Liebert EXL S1 Normal and safe operation
User Manual 10H52226UM60 - Rev. 1 - 01/2017
80
5.7. UPS switching procedures
The following pr
ocedures refer to para 5.3. on page 76.
5.7.1. Procedure 1: UPS TURN-ON PROCEDURE
Starting with the UPS completely deenergized, this procedure explains how to switch on the UPS and
set it to Normal Operating Mode.
5.7.2. Procedure 2: UPS TURN-OFF PROCEDURE
Starting with the UPS in the Normal Mode, this procedure explains how to switch off the UPS. When
this procedure is followed, the output voltage is completely turned off and any load connected to UPS
output is shut down.
Warning
If static switch module and relative switches are not assembled, refer to MSS user
manual.
Step Action Status
1 Switch QS1 to the ON position Rectifier start up
2
Switch QS2 to the ON position (wait for the Static Bypass
Switch to switch on)
Static Bypass Switch ON
and fans ON
3
Close external battery switches then set battery breaker
1)
to
the ON position
1) Not available for all ratings
4
Switch QS4 to the ON position
IMPORTANT: when QS4 is closed, the output of the UPS and all
the loads connected to it will be energized.
System in Bypass Mode -
Output voltage present
5 Touch “Inverter On” on the touch screen. Normal Mode
Step Action Status
1 Touch “Inverter Off” on the touch screen. System in Bypass Mode
2
Switch battery breaker
1)
to the OFF position
1) Not available for all ratings
3 Switch QS4 to the OFF position Load not supplied
4 Switch QS2 to the OFF position
5 Switch QS1 to the OFF position
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