Maintenance and Inspection

Monthly and Yearly Inspection Chart
Inspection
Cycle
ItemInspected Checkfor…
Month Year
Inspection
Method Criteria
Ambient
environment
Extreme
temperatures
& humidity
9Thermometer,
hygrometer
Ambient temperature
between – 10 to 40qC,
non-condensing
Major devices Abnormal
noise & vib. 9Visual and aural Stable environment for
electronic controls
Overall
Power supply
voltage
Voltage
tolerance 9Digital volt meter,
measure between
inverter terminals
[L1],[L2],[L3]
200V class:
200 to 240V 50/60 Hz
400V class:
380 to 460V 50/60 Hz
Ground
Insulation
Adequate
resistance 9Digital volt meter,
GND to terminals
5 M: or greater
Mounting No loose
screws 9Torque wrench M3: 0.5 – 0.6 Nm
M4: 0.98 – 1.3 Nm
M5: 1.5 – 2.0 Nm
Components Overheating 9Thermal trip
events
No trip events
Housing Dirt, dust 9Visual No abnormalities
Terminal block Secure
connections 9Visual No abnormalities
Smoothing
capacitors
Leaking,
swelling 9Visual No abnormalities
Relay(s)Chattering 9Aural Single click when
switching ON or OFF
Resistors Cracks or
discoloring 9Visual Check Ohms of optional
braking res.
Noise 9Power down,
manually rotate
Rotation must be
smooth
Main
circuit
Cooling fan
Dust 9Visual Vacuum to clean
Overall No odor,
discoloring,
corrosion
9Visual No abnormalities
Control
circuit Capacitor No leaks or
deformation
Visual Undistorted appearance
Display LEDs Legibility Visual All LED segments work
Note1:The life of a capacitor is affected by the ambient temperature. See “Capacitor
Life Curve” on page 6–11.
Note2:The inverter must be cleaned periodically. If dust accumulates on the fan and
heat sink, it can cause overheating of the inverter.

69

Troubleshooting and
Maintenance
6 9
Troubleshooting and
Maintenance