Fuji Electric Frenic-Mini - Page 154

7-3
Table 7.1 Continued
Check part Check item How to inspect Evaluation criteria
Filtering
capacitor
(Note)
1) Check for electrolyte leakage,
discoloration, cracks and
swelling of the case.
2) Check if the safety valve does
not protrude remarkably.
3) Measure the capacitance if
necessary.
1),2)
Visual inspection
3) Measure
discharge time
with capacitance
probe.
1),2)
No abnormalities
3) The discharge
time is not shorter
than time
specified by the
replacement
manual.
Braking
resistor
1) Check for odor caused by
overheat and cracked
insulator.
2) Check for broken wire.
1) Smelling and
visual inspection
2) Visual inspection
or measurement
with multimeter
under
disconnection of
one lead
1) No abnormalities
2) Within ± 10% of
the specified
resistance
Transformer
and reactor
Check for abnormal roaring
noise and odor.
Hearing, visual and
smelling inspection
No abnormalities
Main circuit
Magnetic
contactor
and relay
1) Check for chatters during
operation.
2) Check for rough contacts.
1) Hearing
inspection
2) Visual inspection
1), 2)
No abnormalities
Control circuit
Printed
circuit board
(Note)
1) Check for loose screws and
connectors.
2) Check for odor and
discoloration.
3) Check for cracks, breakage,
deformation and remarkable
rust.
4) Check the capacitors for
electrolyte leaks and
deformation.
1) Retighten.
2) Smelling and
visual inspection
3), 4)
Visual inspection
1), 2), 3), 4)
No abnormalities
Cooling fan
(Note)
1) Check for abnormal noise
and excessive vibration.
2) Check for loose bolts.
3) Check for discoloration
caused by overheat.
1) Hearing and visual
inspection, or turn
manually (be sure
to turn the power
off).
2) Retighten.
3) Visual inspection
1) Smooth rotation
2), 3)
No abnormalities
Cooling system
Ventilation
path
Check the heat sink, intake and
exhaust ports for clogging and
foreign matter.
Visual inspection No abnormalities
(Note) The judgement level of part replacement period with Menu #5 "Maintenance information" should be
used as a guide. Determine the replacement period on the basis of the standard replacement years. (See
Section 7.5 "List of Periodical Replacement Parts.")
If the inverter is stained, wipe it off with a chemically neutral cloth to remove dust, use a vacuum
cleaner.