Mitsubishi Electronics FR-A700 ユーザーズマニュアル

VII

CONT

ENTS

4.30 Check and clear of the faults history ............................................................ 399

5 PROTECTIVE FUNCTIONS

401

5.1

Reset method of protective function ............................................................. 402

5.2

List of fault or alarm display ........................................................................... 403

5.3

Causes and corrective actions ....................................................................... 404

5.4

Correspondences between digital and actual characters ........................... 418

5.5

Check first when you have a trouble ............................................................. 419

Motor does not start............................................................................................................... 419

Motor or machine is making abnormal acoustic noise........................................................... 421

Inverter generates abnormal noise........................................................................................ 421

Motor generates heat abnormally.......................................................................................... 421

Motor rotates in the opposite direction .................................................................................. 422

Speed greatly differs from the setting.................................................................................... 422

Acceleration/deceleration is not smooth................................................................................ 422

Speed varies during operation............................................................................................... 423

Operation mode is not changed properly .............................................................................. 424

5.5.10 Operation panel (FR-DU07) display is not operating............................................................. 424

5.5.11 Motor current is too large....................................................................................................... 424

5.5.12 Speed does not accelerate.................................................................................................... 425

5.5.13 Unable to write parameter setting.......................................................................................... 425

5.5.14 Power lamp is not lit .............................................................................................................. 425

6 PRECAUTIONS FOR MAINTENANCE AND INSPECTION

427

6.1

Inspection item................................................................................................. 428

Daily inspection ..................................................................................................................... 428

Periodic inspection ................................................................................................................ 428

Daily and periodic inspection................................................................................................. 429

Display of the life of the inverter parts ................................................................................... 430

Checking the inverter and converter modules ....................................................................... 430

Cleaning ................................................................................................................................ 430

Replacement of parts ............................................................................................................ 431

Inverter replacement.............................................................................................................. 434

6.2

Measurement of main circuit voltages, currents and powers ..................... 435

Measurement of powers ........................................................................................................ 437

Measurement of voltages and use of PT ............................................................................... 437

Measurement of currents....................................................................................................... 438

Use of CT and transducer ..................................................................................................... 438