replace the motor.
• 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.
• 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.
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.
• 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.
Fault Name
Possible Solution
46.
Fault Name
Possible Solution
46.
Fault Name
Possible Solution
Fault Name
Possible Solution
5 Troubleshooting
Refer to Wire Size and
Refer to Wire Size and
.
5
103