Delta VFD-EL-W Series, User Manual

Page: 170 / 197

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
