Display Of The Life Of The Inverter Parts - Mitsubishi Electric FR-F700 Series Instruction Manual

Inspection
Inspection Item
Item
(1) Check balance of
output voltages
across phases with
the inverter
operated alone.
Operation
(2) Perform sequence
check
Control
protective
circuit
operation test to
Protective
ensure no fault in
circuit
protective and
display circuits.
Smoothing Check for fluid leakage
capacitors and clack.
(1) Check for unusual
vibration and noise.
Cooling Cooling
system fan
(2) Check for loose
connection.
(1) Check for LED
lamp blown.
Display
(2) Clean.
Display
Check that reading is
Meter
normal.
(1) Check for unusual
vibration and noise.
General
(2) Check for unusual
Motor odor.
Check with megger
Insulation
(across terminals and
resistance
ground terminal).
*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.
Parts
Main circuit capacitor
Control circuit capacitor
Inrush current limit circuit
Cooling fan
Interval
Periodic*
Judgement level
85% of the initial capacity
Estimated 10% life remaining
Estimated 10% life remaining (Power on: 100,000 times left)
Less than 40% of the predetermined speed
Method
(1) Measure voltages (1) Phase to phase
across the inverter voltage balance
output terminals U- is within 4V for
V-W. the 200V and
(2) Simulatively short or within 8V for the
open the protective 400V
circuit output (2) Fault must occur
terminals of the because of
inverter. sequence.
Visual check and judge
by the life of the main
circuit capacitor. (Refer
to page 81.)
(1) Turn by hand with
power off.
(2) Visual check. No unusual
(3) Judge by the life vibration and noise.
check of the cooling
fan (Refer to page 81.)
(1) Lamps indicate
indicator lamps on (1) Check that
panel. lamps are lit.
(2) Clean with rag
Must satisfy
Check the readings of
specified and
the meters on the
management
panel.
values.
(1) Auditory, sensory,
visual checks.
(2) Check for unusual
(1)(2) No fault
odor due to
overheat, damage,
etc.
Disconnect cables from
Ω
U, V, W
5M
(including motor cables)
Inspection Item
Criterion Instrument
Digital
multimeter,
rectifier
type
voltmeter
Voltmeter,
ammeter,
etc.
500V
or more.
megger
6
81