Vertiv Liebert APM 300, User Manual

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38 Chapter 5 Operating Instructions
APM 300 Integrated UPS Single Module And Parallel System User Manual
Rectifier input switch
Bypass input switch
Maintenance bypass switch
Output switch
Figure 5-1 Positions of power switches
5.2 UPS Start-Up Procedures
Before startup, the UPS must be fully installed and commissioned, and the external input switch must be
closed. Once those general conditions are met, the UPS may be started.
5.2.1 Start-Up Procedures
Warning
During these procedures the output terminals are live. If any load equipment is connected to the UPS output terminals,
please check with the load user and ascertain whether it is safe to apply power to the load. If the load is not ready to
receive power, open the corresponding output distribution switch.
The procedures for turning on the UPS from a fully powered down condition are as follows. In a parallel system,
perform each step of the procedures in every UPS module before proceeding to the next step.
1. Close the output switch, bypass input switch and rectifier input switch of the UPS in turn.
At this point, the LCD displays the start screen. The rectifier indicator flashes green while the rectifiers are
starting up. It stops flashing and becomes solid green about 30 seconds after the rectifiers enter normal
operation. After initialization, the bypass static switch closes. The states of the indicators are shown in
Table 5-1.
Table 5-1 Indicator state
Indicator State
Rectifier indicator Green
Battery indicator Off
Bypass indicator Green
Inverter indicator Off
Load indicator Green