Delta VFD-EL-W Series - Page 188

Chapter 6 Fault Code Information and MaintenanceVFD-EL-W
183
Main circuit electromagnetic contactor and relay
Items to Check
Methods and Criterion
Maintenance Period
Daily
Half Year
One Year
Check for any vibration sounds.
Auditory inspection.

Check that the contact works
correctly.
Visual inspection

Main circuit printed circuit board and connector
Items to Check
Methods and Criterion
Maintenance Period
Daily
Half Year
One Year
Check for any loose screws and
connectors.
Tighten the screws.

Check for any peculiar odors or color
changes.
Visual inspection and smell

Check for any cracking, damage,
deformation or corrosion.
Visual inspection

Check for any leakage of liquid or
deformation in the capacitors.
Visual inspection

Cooling system cooling fan
Items to Check
Methods and Criterion
Maintenance Period
Daily
Half Year
One Year
Check for any abnormal sounds or
vibrations.
Visual, auditory inspection and turn
the fan by hand (turn off the power
first) to check for smooth rotation.

Check for any loose screws.
Tighten the screws.

Check for any color change due to
overheating.
Change fan.

Cooling system ventilation channel
Items to Check
Methods and Criterion
Maintenance Period
Daily
Half Year
One Year
Check for any obstruction around the
heat sink, air intake or air outlet.
Visual inspection

NOTE: Use chemically neutral cloth to clean and use a dust cleaner to remove dust when necessary.