Mitsubishi Electric FR-S540E-0.4K-EC Instruction Manual page 59

Precautions for maintenance and inspection
Inspection
Inspection Item
Item
(1) Check with
(2) Check for
General
(3) Check for
(4) Cleaning
(1) Check
Conductors,
cable
(2) Check cable
Terminal Check for
block damage.
Inverter
Check
module,
resistance
Converter
across terminals.
module
(1) Check for
(2) Check for
Smoothing
capacitor
(3) Measure
(1) Check for
Relay
(2) Check for
Interval
Periodic*
megger
(across main
circuit
terminals and
earth
terminal).
loose screws
and bolts
overheat
traces on the
parts
conductors
for distortion.
sheaths for
breakage
liquid
leakage.
safety valve
projection
and bulge.
electrostatic
capacity.
chatter
during
operation.
rough
surface on
contacts.
Method Criterion
(1)5M Ω or more
(1) Disconnect
all cables (2), (3) No fault
from the
inverter and
measure
across
terminals
L1, L2, L3,
U, V, W and
earth
terminal
with
megger.,
(2) Retighten
(3) Visual
check
(1), (2) Visual (1), (2) No fault
check
Visual check No fault
Disconnect all
cables from the
inverter and
measure
across
Refer to page
terminals L1,
56.
L2, L3 ↔ +, -
and U, V,
W ↔ +, - with a
meter range of
100 Ω .
(1), (2) Visual (1), (2) No fault.
check (3) 85% or more
(3) Measure of the rated
with capacity
capacity
meter
(1) Auditory (1) No fault
check (2) No fault
(2) Visual
check
54
Instrument
500VDC class
megger
Analog tester
Capacity
meter