Hitachi L2002 User Manual
L200
2
Inverter
T
roub
leshooting
and Maintenance
6–9
Maintenance and Inspection
Monthly and Yearly Inspection Chart
Note 1:
The life of a capacitor is affected by the ambient temperature. See
.
Note 2:
The inverter must be cleaned periodically. If dust accumulates on the fan and
heat sink, it can cause overheating of the inverter.
heat sink, it can cause overheating of the inverter.
Item Inspected
Check for...
Inspection Cycle
Inspection
Method
Criteria
Month
Year
Overall
Ambient
environment
environment
Extreme
temperatures
& humidity
temperatures
& humidity
✔
Thermometer,
hygrometer
hygrometer
Ambient temperature
between -10 to 40°C,
non-condensing
between -10 to 40°C,
non-condensing
Major devices
Abnormal
noise & vib.
noise & vib.
✔
Visual and aural
Stable environment for
electronic controls
electronic controls
Power supply
voltage
voltage
Voltage
tolerance
tolerance
✔
Digital volt meter,
measure between
inverter terminals
[L1], [L2], [L3]
measure between
inverter terminals
[L1], [L2], [L3]
200V class:
200 to 240V 50/60 Hz
400V class:
380 to 460V 50/60 Hz
200 to 240V 50/60 Hz
400V class:
380 to 460V 50/60 Hz
Main
circuit
Ground
Insulation
Insulation
Adequate
resistance
resistance
✔
Digital volt meter,
GND to terminals
GND to terminals
5 Meg. Ohms or greater
Mounting
No loose
screws
screws
✔
Torque wrench
M3: 0.5 – 0.6 Nm
M4: 0.98 – 1.3 Nm
M5: 1.5 – 2.0 Nm
M4: 0.98 – 1.3 Nm
M5: 1.5 – 2.0 Nm
Components
Overheating
✔
Thermal trip events No trip events
Housing
Dirt, dust
✔
Visual
Vacuum dust and dirt
Terminal block Secure
connections
✔
Visual
No abnormalities
Smoothing
capacitor
capacitor
Leaking,
swelling
swelling
✔
Visual
No abnormalities
Relay(s)
Chattering
✔
Aural
Single click when
switching ON or OFF
switching ON or OFF
Resistors
Cracks or
discoloring
discoloring
✔
Visual
Check Ohms of
optional braking res.
optional braking res.
Cooling fan
Noise
✔
Power down,
manually rotate
manually rotate
Rotation must be
smooth
smooth
Dust
✔
Visual
Vacuum to clean
Control
circuit
Overall
No odor,
discoloring,
corrosion
discoloring,
corrosion
✔
Visual
No abnormalities
Capacitor
No leaks or
deformation
deformation
✔
Visual
Undistorted appearance
Display LEDs
Legibility
✔
Visual
All LED segments work