MITSUBISHI ELECTRIC FR-S520 - Manual (Page 9)

IV
3. PROTECTIVE FUNCTIONS 136
3.1 Errors (Alarms) .....................................................................................137
3.1.1 Error (alarm) definitions.......................................................................... 137
3.1.2 To know the operating status at the occurrence of alarm
(Only when FR-PU04 is used)............................................................... 145
3.1.3 Correspondence between digital and actual characters...................... 145
3.1.4 Resetting the inverter ............................................................................. 145
3.2 Troubleshooting....................................................................................146
3.2.1 Motor remains stopped .......................................................................... 146
3.2.2 Motor rotates in opposite direction ........................................................ 147
3.2.3 Speed greatly differs from the setting.................................................... 147
3.2.4 Acceleration/deceleration is not smooth ............................................... 147
3.2.5 Motor current is large.............................................................................. 147
3.2.6 Speed does not increase ....................................................................... 147
3.2.7 Speed varies during operation............................................................... 147
3.2.8 Operation mode is not changed properly.............................................. 148
3.2.9 Operation panel display is not operating............................................... 148
3.2.10 Parameter write cannot be performed ................................................ 148
3.2.11 Motor produces annoying sound......................................................... 148
3.3 Precautions for Maintenance and Inspection .......................................149
3.3.1 Precautions for maintenance and inspection........................................ 149
3.3.2 Check items ............................................................................................ 149
3.3.3 Periodic inspection.................................................................................. 149
3.3.4 Insulation resistance test using megger................................................ 150
3.3.5 Pressure test ........................................................................................... 150
3.3.6 Daily and periodic inspection ................................................................. 150
3.3.7 Replacement of parts ............................................................................. 154
3.3.8 Measurement of main circuit voltages, currents and powers .............. 157
4. SPECIFICATIONS 160
4.1 Specification List ..................................................................................161
4.1.1 Ratings .................................................................................................... 161
4.1.2 Common specifications .......................................................................... 165
4.2 Outline Drawings ..................................................................................167
5. INSTRUCTIONS 170
5.1 Selecting Instructions ...........................................................................171
5.2 Peripheral Selecting Instructions..........................................................171
5.3 Operating Instructions ..........................................................................173
5.4 Inverter-driven 400V class motor .........................................................175
APPENDIX 176
APPENDIX 1 PARAMETER DATA CODE LIST ........................................177