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E6581381
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1) Cooling fan
The fan, which cools down heat-generating parts, has a service life of about 30,000 hours (about 2 or 3
years of continuous operation). The fan also needs to be replaced if it makes a noise or vibrates
abnormally.
2) Smoothing capacitor
• Main circuit
The smoothing capacitors applied to this inverter in the main circuit DC section are film type
capacitors. Those life time in design value is 15 years, but it is recommended to replace them after it
is used for about 10 years under normal conditions. Since the smoothing capacitors are mounted on
a printed circuit board, it needs to be replaced together with the circuit board.
• Control circuit
The smoothing aluminum electrolytic capacitor degrades in performance because of ripple current,
etc. The life time in design value is 15 years, but it is recommended to replace them after it is used for
about 10 years under normal conditions. Since the smoothing capacitors are mounted on a printed
circuit board, it needs to be replaced together with the circuit board.
<Criteria for appearance check>
• Absence of liquid leak
• Absence of case dampaged
Note: The operation time is helpful for roughly determining the time of replacement. For the replacement of
parts, contact your nearest Toshiba inverter distributor. For safety’s sake, never replace any part on
your own. (Parts replacement alarms can be known by monitor and alarm output, if it is set.
⇒ See section 6.17.14.
■ Standard replacement cycles of principal parts
As guides, the table below lists part replacement cycles that were estimated based on the assumption that
the inverter would be used in a normal use environment under normal conditions (ambient temperature,
ventilation conditions, and energizing time). The replacement cycle of each part does not mean its service
life but the number of years over which its failure rate does not increase significantly.
Part name Standard
replacement cycle
Replacement mode and others
Cooling fan 2 to 3 years Replacement with a new one
Main circuit
smoothing electrolytic
capacitor
10 years Replacement with a new one
Relay and contactor - Whether to replace or not depends on the check results
Aluminum electrolytic
capacitor mounted on
a printed circuit board
10 years Replace with a new circuit board
Note: The life of a part greatly varies depending on the environment of use.