71UPS Maintenance |6 Replace the UPS front cover (see Figure 37).Align the front cover with the front of the chassis.Insert the right-side tabs on the front cover into the right-side chassis tab openings.Push the left side of the cover forward and snap it to the chassis.NOTE: Ensure that the LCD panel on the UPS chassis aligns with the LCD window on the front cover beforesecuring the cover to the chassis.12Figure 37. Replacing the UPS Front CoverRecharging and Replacing BatteriesIf you store the UPS for a long period, recharge the battery every 6 months by connecting the UPS toutility power. The batteries charge to 90% capacity in approximately 4 hours. However, it isrecommended that the batteries charge for 48 hours after long-term storage.You should track recharge dates. Log the last date the batteries were recharged. Do not use the UPS ifthe last recharge date was more than six months ago.When the status summary screen displays the UPS fault icon with the “Service Battery” alarm and theaudible alarm sounds continuously, the batteries may need replacing.Contact your service representative to order new batteries.