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Chapter 10 UPS maintenance
Overview
For the best preventive maintenance, keep the area around the equipment clean and dust free.
If the atmosphere is dusty, clean the outside of the equipment with a vacuum cleaner. For full
battery life, keep the equipment at an ambient temperature of 25 °C (77 °F).
Notes: • If the UPS requires any type of transportation, verify that the UPS is disconnected from its
power source and is turned off.
• The batteries must be disconnected from the UPS.
• The battery pack is 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
or after replacing the batteries.
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
Attention! Once batteries are replaced, it is important to run a charge cycle of 48 hours to ensure the
capacity and runtime is synchronized. Two battery tests are performed during that portion
of the ABM cycle, three measurements are performed and will ensure there are no bad
cells in the battery string.
The battery algorithm needs a known starting point for ABM functionality, battery test and
the estimated runtime to be reasonable. Charging the batteries for 48 hours ensures those
functions are set correctly and advised for any start-up to ensure the batteries are good
and the timers are setup correctly.
Run a manual battery test and then let the batteries charge for 48 hours. See
Display functions
manually start a battery test.
During the 48 hour charge cycle the UPS is not to protect any load!
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
under
Control
/
Start battery test
for additional information on how to
Chapter 3
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