PowerWalker VI 450 SE Bedienungsanleitung Seite 14

9. Trouble Shooting
Symptom
No LED display on the
front panel.
Alarm buzzer
continuously when AC
EN
supply is normal.
When power failure,
back-up time is shorten.
Mains normal but LED is
flashing.
If any abnormal situations occur that are not listed above, please call service people immediately.
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Possible Cause
1. Battery weak.
2. Battery defect.
3. Power switch is not pressed.
beeps Overload of the UPS.
1. Overload of the UPS.
2. Battery voltage is too low.
3. Battery defect due to high temperature
operation environment, or improper
operation to battery.
Power cord is loose.
Remedy
1. Charge battery up to 8 hours.
2. Replace with the same type of
battery.
3. Press the power switch again.
Verify that the load matches the UPS
capability specified in the specs.
1. Remove some non-critical load.
2. Charge battery 8 hours or more.
3. Replace with the same type of battery.
Reconnect the power cord properly.