Mitsubishi Electric FR-A802-P Instruction Manual page 5

3 PRECAUTIONS FOR USE OF THE INVERTER 67
3.1 Electro-magnetic interference (EMI) and leakage currents
3.1.1 Leakage currents and countermeasures........................................................................................................ 68
3.1.2 Countermeasures against inverter-generated EMI ........................................................................................ 71
3.1.3 Converter unit built-in EMC filter .................................................................................................................... 74
3.2 Power supply harmonics
3.2.1 Power supply harmonics ................................................................................................................................ 75
3.2.2 Harmonic Suppression Guidelines in Japan .................................................................................................. 76
3.3 Power-OFF and magnetic contactor (MC)
3.4 Countermeasures against deterioration of the 400 V class motor insulation
3.5 Checklist before starting operation
3.6 Failsafe system which uses the inverter
4 PROTECTIVE FUNCTIONS
4.1 Inverter fault and alarm indications
4.2 Reset method for the protective functions
4.3 Check and clear of the fault history
4.4 List of fault displays
5 PRECAUTIONS FOR
MAINTENANCE AND INSPECTION
5.1 Inspection item
5.1.1 Daily inspection .............................................................................................................................................. 94
5.1.2 Periodic inspection ......................................................................................................................................... 94
5.1.3 Daily and periodic inspection.......................................................................................................................... 95
5.1.4 Checking the inverter and converter semiconductor devices......................................................................... 96
5.1.5 Cleaning ......................................................................................................................................................... 97
5.1.6 Replacement of parts ..................................................................................................................................... 97
5.1.7 Removal and reinstallation of the control circuit terminal block...................................................................... 99
5.2 Measurement of main circuit voltages, currents and powers
5.2.1 Measurement of powers............................................................................................................................... 103
5.2.2 Measurement of voltages ............................................................................................................................. 103
5.2.3 Measurement of currents ............................................................................................................................. 103
5.2.4 Example of measuring converter unit input power factor ............................................................................. 103
5.2.5 Measurement of converter output voltage (across terminals P and N) ........................................................ 103
5.2.6 Measurement of inverter output frequency................................................................................................... 103
5.2.7 Insulation resistance test using megger ....................................................................................................... 104
5.2.8 Pressure test ................................................................................................................................................ 104
4
CONTENTS
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