6.2 UPS Startup Procedures
The UPS must be completely installed and tested by authorized engineer, and ensure that the external power supply switch is
closedd, then you can start the UPS.
6.2.1 Startup Procedures in Normal Mode
W A RN IN G!
1. These procedures result in m ains voltage b eing applied to the U PS output term inals.
2. If any load eq uipm ent is connected to the U PS output term inals, ch eck with the user that it
is safe to apply po w er. If the load is not read y to receive pow er, please disconnect the
dow n stream 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 opened, 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 A RN IN G! In parallel UPS co nfiguration, all operations related to disconnection or connection
of the m aintenance bypass sw itch shall be executed w ith in three seconds to avoid overload
situations & dam age to the m aintenance bypass switch.
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 icon to enter the system by inputting correct password.
6 Single UPS Operation Introduction
106
Vertiv™ Liebert® EXM2 UPS User Manual
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