Delta Electronics VFD-G manual Fault Code Information, Common Problems and Solutions

Chapter 6 Fault Code Information and Maintenance

6.1 Fault Code Information

The AC motor 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 motor drive digital keypad display. The four most recent faults can be read from the digital keypad or communication.

NOTE

Wait 5 seconds after a fault has been cleared before performing reset via keypad or input terminal.

6.1.1 Common Problems and Solutions

Fault	Fault Descriptions		Corrective Actions
Name
		1.	Check whether the motors horsepower
	The AC drive detects an		corresponds to the AC drive output power.
		2.	Check the wiring connections between the AC
	abnormal increase in current.
			drive and motor for possible short circuits.
		3.	Increase the Acceleration time.
		4.	Check for possible excessive loading conditions
	IGBT protection		at the motor.
	(Insulated Gate Bipolar	5.	If there are any abnormal conditions when
	Transistor)		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 that the	2.	Check for possible voltage transients.
	DC bus voltage has	3.	Bus over-voltage may also be caused by motor
	exceeded its maximum		regeneration. Either increase the decel time or
	allowable value.		add an optional braking resistor.
		4.	Check whether the required braking power is
			within the specified limits.

Revision July 2008, EG03, SW V1.06 6-1