Omron RX Series User Manual page 601

Inspection Inspection
category item
Check output
voltage balance
between phases
during isolated
inverter run.
Control
circuit Operation
Check for
protection check
defects in
circuit
protection and
display circuits
through
sequence
protection
function test.
Check for
abnormal
vibration and
Cooling
sound.
fan
Cooling
system Check for loose
connections.
Check for
Cooling fin
clogging.
Check for
blown-out LEDs.
Indicator
Clean display
Display surface.
Check indicated
Meter
value.
Check for
abnormal
vibration and
sound.
General
Check for
abnormal odor.
Motor
Perform megger
check
Isolation
(between motor
resistance
terminal block
and ground).
*1. The life of a smoothing capacitor depends on the ambient temperature. For the replacement guideline, refer to A-1
Smoothing Capacitor Life Curve on page A-2.
*2. The life of the cooling fan depends on environmental conditions, such as the ambient temperature and/or dust. Check its
operation condition in daily inspections.
*3. The replacement interval (in years or cycles) shown here and the smoothing capacitor life curve provided in Appendix A-1
are based on the expected design life and not guaranteed data.
Note In case that you find any problems during inspection, contact your OMRON sales representative.
High-function General-purpose Inverter 3G3RX-V1 User's Manual (SBCE-367)
Inspection
frequency
Inspection
Periodic
point
Daily
1
year
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
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11 Maintenance and Inspection
Inspection method
2
years
Measure the line
voltage between the
inverter main circuit
terminals U/T1, V/T2,
and W/T3.
Simulate the output of
the inverter protection
circuit to be is shorted
or open.
Rotate the fan manually
with the power off.
Perform visual
inspection.
Perform visual
inspection.
Perform visual
inspection.
Clean it with a waste
cloth.
Check the indicated
values on panel meters.
Perform acoustic,
sensory, and visual
inspection.
No abnormal odor due
to overheating, damage,
etc.
Disconnect wires from
the inverter main circuit
terminals U/T1, V/T2,
W/T3 and short-circuit
the 3-phase motor

wires. Then, using a
megger, measure the
resistance between
each motor wire and the
ground terminal.
Criteria Meter
Phase-to-phase
voltage balance
200-V class:
4 V max.
400-V class:
8 V max.
Digital
multimeter,
rectifier,
voltmeter
Fault protection
functional in
sequence
Smooth rotation,
no faults
Replacement
interval:
*2 *3
10 years
No clogging
Indicator lit
Voltmeter,
Specified value,
ammeter,
control value
etc.
No faults
No faults
500-VDC
5 MΩ min.
megger
11 - 7
11