| Autom. |
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| bypass |
| Power circuit with |
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REC |
| INV | faulty mains supply |
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Mains |
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| Safety busbar: |
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| Load | |
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Battery |
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charger |
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Battery
Diagram
The mains is not within the required tolerance range or has failed. In this case power is supplied to the inverter from the charged battery without interruption. The power supply to the loads is therefore also ensured in the event of a mains failure. This drains the capacity of the battery and it is discharged. This status is signalled by the battery symbol (LED Battery) lighting up, as well as an intermittent acoustic signal every 4 seconds and every second before switching off. This can be suppressed by pressing the “Alarm off”button. With decreasing battery capacity the alarm is activated automatically. Depending on the expansion level, age and condition of the battery and in particular on the load to be supplied, the standby time can vary from a few minutes to several hours.
Bypass
Line 
Inverter
Battery
The LED bar graph (LED chain above the pictogram) show during operation the actual utilization of the UPS (s. chapter 6, page 35).
The inverter is switched off if the battery voltage drops below a
Never store the unit in this condition! The discharged battery system should be recharged within a week at the latest.
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