Mitsubishi Electric FR-D720-0.1K Instruction Manual page 8

4.21.5 Free parameter (Pr. 888, Pr. 889) ............................................................................................. 235
4.22 Setting the parameter unit and operation panel ........................... 236
4.22.1 RUN key rotation direction selection (Pr. 40) ............................................................................ 236
4.22.2 PU display language selection (Pr.145) .................................................................................... 236
4.22.3 Operation panel frequency setting/key lock selection (Pr. 161) ................................................ 237
4.22.4 Magnitude of frequency change setting (Pr. 295)...................................................................... 239
4.22.5 Buzzer control (Pr. 990)............................................................................................................. 240
4.22.6 PU contrast adjustment (Pr. 991) .............................................................................................. 240
4.23 FR-E500 series operation panel (PA02) setting............................. 241
4.23.1 Built-in potentiometer switching (Pr. 146) .................................................................................. 241
4.23.2 Bias and gain of the built-in frequency setting potentiometer (C22 (Pr. 922) to C25 (Pr. 923)) 242
4.24 Parameter clear/ All parameter clear ............................................ 248
4.25 Initial value change list.................................................................. 249
4.26 Check and clear of the faults history ............................................ 250
5 TROUBLESHOOTING
5.1 Reset method of protective function .............................................. 254
5.2 List of fault or alarm indications..................................................... 255
5.3 Causes and corrective actions ....................................................... 256
5.4 Correspondences between digital and actual characters ............. 265
5.5 Check first when you have a trouble .............................................. 266
5.5.1 Motor does not start.................................................................................................................... 266
5.5.2 Motor or machine is making abnormal acoustic noise................................................................ 268
5.5.3 Inverter generates abnormal noise............................................................................................. 269
5.5.4 Motor generates heat abnormally ............................................................................................... 269
5.5.5 Motor rotates in the opposite direction ....................................................................................... 269
5.5.6 Speed greatly differs from the setting ......................................................................................... 269
5.5.7 Acceleration/deceleration is not smooth ..................................................................................... 270
5.5.8 Speed varies during operation.................................................................................................... 270
5.5.9 Operation mode is not changed properly ................................................................................... 271
5.5.10 Operation panel display is not operating .................................................................................... 271
5.5.11 Motor current is too large............................................................................................................ 271
5.5.12 Speed does not accelerate ......................................................................................................... 272
5.5.13 Unable to write parameter setting............................................................................................... 272
6 PRECAUTIONS FOR MAINTENANCE AND INSPECTION
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