Toshiba VF-FS1 instruction manual Inspection and maintenance, Regular inspection

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14. Inspection and maintenance

Danger

•The equipment must be inspected every day.

If the equipment is not inspected and maintained, errors and malfunctions may not be discovered which could lead to accidents.

•Before inspection, perform the following steps.

(1) Shut off all input power to the inverter.

Mandatory	(2)	Wait at least ten minutes and check to make sure that the charge lamp is no longer lit.
	(3)	Use a tester that can measure DC voltages (800V DC or more), and check that the voltage to the
		DC main circuits (across PA/+ and PC/-) does not exceed 45V.
	Performing an inspection without carrying out these steps first could lead to electric shock.

Be sure to inspect the inverter regularly and periodically to prevent it from breaking down because of the environment of use, such as temperature, humidity, dust and vibration, or deterioration of its components with aging.

14.1 Regular inspection

Since electronic parts are susceptible to heat, install the inverter in a cool, well-ventilated and dust-free place. This is essential for increasing the service life.

The purpose of regular inspections is to maintain the correct environment of use and to find any sign of failure or malfunction by comparing current operation data with past operation records.

Subject of	Inspection procedure			Criteria for judgement
inspection	Inspection item	Inspection	Inspection method
		cycle
	1)Dust, temperature	Occasionally	1)Visual check, check	1)Improve the environment if
	and gas		by means of a	it is found to be
			thermometer, smell	unfavorable.
1. Indoor			check
environment	2)Drop of water or	Occasionally	2)Visual check	2)Check for any trace of
	other liquid			water condensation.
	3)Room temperature	Occasionally	3)Check by means of	3)Max. temperature: 60°C
			a thermometer
				Is something unusual is
				found, open the door and
2. Units and	1)Vibration and noise	Occasionally	Tactile check of the	check the transformer,
				reactors, contactors, relays,
components			cabinet
				cooling fan, etc., inside. If
				necessary, stop the
				operation.
	1)Load current	Occasionally	Moving-iron type AC	To be within the rated
3. Operation			ammeter	current, voltage and
	2)Voltage (*)	Occasionally	Rectifier type AC	temperature.
data
			voltmeter	No significant difference
(output side)
	3) Temperature	Occasionally	Thermometer	from data collected in a
				normal state.
*) The voltage measured may slightly vary from voltmeter to voltmeter. When measuring the voltage,
always take readings from the same circuit tester or voltmeter.

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