Delta Electronics VFD-G manual Fault Fault Descriptions Corrective Actions Name

		Chapter 6 Fault Code Information and Maintenance
Fault	Fault Descriptions		Corrective Actions
Name
	Over-current during
	deceleration:	1.	Check for possible poor insulation at the output
	1. Short-circuit at motor
			line.
	output.
		2.	Increase the deceleration time.
	2. Deceleration time too
		3.	Replace with the AC drive with one that has a
	short.
			higher output capacity (next HP size).
	3. AC drive output capacity
	is too small.
	Over-current during steady
	state operation:	1.	Check for possible poor insulation at the output
	1. Short-circuit at motor
			line.
	output.
		2.	Check for possible motor stall.
	2. Sudden increase in motor
		3.	Replace with the AC drive with one that has a
	loading.
			higher output capacity (next HP size).
	3. AC drive output capacity
	is too small.
	The external terminal EF-	1.	When external terminal EF-GND is closed, the
			output will be turned off. (Under N.O. E.F.)
	GND goes from OFF to ON.
		2.	Press RESET after fault has been cleared.
	Emergency stop.
	When the multi-function input	Press RESET after fault has been cleared.
	terminals (MI1 to MI4) stop,
	AC drive stops any output.
	Software protection failure	Return to the factory.
	Ground fault:
	The AC drive output is
	abnormal. When the output
	terminal is grounded (short	Ground fault:
	circuit current is 50% more	1.	Check whether the IGBT power module is
	than the AC drive rated
			damaged.
	current), the AC drive power
		2.	Check for possible poor insulation at the output
	module may be damaged.
			line.
	The short circuit protection is
	provided for AC drive
	protection, not user
	protection.
	External Base Block.	1.	When the external input terminal (B.B) is active,
			the AC drive output will be turned off.
	AC drive output is turned off.
		2.	Disable this connection and the AC drive will
	(Refer to Pr. 08-08)
			begin to work again.
	Low Current	1.	Check Load current
		2.	Check Pr.06-08 to Pr.06-10 setting
	Phase Loss	Check Power Source Input

Revision July 2008, EG03, SW V1.06 6-3