Fuji Electric FRENIC-HVAC User Manual page 672

Check part
Structure such Check for:
as frame and
1) Abnormal noise or excessive
covers
vibration
2) Loose bolts (at clamp sections).
3) Deformation and breakage
4) Discoloration caused by overheat
5) Contamination and accumulation
of dust or dirt
Common
1) Check that bolts and screws are
tight and not missing.
2) Check the devices and insulators
for deformation, cracks,
breakage and discoloration
caused by overheat or
deterioration.
3) Check for contamination or
accumulation of dust or dirt.
Conductors 1) Check conductors for
and wires discoloration and distortion
caused by overheat.
2) Check the sheath of the wires for
cracks and discoloration.
Terminal Check that the terminal blocks are
blocks not damaged.
DC link bus 1) Check for electrolyte leakage,
capacitor discoloration, cracks and
swelling of the casing.
2) Check that the safety valve does
not protrude remarkably.
3) Measure the capacitance if
necessary.
Transformer Check for abnormal roaring noise
and reactor and odor.
Printed 1) Check for loose screws and
circuit board 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.
Table 10.1 List of Periodic Inspections (Continued)
Check item
10-2
How to inspect
1) Visual or auditory
inspection
2) Retighten.
3), 4), 5)
Visual inspection
1) Retighten.
2), 3)
Visual inspection
1), 2)
Visual inspection
Visual inspection
1), 2)
Visual inspection
3) Measure the
discharge time with
a capacitance probe.
Auditory, visual, and
olfactory inspection
1) Retighten.
2) Olfactory and visual
inspection
3), 4)
Visual inspection
Evaluation criteria
1), 2), 3), 4), 5)
No abnormalities
1), 2), 3)
No abnormalities
1), 2)
No abnormalities
No abnormalities
1), 2)
No abnormalities
3) The discharge time
should not be shorter
than the one
specified by the
replacement manual.
No abnormalities
1), 2), 3), 4)
No abnormalities