Delta VFD-M-D series User Manual

Chapter 8 Maintenance and Inspections|VFD-M-D Series
8-4 Revision Jan. 2007, MDE2, SW V1.05
 DC capacity of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any leak of liquid,
color change, crack 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 overheat
Visual inspection, smell

If there is any disconnection
Visual inspection or measure with
multimeter after removing wiring
between P ~ N
Resistor value should be within
±
10%

 Transformer and reactor of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any abnormal vibration
or peculiar smell
Visual, aural inspection and smell

 Magnetic contactor and relay of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there are any loose screws Visual and aural inspection

If the contact works correctly Visual inspection


Delta VFD-M-D series Specifications

General

Brand	Delta
Model	VFD-M-D series
Category	Controller
Language	English