GE 400 User Manual page 50

3. Open the UPS Output Switch Q1 (Pos. O) and then press the "Load Off" key.
•
The load is now supplied only through the Manual Bypass Q2.
•
Rectifier shuts down and all output and input Contactors are opened.
•
Press "MUTE" to reset the alarm buzzer.
The Synoptic Diagram must display the status "LOAD
SUPPLIED BY MANUAL BYPASS Q2".
4. Disconnect the Battery from the UPS by opening (Pos. O) the External Battery Switch or Fuses.
•
Wait 5 minutes for DC-Link Capacitors discharge.
The Load is now powered from the Utility through Manual Bypass Q2 (option).
WARNING!
It will take a minimum of 5 minutes for the DC capacitors to discharge.
Open only the front door, do not open any other part of the UPS.
Modifications reserved
OPM_SGS_USM_M40_M50_2US_V010.doc
END OF PROCEDURE
Page 50/79
User Manual SG Series 400 & 500 UL S2