Replacing the NVRAM III battery

About replacing the NVRAM III battery

The NVRAM III adapter has one detached, sealed, lead-acid battery that is recharged whenever the system is turned on and operating normally. If the battery continues to read low after 24 hours of normal system operation, you must replace the battery or the NVRAM III adapter.

Note
The NVRAM III adapter in the C3100/C6100 series is different from the NVRAM adapter in other models of NetCache appliances. It is not interchangeable with NVRAM adapters from other models of NetCache appliances.

Replacing the NVRAM III battery consists of the following procedures:

Location of the NVRAM III battery

The following figure shows the battery location.

Removing the NVRAM III battery

To remove the NVRAM III battery, complete the following steps.

Step	Action
1	Open the PCB carrier. Follow the procedure in Opening the PCB carrier. Caution Be sure to wear the antistatic wrist strap and attach the grounding leash to the C3100/C6100 chassis.
2	Unplug the electrical wires from the connector on the NVRAM III adapter. Caution If you did not perform a clean shutdown using the `halt` command, disconnecting the NVRAM battery from the NVRAM III adapter results in data loss.
3	Flip the retaining clip on the battery carrier down. WARNING If the battery is leaking, follow the procedure in Handling a leaking NVRAM III battery.
4	Remove the battery from the battery carrier in the chassis and set it aside.

Handling a leaking NVRAM III battery

The hazardous components of the NVRAM III battery are lead, sulphuric acid, fiberglass, and polystyrene.

To handle a leaking NVRAM III battery, complete the following steps.

Caution
Perform this procedure after you remove the battery from the NetCache appliance.

Step	Action
1	Neutralize the leaking substance with bicarbonate (baking soda), sodium carbon (soda ash), or calcium oxide (lime).
2	Flush the neutralized substance with water into the sewage system. WARNING Do not flush or pour the unneutralized substance into the sewage system.
3	If the unneutralized substance...	Then...
	Has made contact with the skin and the contact area is large, or if blisters form	Flush the affected area with water and see a physician.
	Has made contact the your eye	Call a physician immediately and flush the eye with water until the physician arrives.
	Is ingested	Call a physician. If the patient is still conscious, also flush the patient's mouth with water and have the patient drink milk or sodium bicarbonate solution.

Installing the NVRAM III battery

To install the NVRAM III battery, complete the following steps.

WARNING
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions.

AVERTISSEMENT
Il y a danger d'explosion s'il y a remplacement incorrect de la pile. Remplacer la pile seulement avec une pile du même type ou d'un type équivalent recommandé par le fabricant. Mettre au rebut les piles usagées selon les instructions du fabricant.

ACHTUNG
Explosionsgefahr bei unsachgemäßem Austausch der Batterie. Die Batterien nur durch denselben oder einen vom Hersteller empfohlenen gleichwertigen Typ ersetzen. Gebrauchter Batterien nach Angaben des Herstellers loswerden.

Step	Action
1	Secure the NVRAM III battery carrier to the C3100/C6100 chassis by tightening the thumbscrews.
2	Plug the electrical wires into the J1 connector on the NVRAM III adapter.
3	Go to Closing the PCB carrier.