Cause : Over current comes when the inverter peak current limit (approximately 200% of the rated current) is exceeded. The warning lasts about 1.5 s, then the frequency converter trips and issues an alarm.

• This fault may be caused by shock loading or fast acceleration with high inertia loads.
• If extended mechanical brake control is selected, trip can be reset externally.
• Remove power and check if the motor shaft can be turned.
• Check that the motor size matches the frequency converter.