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Wiki source code of 3.4 Protections

Version 5.1 by Admin on 2025/02/26 12:02
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Admin 1.1 1 (% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 = Settings =
3
4 (% data-numbered-headings-start="4" style="--numbered-headings-start: 3;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 == Protections ==
6
7 The BMS Mini device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
8
Admin 1.5 9 (% class="box errormessage" %)
10 (((
11 **Attention!**
12 Behavior of contactors at different errors is configured in **corresponding contactor settings**!
13 )))
14
Admin 1.1 15 === Overcurrent ===
16
17 The BMS Mini device performs the overcurrent protection depending on current sensor values.
18
19 To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
20
21 [[image:1733748033234-868.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
22
23 In this section:
24
25 * Enable – a flag to enable the protection;
26 * Maximum charging current, А;
27 * Tolerant charging current, А;
28 * Maximum discharging current, А;
29 * Tolerant discharging current, А;
30 * Delay before setting the error, millisecond;
31 * Delay before clearing the error, second;
32 * Lock – a flag to block the error until the device is restarted.
33
34 As a result of operation of the overcurrent protection, the "Overcurrent" error is generated.
35
36 Error generation conditions:
37
38 * the current is positive (charging), and its modulo value is greater than the “Maximum charging current” value for the “Delay before setting the error” time;
39 * the current is negative (discharging), and its modulo value is greater than the “Maximum discharging current” value for the “Delay before setting the error” time.
40
41 Conditions for removing the error:
42
43 * the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
44 * the current is negative (discharging), and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
45
Admin 2.2 46 === Charge current limit ===
47
Admin 3.2 48 The BMS Mini device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Mini S.3\. Configuration.3\.3 Control.WebHome||anchor="HChargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
Admin 2.2 49
50 Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
51
52 To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
53
Admin 3.2 54 [[image:1740571132019-848.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
Admin 2.2 55
56 In this section:
57
58 * Enable – a flag to enable the protection;
59 * Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
Admin 3.2 60 * Region 1: Current difference – a value of maximum absolute current difference, A;
Admin 2.2 61 * Region 2: Current difference – a value of maximum relative current excess, A;
62 * Delay before setting the error, millisecond;
63 * Delay before clearing the error, second;
64 * Lock – a flag to block the error until the device is restarted.
65
Admin 4.2 66 === Discharge current limit ===
67
68 The BMS Mini device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Mini S.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
69
70 Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
71
72 To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
73
74 [[image:1740571296344-411.png]]
75
Admin 1.1 76 === Undervoltage ===
77
78 The BMS Mini device implements battery protection from too low voltage on the cells.
79
80 To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
81
82 [[image:1733748033237-837.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="127" width="800"]]
83
84 In this section:
85
86 * Enable – a flag to enable the protection;
87 * Minimum cell voltage, V;
88 * Tolerant cell voltage, V;
89 * Delay before setting the error, millisecond;
90 * Delay before clearing the error, second;
91 * Lock – a flag to block the error until the device is restarted.
92
93 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
94
95 Error generation conditions:
96
97 * the minimum voltage among all cells of the battery is less than the “Minimum cell voltage” value for the “Delay before setting the error” time.
98
99 Conditions for removing the error:
100
101 * the minimum voltage among all cells of the battery is greater than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
102
103 === Overvoltage ===
104
105 The BMS Mini device implements battery protection from too high voltage on the cells.
106
107 To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
108
109 [[image:1733748033238-995.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
110
111 In this section:
112
113 * Enable – a flag to enable the protection;
114 * Maximum cell voltage, V;
115 * Tolerant cell voltage, V;
116 * Delay before setting the error, millisecond;
117 * Delay before clearing the error, second;
118 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Overvoltage" error is generated;
119 * Lock – a flag to block the error until the device is restarted.
120
121 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
122
123 Error generation conditions:
124
125 * the maximum voltage among all cells of the battery is greater than the “Maximum cell voltage” value for the “Delay before setting the error” time.
126
127 Conditions for removing the error:
128
129 * the maximum voltage among all cells of the battery is less than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
130
131 === Low temperature ===
132
133 The BMS Mini device implements battery protection from too low temperature.
134
135 To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
136
137 [[image:1733748045675-570.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
138
139 In this section:
140
141 * Enable – a flag to enable the protection;
142 * Minimum charge temperature, °C;
143 * Tolerant charge temperature, °C;
144 * Minimum discharge temperature, °C;
145 * Tolerant discharge temperature, °C;
146 * Delay before setting the error, millisecond;
147 * Delay before clearing the error, second;
148 * Lock – a flag to block the error until the device is restarted.
