Inspection and maintenance, Regular inspection

E6580757

14.Inspection and maintenance

Danger

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 for at least ten minutes and check 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-PC) does not exceed 45V.

Performing an inspection without carrying out these steps first could lead to electric shock.

•When using switchgear for the inverter, it must be installed in a cabinet.

Failure to do so can lead to risk of electric shock and can result in death or serious injury.

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
inspection	Inspection item	Inspection	Inspection method	Criteria for judgement
inspection	Inspection item	cycle	Inspection method
		cycle
	1)Dust, temperature	Occasionally	1)Visual check, check	1)Improve the environ-
	and gas		by means of a	ment if it is found to be
			thermometer, smell	unfavorable.
1. Indoor	2)Drops of water or	Occasionally	check	2)Check for any trace of
environment	2)Drops 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: 40° C
			a thermometer	(50° C inside the cabinet)
				If something unusual is
				found, open the door and
2. Units and	1)Vibration and noise	Occasionally	Tactile check of the	check the transformer, re-
2. Units and			Tactile check of the	actors, contactors, relays,
components			cabinet	actors, contactors, relays,
components			cabinet	cooling fan, etc., inside. If
				cooling fan, etc., inside. If
				necessary, stop the opera-
				tion.
				tion.	14
	1)Load current	Occasionally	Moving-iron type AC	To be within the rated cur-
3. Operation			ammeter	rent, voltage and tem-
data (output	2)Voltage (*)	Occasionally	Rectifier type AC	perature.
data (output			voltmeter	No significant difference
side)			voltmeter	No significant difference
side)	3) Temperature	Occasionally	Thermometer	from data collected in a
	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, al-
ways take readings from the same circuit tester or voltmeter.

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