YASKAWA L1000A Technical Manual page 261

Digital Operator Display
Cause
Parameter d1-18 is set to 1, H1- is not set to 53 and
no speed was selected at start.
Digital Operator Display
Cause
Motor insulation is damaged.
A damaged motor cable is creating a short circuit.
The leakage current at the drive output is too high.
The drive started to run during a current offset fault or
while coasting to a stop.
Hardware problem.
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. Apply the tightening torque specified in this manual to fasten the terminals. .
The output circuit is damaged.
Motor impedance or motor phases are uneven.
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.
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Speed Reference Missing
FrL
Parameter d1-18 is set to 3, leveling speed detection is not assigned to a digital input (H1-
while an Up or Down command was entered.
• Make sure the selected speed selection method matches the elevator controller sequence. Check parameter d1-18 and H1-
settings.
• Make sure the elevator controller is connected properly.
• Make sure the elevator controller selects the speed properly.
Ground Fault
GF
• A current short to ground exceeded 50% of rated current on the output side of the drive.
• Setting L8-09 to 1 enables ground fault detection.
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit and turn the power back on.
• Check the resistance between the cable and the ground terminal
• Replace the cable.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
The value set exceeds the allowable setting range while the drive automatically adjusts the current offset (this happens only when
attempting to restart a PM motor that is coasting to stop).
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
LF
• 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. .
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 (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.
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 are the same.
• Replace the motor.
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 reapply power to the drive.
• 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 drive 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 drive.
6.3 Fault Detection
Fault Name
≠ 53) and no speed was selected
Possible Solution
Fault Name
Possible Solution
.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
.
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