Delta Electronics VFD-S manual Fault

			Chapter 6 Fault Code InformationVFD-S Series
Fault	Fault Descriptions		Corrective Actions
Name
		1.	Short-circuit at motor output: Check for
			possible poor insulation at the output line.
	Over-current during	2.	Sudden increase in motor loading: Check for
			possible motor stall.
	constant speed operation
		3.	AC motor drive output power is too small:
			Replace the AC motor drive with the next
			higher power model.
		1.	When multi-function input terminals (M1-M5)
	External Fault		are set to external fault, the AC motor drive
			stops output U, V and W.
		2.	Give RESET command after fault has been
			cleared.

Internal EEPROM can not be	Return to the factory.
programmed.
Internal EEPROM can not be	Return to the factory.
programmed.
OH error
OV error
LV error	Return to the factory.
Drive’s internal circuitry
abnormal.
	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.	When the external input terminal (B.B) is
External Base Block.		active, the AC motor drive output will be
		turned off.
(Refer to Pr. 8-06)
	2.	Deactivate the external input terminal (B.B) to
		operate the AC motor drive again.
	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.

Revision August 2008, SE09, SW V2.61 6-3