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5.18.2 Droop control (Pr. 286, Pr. 287) ................................................................................................ 173
5.18.3 Regeneration avoidance function (Pr. 665, Pr. 882, Pr. 883, Pr. 885, Pr. 886)......................... 174
5.19 Useful functions ............................................................................. 176
5.19.1 Cooling fan operation selection (Pr. 244) .................................................................................. 176
5.19.2 Display of the life of the inverter parts (Pr. 255 to Pr. 259)........................................................ 177
5.19.3 Maintenance timer alarm (Pr. 503, Pr. 504)............................................................................... 180
5.19.4 Free parameter (Pr. 888, Pr. 889) ............................................................................................. 181
5.20 Setting from the operation panel .................................................. 182
5.20.1 RUN key rotation direction selection (Pr. 40)............................................................................. 182
5.20.2 Operation panel frequency setting/key lock operation selection (Pr. 161)................................. 183
5.20.3 Magnitude of frequency change setting (Pr. 295)...................................................................... 185
5.21 Parameter clear/ All parameter clear............................................ 186
5.22 Initial value change list ................................................................. 187
5.23 Check and clear of the faults history ............................................ 188
6 TROUBLESHOOTING 191
6.1 Reset method of protective function ............................................. 192
6.2 List of fault or alarm indications .................................................... 193
6.3 Causes and corrective actions....................................................... 194
6.4 Correspondences between digital and actual characters ............ 203
6.5 Check first when you have a trouble.............................................. 204
6.5.1 Motor does not start.................................................................................................................... 204
6.5.2 Motor or machine is making abnormal acoustic noise................................................................ 205
6.5.3 Inverter generates abnormal noise............................................................................................. 205
6.5.4 Motor generates heat abnormally............................................................................................... 206
6.5.5 Motor rotates in the opposite direction........................................................................................ 206
6.5.6 Speed greatly differs from the setting......................................................................................... 206
6.5.7 Acceleration/deceleration is not smooth..................................................................................... 206
6.5.8 Speed varies during operation.................................................................................................... 207
6.5.9 Operation mode is not changed properly.................................................................................... 207
6.5.10 Operation panel display is not operating .................................................................................... 207
6.5.11 Motor current is too large............................................................................................................ 208
6.5.12 Speed does not accelerate......................................................................................................... 208
6.5.13 Unable to write parameter setting............................................................................................... 208
6.5.14 Troubleshooting in FL remote communication............................................................................ 209
7 PRECAUTIONS FOR MAINTENANCE AND INSPECTION 211