YASKAWA J1000 Technical Manual page 136

An external device has tripped an alarm
function.
Wiring is incorrect.
Incorrect setting of multi-function contact
inputs.
LED Operator Display
Cause
-
LED Operator Display
Cause
The output cable is disconnected.
The motor winding is damaged.
The output terminal is loose.
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.
LED 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.
The acceleration or deceleration times are too
short.
The drive is attempting to operate a specialized
motor or a motor larger than the maximum size
allowed.
Magnetic contactor (MC) on the output side of
the drive has turned on or off.
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
Remove the cause of the external fault and reset the fault.
• 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.
• Check if the unused terminals set for H1-oo = 20 to 2F (External Fault).
• Change the terminal settings.
EEPROM Write Error
Err
Data does not match the EEPROM being written to.
•
Press the
• Correct the parameter settings.
• Cycle power to the drive.
Output Phase Loss
LF
Phase loss on the output side of the drive.
• Check for wiring errors and ensure the output cable is connected properly.
• 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.
Torque Specifications on page
Check the drive and motor capacities.
Replace the drive.
The drive being used cannot operate a single phase 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 power the drive back up.
• 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 unit if the current value exceeds the rated current of the drive.
• 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.
Calculate the torque needed during acceleration relative to the load inertia and the specified acceleration
time.
If the right amount of torque cannot be set, make the following changes:
• Increase the acceleration time (C1-01, -03)
• Increase the S-curve characteristics (C2-01 through C2-04)
• Increase the capacity of the drive.
• Check the motor capacity.
• Ensure that the rated capacity of the drive is greater than or equal to the capacity rating found on the
motor nameplate.
Set up the operation sequence so that the MC is not tripped while the drive is outputting current.
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Fault Name
Possible Solution
button.
Refer to Diagnosing and Resetting Faults on page
Fault Name
Possible Solution
44.
Fault Name
Possible Solution
6.4 Fault Detection
146.
Refer to Wire Size and
6
135