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7. Maintenance
I. General
The UPS is virtually maintenance free: maintain proper environmental conditions and keep air inlets-outlets
free of obstructions and dust.
II. Fuses
If the UPS is overloaded and the AC input fuse blows, be sure it is replaced by a compatible fuse of 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
Read all safety rules before attempting to replace the battery.
If replacing the batteries, use batteries with exactly the same specifications.
8. Trouble Shooting
Symptom
No LED display on the
front panel.
Alarm buzzer beeps
continuously when AC
supply is normal.
When power failure,
back-up time is shorter
than normal.
Mains normal but LED is
flashing.
If any abnormal situations occur that are not listed above, please call service people immediately.
Possible Cause
1. Battery weak.
2. Battery defect.
3. No Utility Power.
Overload of the UPS.
1. UPS Overloaded
2. Battery weak.
3. Battery weak due to age, high
temperature, or environment,.
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. Remove
some of the load
1. Remove some non-critical load.
2. Charge battery up to 8 hours.
3. Replace with the same type of battery.
Reconnect the power cord properly.
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