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6 Trouble shooting
SYMPTOM CAUSE REMEDY
Missing battery Charge battery up to 4 hours
Battery fault Replace with the same type of
battery
No LED display
on the front panel
Power switch not pressed Turn on the switch again
Alarm buzzer
beeps
continuously
when AC supply
is normal
UPS overload
Verify that the load matches the
UPS capability as specified in
the specs
UPS overload Remove some non-critical load
Battery voltage is too low Charge battery 4 hours or more
When power
failure, back-up
time is short
Battery fault due to high
temperature operational
environment, or improper
treatment of battery
Replace with the same type of
battery
Fuse is blown Replace with the same type of
fuse
Mains normal but
LED is flashing
Power cable is loose Reconnect the power cable
properly
Software not properly
installed
Check the settings of the
software
Communication
lost between UPS
and computer.
Cable not properly connected
Check if the RS232-cable is
properly connected to COM1 /
COM2 of the computer and
reconfirm the settings once
again
If any abnormal situations occur that are not listed above,
please call the service centre immediately.