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Table 8-2-1 Periodic inspection list
Check part Check item How to inspect Evaluation criteria
Environment
1) Check the ambient air tem-
perature, humidity, vibration,
atmosphere (dust, gas oil mist,
waterdrops)
2) Are foreign matter or dangerous
objects such as tools not left
around the equipment?
1) Measure by visual
inspection and the
meter.
2) With visual in-
spection
1) The specified standard
value must be satisfied.
2) No foreign matter or
dangerous objects left
near the drive?
Voltage Are the voltages in the main circuit
and the control circuit normal?
Measure with the mul-
timeter.
The specified standard value
must be satisfied.
Keypad panel 1) Is the display hard to read?
2) Are the characters complete?
1), 2) Visual
inspection
1),2) The display can be
read and is not abnormal.
Structure such as a
frame or cover
1) Abnormal sound or vibration?
2) Loose bolts (part to be
tightened) ?
3 Deformation or damage?
4) Discoloration by
overheating?
5) Stains and dust?
1) With Visual
inspection and hearing
2) Tighten more
3), 4), 5) With
visual inspection
1), 2), 3), 4), 5)
Not abnormal.
Common 1) Loose and missing bolts?
2) Deformation, cracks, damage,
and discoloration by
overheating and
deterioration in the
equipment and the insulation?
3) Stains and dust?
1) Tighten more
2), 3) Visual
inspection
1), 2), 3):
Not abnormal.
Note: A discolored short-
circuiting bar does not indi-
cate a problem.
Conductor
and wire
1) Discoloration and distortion
of a conductor by overheating?
2) Cracks, crazing, and
discoloration of the wire
sheath?
1), 2) Visual
inspection
1), 2) Not abnormal.
Terminal
block
Not damaged? Visual inspection Not abnormal.
Main circuit
Smoothing
capacitor
1) Electrolyte leakage,
discoloration, crazing, and
swelling of a case?
2) Is a safety valve not out, and
are any valves protruding
excessively?
3) Measure the
capacitance if necessary
1), 2) Visual
inspection
3) Measure using the
capacitance
measuring
instrument (Note)
1), 2) Not abnormal.
3) The capacitance is
initial value x 0.85 or
more.