Incorrect setting of multi-function
contact inputs.
•
Check if the unused terminals set for H1-oo = 20 to 2F (External Fault).
•
Change the terminal settings.
LED Operator Display Fault Name
Err
EEPROM Write Error
Data does not match the EEPROM being written to.
Cause Possible Solution
-
•
Press the button.
• Correct the parameter settings.
• Cycle power to the drive. Refer
to Diagnosing and Resetting Faults on page
154.
LED Operator Display Fault Name
LF
Output Phase Loss
Phase loss on the output side of the drive.
Cause Possible Solution
The output cable is disconnected.
• Check for wiring errors and ensure the output cable is connected properly.
• 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 and Torque Specifications on page 60.
The motor being used is less than
5% of the drive rated current.
Check the drive and motor capacities.
An output transistor is damaged.
Replace the drive.
A single-phase motor is being used. The drive being used cannot operate a single phase motor.
LED Operator Display Fault Name
oC
Overcurrent
Drive sensors have detected an output current greater than the specified
overcurrent level.
Cause Possible Solution
The motor has been damaged due
to overheating or the motor
insulation is damaged.
• Check the insulation resistance.
• Replace the motor.
One of the motor cables has
shorted
out or there is a grounding problem.
•
Check the motor cables.
• Remove the short circuit and power the drive back up.
•
Check the resistance between the motor cables and the ground terminal
.
• Replace damaged cables.
5.4 Fault Detection
140
YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
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