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8. Maintenance
I. General
The UPS is virtually maintenance free: take care of proper environmental conditions and keep air inlets-
outlets free of dust.
II. Fuses
If the AC input fuse is defect, be sure it is replaced by a compatible fuse from the same make and type.
Never short circuit batteries. When working with batteries, remove watches, rings and other metal objects,
and only use insulated tools
.
III. Batteries
When replacing the batteries, use batteries with exactly same specifications.
9. Trouble Shooting
Symptom
Possible Cause
Remedy
No LED display on the
front panel.
1. Battery weak.
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 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,
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 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.
Power cord is loose.
Reconnect the power cord properly.
If any abnormal situations occur that are not listed above, please call service people immediately.
Read all safety rules before replacing the battery.
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