Mitsubishi FR-E500 Series Instruction Manual page 159

Inspection
Description
Item
(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
Cooling fan noise.
(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.
General (2) Check for unusual
odor.
Check with megger
Insulation (across terminals and
resistance ground terminal).
* For periodic inspection, contact you nearest Mitsubishi sales representative.
Interval
Periodic*
'
(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.
143
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PROTECTIVE FUNCTIONS
Method Criterion
(1) Phase-to-
phase
voltage
balance
within 4V for
200V.
(2) Fault must
occur
because of
sequence.
No unusual
vibration and
unusual noise.
(1) Check that
lamps are lit.
Must satisfy
specified and
management
values.
(1), (2) No fault.
5MΩ or more.
Instrument
Digital
multimeter,
rectifier
type
voltmeter
Voltmeter,
ammeter,
etc.
500V
megger