Revision January 2009 10-1
Chapter 10 Troubleshooting
If a fault is detected on the servo drive or motor a corresponding fault code will be shown on the drive's LED
display. Fault codes can also be transmitted via communication, see P0-01 and P4-00 ~ P4-04 for display on
controller or HMI.
10.1 Fault Messages Table
Servo Drive Fault Messages
Fault Messages
Display Fault Name Fault Description
Overcurrent
Main circuit current is higher than 1.5 multiple of motor’s
instantaneous maximum current value.
Overvoltage Main circuit voltage has exceeded its maximum allowable value.
Undervoltage Main circuit voltage is below its minimum specified value.
Z Pulse shift The corresponding angle of magnetic field of Z phase is error.
Regeneration error Regeneration control operation is in error.
Overload Servo motor and drive is overload.
Overspeed Motor’s control speed exceeds the limit of normal speed.
Abnormal pulse control
command
Input frequency of pulse command exceeds the limit of its
allowable setting value.
Excessive deviation
Position control deviation value exceeds the limit of its allowable
setting value.
Watch dog execution
time out
Watch dog execution time out.
Encoder error Pulse signal is in error.
Adjustment error
Adjusted value exceeds the limit of its allowable setting value
when perform electrical adjustment.
Emergency stop
activated
Emergency stop switch is activated.
Reverse limit switch
error
Reverse limit switch is activated.
Forward limit switch
error
Forward limit switch is activated.
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