Mitsubishi Electric FR-F720-0.75K to 110K Instruction Manual page 8

4.22.2 Operation panel frequency setting/key lock selection (Pr. 161) ........................................... 248
4.22.3 Buzzer control (Pr. 990)........................................................................................................ 250
4.22.4 PU contrast adjustment (Pr. 991) ......................................................................................... 250
4.23 Parameter clear ............................................................................................... 251
4.24 All parameter clear.......................................................................................... 252
4.25 Parameter copy and parameter verification ................................................. 253
4.25.1 Parameter copy .................................................................................................................... 253
4.25.2 Parameter verification........................................................................................................... 254
4.26 Check and clear of the faults history ............................................................ 255
5 PROTECTIVE FUNCTIONS
5.1 Reset method of protective function ............................................................. 258
5.2 List of fault or alarm display ........................................................................... 259
5.3 Causes and corrective actions ....................................................................... 260
5.4 Correspondences between digital and actual characters ........................... 271
5.5 Check first when you have a trouble ............................................................. 272
5.5.1 Motor does not start............................................................................................................... 272
5.5.2 Motor or machine is making abnormal acoustic noise........................................................... 274
5.5.3 Inverter generates abnormal noise........................................................................................ 274
5.5.4 Motor generates heat abnormally .......................................................................................... 274
5.5.5 Motor rotates in the opposite direction .................................................................................. 275
5.5.6 Speed greatly differs from the setting .................................................................................... 275
5.5.7 Acceleration/deceleration is not smooth ................................................................................ 275
5.5.8 Speed varies during operation............................................................................................... 276
5.5.9 Operation mode is not changed properly .............................................................................. 276
5.5.10 Operation panel (FR-DU07) display is not operating............................................................. 277
5.5.11 Motor current is too large....................................................................................................... 277
5.5.12 Speed does not accelerate .................................................................................................... 278
5.5.13 Unable to write parameter setting.......................................................................................... 278
5.5.14 Power lamp is not lit .............................................................................................................. 278
6 PRECAUTIONS FOR MAINTENANCE AND INSPECTION
6.1 Inspection item................................................................................................. 280
6.1.1 Daily inspection ..................................................................................................................... 280
6.1.2 Periodic inspection ................................................................................................................ 280
6.1.3 Daily and periodic inspection ................................................................................................. 281
6.1.4 Display of the life of the inverter parts ................................................................................... 282
6.1.5 Checking the inverter and converter modules ....................................................................... 282
6.1.6 Cleaning ................................................................................................................................ 283
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