APC RBC12I, RBC20J, RBC12J, RBC11I, RBC11J, RBC22I, RBC18, RBC9I

C.What happens when the replace battery LED does not clear? If the self test fails:

■If the battery capacity is greater than 75%, turn the unit off and restart it. When you turn a Smart- UPS on, it will initiate a self-test. After the test completes, the LED should clear.

■If the unit fails the self-test again, contact APC Customer Support (email: support.apcc.com or

phone: 800-800-4APC).

V.Increasing ‘Runtime Remaining’ of the Smart-UPS as viewed through Powerchute PLUS or SmartSlot Accessory and prevent premature Low Battery Signal

Discharging and recharging a Smart-UPS resets the microprocessor to properly read battery voltage. An accurate measurement is important when calculating the runtime remaining value appearing in Powerchute PLUS or SmartSlot Accessory.

A.Initiating a runtime calibration

The runtime calibration option is accessible using Powerchute PLUS software or an APC SmartSlot Accessory. Once the battery capacity reaches 100%, select this option. The unit will run on battery until battery capacity is 25%. At that point, the unit will return to utility power and begin recharging itself. If the runtime as seen through Powerchute PLUS or SmartSlot Accessory does not increase, then follow the instructions in the next section.

Note: APC recommends that a runtime calibration be initiated once every six months at a maximum.

B.Disconnect from utility

By disconnecting the UPS from utility, a premature low battery signal can be prevented. It is recom- mended that the power to the circuit be turned off at the distribution panel. Unplugging the Smart-UPS from the outlet is not recommended.

Note: The Smart-UPS will run on battery until it discharges completely, turning off the load. It is not necessary to discharge completely. Power can be restored to the unit once it reaches low battery condition(see owner’s manual for details on how to identify low battery condition).

If experiencing low runtime or premature low battery signal issues, contact APC Customer Support (email: support.apcc.com or phone: 800-800-4APC).