IMO VXSM75-1 Instruction Manual page 79

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 dust.
Conductor 1) Check the conductor for discoloration 1), 2) Visual
and wire and distortion caused by overheat.
2) Check the sheath of the cable for
cracks and discoloration.
Terminal Damage
block
Smoothing 1) Check for electrolyte leakage,
capacitor discoloration, cracks and swelling of
the case.
2) Check for safety valve protrusion.
3) Measure the capacitance
Resistor 1)Check for odor caused by overheat
and cracked insulator.
2) Check for broken wire.
Transformer Check for abnormal noise
and odor.
Relay 1) Check for chatters during operation.
2) Check for rough contacts.
Control 1) Check for loose screws and
printed connectors.
circuit 2) Check for odor and discoloration.
board, 3) Check for cracks, breakage,
connector deformation and rust.
4) Check the capacitors for electrolyte
leaks and deformation.
Cooling fan 1) Check for abnormal noise and
excessive vibration.
2) Check for loose bolts.
3) Check for discoloration caused by
overheat.
4) Check that fan is operating when
power is restored.
Ventilation Check the heat sink, intake and
path exhaust ports for clogging and foreign
matter.
Remarks: Remove dust using cleaning cloth
which is chemically neutral. Use a vacuum
cleaner to remove dust.
8-2
1) Retighten 1), 2), 3)
2), 3) Visual No abnormalities
inspection
1), 2)
inspection No abnormalities
Visual inspection No abnormalities
1), 2) 1), 2)
Visual inspection No abnormalities
3) Monitor H42 Life 3) Capacitance>
judgment and (Initial value) x
measure with 0.85
capacitance probe
1) Smelling and 1) No abnormalities
visual inspection 2) Within ± 10% of
2) Visual inspection displayed resistance
or measurement
with multimeter under
disconnection of
one lead
Hearing, visual and No abnormalities
smelling inspection
1) Hearing 1),2)
inspection No abnormalities
2) Visual inspection
1) Retighten. 1),2),3),4)
2) Smelling and No abnormalities
visual inspection
3), 4) Visual
inspection
1) Hearing and 1) Smooth rotation
visual inspection, 2),3)
or turn manually No abnormalities
(be sure to turn
the power off)
2) Retighten.
3) Visual inspection
4) Life judgment
based on
maintenance data*
Visual No abnormalities
inspection
Maintenance and Inspection
=