Periodical Inspection On The Replacement Parts; Cooling Fan Inspection; Smoothing Aluminum Electrolytic Capacitor Inspection - Toshiba TOSVERT VF-AS3 Instruction Manual

14. 2. 3

Periodical inspection on the replacement parts

The inverter consists of a large number of electronic parts such as semiconductor devices. The follow-
ing parts age because of the configurations or the physical properties. If they are left unused for a long
time, the performance of the inverter will deteriorate, thus resulting in a failure. Be sure to perform peri-
odical inspection for preventive maintenance.
For replacement of each replacement part, contact your Toshiba distributor. Do not replace the parts on
your own for safety.
• Do not replace parts.
This will result in electric shock, fire and other injury. Please call your Toshiba distributor for
repairs and replacement of expendable parts.
Prohibited
• The replacement cycle of the parts are influenced by the ambient temperature and the use con-
ditions. The replacement cycle of the parts listed here are based on the assumption that they
will be used in an environment (without corrosive gas, oil mist, dust, and metal powder, etc.) at
an ambient temperature within the specification.
Important
• The design life expectancies and the standard replacement cycles do not warrant the lives.

■ 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 10 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
WARNING
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14. Maintenance and inspection
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