Fuji Electric FVR-E11S-7EN

8-2
Common 1) Check if bolts and screws are tight
and not missing.
2) Check the devices and insulators for
deformation, cracks, breakage and
discoloration caused by overheat and
deterioration.
3) Check for foulness and dust.
1) Retighten.
2), 3) Visual
inspection
1), 2), 3) No
abnormalities
Conductor
and wire
1) Check the conductor for discoloration
and distortion caused by overheat.
2) Check the sheath of the cable for
cracks and discoloration.
1), 2) Visual
inspection
1), 2) No
abnormalities
Terminal
block
Damage Visual inspection No abnormalities
Main circuit
Smoothing
capacitor
1) Check for electrolyte leakage,
discoloration, cracks and swelling of
the case.
2) Check for safety valve protrusion and
remarkably protruding valve
3) Measure the capacitance.
1), 2) Visual
inspection
3) Monitor H42
Life judgment
and measure
with
capacitance
probe.
1), 2) No
abnormalities
3) Capacitance ≧
(Initial value) x
0.85
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
displayed
resistance
Transformer Check for abnormal roaring noise and
odor.
Hearing, visual
and smelling
inspection
No abnormalities
Main circuit
Relay 1) Check for chatters during operation.
2) Check for rough contacts.
1) Hearing
inspection
2) Visual
inspection
1),2)
No abnormalities
Control circuit
Control
printed circuit
board,
connector
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 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
4) Life judgment
based on
maintenance
data*
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
Remarks: Remove foulness using cleaning cloth which is chemically neutral. Use a vacuum cleaner to
remove dust.