Liebert Hipulse E - 9.4 Procedure for Switching the UPS into a Maintenance Bypass condition from normal operation.

User Manual Liebert Hipulse E Chapter 9 - Operating Instructions
Single or '1+N' UPS System Procedure
(07/04) Page 9-7
9.4 Procedure for Switching the UPS into a Maintenance Bypass condition from normal
operation.
The first part of this procedure details how to select the Inverter OFF and power the load from the bypass mains via
the Static Switch. This procedure should be followed to transfer the load from the UPS inverter output to the
maintenance bypass system. This may be required during UPS maintenance procedures.
NORMAL OPERATION: follow the procedure below to transfer the load from the inverter output to the
Maintenance Bypass of the UPS.
ECOMODE: follow the procedure below to transfer the load from the output to the Maintenance Bypass of the
UPS.
Caution
The following window allows the operator to select the UPS inverter ON or OFF.
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.
1. Press the INV switch on the left side of the operator control panel.
2. Confirm this operation as instructed at the display:
Press Enter for 1 second to confirm INV OFF
Press Esc for 1 second to exit
3. If Enter is pressed:
The Module Mimic indicator Load on Inverter ( 5 )will extinguish and the Load on Bypass indicator ( 6 ) will
flash amber, and also the red led (13) will flash and normally will accompanied by an audible alarm.
Pressing the Alarm Silence Switch cancels the audible alarm but leaves the warning message displayed until the
appropriate condition is rectified.
NORMAL OPERATION:
4.a The UPS inverter will now shut down and the load will transfer to the Bypass supply.
The Module Mimic indicator Load on Bypass (6) will flash amber and the Load on Inverter (5) indicator will
extinguish.
Your load is now powered via the Static Bypass system.
ECOMODE:
4.b At this point the UPS inverter stops but the load continues to be supplied by the bypass mains.
The Load on Mains indicator light (6) on the unit’s synoptic panel flashes yellow, and the Load on Inverter
indicator light (5) goes off.
Your load is now powered via the Static Bypass system.
WARNING! STOP
INVERTER REQUESTED
ENTER TO CONTINUE 
ESC TO CANCEL