Mitsubishi Electric FR-S500 Instruction Manual page 59

Precautions for maintenance and inspection
Inspection
Inspection Item
Item
(1) Check
Operation
check
(2) Perform
(1) Check for
Cooling
fan
(2) Check for loose
(1) Check for LED
(2) Cleaning
Indication
Check that reading
is normal.
Meter
(1) Check for
General
(2) Check for
(1) Check with
Insulation
resistance
*Consult us for periodic inspection.
Interval
Periodic*
balance of
output
voltages
across
phases with
the inverter
operated
alone.
sequence
protective
operation test
to ensure no
fault in
protective
and display
circuits.
unusual
vibration and
noise.
screws and
bolts
lamp blown.
unusual
vibration and
noise.
unusual odor.
megger
(across
terminals and
earth (ground)
terminal).
Method Criterion
(1) Measure (1) Phase-to-
voltages phase
across the voltage
inverter balance
output within 4V for
terminals 200V
U-V-W. (2) Fault must
(2) Simulatively occur
short or because of
open the sequence.
protective
circuit
output
terminals of
the inverter.
(1) Turn by hand No unusual
with power vibration and
off. noise.
(2) Visual check
(1) Lamps (1) Check that the
indicate lamps are lit.
indicator
lamps on
panel.
(2) Clean with
rag.
Check the Must satisfy
readings of the specified and
meters on the management
panel. values.
(1) Auditory, (1), (2) No fault
sensory,
visual
checks.
(2) Check for
unusual odor
due to
overheat,
damage, etc.
(1) Disconnect (1) 5MΩ or more 500V megger
cables from
U, V, W
(including
motor
cables)
54
Instrument
Digital
multimeter,
rectifier type
voltmeter
Voltmeter,
ammeter,etc.