Storing the ups and batteries, When to replace batteries, Control screens – Dell UPS 3750R User Manual

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UPS Maintenance

Replace the UPS front cover (see Figure 29).

Figure 29. Replacing the UPS Front Cover

Storing the UPS and Batteries

If you store the UPS for a long period, recharge the battery every 6 months by plugging the UPS into a
power outlet. The batteries charge to 90% capacity in approximately 4 hours. However, it is
recommended that the batteries charge for 48 hours after long-term storage.

Check the battery recharge date on the shipping carton label. If the date has passed and the batteries
were never recharged, do not use the UPS. Contact your service representative.

When to Replace Batteries

When the status summary screen displays the UPS fault icon with the “Service Battery” alarm and the
audible alarm sounds continuously, the batteries may need replacing. Contact your service
representative to order new batteries.

NOTE:

With the user-replaceable battery feature, UPS batteries can be replaced easily without turning the

UPS off or disconnecting the load.