Mitsubishi Electric FR-A740-00023 Instruction Manual page 9

4.30 Parameter copy and parameter verification ................................................. 386
4.30.1 Parameter copy .................................................................................................................... 386
4.30.2 Parameter verification........................................................................................................... 387
4.31 Check and clear of the alarm history ............................................................ 388
5 PROTECTIVE FUNCTIONS
5.1 Reset method of protective function ............................................................. 392
5.2 List of alarm display ........................................................................................ 393
5.3 Causes and corrective actions ....................................................................... 394
5.4 Correspondences between digital and actual characters ........................... 407
5.5 Check first when you have troubles .............................................................. 408
5.5.1 Motor will not start ................................................................................................................. 408
5.5.2 Motor generates abnormal noise ........................................................................................... 408
5.5.3 Motor generates heat abnormally .......................................................................................... 409
5.5.4 Motor rotates in opposite direction ........................................................................................ 409
5.5.5 Speed greatly differs from the setting .................................................................................... 409
5.5.6 Acceleration/deceleration is not smooth ................................................................................ 409
5.5.7 Motor current is large............................................................................................................. 409
5.5.8 Speed does not increase....................................................................................................... 409
5.5.9 Speed varies during operation............................................................................................... 410
5.5.10 Operation mode is not changed properly .............................................................................. 410
5.5.11 Operation panel (FR-DU07) display is not operating............................................................. 410
5.5.12 POWER lamp is not lit ........................................................................................................... 410
5.5.13 Parameter write cannot be performed ................................................................................... 410
6 PRECAUTIONS FOR MAINTENANCE AND INSPECTION
6.1 Inspection item................................................................................................. 412
6.1.1 Daily inspection ..................................................................................................................... 412
6.1.2 Periodic inspection ................................................................................................................ 412
6.1.3 Daily and periodic inspection ................................................................................................. 413
6.1.4 Display of the life of the inverter parts ................................................................................... 414
6.1.5 Checking the inverter and converter modules ....................................................................... 414
6.1.6 Cleaning ................................................................................................................................ 415
6.1.7 Replacement of parts ............................................................................................................ 415
6.1.8 Inverter replacement.............................................................................................................. 419
6.2 Measurement of main circuit voltages, currents and powers ..................... 420
6.2.1 Measurement of powers ........................................................................................................ 422
VII
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