321 Studios GHDX2-2430S-24F4D manual Removing the BBU Module

Chapter 5: Subsystem Maintenance

BBU failure can result from the following:

1.A BBU (Battery Backup Unit) has lost its ability to hold electrical charge. This may be the case after the battery cells have been recharged for many times regardless of how long the module has been used. Therefore, a stable power source is important for system operation.

2.The charger circuitry mounted underneath the controller top cover has failed.

There are other conditions that might trigger the BBU fault events and light the BBU fault LED:

1.The temperature sensor embedded with the subsystem’s charger circuit reports a temperature reading exceeding 45 degree Celsius. The charger circuits will enter a low-power and self-protection state.

2.A BBU module has been charged for over seven (7) hours. A timer is embedded with the charger. When this occurs, the charger will enter a timer fault state. The fault condition usually occurs with a brand new BBU or with a totally discharged BBU. Charging will resume automatically if you remove and re-install the BBU module.

To replace a BBU module, please follow these steps:

Step 1. Remove the BBU module from the subsystem by loosening its retention screw, and then gently removing the module from the chassis.

Figure 5-5: Removing the BBU Module

Step 2. Re-install the new BBU. To do this, insert the BBU into the module slot, and fasten the retention screw to secure the BBU.

Subsystem Maintenance 5-9