LSIS LSLV-S100 - Page 407

Maintenance
393
Inspection
area
Inspection
item
Inspection
details
Inspection
method
Judgment
standard
Inspection
equipment
cables?
Is there any
damage to
cable
insulation?
Terminal block
Is there any
damage?
Visual
inspection
No
abnormality
-
Smoothing
condenser
Measure
electrostatic
capacity.
Measure with
capacity
meter.
Rated
capacity over
85%
Capacity meter
Relay
Is there any
chattering
noise during
operation?
Visual
inspection
No
abnormality
-
Is there any
damage to the
contacts?
Visual
inspection
Braking
resistor
Is there any
damage from
resistance?
Visual
inspection
No
abnormality
Digital multimeter /
anaog tester
Check for
disconnection.
Disconnect
one side and
measure with
a tester.
Must be
within ±10%
of the rated
value of the
resistor.
Control
circuit
Protection
circuit
Operation
check
Check for
output voltage
imbalance
while the
inverter is in
operation.
Measure
voltage
between the
inverter output
terminal U/ V/
W.
Balance the
voltage
between
phases:
within 4V for
200V series
and within 8V
for 400V
series.
Digital multimeter
or DC voltmeter
Is there an
error in the
display circuit
after the
sequence
protection
test?
Test the
inverter ouput
protection in
both short and
open circuit
conditions.
The circuit
must work
according to
the
sequence.
Cooling
system
Cooling fan
Are any of the
fan parts
Check all
connected
No
abnormality
-