Maintenance and Inspection
Monthly and Yearly Inspection Chart
Inspection
Cycle
Item Inspected
Check for…
Month
Year
Inspection
Method
Criteria
Ambient
environment
Extreme
temperatures
& humidity
9
Thermometer,
hygrometer
Ambient temperature
between – 10 to 40
q
C,
non
-
condensing
Major devices
Abnormal
noise & vib.
9
Visual and aural
Stable environment for
electronic controls
Overall
Power supply
voltage
Voltage
tolerance
9
Digital 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
9
Digital volt meter,
GND to terminals
5 M
:
or greater
Mounting
No loose
screws
9
Torque wrench
M3
:
0.5 – 0.6 Nm
M4
:
0.98 – 1.3 Nm
M5
:
1.5 – 2.0 Nm
Components
Overheating
9
Thermal trip
events
No trip events
Housing
Dirt, dust
9
Visual
No abnormalities
Terminal block Secure
connections
9
Visual
No abnormalities
Smoothing
capacitors
Leaking,
swelling
9
Visual
No abnormalities
Relay
(
s
)
Chattering
9
Aural
Single click when
switching ON or OFF
Resistors
Cracks or
discoloring
9
Visual
Check Ohms of optional
braking res.
Noise
9
Power down,
manually rotate
Rotation must be
smooth
Main
circuit
Cooling fan
Dust
9
Visual
Vacuum to clean
Overall
No odor,
discoloring,
corrosion
9
Visual
No abnormalities
Control
circuit
Capacitor
No leaks or
deformation
Visual
Undistorted appearance
Display LEDs
Legibility
Visual
All LED segments work
Note 1
:
The life of a capacitor is affected by the ambient temperature. See
“Capacitor
Life Curve” on page 6–11
.
Note 2
:
The inverter must be cleaned periodically. If dust accumulates on the fan and
heat sink, it can cause overheating of the inverter.
6
9
T
roubleshooting and
Maintenanc
e
6
−
9
T
roubleshooting and
Maintenance