Delta Electronics VFD-XXXE Over current, Over voltage, Overheating, Overload, Rated current for a

Fault	Fault Descriptions		Corrective Actions
Name
	Low voltage	1.	Check whether the input voltage falls within
	The AC motor drive detects		the AC motor drive rated input voltage range.
	that the DC bus voltage has	2.	Check whether the motor has sudden load.
	fallen below its minimum	3.	Check for correct wiring of input power to R-S-
	value.		T (for 3-phase models) without phase loss.
		1.	Check if motor power corresponds with the AC
			motor drive output power.
		2.	Check the wiring connections to U/T1, V/T2,
			W/T3 for possible short circuits.
		3.	Check the wiring connections between the AC
			motor drive and motor for possible short
			circuits, also to ground.
	Over current	4.	Check for loose contacts between AC motor
			drive and motor.
	Abnormal increase in current.
		5.	Increase the Acceleration Time.
		6.	Check for possible excessive loading
			conditions at the motor.
		7.	If there are still any abnormal conditions when
			operating the AC motor drive after a short-
			circuit is removed and the other points above
			are checked, it should be sent back to
			manufacturer.
		1.	Check if the input voltage falls within the rated
			AC motor drive input voltage range.
	Over voltage	2.	Check for possible voltage transients.
		3.	DC-bus over-voltage may also be caused by
	The DC bus voltage has
			motor regeneration. Either increase the Decel.
	exceeded its maximum
			Time or add an optional brake resistor (and
	allowable value.
			brake unit).
		4.	Check whether the required brake power is
			within the specified limits.
		1.	Ensure that the ambient temperature falls
			within the specified temperature range.
		2.	Make sure that the ventilation holes are not
	Overheating		obstructed.
		3.	Remove any foreign objects from the
	Heat sink temperature too high		heatsinks and check for possible dirty heat
			sink fins.
		4.	Check the fan and clean it.
		5.	Provide enough spacing for adequate
			ventilation.
	Overload
	The AC motor drive detects	1.	Check whether the motor is overloaded.
	excessive drive output current.	2.	Reduce torque compensation setting in
	NOTE: The AC motor drive		Pr.07.02.
	can withstand up to 150% of	3. Take the next higher power AC motor drive
	the rated current for a		model.
	maximum of 60 seconds.
		1.	Check for possible motor overload.
		2.	Check electronic thermal overload setting.
	Overload 1	3.	Use a higher power motor.
	Internal electronic overload trip	4.	Reduce the current level so that the drive
			output current does not exceed the value set by
			the Motor Rated Current Pr.07.00.

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