149
150 As a result of the operation of the battery protection from low temperature, the "Low temperature (CH)" and/or “Low temperature (DCH)” error are generated.
151
152 Error generation conditions:
153
154 * the minimum temperature among all cells of the battery is less than the “Minimum charging (discharging) temperature” value for the “Delay before setting the error” time.
155
156 Conditions for removing the error:
157
158 * the minimum temperature among all cells of the battery is greater than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
159
160 === High temperature ===
161
162 The BMS Mini device implements battery protection from too high temperature.
163
164 To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
165
166 [[image:1733748045683-426.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
167
168 In this section:
169
170 * Enable – a flag to enable the protection;
171 * Maximum charge temperature, °C;
172 * Tolerant charge temperature, °C;
173 * Maximum discharge temperature, °C;
174 * Tolerant discharge temperature, °C;
175 * Delay before setting the error, millisecond;
176 * Delay before clearing the error, second;
177 * Lock – a flag to block the error until the device is restarted.
178
179 As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
180
181 Error generation conditions:
182
183 * the maximum temperature among all cells of the battery is greater than the “Maximum charging (discharging) temperature” value for the “Delay before setting the error” time.
184
185 Conditions for removing the error:
186
187 * the maximum temperature among all cells of the battery is less than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
188
189 === Battery cover ===
190
191 To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
192
193 [[image:1733748045685-763.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="92" width="800"]]
194
195 In this section:
196
197 * Enable – a flag to enable the protection;
198 * Delay before setting the error, millisecond;
199 * Delay before clearing the error, second;
200 * Lock – a flag to block the error until the device is restarted.
201
202 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
203
204 Error generation conditions:
205
206 * there is a signal from the battery cover during the “Delay before setting the error” time.
207
208 Conditions for removing the error:
209
210 * no signal from the battery cover during the “Delay before clearing the error” time.
211
212 (% class="box warningmessage" %)
213 (((
Admin 1.6 214 If there is the "Battery cover error", the **“Critical error” **is generated.
Admin 1.1 215 )))
216
217 === Cell monitor offline ===
218
219 The BMS Mini device checks if there is connection with cell monitor and set an error if not.
220
221 To change the cell monitor offline protection parameters, select the "Protections → Cell monitor offline" section:
222
223 [[image:1733748045686-719.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="93" width="800"]]
224
225 In this section:
226
227 * Enable – a flag to enable the protection;
228 * Lock – a flag to block the error until the device is restarted.
229
230 As a result of the operation of the protection from the cell monitor offline, the "Cell monitor offline error" is generated.
231
232 Error generation conditions:
233
234 * there is not connection with the cell monitor.
235
236 Conditions for removing the error:
237
238 * connection with the cell monitor is established.
239
240 (% class="box warningmessage" %)
241 (((
Admin 1.7 242 If there is the " Cell monitor offline error", the **“Critical error” **is generated.
Admin 1.1 243 )))
244
245 === Cell count ===
246
247 To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
248
249 [[image:1733748057078-555.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="103" width="800"]]
250
251 In this section:
252
253 * Enable – a flag to enable the protection;
254 * Number of cells – a number of cells connected to the BMS;
255 * Delay before setting the error, millisecond;
256 * Delay before clearing the error, second;
257 * Lock – a flag to block the error until the device is restarted.
258
259 As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
260
261 Error generation conditions:
262
263 * the number of cells connected to the BMS is **not equal** to the “Number of cells” value during the “Delay before setting the error” time.
264
265 Conditions for removing the error:
266
267 * the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
268
269 (% class="box warningmessage" %)
270 (((
Admin 1.7 271 If there is the "Cell count error", the **“Critical error” **is generated.
Admin 1.1 272 )))
273
274 === Short circuit ===
275
276 The BMS Mini device implements a protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
277
278 To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
279
280 [[image:1733748057080-806.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="213" width="800"]]
281
282 In this section:
283
284 * Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
285 ** Enable – a flag to enable the protection;
286 ** Maximum current, A;
287 ** Delay before setting the error, second;
288 * Switch off the charging contactor on error – a flag to open the charging contactor when the "Short circuit" error occurs;
289 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Short circuit" error occurs;
290 * Delay before clearing the error, second;
291 * Lock – a flag to block the error until the device is restarted.
