Mitsubishi Electric FR-E560 Series Instruction Manual page 193

Inspection
Description
Item
(1) Check for
chatter during
operation.
Relay
(2) Check for rough
surface on
contacts.
(1) Check balance
of output
voltages across
phases with
inverter operated
independently.
Operation
(2) Perform
sequence
check
protective
operation test to
make sure there
is no fault in
protective or
display circuits.
(1) Check for
unusual vibration
and noise.
Cooling fan
(2) Check for loose
connection.
(1) Check for LED
lamp blown.
Display
(2) Clean.
Check that reading
is normal.
Meter
(1) Check for
unusual vibration
and noise.
(2) Check for
General
unusual odor.
Check with megger
Insulation
(across terminals
and ground
resistance
terminal).
MAINTENANCE/INSPECTION
Interval
Periodic*
Method
(1) Auditory check. (1) No fault.
(2) Visual check.
(1) Measure
voltage across
inverter output
terminals U-V-
W.
(2) Simulate
connection of
inverter
protective
circuit output
terminals.
(1) Turn by hand
with power off.
(2) Visual check.
(1) Lamps indicate
indicator lamps
on panel.
(2) Clean with rag.
Check reading of
meters on panel.
(1) Auditory,
sensory, visual
checks.
(2) Check for
unusual odor
due to
overheat,
damage, etc.
Disconnect cables
from U, V, W,
including motor
cables.
183
Criterion Instrument
(2) No fault.
(1) Phase-to-
phase
voltage
balance
within 12V.
Digital
(2) Fault must
multimeter,
occur
rectifier type
because of
voltmeter
sequence.
No unusual
vibration and
unusual noise.
(1) Check that
lamps are
lit.
Must satisfy Voltmeter,
ammeter,
specified and
etc.
management
values.
(1), (2) No
fault.
5M Ω or more. 500V
megger
6