YASKAWA P1000 Technical Manual page 197

HOA Keypad Display
Motor insulation is damaged
A damaged motor cable is creating a short circuit
Excessive leakage current at the drive output
The drive started to run during a current offset fault
or while coasting to a stop
Hardware problem
HOA Keypad Display
LF
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
HOA Keypad Display
LF2
Cause
Phase loss has occurred on the output side of the
drive
Terminal wires are loose on the output side of the
drive
The output circuit is damaged
Motor impedance or motor phases are uneven
HOA Keypad Display
nSE
Cause
The node setup terminal closed during run
A Run command was issued while the node setup
function was active
HOA Keypad Display
oC
Cause
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit and reapply power to the drive
• Check the resistance between the cable and the ground terminal
• Replace the cable.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
Set b3-01 to 1 to enable Speed Search at Start.
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Output Phase Loss
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
• Check for wiring errors and properly connect the output cable.
• 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.
and Tightening Torque Specifications on page 43
Check the drive and motor capacities.
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
The drive cannot operate a single phase motor.
Output Current Imbalance
One or more of the phases in the output current are 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.
and Tightening Torque Specifications on page 43
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
• Measure the line-to-line resistance for each motor phase. Ensure all values match.
• Replace the motor.
Node Setup Error
A terminal assigned to the node setup function closed during run.
Stop the drive when using the node setup function.
Overcurrent
Drive sensors detected an output current greater than the specified overcurrent level.
6.4 Fault Detection
Fault Name
.
Fault Name
Possible Solution
for details.
Fault Name
Possible Solution
for details.
Fault Name
Possible Solution
Fault Name
Possible Solution
Refer to Wire Gauge
Refer to Wire Gauge
6
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