Goodrive270 series VFD for fan and pump Contents
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7.5.1 Faults and solutions .............................................................................................. 240
7.5.2 Other status .......................................................................................................... 247
7.6 Analysis on common faults .............................................................................................. 248
7.6.1 Motor fails to work ................................................................................................. 248
7.6.2 Motor vibrates ....................................................................................................... 249
7.6.3 Overvoltage........................................................................................................... 250
7.6.4 Undervoltage ......................................................................................................... 251
7.6.5 Motor overheating ................................................................................................. 252
7.6.6 VFD overheating ................................................................................................... 253
7.6.7 Motor stalls during ACC ......................................................................................... 254
7.6.8 Overcurrent ........................................................................................................... 255
7.7 Countermeasures on common interference ..................................................................... 255
7.7.1 Interference on meter switches and sensors .......................................................... 255
7.7.2 Interference on RS485 communication .................................................................. 257
7.7.3 Failure to stop and indicator shimmering due to motor cable coupling .................... 258
7.7.4 Leakage current and interference on RCD ............................................................. 258
7.7.5 Live device chassis ............................................................................................... 259
8 Maintenance ............................................................................................................................ 260
8.1 What this chapter contains .............................................................................................. 260
8.2 Periodical inspection ....................................................................................................... 260
8.3 Cooling fan...................................................................................................................... 263
8.4 Capacitor ........................................................................................................................ 264
8.4.1 Capacitor reforming ............................................................................................... 264
8.4.2 Electrolytic capacitor replacement ......................................................................... 265
8.5 Power cable .................................................................................................................... 265
9 Communication ....................................................................................................................... 266
9.1 What this chapter contains .............................................................................................. 266
9.2 Modbus protocol introduction .......................................................................................... 266
9.3 Application of Modbus ..................................................................................................... 266
9.3.1 RS485 ................................................................................................................... 266
9.3.2 RTU mode............................................................................................................. 269
9.4 RTU command code and communication data................................................................. 272
9.4.1 Command code 03H, reading N words (continuously up to 16 words) .................... 272
9.4.2 Command code 06H, writing a word ...................................................................... 274
9.4.3 Command code 08H, diagnosis ............................................................................. 275
9.4.4 Command code 10H, continuous writing ................................................................ 276
9.4.5 Data address definition .......................................................................................... 277
9.4.6 Fieldbus scale ....................................................................................................... 281
9.4.7 Error message response ....................................................................................... 282
9.4.8 Read/Write operation examples ............................................................................. 283
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