OFF
ON SILENCE
FAULT
LINE
BATTERY BYPASS INVERT
BATTERY
LOAD
Fig. 10(b) LED Display of 2kVA/3kVA UPS with Heavy Load
3. If all load indicators shine and the buzzer beeps every 0.5
second, it indicates that overload exists. In this case, some less
critical loads should be disconnected. Usually it is recommended the
UPS assume no more than 70% rated load so that the system
operation won’t be affected by abrupt load fluctuation and the UPS
lifetime can be extended.
Notice
If the system transfers from Normal mode to Bypass mode for 3
times within 1 hour due to overload, it will remain in Bypass mode
for 1 hour and can’t transfer back to Normal mode till the overload is
removed.
II. Start Battery mode
In the event of mains failure, user may turn on the UPS to start
Battery mode to supply the load.
26 Chapter 3 Operation
E1-20010915-C-1.0