292
293 If there is a short circuit, the "Short circuit" error is generated.
294
295 Error generation conditions:
296
297 * at any of the three protection levels, the current modulo is greater than the “Maximum current” value during the “Delay before setting the error” time.
298
299 Conditions for removing the error:
300
301 * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
302
303 === High contactor temperature ===
304
305 The BMS Mini device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X6 connector is used.
306
307 To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
308
309 [[image:1733748057082-234.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="183" width="800"]]
310
311 In this section:
312
313 * Enable – a flag to enable the protection;
314 * Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
315 * Maximum contactor temperature, °C;
316 * Tolerant contactor temperature, °C;
317 * Delay before setting the error, second;
318 * Switch off the charging contactor on error – a flag to open the charging contactor when the "High contactor temperature" error occurs;
319 * Switch off the discharging contactor on error – a flag to open the discharging contactor when the "High contactor temperature" error occurs;
320 * Delay before clearing the error, second;
321 * Lock – a flag to block the error until the device is restarted.
322
323 If there is a contactor overheat, the "High contactor temperature" error is generated.
324
325 Error generation conditions:
326
327 * the contactor temperature is greater than the “Maximum temperature” value during the “Delay before setting the error” time.
328
329 Conditions for removing the error:
330
331 * the contactor temperature is lower than the “Tolerant temperature” value during the “Delay before clearing the error” time.
332
333 If there is the "High contactor temperature" error, the **charging **contactor opens (the “Switch off the charging contactor on error” flag is set) and the **discharging **contactor opens (the “Switch off the discharging contactor on error” flag is set).
334
335 === Current sensor ===
336
337 The BMS Mini device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
338
339 To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
340
341 [[image:1733748057083-985.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="139" width="800"]]
342
343 In this section:
344
345 * Enable – a flag to enable the protection;
346 * Maximum voltage, V;
347 * Minimum voltage, V;
348 * Voltage hysteresis – a hysteresis value to clear the error, V;
349 * Delay before setting the error, second;
350 * Delay before clearing the error, second;
351 * Lock – a flag to block the error until the device is restarted.
352
353 If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
354
355 Error generation conditions:
356
357 * the voltage in the signal line or zero level line of the current sensor is greater than the “Maximum voltage” value during the “Delay before setting the error” time;
358 * the voltage in the signal line or zero level line of the current sensor is less than the “Minimum voltage” value during the “Delay before setting the error” time.
359
360 Conditions for removing the error:
361
362 * the voltage in the signal line or zero level line of the current sensor is in range from (Minimum voltage + Voltage hysteresis) to (Maximum voltage - Voltage hysteresis) during the “Delay before clearing the error” time.
363
364 (% class="box warningmessage" %)
365 (((
Admin 1.7 366 If there is the “Current sensor error”, the **“Critical error” **is generated.
Admin 1.1 367 )))
368
369 === Charge contactor cycles ===
370
371 The BMS Mini device protects the charging contactor against frequent switching.
372
373 To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
374
375 [[image:1733748068419-377.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="140" width="800"]]
376
377 In this section:
378
379 * Enable – a flag to enable the protection;
380 * Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
381 * Check time – a time in which the BMS counts switchings of the charging contactor, second;
382 * Delay before setting the error, millisecond;
383 * Delay before clearing the error, second;
384 * Lock – a flag to block the error until the device is restarted.
385 * Number of cycles – a number of the charging contactor switchings made during battery operation.
386
387 If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
388
389 Error generation conditions:
390
391 * the number of switchings of the charging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
392
393 Conditions for removing the error:
394
395 * the “Delay before clearing the error” time has passed since the error was generated.
396
397 === Discharge contactor cycles protection ===
398
399 The BMS Mini device protects the discharging contactor against frequent switching.
400
401 To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
402
403 [[image:1733748068420-615.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="139" width="800"]]
404
405 In this section:
406
407 * Enable – a flag to enable the protection;
408 * Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
409 * Check time – a time in which the BMS counts switchings of the charging contactor, second;
410 * Delay before setting the error, millisecond;
411 * Delay before clearing the error, second;
412 * Lock – a flag to block the error until the device is restarted.
413 * Number of cycles – a number of the charging contactor switchings made during battery operation.
414
415 If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
416
417 Error generation conditions:
418
419 * the number of switchings of the discharging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
420
421 Conditions for removing the error:
422
423 * the “Delay before clearing the error” time has passed since the error was generated.
