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4. Trouble Shooting Guide
If any abnormal situations occur other than the listed below, please call service people immediately.
The UPS fails to turn on and No LED display on the front panel
Possible Cause
Battery weak.
Battery defect.
Power switch is not pressed.
Alarm buzzer beeps continuously when AC supply is normal.
Possible Cause
Overload of the UPS.
When power failure, back-up time is shortened than the normal status
Possible Cause
Overload of the UPS.
Battery voltage is too low.
Battery defect due to high
temperature operation
environment, or improper
operation to battery.
Mains normal but LED is flashing.
Possible Cause
Power cord is lost.
ion
Solut
Charge battery up to 8 hours.
Replace with the same type of
battery.
Press the power switch again.
Solution
Verify that the load matches the
UPS capacity specified in the
specs.
Solution
Remove some non- critical load.
Charge battery 8 hours or more.
Replace with the same type of
battery.
Solution
Reconnect the power cord
properly.
5
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