Hitachi P1-00041HFEF, Basic Manual

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6-5
Chapter 6
Inspection and maintenance
6.6 Smoothing capacitor life span curve
※
80% of the ND rated current value for continuous drive.
*1)The ambient temperature is considered to be
measured around 5 cm of the bottom centre of the
inverter (Atmosphere temperature). If the inverter is in
an enclosure, it will be the temperature inside the case.
6.7 Lifespan alarm output
・
Thanks to the self-diagnostic, you can output an alarm in
regards of the inverter own internal components lifespan
when the lifespan is nearing to its end (Including the circuit
board smoothing capacitor and cooling-fan, and excluding the
main circuit smoothing capacitor). Use this to get a reference
for when the components should be replaced. Particularly,
consult the lifespan diagnosis monitor [dC-16] and the
output terminal function selection [CC-01]
～
[CC-07].
It should be noted that the warning itself is based on the
design lifespan, and thus, is not a guaranteed measurement.
Depending on the environment, the operation conditions, etc.
problems may arise, to avoid that, is recommended an early
maintenance.
※
80% of the ND rated current value for continuous drive.
*2) The smoothing capacitor has a limited life because of
the chemical reactions occurring inside the capacitor
while operating. The capacitor should be replaced after
10 years of use, as a reference standard (10 years is not
the guaranteed lifespan, but rather, the design lifespan).
Note that the smoothing capacitor lifespan will be
shortened if the inverter is used at a high ambient
temperature or with a heavy load that requires a
current beyond the rated current.
Ambient temperature (°C)
10
20
30
40
50
0
-10
1 2 3 4 5 6 7 8 9 10
Capacitor life span
(years)
For continuous supplying
power of 24h a day