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Vertiv™ Liebert® APM Plus User Manual
F igu re 6.7 B attery co ld start bu tto n
6.3 Procedures for Transfer Between Operation Modes
6.3.1 Transfer from Normal Mode to Battery Mode
Open the external power switch to isolate the mains power and initiate the UPS on battery mode. To transfer the UPS back
to normal mode, close the external power switch to re-connect the mains power to the UPS. 10 seconds later, the rectifier
restarts automatically, and the UPS works in normal mode.
6.3.2 Transfer from Normal Mode to Bypass Mode
Click the Off key as shown in Figure 6.8 below, and the UPS will transfer to bypass mode.
F igu re 6.8 T ran sfer UP S to B ypass m o de
N O T E: In bypass m o de, th e lo ad is directly fed by th e m ain s po wer in stead o f th e pu re A C po wer fro m
th e in verter.
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6 Single UPS Operation Introduction
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