- 21 -
3) If the buzzer beeps twice per second and overload alarm is displayed on the LCD,
it means the system is overloaded. Please decrease the load immediately. 70%
of the load is recommended in case of sudden load added, which will not affect
the UPS to work normally
CAUTION
If the UPS has transferred to bypass mode due to overload for several
times and reach the setting times in 1 hour, it will keep in bypass mode
unless manually transfer to inverter mode or automatically transfer to
inverter mode 1 hour later without overloading
Battery mode
UPS can start in battery mode even if the AC is absent.
1)
Press the On button and hold for 1 second until hearing one beep, battery and
inverter indicators will be on after finishing self- diagnostics. The UPS will beep
once every 3 seconds which means it is working in battery mode
2) Add load the same as above AC mode description
CAUTION
Please decrease load immediately if the UPS is overload; otherwise, it will
shut it down within its overload capability. Please refer to technical specs
for overload capability.
3.2.4 Manual battery testing
When the inverter is working, if the input AC is normal, no overload, battery voltage
is not lower than 12V per unit, the battery testing can be carried out by pressing
button on the LCD control panel. When the battery is being tested, buzzer beeps,
battery indicator blinks. When the testing is complete, buzzer stops beeping, battery
indicator stops blinking, the UPS will recover to status before the testing. If there are
some problems with batteries, the LCD will show the details.
CAUTION
The battery status info will be refreshed every time after testing.
Battery fault info checked out by the testing due to battery not fully
charged can be confirmed after fully charging.
3.2.5 inverter shutdown
1) If the AC is normal, press the off button and hold for 1 second until hearing one
beep, inverter indicator will be off , bypass indicator will be on, and the UPS will
work in Bypass mode
2) If the AC is absent, press the off button and hold for 1 second until hearing one
beep, the UPS will shut down the output and the LCD will display shutting down.