Chapter 8 Maintenance and Inspections|VFD-B Series

„ DC capacity of main circuit

Check Items

Methods and Criterion

If there is any leak of liquid,

color change, crack or

deformation

Measure static capacity when

required

Visual inspection

Static capacity ≥ initial value X 0.85

Maintenance

Period

Daily

Half

Year

One

Year

{

{

„ 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

{

Visual inspection or measure with

If there is any disconnection

multimeter after removing wiring

between +1/+2 ~ -

{

Resistor value should be within ± 10%

„ Transformer and reactor of main circuit

Check Items

Methods and Criterion

If there is any abnormal vibration

or peculiar smell

Visual, aural inspection and smell

Maintenance

Period

Daily

Half

Year

One

Year

{

„ Magnetic contactor and relay of main circuit

Check Items

Methods and Criterion

If there are any loose screws

Check to see if contacts work

correctly

Visual and aural inspection

Visual inspection

Maintenance

Period

Daily

Half

Year

One

Year

{

{

8-4

Revision July 2008, BE16, SW V4.08 & V5.00