Mitsubishi Electric FR-V500 Series Instruction Manual page 100

Area of Inspection
Inspection Item
(1) Check with megger
General (2) Check for loose
(3) Check for overheat
(4) Clean.
(1) Check conductors
Conductors,
(2) Check cable
cables
Main circuit
Terminal block Check for damage.
(1) Check for chatter
Relay
(2) Check for rough
(1) Check for crack in
Resistor
(2) Check for break in
(1) Check balance of
Control
circuit Operation
Protective check (2) Perform sequence
circuit
(1) Check for unusual
Cooling
Cooling fan
system (2) Check for loose
(1) Check for LED lamp
Display
(2) Clean.
Display
Check that reading is
Meter
normal.
(1) Check for unusual
General
(2) Check for unusual
Motor
Check with megger
Insulation (across terminals and
resistance earth (ground)
terminal).
* Values in parentheses indicate those for 400V class.
*Consult us for periodic inspection.
Interval
Periodic*
Description
(across main circuit
terminals and earth
(ground) terminal).
screws and bolts.
traces on the parts.
for distortion.
sheaths for
breakage.
during operation.
surface on contacts.
resistor insulation.
the cable.
output voltages
across phases with
the inverter
operated alone.
protective operation
test to ensure no
fault in protective
and display circuits.
vibration and noise.
connection.
blown.
vibration and noise.
odor.
Method
(1) Disconnect all cables
from the inverter and
measure across
terminals R, S, T, U,
(1) 5M Ω or more.
V, W and earth
(2), (3) No fault.
(ground) terminal
with megger.
(2) Retighten.
(3) Visual check.
(1), (2) Visual check. (1), (2) No fault.
Visual check No fault
(1) Auditory check.
(1), (2) No fault.
(2) Visual check.
(1) Visual check.
Cement resistance,
wire-wound resistor. (1) No fault.
(2) Disconnect one end (2) Indication
and measure with
tester.
(1) Measure voltages
across the inverter (1) Phase-to-phase
output terminals U-V- voltage balance
W. within 4V (8V) for
(2) Simulatively short or 200V (400V).
open the protective (2) Fault must occur
circuit output because of
terminals of the sequence.
inverter.
(1) Turn by hand with
No unusual vibration
power off.
and noise.
(2) Visual check.
(1) Lamps indicate
indicator lamps on (1) Check that lamps
panel. are lit.
(2) Clean with rag.
Must satisfy
Check the readings of specified and
the meters on the panel. management
values.
(1) Auditory, sensory,
visual checks.
(2) Check for unusual
(1), (2) No fault.
odor due to
overheat, damage,
etc.
Disconnect cables from
5M Ω or more.
U, V, W (including motor
cables).
97
Check items
Criterion Instrument
500VDC
class megger
Digital
multimeter,
rectifier type
voltmeter
Voltmeter,
ammeter, etc.
500V megger
7