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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 | ||
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| DC main circuits (across PA/+ and | |
| 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,
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 |
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| 1)Dust, temperature | Occasionally | 1)Visual check, check | 1)Improve the environment if | |
| and gas |
| by means of a | it is found to be | |
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| thermometer, smell | unfavorable. | |
1. Indoor |
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| check |
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environment | 2)Drop of water or | Occasionally | 2)Visual check | 2)Check for any trace of | |
| other liquid |
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| water condensation. | |
| 3)Room temperature | Occasionally | 3)Check by means of | 3)Max. temperature: 60°C | |
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| a thermometer | ||
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| Is something unusual is | |
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| 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 | ||||
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| cooling fan, etc., inside. If | |||
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| necessary, stop the | |
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| operation. | |
| 1)Load current | Occasionally | To be within the rated | ||
3. Operation |
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| ammeter | current, voltage and | |
2)Voltage (*) | Occasionally | Rectifier type AC | temperature. | ||
data | |||||
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| voltmeter | No significant difference | ||
(output side) |
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3) Temperature | Occasionally | Thermometer | from data collected in a | ||
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| 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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