Hitachi WJ-0001S, User Manual

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Maintenance and Inspection
Daily and Yearly Inspection Chart
Item Inspected
Check for…
Inspection
Cycle
Inspection
Method
Criteria
Daily Year
Overall
Ambient
environment Extreme
temperatures &
humidity Thermometer,
hygrometer Ambient temperature
between
–
Humidity 90% or less
non-condensing
Major
devices Abnormal noise
& vib. Visual and aural Stable environment for
electronic controls
Power
supply
voltage Voltage tolerance Digital volt meter,
measure
between inverter
terminals [L1],
[L2], [L3]
200V class: 50/60 Hz
200 to 240V (-15/+10%)
400V class: 50/60 Hz
380 to 460V (-15/+10%)
Main
circuit
Ground
Insulation Adequate
resistance 5 Mohm or greater
Mounting No loose screws Torque wrench M3.5: 1.0Nm M4: 1.4Nm
M5: 3.0 M6: 3.9 to
5.1Nm M8: 5.9 to 8.8Nm
Components Overheating Thermal trip
events No trip events
IGBT Resistance value
Terminal
block Secure
connections Visual No abnormalities
Smoothing
capacitors Leaking, swelling Visual
No abnormalities
Relay(s) Chattering Aural Single click when
switching ON or OFF
Resistors Cracks or
discoloring Visual
Check Ohms of optional
braking res.
Control
circuit
Function
Voltage balance
between phases Measure voltage
between U,V,W Difference must be 2%
or less.
Protection circuit
e.g. Input Ex.trip
signal and check
inverter behavior
and alarm signal.
Functions properly.
Overall No odor,
discoloring,
corrosion Visual No abnormalities
Capacitor Leaking, swelling Visual
Undistorted appearance
Cooling Cooling fan Noise Power down,
manually rotate Rotation must be
smooth
Dust Visual Vacuum to clean
Mounting Visual
Mounted firmly
Heat sink Dust Visual Vacuum to clean
Display LEDs Legibility Visual All LED segments work