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4. Trouble Shooting
Symptom Possible
Cause
Solution
1. Missing battery
1. Charge battery up to
10 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 non
critical load
2. Battery voltage is too
low
2. Charge battery 10
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.
