Delta Electronics VFD-F Series manual Troubleshooting and Fault Information, Fault Descriptions

VFD-F Series

CHAPTER 7 Troubleshooting and Fault Information

The AC drive has a comprehensive fault diagnostic system that includes several different alarms and fault messages. Once a fault is detected, the corresponding protective functions will be activated. The following faults are displayed as shown on the AC drive digital keypad display. The four most recent faults can be read on the digital keypad display.

NOTE: Faults can be cleared by a reset from the keypad or Input Terminal.

Common Problems and Solutions:

Fault	Fault Descriptions		Corrective Actions
Name
		1.	Check whether the motors horsepower
			corresponds to the AC drive output
			power.
		2.	Check the wiring connections between
			the AC drive and motor for possible
	The AC drive detects an		short circuits.
	abnormal increase in	3.	Increase the Acceleration time.
	current.	4.	Check for possible excessive loading
			conditions at the motor.
		5.	If there are any abnormal conditions
			when operating the AC drive after
			short-circuit being removed, it should be
			sent back to manufacturer.
		1.	Check whether the input voltage falls
			within the rated AC drive input voltage.
	The AC drive detects	2.	Check for possible voltage transients.
	that the DC bus voltage	3.	Bus over-voltage may also be caused by
	has exceeded its		motor regeneration. Either increase the
	maximum allowable		decel time or add an optional brake
	value.		resistor.
		4.	Check whether the required brake power
			is within the specified limits.
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