YASKAWA Lift Inverter L1000V, Technical Manual

Page: 172 / 282

6.3 Fault Detection
172 YASKAWA EUROPE SIEP YASKAWA AC Drive L1000V Technical Manual
Accel/decel ramp is too short. Increase the acceleration and deceleration times (C1-01 through C1-08).
The load is locked up. Check the machine.
Parameters are not set appropriately. Check the settings of parameters F1-10 and F1-11.
The motor brake is not applied. Ensure the motor brake operates properly with a brake control command from the drive.
During Rescue Operation, either the DC bus voltage
dropped below S4-12
×
(S4-13 - 10%), or 100 ms after
triggering Rescue Operation, the DC bus voltage did not
reach S4-12
×
S4-13 before the motor started.
• Check the DC bus voltage setting for Rescue Operation (S4-12).
• Lower the speed reference set for Rescue Operation (d1-25).
• Check the backup power supply. It may need to be replaced with another UPS if it has become worn and can no longer provide
enough power.
Digital Operator Display Fault Name
EF3
External Fault (input terminal S3)
External fault at multi-function input terminal S3.
EF4
External Fault (input terminal S4)
External fault at multi-function input terminal S4.
EF5
External Fault (input terminal S5)
External fault at multi-function input terminal S5.
EF6
External Fault (input terminal S6)
External fault at multi-function input terminal S6.
EF7
External Fault (input terminal S7)
External fault at multi-function input terminal S7
Cause Possible Solution
An external device has tripped an alarm function. Remove the cause of the external fault and reset the fault.
Wiring is incorrect.
• Ensure the signal lines have been connected properly to the terminals assigned for external fault detection (H1- = 20 to 2F).
• Reconnect the signal line.
Incorrect multi-function contact input setting
• Check for unused terminals set for H1- = 20 to 2F (External Fault).
• Change the terminal settings.
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 187 .
• 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
GF
Ground Fault
• 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.
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. Refer to Wire Size on page 56 .
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.