7-3
Table 7.1 Continued
Check part
Check item
How to inspect
Evaluation criteria
Control ci
rcuit
Printed
circuit board
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
1) Smooth rotation
2), 3)
No
abnormalities
Cooling s
ystem
Ventilation
path
Check the heat sink, intake and
exhaust ports for clogging and
foreign materials.
Visual inspection
No abnormalities
If the inverter is stained, wipe it off with a chemically neutral cloth to remove dust and use a vacuum
cleaner.
7.3 List of Periodical Replacement Parts
Each part of the product has its own service life that will vary according to the environmental and
operating conditions. It is recommended that the following parts be replaced as specified below.
When the replacement is necessary, contact your Fuji Electric representative.
Table 7.2 Replacement Parts
Part name
Standard replacement intervals
DC link bus capacitor
10 years
Electrolytic capacitors on the printed circuit boards
10 years
Cooling fan
10 years
(Note) These replacement intervals are based on the estimated service life of the inverter at an ambient
temperature of 40
°
C under 80% of full load. In environments with an ambient temperature above
40
°
C or a large amount of dust or dirt, the replacement intervals may need to be reduced.
Standard replacement intervals mentioned above is only a guide for replacement, not a guaranteed
service life.
