Trouble Shooting
Use the table below to solve minor UPS installation or operation
problems. If any abnormal situations occur that are not listed
above, please call service people immediately.
Symptom
Possible Cause
Remedy
No LED display on
the front panel.
1. Missing battery.
1. Charge battery up to 10
hours.
2. Battery defect.
2. Replace with the same type
of battery.
3. When the Input cord
isn’t electrified and
Power switch is not
pressed.
3. Press the power switch
again or electrify the Input
cord
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.
When power
failure, back-up
time is shorten.
1. Overload of the UPS. 1. Remove some non critical
load.
2. Battery voltage is too
low.
2. Charge battery 10 hours or
more.
3. Battery defect due to
high temperature
operation environment,
or improper operation
to battery.
3. Replace with the same type
of battery.
Communication
lost between UPS
and computer.
1. Software is not
installed well.
1. Check the setting of the
software.
2. Cable is not properly
connected.
2. Check the RS-232 or USB
cable is firmly connected
to COM1/COM2 of the
computer and confirm the
setting again.
Mains normal but
LCD display
Battery mode.
1. Circuit breaker is
broken.
1. Reset the circuit breaker..
2. Power cord is loose.
2. Reconnect the power cord
properly.
