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