Delta Electronics VFD007S23A manual Year

Chapter 8 Maintenance and InspectionsVFD-S Series
	DC capacity of main circuit
			Maintenance
	Check Items	Methods and Criterion		Period
			Daily	Half	One
				Year	Year
	If there is any leakage of liquid,
	change of color, cracks or	Visual inspection
	deformation
	Measure static capacity when	Static capacity ≥ initial value X 0.85
	required
	Resistor of main circuit
			Maintenance
	Check Items	Methods and Criterion		Period
			Daily	Half	One
				Year	Year
	If there is any peculiar smell or
	insulator cracks due to	Visual inspection, smell
	overheating
		Visual inspection or measure with
	If there is any disconnection	multimeter after removing wiring
		between +1/+2 ~ -
		Resistor value should be within ± 10%
	Transformer and reactor of main circuit
			Maintenance
	Check Items	Methods and Criterion		Period
			Daily	Half	One
				Year	Year
	If there is any abnormal vibration	Visual, aural inspection and smell
	or peculiar smell
	Magnetic contactor and relay of main circuit
			Maintenance
	Check Items	Methods and Criterion		Period
			Daily	Half	One
				Year	Year
	If there are any loose screws	Visual and aural inspection. Tighten
		screw if necessary.
	Check to see if contacts work	Visual inspection
	correctly

8-4 Revision August 2006, SE08, SW V2.61