Liebert 7200 Series User Manual page 27

7200 Series UPS User Manual
Single Module and 1+1 Parallel System
3. You now have access to all function windows. Press the DOWN arrow key until the cursors
have selected NEXT PAGE - press the ENTER key.
MODEM CONNECTION
> ON/OFF UPS CONTROL <
RELOAD UPS DATA
RESET BUFFERS
4. Press the DOWN arrow key until the cursors have selected ON/OFF UPS CONTROL - press
the ENTER key:
The following window allows the operator to select the UPS inverter ON or OFF, select the rectifier ON or OFF,
select the rectifier to manual or float voltage and to switch OFF the Line voltage to the load.
Before making this operation, read messages on display to be sure that bypass supply is regular and the inverter
is synchronous with it, not to risk a short interruption in powering the load.
IF YOU ARE NOT SURE OF WHAT YOU ARE DOING - THEN DO NOT DO IT.
> INVERTER
LINE
RECTIFIER
RECTIFIER
5. Ensure INVERTER is selected by the cursors and press the ENTER key:
ROTATION
INVERTER
The ON selection should be highlighted, using the UP arrow key, rotate between the selections
offered (in this case it will be ON or OFF) select OFF. Press the ENTER key to execute your
command.
The UPS inverter will now shut down and the load will transfer to the Bypass supply.
The Display window can be returned to normal by operation of the ESCAPE key back through
the various windows.
The Module Mimic indicator Load on bypass ( 3 ) will flash amber and the Load on Inverter
indicator will extinguish.
Your load is now powered via the Static Bypass system.
6. Unfasten the lock, release the internal safety bar and close the maintenance bypass power switch
Q3. Open the Rectifier input power switch Q1, the Output power switch Q4, the bypass power
switch Q2 and the Battery circuit breaker.
The unit will power down but the load will continue to be supplied by the manual bypass.
The following points will be live within the UPS:
• Bypass a.c. input supply terminals
• Maintenance Bypass power switch
• Static Bypass power Switch
• UPS output terminals
Input and output terminals remain protected by an insulating transparent cover.
document in response to "powersure ups"
Caution
ON <
ON
ON
FLO
START 
EXIT C
ON
WARNING
Chapter 2 - Operating Instructions
Procedure
Page 2-3
Issue 6
(03/98)