Delta MS300 Series User Manual page 561

Chapter 14 Fault CodesMS300
ID Display on LCD Keypad
4
Action Condition
Action Time
Fault Treatment Parameter
Reset Method
Reset Condition
Record
Cause
Motor burnout or aging insulation
occurred
Short circuit due to broken cable
Larger stray capacitance of the
cable and terminal
Malfunction caused by
interference
Hardware failure
Over-current at constant speed
Over-current during acceleration
Over-current during deceleration
Fault Name
Ground fault
(GFF)
Action and Reset
N/A
N/A
N/A
Manual reset
Reset in five seconds after the fault is cleared
Yes
Check the motor insulation value with megger.
Replace the motor if the insulation is poor.
Troubleshoot the short circuit.
Replace the cable.
If the motor cable length exceeds 100 m, decrease the setting value for the
carrier frequency.
Take remedies to reduce stray capacitance.
Verify the grounding and wiring of the communication circuit. It is recommended
to separate the communication circuit from the main circuit, or wire in 90 degree
for effective anti-interference performance.
Cycle the power after checking the status of motor, cable and cable length. If
GFF still exists, return to the factory for repair.
Refer to the corrective actions for ocn.
Refer to the corrective actions for ocA.
Refer to the corrective actions for ocd.
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Fault Descriptions
When the drive detects grounding short circuit on the
output terminals (U/V/W), the drive closes the gate of
the output immediately, the motor runs freely, and the
display shows a GFF error.
Corrective Actions