Chapter 6 Maintenance; Setup Procedures; Start Up - Liebert UPS System User Manual

This chapter mainly introduces the daily using and maintenance of UPS and the
operation inside the UPS is not covered here. If maintenance should be done to the
UPS, Q1, Q2 and QF1 should be disconnected, and then wait for 8 minutes until
there is no high voltage inside the UPS. Don't touch any components of the UPS
before reading this manual.
Anything not understood, please consult out technical support engineer.

6.1 Setup procedures

6.1.1 Start up

After the UPS is switched on and if the UPS input power meets specified input
requirements, the following operations can be done:
1. Start from utility
1) Make preparations according to Section 4.1.1, introduce the input source to the
input terminals of UPS cabinet;
2)Turn on Q2 and Q5 and wait until the bypass indicator turns green;
3) Turn on Q1 and the QF1 according to Section 4.1.2. The UPS will transfer to
inverter mode without interruption after the inverter starts normally.
2. Start from utility
When the battery is normal and is connected to the DC bus all the time, the inverter
can start from battery. The start procedures are: press "start" button on the
operation panel for longer than 2s, close Q5 when the inverter operation indicator
turns green. Now the inverter powers the load. At this time the battery indicator and
load indicator all illuminate green.
Note:
The UPS can not start from the battery that is used for the first time.

Chapter 6 Maintenance

Chapter 6 Maintenance
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