Vertiv Liebert APM Plus - 6.5 UPS Shutdown Procedures

6.5 UPS Shutdown Procedures
6.5.1 Procedures for Completely Powering Down UPS
Complete UPS shutdown and load power-off should follow this procedure. All power switches, isolating switches, and breakers
are disconnected and then UPS no longer supplies power to load.
CAU TIO N : The follow ing procedures w ill cut off the load pow er, making the load com p letely
pow er off.
1. Click the INVERTER OFF key to stop the operation of the inverter (Refer to Operator Controls), then press the
EPO button to stop the operation of the rectifier, static switch, and battery.
2. Disconnect the external battery switch.
3. Disconnect the rectifier input switch Q1, bypass input switch Q2, and output switch Q5. At the moment, all the
internal power supply is off, and the TOUCHSCREEN does not display any more.
W ARN ING ! P ost a label at the AC inp ut distribution (generally far aw ay from the UPS) to alert
that th e U PS m aintenance is being operated.
W ARN ING ! W ait 10 m inutes for the internal DC bu s capacitance to d ischarg e. Then the UP S is
com pletely shut dow n.
W ARN ING ! H azardou s b attery voltage: The b attery term inals still have hazardous voltage
after the U P S is com pletely shut do w n.
6.5.2 Procedures for Completely Powering Down UPS while Maintaining Power to
Load
The following procedures are suitable for completely powering down the UPS and keeping the power supply to the load. Refer
to the procedures in Transfer from Normal Mode to Maintenance Mode.
6 Single UPS Operation Introduction
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Vertiv™ Liebert® APM Plus User Manual