Trouble Shooting
Symptom
Possible Cause
Remedy
No LED display
on the front
panel.
1. Battery weak.
1. Re-charge battery up to 8 hours.
2. Battery defect.
2. Replace with the same type of
battery.
3. Power switch is not
pressed.
3. Press the 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.
When power
failure, backup
time is shorten.
1. Overload of the UPS.
1. Remove some non-critical load.
2. Battery voltage is too low. 2. Charge battery 8 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 cable is firmly
connected to COM1/COM2 of the
computer and confirm the setting
again.
Mains normal
but orange LED
is on.
1. Fuse is blown.
1. Replace the same type of fuse.
2. Power cord is loose.
2. Reconnect the power cord
properly.
3. Battery defect.
3. Replace the same type of
battery.
If any abnormal situations occur that are not listed above, please call service
people immediately.
