7.2 Daily Inspection
7-3
MAINTENANCE AND INSPECTION
7.2 Daily Inspection
Visually inspect the inverter for operation errors from the outside without removing the covers when the inverter is
running or the power is ON. Table 7.2-1 lists daily inspection items.
Table 7.2-1 Daily inspection list
1) Check the ambient temperature,
humidity, vibrations, and
atmosphere (presence of dust,
gas, oil mist, water droplets,
etc.)
2) Have any foreign objects such
as tools or dangerous objects
been left in the surrounding
area?
1) Perform a visual
inspection, and
perform measurement
with the respective
measuring
instruments.
2) Visual inspection
1) Chapter 1 “1.3.1
Operating
environment” must be
satisfied.
2) No tools or dangerous
objects should have
been left in the
surrounding area.
External
appearance,
other
1) Check that the bolts securing the
wires to the main circuit
terminals and control circuit
terminals are not loose (* Carry
out inspection before turning ON
the power.)
2) Are there any abnormalities
such as signs of overheating or
discoloration?
3) Are there any abnormal noises,
abnormal vibrations, or
abnormal odors, etc.?
1) Retighten (* Do so
before turning ON the
power.)
2) Visual inspection
3) Auditory, visual, and
olfactory inspection
1) There should be no
looseness.
If loose, retighten the
screws.
2), 3) There should be no
abnormalities.
Check for abnormal noise or
excessive vibration when the
cooling fans are in operation.
Auditory and visual
inspections
There should be no
abnormalities.
Check for alarm indication.
If any alarm is displayed,
refer to Chapter 6 “6.3. If
an Alarm Code Appears
on the LED Monitor”.
Is the unit performing as expected
(does it satisfy standard
specifications)?
Check the keypad
monitor.
There should be no
abnormalities in the
output speed, current and
voltage and other running
data.
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