Delta Electronics VFD-EL manual Fault

Chapter 6 Fault Code Information and Maintenance

Fault	Fault Descriptions		Corrective Actions
Name
		When (one of) the output terminal(s) is grounded,
		short circuit current is more than 50% of AC motor
		drive rated current, the AC motor drive power
		module may be damaged.
	Ground fault	NOTE: The short circuit protection is provided
		for AC motor drive protection, not for
		protection of the user.
		1.	Check whether the IGBT power module is
			damaged.
		2.	Check for possible poor insulation at the
			output line.
		1.	Check if the motor is suitable for operation by
	Auto accel/decel failure		AC motor drive.
		2.	Check if the regenerative energy is too large.
		3.	Load may have changed suddenly.
		1.	Check the RS485 connection between the AC
			motor drive and RS485 master for loose wires
			and wiring to correct pins.
	Communication Error	2.	Check if the communication protocol, address,
			transmission speed, etc. are properly set.
		3.	Use the correct checksum calculation.
		4.	Please refer to group 9 in the chapter 5 for
			detail information.
	Software protection failure	Return to the factory.
	Analog signal error	Check the wiring of ACI
		1.	Check parameter settings (Pr.10.01) and
			AVI/ACI wiring.
	PID feedback signal error	2.	Check for possible fault between system
			response time and the PID feedback signal
			detection time (Pr.10.08)
	Phase Loss	Check input phase wiring for loose contacts.

6-4 Revision August 2008, 2ELE, V1.02