Table of Contents
Advertisement
Chapter 10 UPS maintenance
Attention! Mixing old and new batteries in any UPS installation will lead to a thermal destruction of
the UPS unit!
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!
To replace the EBM(s):
Step 1.
Remove the center section of the front bezel.
Step 2.
Remove the four captive screws to open the front bezel.
Step 3.
Remove the three screws to pull out the metal protective cover of the battery pack.
Note: A ribbon cable connects the LCD control panel to the UPS. Do not pull on the cable or
disconnect it.
Step 4.
Pull out the plastic handle of the battery pack, and slide the pack out slowly on to a flat and
stable surface. Use two hands to support the battery pack. See "Recycling the used
equipment" on page 55 for proper disposal.
Step 5.
Verify that the replacement batteries have the same rating as the batteries being replaced.
Step 6.
Slide the new battery pack into the UPS. Push the battery pack firmly to ensure a proper
connection.
Step 7.
Screw the metal protective cover back onto the unit.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
under
Control
/
Start battery test
for additional information on how to
Chapter 3
127
Advertisement
Table of Contents
