7.4 List of Periodic Replacement Parts
Each part of the inverter has its own service life that will vary according to the environmental and operating
conditions. It is recommended that the following parts be replaced at the specified intervals.
When the replacement is necessary, consult your Fuji Electric representative.
Table 7.4-1 Replacement Parts
Part name
Standard replacement intervals
(See Note below.)
DC link bus capacitor 10 years (7 years in the ND mode)
Electrolytic capacitors on printed circuit boards 10 years (7 years in the ND mode)
Cooling fans 10 years (7 years in the ND mode)
Fuses 10 years (7 years in the ND mode)
Note. These replacement intervals are based on the inverter’s service life estimated at a surrounding temperature
of 40°C at 100% (HHD-mode inverters) or 80% (ND-/HD-/HND-mode inverters) of full load. In environments
with an ambient temperature above 40°C or a large amount of dust or dirt, the replacement intervals may be
shorter. The condition for inverters of FRN0020E2■-2/FRN0012E2■-4/FRN0011E2■-7 or below
capacity models is a load ratio of 80% even for HHD-mode.
Notes for periodic replacement of parts
(1) The replacement intervals listed above are a guide for almost preventing parts from failure if those parts are
replaced with new ones at the intervals. They do not guarantee the completely fault-free operation.
(2) Table 7.4-1 does not apply to unused spare parts being kept in storage.
It applies only when they are stored under the temporary and long-term storage conditions given in Chapter 1
“1.3.2 Storage environment” and energized approximately once a year.
(3) Cooling fans can be replaced by users. As for other parts, only the persons who have finished the Fuji Electric
training course can replace them. For the purchase of spare cooling fans and the request for replacement of
other parts, contact the sales agent where you purchased the product or your nearest Fuji Electric
representative.
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