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Chapter 11 Troubleshooting
The automatic discharge test is enabled by default and runs during the transition from
mode. After the test is complete, the charge cycle restarts to completely charge the
Rest
batteries and then continues to
The automatic battery test runs approximately once every three months and does not run
again until the next test period. If a manual battery test is requested, the automatic battery test
timer is reset so that it does not run for the next test period.
Requirements for successful battery test
In order for a battery test to complete successfully the following minimum requirements must
be met:
1. Load must be at last 10% of the rated capacity or greater to run adequate discharge,
however 25% is recommended load capacity of the UPS that should be protected by the
UPS unit
2. Battery capacity should be 80 %, that is the battery is charged to at least 80 % of its
capacity
3. There is no running alarm (except Battery fault)
4. Load level has not varied by more than +/-10 % (from the initial load level present at the
beginning of the test to the end of the test)
5. The bypass voltage is in tolerance for bypass transfer (in case of end of backup, to
transfer to bypass)
6. UPS mode must be in Online mode or HE (High efficiency) mode.
These requirements applies to both the UPS itself and any attached EBM(s), that is for all
battery packs present in the UPS installation.
UPS can either be in ABM or continuous battery charge mode.
Additional information
For both the automatically and manually started battery tests, the following applies:
The battery test only runs for a short duration to measure the change in voltage over that time
period. Without a minimal amount of load, there will not be a measurement of the change of
voltage over that time period. Without sufficient load, the battery test cannot determine a bad
or weak battery.
As a result of an underload, that is less than 10 % load capacity, the UPS will issue the,
Battery test cancelled UPS Underload.
170
mode.
Rest
error and cancel the battery test.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
to
Float
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