Delta Electronics VFD-G manual Ensure that the ambient temperature falls within

Chapter 6 Fault Code Information and Maintenance

Fault	Fault Descriptions		Corrective Actions
Name
		1.	Ensure that the ambient temperature falls within
			the specified temperature range.
	The AC drive temperature	2.	Make sure that the ventilation holes are not
	sensor detects excessive		obstructed.
	heat.	3.	Remove any foreign objects on the heatsinks and
			check for possible dirty heat sink fins.
		4.	Provide enough spacing for adequate ventilation.
	The AC drive detects that the	Check whether the input voltage falls within the rated
	DC bus voltage has fallen
		AC drive’s input voltage.
	below its minimum value.
	The AC drive detects	1.	Check whether the motor is overloaded.
	excessive drive output
	current.	2.	Reduce torque compensation setting as set in
	Note: The AC drive can		Pr.7-02.
	withstand up to 150% of the	3.	Increase the AC drive’s output capacity, i.e.
	rated current for a maximum		bigger horsepower drive.
	of 60 seconds.
		1.	Check for possible motor overload.
		2.	Check electronic thermal overload setting.
	Internal electronic overload	3.	Increase motor capacity, i.e. larger horsepower
			motor.
	trip
		4.	Reduce the current level so that the drive output
			current does not exceed the value set by the
			Motor Rated Current Pr.7-00.
	Motor overload. Check the	1.	Reduce the motor load.
	parameter settings	2.	Adjust the over-torque detection setting to an
	(Pr.6-03 to Pr.6-05)		appropriate setting (Pr.06-03 to Pr.06-05).
		1.	Check the connection between the AC drive and
	Communication Error		computer for loose wires.
		2.	Check if the communication protocol is properly
			set.
	Over-current during
	acceleration:	1.	Check for possible poor insulation at the output
	1. Short-circuit at motor
			line.
	output.
		2.	Decrease the torque boost setting in Pr.7-02.
	2. Torque boost too high.
		3.	Increase the acceleration time.
	3. Acceleration time too
		4.	Replace with the AC drive with one that has a
	short.
			higher output capacity (next HP size).
	4. AC drive output capacity
	is too small.

6-2 Revision July 2008, EG03, SW V1.06