Download  Print this page

Mitsubishi Electric FR-A700 Instruction Manual Page 414

Fr-a700 series to 03460-na/09620-na/00330-n4/00170-n4.
Hide thumbs
   
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482

Advertisement

Causes and corrective actions
(4) Major fault
When the protective function is activated, the inverter output is shut off and an alarm is output.
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
404
E.OC1
Overcurrent shut-off during acceleration
When the inverter output current reaches or exceeds approximately 220% of the rated current during
acceleration, the protective circuit is activated to stop the inverter output.
1. Check for sudden acceleration.
2. Check that the downward acceleration time is not long in vertical lift application.
3. Check for output short circuit.
4. Check that the Pr. 3 Base frequency setting is not 60Hz when the motor rated frequency is 50Hz.
5. Check that stall prevention operation is correct.
6. Check that the regeneration is not performed frequently. (Check that the output voltage becomes
larger than the V/F reference voltage at regeneration and overcurrent due to increase in motor
current occurs.)
7. Check that the power supply for RS-485 terminal is not shorted. (under vector control)
8. Check that the rotation direction is not switched from forward to reverse rotation (or from reverse to
forward) during torque control under real sensorless vector control.
1. Increase the acceleration time.
(Shorten the downward acceleration time in vertical lift application.)
2. When "E.OC1" is always lit at starting, disconnect the motor once and start the inverter.
If "E.OC1" is still lit, contact your sales representative.
3. Check the wiring to make sure that output short circuit does not occur.
4. Set the Pr. 3 Base frequency to 50Hz. (Refer to page 159.)
5. Perform a correct stall prevention operation. (Refer to page 150.)
6. Set base voltage (rated voltage of the motor, etc.) in Pr. 19 Base frequency voltage. (Refer to page 159.)
7. Check RS-485 terminal connection. (under vector control)
8. Prevent the motor from switching the rotation direction from forward to reverse (or from reverse to
forward) during torque control under real sensorless vector control.
E.OC2
Overcurrent shut-off during constant speed
When the inverter output current reaches or exceeds approximately 220% of the rated current during
constant speed operation, the protective circuit is activated to stop the inverter output.
1. Check for sudden load change.
2. Check for output short circuit.
3. Check that stall prevention operation is correct
4. Check that the power supply for RS-485 terminal is not shorted. (under vector control)
5. Check that the rotation direction is not switched from forward to reverse rotation (or from reverse to
forward) during torque control under real sensorless vector control.
1. Keep load stable.
2. Check the wiring to make sure that output short circuit does not occur.
3. Check that stall prevention operation setting is correct. (Refer to page 150.)
4. Check RS-485 terminal connection. (under vector control)
5. Prevent the motor from switching the rotation direction from forward to reverse (or from reverse to
forward) during torque control under real sensorless vector control.
E.OC3
Overcurrent shut-off during deceleration or stop
When the inverter output current reaches or exceeds approximately 220% of the rated inverter current
during deceleration (other than acceleration or constant speed), the protective circuit is activated to
stop the inverter output.
1. Check for sudden speed reduction.
2. Check for output short circuit.
3. Check for too fast operation of the motor's mechanical brake.
4. Check that stall prevention operation setting is correct.
5. Check that the power supply for RS-485 terminal is not shorted. (under vector control)
6. Check that the rotation direction is not switched from forward to reverse rotation (or from reverse to
forward) during torque control under real sensorless vector control.
1. Increase the deceleration time.
2. Check the wiring to make sure that output short circuit does not occur.
3. Check the mechanical brake operation.
4. Check that stall prevention operation setting is correct.(Refer to page 150.)
5. Check RS-485 terminal connection. (under vector control)
6. Prevent the motor from switching the rotation direction from forward to reverse (or from reverse to
forward) during torque control under real sensorless vector control.
FR-PU04
OC During Accs
FR-PU07
FR-PU04
Stedy Spd OC
FR-PU07
FR-PU04
OC During Dec
FR-PU07

Advertisement

Table of Contents

   Related Manuals for Mitsubishi Electric FR-A700

This manual is also suitable for:

Fr-a720-00030Fr-a740-00015

Comments to this Manuals

Symbols: 0
Latest comments: