Battery Backup Power BBP-AR-2000-PSW-ONL User Manual page 30

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4.3.3.10 Turn off the Utility Input breaker.
4.3.3.11 Your setting changes are now complete.
4.3.3.12 Turn UPS off
(1) Line mode(AC input available) : Press Off key
beeps heard, UPS output will shut off. UPS will stay in standby mode,
fan(s) keep spinning and battery will be remained recharging if AC input
still available after output is off, otherwise it will be shutdown completely.
(2) Backup mode (AC input not available): Press Off key
twice beeps heard, UPS output will shut off. 10 seconds later, fan stop
spinning and UPS shutdown completely.
4.3.3.13 Self-Test (Line mode only)
The purpose of self-test is to ensure the backup capability of battery set
and it can only be applied when UPS is working under line mode (AC
input available) and battery set was proper recharged.
Press key
And press
If UPS transfer to backup mode for 10sec and transfer back to line mode
operation without any code or alarm, means the battery set is healthy,
otherwise UPS may give code to indicate the cause of failure.
* Press the Enter key to save changes.

to change the LCD display to below figure.
key to start self-test as below figure.
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and hold until twice
and hold until