Omron 3G3M1-A2075-ECT - Page 540

Inspec-
tion cat-
egory
Inspec-
tion item
Inspection
point
Inspec-
tion fre-
quency
Inspection method Criteria Meter
Daily
Peri-
odic
1 year 2 years
Main cir-
cuit
General Perform meg-
ger check
(Between main
circuit termi-
nals and
ground termi-
nal).
Required
Disconnect I/O wires
from the inverter
main circuit terminal
block and remove
the control terminal
block PCB. Then, af-
ter removing the
short-circuit bar for
switching the inverter
built-in filter function,
measure using a
megger the resist-
ance between the
ground terminal and
the short-circuited
terminals L1/R, L2/S,
L3/T, U, V, W, P(+),
P1, N(-) and DB.
5 MΩ min. 500-VDC
class
megger
Check for
loose bolts and
screws.
Required
Retighten loose bolts
and screws.
No faults
Check each
part for traces
of overheating.
Required
Perform visual in-
spection.
No faults
Conduc-
tors/wires
Check for dis-
torted conduc-
tors.
Required
Perform visual in-
spection.
No faults
Check for bro-
ken cable
sheaths.
Required
Terminal
Blocks
Check for dam-
age.
Required
Perform visual in-
spection.
No faults
Smooth-
ing ca-
pacitor
*1
Check that
there is no liq-
uid leakage.
Required
Perform visual in-
spection.
No faults Capacity
meter
Check that the
safety valve
does not come
out and that
there is no
bulge.
Required
10 Maintenance and Inspection
10-4
M1 Series EtherCAT Type User’s Manual (I670)