Delta Electronics VFD-M - Manual (Page 139)

Chapter 6 Fault Code Information and Maintenance|
6-8 Revision May 2008, ME14, SW V3.04
Terminals and wiring of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If the wiring shows change of
color change or deformation due
to overheat
Visual inspection {
If the insulation of wiring is
damaged or the color has
changed
Visual inspection {
If there is any damage Visual inspection {
DC capacity of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any leakage of liquid,
change of color, cracks or
deformation
Visual inspection {
Measure static capacity when
required
Static capacity
≥
initial value X 0.85 {
Resistor of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any peculiar smell or
insulator cracks due to
overheating
Visual inspection, smell {
If there is any disconnection
Visual inspection or measure with
multimeter after removing wiring
between B1 ~ B2
Resistor value should be within
±
10%
{