Toshiba VF-AS1 instruction manual Regular inspection, Check points

! E6581301!

14.Inspection and maintenance

Warning

Mandatory

•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.

(2)Wait at least 15 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 (between 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.

14.1Regular inspection

Electronic parts are easily affected by heat. Install the Inverter in a cool, well-ventilated, dust-free area for achieving

the original performance for a prolonged amount of time in demonstrate its original performance for a long time.

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
inspection		Inspection item	Inspection	Inspection method	Criteria for judgment
			cycle
	1)	Dust, temperature	Occasionally	1) Visual check,	1) Improve bad points.
		and gas		check by means of	2) Check for any trace of water
1.Indoor	2)	Drooping of water	Occasionally	a thermometer,	condensation.
		and other liquid		smell check	3) Max. temperature:60°C
environment
	3)	Room temperature		2) Visual check
			Occasionally
				3) Check by means of
				a thermometer
	1)	Vibration and noise	Occasionally	Tactile check of the	Is something unusual is found,
2.Component				cabinet	open the door and check the
					transformer, reactors,
parts and
					contactors, relays, cooling fan,
units
					etc., inside. If necessary, stop
					the operation.
	1)	Load current	Occasionally	Moving-iron type AC	To be within the rated current,
3.Operation				ammeter	voltage and temperature.
data	2)	Voltage (*)	Occasionally	Rectifier type AC	No significant difference from
(output side)				voltmeter	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.

■Check points

1.Something unusual in the installation environment

2.Something unusual in the cooling system

3.Unusual vibration or noise

4.Overheating or discoloration

5.Unusual odor

6.Unusual motor vibration, noise or overheating

7.Adhesion or accumulation of foreign substances (conductive substances)

■Cautions about cleaning

To clean the inverter, wipe dirt off only its surface with a soft cloth but do not try to remove dirt or stains from any
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other part. If stubborn stains persist, remove them by wiping gently with a cloth dampened with neutral detergent or
ethanol.
Never use any of the chemicals in the table below; the use of any of them may damage or peel the coating away from
molded parts (such as plastic covers and units) of the inverter.
Acetone	Ethylene chloride	Tetrachloroethane
Benzen	Ethyl acetate	Trichloroethylene
Chloroform	Glycerin	Xylene

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