Chapter 6 Fault Code Information and MaintenanceVFD-EL-W
181
6-2 Maintenance and Inspections
Before the check-up, always turn off the AC input power for at least five minutes and remove the cover.
Even if the power has been turned off, a charge may still remain in the filter capacitors with hazardous
voltages before the power is OFF. Make sure the voltage is lower than 25 V
DC
before you perform any
inspections.
Ambient environment
Check the ambient temperature,
humidity, vibration and for any dust,
gas, oil or water drops.
Visual inspection and measurement
with equipment with standard
specifications
Check for any dangerous objects in
the environment.
Check if the voltages of the main
circuit and control circuit are correct.
Measure with multi-meter with
standard specifications.
Check that the display is clear for
reading.
Check for any missing characters in
the display.
Check for any abnormal sounds or
vibrations.
Visual and auditory inspection
Check for any loose screws.
Check for deformed or damaged
parts.
Check for any color change due to
overheating.
Check for any dust or dirt.
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