76
P
RELIMINARY OPERATIONS AND FIRST START
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UP
Visual check of the connection
Make sure that all the connections have been made by following carefully the instructions given in the "Connections"
paragraph.
Check that all the isolators are open.
Closure of the battery fuse holders
Close the 4 battery fuse holders (SWBATT) as shown in the figure below.
WARNING: if an external Battery Box is present and the connection does not comply with the instructions
given in "Connecting the UPS to the Battery Box (optional)" paragraph, the battery fuses and other
protections may result damaged. In that case, please contact the Customer Service department, in order to
prevent further damages to the UPS.
When the fuses are closed, a small arc may occur due to charge of the condensers inside the UPS. This is
normal, and does not cause faults and/or damages.
UPS powering
Close the protections upstream the UPS.
Closure of the input and output isolators
Close the SWIN and SWBYP (if present) input isolators. Close the SWOUT output isolator but leave the SWMB
maintenance isolator open.
