Omron SYSDRIVE MX2 SERIES User Manual page 387

Inspection Inspection
part item
Connection
conductor
and wire
Terminal
block
Inverter unit
Converter
unit
(including
the resistor)
Main
circuit
Smoothing
capacitor
Relay
Control Operation
circuit check
Protection
circuit
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Inspection
period
Periodic
Inspection point
Check that there
is no distortion √
with the
conductor.
Check that there
√
is no tearing in the
wire coverings.
Check that there
√
is no damage.
Check the
resistance
between the
terminals.
√
Check that there
*1
is no liquid
leakage.
√
Check that the
safety valve has
not come out and
that there are no
bulges.
Check that there √
is no abnormal
sound during
operation.
Check that there √
is no rough
surface on the
contact.
√
Check the
balance of output
voltage levels
between phases
in single Inverter
run.
√
Check that there are
no errors in
protection and
display circuits
through sequence
protection operation.
8-1 Inspection and Maintenance
Inspection
method
Visual inspection No faults
Visual inspection No faults
√ Remove the wirings Refer to
of the Inverter's "Checking the
main circuit terminal Inverter and
block and measure Converter" on
between terminal R/ page 8-6.
L1, S/L2, T/L3 and Inverter unit
terminals P/+2, N/−, replacement
and between reference
terminals U/T1, V/ Start/stop: 10
T2, W/T3 and cycles
terminal P/+2, N/−,
in the ×1Ω range.
Visual inspection No faults
Acoustic No faults
inspection
Visual inspection No faults
Measure the Phase-to-phase
voltage between voltage balance
Inverter main 200-V class: 4 V max.
circuit terminals 400-V class: 8 V max.
U/T1, V/T2 and
W/T3.
Short-circuit or Error is found in
open the Inverter the sequence.
protection circuit
output under
simulated
conditions.
Measurement
Criteria
device
Analog
tester
6
*3
Capacity
meter
Digital
multimeter
Rectifier
Voltmeter
8-4
8