Procedure For Switching The Ups To Power The Load From A Power Off Condition - Liebert 7200 Series User Manual

7200 Series UPS User Manual
Single Module and 1+1 Parallel System
2.2 Procedure for switching the UPS to power the load from a power off
condition
This procedure should be followed when turning on the UPS from a fully powered down condition -
i.e. where the load is not being initially supplied at all. It is assumed that the installation is complete,
the system has been commissioned by authorized personnel and the external power isolators are closed
1. Open the UPS doors to gain access to the main power switches.
THE FOLLOWING ACTION WILL APPLY POWER TO THE LOAD EQUIPMENT - ENSURE THAT IT IS SAFE
TO DO SO.
2. Close the bypass power switch Q2.
The Module Mimic LED's will indicate Bypass a.c. input supply present ( 1 - steady green ) and
the Load on bypass ( 3 - flashing amber ).
The Display screen will show the following:
LIEBERT
U P S
RECTIF. SWITCH OPEN
BATTERY C.B. OPEN
OUTPUT SWITCH OPEN
HH.MM.SS DD.MM.YY
3. Close the Rectifier input power switch Q1 the and UPS output power switch Q4
After approximately 20 seconds the Module Mimic LED's will change so that the Load on
inverter will light ( 2 - steady green ) and the Load on bypass ( 3 ) will extinguish.
The display window will show:
BATTERY C.B. OPEN
HH.MM.S DD.MM.YY
4. Before closing the battery circuit breaker check the d.c. bus-bar voltage. From the above
window press the ENTER key:
The Main Menu Window will display:
> MEASUREMENT
FUNCTION
MAINTENANCE
SETUP
OUTPUT
INPUT
> BATTERY
TEMPERATURE
document in response to "powersure ups"
WARNING
Initializing Window: after first connecting power to the
UPS and closing the Q2 isolator, this message will
appear on the LCD screen. It persists for about five
seconds while the control firmware is loaded. It is
followed by a screen showing various messages with
the time and date on the bottom line.
Note: If input power is present but the display remains
blank, locate the UPS Logic Board and observe that the
indication on the board is a flashing 88. If this is not the
case then the Micro Controller is not working, anyway
contact your dealer for advice.
<
Select MEASUREMENT and press ENTER key:
< Select BATTERY and the d.c. bus bar voltage will
be displayed:
Chapter 2 - Operating Instructions
Procedure
Page 2-1
Issue 6
(03/98)