Delta Electronics VFD-M Fault Code Information and Maintenance, 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 three most recent faults can be read from the digital keypad by viewing Pr.73 to Pr.75.

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 Name	Fault Descriptions		Corrective Actions
		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
			short circuits.
	The AC drive detects an abnormal	3.	Increase the Acceleration time (Pr.10,
	increase in current.		Pr.12).
		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.
		2.	Check for possible voltage transients.
	The AC drive detects that the DC	3.	Bus over-voltage may also be caused
	bus voltage has exceeded its		by motor regeneration. Either increase
	maximum allowable value.		the decel time or add an optional
			brake resistor.
		4.	Check whether the required braking
			power is within the specified limits.

Revision May 2008, ME14, SW V3.04 6-1