Also avoid
Never connect any additional loads to the UPS if there is a mains failure, i.e. if the UPS is working in emergency power operation.
The UPS output is
It is possible to press the "TEST" button (pos. 2 p. 42) to perform a manual check on the major hardware components of the UPS. This test can only be initiated if the unit is operating normally, and it involves switching the loads over to UPS inverter supply for a few seconds. As well as checking the procedures and the functional capability of the static bypass switch, this check also involves drawing current from the battery for a short time. The inverter has to provide the entire load supply, which means the entire process chain is tested with this function. Normal operation is restored after the check.
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