Maintenance And Inspection - Hitachi SJ100 Series Instruction Manual

Maintenance and Inspection

Monthly and Yearly Inspection Chart
Item Inspected
Overall Ambient
environment
Major devices
Power supply
voltage
Main Ground
circuit Insulation
Mounting
Components
Housing
Terminal block Secure
Smoothing
capacitor
Relay(s)
Resistors
Cooling fan
Control Overall
circuit
Capacitor
Display LEDs
Note 1: The life of a capacitor is affected by the ambient temperature. See the Capacitor Life Curve on
the next page.
Note 2: The inverter must be cleaned periodically. If dust accumulates on the fan and heat sink, it can
cause overheating of the inverter.
Inspection
Cycle
Check for...
Month Year
✔
Extreme
temperatures
& humidity
✔
Abnormal
vibration,
noise
✔
Voltage
tolerance
✔
Adequate
resistance
✔
No loose
screws
✔
Overheating
✔
Dirt, dust
✔
connections
✔
Leaking,
swelling
✔
Chattering
✔
Cracks or
discoloring
✔
Noise
✔
Dust
✔
No odor,
discoloring,
corrosion
✔
No leaks or
deformation
✔
Legibility
SJ100 Inverter
Inspection
Method
Thermometer, Ambient temperature
hygrometer between -10 to 40°C,
non-condensing
Visual and aural Stable environment for
electronic controls
Digital volt meter, 200V class:
measure between 200 to 240V 50/60 Hz
inverter terminals 400V class:
L1, L2, L3 380 to 460V 50/60 Hz
Digital volt meter, 5 Meg. Ohms or greater
GND to terminals
Torque wrench M3: 0.5 – 0.6 Nm
M4: 0.98 – 1.3 Nm
M5: 1.5 – 2.0 Nm
Thermal trip events No trip events
Visual Vacuum dust and dirt
Visual No abnormalities
Visual No abnormalities
Aural Single click when
switching On or Off
Visual Use Ohm meter to
check braking resistors
Power down, Rotation must be
manually rotate smooth
Visual Vacuum to clean
Visual No abnormalities
Visual Undistorted appearance
Visual All LED segments work
6–9
Criteria