Chapter 6. Suggestions and Error Corrections for Hybrid Servo DrivesC | VFD-VJ
6-3
Main circuit
Check Items Methods and Criterion
Maintenance
Period
Daily
Half
Year
One
Year
If there are any loose or missing screws Tighten or replace the screw
○
If machine or insulator is deformed, cracked,
damaged or with color change due to
overheating or ageing
Visual inspection
NOTE: Please ignore the
color change of copper
plate
○
If there is any dust or dirt Visual inspection
○
Terminals and wiring of main circuit
Check Items Methods and Criterion
Maintenance
Period
Daily
Half
Year
One
Year
If the terminal or the plate is color change or
deformation due to overheat
Visual inspection
○
If the insulator of wiring is damaged or color
change
Visual inspection
○
If there is any damage Visual inspection
○
DC capacity of main circuit
Check Items Methods and Criterion
Maintenance
Period
Daily
Half
Year
One
Year
If there is any leak of liquid, color change,
crack or deformation
Visual inspection
○
If the safety valve is not removed? If valve is
inflated?
Visual inspection
○
Measure static capacity when required
○
Resistor of main circuit
Check Items Methods and Criterion
Maintenance
Period
Daily
Half
Year
One
Year
If there is any peculiar smell or insulator
cracks due to overheat
Visual inspection, smell
○
If there is any disconnection Visual inspection
○
If connection is damaged?
Measure with multimeter with
standard specification
○
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