Filter
Top Products
168
Precautions for Maintenance and Inspection
Main circuit
Conductors
,
cables
(1) Check
conducto
rs for
distortion.
(2) Check
cable
sheaths
for
breakage
.
#
#
(1), (2) Visual
check.
(1), (2) No
fault.
Term inal
block
Check for
damage.
#
Visual check No fault
Inverter
module,
converter
module
Check
resistance
across
terminals.
#
Disconnect
cables from
inverter and
measure
across
terminals R, S,
T P, N, and
across U, V, W
P, N with a
meter in 100Ω
range.
Refer to page
170.
Analog
meter
Smoothing
capacitor
(1) Check for
liquid
leakage.
(2) Check for
safety
valve
protectio
n and
bulge.
(3) Measure
electrosta
tic
capacity.
#
#
#
(1), (2) Visual
check.
(3) Measure
with
capacity
meter.
(1), (2) No
fault.
(3) 85% or
more of
rated
capacity.
Capacity
meter
Relay
(1) Check for
chatter
during
operation
.
(2) Check for
rough
surface
on
contacts.
#
#
(1) Auditory
check.
(2) Visual
check.
(1) No fault.
(2) No fault.
Area of
Inspection
Inspection
Item
Description
Interval
Method Criterion Instrument
Customer
Check
Daily
Periodic*
1 year
2 years