Bosch Appliances DVA-12T installation manual Replacing a Failed PSU Module, PSU Module Overview

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3.Secure the BBU module to the enclosure. Tighten the two (2) retention screws as shown above on the back of the BBU module.

4.Once the new BBU module is correctly installed into the subsystem, the LED should start flashing, indicates the BBU is being charged. When the BBU is fully charged, the LED will light amber constantly.

NOTICE!

The life expectancy of a BBU is approximately 500 cycles. Follow the procedures above to replace an old BBU with a new BBU in order to maintain fault-tolerant subsystem functional- ities. We recommend replacing the BBU yearly.

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Two redundant PSU modules: The RAID subsystem comes with two fully redundant, hot- swappable PSU modules. These modules are located at the rear of the subsystem. Immediate replacement: When a PSU fails, it should ideally be replaced immediately. Do not remove the PSU module unless a replacement is readily available. Removing a PSU without a replacement will cause severe disruptions to the internal airflow and the sub- system will overheat, possibly causing irreparable damage to some of the subsystem components.

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NOTICE!

Although the subsystem can operate using single PSU module, it is not advisable to run the RAID subsystem with a single PSU module for an extended period of time.

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NOTICE!

Before you insert a new PSU, be sure that it has the same warning label on its extraction lever as that shown on the lever of a remaining PSU. Double-check to avoid mixing a similar yet dif- ferent PSU of another series.

To replace a PSU, please follow these steps:

1.Turn off the PSU. The power switch is located at the rear of the PSU. (See Figure 6.6)