8. Daily Inspection and Periodical Inspection
Inspection
point
Item
Contents
Cycle
Method
Criteria
Standard
replacement
Instruments
daily
periodic
period
Overall
Ambient
Environment
Check ambient temperature,
humidity, dust, corrosive gas, oil mist,
etc.
"
Ambient temperature
: -10deg to 40deg,
no icing
Thermometer
Devices overall Check for abnormal vibrations and
noise.
"
Visual and aural
inspection
Hygrometer
Power supply
voltage
Check voltage between input lines.
"
Measure the
voltage
between input
terminals
No abnormalities.
Within its specification
Tester
Main
circuit
Overall Check installation for looseness.
"
Tighten
Tightening torque
(except for terminal block)
M3: 0.5 - 0.6 N-m
M4: 0.98 - 1.3 N-m
Check for evidence of over heating in
the various components
"
Visual
inspection
Clean
"
Terminal block No damage
"
Visual
inspection
No abnormalities
DC bus
capacitor
Check for leaking liquid
"
Visual No abnormalities
Check for swelling
inspection
Relay Check for stuttering noise when
operation
"
Aural
inspection
No abnormalities
Resistors Check for cracks or changes in color
"
Visual
inspection
No abnormalities
Tester
Cooling fan Check for abnormal vibration and
noise
"
-Rotate
manually while
power off
-Increase
tightening
- Smooth rotation
- No abnormalities
2 - 3 years
Check for dust
"
Visual
inspection
8-1
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