
E6581090
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 |
Mandatory | discovered which could lead to accidents. |
•Before inspection, perform the following steps.
①Shut off all input power to the inverter.
②Wait for at least 15 minutes and check that the charge lamp is no longer lit.
③Use 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.
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
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 |
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| Inspection procedure | Criteria for judgment |
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inspection |
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| Inspection | Inspection method |
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| 1) | Dust, temperature |
| Occasionally | 1) Visual check, check by | 1) Improve the environment if |
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| and gas |
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| means of a thermometer, | it is found to be |
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1. Indoor |
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| smell check | unfavorable. |
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2) | Drops of water or |
| Occasionally | 2) Visual check | 2) Check for any trace of |
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environment |
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| other liquid |
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| water condensation. |
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| 3) | Room |
| Occasionally | 3) Check by means of a | 3) Max. temperature: 40°C |
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| temperature |
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| thermometer | (50°C inside the cabinet) |
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| If something unusual is found, |
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| open the door and check the |
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2. Units and | 1) | Vibration and |
| Occasionally | Tactile check of the cabinet | transformer, reactors, |
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components |
| noise |
| contactors, relays, cooling fan, |
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| etc., inside. If necessary, stop |
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| the operation. |
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| 1) | Load current |
| Occasionally | To be within the rated |
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3. Operation | 2) | Voltage (*) |
| Occasionally | ammeter | current, voltage and |
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data |
| Rectifier type AC voltmeter | temperature. |
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3) | Temperature |
| Occasionally | Thermometer | No significant difference from |
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(output side) |
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| data collected in a normal |
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*) 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