Modifications reserved Page 43/57
OPM_LPS_3UO_50K_60K_0US_V010.doc Operating Manual LP 33 Series 50 & 60 kVA
7.2 PROCEDURES FOR PARALLEL SYSTEM LP 33 Series
7.2.1 Parallel System start-up of the LP 33 Series
Before connecting hazardous voltages, make sure that:
• The connection to the electrical system has been performed by qualified personnel;
• The equipment frame has been correctly grounded to the main earth;
• Make sure that mains input protection is removed;
• All the panels removed to allow the UPS connection have been correctly reinstalled;
• The UPS switches Q1 and Q2 are OFF (Pos. 0);
• The battery breaker Q3 in OFF.
This procedure must be performed for the first start-up following the installation, with all the units
completely switched Off and not powered.
This procedure presupposes that the load is not yet supplied by the UPS system.
NOTE !
The UPS can be started-up using the battery supply in case the input mains should be
unavailable.
To avoid an incidental battery discharge, it is recommended to proceed to the UPS
start-up having the input mains available.
1. Switch ON the mains power for each unit at the input
distribution panel.
As a result each unit performs a self-test and the LCD will show
the following screen:
EXECUTING MAINBOARD
SELF TEST
00000000000
SELF TEST OK!
The LCD screen will display the number of the unit in the parallel
system (P1, P2, P3 or P4).
NOTE !
In case the alarm “4410 - Mains bypass out of
tolerance” persists, please contact your Service
Center.
2. Turn ON battery breaker in all battery cabinets.
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