Toshiba VF-S9 manual Making a call for servicing, Keeping the inverter in storage

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The operation time is helpful for roughly determining the time of replacement. For the replacement of parts, contact the service network or Toshiba branch office printed on the back cover of this instruction manual.

■Standard replacement cycles of principal parts

The table below provides a listing of the replacement cycles of parts when used under normal conditions (average ambient temperature: 30°C, load factor: not more than 80%, operation time: 12 hours per day). 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 mode and others
	replacement cycle
Cooling fan	2 to 3 years	Replacement with a new one
Smoothing capacitor	5 years	Replace with a new one (depending on the check results)
Circuit breaker and	-	Whether to replace or not depends on the check results
relays
Timer	-	Whether to replace or not depends on the operation time
Fuse	10 years	Replacement with a new one
Aluminum capacitor	5 years	Replace with a new circuit board (depending on the
on printed circuit		check results)
board

(Extract from "Guide to periodical inspections of general-purpose inverters" issued by the Japan Electric In- dustries Association.)

Note) The life of a part greatly varies depending on the environment of use.

14.3 Making a call for servicing

For the Toshiba service network, refer to the back cover of this instruction manual. If defective conditions are en- countered, please contact the Toshiba service section in charge via your Toshiba dealer.

When making a call for servicing, please inform us of the contents of the rating label on the right panel of the inverter, the presence or absence of optional devices, etc., in addition to the details of the failure.

14.4 Keeping the inverter in storage

Take the following precautions when keeping the inverter in storage temporarily or for a long period of time.

1.Store the inverter in a well-ventilated place away from heat, damp, dust and metal powder.

2.If the printed circuit board in your inverter has an anti-static cover (black cover), do not leave it detached

from the circuit board during storage, though the cover must be detached before turning on the inverter.

14 3. If no power is supplied to the inverter for a long time, the performance of its large-capacity electrolytic ca- pacitor declines.

When leaving the inverter unused for a long time, supply it with electricity once every two years, for 5 hours or more each, to recover the performance of the large-capacity electrolytic capacitor and also to check the function of the inverter. It is advisable not to supply the commercial power directly to the inverter but to gradually increase the power supply voltage with a transformer, etc.

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