4. Trouble Shooting
Symptom
Possible Cause
Remedy
No LED display
on the front
panel.
1. Missing battery.
1. 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 a 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, back-up
time is shorten.
1. Overload of the UPS.
1. Remove some noncritical
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.
Mains normal
but LED is
flashing.
1. Fuse is blown.
1. Replace the same type of
fuse.
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.
