Toshiba TOSVERT VF-AS3, Instruction Manual

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14. Maintenance and inspection
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9
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■ Cooling fan inspection
The inspection items for the cooling fans are as follows:
• Are the cooling fans rotating stably?
• Is any unusual sound or vibration found?
The design life expectancies of the cooling fans that cool down the heat-generating parts are as fol-
lows:
VFAS3-2004P to 2550P,
VFAS3-4004PC to 4132KPC: Design life expectancy 10 years
VFAS3-4160KPC to 4280KPC: Design life expectancy 5 years (9 years for inner air fan)
* Average ambient temperature 40°C, load factor 80% or less, 24-hour operation per day
Also, replace the fans when unusual sound or vibration is found.
For replacement of the cooling fans, contact your Toshiba distributor.
■ Smoothing aluminum electrolytic capacitor inspection
The inspection items for the smoothing aluminum electrolytic capacitor are as follows:
• Is liquid leak found?
• Is the safety valve lifted?
The design life expectancy of the smoothing aluminum electrolytic capacitor is 10 years.
* Average ambient temperature 40°C, load factor 80% or less, 24-hour operation per day
For replacement of the smoothing aluminum electrolytic capacitor, contact your Toshiba distributor.
The inverter unit may need to be replaced depending on the capacity because the smoothing alumi-
num electrolytic capacitor is mounted on the printed circuit board.
Memo
• You can check the parts replacement alarm and output signals in [Monitor mode]. For details,
refer to [8. 1. 1].
• The design life expectancy of the smoothing aluminum electrolytic capacitor becomes shorter
at high ambient temperature, and becomes longer at low ambient temperature.