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V. OPERATING INSTRUCTIONS
After completing the installation of the unit, and connecting all the power cables with all switches and fuses in
“OFF” position,
1. Check the battery polarities.
K1 : + V (+360V Nominal, +405V under float charge)
K2 - K2 (NEUTRAL BUSBAR) : 0 Volts (connected to the midpoint of the 60 blocks battery string)
K3 : - V (-360V Nominal, -405V under float charge)
2. Check the 3 phase AC input and neutral connections. (Phase sequence is important)
NOTE THAT SEPARATE CABLES FROM EACH BATTERY GROUP SHOULD BE CONNECTED TO K2
TERMINALS ON THE NEUTRAL BUSBAR TO FORM THE MIDPOINT CONNECTION!
WARNING!!!
The UPS must never be turned on without input neutral connection.
3. Check the output (load) connections.
5.3.4 Procedure For Turning On The UPS To Supply The Load From A Complete Power-
Off Condition
1. Turn on S1 (AC Input)
2. Turn on S2 (Bypass)
3. Turn on S4 (AC Output)
ATTENTION!!! AS SOON AS YOU TURN ON ON/OFF SWITCH (S7), BYPASS VOLTAGE WILL APPEAR
THE OUTPUT TERMINALS.
4. Turn on S7 (ON/OFF Switch), LCD panel will start running. “RECTIFIER START” message will appear on
the front panel.
5. When “INVERTER START“appears on the front panel turn on S5 (Battery) into “1” position.
After a few seconds, the BYPASS led L4 (red) will turn off and the INVERTER led L6 (green) will turn on. The
UPS is ready for uninterrupted operation when “STATUS NORMAL/ONLINE MODE” message appears on the
front panel.
5.2.2 Power Off
After turning off all the loads connected to UPS output:
1. Turn off S4 (AC Output) into “0” position.
2. Turn off S7 (ON/OFF Switch) into “0” position.
3. Turn off S5 (Battery) into “0” position.
4. Turn off S2 (Bypass) into “0” position.
5. Turn off S1 (AC Input) into “0” position.
This is a complete power off condition and both RECTIFIER and INVERTER are not operating in this
case.
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