Modifications reserved
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6.10
Load transfer: from maintenance bypass to inverter operations
This procedure describes the sequence of operations to be done in order to restart the UPS and
restore ON-LINE mode (Load on Inverter).
WARNING!
THE OPERATIONS DESCRIBED IN THIS CHAPTER MUST BE PERFORMED
BY A SERVICE ENGINEER FROM THE MANUFACTURER OR FROM AN
AGENT CERTIFIED BY THE MANUFACTURER.
Situation of UPS-System before starting the Transfer Procedure to ON-LINE mode:
The load is supplied directly by Input Mains power and the UPS is OFF.
1.
Close battery fuses/breakers in the external battery cabinets or racks.
2.
Make sure all the battery breakers (F3-1, F3-2, F3-3, F3-4, F3-5) in the UPS (if any) and
the external battery cabinets are open.
3.
On the LCD’s: “LOAD OFF, SUPPLY FAILURE” will appear and the mimic panel will
show:
LED Indicator
Colour
LINE 1
Green
LINE 2
OFF
BYPASS
OFF
INVERTER
OFF
BATTERY
Flashing Red
4.
Close Parallel Isolators IA2-1, IA2-2, IA2-3, IA2-4, IA2-5 (depending of the UPS frames)
and check message “PARALLEL SW CLOSED” on LCD of each module.
5.
Press simultaneously the two ON/OFF buttons on the UPS-control panel (PMD) on all
control panels.
Unit will start-up and after about 60 seconds the mimic panel will show:
LED Indicator
Colour
LINE 1
Green
LINE 2
Green
BYPASS
Green
INVERTER
RED
BATTERY
Green
6.
Make sure that the bypass LED is green, then open the Maintenance Bypass Switch IA1
(position OFF).
7.
Using LDC panel, select the COMMANDS menu and choose command “LOAD TO
INVERTER”. This will transfer the LOAD to Inverter on the complete system (all units). On
LCD panel “LOAD PROTECTED” will appear.
THE LOAD IS NOW SUPPLIED BY INVERTER POWER AND IS PROTECTED
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