E6580757
14.Inspection and maintenance
Danger
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
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,
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. |
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Subject of | Inspection procedure |
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inspection | Inspection item | Inspection | Inspection method | Criteria for judgement |
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cycle |
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| 1)Dust, temperature | Occasionally | 1)Visual check, check | 1)Improve the environ- |
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| and gas |
| by means of a | ment if it is found to be |
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| thermometer, smell | unfavorable. |
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1. Indoor | 2)Drops of water or | Occasionally | check | 2)Check for any trace of |
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environment | 2)Visual check |
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| other liquid |
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| water condensation. |
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| 3)Room temperature | Occasionally | 3)Check by means of | 3)Max. temperature: 40° C |
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| a thermometer | (50° C inside the cabinet) |
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| If something unusual is |
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| found, open the door and |
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2. Units and | 1)Vibration and noise | Occasionally | Tactile check of the | check the transformer, re- |
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actors, contactors, relays, |
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components | cabinet |
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| cooling fan, etc., inside. If |
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| necessary, stop the opera- |
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| 1)Load current | Occasionally | To be within the rated cur- |
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3. Operation |
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| ammeter | rent, voltage and tem- |
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data (output | 2)Voltage (*) | Occasionally | Rectifier type AC | perature. |
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| voltmeter | No significant difference |
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side) |
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3) Temperature | Occasionally | Thermometer | from data collected in a |
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| normal state. |
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*) The voltage measured may slightly vary from voltmeter to voltmeter. When measuring the voltage, al- |
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ways take readings from the same circuit tester or voltmeter. |
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