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Chapter 7. UPS maintenance
Equipment care
For the best preventive maintenance, keep the area around the equipment clean and dust free. If the
atmosphere is very dusty, clean the outside of the system with a vacuum cleaner. For full battery life, keep
the equipment at an ambient temperature of 25°C (77°F).
Note: If the UPS requires any type of transportation, verify that the UPS is disconnected and turned off and
then disconnect the UPS internal battery-pack connector, see "Connecting the internal battery pack" on
page 17. The battery packs are rated for a 3-5 year service life. The length of service life varies, depending
on the frequency of usage and ambient temperature. Battery packs used beyond expected service life will
often have severely reduced runtimes. Replace battery packs at least every 4 years to keep units running at
peak efficiency.
Storing the equipment
If you store the equipment for a long period, recharge the battery packs every 6 months by connecting the
UPS to utility power. The EBM will charge to 90% capacity in less than 3 hours. However, the battery packs
should be allowed to 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 battery packs
were never recharged, do not use them. Contact your service representative.
Replacing battery packs
When the battery replacement screen is displayed (see illustration), replace the battery packs. Contact your
service representative to order new battery packs.
Replace all battery packs in the UPS and any EBMs connected to the UPS at the same time. The replacement
battery packs must have no more than 12 month variation between their dates of manufacture and should
not have reached or exceeded their shelf life. Dispose of battery packs in accordance with local regulations.
Battery packs can be replaced without turning off the UPS or disconnecting the load. If you prefer to power
down to change the battery packs, see Shutting down the UPS.
Note: DO NOT DISCONNECT a battery pack while the UPS is in Battery mode. Be aware that the UPS can
switch to Battery mode at any time and without warning.
Consider all warnings, cautions, and notes before replacingbattery packs.
Important:
• Servicing should be performed by qualified service personnel knowledgeable of batteries and required
precautions. Keep unauthorized personnel away from batteries.
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