GE Industrial Solutions SG Series 400 & 500 Operating Manual - Manual (Page 71)

Modifications reserved Page 71/79
OPM_SGS_USM_M40_M50_2US_V010.doc User Manual SG Series 400 & 500 UL S2
7.2.7 Restore to normal operation after “Load Off”
NOTE !
Make sure the all Units of the Parallel System to be status of the activation of “Load
Off”, i. e. UPS Output Switches Q1 closed (Pos. I), Manual Bypass Switches Q2 (option)
open (Pos. O) and External Battery Switch or Fuses connected (Pos. I).
If eBoost™ option is available, make sure that eBoost™ Operation Mode is disabled
before starting the shutdown procedure.
View of the synoptic diagram, on all UPS units, after
pressing the “Load Off” key.
• All Contactors are open.
• Rectifier, Inverter and Static-Switch shutdown.
• LED Alarm is lit.
` Home\Commands
COMMANDS
RESET TOTAL OFF
REQUEST TOTAL OFF
V 
1. Reset “Load Off” of the Parallel System.
Restore the command “Load Off”, on anyone of the
Parallel Units, by entering the screen:
COMMANDS / RESET TOTAL OFF
• The Load is supplied by the Utility through the
Automatic Bypass of all Units.
• Rectifiers start automatically, blinking LED 3 (Rectifier
ON) indicates Soft-start.
• At the end of Rectifier Soft-start, the LED 3 (Rectifier ON)
remains lit.
• LED Alarm is lit.
The Synoptic Diagram, on all UPS units, must display the status “LOAD SUPPLIED BY AUTOMATIC BYPASS”.
Synoptic Diagram of first unit Synoptic Diagram of other units
Continue ►