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-oo
= 20 to 2F).
• Reconnect the signal line.
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
147.
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 55.
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.
5.4 Fault Detection
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
133
5
Troubleshooting
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