The LED bargraph (LED chain on the left hand side of the ON

/ OFF button) show during operation the actual utilization of the UPS (chapter 8.1.1, page 45 ff).

6.1.3Bypass Operation

If the inverter is overloaded or if overtemperature is detected, e.g. also if an inverter defect is detected, voltage is supplied to the load via the bypass that switches on automatically. This is signalled by the bypass symbol.

This function is also referred to as passive redundancy. It protects against total failure of the voltage supply on the protected busbar, however in the operating status that is now attained, mains faults would have a direct effect on the load.

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