Yaskawa D1000 Series Power Regenerative Converter User Manual
Page 113
5.3 Fault Detection
YASKAWA ELECTRIC TOEP C710656 07C YASKAWA Power Regenerative Converter - D1000 Instruction Manual
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Digital Operator
Display
Fault Name
Details
FUA
AC Fuse Blowout
The power supply fuse is open.
Cause
Possible Solution
The power supply fuse is open.
• A transistor inside the converter was destroyed.
• The input wiring or drive output has ground faulted or short circuited.
Contact your Yaskawa representative or the nearest Yaskawa sales office.
Digital Operator
Display
Fault Name
Details
FUd
DC Fuse Blowout
The DC converter output fuse is open.
Cause
Possible Solution
The main transistor failed.
Replace the converter.
The DC circuit fuse is open.
The drive failed.
Replace the drive.
For information on drive replacement, consult with your Yaskawa representative or the nearest
Yaskawa sales office.
Digital Operator
Display
Fault Name
Details
GF
Ground Fault
A current that exceeded the Ground Short Detection Level was detected at the power supply side
of the converter.
Cause
Possible Solution
A damaged cable is creating a short circuit.
• Check the cable.
• Remove the short circuit and reapply power to the converter
• Check the resistance between the cable and the ground terminal
.
• Replace the cable.
Excessive leakage current at the drive output
Reduce the amount of stray capacitance.
Hardware problem
If the problem continues, replace the control board or the entire converter. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
The wiring of the power supply voltage
detection circuits (
) and
the wiring of the main circuit terminals (R/L1,
S/L2, and T/L3) is not correct.
Correct the wiring.
Digital Operator
Display
Fault Name
Details
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.
Stop the converter when using the node setup function.
A Run command was issued while the node
setup function was active.
Digital Operator
Display
Fault Name
Details
oC
Overcurrent
Converter sensors detected an output current greater than the specified overcurrent level.
Cause
Possible Solution
A momentary power loss occurred.
Investigate and correct the cause and reset the fault.
Refer to
Diagnosing and Resetting Faults on page 131
for details.
One of the cables has shorted out or there is a
grounding problem.
• Check the motor cables.
• Remove the short circuit and reapply power to the converter.
• 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 converter.
• Replace the converter with a larger capacity converter if the current value exceeds the rated
current.
• 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 converter.
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