Delta VFD-L-I Series, User Manual

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Chapter 7 Maintenance and Inspections
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VFD-L-I Series
Revision July 2009, SW V1.1 7-5
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Printed circuit board and connector of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there are any loose screws and
connectors Tighten the screws and press the
connectors firmly in place.
{
If there is any peculiar smell and
color change
Visual inspection and smell
{
If there is any crack, damage,
deformation or corrosion
Visual inspection
{
If there is any leaked liquid or
deformation in capacitors
Visual inspection
{
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Cooling fan of cooling system
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any abnormal sound or
vibration
Visual, aural inspection and turn the
fan with hand (turn off the power
before operation) to see if it rotates
smoothly
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If there is any loose screw Tighten the screw
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If there is any change of color due
to overheating
Change fan
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Ventilation channel of cooling system
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any obstruction in the
heat sink, air intake or air outlet
Visual inspection
{