Mitsubishi Electric FR-A842-07700, Instruction Manual

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CONTENTS
5
2.11 Installing a communication option 69
3 PRECAUTIONS FOR USE OF THE INVERTER 71
3.1 Electro-magnetic interference (EMI) and leakage currents 72
3.1.1 Leakage currents and countermeasures ........................................................................................................72
3.1.2 Precautions against inverter-generated EMI ..................................................................................................75
3.1.3 Converter unit (FR-CC2) built-in EMC filter ....................................................................................................78
3.2 Power supply harmonics 79
3.2.1 Power supply harmonics.................................................................................................................................79
3.2.2 Harmonic Suppression Guidelines in Japan...................................................................................................80
3.3 Installation of a reactor 82
3.4 Power-OFF and magnetic contactor (MC) 83
3.5 Countermeasures against deterioration of the 400 V class motor insulation 84
3.6 Checklist before starting operation 85
3.7 Failsafe system which uses the inverter 88
4 PROTECTIVE FUNCTIONS 91
4.1 Inverter fault and indications 92
4.2 Reset method for the protective functions 92
4.3 Check and clear of the fault history 93
4.4 List of fault displays 95
5 PRECAUTIONS FOR
MAINTENANCE AND INSPECTION 97
5.1 Inspection item 98
5.1.1 Daily inspection...............................................................................................................................................98
5.1.2 Periodic inspection..........................................................................................................................................98
5.1.3 Daily and periodic inspection ..........................................................................................................................99
5.1.4 Checking the inverter and converter semiconductor devices .......................................................................100
5.1.5 Cleaning........................................................................................................................................................101
5.1.6 Replacement of parts....................................................................................................................................101
5.1.7 Removal and reinstallation of the control circuit terminal block ....................................................................104
5.2 Measurement of main circuit voltages, currents and powers 105
5.2.1 Measurement of powers ...............................................................................................................................107
5.2.2 Measurement of voltages .............................................................................................................................107
5.2.3 Measurement of currents..............................................................................................................................107
5.2.4 Example of measuring converter unit (FR-CC2) input power factor .............................................................107
5.2.5 Measurement of converter output voltage (across terminals P and N).........................................................107