Ну я конечно не про как вы который не дай что то случится сразу к специалисту бегать,
Скажу честно пол дня в серьез возился.
Выяснил в интернете от чего поднимается напряжения на шине постоянного тока.
Как я понял всё это от рекуперации. Построенные по классической схеме устройства на такое просто не рассчитаны: энергия проходит через инвертор, который начинает играть роль своеобразного бустера, что приводит к росту напряжения на шине постоянного тока. Практически ни один современный ИБП не способен полностью справиться с этой проблемой, после срабатывания защиты он перейдет в режим байпаса. On-line UPS ов появляется ошибка DC Bus Fault!!!
Вот я подумал проблема в инверторе DC-DC. Посмотрел осциллографом на затворе транзистора. Вот и выяснил от чего перегрев транзистора. Оно возникло из-за большого времени переключения импульсов (завалены фронты). Этот импульс от микросхемы uc3845 который являются самыми распространенными в импульсных блоках питания бытовой и компьютерной техники. Купил микросхему и за одно его кулер конденсатор 102 1Кв для замены одного из подозрительных и заменил их.
Спасибо Краб Обойдусь Без Твоей тех поддержкой МАНУАЛОВ ПО РЕМОНТУ для КЛИЕНТА и почитать успею но не УМНЫХ КНИГ а то не хочется стать таким умным как ты
Сукханов вам тоже спасибо за совет который аналогично с Крабом
Но не помешало бы нормальных советов я не знаю как у вас но добрым людям я всегда искренне помогу чем смогу в теме
Всё заработало с первого включения транзистор уже не так уж греется ошибка пропало а кстати дисплей заработал раньше, дело было в разъема шлейфа видимо контакт бы плохим.
Изменено 8 августа, 2019 пользователем Sherzod J
Нечего
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Table 1. Configuration Mode Parameters (cont.)
Parameter
Manual Battery Test
Manual UPS Test
Site Wiring Fault Alarm
Modem Support
Number of Extended
Battery Modules
Communications Lock-
out
Load Segment Control
NOTE: Not applicable to 6kVA units
Manual Bypass
Configuration Mode
Setting
LCD Message
Description
Manual BAT Test
To initiate a manual battery test, press the
twice when «Manual Battery Test» is displayed on the
LCD. During the test the LCD displays ON BATTERY.
The UPS resets the automatic timer after a manual
battery test. The LCD displays «Battery not charged»
when UPS test is requested but the battery is not
fully charged.
Manual UPS Test
To initiate a manual UPS self-test, press the
twice. During the test, the LCD displays ON BATTERY.
Site Fault Set
Select Enable or Disable. When enabled, the alarm sounds Detect Enable
when the ground connection is missing or the line and
neutral wires are reversed in the wall outlet.
Modem Support?
This parameter is reserved for future use, and should not
be modified by the user.
Select EBM Type
Select the number of EBMs connected to the UPS:
Select 0 through 5.
You are prompted to save this setting. Refer to the
documentation that came with your battery pack for
more information.
COM Control
For greater levels of security, users may choose to have
Cmds
the UPS disregard shutdown commands that come from
the power management software or other communication
sources.
• When disabled, the UPS does not accept a shut down
command via the communication port, USB port, or
communication slot adapter.
• When enabled, the UPS operates normally in response
to external commands.
You are prompted to save this setting.
Load Group Set
Allows manual control of load segments (see «Load
Segments» Section 5.3)
By repeatedly pressing the scroll button, the individual
load segments can be turned on and off.
CAUTION To prevent the unintentional shutdown of
specific load segments, confirm your selection before
pressing the
Manual Bypass
This parameter is used to manually place the UPS in
GO
Bypass mode.
Config Mode Set
This parameter is reserved for future use, and should not
be modified by the user. The setting may be toggled
between EscapeConfigMode and Enter ConfigMode.
It should always be set to EscapeConfigMode.
↵ ↵
button.
Default Settings
↵ ↵
button
Battery Test
↵ ↵
button
UPS Test
No Modem Support
Extern Pack: 0
Enable
Group 1On 2On
Bypass OFF
EscapeConfigMode
Hi just repaired a Powerware 9120 700VA that was showing ‘DC BUS FAULT’.
At first I pulled C14 and others ( C10, C40 C42 & C48 as they are in close prox. to heat sources )
I measured the capacitance of the pulled caps, But the were all within 10-15% of there rating. So I though bummer this is not going to be easy as I don’t have an ESR meter.
But then I found this video «#135: Measure Capacitor ESR with an Oscilloscope and Function Generator» and last year I purchased a Rigol MSO1104Z-S so after a couple of minutes setting up and testing known good and bad caps as a test. Was able to very quickly go thru and test the pulled caps.
So C14 was like 89uF so thats within 11% of 100uF and on a 20% spec cap it still looked ok to the DMM but its ESR was off the charts.
The rest of the caps were perfect.
So if you have a ‘DC BUS FAULT’ and you have measured C10 and C14 and you still think they are ok, REPLACE THEM.
Replaced: C10 with Nichicon 100uF 63V 105�C and remounted the nearby diodes slightly off of the board as its looks like they get nice and toasty.
I also have a Powerware 9120 1000VA.
I replaced C10 and remounted the diodes the same as the 700VA just to be on the cautious side.
Theres not ‘Fault’ but I think it might be the same as magdtron its making a to so nice sounds while charging the batteries.
— The sound disappears after a Battery test for awhile but then returns after about a 30 secs.
— Also disappears when Mains supply is removed.
— In HE (High Efficiency) mode or Bypass Mode the sound still exists if Mains supply is connected and the batteries are being charged.
Also I found out that the Powerware/Eaton EBM connector is 5x shrouded 4mm banana plugs in a moulded connector.
So I’m going to design a 3D printed plug to hold off shelf shrouded 4mm banana plugs, Custom EBM 