Delta Electronics VFD-M - Manual (Page 138)

Chapter 6 Fault Code Information and Maintenance|
Revision May 2008, ME14, SW V3.04 6-7
Keypad
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
Is the display clear for reading? Visual inspection {
Any missing characters? Visual inspection {
Mechanical parts
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any abnormal sound
or vibration
Visual and aural inspection {
If there are any loose screws Tighten the screws {
If any part is deformed or
damaged
Visual inspection {
If there is any color change by
overheating
Visual inspection {
If there is any dust or dirt Visual inspection {
Main circuit
Maintenance
Period
Check Items Methods and Criterion
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 changed 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 {