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Chapter 8 Maintenance and Inspections|VFD-S Series
Revision August 2006, SE08, SW V2.61 8-5
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
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
If there is any loose screw Tighten the screw
If there is any change of color due
to overheating
Change fan
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