Mitsubishi Electric FR-F700 Series, Инструкция по эксплуатации

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81
Inspection Item
6
P
R
E
CAUT
IO
NS
FOR
M
A
INTE
NANCE
AND INS
P
E
C
TION
*Consult us for periodic inspection.
6.1.4 Display of the life of the inverter parts
The self-diagnostic alarm is output when the life span of the control circuit capacitor, cooling fan, each parts of the
inrush current limit circuit is near to give an indication of replacement time .
For the life check of the main circuit capacitor, the alarm signal (Y90) will not be output if a measuring method of (2)
is not performed.
(Refer to page 82.)
The life alarm output can be used as a guideline for life judgement.
Control
circuit
Protective
circuit
Operation
check
(1) Check balance of
output voltages
across phases with
the inverter
operated alone.
(1) Measure voltages
across the inverter
output terminals U-
V-W.
(2) Simulatively short or
open the protective
circuit output
terminals of the
inverter.
(1) Phase to phase
voltage balance
is within 4V for
the 200V and
within 8V for the
400V
(2) Fault must occur
because of
sequence.
Digital
multimeter,
rectifier
type
voltmeter
(2) Perform sequence
protective
operation test to
ensure no fault in
protective and
display circuits.
Smoothing
capacitors Check for fluid leakage
and clack.
Visual check and judge
by the life of the main
circuit capacitor.
(Refer
to page 81.)
Cooling
system
Cooling
fan
(1) Check for unusual
vibration and noise.
(1) Turn by hand with
power off.
(2) Visual check.
(3) Judge by the life
check of the cooling
fan
(Refer to page 81.)
No unusual
vibration and noise.
(2) Check for loose
connection.
Display
Display
(1) Check for LED
lamp blown.
(1) Lamps indicate
indicator lamps on
panel.
(2) Clean with rag
(1) Check that
lamps are lit.
(2) Clean.
Meter
Check that reading is
normal.
Check the readings of
the meters on the
panel.
Must satisfy
specified and
management
values.
Voltmeter,
ammeter,
etc.
Motor
General
(1) Check for unusual
vibration and noise.
(1) Auditory, sensory,
visual checks.
(2) Check for unusual
odor due to
overheat, damage,
etc.
(1)(2) No fault
(2) Check for unusual
odor.
Insulation
resistance
Check with megger
(across terminals and
ground terminal). Disconnect cables from
U, V, W
(including motor cables)
5M
Ω
or more.
500V
megger
Parts Judgement level
Main circuit capacitor 85% of the initial capacity
Control circuit capacitor Estimated 10% life remaining
Inrush current limit circuit Estimated 10% life remaining (Power on: 100,000 times left)
Cooling fan Less than 40% of the predetermined speed
A
rea o
f
Ins
p
ec
tion
Inspection
Item
Inspection Item
Interval
Method Criterion Instrument
Cus
tom
e
r's
ch
eck
Da
ily
Periodic*
1
ye
ar
s
2
ye
ar
s