Chapter 6 Fault Code Information and Maintenance
VFD-EL-W
6-7
Main circuit
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check for any loose or missing
screws.
Tighten or replace the screws.
Check for any deformed, cracked, or
damaged machinery or insulation
and for any color change due to
overheating or ageing.
Visual inspection
Check for any dust or dirt. Visual inspection
Main circuit terminals and wiring
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check for wiring color change or
deformation due to overheating.
Visual inspection
Check for wiring insulation damage
or color change.
Visual inspection
Main circuit terminal block
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check for any damage. Visual inspection
Main circuit filter capacity
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check for any leakage of liquid,
color change, cracking or
deformation.
Visual inspection
Check if the safety valve is not
removed or if the valve is obviously
expanded.
Visual inspection
Measure static capacity when
required
Static capacity
initial value X
0.85
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