Maintenance And Inspection - Hitachi L100 Series Instruction Manual

Maintenance and Inspection

Monthly and Yearly Inspection Chart
Item Inspected
Ambient
environment
Major devices
Overall
Power supply
voltage
Ground
Insulation
Mounting
Components
Housing
Terminal block Secure
Main
circuit
Smoothing
capacitor
Relay(s)
Resistors
Cooling fan
Overall
Control
circuit
Capacitor
Display LEDs
Note 1: The life of a capacitor is affected by the ambient temperature. See
Life Curve" on 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
noise & vib.
✔
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
6–11.
Inspection
Method
Thermometer,
hygrometer
Visual and aural
Digital volt meter,
measure between
inverter terminals
[L1], [L2], [L3]
✔
Digital volt meter,
GND to terminals
✔
Torque wrench
✔
Thermal trip
events
✔
Visual
✔
Visual
Visual
✔
Aural
✔
Visual
Power down,
manually rotate
Visual
✔
Visual
Visual
Visual
6–9
L100 Inverter
Criteria
Ambient temperature
between -10 to 40°C,
non-condensing
Stable environment for
electronic controls
200V class:
200 to 240V 50/60 Hz
400V class:
380 to 460V 50/60 Hz
5 Meg. Ohms or greater
M3: 0.5 – 0.6 Nm
M4: 0.98 – 1.3 Nm
M5: 1.5 – 2.0 Nm
No trip events
Vacuum dust and dirt
No abnormalities
No abnormalities
Single click when
switching ON or OFF
Use Ohm meter to
check braking resistors
Rotation must be
smooth
Vacuum to clean
No abnormalities
Undistorted appearance
All LED segments work
"Capacitor