6.3 Fault Detection
290 YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Digital Operator Display Fault Name
Err
EEPROM Write Error
Data cannot be written to the EEPROM.
Cause Possible Solution
Noise has corrupted data while writing to the EEPROM.
•Press .
• Correct the parameter setting.
• Cycle power to the drive. Refer to Diagnosing and Resetting Faults on page 314.
• 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.
Hardware problem.
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.
Digital Operator Display Fault Name
FrL
Speed Reference Missing
Parameter d1-18 is set to 3, leveling speed detection is not assigned to a digital input (H1- ≠ 53) and no speed was selected
while an Up or Down command was entered.
Cause Possible Solution
Parameter d1-18 is set to 1, H1- is not set to 53 and
no speed was selected at start.
• 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.
Digital Operator Display Fault Name
GF
Ground Fault
A current short to ground exceeded 50% of rated current on the output side of the drive.
Cause Possible Solution
Motor insulation is damaged.
• Check the insulation resistance of the motor.
• Replace the motor.
A damaged motor cable is creating a short circuit.
• 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.
The leakage current at the drive output is too high.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
The drive started to run during a current offset fault or
while coasting to a stop.
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).
Hardware problem.
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.
Digital Operator Display Fault Name
LF
Output Phase Loss
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
Cause Possible Solution
The output cable is disconnected.
• Check for wiring errors and properly connect the output cable.
• Correct the wiring.
The motor winding is damaged.
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
The output terminal is loose. Apply the tightening torque specified in this manual to fasten the terminals.
The rated current of the motor being used is less than 5%
of the drive rated current.
Check the drive and motor capacities.
An output transistor is damaged.
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.
A single-phase motor is being used. The drive cannot operate a single phase motor.
Digital Operator Display Fault Name
LF2
Output Current Imbalance (detected when L8-29 = 1)
One or more of the phases in the output current is lost.
Cause Possible Solution
Phase loss has occurred on the output side of the drive.
• Check for faulty wiring or poor connections on the output side of the drive.
• Correct the wiring.
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.
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.
Motor impedance or motor phases are uneven.
• Measure the line-to-line resistance for each motor phase. Ensure all values are the same.
• Replace the motor.
SIEP_C710616_38F_5_0.book 290 ページ ２０１５年１１月９日 月曜日 午後３時３６分
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