424
425 === Temperature sensors ===
426
427 The BMS Mini device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
428
429 To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
430
431 [[image:1733748068421-819.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="115" width="800"]]
432
433 In this section:
434
435 * Enable – a flag to enable the protection;
436 * Delay before setting the error, millisecond;
437 * Delay before clearing the error, second;
438 * Lock – a flag to block the error until the device is restarted.
439
440 If there are no temperature sensors connected to the BMS Mini or any temperature sensor is shorted, the "No temp. sensors" error and "Temp. sensor is shorted" error are generated respectively. These errors generated and removed with the “Delay before setting the error” and “Delay before clearing the error” delays.
441
442 (% class="box warningmessage" %)
443 (((
Admin 1.8 444 If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated.
Admin 1.1 445 )))
446
447 === WDT reset ===
448
449 If the BMS firmware hangs, the watchdog timer resets the device. The BMS can detect that the device was reset and generates the “WDT reset” error.
450
451 To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
452
453 [[image:1733748068422-188.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
454
455 In this section:
456
457 * Enable – a flag to enable the protection;
458 * Delay before clearing the error, second;
459 * Lock – a flag to block the error until the device is restarted.
460
461 Conditions for removing the error:
462
463 * the “Delay before clearing the error” time has passed from the device startup.
464
465 (% class="box warningmessage" %)
466 (((
Admin 1.8 467 If there is the "WDT reset" error, the **“Critical error” **is generated.
Admin 1.1 468 )))
469
470 === Unallowable charging ===
471
472 The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
473
474 To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
475
476 [[image:1733748083466-209.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
477
478 In this section:
479
480 * Enable – a flag to enable the protection;
481 * Delay before setting the error, second;
482 * Delay before clearing the error, second;
483 * Lock – a flag to block the error until the device is restarted.
484
485 If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
486
487 Error generation conditions:
488
489 * the charging contactor is open and the battery current is not zero during the “Delay before setting the error” time.
490
491 Conditions for removing the error:
492
493 * the battery current is zero during the “Delay before clearing the error” time.
494
495 === Stuck contactor ===
496
497 The BMS Mini device protects contactors against sticking.
498
499 To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
500
501 [[image:1733748083467-352.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
502
503 In this section:
504
505 * Enable – a flag to enable the protection;
506 * Delay before setting the error, millisecond;
507 * Delay before clearing the error, second;
508 * Lock – a flag to block the error until the device is restarted.
509
Admin 1.8 510 If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
Admin 1.1 511
512 * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
513
514 === Contactor feedback ===
515
516 The BMS Mini device can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, the feedback signal must be connected to corresponding contactor feedback pin on X1 header.
517
518 To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
519
520 [[image:1733748083468-378.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
521
522 In this section:
523
524 * Enable – a flag to enable the protection;
525 * Delay before setting the error, millisecond;
526 * Delay before clearing the error, second;
527 * Lock – a flag to block the error until the device is restarted.
528
529 If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
530
531 * a command for charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
532
533 === Insulation ===
534
535 The BMS Mini device can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
536
537 To change the insulation monitoring parameters, select the "Protections → Insulation" section:
538
539 [[image:1733748083469-478.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
540
541 In this section:
542
543 * Enable – a flag to enable the protection;
544 * Delay before setting the error, second;
545 * Delay before clearing the error, second;
546 * Lock – a flag to block the error until the device is restarted.
547
548 Error is set if corresponding discrete input is set up and it receives logical zero.
549
550 === Critical error ===
551
552 To change the critical error parameters, select the "Protections → Critical error" section:
553
554 [[image:1733748083469-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
555
556 In this section:
557
558 * Enable – a flag to enable the protection;
559 * Delay before setting the error, millisecond;
560 * Delay before clearing the error, second;
561 * Lock – a flag to block the error until the device is restarted.
562
563 The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
564
565 * “Battery cover error”;
566 * “Cell monitor offline”;
567 * “Cell count error”;
568 * “ADC error”;
569 * “Current sensor error”;
570 * “Shunt offline”;
571 * “Shunt error”;
572 * “No temp. sensors”;
573 * “Temp. sensor is shorted”;
574 * “Settings error”;
575 * “WDT reset”;
576 * “Stuck contactor”;
577 * “Contactor feedback error”;
578 * “Insulation fault”.
579
580 The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.