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OPM_LPS_3UO_30K_40K_0US_V010.doc Operating Manual LP 33 Series 30 & 40 kVA
6. In order to discharge the DC link capacitors, start once more
the inverter on each unit through the screen:
MENU/COMMAND MENU/INVERTER ON
COMMAND MENU
INVERTER ON *
INVERTER OFF
Remark: command INVERTER ON will be enabled only when
the inverter voltage of each phase decreases
below 7 VAC (about 30 seconds).
INVERTER: U1= 7V
U2= 7V U3= 7V
Frequency = 60.0Hz
Synchronized
Before proceeding to step 7, check on the display panel that
the DC link voltage (both polarities) Udcp and Udcn has reached
the minimum voltage of 5 VDC (about 30 seconds).
Udcp= 5V Udcn= 5V
Ubp=0V Ubn=0V O
Charge level = 0%
Autonomy = 0min
7. Switch OFF the inverter on each unit entering the screen:
MENU/COMMAND MENU/INVERTER OFF
COMMAND MENU
INVERTER ON
INVERTER OFF *
The load is now supplied directly from the mains through the manual switches Q2.
END OF PROCEDURE
WARNING !
The UPS cabinet contains parts electrically live.
Apart from the front door, do not open any other part of the UPS.
NOTE !
With separate mains inputs, it’s possible to disconnect mains rectifier.