Mitsubishi Electric FR-E720-600 Instruction Manual page 9

4.22.1 Cooling fan operation selection (Pr. 244) .................................................................................. 250
4.22.2 Display of the life of the inverter parts (Pr. 255 to Pr. 259)........................................................ 251
4.22.3 Maintenance timer alarm (Pr. 503, Pr. 504)............................................................................... 255
4.22.4 Current average value monitor signal (Pr. 555 to Pr. 557) ........................................................ 256
4.22.5 Free parameter (Pr. 888, Pr. 889) ............................................................................................. 258
4.23 Setting from the parameter unit and operation panel .................. 259
4.23.1 RUN key rotation direction selection (Pr. 40)............................................................................. 259
4.23.2 PU display language selection(Pr.145)...................................................................................... 259
4.23.3 Operation panel frequency setting/key lock operation selection (Pr. 161)................................. 260
4.23.4 Magnitude of frequency change setting (Pr. 295)...................................................................... 262
4.23.5 Buzzer control (Pr. 990)............................................................................................................. 263
4.23.6 PU contrast adjustment (Pr. 991) .............................................................................................. 263
4.24 Parameter clear/ All parameter clear ............................................ 264
4.25 Initial value change list ................................................................. 265
4.26 Check and clear of the faults history ............................................ 266
5 TROUBLESHOOTING
5.1 Reset method of protective function.............................................. 270
5.2 List of fault or alarm indications .................................................... 271
5.3 Causes and corrective actions ....................................................... 272
5.4 Correspondences between digital and actual characters............. 280
5.5 Check first when you have some troubles ..................................... 281
5.5.1 Motor will not start....................................................................................................................... 281
5.5.2 Motor generates abnormal noise ................................................................................................ 281
5.5.3 Motor generates heat abnormally ............................................................................................... 282
5.5.4 Motor rotates in opposite direction.............................................................................................. 282
5.5.5 Speed greatly differs from the setting ......................................................................................... 282
5.5.6 Acceleration/deceleration is not smooth ..................................................................................... 282
5.5.7 Motor current is large.................................................................................................................. 282
5.5.8 Speed does not increase ............................................................................................................ 282
5.5.9 Speed varies during operation.................................................................................................... 283
5.5.10 Operation mode is not changed properly.................................................................................... 283
5.5.11 Operation panel display is not operating .................................................................................... 283
5.5.12 Parameter write cannot be performed ........................................................................................ 283
6 PRECAUTIONS FOR MAINTENANCE AND INSPECTION
6.1 Inspection items ............................................................................. 286
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