Omron SYSDRIVE MX2 SERIES, User Manual

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11 - 5
11 Maintenance and Inspection
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
11
-1 Main
ten
ance a
nd I
n
spe
ctio
n
11
11-1-
4 Daily/Periodic Inspection Items
Main
circuit Inverter
unit
Converter
unit
(including
resistors) Check resis-
tance between
terminals.
3
Disconnect wires from
the inverter main circuit
terminal block and mea-
sure the resistance
between the terminals
R/L1, S/L2, T/L3 and the
terminals P/
+
2, N/
−
, and
between the terminals
U/T1, V/T2, W/T3 and the
terminals P/
+
2, N/
−
with a
tester in the
×
1
Ω
range.
Refer to 11-1-7
Inverter/Converter
Unit Test
on page
11-7.
Inverter unit replace-
ment interval:
10
6
start-stop cycles
*3
Analog
tester
Smoothing
capacitor
*1
Check that there
is no liquid leak-
age.
3
Perform visual inspec-
tion. No faults Capacity
meter
Check that the
safety valve
does not come
out and that
there is no
bulge.
3
Relay Check for chat-
tering sound
during opera-
tion.
3
Perform acoustic inspec-
tion. No faults
Check for rough
contact surface.
3
Perform visual inspec-
tion. No faults
Control
circuit,
protection
circuit Operation
check Check output
voltage balance
between phases
during
stand-alone
inverter opera-
tion.
3
Measure the line voltage
between the inverter
main circuit terminals
U/T1, V/T2, and W/T3. Phase-to-phase volt-
age balance Digital
multimeter
Rectifier
Voltmeter
200-V class: 4 V max.
400-V class: 8 V max.
Check that there
is no error in
protection and
display circuits
through
sequence pro-
tection function
test.
3
Short-circuit or open the
inverter protection circuit
output under simulated
conditions. Error is found in the
sequence.
Cooling
system Cooling
fan Check for
abnormal vibra-
tion and sound.
3
Rotate the fan manually
with the power off. Smooth rotation, no
faults
Replacement inter-
val:
10 years
*2*3
Check for loose
connections.
3
Perform visual inspec-
tion.
Cooling
fin Check for clog-
ging.
3
Perform visual inspec-
tion. No clogging
Inspection
category
Inspection
item
Inspection
point
Inspection
frequency
Inspection method Criteria Meter
Daily
Periodic
1 year
2 years