Хуавеи ДЦДУ-03Б Јединица за дистрибуцију једносмерне струје

Процедура

1. Ставите ЕСД каиш за зглоб или пар ЕСД рукавица.
   ОБЈАВА:

   Предузмите одговарајуће мере заштите од ЕСД, на пример, ставите ЕСД каиш за зглоб или пар ЕСД рукавица, како би се спречило електростатичко оштећење плоча, модула, или друге електронске компоненте.
2. Modify the management state. To modify the management state, you need to block the cells whose RFUs and BBU are powered by the DCDU to be replaced. За детаље, see Replacing a BBU3900 or BBU3910 Case and Replacing an RFU.
3. Опционо: Before replacing a DCDU-03B or DCDU-11B, record the status of circuit breakers SW0 to SW9 on the DCDU, and set all the circuit breakers to OFF. If a DCDU-12B is to be replaced, skip this step.
4. Disconnect the DCDU from power supply provided by the power equipment listed in Table 1.
5. Record the installation positions (DC output ports) of all connectors on the DCDU, and remove the connectors.
   БЕЛЕШКА:

   Да бисте уклонили ЕПЦ4 / ЕПЦ5 конектор, уради следеће: Drag the puller on the connector to unlock the latch of the connector. Затим извуците конектор из порта.
6. Use a Phillips screwdriver to remove the protective cover for the DC input wiring terminal block from the DCDU, као што је приказано на следећој слици.
   Фигура 2 Removing the protective cover for the DC input wiring terminal block from a DCDU
   
7. Record the connections of the DC input power cables, and disconnect the power cables.
8. Use a Phillips screwdriver to remove the four screws from both sides of the DCDU, and pull the DCDU out of the cabinet along the guide rails gently, као што је приказано на следећој слици.
   Фигура 3 Removing a DCDU
   
9. Gently push the new DCDU into the installation position along the guide rails, and tighten the four M6 screws on both sides of the DCDU to 2 Н.·м (17.7 lbf.in.).
10. Remove the protective cover for the DC input wiring terminal block from the new DCDU, reconnect the removed power cables to the new DCDU according to the record, and reinstall the protective cover.
11. Reinstall the removed cable connectors to the new DCDU according to the record.
12. Turn on the switch on the power equipment for the DCDU to power on the DCDU.
13. Turn on the circuit breakers on the DCDU that have been set to OFF in 3 according to the recorded status of the circuit breakers.
14. Check the indicators according to the following table to check whether the DCDU is working properly.

    Сто 2 Контролна листа одржавања

    Предмет	Нормал Статус
    Индикатори на РРУ панелу	РУН индикатор: трепћући (укључено за 0,125с и искључено за 0,125с, or on for 1s and off for 1s) АЛМ индикатор: стабилно искључен
    Indicators on the BBU	The RUN indicator on a UPEU is steady on. The STATE indicator on a FAN is blinking green (укључено за 1с и искључено за 1с). The normal status of the indicators on other boards in a BBU is as follows: РУН индикатор: blinking green (укључено за 1с и искључено за 1с) АЛМ индикатор: стабилно искључен ACT indicator: steady on

15. Скините ЕСД ремен или ЕСД рукавице, и спакујте сав алат.