Trouble Shooting
Symptom Possible
Cause
Remedy
1. Battery weak.
1. Re-charge battery up
to 8 hours.
2. Battery defect.
2. Replace with the
same type of battery.
No LED display
on the front
panel.
3. Power switch is not
pressed.
3. Press power switch
again.
Alarm buzzer
beeps
continuously
when AC
supply is
normal.
Overload of the UPS.
Verify that the load
matches the UPS
capability specified in
the specs.
1. Overload of the UPS. 1. Remove some
noncritical load.
2. Battery voltage is too
low.
2. Charge battery 8
hours or more.
When power
failure, back-up
time is shorten.
3. Battery defect due to
high temperature
operation environment,
or improper operation
to battery.
3. Replace with the
same type of battery.
1. Software is not
installed well.
1. Check the setting of
the software .
Communication
lost between
UPS and
computer.
2. Cable is not properly
connected.
2. Check the RS-232
cable is firmly
connected to
COM1/COM2 of the
computer and
confirm the setting
again.
1. Circuit breaker is
broken.
1. Reset the circuit
breaker..
Mains normal
but the UPS is
not working.
2. Power cord is loose.
2. Reconnect the power
cord properly.
If any abnormal situations occur that are not listed above, please call service
people immediately.
