6.In order to discharge the DC link capacitors, start once more the inverter through the screen:

MENU/COMMAND MENU/INVERTER ON

Remark: command INVERTER ON will be enabled only when the inverter voltage of each phase decreases below 7 VAC (about 30 seconds).

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).

COMMAND MENU

INVERTER ON * INVERTER OFF

INVERTER: U1= 7V

U2= 7V U3= 7V

Frequency = 60.0Hz

Synchronized

Udcp= 5V

Udcn=

5V

Ubp=0V

Ubn=0V

O

Charge level

=

0%

 

Autonomy

=

0min

 

 

 

 

7.Switch OFF the inverter by entering the screen:

MENU/COMMAND MENU/INVERTER OFF

COMMAND MENU

 

INVERTER ON

 

INVERTER OFF

*

 

 

The load is now powered directly by mains through the manual bypass 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.

Modifications reserved

Page 38/57

OPM_LPS_3UO_30K_40K_0US_V010.doc

Operating Manual LP 33 Series 30 & 40 kVA

Page 38
Image 38
GE LP 33 manual Inverter U1=

LP 33 specifications

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