Delta VFD-E Series, Руководство пользователя

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Appendix F Suggestions and Fault Corrections for Standard AC Motor Drives 
F-4
Transformer and reactor of main circuit
Check Items Methods and Criterion
Maintenance Period
Daily
Half
Year
One
Year
If there is any abnormal vibration or
peculiar smell Visual, aural inspection
and smell
○
Magnetic contactor and relay of main circuit
Check Items Methods and Criterion
Maintenance Period
Daily
Half
Year
One
Year
If there are any loose screws
Visual and aural
inspection
○
If the contact works correctly Visual inspection
○
Printed circuit board and connector of main circuit
Check Items Methods and Criterion
Maintenance Period
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 and smell
inspection
○
If there is any crack, damage,
deformation or corrosion
Visual inspection
○
If there is any liquid is leaked or
deformation in capacity
Visual inspection
○
Cooling fan of cooling system
Check Items Methods and Criterion
Maintenance Period
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 color change due to
overheat
Change fan
○