6.2 UPS Startup Procedures
The UPS must be completely installed and tested by authorized engineer, and external power supply switch is closed, then
you can start the UPS.
6.2.1 Startup Procedures in Normal Mode
W ARN ING ! T hese procedures result in m ains voltage being applied to the UP S outp ut
term inals.
W ARN ING ! If any load equipm ent is connected to the UPS ou tput term inals, check with the
user that it is safe to ap ply pow er. If the load is not ready to receive pow er, please disconnect
the d ow nstream load sw itch , and stick a w arning label on the connection point of the load.
Use the following procedures to turn on the UPS from a fully powered down condition:
1. Open the front door of the UPS, ensure that the internal maintenance bypass switch Q3 is disconnected, while
the input cables and copper bars are reliably connected.
2. Close the external input switch, ensure that the UPS input voltage, frequency, and phase are normal.
W ARN ING ! In parallel UPS configuration, all op erations related to disconnection or connection
of the m ainten ance bypass sw itch sh all be executed within three seco nds to avoid overload
situations & dam age to the maintenance bypass sw itch.
3. Close the output switch Q5, bypass input switch Q2, rectifier input switch Q1, and all external output isolating
switches (if any) of the UPS in turn.
At the moment, the system is powered on, and the startup screen pops up.
About 25 seconds later, click the LOG IN icon to enter the system by inputting correct password.
6 Single UPS Operation Introduction
96
Vertiv™ Liebert® APM Plus User Manual
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