Maintenance; Preventative Maintenance; Battery Maintenance - Ewent EW3940 Manual De Instrucciones

8.0 Maintenance

8.1 Preventative Maintenance

Preventive Maintenance ensures the longer Service life of UPS. Please check the
following steps every month：
1. Turn off the UPS;
2. Make sure the air grid is not blocked;
3. Make sure that the UPS surface is not covered by dust;
4. Check whether the input and output connectors are firmly connected
5. Make sure that the UPS is not affected with damp;
6. Turn on the UPS;
7. Let the UPS work in battery mode for about 5 minutes. If there is no other alarm
in this period, then the UPS is working normal; if there is another alarm message,
please contact the local dealer for help.

8.2 Battery Maintenance

The UPS contains a sealed lead-acid maintenance-free battery (batteries). Bad
environmental conditions, to high discharge frequency, to high temperature, etc will
dramatically reduce the battery life. The battery life will also reduce even if it is not
used. It is suggested to discharge the battery once every 3 months when AC is
normal. The following steps explains how to check the battery. When the battery is
near the end of its life, the battery will end in bad performance. So, please remember
the following steps of checking and maintenance:
1. Connect the UPS to AC and turn on the UPS, charge the battery for at least 10
hours. Do not attach any load to the UPS while charging.
2. Connect any load to the UPS (UPS and Surge outputs) and remove the input
plug from the UPS to simulate AC failure. The battery of the UPS will discharge
until the UPS turns off automatically. Please record the connected load and
discharge time for a later check.
3. The battery service life is about 2 to 3 years in normal conditions. But in such
condition as: high temperature or high discharge frequency, the battery service
life will reduce to about 0.5 to 1 year.
4. When the discharge time is 80% of the initial discharge time, the performance of
the battery will be weakened faster and accordingly the checking frequency of the
battery should be changed to every month.
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ENGLISH