6.3.3 Transfer from Bypass Mode to Normal Mode
When the UPS is in bypass mode, click the On key as shown in Figure 6.9 below, and the inverter starts up. Then the UPS is
transferred from bypass mode to normal mode.
F igu re 6.9 T ran sfer UP S to N o rm al m o de
6.3.4 Transfer from Normal Mode to Maintenance Mode
The following procedures will transfer the UPS from inverter output mode to the maintenance bypass mode.
CA UT IO N : P o wer su pply in terru ptio n dan ger o f th e lo ad
B efo re m ak in g th is o peratio n , read th e in fo rm atio n o n th e T O UCHSCR EEN to m ak e su re th at
th e bypass su pply is n o rm al an d th at th e in verter is syn ch ro n o u s with th e bypass su pply, so as
to n o t risk a sh o rt in terru ptio n in po wer to th e lo ad.
1.
Shut down the inverter according to Transfer from Normal Mode to Bypass Mode.
N O T E: T h e alarm can be silen ced bu t leaves th e alarm m essage displayed u n til th e alarm co n ditio n is
rectified.
2.
Close the maintenance bypass switch Q3.
3.
At the moment, the maintenance bypass and UPS static bypass are in parallel.
4. The TOUCH SCREEN displays 'Maint. Switch Closed'.
6 Single UPS Operation Introduction
110
Vertiv™ Liebert® APM Plus User Manual
Summary of Contents for APM 0250kMK16FN02000
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